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1

Modelling pulmonary blood flow  

PubMed Central

Computational model analysis is a method that has been used widely to understand and interpret complexity of interactions in the pulmonary system. Pulmonary blood transport is a multi-scale phenomenon that involves scale-dependent structure and function, therefore requiring different model assumptions for the microcirculation and the arterial or venous flows. The blood transport systems interact with the surrounding lung tissue, and are dependent on hydrostatic pressure gradients, control of vasoconstriction, and the topology and material composition of the vascular trees. This review focuses on computational models that have been developed to study the different mechanisms contributing to regional perfusion of the lung. Different models for the microcirculation and the pulmonary arteries are considered, including fractal approaches and anatomically-based methods. The studies that are reviewed illustrate the different complementary approaches that can be used to address the same physiological question of flow heterogeneity. PMID:18434260

Tawhai, Merryn H.; Burrowes, Kelly S.

2008-01-01

2

Lymph flow pattern in the intact thoracic duct in sheep.  

PubMed Central

1. To study the lymph flow dynamics in the intact thoracic duct, we applied an ultrasound transit-time flow probe in seven anaesthetized and four unanaesthetized adult sheep (approximately 60 kg). In unanaesthetized non-fasting animals we found that lymph flow in the thoracic duct was always regular pulsatile (pulsation frequency, 5.2 +/- 0.8 min-1) with no relation to heart or respiratory activity. At baseline the peak level of the thoracic duct pulse flow was 11.6-20.7 ml min-1 with a nadir of 0-3.6 ml min-1. Mean lymph flow was 5.4 +/- 3.1 ml min-1. The flow pattern of lymph in the thoracic duct was essentially the same in the anaesthetized animals. 2. In both the anaesthetized and unanaesthetized animals, the lymph flow response to a stepwise increase in the outflow venous pressure showed interindividual variation. Some were sensitive to any increase in outflow venous pressure, but others were resistant in that lymph flow did not decrease until outflow venous pressure was increased to higher levels. This resistance was also observed in the high lymph flow condition produced by fluid infusion in the anaesthetized animal and mechanical constriction of the caudal vena cava in the unaesthetized animals. Pulsation frequency of the thoracic duct flow initially increased and then decreased with a stepwise increase in the outflow venous pressure. This initial increase might be a compensatory response to maintain lymph flow against elevated outflow venous pressure. 3. To test the effect of long-term outflow venous pressure elevation in unanaesthetized sheep, outflow venous pressure was increased by inflation of a cuff around the cranial vena cava for 1, 5 or 25 h. The cuff was inflated to a level where lymph flow was reduced. Lymph flow remained low or decreased further during the entire cuff-inflation period. We calculated the lymph debt caused by the outflow venous pressure elevation and the amount 'repaid' when venous pressure returned to normal. Lymph debt for 25 h was 6400 ml but only 200 ml was repaid. Since we observed no visible oedema formation in the lower body of the sheep, the non-colloidal components of the lymph must have been reabsorbed into the bloodstream, most likely in the lymph nodes. PMID:9288690

Onizuka, M; Flateb?, T; Nicolaysen, G

1997-01-01

3

Pulmonary edema associated with methylene blue dye administration during sentinel lymph node biopsy.  

PubMed

Sentinel lymph node biopsy (SLNB) is an established procedure for staging early breast cancer. Recently, methylene blue dye has been advocated as a safe, efficacious and cost-effective substitute for isosulfan blue in sentinel lymph node mapping. In this case report, we describe a 44-year-old woman who developed pulmonary edema associated with the use of methylene blue dye for SLNB. PMID:19110921

Teknos, Daniel; Ramcharan, Alexius; Oluwole, Soji F

2008-12-01

4

Does medical treatment of lymphedema act by increasing lymph flow?  

PubMed

The lymphatic origin of chronic edema of the lower limbs was identified by lymphoscintigraphic exploration. Patients underwent therapy involving 8 days of manual lymph drainage combined with elevation of the limbs during rest periods and double compression bandaging. Manual drainage increased lymph flow in 16 limbs, implying that the edema resulted from a functional lymphatic anomaly. In contrast, manual drainage did not increase lymph flow in 9 limbs, suggesting a structural anomaly of the lymphatics. Hence, the same clinical picture corresponded to two different lymphatic anomalies, distinguished by lymphoscintigraphy. However, the therapeutic results were independent of the lymphoscintigraphic results. Increased lymph flow is therefore not the only explanation for the decrease in edema during therapy. PMID:2609733

François, A; Richaud, C; Bouchet, J Y; Franco, A; Comet, M

1989-01-01

5

Pulmonary compliance and lung volume varies with ecomorphology in anuran amphibians: implications for ventilatory-assisted lymph flux.  

PubMed

Vertical movement of lymph from ventral regions to the dorsally located lymph hearts in anurans is accomplished by specialized skeletal muscles working in concert with lung ventilation. We hypothesize that more terrestrial species with greater lymph mobilization capacities and higher lymph flux rates will have larger lung volumes and higher pulmonary compliance than more semi-aquatic or aquatic species. We measured in situ mean and maximal compliance (?volume/?pressure), distensibility (%?volume/?pressure) and lung volume over a range of physiological pressures (1.0 to 4.0 cmH(2)O) for nine species of anurans representing three families (Bufonide, Ranidae and Pipidae) that span a range of body masses and habitats from terrestrial to aquatic. We further examined the relationship between these pulmonary variables and lymph flux for a semi-terrestrial bufonid (Rhinella marina), a semi-aquatic ranid (Lithobates catesbeianus) and an aquatic pipid (Xenopus laevis). Allometric scaling of pulmonary compliance and lung volume with body mass showed significant differences at the family level, with scaling exponents ranging from ?0.75 in Bufonidae to ?1.3 in Pipidae. Consistent with our hypothesis, the terrestrial Bufonidae species had significantly greater pulmonary compliance and greater lung volumes compared with semi-aquatic Ranidae and aquatic Pipidae species. Pulmonary distensibility ranged from ?20 to 35% cmH(2)O(-1) for the three families but did not correlate with ecomorphology. For the three species for which lymph flux data are available, R. marina had a significantly higher (P<0.001) maximal compliance (84.9±2.7 ml cmH(2)O(-1) kg(-1)) and lung volume (242.1±5.5 ml kg(-1)) compared with L. catesbeianus (54.5±0.12 ml cmH(2)O(-1) kg(-1) and 139.3±0.5 ml kg(-1)) and X. laevis (30.8±0.7 ml cmH(2)O(-1) kg(-1) and 61.3±2.5 ml kg(-1)). Lymph flux rates were also highest for R. marina, lowest for X. laevis and intermediate in L. catesbeianus. Thus, there is a strong correlation between pulmonary compliance, lung volume and lymph flux rates, which suggests that lymph mobilization capacity may explain some of the variation in pulmonary compliance and lung volume in anurans. PMID:21900475

Hedrick, Michael S; Hillman, Stanley S; Drewes, Robert C; Withers, Philip C

2011-10-01

6

Doppler Study on Pulmonary Venous Flow in the Human Fetus  

Microsoft Academic Search

Objectives: The fetal pulmonary circulation is different from the postnatal circulation: the flow is small. The arterial pressure is almost systemic, and the vascular resistance is high. Moreover, lungs are collapsed in the fetus. However, the pulmonary venous flow in the fetus has not been studied. The aims of this study were to look at flow patterns of pulmonary venous

Y. Hong; J. Choi

1999-01-01

7

Pulmonary hilar lymph node metastasis of breast cancer induced bronchopleural fistula and superior vena cava syndrome.  

PubMed

Background It is extremely rare for pulmonary hilar lymph node metastasis (PHLNM) of a cancer to be independently lethal. Here, we report an exceedingly rare case of cavitation in PHLNM from breast cancer triggering broncho-pleural fistula and empyema (BPFE), complicated with superior vena cava syndrome (SVCS). Case Report A 56-year-old woman who had undergone left segmental mastectomy and axillary lymph node dissection due to left breast cancer was then treated for 1 year with postoperative adjuvant chemotherapy. Recurrence of right PHLNM was observed 2 years after the operation, for which 3 courses of bevacizumab (BEV) and paclitaxel combination chemotherapy were administered. The woman had dyspnea and fever during the washout period, and CT examination revealed fistula formation between the right PHLNM cavitation and right main bronchus, so she was admitted for further treatment. This fistula rapidly progressed to BPFE, and contralateral aspiration was observed to cause pneumonia of the left lung. In addition, edema of both upper limbs and head and neck were observed, and CT examination revealed SVCS caused by re-enlargement of PHLNM. Active treatment was performed, but the recommencement of chemotherapy was not possible, and she died on Day 150 of admission. Conclusions We think that PHLNM deteriorated to central necrosis due to chemotherapy with BEV taking effect, leading to formation of BPFE. The case was also made more difficult due to the complication of SVCS caused by the re-enlarged PHLNM. PMID:25399335

Nishinari, Yutaka; Kashiwaba, Masahiro; Umemura, Akira; Komatsu, Hideaki; Sasaki, Akira; Wakabayashi, Go

2014-01-01

8

Modeling blood flow in pulmonary capillary networks  

Microsoft Academic Search

\\u000a Understanding the mechanisms of perfusion in pulmonary capillary networks is essential for understanding gas exchange between\\u000a air and blood. A two-phase-fluid model was developed to investigate mechanisms of blood perfusion and distribution of erythrocytes\\u000a in the capillary of the lung. Rheological investigation of the model fluid was performed showing non-Newtonian behavior of\\u000a the model. The flow around red blood cell

S. Weber; M. Bonfantini; K. Schirrmann; U. Kertzscher; K. Affeld

9

Four-Dimensional Flow Assessment of Pulmonary Artery Flow and Wall Shear Stress in Adult Pulmonary Arterial  

E-print Network

INTRODUCTION Pulmonary hypertension (PH) is associated with substan- tial morbidity and mortality. The disease important given that PAH is not merely a disease of the distal vessels, as the proximal pulmonary arteriesFULL PAPER Four-Dimensional Flow Assessment of Pulmonary Artery Flow and Wall Shear Stress in Adult

Chesler, Naomi C.

10

Altered lymphatics in an ovine model of congenital heart disease with increased pulmonary blood flow  

PubMed Central

Abnormalities of the lymphatic circulation are well recognized in patients with congenital heart defects. However, it is not known how the associated abnormal blood flow patterns, such as increased pulmonary blood flow (PBF), might affect pulmonary lymphatic function and structure. Using well-established ovine models of acute and chronic increases in PBF, we cannulated the efferent lymphatic duct of the caudal mediastinal node and collected and analyzed lymph effluent from the lungs of lambs with acutely increased PBF (n = 6), chronically increased PBF (n = 6), and age-matched normal lambs (n = 8). When normalized to PBF, we found that lymph flow was unchanged following acute increases in PBF but decreased following chronic increases in PBF. The lymph:plasma protein ratio decreased with both acute and chronic increases in PBF. Lymph bioavailable nitric oxide increased following acute increases in PBF but decreased following chronic increases in PBF. In addition, we found perturbations in the transit kinetics of contrast material through the pleural lymphatics of lambs with chronic increases in PBF. Finally, there were structural changes in the pulmonary lymphatic system in lambs with chronic increases in PBF: lymphatics from these lambs were larger and more dilated, and there were alterations in the expression of vascular endothelial growth factor-C, lymphatic vessel endothelial hyaluronan receptor-1, and Angiopoietin-2, proteins known to be important for lymphatic growth, development, and remodeling. Taken together these data suggest that chronic increases in PBF lead to both functional and structural aberrations of lung lymphatics. These findings have important therapeutic implications that warrant further study. PMID:22207591

Datar, Sanjeev A.; Johnson, Eric G.; Oishi, Peter E.; Johengen, Michael; Tang, Eric; Aramburo, Angela; Barton, Jubilee; Kuo, Hsuan-Chang; Bennett, Stephen; Xoinis, Konstantine; Reel, Bhupinder; Kalkan, Gokhan; Sajti, Eniko; Osorio, Oscar; Raff, Gary W.; Matthay, Michael A.

2012-01-01

11

Dynamic Contrast-Enhanced Magnetic Resonance Imaging of Tumor-Induced Lymph Flow12  

PubMed Central

The growth of metastatic tumors in mice can result in markedly increased lymph flow through tumor-draining lymph nodes (LNs), which is associated with LN lymphangiogenesis. A dynamic magnetic resonance imaging (MRI) assay was developed, which uses low.molecular weight gadolinium contrast agent to label the lymphatic drainage, to visualize and quantify tumor-draining lymph flow in vivo in mice bearing metastatic melanomas. Tumor-bearing mice showed greatly increased lymph flow into and through draining LNs and into the bloodstream. Quantitative analysis established that both the amount and the rate of lymph flow through draining LNs are significantly increased in melanoma-bearing mice. In addition, the rate of appearance of contrast media in the bloodstream was significantly increased in mice bearing melanomas. These results indicate that gadolinium-based contrast-enhanced MRI provides a noninvasive assay for high-resolution spatial identification and mapping of lymphatic drainage and for dynamic measurement of changes in lymph flow associated with cancer or lymphatic dysfunction in mice. Low-molecular weight gadolinium contrast is already used for 1.5-T MRI scanning in humans, which should facilitate translation of this imaging assay. PMID:18592009

Ruddell, Alanna; Harrell, Maria I; Minoshima, Satoshi; Maravilla, Kenneth R; Iritani, Brian M; White, Steven W; Partridge, Savannah C

2008-01-01

12

Monitoring of lymph flow in microvessels by biomicroscopy and speckle-interferometry  

NASA Astrophysics Data System (ADS)

In the paper lymph flow in microvessels by two methods in norm and under influence of vasoactive drugs: N-nitro-L- Arginine (L-NNA, 10-4M and dimethyl sufoxide (DMSO, 30%) was studied. We measured absolute linear flow velocity by microscopic method and parameter proportional to velocity (M1) using the speckle-interferometry. Also other parameters of lymph and blood microcirculation were measured. The lymph flow differs from blood flow. The average flow velocity for the lymphatics is more than for the blood microvessels. The negative correlation between blood flow velocity and diameter of vessel absents in lymphatics. The phase contractions contribute to the lymph flow. The M1 in contracting lymphatics are of the same values in different vessels. But the non-contracting microvessels has very varying indexes of M1. Probably the wall movements during phasic contractions led to the change of speckle signals. The action of vasoactive drugs (L-NNA and DMSO) stimulates the lymph flow and phasic activity in microvessels of rat mesentery. The effects of L-NNA and DMSO on diameters are different. The constriction of microvessels prevailed at the DMSO application. The dilatation dominated at the L-NNA action.

Galanzha, Ekateryna I.; Solov'eva, Anastasiya V.; Brill, Gregory E.; Ulyanov, Sergey S.; Tuchin, Valery V.

2001-05-01

13

Pulmonary blood flow and pulmonary hypertension: Is the pulmonary circulation flowophobic or flowophilic?  

PubMed Central

Increased pulmonary blood flow (PBF) is widely thought to provoke pulmonary vascular obstructive disease (PVO), but the impact of wall shear stress in the lung is actually poorly defined. We examined information from patients having cardiac lesions which impact the pulmonary circulation in distinct ways, as well as experimental studies, asking how altered hemodynamics impact the risk of developing PVO. Our results are as follows: (1) with atrial septal defect (ASD; increased PBF but low PAP), shear stress may be increased but there is little tendency to develop PVO; (2) with normal PBF but increased pulmonary vascular resistance (PVR; mitral valve disease) shear stress may also be increased but risk of PVO still low; (3) with high PVR and PBF (e.g., large ventricular septal defect), wall shear stress is markedly increased and the likelihood of developing PVO is much higher than with high PBF or PAP only; and (4) with ASD, experimental and clinical observations suggest that increased PBF plus another stimulus (e.g., endothelial inflammation) may be required for PVO. We conclude that modestly increased wall shear stress (e.g., ASD) infrequently provokes PVO, and likely requires other factors to be harmful. Likewise, increased PAP seldom causes PVO. Markedly increased wall shear stress may greatly increase the likelihood of PVO, but we cannot discriminate its effect from the combined effects of increased PAP and PBF. Finally, the age of onset of increased PAP may critically impact the risk of PVO. Some implications of these observations for future investigations are discussed. PMID:23130101

Kulik, Thomas J.

2012-01-01

14

Inhibition of the active lymph pump by flow in rat mesenteric lymphatics and thoracic duct  

NASA Technical Reports Server (NTRS)

There are only a few reports of the influence of imposed flow on an active lymph pump under conditions of controlled intraluminal pressure. Thus, the mechanisms are not clearly defined. Rat mesenteric lymphatics and thoracic ducts were isolated, cannulated and pressurized. Input and output pressures were adjusted to impose various flows. Lymphatic systolic and diastolic diameters were measured and used to determine contraction frequency and pump flow indices. Imposed flow inhibited the active lymph pump in both mesenteric lymphatics and in the thoracic duct. The active pump of the thoracic duct appeared more sensitive to flow than did the active pump of the mesenteric lymphatics. Imposed flow reduced the frequency and amplitude of the contractions and accordingly the active pump flow. Flow-induced inhibition of the active lymph pump followed two temporal patterns. The first pattern was a rapidly developing inhibition of contraction frequency. Upon imposition of flow, the contraction frequency immediately fell and then partially recovered over time during continued flow. This effect was dependent on the magnitude of imposed flow, but did not depend on the direction of flow. The effect also depended upon the rate of change in the direction of flow. The second pattern was a slowly developing reduction of the amplitude of the lymphatic contractions, which increased over time during continued flow. The inhibition of contraction amplitude was dependent on the direction of the imposed flow, but independent of the magnitude of flow. Nitric oxide was partly but not completely responsible for the influence of flow on the mesenteric lymph pump. Exposure to NO mimicked the effects of flow, and inhibition of the NO synthase by N (G)-monomethyl-L-arginine attenuated but did not completely abolish the effects of flow.

Gashev, Anatoliy A.; Davis, Michael J.; Zawieja, David C.; Delp, M. D. (Principal Investigator)

2002-01-01

15

Lymph flow and contractile activity of mesenteric lymph nodes in rats with toxic hepatitis effects of antioxidants.  

PubMed

We studied contractile function of isolated mesenteric lymph nodes in rats with toxic hepatitis. We observed suppression of spontaneous and stimulated contractile activity of mesenteric lymph nodes and changes in biochemical composition of the lymph. We propose a method of correction of these dysfunctions with antioxidant ?-tocopherol and Selen-Active. PMID:23667863

Abdreshov, S N; Bulekbayeva, L E; Demshenko, G A

2013-05-01

16

Diagnosis of fetal pulmonary hypoplasia by measurement of blood flow velocity waveforms of pulmonary arteries with Doppler ultrasonography  

Microsoft Academic Search

Objective: The aim of the study was to determine the utility of ultrasonographically recorded blood flow waveforms of the pulmonary artery in the diagnosis of pulmonary hypoplasia. Study Design: The normal values of the pulsatility index and peak systolic flow of pulmonary arterial blood velocity waveforms were determined in 300 uncomplicated single fetus pregnancies with well-established gestational ages between 24

Shuichiro Yoshimura; Hideaki Masuzaki; Kiyonori Miura; Kunio Muta; Hideo Gotoh; Tadayuki Ishimaru

1999-01-01

17

The effect of fluid volume loading on exclusion of interstitial albumin and lymph flow in the dog lung.  

PubMed

The excluded volume fraction for interstitial albumin (FE) was estimated in the lungs of seven mongrel dogs during steady state conditions following intravenous infusions of Ringer's solution, amounting to 0, 5, 10, and 15% of body weight (BW). We estimated the tissue blood volume with 51Cr red cells, extracellular space with 99mTc-diethylenetriaminepentaacetic acid (99mTc-DTPA), and the albumin pool with 125I human serum albumin. A prenodal tracheobronchial lymphatic was cannulated for recording lymph flow (QL), total protein (CL), and albumin [CL(A)] concentrations. From these measurements, we calculated the extravascular albumin content (QA) and 99mTc-DTPA space (VI) of lung tissue samples collected at the successive volume expansions. The apparent tissue concentration of albumin (CApp = QA/VI) decreased from a control value (mean +/- SE) of 0.89 +/- 0.06 to 0.46 +/- 0.04 g/dl following the 15% BW infusion, whereas CL(A) decreased from 1.43 +/- 0.16 to 0.50 +/- 0.07 g/dl for the same volume expansion. By assuming that pulmonary lymph represented tissue fluid, we calculated a control FE of 0.38 +/- 0.02 using the equation, FE = 1 - [CApp/CL(A)]. FE decreased following successive infusions to 0.28 +/- 0.03, 0.16 +/- 0.02, and 0.10 +/- 0.02. These data indicate a significant contribution by the decrease in FE to the total decrease in tissue albumin concentration as interstitial fluid volume increased. Somewhat unexpectedly, the mean steady state QL increased by only 2.1-fold following the 5% BW expansion, but did not further increase following subsequent volume expansions. This has been attributed to a nonlinear interstitial compliance, sequestration of interstitial fluid, or possible deterioration of the experimental preparation. PMID:476867

Parker, J C; Falgout, H J; Parker, R E; Granger, D N; Taylor, A E

1979-10-01

18

Effective pulmonary blood flow in normal children at rest.  

PubMed Central

Effective pulmonary blood flow was measured with a soluble inert gas uptake method (10% argon, 3.5% freon-22, 35% oxygen, balance nitrogen) in 98 apparently healthy children aged 5-14 years. None had any evidence of cardiorespiratory disease and all had normal values for absolute and dynamic lung volumes and transfer factor for carbon monoxide. Values of blood flow measured by a rebreathing method correlated reasonably closely with height, weight, body surface area, and lung volumes, and to a lesser extent with hand and foot size. The mean (SD) effective pulmonary blood flow index was 2.7 (0.31) 1 min-1 m-2. Small children found a single breath method of measuring flow more difficult to perform and the results were more variable. PMID:3238641

Bowyer, J J; Warner, J O; Denison, D M

1988-01-01

19

Quantification of Regional Pulmonary Blood Flow Using D.S. Bolar,1  

E-print Network

of pulmonary blood flow (PBF) to ventilation is essential for efficient gas exchange. The ability to quantiQuantification of Regional Pulmonary Blood Flow Using ASL-FAIRER D.S. Bolar,1 D.L. Levin,1* S) quantification. In this study ASL-FAIRER was used to measure regional pulmonary blood flow (rPBF) in seven

Liu, Thomas T.

20

POSTER PRESENTATION Open Access 4D flow-sensitive MR estimation of pulmonary  

E-print Network

in the heart and pulmonary arteries in patients with cardiopulmonary disease. Data from a dif- ferent cohortPOSTER PRESENTATION Open Access 4D flow-sensitive MR estimation of pulmonary vascular resistance Background Pulmonary arterial hypertension (PAH) is characterized by progressive increase in pulmonary

Chesler, Naomi C.

21

Lymphatic Pump Treatment Increases Thoracic Duct Lymph Flow in Conscious Dogs with Edema Due to Constriction of the Inferior Vena Cava  

PubMed Central

Abstract Background Osteopathic lymphatic pump treatments (LPT) are used to treat edema, but their direct effects on lymph flow have not been studied. In the current study, we examined the effects of LPT on lymph flow in the thoracic duct of instrumented conscious dogs in the presence of edema produced by constriction of the inferior vena cava (IVC). Methods and Results Six dogs were surgically instrumented with an ultrasonic flow transducer on the thoracic lymph duct and catheters in the descending thoracic aorta and in IVC. After postoperative recovery, lymph flow and hemodynamic variables were measured 1) pre-LPT, 2) during 4?min LPT, 3) post-LPT, in the absence and presence of edema produced by IVC constriction. This constriction increased abdominal girth from 60?±?2.6 to 75?±?2.9?cm. Before IVC constriction, LPT increased lymph flow (P?lymph flow (P?lymph flow mobilized by 4?min of LPT (ie, the flow that exceeded 4?min of baseline flow), was 10.6?ml after IVC constriction. This incremental flow was not significantly greater than that measured before IVC constriction. Conclusions Edema caused by IVC constriction markedly increased lymph flow in the thoracic duct. LPT increased thoracic duct lymph flow before and after IVC constriction. The lymph flow mobilized by 4?min of LPT in presence of edema was not significantly greater than that mobilized prior to edema. PMID:20863267

Prajapati, Parna; Shah, Pankhil; King, Hollis H.; Williams, Arthur G.; Desai, Pratikkumar

2010-01-01

22

Caring for patients with lesions decreasing pulmonary blood flow.  

PubMed

Congenital heart defects with decreased pulmonary blood flow are generally complex lesions. Nursing care of these patients requires a comprehensive understanding of the hemodynamic effects, clinical manifestations, and the medical and surgical management of cyanotic heart disease. This in-depth understanding will enable the nurse to appropriately assess the infant's or child's cardiovascular functioning during the acute phase of illness, after surgery, and during convalescent periods. Close collaboration among the entire cardiovascular team is essential to promote high-quality care for these truly complex patients. PMID:2684228

Kulik, L A

1989-06-01

23

Factors affecting regional pulmonary blood flow in chronic ischemic heart disease  

SciTech Connect

To assess the effect of left heart disease on pulmonary blood flow distribution, we measured mean pulmonary arterial and wedge pressures, cardiac output, pulmonary vascular resistance, pulmonary blood volume, and arterial oxygen tension before and after treatment in 13 patients with longstanding ischemic heart failure and pulmonary edema. Pulmonary edema was evaluated by a radiographic score, and regional lung perfusion was quantified on a lung scan by the upper to lower third ratio (U:L ratio) of pulmonary blood flow per unit of lung volume. In all cases, redistribution of lung perfusion toward the apical regions was observed; this pattern was not affected by treatment. After treatment, pulmonary vascular pressures, resistance, and edema were reduced, while pulmonary blood volume did not change. At this time, pulmonary vascular resistance showed a positive correlation with the U:L ratio (r = 0.78; P less than 0.01), whereas no correlation was observed between U:L ratio and wedge pressure, pulmonary edema, or arterial oxygen tension. Hence, redistribution of pulmonary blood flow, in these patients, reflects chronic structural vascular changes prevailing in the dependent lung regions.

Pistolesi, M.; Miniati, M.; Bonsignore, M.; Andreotti, F.; Di Ricco, G.; Marini, C.; Rindi, M.; Biagini, A.; Milne, E.N.; Giuntini, C.

1988-07-01

24

Pulmonary fluid flow challenges for experimental and mathematical modeling.  

PubMed

Modeling the flow of fluid in the lungs, even under baseline healthy conditions, presents many challenges. The complex rheology of the fluids, interaction between fluids and structures, and complicated multi-scale geometry all add to the complexity of the problem. We provide a brief overview of approaches used to model three aspects of pulmonary fluid and flow: the surfactant layer in the deep branches of the lung, the mucus layer in the upper airway branches, and closure/reopening of the airway. We discuss models of each aspect, the potential to capture biological and therapeutic information, and open questions worthy of further investigation. We hope to promote multi-disciplinary collaboration by providing insights into mathematical descriptions of fluid-mechanics in the lung and the kinds of predictions these models can make. PMID:25096289

Levy, Rachel; Hill, David B; Forest, M Gregory; Grotberg, James B

2014-12-01

25

A capillary network model for pulmonary blood flow and neutrophil transit  

Microsoft Academic Search

A new computational method is developed for generating structurally realistic pulmonary capillary networks and for predicting pulmonary blood flow and RBC and neutrophil transit. Using this model, one can calculate local flow rate, pressure and hematocrit distributions in a capillary network, and evaluate the effects of transpulmonary pressure. Ptp, transcapillary pressure Ptm and capillary blockage on them. Comparisons with experimental

Yaqi Huang; C. M. Doerschuk; R. D. Kamm

1999-01-01

26

Numerical Study for Blood Flow in Pulmonary Arteries after Repair of Tetralogy of Fallot  

PubMed Central

Pulmonary regurgitation (PR) is a common phenomenon in pulmonary arteries in patients after repair of tetralogy of Fallot (TOF). The regurgitation fraction of left pulmonary artery (LPA) is usually greater than right pulmonary artery (RPA) according to clinic data. It may be related to blood flow in pulmonary arteries. Therefore, understanding hemodynamics in pulmonary arteries helps to comprehend the reason. The aim of this study is to use 3D reconstructed pulmonary artery models from magnetic resonance imaging (MRI) and to use numerical approaches for simulation of flow variations in pulmonary arteries after repair of TOF. From the numerical results, the blood flow is influenced by the bifurcation angles and geometry of pulmonary artery. The regurgitation happens first in LPA after repair of TOF due to the small angle between LPA and main pulmonary artery (MPA). The recirculation region which obstructs forward blood flow to the left lung is found in LPA during acceleration of systole. We also analyze the pressure distribution; the extreme pressure variations are in dilation area of MPA. Numerical data including regurgitation in MPA, LPA, and RPA are compared with phase contrast MR measured data. Good agreements are found between numerical results and measured data. PMID:23431355

Wu, Ming-Ting; Her, Sheau-Wei

2012-01-01

27

Generating a Pulsatile Pulmonary Flow after Fontan Operation by Means of Computational Fluid Dynamics (CFD)  

NASA Astrophysics Data System (ADS)

This study considers blood flow in total cavopulmonary connection (TCPC) morphology, which is created in Fontan surgical procedure in patients with single ventricle heart disease. Ordinary process of TCPC operation reduces pulmonary blood flow pulsatility; because of right ventricle being bypassed. This phenomenon causes a lot of side effects for patients. A cardiac surgeon has suggested that keeping main pulmonary artery (MPA) partially open, would increase pulmonary flow pulsations. MPA gets closed in ordinary TCPC operation. The purpose of current study is to verify the effects of keeping MPA partially open on pulmonary flow pulsations, by means of computational fluid dynamics (CFD). 3D geometry is reconstructed from CT Angiography (CTA) scan of a patient who has undergone an ordinary TCPC procedure. The stenosed MPA or pulmonary stenosis (PS) is virtually added to the original geometry. Flow field is studied in six different models in which average antegrade flow (AF) -coming through PS- increases gradually. Results show that adding AF increases flow pulsations in both pulmonary arteries. Moreover, power loss increases with respect to average AF. We conclude that adding AF is an impressive way to increase pulsations of pulmonary flow, but energy losses should be considered too.

Ghoreyshi, Mostafa

2011-03-01

28

Problems in cerebral blood flow calculation using xenon-133 in patients with pulmonary diseases  

SciTech Connect

We used the end-tidal concentration of xenon-133 (air curve) to estimate the profile of its arterial concentration in calculating cerebral blood flow. We examined the effects of pulmonary disease and artificial ventilation on the air curve and the calculated cerebral blood flow. We studied the relation between arterial and end-tidal xenon activities in 19 subjects, of whom 15 had pulmonary dysfunction. The t 1/2 of the declining phases of the arterial and air curves were used to express their shapes. The mean +/- SD reference t 1/2 from 15 normal volunteers was 26.8 +/- 8.4 seconds. The mean +/- SD t 1/2 s of the air and arterial curves from the 15 patients with pulmonary dysfunction were 10.4 +/- 2.9 and 33.8 +/- 10.9 seconds. The degree of pulmonary dysfunction (expressed as the pulmonary shunt percentage) correlated with distortion of the air curve. Substituting the arterial for the air curve, mean calculated cerebral blood flow (as the initial slope index) increased from 40 to 61 for the 12 patients with chronic obstructive pulmonary disease. The degree of underestimation of cerebral blood flow using the air curve correlated with the pulmonary shunt percentage. Our work confirms the problems of estimating cerebral blood flow in subjects with pulmonary dysfunction.

Hansen, M.; Jakobsen, M.; Enevoldsen, E.; Egede, F. (Odense Univ. Hospital (Denmark))

1990-05-01

29

Systemic and pulmonary flow in mitral stenosis: evidence for a bronchial vein shunt.  

PubMed

We measured pulmonary and systemic flows in 22 patients with mitral stenosis and in 7 controls. In patients with mitral stenosis, pulmonary flow index averaged 2.33 +/- 0.41 l/min/m2 and systemic flow index averaged 2.15 +/- 0.60 l/min/m2, p = 0.045. There was a strong correlation between the difference in pulmonary and systemic flow indexes and the difference in mean left and right atrial pressure (r = 0.749, p = 0.00008). After a successful dilatation in 17 patients, there was a significant drop in the difference between pulmonary and systemic flow indexes (0.26 +/- 0.41 vs. 0.07 +/- 0.37 l/min/m2, p = 0.048). We conclude that chronic elevation of left atrial pressure leads to a left to right shunt probably through bronchial veins. PMID:1889049

Babic, U U; Popovic, Z; Grujicic, S; Pejcic, P; Djurisic, Z; Vucinic, M

1991-01-01

30

Axial flow velocity patterns in a normal human pulmonary artery model: pulsatile in vitro studies.  

PubMed

It has been clinically observed that the flow velocity patterns in the pulmonary artery are directly modified by disease. The present study addresses the hypothesis that altered velocity patterns relate to the severity of various diseases in the pulmonary artery. This paper lays a foundation for that analysis by providing a detailed description of flow velocity patterns in the normal pulmonary artery, using flow visualization and laser Doppler anemometry techniques. The studies were conducted in an in vitro rigid model in a right heart pulse duplicator system. In the main pulmonary artery, a broad central flow field was observed throughout systole. The maximum axial velocity (150 cm s-1) was measured at peak systole. In the left pulmonary artery, the axial velocities were approximately evenly distributed in the perpendicular plane. However, in the bifurcation plane, they were slightly skewed toward the inner wall at peak systole and during the deceleration phase. In the right pulmonary artery, the axial velocity in the perpendicular plane had a very marked M-shaped profile at peak systole and during the deceleration phase, due to a pair of strong secondary flows. In the bifurcation plane, higher axial velocities were observed along the inner wall, while lower axial velocities were observed along the outer wall and in the center. Overall, relatively low levels of turbulence were observed in all the branches during systole. The maximum turbulence intensity measured was at the boundary of the broad central flow field in the main pulmonary artery at peak systole. PMID:2324117

Sung, H W; Yoganathan, A P

1990-01-01

31

A computational approach to study the effect of multiple lymphangion coordination on lymph flow  

E-print Network

The lymphatic system acts to return fluid from the interstitial space back into the blood circulation. In normal conditions, lymphangions, the segment of lymphatic vessel in between valves, cyclically contract and can pump lymph from low pressure...

Madabushi Venugopal, Arun

2005-11-01

32

Effects of Antenatal Betamethasone on Human Fetal Branch Pulmonary Artery Flow Velocity Waveforms  

Microsoft Academic Search

Objective: To evaluate the effect of antenatal betamethasone on fetal branch pulmonary artery flow velocity waveforms. Methods: Betamethasone 12 mg i.m. in 2 injections 24 h apart was given to 25 pregnant women at risk of preterm delivery. Pulsatility (PI) and resistance (RI) indexes were measured at the proximal, middle and distal segments of the fetal pulmonary artery before and

José L. Bartha; Marta Largo-Heinrich; María J. Machado; Fernando González-Bugatto; Blas Hervías-Vivancos

2008-01-01

33

Antenatal prediction of pulmonary hypoplasia by acceleration time\\/ejection time ratio of fetal pulmonary arteries by Doppler blood flow velocimetry  

Microsoft Academic Search

Objective: The purpose of this study was to develop a new method for the antenatal prediction of pulmonary hypoplasia by Doppler blood flow velocimetry. Study Design: One hundred seventy-seven fetuses (160 normal fetuses and 17 fetuses with congenital anomalies that may affect fetal lung growth and\\/or development) were studied. Blood flow waveforms at the main branches of the pulmonary arteries

Shinji Fuke; Toru Kanzaki; Junwu Mu; Kenshi Wasada; Masahiko Takemura; Nobuaki Mitsuda; Yuji Murata

2003-01-01

34

Effect of furosemide on pulmonary blood flow distribution in resting and exercising horses  

Microsoft Academic Search

on pulmonary blood flow distribution in resting and exercis- ing horses. J. Appl. Physiol. 86(6): 2034-2043, 1999.—We determined the spatial distribution of pulmonary blood flow (PBF) with 15-µm fluorescent-labeled microspheres during rest and exercise in five Thoroughbred horses before and 4 h after furosemide administration (0.5 mg\\/kg iv). The primary finding of this study was that PBF redistribution occurred from

HOWARD H. ERICKSON; SUSAN L. BERNARD; ROBB W. GLENNY; M. ROGER FEDDE; NAYAK L. POLISSAR; RANDALL J. BASARABA; STEN M. WALTHER; EARL M. GAUGHAN; ROSE MCMURPHY; MICHAEL P. HLASTALA

35

Intraoperative Evaluation of Pulmonary Artery Flow During the Fontan Procedure by Transesophageal Doppler Echocardiography  

Microsoft Academic Search

After the Fontan procedure, pulmonary artery (PA) flow is maintained without right ventricular pump function. We evaluated intraoperative PA flow velocity patterns using transesophageal Doppler echocardiog- raphy (TEE) immediately after cardiopulmonary by- pass (CPB) in patients during Fontan or hemi-Fontan procedures. We studied 10 patients with single- ventricle physiology (age range, 5 mo to 3 yr 1 mo). Anesthesia was

Shinji Kawahito; Hiroshi Kitahata; Katsuya Tanaka; Junpei Nozaki; Shuzo Oshita

2000-01-01

36

Continuous air embolization into sheep causes sustained pulmonary hypertension and increased pulmonary vasoreactivity.  

PubMed Central

Baseline pulmonary arterial, left atrial and systemic artery pressures, cardiac output, and lung lymph flow were measured in seven chronically catheterized sheep before continuous air embolization into the pulmonary artery, which caused a two-to-threefold increase in pulmonary vascular resistance (PVR) for 12 days. Air embolization was discontinued on days 4, 8, and 12 and hemodynamic measurements were repeated. Thromboxane B2, 6-keto-PGF1 alpha, and protein were measured in lung lymph and blood plasma on days 0, 4, 8 and 12. Air embolization caused an acute, sustained rise in pulmonary artery pressure and PVR (baseline, 3.68 +/- 0.21; air, 8.32 +/- 0.62, mean +/- SE). By day 4, PVR was increased significantly even when air flow was interrupted (5.97 +/- 0.72) and by day 12, it was almost twice baseline; pulmonary artery pressure also remained elevated (baseline, 19 +/- 1 cm H2O; day 12, 31 +/- 3). Pulmonary vasoreactivity to PGH2-A was significantly increased on days 4, 8, and 12 (day 12, 285 +/- 41% of baseline response). Lung lymph flow, protein, and thromboxane clearance were increased throughout the study while clearance of 6-keto-PGF1 alpha was increased at day 4 and falling by day 8. At autopsy, morphometric analysis of the barium-injected pulmonary arterial bed revealed striking structural remodeling, extension of muscle into smaller arteries than normal: decreased peripheral arterial filling, increased medial thickness, and dilated large pulmonary arteries. Continuous air embolization into sheep causes the structural and functional changes of chronic pulmonary hypertension accompanied by increased pulmonary vasoreactivity to a bolus of PGH2-A. The abrupt onset of the sustained elevation in PVR induced by air embolization may account for the severity of the structural remodelling, particularly for the increased medial thickness. Images Figure 4 Figure 6 Figure 7 PMID:3414777

Perkett, E. A.; Brigham, K. L.; Meyrick, B.

1988-01-01

37

Phenotypic analysis by flow cytometry of surface immunoglobulin light chains and B and T cell antigens in lymph nodes involved with non-Hodgkin's lymphoma.  

PubMed

The objective of this study was to demonstrate the diagnostic usefulness of flow cytometric analysis of surface membrane immunoglobulin light chain and monoclonal antibody reactivities in B cell non-Hodgkin's lymphoma. For this purpose, lymph node cell suspensions from 80 patients (20 normal lymph nodes, 11 lymph nodes with benign lymphoid hyperplasia, and 47 lymph nodes with B cell non-Hodgkin's lymphoma) were studied to detect the expression of surface B and T cell differentiation antigens recognized by a panel of monoclonal antibodies (anti-Leu-1, anti-Leu-5, anti-HLA-DR, J-5, anti-BL-1, anti-BL-2, and anti-BL-7). The clonal excess calculation, percent kappa-positive minus percent lambda-positive/percent kappa-positive plus percent lambda-positive cells per discrete level of fluorescence intensity, was used to study the clonality of surface membrane immunoglobulin light chain expression. Among the BL surface antigens, BL-7 proved to be most consistently expressed in B cell non-Hodgkin's lymphoma (79 percent). It was also present in 57 percent of lymph nodes with benign hyperplasia. No significant relationships were detected between the patterns of reactivity with the anti-BL monoclonal antibodies and histologic subtypes, although the small number of cases tested in each category precludes any definitive conclusions. Immunophenotypic heterogeneity within subgroups was also observed with expression of the other antigens examined. Monoclonal expression of surface membrane immunoglobulin light chain was seen in 43 of 47 (91 percent) of lymph nodes with non-Hodgkin's lymphoma, three of 11 (27 percent) hyperplastic lymph nodes, and one of 22 (4 percent) normal lymph nodes. When the presence of BL-7 and clonal excess was examined as a panel, 83 percent of B cell non-Hodgkin's lymphomas were positively identified, whereas one normal lymph node and no hyperplastic lymph nodes gave positive results. The simultaneous presence of clonal excess and BL-7 can be a useful diagnostic aid in the differentiation of lymphomatous from hyperplastic lymph nodes. Cytofluorimetry provides a rapid, objective, and reproducible technology to confirm the diagnosis of lymph node involvement in B cell non-Hodgkin's lymphoma. PMID:3931469

Liendo, C; Danieu, L; Al-Katib, A; Koziner, B

1985-10-01

38

The adjustable systemic-pulmonary artery shunt provides precise control of flow in vivo.  

PubMed

The ratio of pulmonary:systemic blood flow (Qp:Qs) remains problematic after single ventricle reconstruction. The adjustable systemic-pulmonary artery shunt (AS) was created as a solution for this problem. Prototype ASs were created using a screw-plunger mechanism as a variable resistor. A stepper motor controls plunger displacement. Six adult dogs underwent placement of a 4-mm AS in the femoral position to test its ability to control flow. Shunts were placed as arteriovenous fistulae to simulate the continuous flow of systemic-pulmonary AS. The 3.5-mm control shunts (CS) were placed on the contralateral side. The stepper motor was rotated from fully open to 3.4 mm of plunger depression for six complete cycles. Flow in the fully open AS was 687.9 +/- 28.7 cc/min* vs. 578.7 +/- 26.8 cc/min in the CS (flow +/- standard error, *p < 0.005 vs. CS). Standard deviation of flow was similar between the AS and CS, implying hysteresis in resistor function did not contribute to flow variability. Peak torque requirement to turn the resistor was 2.4 mNm. The AS offers excellent control of flow in vivo. Control of Qp:Qs may lead to improved outcomes for single ventricle reconstructions. PMID:20051834

Douglas, William I; Moore, Karabeth B; Resig, Phillip P; Mohiuddin, M Waqar

2010-01-01

39

Supramaximal Flows: Comparison between Asthmatics and Patients with Chronic Obstructive Pulmonary Disease  

Microsoft Academic Search

Background: The major motive that prompted this study was to investigate whether or not the differences in supramaximal flow (SF) behavior between patients suffering from asthma and patients suffering from chronic obstructive pulmonary disease (COPD) might aid in clarifying the differences in the physiopathology of the two diseases. Objectives: The aim of the present study was therefore to compare SFs

Alejandra González; Alejandra Fernández; Sergio Guardia; Hernando Sala

2011-01-01

40

Effect of gravitational and inertial forces on vertical distribution of pulmonary blood flow  

NASA Technical Reports Server (NTRS)

Vertical distribution of pulmonary blood flow (VDPBF) was studied, using radioactive microsphere emboli, in dogs without thoracotomy in the right decubitus position during exposure to lateral accelerations of 1, 2, 4, and 6 G. At all levels of force environment studied, an inverse linear relationship was observed between vertical height in the thorax and pulmonary blood flow (ml/min/ml lung tissue) with a decrease in flow to the most dependent region of the lung despite large increases in intravascular pressures at this site. Changes in blood flow were smallest at the mid-lung level, the hydrostatic 'balance point' for vascular and pleural pressures. These force environment-dependent changes in VDPBF are not readily explainable by the Starling resistor analog. Gravity-dependent regional differences in pleural and associated interstitial pressures, plus possible changes in vascular tone resulting from inadequate aeration of blood in the most dependent regions of the lung, probably also affect VDPBF.

Chevalier, P. A.; Reed, J. H., Jr.; Vandenberg, R. A.; Wood, E. H.

1978-01-01

41

Effects of posture on blood flow diversion by hypoxic pulmonary vasoconstriction in dogs  

NASA Technical Reports Server (NTRS)

We used differential excretion of sulphur hexafluoride from the left and right lung to measure blood flow diversion by hypoxic pulmonary vasoconstriction (HPV) in the prone and supine positions in dogs (n = 9). Gas exchange was assessed using the multiple inert gas elimination technique. Blood flow diversion from the hypoxic (3% oxygen) left lung was mean 70.7 (SD 11.2)% in the supine compared with 57.0 (12.1)% in the prone position (P < 0.02). The supine position was associated with increased perfusion to low VA/Q regions (P < 0.05). The increased flow diversion with hypoxia in the supine position was associated with more ventilation to high VA/Q regions (P < 0.05). We conclude that flow diversion by hypoxic pulmonary vasoconstriction is greater in the supine position. This effect could contribute to the variable response in gas exchange with positioning in patients with ARDS.

Walther, S. M.; Domino, K. B.; Hlastala, M. P.

1998-01-01

42

[Evaluation of aortic to pulmonary blood flow ratio by Doppler echocardiography in septal defects].  

PubMed

Pulsed Doppler-echocardiography was used to measure systemic and pulmonary blood flows in 22 patients aged from 3 months to 62 years presenting with interatrial (n = 13) or interventricular (n = 9) septal defect. Calculations were based on echographic measurements of aortic and pulmonary orifice areas and on the integral of maximal aortic and pulmonary Doppler velocity curves. Section areas or the arteries, taken as being circular, were deduced from arterial diameter measurements effected above Valsalva's sinus. Doppler velocity curves were recorded at that level, looking for maximal velocities and assuming a flat velocity profile. Blood flow ratios evaluated from Doppler-echocardiography data were compared with data provided by oximetry and showed good correlations (r = 0.92; Y = 0.71x + 0.53; SEE = 0.24). Calculations by categories of lesions showed better results in patients with interatrial septal defect (r = 0.94; Y = 0.73x + 0.507; SEE = 0.22) than in patients with interventricular septal defect (r = 0.83; Y = 0.547x + 0.75; SEE = 0.25). The main difficulties encountered in measuring Doppler-echocardiography blood flow ratios concerned accurate measurement of pulmonary artery diameter, due to problems of lateral resolution, and accurate measurement of turbulent Doppler velocimetry curves. However, this new, non-invasive technique may be useful to determine the best indications for catheterization or even surgery. PMID:3134868

Dequeker, J L; Jimenez, M; Gosse, P; Roudaut, R; Pouydebat, P; Gonçalves do Nascimento, L; Emeriau, J P; Choussat, A

1988-03-01

43

[Systemic-pulmonary artery shunt using Golaski graft: trial for measurement of the shunt flow].  

PubMed

For the systemic-pulmonary artery shunt operation, the modified Blalock-Taussig shunt was the first choice for procedure in our institution. Since 1990, Golaski knitted Dacron graft (4 or 5 mm in diameter) was used for the prosthesis. Ex-vivo flow calibration of the electromagnetic flow meter (Nihon Koden, MFV-3100) to Golaski graft showed good correlation between the real flow and value measured by the electromagnetic flow meter. Shunt flow was measured in the consecutive clinical fifteen cases. The shunt flow per body surface area of the patient who required additional shunt operation was 721 ml/min/m2 and one patient in whom the congestive heart failure developed after the shunt operation, had the shunt flow of 3,022 ml/min/m2. The adequate shunt flow in these cases was ranged from 745 to 2,820 ml/min/m2 (mean +/- 1 SD, 1,490 +/- 587.8). Therefore we performed the systemic-pulmonary artery shunt operation using Golaski graft to get the shunt flow of 1,000 ml/min/m2 (approximately a third of cardiac index) for the guide of good results. PMID:7897896

Togo, T; Ito, T; Hata, M; Murata, S; Osaka, K; Komatsu, T; Tabayashi, K; Haneda, K; Mohri, T

1995-03-01

44

PULMONARY HEPATIC FLOW DISTRIBUTION IN TOTAL CAVOPULMONARY CONNECTIONS: EXTRA CARDIAC VS INTRA CARDIAC  

PubMed Central

Background Pulmonary arteriovenous malformations (PAVMs) can occur after the Fontan and are believed to be associated with disproportionate pulmonary distribution of hepatic venous effluent. We studied the impact of total cavo-pulmonary connection (TCPC) geometry and the effect of increased cardiac output (CO) on distribution of inferior vena caval (IVC) return to the lungs. Methods 10 Fontan patients – 5 with extra-cardiac (EC) and 5 with intra-cardiac (IC) configurations of the TCPC previously analyzed for power loss were processed for calculating the distribution of inferior vena caval return to the lungs (2nd order accuracy). One idealized TCPC was similarly analyzed under parametric variation of IVC offset and CO flow split Results Streaming of the IVC return in the idealized TCPC model was dependent on both IVC offset magnitude and CO flow split ratio. For patient-specific TCPCs, preferential streaming of the IVC return was directly proportional to CO flow split ratio in the IC type TCPCs (p < 0.0001). Preferential streaming in EC TCPCs correlated to the IVC offset (p<0.05) and did not correlate to CO flow split. Enhanced mixing in IC is speculated to explain the contrasting results. Exercising tends to reduce streaming towards LPA in IC, while for EC, exercising tends to equalize the streaming. Conclusions EC and IC TCPCs have inherently different streaming characteristics due to contrasting mixing characteristics owing to their geometric differences. PA diameters and IVC offsets may together determine hepatic flow streaming. PMID:20621314

Dasi, Lakshmi P.; Whitehead, Kevin; Pekkan, Kerem; de Zelicourt, Diane; Sundareswaran, Kartik; Kanter, Kirk; Fogel, Mark A.; Yoganathan, Ajit P.

2010-01-01

45

An in situ optical imaging system for measuring lipid uptake, vessel contraction, and lymph flow in small animal lymphatic vessels  

NASA Astrophysics Data System (ADS)

All dietary lipids are transported to venous circulation through the lymphatic system, yet the underlying mechanisms that regulate this process remain unclear. Understanding how the lymphatics functionally respond to changes in lipid load is important in the diagnosis and treatment of lipid and lymphatic related diseases such as obesity, hypercholesterolemia, and lymphedema. Therefore, we sought to develop an in situ imaging system to quantify and correlate lymphatic function as it relates to lipid transport. A custom-built optical set-up provides us with the capability of dual-channel imaging of both high-speed bright-field video and fluorescence simultaneously. This is achieved by dividing the light path into two optical bands. Utilizing high-speed and back-illuminated CCD cameras and post-acquisition image processing algorithms, we have the potential quantify correlations between vessel contraction, lymph flow and lipid concentration of mesenteric lymphatic vessels in situ. Local flow velocity is measured through lymphocyte tracking, vessel contraction through measurements of the vessel walls and lipid uptake through fluorescence intensity tracking of a fluorescent long chain fatty acid analogue, Bodipy FL C16. This system will prove to be an invaluable tool for both scientists studying lymphatic function in health and disease, and those investigating strategies for targeting the lymphatic system with orally delivered drugs.

Kassis, Timothy; Weiler, Michael J.; Dixon, J. Brandon

2012-03-01

46

Numerical simulation of blood flow and pressure drop in the pulmonary arterial and venous circulation  

PubMed Central

A novel multiscale mathematical and computational model of the pulmonary circulation is presented and used to analyse both arterial and venous pressure and flow. This work is a major advance over previous studies by Olufsen and coworkers (Ottesen et al., 2003; Olufsen et al., 2012) which only considered the arterial circulation. For the first three generations of vessels within the pulmonary circulation, geometry is specified from patient-specific measurements obtained using magnetic resonance imaging (MRI). Blood flow and pressure in the larger arteries and veins are predicted using a nonlinear, cross-sectional-area-averaged system of equations for a Newtonian fluid in an elastic tube. Inflow into the main pulmonary artery is obtained from MRI measurements, while pressure entering the left atrium from the main pulmonary vein is kept constant at the normal mean value of 2 mmHg. Each terminal vessel in the network of ‘large’ arteries is connected to its corresponding terminal vein via a network of vessels representing the vascular bed of smaller arteries and veins. We develop and implement an algorithm to calculate the admittance of each vascular bed, using bifurcating structured trees and recursion. The structured-tree models take into account the geometry and material properties of the ‘smaller’ arteries and veins of radii ? 50µm. We study the effects on flow and pressure associated with three classes of pulmonary hypertension expressed via stiffening of larger and smaller vessels, and vascular rarefaction. The results of simulating these pathological conditions are in agreement with clinical observations, showing that the model has potential for assisting with diagnosis and treatment of circulatory diseases within the lung. PMID:24610385

Qureshi, M. Umar; Vaughan, Gareth D.A.; Sainsbury, Christopher; Johnson, Martin; Peskin, Charles S.; Olufsen, Mette S.; Hill, N.A.

2014-01-01

47

Numerical simulation of blood flow and pressure drop in the pulmonary arterial and venous circulation.  

PubMed

A novel multiscale mathematical and computational model of the pulmonary circulation is presented and used to analyse both arterial and venous pressure and flow. This work is a major advance over previous studies by Olufsen et al. (Ann Biomed Eng 28:1281-1299, 2012) which only considered the arterial circulation. For the first three generations of vessels within the pulmonary circulation, geometry is specified from patient-specific measurements obtained using magnetic resonance imaging (MRI). Blood flow and pressure in the larger arteries and veins are predicted using a nonlinear, cross-sectional-area-averaged system of equations for a Newtonian fluid in an elastic tube. Inflow into the main pulmonary artery is obtained from MRI measurements, while pressure entering the left atrium from the main pulmonary vein is kept constant at the normal mean value of 2 mmHg. Each terminal vessel in the network of 'large' arteries is connected to its corresponding terminal vein via a network of vessels representing the vascular bed of smaller arteries and veins. We develop and implement an algorithm to calculate the admittance of each vascular bed, using bifurcating structured trees and recursion. The structured-tree models take into account the geometry and material properties of the 'smaller' arteries and veins of radii ? 50 ?m. We study the effects on flow and pressure associated with three classes of pulmonary hypertension expressed via stiffening of larger and smaller vessels, and vascular rarefaction. The results of simulating these pathological conditions are in agreement with clinical observations, showing that the model has potential for assisting with diagnosis and treatment for circulatory diseases within the lung. PMID:24610385

Qureshi, M Umar; Vaughan, Gareth D A; Sainsbury, Christopher; Johnson, Martin; Peskin, Charles S; Olufsen, Mette S; Hill, N A

2014-10-01

48

Spatial distribution of pulmonary blood flow in dogs in increased force environments  

NASA Technical Reports Server (NTRS)

Spatial distribution of pulmonary blood flow during 2- to 3-min exposures to 6-8 Gy acceleration was studied, using radioactive microspheres in dogs, and compared to previously reported 1 Gy control distributions. Isotope distributions were measured by scintiscanning individual 1-cm-thick cross sections of excised, fixed lungs. Results indicate: (1) the fraction of cardiac output traversing left and right lungs did not change systematically with the duration and magnitude of acceleration; but (2) the fraction is strongly affected by the occurrence or absence of fast deep breaths, which cause an increase or decrease, respectively, in blood flow through the dependent lung; and (3) Gy acceleration caused a significant increase in relative pulmonary vascular resistance (PVR) in nondependent and dependent regions of the lung concurrent with a decrease in PVR in the midsagittal region of the thorax.

Greenleaf, J. F.; Ritman, E. L.; Chevalier, P. A.; Sass, D. J.; Wood, E. H.

1978-01-01

49

Frequency of Lymph Node Metastasis According to the Size of Tumors in Resected Pulmonary Adenocarcinoma with a Size of 30 mm or Smaller  

PubMed Central

Background: This study analyzed the relation between the tumor size and the lymph node metastasis in adenocarcinoma of the lung with a size of 30 mm or smaller. Methods: Four hundred thirteen patients who had undergone curative resection for lung adenocarcinoma were enrolled. If the tumor presented ground-glass opacities on the preoperative high-resolution computed tomography, both the total size including ground-glass opacities and the solid size alone were measured. To calculate the rates of lymph node metastasis by the tumor size, the tumors were divided into six groups by their sizes: 5 mm or less, 6 to 10 mm, 11 to 15 mm, 16 to 20 mm, 21 to 25 mm, and 26 to 30 mm. Results: The average numbers of dissected lymph nodes and dissected lymph node stations were 17 and 5, respectively. Seventy-five patients (18%) were postoperatively discovered to have positive nodes. The rates of node metastasis in each total size group were 0/1 (0%), 0/29 (0%), 5/77 (7%), 17/121 (14%), 27/101 (27%), and 26/84 (31%), respectively. The rates of node metastasis in each solid size group were 0/37 (0%), 1/53 (2%), 9/88 (10%), 17/104 (16%), 23/78 (30%), and 25/53 (47%), respectively. The area under the curve of receiver operating characteristic curves for the total size was measured as 0.701, and that for the solid size was measured as 0.777. By multivariate analysis, solid size, maximum standardized uptake value, and lymphovascular invasion were independent significant predictive factors. Conclusions: Solid size, maximum standardized uptake value, and lymphovascular invasion were independent predictors for lymph node metastasis of lung adenocarcinoma. The size of the solid component explained the relation between the tumor size and the lymph node metastasis more accurately than that explained by the total tumor size on high-resolution computed tomography. PMID:24787961

Seok, Yangki; Yang, Hee Chul; Kim, Tae Jung; Lee, Kyung Won; Kim, Kwhanmien; Jheon, Sanghoon

2014-01-01

50

The role of respiratory flow asynchrony on convective mixing in the pulmonary acinus  

NASA Astrophysics Data System (ADS)

Fine aerosol transport in the alveolated regions of the lungs is intrinsically coupled to alveolar flow patterns driven by lung breathing motions. Hence, understanding acinar flow characteristics is critical in determining local aerosol deposition sites. To date, inhaled aerosol dynamics have been mainly investigated using self-similar expanding lung models, although it is known that anisotropic lung motions exist and thus, potentially alter flow characteristics and enhance convective mixing. Using both experimental and numerical approaches, we assess here the influence of respiratory flow asynchrony on convective mixing by investigating alveolar flow patterns and massless particle transport for increasing phase lags between local wall motion and acinar ductal flows. Experimental results using a microfluidic platform, as well as numerical simulations, suggest that alveolar flow patterns are time-dependent in contrast to quasi-steady phenomena that pertain under synchronous conditions. To capture statistics of convective mixing, we numerically track massless tracers over multiple breathing cycles using anatomically inspired models of alveolated airways. By systemically probing various degrees of phase lag, our results underline the strong correlation between the magnitude of particle dispersion and flow asynchrony. In particular, we find that the dispersion of massless particles in acinar ducts is dramatically increased under flow asynchrony, relative to local, isolated alveolar cavity mixing. Despite the simplicity of the present models, our work highlights the critical role of respiratory flow asynchrony in governing the fate of fine inhaled particles in the pulmonary acinus.

Hofemeier, Philipp; Fishler, Rami; Sznitman, Josué

2014-08-01

51

Lymph Nodes  

MedlinePLUS

... Citation Help Home » Cancer Registration & Surveillance Modules » Anatomy & Physiology » Lymphatic System » Components of the Lymphatic System » Lymph Nodes Cancer Registration & Surveillance Modules Anatomy & Physiology Intro to the Human Body Body Functions & Life ...

52

In situ enhancement of pulmonary surfactant function using temporary flow reversal  

PubMed Central

Acute respiratory distress syndrome is a pulmonary disease with a mortality rate of ?40% and 75,000 deaths annually in the United States. Mechanical ventilation restores airway patency and gas transport but leads to ventilator-induced lung injury. Furthermore, surfactant replacement therapy is ineffective due to surfactant delivery difficulties and deactivation by vascular proteins leaking into the airspace. Here, we demonstrated that surfactant function can be substantially improved (up to 50%) in situ in an in vitro pulmonary airway model using unconventional flows that incorporate a short-term retraction of the air-liquid interface, leading to a net decrease in cellular damage. Computational fluid dynamic simulations provided insights into this method and demonstrated the physicochemical hydrodynamic foundation for the improved surfactant microscale transport and mobility. This study may provide a starting point for developing novel ventilation waveforms to improve surfactant function in edematous airways. PMID:21998268

Glindmeyer, Henry W.; Smith, Bradford J.

2012-01-01

53

Biodegradable radiopaque microspheres for the evaluation of regional pulmonary blood flow distribution using electron-beam computed tomography  

NASA Astrophysics Data System (ADS)

Accurate measurement of regional pulmonary blood flow distribution is of interest both as a research and diagnostic tool. Measurements of regional pulmonary perfusion via x-ray CT offer the possibility of detecting perfusion deficits due to pulmonary embolus while maintaining a high degree of anatomic detail. Use of bolus injection of conventional radiopaque contrast with associated short mean transit times (5 - 7 seconds), requires a high degree of temporal resolution offered clinically only by electron beam x-ray CT (Imatron). The present study was intended to characterize biodegradable radiopaque microspheres as an alternative contrast agent which would allow for measurement of regional pulmonary blood flow with scanning times associated with conventional or spiral thin slice, volumetric x-ray CT protocols. To test this, a dog was scanned at 6 slice levels and 13 time points with image acquisition gated to the cardiac cycle. Lung volumes were maintained at functional residual capacity.

Workman, Michael J.; Tajik, Jehangir K.; Robinson, Miguel T.; Hoffman, Eric A.

1994-05-01

54

Myocardial Flow Reserve in Long-Term Survivors of Repair of Anomalous Left Coronary Artery From Pulmonary Artery  

Microsoft Academic Search

Objectives. This study sought to evaluate regional myocardial flow reserve in long-term survivors of repair of anomalous left coronary artery from pulmonary artery (ALCAPA) and to relate the flow abnormalities to the patients' exercise performance. Background. Patients with ALCAPA usually present during infancy with severe ischemic cardiomyopathy. The left ventricular function recovers after surgical repair. However, the extent of recovery

TAJINDER P. SINGH; MARCELO F. DI CARLI; NANCY M. SULLIVAN; MARLO F. LEONEN; W. ROBERT MORROW

55

Myocardial Flow Reserve in Long-Term Survivors of Repair of Anomalous Left Coronary Artery From Pulmonary Artery  

Microsoft Academic Search

Objectives. This study sought to evaluate regional myocardial flow reserve in long-term survivors of repair of anomalous left coronary artery from pulmonary artery (ALCAPA) and to relate the flow abnormalities to the patients’ exercise performance.Background. Patients with ALCAPA usually present during infancy with severe ischemic cardiomyopathy. The left ventricular function recovers after surgical repair. However, the extent of recovery of

Tajinder P Singh; Marcelo F Di Carli; Nancy M Sullivan; Marlo F Leonen; W. Robert Morrow

1998-01-01

56

Nasal nitric oxide and regulation of human pulmonary blood flow in the upright position.  

PubMed

There are a number of evidences suggesting that lung perfusion distribution is under active regulation and determined by several factors in addition to gravity. In this work, we hypothesised that autoinhalation of nitric oxide (NO), produced in the human nasal airways, may be one important factor regulating human lung perfusion distribution in the upright position. In 15 healthy volunteers, we used single-photon emission computed tomography technique and two tracers (99mTc and 113mIn) labeled with human macroaggregated albumin to assess pulmonary blood flow distribution. In the sitting upright position, subjects first breathed NO free air through the mouth followed by the administration of the first tracer. Subjects then switched to either nasal breathing or oral breathing with the addition of exogenous NO-enriched air followed by the administration of the second tracer. Compared with oral breathing, nasal breathing induced a blood flow redistribution of approximately 4% of the total perfusion in the caudal to cranial and dorsal to ventral directions. For low perfused lung regions like the apical region, this represents a net increase of 24% in blood flow. Similar effects were obtained with the addition of exogenous NO during oral breathing, indicating that NO and not the breathing condition was responsible for the blood flow redistribution. In conclusion, these results provide evidence that autoinhalation of endogenous NO from the nasal airways may ameliorate the influence of gravity on pulmonary blood flow distribution in the upright position. The presence of nasal NO only in humans and higher primates suggest that it may be an important part of the adaptation to bipedalism. PMID:19875719

Sánchez Crespo, Alejandro; Hallberg, Jenny; Lundberg, Jon O; Lindahl, Sten G E; Jacobsson, Hans; Weitzberg, Eddie; Nyrén, Sven

2010-01-01

57

The acute effects of low flow oxygen and isosorbide dinitrate on left and right ventricular ejection fractions in chronic obstructive pulmonary disease  

SciTech Connect

The objectives of this study were to determine the effects of low flow oxygen and isosorbide dinitrate on rest and exercise biventricular ejection fractions in patients with chronic obstructive pulmonary disease and to relate these ejection fraction responses to changes in pressure and flow. Nine patients with stable, moderate to severe chronic obstructive pulmonary disease who had no prior history of heart failure performed supine exercise with simultaneous hemodynamic and radionuclide ventriculographic monitoring. Eight patients performed a second exercise during low flow oxygen breathing and five performed a third exercise after ingesting 10 mg oral isosorbide. Oxygen led to a decrease in exercise pulmonary artery pressure in all subjects and a decline in total pulmonary resistance in five of the seven in whom it was measured. Right ventricular ejection fraction increased 0.05 or more only in subjects who had a decrease in total pulmonary resistance. Isosorbide led to an increase in rest and exercise right and left ventricular ejection fractions with simultaneous decreases in pulmonary artery pressure, total pulmonary resistance, blood pressure and arterial oxygen tension. These results suggest that in patients with chronic obstructive pulmonary disease but without a history of right heart failure, the right ventricular systolic functional response to low flow oxygen and isosorbide at rest and exercise is, in part, determined by changes in total pulmonary resistance. The chronic relation between right ventricular ejection fraction and pulmonary hemodynamics in patients with chronic obstructive pulmonary disease remains to be evaluated.

Morrison, D.; Caldwell, J.; Lakshminaryan, S.; Ritchie, J.L.; Kennedy, J.W.

1983-10-01

58

Lymph node biopsy  

MedlinePLUS

Biopsy - lymph nodes; Open lymph node biopsy; Fine needle aspiration biopsy; Sentinel lymph node biopsy ... A lymph node biopsy is done in an operating room in a hospital. Or, it is done at an outpatient surgical center. The ...

59

Acinus-on-a-chip: a microfluidic platform for pulmonary acinar flows.  

PubMed

Convective respiratory flows in the pulmonary acinus and their influence on the fate of inhaled particles are typically studied using computational fluid dynamics (CFD) or scaled-up experimental models. However, experiments that replicate several generations of the acinar tree while featuring cyclic wall motion have not yet been realized. Moreover, current experiments generally capture only flow dynamics, without inhaled particle dynamics, due to difficulties in simultaneously matching flow and particle dynamics. In an effort to overcome these limitations, we introduce a novel microfluidic device mimicking acinar flow characteristics directly at the alveolar scale. The model features an anatomically-inspired geometry that expands and contracts periodically with five dichotomously branching airway generations lined with alveolar-like cavities. We use micro-particle image velocimetry with a glycerol solution as the carrying fluid to quantitatively characterize detailed flow patterns within the device and reveal experimentally for the first time a gradual transition of alveolar flow patterns along the acinar tree from recirculating to radial streamlines, in support of hypothesized predictions from past CFD simulations. The current measurements show that our microfluidic system captures the underlying characteristics of the acinar flow environment, including Reynolds and Womersley numbers as well as cyclic wall displacements and alveolar flow patterns at a realistic length scale. With the use of air as the carrying fluid, our miniaturized platform is anticipated to capture both particle and flow dynamics and serve in the near future as a promising in vitro tool for investigating the mechanisms of particle deposition deep in the lung. PMID:24090494

Fishler, Rami; Mulligan, Molly K; Sznitman, Josué

2013-11-15

60

The effect of maternal betamethasone administration on Doppler flow velocity parameters of the fetal branch pulmonary artery.  

PubMed

To investigate the effects of antenatal betamethasone on fetal pulmonary blood flow velocity waveforms. The study comprised 28 women with singleton pregnancies at high risk for preterm delivery. They were treated with two doses of 12 mg betamethasone intramuscularly 24 h apart to enhance lung maturity. Flow velocity waveforms were recorded with Doppler ultrasound from the middle segment of pulmonary artery (PA). Compared with the pretreatment mean value, a significant decrease in the pulmonary artery pulsatility (PI) and the resistance indexes (RI) was noted at 24 h and 48 h after the administration of first dose of betamethasone (p = 0.022 and p = 0.018 for PI and p = 0.001 and p = 0.004 for RI, respectively). After 7 days, the pulmonary artery velocity waveforms returned to the types of waveform observed before treatment (p = 0.216 for PI and p = 0.249 for RI). Maternal antenatal betamethasone resulted in a significant transient decrease in the pulsatility and the resistance indexes in the pulmonary artery. These findings indicate a direct effect of betamethasone on fetal pulmonary circulation. PMID:24830337

Ustunyurt, O B; Ustunyurt, E; Korkmazer, E; Altug, N; Bilge, U; Danisman, N

2014-08-01

61

Significance of pulmonary artery size and blood flow as a predictor of outcome in congenital diaphragmatic hernia  

Microsoft Academic Search

Aim  To determine if pulmonary artery size and blood flow have prognostic value in congenital diaphragmatic hernia (CDH).\\u000a \\u000a \\u000a \\u000a Methods  Twenty-eight consecutive left-sided CDH patients treated according to a standard protocol with high frequency oscillatory\\u000a ventilation (HFOV) + nitric oxide (NO) had right and left pulmonary artery (RPA, LPA) diameters, LPA\\/RPA diameter (L\\/R) ratios,\\u000a and PA blood flows examined by echocardiography (EC) on days 0,

Tadaharu Okazaki; Manabu Okawada; Satoko Shiyanagi; Hiromichi Shoji; Toshiaki Shimizu; Toshitaka Tanaka; Satoru Takeda; Kazunari Kawashima; Atsuyuki Yamataka

2008-01-01

62

Relation of systemic-to-pulmonary artery collateral flow in single ventricle physiology to palliative stage and clinical status.  

PubMed

Systemic-to-pulmonary collateral arteries (SPCs) are common in patients with single-ventricle physiology, but their impact on clinical outcomes is unclear. The aim of this study was to use retrospective cardiac magnetic resonance data to determine the relation between SPC flow and palliative stage and clinical status in single-ventricle physiology. Of 116 patients, 78 were after Fontan operation (median age 19 years) and 38 were at an earlier palliative stage (median age 2 years). SPC flow was quantified as aortic flow minus total caval flow or total pulmonary vein flow minus total branch pulmonary artery flow. Median SPC flow/body surface area (BSA) was higher in the pre-Fontan group (1.06 vs 0.43 L/min/m(2), p <0.0001) and decreased nonlinearly with increasing age after the Fontan operation (r(2) = 0.17, p <0.0001). In the Fontan group, patients in the highest quartile of SPC flow had larger ventricular end-diastolic volume/BSA (p <0.0001) and were older at the time of Fontan surgery (p = 0.04), but SPC flow/BSA was not associated with heart failure symptoms, atrial or ventricular arrhythmias, atrioventricular valve regurgitation, the ventricular ejection fraction, or peak oxygen consumption. In multivariate analysis of all patients (n = 116), higher SPC flow was independently associated with pre-Fontan status, unilateral branch pulmonary artery stenosis, a diagnosis of hypoplastic left-heart syndrome, and previous catheter occlusion of SPCs (model r(2) = 0.37, p <0.0001). In conclusion, in this cross-sectional study of single-ventricle patients, BSA-adjusted SPC flow was highest in pre-Fontan patients and decreased after the Fontan operation with minimal clinical correlates aside from ventricular dilation. PMID:22221948

Prakash, Ashwin; Rathod, Rahul H; Powell, Andrew J; McElhinney, Doff B; Banka, Puja; Geva, Tal

2012-04-01

63

Disruption of Endothelial Cell Mitochondrial Bioenergetics in Lambs with Increased Pulmonary Blood Flow  

PubMed Central

Abstract Aims: The mitochondrial dysfunction in our lamb model of congenital heart disease with increased pulmonary blood flow (PBF) (Shunt) is associated with disrupted carnitine metabolism. Our recent studies have also shown that asymmetric dimethylarginine (ADMA) levels are increased in Shunt lambs and ADMA increases the nitration of mitochondrial proteins in lamb pulmonary arterial endothelial cells (PAEC) in a nitric oxide synthase (NOS)-dependent manner. Thus, we determined whether there was a mechanistic link between endothelial nitric oxide synthase (eNOS), ADMA, and the disruption of carnitine homeostasis in PAEC. Results: Exposure of PAEC to ADMA induced the redistribution of eNOS to the mitochondria, resulting in an increase in carnitine acetyl transferase (CrAT) nitration and decreased CrAT activity. The resulting increase in acyl-carnitine levels resulted in mitochondrial dysfunction and the disruption of mitochondrial bioenergetics. Since the addition of l-arginine prevented these pathologic changes, we examined the effect of l-arginine supplementation on carnitine homeostasis, mitochondrial function, and nitric oxide (NO) signaling in Shunt lambs. We found that the treatment of Shunt lambs with l-arginine prevented the ADMA-mediated mitochondrial redistribution of eNOS, the nitration-mediated inhibition of CrAT, and maintained carnitine homeostasis. In turn, adenosine-5?-triphosphate levels and eNOS/heat shock protein 90 interactions were preserved, and this decreased NOS uncoupling and enhanced NO generation. Innovation: Our data link alterations in cellular l-arginine metabolism with the disruption of mitochondrial bioenergetics and implicate altered carnitine homeostasis as a key player in this process. Conclusion: l-arginine supplementation may be a useful therapy to prevent the mitochondrial dysfunction involved in the pulmonary vascular alterations secondary to increased PBF. Antioxid. Redox Signal. 18, 1739–1752. PMID:23244702

Sharma, Shruti; Fratz, Sohrab; Kumar, Sanjiv; Rafikov, Ruslan; Aggarwal, Saurabh; Rafikova, Olga; Lu, Qing; Burns, Tantiana; Dasarathy, Sridevi; Wright, Johnny; Schreiber, Christian; Radman, Monique; Fineman, Jeffrey R.

2013-01-01

64

Facts about Pulmonary Atresia  

MedlinePLUS

... In babies with this defect, blood has trouble flowing to the lungs to pick up oxygen for ... the pulmonary valve that usually controls the blood flowing through the pulmonary artery is not formed, so ...

65

Phase-contrast MRI and CFD modeling of apparent ³He gas flow in rat pulmonary airways.  

PubMed

Phase-contrast (PC) magnetic resonance imaging (MRI) with hyperpolarized ³He is potentially useful for developing and testing patient-specific models of pulmonary airflow. One challenge, however, is that PC-MRI provides apparent values of local ³He velocity that not only depend on actual airflow but also on gas diffusion. This not only blurs laminar flow patterns in narrow airways but also introduces anomalous airflow structure that reflects gas-wall interactions. Here, both effects are predicted in a live rat using computational fluid dynamics (CFD), and for the first time, simulated patterns of apparent ³He gas velocity are compared with in vivo PC-MRI. Results show (1) that correlations (R²) between measured and simulated airflow patterns increase from 0.23 to 0.79 simply by accounting for apparent ³He transport, and (2) that remaining differences are mainly due to uncertain airway segmentation and partial volume effects stemming from relatively coarse MRI resolution. Higher-fidelity testing of pulmonary airflow predictions should therefore be possible with future imaging improvements. PMID:22771528

Minard, Kevin R; Kuprat, Andrew P; Kabilan, Senthil; Jacob, Richard E; Einstein, Daniel R; Carson, James P; Corley, Richard A

2012-08-01

66

Lymph drainage from the ovine tonsils: an anatomical study of the tonsillar lymph vessels.  

PubMed

Although the tonsils of sheep have gained much attention during the last decade, only few data are available on their lymph vessel architecture. Tonsillar lymph vessels are immunologically important as they form the efferent routes for locally activated immune cells to reach the draining lymph nodes. To gain insight into the tonsillar lymph drainage in the sheep, Indian ink and a casting polymer were injected into the interstitium of the five tonsils present in the heads of slaughtered sheep. This enabled us to determine the draining lymph node and to examine the microscopic organization of lymph vessels using light and scanning electron microscopy. No lymph vessels were observed within the tonsillar lymphoid follicles. The corrosion casts demonstrated that the lymphoid follicles are surrounded by numerous sacculated lymph sinuses that drain into a dense interfollicular lymph vessel network. From here, the lymph flows into single small lymph vessels that in turn drain into larger lymph vessels extending towards the medial retropharyngeal lymph node. The presented results can be valuable for immunological studies, for example during oral or intranasal vaccine development. PMID:24597835

Casteleyn, C; Cornillie, P; Van Ginneken, C; Simoens, P; Van Cruchten, S; Vandevelde, K; Van den Broeck, W

2014-12-01

67

Non-invasive estimation of pulmonary vascular resistance in patients of pulmonary hypertension in congenital heart disease with unobstructed pulmonary flow  

PubMed Central

Context: Pulmonary vascular resistance (PVR) is a critical and essential parameter during the assessment and selection of modality of treatment in patients with congenital heart disease accompanied by pulmonary arterial hypertension. Aim: The present study was planned to evaluate non-invasive echocardiographic parameters to assess pulmonary vascular resistance. Settings and Design: This prospective observational study included 44 patients admitted in the cardiology and pediatric cardiology ward of our institution for diagnostic or pre-operative catheter based evaluation of pulmonary arterial pressure and PVR. Materials and Methods: Detailed echocardiographic evaluation was carried out including tricuspid regurgitation velocity (TRV) and velocity time integral of the right-ventricular outflow tract (VTIRVOT). These parameters were correlated with catheter-based measurements of PVR. Results: The TRV/VTIRVOT ratio correlated well with PVR measured at catheterization (PVRcath) (r = 0.896, 95% confidence interval [CI] 0.816 to 0.9423, P < 0.001). Using the Bland-Altman analysis, PVR measurements derived from Doppler data showed satisfactory limits of agreement with catheterization estimated PVR. For a PVR of 6 Wood units (WU), a TRV/VTIRVOT value of 0.14 provided a sensitivity of 96.67% and a specificity of 92.86% (area under the curve 0.963, 95% confidence interval 0.858 to 0.997) and for PVR of 8 WU a TRV/VTIRVOT value of 0.17 provided a sensitivity of 79.17% and a specificity of 95% (area under the curve 0. 0.923, 95% confidence interval 0.801 to 0.982). Conclusions: Doppler-derived ratio of TRV/VTIRVOT is a simple, non-invasive index, which can be used to estimate PVR. PMID:24987253

Pande, Arindam; Sarkar, Achyut; Ahmed, Imran; Naveen Chandra, GS; Patil, Shailesh Kumar; Kundu, Chanchal Kumar; Arora, Rahul; Samanta, Ajanta

2014-01-01

68

Recent Advance in Lymph Dynamic Analysis in Lymphatics and Lymph Nodes  

PubMed Central

Lymphatics are a unidirectional transport system that carries fluid from the interstitial space and back into the blood stream. Initial lymphatics take up not only fluid but also high-molecular-weight substances, such as plasma proteins and hyaluronan; immune cells, such as lymphocytes, macrophages, and dendritic cells; and colloidal particles, such as carbon particles, bacteria, and tattoo dye. Interstitially injected colloidal particles are known to accumulate in the regional lymph nodes. This phenomenon is applied to find sentinel lymph nodes in cancer patients. Lymph flow rate and composition are influenced by interstitial fluid, lymphatic pump activity, and intra-lymphatic pressure. Lymph composition is changed during its flow downstream. In this review, the main focus is on the mechanisms of lymph formation at the initial lymphatics and lymph transport through the collecting lymphatics and lymph nodes. (*English Translation of J Jpn Coll Angiol, 2008, 48: 113-123.) PMID:23555523

2012-01-01

69

Secondary flow velocity patterns in a pulmonary artery model with varying degrees of valvular pulmonic stenosis: pulsatile in vitro studies.  

PubMed

The objective of this study was to characterize in detail the secondary flow velocity patterns in an in vitro model of a human (adult) pulmonary artery with varying degrees of valvular pulmonic stenosis. A two-dimensional laser Doppler anemometer (LDA) system was used to map the flow fields in the main (MPA), left (LPA), and right (RPA) branches of the pulmonary artery model. The study was conducted in the Georgia Tech right heart pulse duplicator system. A pair of counter-rotating secondary flows were observed in each daughter branch in which the fluid moved outwardly along the side walls and then circled back inwardly toward the center of the vessel. For the case of the "normal" valve, the two counter-rotating secondary flows were symmetric about the centerline. The strength of secondary flows in the RPA was much stronger than in the LPA. However, as the pulmonic valve became more stenotic, the two counter-rotating secondary flows in both the LPA and RPA were no longer symmetric. In addition, the strength of secondary flows in both daughter branches increased with increasing degree of valvular stenosis. The increment in the LPA was, however, greater than in the RPA. The study demonstrates the importance of analyzing complex biological flows from a three-dimensional viewpoint. PMID:2308309

Sung, H W; Yoganathan, A P

1990-02-01

70

Exclusion of cytoplasmic fragments in flow cytometric analysis of lymph node samples from dogs with lymphoma using membrane-permeable violet laser-excitable DNA-binding fluorescent dye (DyeCycle Violet)  

PubMed Central

Background Cytoplasmic fragments derived from fragile neoplastic lymphocytes are common in samples of lymph nodes collected from dogs with lymphoma. These cytoplasmic fragments interfere with accurate gating of target cells and quantification protocols used for flow cytometry because of their variable size and expression of lymphoid cell surface antigens on their membranes. Objective The aim of this study was to develop a method to efficiently exclude cytoplasmic fragments from flow cytometric analysis of canine lymph nodes in which lymphoma was present. Methods Single-cell suspensions of neoplastic cells were prepared from biopsy samples and fine-needle aspirates of lymph nodes from 23 dogs with lymphoma. Suspensions were stained using a violet laser-excitable (405 nm) membrane-permeable DNA-binding fluorescent dye (DyeCycle Violet, DCV), incubated with antibodies against CD3, CD5, CD21, CD22, and CD45, and then stained with 7-amino-actinomycin D, an argon-excitable (488 nm) membrane-impermeable DNA-binding fluorescent dye. Multi-parameter flow cytometry was used for analysis based on selective uptake and laser-activated fluorescence of these dyes. Results Cytoplasmic fragments, which were DCV-negative and CD45-positive, and dead cells, which were positive for 7-amino-actinomycin D, were efficiently separated from neoplastic cells. Conclusion Staining with DyeCycle Violet is a useful method to improve flow cytometric gating methods and quantitative analyses of lymph node samples from dogs with lymphoma. PMID:21198735

Ito, Daisuke; O'Brien, Timothy D.; Modiano, Jaime F.

2011-01-01

71

Pulmonary blood flow measured by inspiratory inert gas concentration forcing oscillations.  

PubMed

The aim of this study was to discover if the forced inspired inert gas sinewave technique could be used to measure pulmonary blood flow, using nitrous oxide as the indicator gas, following inotropic stimulation of the heart by dobutamine, in the presence of a constant alveolar ventilation. Cardiac output (range 1-4.5 L min(-1)) was measured in six dogs by thermodilution and by calculation from the sinusoidal expired partial pressures of argon and nitrous oxide using: (i) analytical equations and a conventional continuous ventilation three-compartment lung model, which did not include recirculation; and (ii) a digital simulation tidal ventilation lung model (Gavaghan and Hahn, 1996. Respir. Physiol. 106, 209-221) which was adapted to include nitrous oxide mixed-venous recirculation from a combined single viscera compartment. The continuous ventilation model calculations always underestimated thermodilution cardiac output, with the bias error increasing to almost -1 L min(-1) at the longest forcing periods, 4-5 min. In contrast, the tidal ventilation model calculations were in close agreement to thermodilution cardiac output, with biases of -0.04 and -0.26 L min(-1) at forcing periods of 2 and 3 min, respectively. PMID:9776550

Williams, E M; Sainsbury, M C; Sutton, L; Xiong, L; Black, A M; Whiteley, J P; Gavaghan, D J; Hahn, C E

1998-07-01

72

Assessment of diastolic function by tissue Doppler echocardiography: comparison with standard transmitral and pulmonary venous flow  

NASA Technical Reports Server (NTRS)

The objective of this study was to determine the utility of Doppler tissue echocardiography in the evaluation of diastolic filling and in discriminating between normal subjects and those with various stages of diastolic dysfunction. We measured myocardial velocities in 51 patients with various stages of diastolic dysfunction and in 27 normal volunteers. The discriminating power of each of the standard Doppler indexes of left ventricular filling, pulmonary venous flow, and myocardial velocities was determined with the use of Spearman rank correlation and analysis of variance F statistics. Early diastolic myocardial velocity (E(m)) was higher in normal subjects (16.0 +/- 3.8 cm/s) than in patients with either delayed relaxation (n = 15, 7.5 +/- 2.2 cm/s), pseudonormal filling (n = 26, 7.6 +/- 2.3 cm/s), or restrictive filling (n = 10, 7.4 +/- 2.4 cm/s, P <.0001). E(m ) was the best single discriminator between control subjects and patients with diastolic dysfunction (P =.7, F = 64.5). Myocardial velocities assessed by Doppler tissue echocardiography are useful in differentiating patients with normal from those with abnormal diastolic function. Myocardial velocity remains reduced even in those stages of diastolic dysfunction characterized by increased preload compensation.

Farias, C. A.; Rodriguez, L.; Garcia, M. J.; Sun, J. P.; Klein, A. L.; Thomas, J. D.

1999-01-01

73

Pulmonary venous flows reflect changes in left atrial hemodynamics during mitral balloon valvotomy  

NASA Technical Reports Server (NTRS)

Patients with mitral stenosis have usually blunted pulmonary venous (PV) flow, because of decreased mitral valve area and diastolic dysfunction. The authors compared changes in Doppler PV velocities by using transesophageal echocardiography (TEE) against hemodynamics parameters before and after mitral balloon valvotomy to observe relevance of PV velocities and endsystolic left atrial (LA) pressure-volume relationship. In 25 patients (aged 35 +/- 17 years) with mitral stenosis in sinus rhythm, changes in LA pressure and volumes were compared with PV velocities before and after valvotomy. Mitral valve area, mitral gradients, and deceleration time were obtained. Mitral valve area and mitral gradients changed from 1 +/- 0.2 cm2 and 14.6 +/- 5.4 mmHg to 1.9 +/- 0.3 cm2 and 6.3 +/- 1.7 mmHg, respectively (p<0.001). AR peak reverse flow velocity and AR duration decreased from 29 +/- 13 cm/s and 110 =/- 30 msec to 19 +/- 6 cm/s and 80 +/- 29 msec respectively (p<0.001). Transmitral Doppler E wave deceleration time decreased from 327 +/- 85 to 209 +/- 61 s and cardiac output increased from 4.2 +/- 1.0 to 5.2 +/- 1.1 L/minute (p<0.001). The changes in LA pressure were correlated with changes in S/D (r=0.57, p<0.05). The changes in endsystolic LA pressure-volume relationship were also correlated with changes in S/D (r=0.52, p<0.05). Endsystolic LA pressure-volume relationship decreased after mitral balloon valvotomy, as a result of a large decrease in pressure. PV systolic/diastolic (S/D) waves ratio reflects endsystolic LA pressure-volume relationship and may be used as another indicator of successful valvotomy.

Yalcin, Fatih; El-Amrousy, Mahmoud; Muderrisoglu, Haldun; Korkmaz, Mehmet; Flachskampf, Frank; Tuzcu, Murat; Garcia, Mario G.; Thomas, James D.

2002-01-01

74

Noninvasive assessment of left atrial maximum dP/dt by a combination of transmitral and pulmonary venous flow  

NASA Technical Reports Server (NTRS)

OBJECTIVES: The study assessed whether hemodynamic parameters of left atrial (LA) systolic function could be estimated noninvasively using Doppler echocardiography. BACKGROUND: Left atrial systolic function is an important aspect of cardiac function. Doppler echocardiography can measure changes in LA volume, but has not been shown to relate to hemodynamic parameters such as the maximal value of the first derivative of the pressure (LA dP/dt(max)). METHODS: Eighteen patients in sinus rhythm were studied immediately before and after open heart surgery using simultaneous LA pressure measurements and intraoperative transesophageal echocardiography. Left atrial pressure was measured with a micromanometer catheter, and LA dP/dt(max) during atrial contraction was obtained. Transmitral and pulmonary venous flow were recorded by pulsed Doppler echocardiography. Peak velocity, and mean acceleration and deceleration, and the time-velocity integral of each flow during atrial contraction was measured. The initial eight patients served as the study group to derive a multilinear regression equation to estimate LA dP/dt(max) from Doppler parameters, and the latter 10 patients served as the test group to validate the equation. A previously validated numeric model was used to confirm these results. RESULTS: In the study group, LA dP/dt(max) showed a linear relation with LA pressure before atrial contraction (r = 0.80, p < 0.005), confirming the presence of the Frank-Starling mechanism in the LA. Among transmitral flow parameters, mean acceleration showed the strongest correlation with LA dP/dt(max) (r = 0.78, p < 0.001). Among pulmonary venous flow parameters, no single parameter was sufficient to estimate LA dP/dt(max) with an r2 > 0.30. By stepwise and multiple linear regression analysis, LA dP/dt(max) was best described as follows: LA dP/dt(max) = 0.1 M-AC +/- 1.8 P-V - 4.1; r = 0.88, p < 0.0001, where M-AC is the mean acceleration of transmitral flow and P-V is the peak velocity of pulmonary venous flow during atrial contraction. This equation was tested in the latter 10 patients of the test group. Predicted and measured LA dP/dt(max) correlated well (r = 0.90, p < 0.0001). Numerical simulation verified that this relationship held across a wide range of atrial elastance, ventricular relaxation and systolic function, with LA dP/dt(max) predicted by the above equation with r = 0.94. CONCLUSIONS: A combination of transmitral and pulmonary venous flow parameters can provide a hemodynamic assessment of LA systolic function.

Nakatani, S.; Garcia, M. J.; Firstenberg, M. S.; Rodriguez, L.; Grimm, R. A.; Greenberg, N. L.; McCarthy, P. M.; Vandervoort, P. M.; Thomas, J. D.

1999-01-01

75

Vertical Distributions of Pulmonary Diffusing Capacity and Capillary Blood Flow in Man  

PubMed Central

In six normal upright subjects, a 100 mol bolus—composed of equal parts of neon, carbon monoxide, and acetylene (Ne, CO, and C2H2)—was inspired from either residual volume (RV) or functional residual capacity (FRC) during a slow inspiration from RV to total lung capacity (TLC). After breath holding and subsequent collection of the exhalate, diffusing capacity and pulmonary capillary blood flow per liter of lung volume (DL/VA and Q?C/VA) were calculated from the rates of CO and C2H2 disappearances relative to Ne. The means: DL/VA = 5.26 ml/min × mm Hg per liter (bolus at RV), 6.54 ml/min × mm Hg per liter (at FRC); Q?C/VA 0.537 liters/minute per liter (bolus at RV), 0.992 liters/minute per liter (at FRC). Similar maneuvers using Xenon-133 confirmed that, during inspiration, more of the bolus goes to the upper zone if introduced at RV and more to the lower, if at FRC. A lung model has been constructed which describes how DL/VA and Q?C/VA must be distributed to satisfy the experimental data. According to this model, there is a steep gradient of Q?C/VA, increasing from apex to base, similar to that previously determined by other techniques—and also a gradient in the same direction, although not as steep, for DL/VA. This more uniform distribution of DL/VA compared with Q?C/VA indicates a vertical unevenness of diffusing capacity with respect to blood flow (DL/Q?C). However, the relative degree of vertical unevenness of DL/VA compared with Q?C/VA can account only in part for previous observations attributed to the inhomogeneity of DL/VA and Q?C/VA. Thus, a more generalized unevennes of these ratios must exist throughout the lung, independent of gravitation. Images PMID:4683876

Michaelson, Edward D.; Sackner, Marvin A.; Johnson, Robert L.

1973-01-01

76

Pulmonary venous flow determinants of left atrial pressure under different loading conditions in a chronic animal model with mitral regurgitation  

NASA Technical Reports Server (NTRS)

BACKGROUND: The aim of our study was to quantitatively compare the changes and correlations between pulmonary venous flow variables and mean left atrial pressure (mLAP) under different loading conditions in animals with chronic mitral regurgitation (MR) and without MR. METHODS: A total of 85 hemodynamic conditions were studied in 22 sheep, 12 without MR as control (NO-MR group) and 10 with MR (MR group). We obtained pulmonary venous flow systolic velocity (Sv) and diastolic velocity (Dv), Sv and Dv time integrals, their ratios (Sv/Dv and Sv/Dv time integral), mLAP, left ventricular end-diastolic pressure, and MR stroke volume. We also measured left atrial a, x, v, and y pressures and calculated the difference between v and y pressures. RESULTS: Average MR stroke volume was 10.6 +/- 4.3 mL/beat. There were good correlations between Sv (r = -0.64 and r = -0.59, P <.01), Sv/Dv (r = -0.62 and r = -0.74, P <.01), and mLAP in the MR and NO-MR groups, respectively. Correlations were also observed between Dv time integral (r = 0.61 and r = 0.57, P <.01) and left ventricular end-diastolic pressure in the MR and NO-MR groups. In velocity variables, Sv (r = -0.79, P <.001) was the best predictor of mLAP in both groups. The sensitivity and specificity of Sv = 0 in predicting mLAP 15 mm Hg or greater were 86% and 85%, respectively. CONCLUSION: Pulmonary venous flow variables correlated well with mLAP under altered loading conditions in the MR and NO-MR groups. They may be applied clinically as substitutes for invasively acquired indexes of mLAP to assess left atrial and left ventricular functional status.

Yang, Hua; Jones, Michael; Shiota, Takahiro; Qin, Jian Xin; Kim, Yong Jin; Popovic, Zoran B.; Pu, Min; Greenberg, Neil L.; Cardon, Lisa A.; Eto, Yoko; Sitges, Marta; Zetts, Arthur D.; Thomas, James D.

2002-01-01

77

[A case of pulmonary tumor thrombotic microangiopathy induced by early gastric cancer].  

PubMed

A 56-year-old man with chief complaints of dry cough and dyspnea was admitted. He had severe hypoxemia, and his chest radiographs showed enhancement of pulmonary artery opacities with multiple defects on pulmonary blood flow scintigraphy. Enhanced computed tomography (CT) revealed swelling of the mediastinum and hilar lymph nodes, but no apparent thrombi in the pulmonary arteries was seen. A biopsy specimen of a left neck lymph node showed poorly differentiated adenocarcinoma, including signet-ring cell carcinoma components, but the origin was unclear. Despite receiving chemotherapy, his respiratory condition worsened, and he died 3 days after admission. Routine autopsy failed to clarify the tumor origin, but a detailed dissection of specimens confirmed early gastric cancer. Additionally, pathology of the pulmonary arteries was compatible with pulmonary tumor thrombotic microangiopathy (PTTM). PTTM is a rare condition characterized by the presence of diffuse thrombotic microthrombi and fibrocellular intimal proliferation in the pulmonary vasculature. Accompanied with early gastric cancer, this is an extremely rare but important case of PTTM. PMID:21400909

Yasui, Hideki; Akamatsu, Taisuke; Nakamura, Yutarou; Inui, Naoki; Suda, Takafumi; Chida, Kingo; Meguro, Shiori; Baba, Satoshi

2011-02-01

78

Role of platelets in maintenance of pulmonary vascular permeability to protein  

SciTech Connect

The authors examined the role of platelets in maintenance of pulmonary vascular integrity by inducing thrombocytopenia in sheep using antiplatelet serum (APS). A causal relationship between thrombocytopenia and increase in pulmonary vascular permeability was established by platelet repletion using platelet-rich plasma (PRP). Sheep were chronically instrumented and lung lymph fistulas prepared to monitor pulmonary lymph flow (Q{sub lym}). A balloon catheter was positioned in the left atrium to assess pulmonary vascular permeability to protein after raising the left atrial pressure (P{sub la}). Thrombocytopenia was maintained for 3 days by daily intramuscular APS injections. In studies using cultured bovine pulmonary artery endothelial monolayers, transendothelia permeability of {sup 125}I-labeled albumin was reduced 50 and 95%, respectively, when 2.5 {times} 10{sup 7} or 5 {times} 10{sup 7} platelets were added onto endothelial monolayers. However, addition of 5 {times} 10{sup 6} platelets or 5 {times} 10{sup 7} red blood cells did not reduce endothelial monolayer albumin permeability. Results indicate that platelets are required for the maintenance of pulmonary vascular permeability. Reduction in permeability appears to involve an interaction of platelets with the endothelium.

Lo, S.K.; Burhop, K.E.; Kaplan, J.E.; Malik, A.B. (Albany Medical College of Union Univ., NY (USA))

1988-04-01

79

Giant high-flow type pulmonary arteriovenous malformation: coil embolization with flow control by balloon occlusion and an anchored detachable coil.  

PubMed

Pulmonary arteriovenous malformations (PAVMs) are often treated by pushable fibered or non-fibered microcoils, using an anchor or scaffold technique or with an Amplatzer plug through a guiding sheath. When performing percutaneous transcatheter microcoil embolization, there is a risk of coil migration, particularly with high-flow type PAVMs. The authors report on a unique treatment in a patient with a giant high-flow PAVM whose nidus had a maximum diameter of 6 cm. A detachable coil, not detached from a delivery wire (an anchored detachable coil), was first placed in the feeding artery under flow control by balloon occlusion, and then multiple microcoils were packed proximally to the anchored detachable coil. After confirming the stability of the microcoils during a gradual deflation of the balloon, we finally released the first detachable coil. The nidus was reduced in size to 15 mm at one year postoperatively. PMID:22247646

Kanematsu, Masayuki; Kondo, Hiroshi; Goshima, Satoshi; Tsuge, Yusuke; Watanabe, Haruo; Moriyama, Noriyuki

2012-01-01

80

Endothelial interactions of neutrophils under flow in chronic obstructive pulmonary disease  

Microsoft Academic Search

It is generally accepted that the neutrophil is central to the pathogenesis of chronic obstructive pulmonary disease (COPD). Enhanced endothelial interactions of this cell may contribute to the susceptibility of smokers who develop the disease; however, these interactions have not previously been studied in COPD. The aim of the current study was to determine whether enhanced endothelial interactions of neutrophils

I. S. Woolhouse; D. L. Bayley; P. Lalor; D. H. Adams; R. A. Stockley

2005-01-01

81

Pulmonary angiography  

MedlinePLUS

... narrowing of the pulmonary vessels Pulmonary artery aneurysms Pulmonary hypertension -- high blood pressure in the arteries of the ... the lungs (pulmonary embolism) Narrowed blood vessel Primary pulmonary hypertension Tumor in the lung

82

Detection of Invasive Pulmonary Aspergillosis in Haematological Malignancy Patients by using Lateral-flow Technology  

PubMed Central

Invasive pulmonary aspergillosis (IPA) is a leading cause of morbidity and mortality in haematological malignancy patients and hematopoietic stem cell transplant recipients1. Detection of IPA represents a formidable diagnostic challenge and, in the absence of a 'gold standard', relies on a combination of clinical data and microbiology and histopathology where feasible. Diagnosis of IPA must conform to the European Organization for Research and Treatment of Cancer and the National Institute of Allergy and Infectious Diseases Mycology Study Group (EORTC/MSG) consensus defining "proven", "probable", and "possible" invasive fungal diseases2. Currently, no nucleic acid-based tests have been externally validated for IPA detection and so polymerase chain reaction (PCR) is not included in current EORTC/MSG diagnostic criteria. Identification of Aspergillus in histological sections is problematic because of similarities in hyphal morphologies with other invasive fungal pathogens3, and proven identification requires isolation of the etiologic agent in pure culture. Culture-based approaches rely on the availability of biopsy samples, but these are not always accessible in sick patients, and do not always yield viable propagules for culture when obtained. An important feature in the pathogenesis of Aspergillus is angio-invasion, a trait that provides opportunities to track the fungus immunologically using tests that detect characteristic antigenic signatures molecules in serum and bronchoalveolar lavage (BAL) fluids. This has led to the development of the Platelia enzyme immunoassay (GM-EIA) that detects Aspergillus galactomannan and a 'pan-fungal' assay (Fungitell test) that detects the conserved fungal cell wall component (1 ?3)-?-D-glucan, but not in the mucorales that lack this component in their cell walls1,4. Issues surrounding the accuracy of these tests1,4-6 has led to the recent development of next-generation monoclonal antibody (MAb)-based assays that detect surrogate markers of infection1,5. Thornton5 recently described the generation of an Aspergillus-specific MAb (JF5) using hybridoma technology and its use to develop an immuno-chromatographic lateral-flow device (LFD) for the point-of-care (POC) diagnosis of IPA. A major advantage of the LFD is its ability to detect activity since MAb JF5 binds to an extracellular glycoprotein antigen that is secreted during active growth of the fungus only5. This is an important consideration when using fluids such as lung BAL for diagnosing IPA since Aspergillus spores are a common component of inhaled air. The utility of the device in diagnosing IPA has been demonstrated using an animal model of infection, where the LFD displayed improved sensitivity and specificity compared to the Platelia GM and Fungitell (1 ? 3)-?-D-glucan assays7. Here, we present a simple LFD procedure to detect Aspergillus antigen in human serum and BAL fluids. Its speed and accuracy provides a novel adjunct point-of-care test for diagnosis of IPA in haematological malignancy patients. PMID:22473419

Thornton, Christopher; Johnson, Gemma; Agrawal, Samir

2012-01-01

83

Anomalous origin of the left coronary artery from the pulmonary artery with proximal hypoplasia of the anomalous coronary artery: diagnostic value of the intercoronary collateral flow detected by color Doppler flow mapping  

Microsoft Academic Search

We describe a case of a child with anomalous origin of the left coronary artery from the pulmonary artery and proximal hypoplasia of the anomalous coronary artery, in whom the diagnosis was suggested only by the intercoronary collateral flow, detected by color Doppler flow mapping.

Enrico De Caro; Giacomo Pongiglione

1996-01-01

84

Total Cavopulmonary Connection Flow With Functional Left Pulmonary Artery Stenosis Angioplasty and Fenestration In Vitro  

Microsoft Academic Search

Background—In our multicenter study of the total cavopulmonary connection (TCPC), a cohort of patients with long-segment left pulmonary artery (LPA) stenosis was observed (35%). The clinically recognized detrimental effects of LPA stenosis motivated a computational fluid dynamic simulation study within 3-dimensional patient-specific and idealized TCPC pathways. The goal of this study was to quantify and evaluate the hemodynamic impact of

Kerem Pekkan; Hiroumi D. Kitajima; Diane de Zelicourt; Joseph M. Forbess; W. James Parks; Mark A. Fogel; Shiva Sharma; Kirk R. Kanter; David Frakes; Ajit P. Yoganathan

2010-01-01

85

Total and differential leucocyte counts and lymphocyte subpopulations in lymph, afferent and efferent to the supramammary lymph node, during endotoxin-induced bovine mastitis.  

PubMed

Leucocyte trafficking in afferent and efferent mammary lymph and the supramammary lymph node in cows was examined during 4 h after intramammary infusion of endotoxin from Escherichia coli. Total and differential leucocyte counts were measured in milk, blood and lymph. The proportions of CD4(+), CD8(+), major histocompatibility complex (MHC) class II(+) and IgM(+) lymphocytes were examined in the lymph and lymph node. At post-infusion hour (PIH) 4, the flow rates of both lymph fluids had increased approximately eightfold. Total leucocyte concentration increased in afferent lymph, but decreased in efferent lymph. Neutrophils increased in afferent lymph at PIH 2 and in efferent lymph and milk at PIH 4. The predominant cell type in afferent lymph shifted from lymphocyte to neutrophil while lymphocyte was still at PIH 4 the predominant type in efferent lymph. Among the lymphocytes, B cells were predominant in afferent lymph and lymph node at PIH 4 while T cells, mainly CD4(+) cells, were predominant in efferent lymph both at PIH 0 and PIH 4. The CD4 : CD8 ratio was higher in efferent lymph and the challenged lymph node than in afferent lymph and the control node, respectively. There was a significant difference in proportions of each lymphocyte subpopulation except for IgM(+) cells, between afferent and efferent lymph after infusion. According to the results, there was already during the first hours of the immune response, a non-random trafficking of neutrophils and lymphocyte subpopulations resulting in a changed distribution of cells in afferent and efferent lymph and a difference in lymphocyte reactivity between the two lymph fluids. PMID:17348968

Lun, S; Aström, G; Magnusson, U; Ostensson, K

2007-04-01

86

Phase-Contrast MRI and CFD Modeling of Apparent 3He Gas Flow in Rat Pulmonary Airways  

PubMed Central

Phase-contrast (PC) magnetic resonance imaging (MRI) with hyperpolarized 3He is potentially useful for developing and testing patient-specific models of pulmonary airflow. One challenge, however, is that PC-MRI provides apparent values of local 3He velocity that not only depend on actual airflow but also on gas diffusion. This not only blurs laminar flow patterns in narrow airways but also introduces anomalous airflow structure that reflects gas-wall interactions. Here, both effects are predicted in a live rat using computational fluid dynamics (CFD), and for the first time, simulated patterns of apparent 3He gas velocity are compared with in-vivo PC-MRI. Results show 1) that correlations (R2) between measured and simulated airflow patterns increase from 0.23 to 0.79 simply by accounting for apparent 3He transport, and 2) that remaining differences are mainly due to uncertain airway segmentation and partial volume effects stemming from relatively coarse MRI resolution. Higher-fidelity testing of pulmonary airflow predictions should therefore be possible with future imaging improvements. PMID:22771528

Minard, Kevin R.; Kuprat, Andrew P.; Kabilan, Senthil; Jacob, Richard E.; Einstein, Daniel R.; Carson, James P.; Corley, Richard A.

2012-01-01

87

Ovine model for studying pulmonary immune responses  

SciTech Connect

Anatomical features of the sheep lung make it an excellent model for studying pulmonary immunity. Four specific lung segments were identified which drain exclusively to three separate lymph nodes. One of these segments, the dorsal basal segment of the right lung, is drained by the caudal mediastinal lymph node (CMLN). Cannulation of the efferent lymph duct of the CMLN along with highly localized intrabronchial instillation of antigen provides a functional unit with which to study factors involved in development of pulmonary immune responses. Following intrabronchial immunization there was an increased output of lymphoblasts and specific antibody-forming cells in efferent CMLN lymph. Continuous divergence of efferent lymph eliminated the serum antibody response but did not totally eliminate the appearance of specific antibody in fluid obtained by bronchoalveolar lavage. In these studies localized immunization of the right cranial lobe served as a control. Efferent lymphoblasts produced in response to intrabronchial antigen were labeled with /sup 125/I-iododeoxyuridine and their migrational patterns and tissue distribution compared to lymphoblasts obtained from the thoracic duct. The results indicated that pulmonary immunoblasts tend to relocate in lung tissue and reappear with a higher specific activity in pulmonary lymph than in thoracic duct lymph. The reverse was observed with labeled intestinal lymphoblasts. 35 references, 2 figures, 3 tables.

Joel, D.D.; Chanana, A.D.

1984-11-25

88

[Comparison of flow-volume curve parameters in patients with respiratory sarcoidosis and chronic non-specific pulmonary diseases].  

PubMed

62 patients with respiratory sarcoidosis (RS) and 50 patients with chronic nonspecific pulmonary diseases (CNSPD) inhaled 1 ml (250 mg ipratronium bromide and 500 mcg phenoterol hydrobromide) berodual by means of nebulizer. 68% of the examinees responded with obstruction of the distal part of the respiratory tree. RS causes partially reversible defects in permeability, primarily at the level of small bronchi. Berodual-induced changes in the curve flow-volume in RS differed from those in CNSPD patients by the absence of a rise in the exhalation power. Lofgren's syndrome deteriorated reversibility of bronchial permeability defects in RS patients. Smoking effects on bronchial permeability and reversibility of relevant defects in RS patients were insignificant. Pathogenesis of reversible obstruction in sarcoidosis demands further studies. PMID:11759402

Vizel', A A; Valieva, L V; Guryleva, M E; Dmitriev, E G

2001-01-01

89

Progressive dysfunction of nitric oxide synthase in a lamb model of chronically increased pulmonary blood flow: a role for oxidative stress  

PubMed Central

Cardiac defects associated with increased pulmonary blood flow result in pulmonary vascular dysfunction that may relate to a decrease in bioavailable nitric oxide (NO). An 8-mm graft (shunt) was placed between the aorta and pulmonary artery in 30 late gestation fetal lambs; 27 fetal lambs underwent a sham procedure. Hemodynamic responses to ACh (1 ?g/kg) and inhaled NO (40 ppm) were assessed at 2, 4, and 8 wk of age. Lung tissue nitric oxide synthase (NOS) activity, endothelial NOS (eNOS), neuronal NOS (nNOS), inducible NOS (iNOS), and heat shock protein 90 (HSP90), lung tissue and plasma nitrate and nitrite (NOx), and lung tissue superoxide anion and nitrated eNOS levels were determined. In shunted lambs, ACh decreased pulmonary artery pressure at 2 wk (P < 0.05) but not at 4 and 8 wk. Inhaled NO decreased pulmonary artery pressure at each age (P < 0.05). In control lambs, ACh and inhaled NO decreased pulmonary artery pressure at each age (P < 0.05). Total NOS activity did not change from 2 to 8 wk in control lambs but increased in shunted lambs (ANOVA, P < 0.05). Conversely, NOx levels relative to NOS activity were lower in shunted lambs than controls at 4 and 8 wk (P < 0.05). eNOS protein levels were greater in shunted lambs than controls at 4 wk of age (P < 0.05). Superoxide levels increased from 2 to 8 wk in control and shunted lambs (ANOVA, P < 0.05) and were greater in shunted lambs than controls at all ages (P < 0.05). Nitrated eNOS levels were greater in shunted lambs than controls at each age (P < 0.05). We conclude that increased pulmonary blood flow results in progressive impairment of basal and agonist-induced NOS function, in part secondary to oxidative stress that decreases bioavailable NO. PMID:18757524

Oishi, Peter E.; Wiseman, Dean A.; Sharma, Shruti; Kumar, Sanjiv; Hou, Yali; Datar, Sanjeev A.; Azakie, Anthony; Johengen, Michael J.; Harmon, Cynthia; Fratz, Sohrab; Fineman, Jeffrey R.; Black, Stephen M.

2008-01-01

90

Assessment of pulmonary arterial hypertension and vascular resistance by measurements of the pulmonary arterial flow velocity curve in the absence of a measurable tricuspid regurgitant velocity in childhood congenital heart disease.  

PubMed

This study aimed to determine mean pulmonary arterial pressure (PAPmean) and pulmonary vascular resistance (PVR) using transthoracic echocardiography (TTE) measurements of the pulmonary artery flow velocity curve in children with pulmonary arterial hypertension (PAH) and congenital heart disease when the tricuspid regurgitant velocity (TRV) is not sufficient. This study enrolled 29 congenital heart disease cases with pulmonary arterial hypertension and 40 healthy subjects followed at our center. The mean age was 66.9 ± 77.9 months in the patient group and 76.3 ± 62.1 months in the control group. A positive correlation was found between TRV and systolic pulmonary arterial pressure (r = 0.394, p = 0.035, 95% confidence interval [CI] = 0.032-0.665), whereas a negative correlation was found between corrected acceleration time (AcTc) and PAPmean (r = -0.559, p = 0.002, 95% CI = -0.768 to -0.242). Furthermore, a negative correlation was found between parameters TRV and AcTc (r = -0.383, p = 0.001, 95% CI = -0.657 to -0.019). Based on the cutoff criterion of 124 ms for AcTc, sensitivity was found to be 79.3% and specificity to be 77.5% in distinguishing between the PAH patients and the healthy control patients (receiver operating characteristic [ROC] area under the curve [AUC] = 0.804, 95% CI = 0.691-0.890, p < 0.0001). The sensitivity and specificity of the concomitant use of AcTc and/or TRV were found to be 90 and 73%, respectively, in distinguishing between the PAH patients and the the healthy control patients. The data obtained by TTE also can be appropriate for measuring PAPmean, PVR, and the vasoreactivity test and for determining the priority of implementing cardiac catheterization even if there is no measurable TRV value. PMID:23052666

Cevik, Ayhan; Kula, Serdar; Olgunturk, Rana; Tunaoglu, F Sedef; Oguz, A Deniz; Saylan, Berna; Cilsal, Erman; Sanli, Cihat

2013-03-01

91

Preliminary evaluation of a fiber-optic sensor for flow measurements in pulmonary ventilators  

Microsoft Academic Search

A novel optical fiber air flow sensor was developed for monitoring flow rates supplied by infant ventilators. The device is based on a fiber optic sensing technique and overcomes some important shortcomings of biomedical applications, such as electromagnetic interference and possible electrical hazard. The sensing principle is based on measuring the displacement of an emitting optical fiber cantilever by means

Luigi Battista; Salvatore Andrea Sciuto; Andrea Scorza

2011-01-01

92

The value of assessing pulmonary venous flow velocity for predicting severity of mitral regurgitation: A quantitative assessment integrating left ventricular function  

NASA Technical Reports Server (NTRS)

Although alteration in pulmonary venous flow has been reported to relate to mitral regurgitant severity, it is also known to vary with left ventricular (LV) systolic and diastolic dysfunction. There are few data relating pulmonary venous flow to quantitative indexes of mitral regurgitation (MR). The object of this study was to assess quantitatively the accuracy of pulmonary venous flow for predicting MR severity by using transesophageal echocardiographic measurement in patients with variable LV dysfunction. This study consisted of 73 patients undergoing heart surgery with mild to severe MR. Regurgitant orifice area (ROA), regurgitant stroke volume (RSV), and regurgitant fraction (RF) were obtained by quantitative transesophageal echocardiography and proximal isovelocity surface area. Both left and right upper pulmonary venous flow velocities were recorded and their patterns classified by the ratio of systolic to diastolic velocity: normal (>/=1), blunted (<1), and systolic reversal (<0). Twenty-three percent of patients had discordant patterns between the left and right veins. When the most abnormal patterns either in the left or right vein were used for analysis, the ratio of peak systolic to diastolic flow velocity was negatively correlated with ROA (r = -0.74, P <.001), RSV (r = -0.70, P <.001), and RF (r = -0.66, P <.001) calculated by the Doppler thermodilution method; values were r = -0.70, r = -0.67, and r = -0.57, respectively (all P <.001), for indexes calculated by the proximal isovelocity surface area method. The sensitivity, specificity, and predictive values of the reversed pulmonary venous flow pattern for detecting a large ROA (>0.3 cm(2)) were 69%, 98%, and 97%, respectively. The sensitivity, specificity, and predictive values of the normal pulmonary venous flow pattern for detecting a small ROA (<0.3 cm(2)) were 60%, 96%, and 94%, respectively. However, the blunted pattern had low sensitivity (22%), specificity (61%), and predictive values (30%) for detecting ROA of greater than 0.3 cm(2) with significant overlap with the reversed and normal patterns. Among patients with the blunted pattern, the correlation between the systolic to diastolic velocity ratio was worse in those with LV dysfunction (ejection fraction <50%, r = 0.23, P >.05) than in those with normal LV function (r = -0.57, P <.05). Stepwise linear regression analysis showed that the peak systolic to diastolic velocity ratio was independently correlated with RF (P <.001) and effective stroke volume (P <.01), with a multiple correlation coefficient of 0.71 (P <.001). In conclusion, reversed pulmonary venous flow in systole is a highly specific and reliable marker of moderately severe or severe MR with an ROA greater than 0.3 cm(2), whereas the normal pattern accurately predicts mild to moderate MR. Blunted pulmonary venous flow can be seen in all grades of MR with low predictive value for severity of MR, especially in the presence of LV dysfunction. The blunted pulmonary venous flow pattern must therefore be interpreted cautiously in clinical practice as a marker for severity of MR.

Pu, M.; Griffin, B. P.; Vandervoort, P. M.; Stewart, W. J.; Fan, X.; Cosgrove, D. M.; Thomas, J. D.

1999-01-01

93

A water-filled body plethysmograph for the measurement of pulmonary capillary blood flow during changes of intrathoracic pressure  

PubMed Central

A water-filled body plethysmograph was constructed to measure gas exchange in man. As compared to an air-filled plethysmograph, its advantages were greater sensitivity, less thermal drift, and no change from adiabatic to isothermal conditions after a stepwise change of pressure. When five subjects were completely immersed within it and were breathing to the ambient atmosphere, they had a normal heart rate, oxygen consumption, CO2 output, and functional residual capacity. Pulmonary capillary blood flow ([unk]Qc) during and after Valsalva and Mueller maneuvers was calculated from measurements of N2O uptake. Control measurements of [unk]Qc were 2.58 liters/min per m2 at rest and 3.63 liters/min per m2 after moderate exercise. During the Valsalva maneuver at rest (intrapulmonary pressure: 24, SD 3.0, mm Hg), [unk]Qc decreased from a control of 2.58, SD 0.43, liters/min per m2 to 1.62, SD 0.26, liters/min per m2 with a decrease in pulmonary capillary stroke volume from a control of 42.4, SD 8.8, ml/stroke per m2 to 25.2, SD 5.5, ml/stroke per m2. After release of the Valsalva, there was an overshoot in [unk]Qc averaging +0.78, SD 0.41, liter/min per m2 accompanied by a significant increase in heart rate. Similar changes occurred during and after the Valsalva following moderate exercise. During the Mueller maneuver at rest and after exercise, [unk]Qc, heart rate, and central stroke volume did not change significantly. Images PMID:5422025

Kawakami, Yoshikazu; Menkes, Harold A.; DuBois, Arthur B.

1970-01-01

94

Sentinel Lymph Node Biopsy  

Cancer.gov

A fact sheet that describes the sentinel lymph node biopsy (SLNB) procedure, its use in determining the extent, or stage, of cancer in the body, and the results of research on the use of SLNB in breast cancer and melanoma.

95

Nasal high-flow oxygen therapy system for improving sleep-related hypoventilation in chronic obstructive pulmonary disease: a case report  

PubMed Central

Introduction Sleep-related hypoventilation should be considered in patients with chronic obstructive pulmonary disease, because appropriate respiratory management during sleep is important for preventing elevation of PaCO2 levels. A nasal high-flow oxygen therapy system using a special nasal cannula can deliver suitably heated and humidified oxygen at up to 60 L/min. Since the oxygen concentration remains a constant independent of minute ventilation, this system is particularly useful in patients with chronic obstructive pulmonary disease who have hypercapnia. This is the first report of sleep-related hypoventilation with chronic obstructive pulmonary disease improving using a nasal high-flow oxygen therapy system. Case presentation We report the case of a 73-year-old Japanese female who started noninvasive positive-pressure ventilation for acute exacerbation of chronic obstructive pulmonary disease and CO2 narcosis due to respiratory infection. Since she became agitated as her level of consciousness improved, she was switched to a nasal high-flow oxygen therapy system. When a repeat polysomnography was performed while using the nasal high-flow oxygen therapy system, the Apnea Hypopnea Index was 3.7 times/h, her mean SpO2 had increased from 89 to 93%, percentage time with SpO2 ? 90% had decreased dramatically from 30.8 to 2.5%, and sleep stage 4 was now detected for 38.5 minutes. As these findings indicated marked improvements in sleep-related hypoventilation, nasal high-flow oxygen therapy was continued at home. She has since experienced no recurrences of CO2 narcosis and has been able to continue home treatment. Conclusions Use of a nasal high-flow oxygen therapy system proved effective in delivering a prescribed concentration of oxygen from the time of acute exacerbation until returning home in a patient with chronic obstructive pulmonary disease, dementia and sleep-related hypoventilation. The nasal high-flow oxygen therapy system is currently used as a device to administer high concentrations of oxygen in many patients with type I respiratory failure, but may also be useful instead of a Venturi mask in patients like ours with type II respiratory failure, additionally providing some positive end-expiratory pressure. PMID:25312578

2014-01-01

96

Quantitative analysis of the central-chest lymph nodes based on 3D MDCT image data  

NASA Astrophysics Data System (ADS)

Lung cancer is the leading cause of cancer death in the United States. In lung-cancer staging, central-chest lymph nodes and associated nodal stations, as observed in three-dimensional (3D) multidetector CT (MDCT) scans, play a vital role. However, little work has been done in relation to lymph nodes, based on MDCT data, due to the complicated phenomena that give rise to them. Using our custom computer-based system for 3D MDCT-based pulmonary lymph-node analysis, we conduct a detailed study of lymph nodes as depicted in 3D MDCT scans. In this work, the Mountain lymph-node stations are automatically defined by the system. These defined stations, in conjunction with our system's image processing and visualization tools, facilitate lymph-node detection, classification, and segmentation. An expert pulmonologist, chest radiologist, and trained technician verified the accuracy of the automatically defined stations and indicated observable lymph nodes. Next, using semi-automatic tools in our system, we defined all indicated nodes. Finally, we performed a global quantitative analysis of the characteristics of the observed nodes and stations. This study drew upon a database of 32 human MDCT chest scans. 320 Mountain-based stations (10 per scan) and 852 pulmonary lymph nodes were defined overall from this database. Based on the numerical results, over 90% of the automatically defined stations were deemed accurate. This paper also presents a detailed summary of central-chest lymph-node characteristics for the first time.

Lu, Kongkuo; Bascom, Rebecca; Mahraj, Rickhesvar P. M.; Higgins, William E.

2009-02-01

97

The effect of supine exercise on the distribution of regional pulmonary blood flow measured using proton MRI.  

PubMed

The Zone model of pulmonary perfusion predicts that exercise reduces perfusion heterogeneity because increased vascular pressure redistributes flow to gravitationally nondependent lung, and causes dilation and recruitment of blood vessels. However, during exercise in animals, perfusion heterogeneity as measured by the relative dispersion (RD, SD/mean) is not significantly decreased. We evaluated the effect of exercise on pulmonary perfusion in six healthy supine humans using magnetic resonance imaging (MRI). Data were acquired at rest, while exercising (?27% of maximal oxygen consumption) using a MRI-compatible ergometer, and in recovery. Images were acquired in most of the right lung in the sagittal plane at functional residual capacity, using a 1.5-T MR scanner equipped with a torso coil. Perfusion was measured using arterial spin labeling (ASL-FAIRER) and regional proton density using a fast multiecho gradient-echo sequence. Perfusion images were corrected for coil-based signal heterogeneity, large conduit vessels removed and quantified (in ml·min(-1)·ml(-1)) (perfusion), and also normalized for density and quantified (in ml·min(-1)·g(-1)) (density-normalized perfusion, DNP) accounting for tissue redistribution. DNP increased during exercise (11.1 ± 3.5 rest, 18.8 ± 2.3 exercise, 13.2 ± 2.2 recovery, ml·min(-1)·g(-1), P < 0.0001), and the increase was largest in nondependent lung (110 ± 61% increase in nondependent, 63 ± 35% in mid, 70 ± 33% in dependent, P < 0.005). The RD of perfusion decreased with exercise (0.93 ± 0.21 rest, 0.73 ± 0.13 exercise, 0.94 ± 0.18 recovery, P < 0.005). The RD of DNP showed a similar trend (0.82 ± 0.14 rest, 0.75 ± 0.09 exercise, 0.81 ± 0.10 recovery, P = 0.13). In conclusion, in contrast to animal studies, in supine humans, mild exercise decreased perfusion heterogeneity, consistent with Zone model predictions. PMID:24356515

Hall, E T; Sá, R C; Holverda, S; Arai, T J; Dubowitz, D J; Theilmann, R J; Prisk, G K; Hopkins, S R

2014-02-15

98

Pulmonary and heart diseases with inhalation of atmospheric pressure plasma flow  

NASA Astrophysics Data System (ADS)

We examined blood pressure in the abdominal aorta of mini pig under plasma inhalation of atmospheric pressure plasma flow. The coaxial atmospheric pressure plasma source has a tungsten wire inside a glass capillary, that is surrounded by a grounded tubular electrode. Plasma was generated under the following conditions; applied voltage: 8 kVpp, frequency: 3 kHz, and helium (He) gas flow rate: 1 L/min. On the other hand, sphygmomanometry of a blood vessel proceeded using a device comprising a disposable force transducer, and a bedside monitor for simultaneous electrocardiography and signal pressure measurements. We directly measured Nitric oxide (NO) using a catheter-type NO sensor placed in the coronary sinus through an angiography catheter from the abdomen. Blood pressure decreased from 110/65 to 90/40 mm Hg in the animals in vivo under plasma inhalation. The NO concentration in the abdominal aorta like the blood pressure, reached a maximum value at about 40 s and then gradually decreased.

Hirata, Takamichi; Murata, Shigeru; Kishimoto, Takumi; Tsutsui, Chihiro; Kondo, Akane; Mori, Akira

2012-10-01

99

Lymphocytopoietic factor in lymph.  

PubMed

The evidences which suggest the presence of a lymphocytopietic factor in rat thoracic duct lymph are summarized briefly. The intravenous injections of the extracted materials from lymph plamsa into syngeneic recipient rats resulted in the massive proliferation of lymphoid cells predominantly in the thymus dependent areas and thymic cortex, suggesting that the target cells for the factor are not marrow-derived (B) cells, but thymus derived (T) cells. The existence of a thymus is not necessarily required for the production or secretion of the factor. The augmenting effect of the factor on T cell functions, eg. local graft-versus-host rection and helper activity of plaque forming response to sheep erythrocytes, is mentioned. The physicochemical characteristics of the factor are nondialysable and heat-stable glyco-protein molecules. The roles of lymph humoral factor in T cell-differentiation or proliferation are discussed. PMID:312981

Yamashita, A; Fukumoto, T; Miyamoto, M

1979-03-01

100

Tumor cell entry into the lymph node is controlled by CCL1 chemokine expressed by lymph node lymphatic sinuses  

PubMed Central

Lymphatic vessels are thought to contribute to metastasis primarily by serving as a transportation system. It is widely believed that tumor cells enter lymph nodes passively by the flow of lymph. We demonstrate that lymph node lymphatic sinuses control tumor cell entry into the lymph node, which requires active tumor cell migration. In human and mouse tissues, CCL1 protein is detected in lymph node lymphatic sinuses but not in the peripheral lymphatics. CCR8, the receptor for CCL1, is strongly expressed by human malignant melanoma. Tumor cell migration to lymphatic endothelial cells (LECs) in vitro is inhibited by blocking CCR8 or CCL1, and recombinant CCL1 promotes migration of CCR8+ tumor cells. The proinflammatory mediators TNF, IL-1?, and LPS increase CCL1 production by LECs and tumor cell migration to LECs. In a mouse model, blocking CCR8 with the soluble antagonist or knockdown with shRNA significantly decreased lymph node metastasis. Notably, inhibition of CCR8 led to the arrest of tumor cells in the collecting lymphatic vessels at the junction with the lymph node subcapsular sinus. These data identify a novel function for CCL1–CCR8 in metastasis and lymph node LECs as a critical checkpoint for the entry of metastases into the lymph nodes. PMID:23878309

Das, Suvendu; Sarrou, Eliana; Podgrabinska, Simona; Cassella, Melanie; Mungamuri, Sathish Kumar; Feirt, Nikki; Gordon, Ronald; Nagi, Chandandeep S.; Wang, Yarong; Entenberg, David; Condeelis, John

2013-01-01

101

Sentinel Lymph Node (SLN) Biopsy  

MedlinePLUS

... 1 BREAST CANCER LUMPECTOMY AND SENTINEL LYMPH NODE BIOPSY GENESIS MEDICAL CENTER DAVENPORT, IOWA October 10. 2007 ... breast cancer lumpectomy and subsequent sentinel lymph node biopsy. The procedure will be performed by Dr. David ...

102

Lymph Nodes Surgery Codes  

Cancer.gov

Lymph Nodes C770–C779 (Except for M9727, 9733, 9741-9742, 9764-9809, 9832, 9840-9931, 9945-9946, 9950-9967, 9975-9992) Codes 00 None; no surgery of primary site; autopsy ONLY 19 Local tumor destruction or excision, NOS Unknown whether a specimen

103

InterLymph Supplementals  

Cancer.gov

Morton LM, Turner JJ, Cerhan JR, Linet MS, Treseler PA, Clarke CA, Jack A, Cozen W, Maynadié M, Spinelli JJ, Seniori Costantini A, Rüdiger T, Scarpa A, Zheng T, Weisenburger DD. Proposed classification of lymphoid neoplasms for epidemiologic research from the International Lymphoma Epidemiology Consortium (InterLymph). Blood.

104

Optimal surface segmentation using flow lines to quantify airway abnormalities in chronic obstructive pulmonary disease.  

PubMed

This paper introduces a graph construction method for multi-dimensional and multi-surface segmentation problems. Such problems can be solved by searching for the optimal separating surfaces given the space of graph columns defined by an initial coarse surface. Conventional straight graph columns are not well suited for surfaces with high curvature, we therefore propose to derive columns from properly generated, non-intersecting flow lines. This guarantees solutions that do not self-intersect. The method is applied to segment human airway walls in computed tomography images in three-dimensions. Phantom measurements show that the inner and outer radii are estimated with sub-voxel accuracy. Two-dimensional manually annotated cross-sectional images were used to compare the results with those of another recently published graph based method. The proposed approach had an average overlap of 89.3±5.8%, and was on average within 0.096±0.097mm of the manually annotated surfaces, which is significantly better than what the previously published approach achieved. A medical expert visually evaluated 499 randomly extracted cross-sectional images from 499 scans and preferred the proposed approach in 68.5%, the alternative approach in 11.2%, and in 20.3% no method was favoured. Airway abnormality measurements obtained with the method on 490 scan pairs from a lung cancer screening trial correlate significantly with lung function and are reproducible; repeat scan R(2) of measures of the airway lumen diameter and wall area percentage in the airways from generation 0 (trachea) to 5 range from 0.96 to 0.73. PMID:24603047

Petersen, Jens; Nielsen, Mads; Lo, Pechin; Nordenmark, Lars Haug; Pedersen, Jesper Holst; Wille, Mathilde Marie Winkler; Dirksen, Asger; de Bruijne, Marleen

2014-04-01

105

Prenatal Diagnosis of Pulmonary Atresia With Intact Ventricular Septum  

Microsoft Academic Search

Pulmonary atresia with intact ventricular septum is a rare and complicated congenital cardiac anomaly. Pulmonary outflow is obstructed, which results in hypertrophy and hypoplasia of the right ventricle. The fetal echocardiographic findings include a small pulmonary artery with an atretic pulmonary valve, right ventricular hypertrophy, dilated right atrium, and absent flow in the pulmonary artery on Doppler interrogation. The left

Carolyn T. Coffin; Julia A. Drose; Elizabeth M. Shaffer

1998-01-01

106

Pulmonary valve stenosis  

MedlinePLUS

... valve pulmonary stenosis; Pulmonary stenosis; Stenosis - pulmonary valve; Balloon valvuloplasty - pulmonary ... water pills) Treat abnormal heartbeats and rhythms Percutaneous balloon pulmonary dilation (valvuloplasty) may be performed when no ...

107

Lymph node macrophages  

PubMed Central

Summary Lymph node (LN) macrophages have long been known for their efficient uptake of lymph-borne antigens. A convergence of studies on innate and adaptive immune responses has led to exciting recent advances in understanding their more specialized properties: presenting antigens to B cells, dendritic cells and T cells, producing trophic factors and cytokines, and, remarkably, being permissive for viral infection, a property critical for mounting anti-viral responses. LN macrophages have been traditionally divided into subsets based on their subcapsular sinus and medullary locations. Here we classify LN macrophages into three subsets: subcapsular sinus macrophages (SSMs), medullary sinus macrophages (MSMs) and medullary cord macrophages (MCMs). We review the literature regarding the roles of these cells in innate and adaptive immune responses and requirements for their development. We also discuss challenges associated with their purification as well as the existence of additional heterogeneity among LN macrophages. PMID:22488251

Gray, Elizabeth E.; Cyster, Jason G.

2013-01-01

108

Hilar lymph node metastasis of amelanotic malignant melanoma of unknown origin.  

PubMed

We report a case of hilar lymph node metastasis of amelanotic malignant melanoma of unknown origin. A left pulmonary nodule was detected during a check-up in a 58-year old woman. Chest computed tomography indicated a large left hilar mass located between the upper and lower lobes. She underwent left pneumonectomy with mediastinal lymph node dissection, and the tumour was diagnosed as hilar lymph node metastasis of an amelanotic malignant melanoma; however, the primary lesion could not be detected. Thus, the possibility of spontaneous regression of the primary lesion and the amelanotic subtype of malignant melanomas should be considered in clinical practice. PMID:24639453

Miura, Kentaro; Eguchi, Takashi; Saito, Gaku; Yoshida, Kazuo

2014-11-01

109

The prostaglandin challenge. Test to unmask obstructed total anomalous pulmonary venous connections in asplenia syndrome  

Microsoft Academic Search

The patient with complex congenital heart disease, severe pulmonary outflow obstruction, and visceral heterotaxia, may have 'silent' obstruction of the pulmonary venous return. Severe reduction of pulmonary blood flow secondary to pulmonary stenosis or atresia in such patients may prevent the usual radiographic appearance of pulmonary oedema. If such obstructed anomalous pulmonary venous connections are not diagnosed before operation, construction

R M Freedom; P M Olley; F Coceani; R D Rowe

1978-01-01

110

Pulmonary embolus  

MedlinePLUS

Venous thromboembolism; Lung blood clot; Blood clot - lung; Embolus; Tumor embolus; Embolism - pulmonary ... pulmonary embolus is most often caused by a blood clot in a vein. The most common blood ...

111

Pulmonary hypertension  

MedlinePLUS

... become larger. This condition is called right-sided heart failure, or cor pulmonale. Pulmonary hypertension may be caused ... heart Blood clots in the lung ( pulmonary embolism ) Heart failure Heart valve disease HIV infection Low oxygen levels ...

112

Pulmonary dirofilariasis  

Microsoft Academic Search

Background. Pulmonary dirofilariasis is a rare entity caused by Dirofilaria immitis, the dog heartworm that is transmitted to humans by mosquitos. This filarial nematode enters the subcutaneous tissue, travels to the right ventricle where it dies, and then embolizes the pulmonary vasculature, causing a small pulmonary infarction, which subsequently appears as a solitary nodule. Although these nodules are usually identified

Alberto Echeverri; Robert F Long; William Check; Clay M Burnett

1999-01-01

113

Label free in vivo laser speckle imaging of blood and lymph vessels  

NASA Astrophysics Data System (ADS)

The peripheral lymphatic vascular system is a part of the immune body system comprising a complex network of lymph vessels and nodes that are flowing lymph toward the heart. Traditionally the imaging of lymphatic vessels is based on the conventional imaging modalities utilizing contrast fluorescence materials. Given the important role of the lymphatic system there is a critical need for the development of noninvasive imaging technologies for functional quantitative diagnosis of the lymph vessels and lymph flow without using foreign chemicals. We report a label free methodology for noninvasive in vivo imaging of blood and lymph vessels, using long-exposure laser speckle imaging approach. This approach entails great promise in the noninvasive studies of tissues blood and lymph vessels distribution in vivo.

Kalchenko, Vyacheslav; Kuznetsov, Yuri; Meglinski, Igor; Harmelin, Alon

2012-05-01

114

Flow cytometric assessment of circulating platelet and erythrocytes microparticles in young thalassemia major patients: relation to pulmonary hypertension and aortic wall stiffness.  

PubMed

Heart disease is the leading cause of mortality and morbidity in ?-thalassemia major (?-TM). Aggregability of abnormal red cells and membrane-derived microparticles (MPs) stemming from activated platelets and erythrocytes are responsible for thrombotic risk. We measured platelet and erythrocyte MPs (PMPs and ErMPs) in 60 young ?-TM patients compared with 40 age- and sex-matched healthy controls and assessed their relation to clinicopathological characteristics and aortic elastic properties. Patients were studied stressing on transfusion history, splenectomy, thrombotic events, chelation therapy, hematological and coagulation profiles, flow cytometric measurement of PMPs (CD41b(+) ) and ErMPs (glycophorin A(+) ) as well as echocardiographic assessment of aortic elastic properties. Aortic stiffness index and pulmonary artery pressure were significantly higher, whereas aortic strain and distensibility were lower in TM patients than controls (P < 0.001). Both PMPs and ErMPs were significantly elevated in TM patients compared with controls, particularly patients with risk of pulmonary hypertension, history of thrombosis, splenectomy or serum ferritin >2500 ?g/L (P < 0.001). Compliant patients on chelation therapy had lower MPs levels than non-compliant patients (P < 0.001). PMPs and ErMPs were positively correlated to markers of hemolysis, serum ferritin, D-dimer, vWF Ag, and aortic stiffness, whereas negatively correlated to hemoglobin level and aortic distensibility (P < 0.05). We suggest that increased MPs may be implicated in vascular dysfunction, pulmonary hypertension risk, and aortic wall stiffness observed in thalassemia patients. Their quantification could provide utility for early detection of cardiovascular abnormalities and monitoring the biological efficacy of chelation therapy. PMID:23506251

Tantawy, Azza A G; Adly, Amira A M; Ismail, Eman A R; Habeeb, Nevin M

2013-06-01

115

Lymph Drainage in Pregnant Women  

PubMed Central

Aim. The aim of this study was to evaluate the efficacy of lymph drainage to reduce edema of pregnant women. Method. Pregnant women (30 limbs) from the Obstetrics Outpatient Clinic of the Medical School of Santa Casa in São Paulo in the period December 2009 to May 2010 were enrolled in this quantitative, prospective study. The patients, in the 5th to 8th months of gestation, were submitted to one hour of manual lymph drainage of the legs. The volume of the legs was measured by water displacement volumetry before and after one hour of drainage using the Godoy & Godoy manual lymph drainage technique. The paired t-test was used for statistical analysis with an alpha error of 5% being considered significant. Results. Manual lymph drainage significantly reduced swelling of the legs of pregnant women during the day (P = 0.04). Conclusion. Manual lymph drainage helps to reduce limb size during the day of pregnant women. PMID:24251034

Cataldo Oportus, Sylvia; de Paiva Rodrigues, Lilian; Pereira de Godoy, José Maria; Guerreiro Godoy, Maria de Fátima

2013-01-01

116

Enzyme activities in thoracic duct lymph and plasma of anaesthetized, conscious resting and exercising dogs  

Microsoft Academic Search

Summary  The significance of changes in lymph flow for the extracellular distribution and transport of cellular enzymes and for the level of enzyme activities in plasma was investigated. Specimens of thoracic duct lymph were obtained from an extracorporal lymph shunt in anaesthetized, conscious resting and treadmill exercising dogs (6 km×h–1 for 1 h) The activity of 10 enzymes and of protein

J. Lindena; W. Kiipper; I. Trautschold

1984-01-01

117

Contrast echocardiographic features of pulmonary hypertension and regurgitation.  

PubMed Central

Linear contrast echo configuration on the pulmonary valve M-mode echogram was assessed in 28 patients with pulmonary hypertension, in 10 with pulmonary regurgitation, and in 10 normal subjects. Contrast echo parallel lines filling the total systolic phase of the pulmonary valve were recorded in normal subjects. Contrast echo lines stopping in early systole around the pulmonary valve mid-systolic notch were seen in all the patients with pulmonary hypertension in relation to changes with the pulmonary flow. Contrast echo lines reversing the early diastole and crossing the pulmonary valve echogram during diastole were detected in all the patients with pulmonary regurgitation, consistent with the reversed flow across the valve. The use of contrast echocardiography to diagnose both pulmonary hypertension and regurgitation may provide further useful information, particularly when the orientation and time of appearance of the contrast echo lines are related to the systolic and/or diastolic phases of the pulmonary valve M-mode echogram. Images PMID:7295432

Gullace, G; Savoia, M T; Ravizza, P; Locatelli, V; Addamiano, P; Ranzi, C

1981-01-01

118

Fetal pulmonary hypertension prolongs the endothelin-1 induced increase in pulmonary artery smooth muscle cell cytosolic calcium concentration  

Microsoft Academic Search

Introduction: At birth, pulmonary artery (PA) blood flow increases 8–10 fold and PA pressure falls by 50% within 24 hours. The mechanisms responsible for postnatal adaptation of the pulmonary circulation remain incompletely understood. High serum endothelin-1 (ET-1) levels are found in infants with persistent pulmonary hypertension of the newborn. We hypothesized that chronic intrauterine pulmonary hypertension (PHT) potentiates agonist induced

B. C. Linden; F. O. Anderson; E. R. Resnik; J. M. Herron; D. N. Cornfield

2003-01-01

119

Prenatal prediction of lethal pulmonary hypoplasia: The hyperoxygenation test for pulmonary artery reactivity  

Microsoft Academic Search

Objective: The purpose of this study was to determine the predictive accuracy of a test for neonatal death from pulmonary hypoplasia by measuring changes in fetal pulmonary artery blood flow on room air and during maternal hyperoxygenation. Study Design: Women who were carrying fetuses with congenital anomalies that may cause pulmonary hypoplasia were offered participation in the study as part

Richard E. Broth; Dennis C. Wood; Juha Rasanen; Juan Carlos Sabogal; Ratana Komwilaisak; Stuart Weiner; Vincenzo Berghella

2002-01-01

120

Pulmonary hypertension in chronic obstructive pulmonary disease  

Microsoft Academic Search

Pulmonary hypertension in chronic obstructive pulmonary disease. J.A. Barbera `, V.I. Peinado, S. Santos. #ERS Journals Ltd 2003. ABSTRACT: Pulmonary hypertension is a common complication of chronic obstructive pulmonary disease (COPD). Its presence is associated with shorter survival and worse clinical evolution. In COPD, pulmonary hypertension tends to be of moderate severity and progresses slowly. However, transitory increases of pulmonary

J. A. Barbera; V. I. Peinado; S. Santos

2003-01-01

121

Lymph nodes in gastric cancer.  

PubMed

Surgery is the only curative therapy for gastric cancer and controversy still exist on the extend of surgery. As the lymphatic distribution of stomach is very complex, the determination of the actual lymph node involvement is important for making the decision in order to avoid complications. Sentinel node navigation surgery has recently been introduced in gastrointestinal tract cancer. Present article reviews the detection techniques of lymph nodes and significance of lymphadenectomies in gastric cancer. PMID:18720367

Ozmen, M Mahir; Ozmen, Fusun; Zulfikaroglu, Bari?

2008-11-01

122

Pulmonary dirofilariasis  

Microsoft Academic Search

Forty-one cases of pulmonary dirofilariasis in 39 patients are presented. The patients, all Americans, were between 8 and 80 years old (median, 58 years), including 23 men and 16 women. Twenty-two patients were asymptomatic (56%), and the pulmonary nodule was discovered on chest radiographs during a routine physical examination. Seventeen patients (44%) presented with respiratory symptoms or systemic complaints. Peripheral

Douglas B Flieder; César A Moran

1999-01-01

123

Pulmonary myelolipoma  

Microsoft Academic Search

Myelolipoma is an extremely rare, benign pulmonary lesion, usually presenting as an asymptomatic pulmonary nodule. We describe myelolipoma of the lung in a 54-year-old man, present on roentgenogram for 20 years, and we review the natural history, pathology, diagnosis, and management of such lesions.

Carlos J Sabate; David M Shahian

2002-01-01

124

PULMONARY CIRCULATION AT EXERCISE R NAEIJE, MD, PhD  

E-print Network

vascular disease. Table of contents #12;2 1. Introduction 2. Steady-flow pulmonary hemodynamics 21 PULMONARY CIRCULATION AT EXERCISE R NAEIJE, MD, PhD Department of Physiology Erasme Campus 265 9239 Email chesler@engr.wisc.edu Abstract The pulmonary circulation is a high flow and low

Chesler, Naomi C.

125

A novel bioreactor for mechanobiological studies of engineered heart valve tissue formation under pulmonary arterial physiological flow conditions.  

PubMed

The ability to replicate physiological hemodynamic conditions during in vitro tissue development has been recognized as an important aspect in the development and in vitro assessment of engineered heart valve tissues. Moreover, we have demonstrated that studies aiming to understand mechanical conditioning require separation of the major heart valve deformation loading modes: flow, stretch, and flexure (FSF) (Sacks et al., 2009, "Bioengineering Challenges for Heart Valve Tissue Engineering," Annu. Rev. Biomed. Eng., 11(1), pp. 289-313). To achieve these goals in a novel bioreactor design, we utilized a cylindrical conduit configuration for the conditioning chamber to allow for higher fluid velocities, translating to higher shear stresses on the in situ tissue specimens while retaining laminar flow conditions. Moving boundary computational fluid dynamic (CFD) simulations were performed to predict the flow field under combined cyclic flexure and steady flow (cyclic-flex-flow) states using various combinations of flow rate, and media viscosity. The device was successfully constructed and tested for incubator housing, gas exchange, and sterility. In addition, we performed a pilot experiment using biodegradable polymer scaffolds seeded with bone marrow derived stem cells (BMSCs) at a seeding density of 5?×?106 cells/cm2. The constructs were subjected to combined cyclic flexure (1?Hz frequency) and steady flow (Re?=?1376; flow rate of 1.06?l/min (LPM); shear stress in the range of 0-9 dynes/cm2) for 2 weeks to permit physiological shear stress conditions. Assays revealed significantly (P?Flow Synergistically Accelerate Mesenchymal Stem Cell-Mediated Engineered Tissue Formation: Implications for Engineered Heart Valve Tissues," Biomaterials, 27(36), pp. 6083-6095). The implications of this novel design are that fully coupled or decoupled physiological flow, flexure, and stretch modes of engineered tissue conditioning investigations can be readily accomplished with the inclusion of this device in experimental protocols on engineered heart valve tissue formation. PMID:25321615

Ramaswamy, Sharan; Boronyak, Steven M; Le, Trung; Holmes, Andrew; Sotiropoulos, Fotis; Sacks, Michael S

2014-12-01

126

Pulmonary lymphangiomyomatosis. A review.  

PubMed Central

Anatomic and clinical observations of 28 cases, including 23 previously unpublished, of pulmonary lymphangiomyomatosis are recorded and discussed. This brings the total reported to 57. All patients were women in the reproductive age group with the major complaint of breathlessness. This was usually progressive, and death from pulmonary insufficiency resulted within 10 years. Functional changes were obstructive or restrictive, or both. Pneumothorax, chylous effusions and hemoptysis were frequent complications. Radiographically the lesions initially appear as fine, linear and nodular, predominantly basal densities, and progress to a pattern of bullous change, or honeycombing, involving all portions of the lungs not sparing the region of the costophrenic sinuses as is typical of eosinophilic granuloma. There may be associated pleural effusions. A progressively increasing lung volume is characteristic. The lesions consist of an irregular, nodular or laminar "irrational" proliferation of smooth muscle within all portions of the lung, with loss of parenchyma leading to honeycombing. Proliferated muscle can obstruct bronchioles (with air trapping and formation of bullae often complicated by pneumothorax), venules (with pulmonary hemorrhage and hemosiderosis accompanied clinically by hemoptysis) and lymphatics (with chylothorax or chyloperitoneum). Both thoracic and abdominal lymph nodes and the thoracic duct can also be involved in the myoproliferative process with formation of subsidiary minute channels and obstruction. Renal or perirenal angiomyolipomas can also occur, as exemplified by 2 patients in the present series. Identical pulmonary lesions occasionally occur in tuberous sclerosis. Especially since these patients usually have no neurologic disturbances and are almost women, the possibility of a relationship between tuberous sclerosis and lymphangiomyomatosis must be considered. One feature of note in pulmonary lesions of tuberous sclerosis is the presence of adenomatoid proliferations of epithelium. Such changes were also observed in 2 patients of the present series, and it is remarkable that both of these women had "retarded"children. At present the question of whether by lymphangiomyomatosis is a forme fruste of tuberous sclerosis must be considered as unresolved. It may yield to further investigation, possibility including chromosomal studies. Images Fig 34 Fig 35 Fig 36 Fig 37 Fig 7 Fig 8 Fig 9 Figs 38-39 Fig 40 Fig 41 Fig 42 Figs 10-14 Fig 43 Fig 44 Fig 45 p[373]-a Fig 46 Fig 47 Fig 48 Fig 49 Fig 15 Fig 16 Fig 17 Fig 18 Fig 19 Fig 20 Fig 21 Fig 22 Fig 23 Fig 24 Fig 25 Fig 26 Fig 27 Fig 28 Fig 1 Fig 2 Figs 3-6 Fig 29 Fig 30 Figs 31-32 Fig 33 PMID:1146965

Corrin, B.; Liebow, A. A.; Friedman, P. J.

1975-01-01

127

Determinants of pulmonary blood volume  

PubMed Central

Pulmonary blood volume was determined by the radiocardiographic technique in 49 patients coming to cardiac catheterization. Since this method has not been directly compared with the more commonly used double injection of dye. 25 comparisons were carried out in 13 patients of the series. Agreement was good over a range of 4.5-21.1 heart cycles since there was no statistically significant difference between transit time values measured by the two methods. The relation of pulmonary blood volume to other hemodynamic factors in these 49 patients, with and without cardiac or pulmonary disease, was evaluated by means of multiple regression analysis. The analysis carried out for mean transit time indicates that this parameter varies predominately with flow. Pulmonary blood volume, in this series of resting recumbent individuals, varies to a significant degree only with total blood volume and with pulmonary venous pressure. No parameters of vascular distensibility, such as pulmonary vascular resistance, were found to affect the volume of blood in the lungs. The fact that variations in pulmonary blood volume among the subjects could be described by a multiple regression equation linear with respect to total blood volume and pulmonary venous pressure indicates that these variations are the result of passive distention of components of the vascular bed. PMID:4902826

Lewis, Milena L.; Gnoj, Julian; Fisher, Vincent J.; Christianson, Lynn C.

1970-01-01

128

Systemic to pulmonary fistulas in Hodgkin's disease.  

PubMed

Systemic to pulmonary fistula is an unusual entity and its association with hematological diseases like Hodgkin's is extremely rare. We present a case of a 26-year-old woman with a thoracic mass and large arteriovenous fistula. The diagnosis of Hodgkin's disease, nodular sclerosis, was obtained by a biopsy of the supraclavicular lymph node. We achieved an excellent response after combined treatment with chemotherapy, radiotherapy and arterial embolization with complete disappearance of the mass. PMID:10940804

Sabadell, C; Ruiz-Manzano, J; Muchart, J; Pereandreu, J; Batlle, M; Morera, J

2000-01-01

129

A Method For Estimating Pulmonary Blood Flow With Respiratory Inert Gas Analysis In An Open Gas Circuit  

Microsoft Academic Search

A model for non-invasively estimating pul- monary blood flow by applying respiratory inert gas analysis and a measuring system based on this model are described. This method allows the measurement to be performed in an open circuit gas system avoiding physiological disturbance inherent in rebreathing methods. As well, this method can be combined with a con- ventional breath-by-breath method to

K. Gan; I. Nishi; A. S. Slutsky

1990-01-01

130

Primary Pulmonary Hypertension  

MedlinePLUS

... ENews Home > Lung Disease > Primary Pulmonary Hypertension Primary Pulmonary Hypertension Primary pulmonary hypertension (PPH) is a rare lung ... Lung Association also provides patients with information about pulmonary arterial hypertension (PAH). In-Depth Resources Symptoms, Diagnosis and Treatment ...

131

[Dynamics of lung perfusion after pulmonary thromboendarterectomy in patients with chronic postembolic pulmonary hypertension].  

PubMed

Perfusion scintigraphy of the lungs is used as screening in order to confirm thrombormbolic genesis of pulmonary hypertension. Meanwhile, perfusion scintigraphy is a non-invasive and objective method of assessing haemocirculation in the pulmonary tissue. Using the quantitative method of calculation of the perfusion deficit, one may judge about efficiency of the treatment performed and to assess the dynamics of the state of the micro- circulatory bed of the lung. We examined a total of 53 patients presenting with chronic postembolic pulmonary hypertension, who underwent pulmonary thromboendarterectomy. Pulmonary tissue blood flow was assessed by means of perfusion scintigraphy prior to operation, and in the early postoperative (3 weeks after operation) and remote (6 months and more) periods. Analysing the values of perfusion deficit in patients depending on the pulmonary hypertension degree we revealed close correlation dependence between the perfusion deficit and pulmonary hypertension, i. e., increased pressure in the pulmonary artery was accompanied by a decreased defect of lung perfusion according to the findings of perfusion scintigraphy. Analyzing the findings of perfusion scintigraphy in patients presenting with chronic postembolic pulmonary hypertension prior to surgery, in the immediate and remote postoperative periods in all groups showed a statistically significant decrease in the perfusion deficit. It was demonstrated that the method of perfusion pulmonary scintigraphy reliably reflects the alterations in the pulmonary tissue perfusion after lung pulmonary thromboendarterectomy, thereby reflecting efficiency of surgical treatment. With the initially pronounces pulmonary hypertension, improvement of lung perfusion obtained at the hospital stage also continues in the remote period. PMID:23531670

Cherniavski?, A M; Aliapkina, E M; Terekhov, I N; Cherniavski?, M A; Edemski?, A G

2013-01-01

132

Mycobacterial Lineages Causing Pulmonary and Extrapulmonary Tuberculosis, Ethiopia  

PubMed Central

Molecular typing of 964 specimens from patients in Ethiopia with lymph node or pulmonary tuberculosis showed a similar distribution of Mycobacterium tuberculosis strains between the 2 disease manifestations and a minimal role for M. bovis. We report a novel phylogenetic lineage of M. tuberculosis strongly associated with the Horn of Africa. PMID:23622814

Firdessa, Rebuma; Berg, Stefan; Hailu, Elena; Schelling, Esther; Gumi, Balako; Erenso, Girume; Gadisa, Endalamaw; Kiros, Teklu; Habtamu, Meseret; Hussein, Jemal; Zinsstag, Jakob; Robertson, Brian D.; Ameni, Gobena; Lohan, Amanda J.; Loftus, Brendan; Comas, Inaki; Gagneux, Sebastien; Tschopp, Rea; Yamuah, Lawrence; Hewinson, Glyn; Gordon, Stephen V.; Young, Douglas B.

2013-01-01

133

Mycobacterial lineages causing pulmonary and extrapulmonary tuberculosis, Ethiopia.  

PubMed

Molecular typing of 964 specimens from patients in Ethiopia with lymph node or pulmonary tuberculosis showed a similar distribution of Mycobacterium tuberculosis strains between the 2 disease manifestations and a minimal role for M. bovis. We report a novel phylogenetic lineage of M. tuberculosis strongly associated with the Horn of Africa. PMID:23622814

Firdessa, Rebuma; Berg, Stefan; Hailu, Elena; Schelling, Esther; Gumi, Balako; Erenso, Girume; Gadisa, Endalamaw; Kiros, Teklu; Habtamu, Meseret; Hussein, Jemal; Zinsstag, Jakob; Robertson, Brian D; Ameni, Gobena; Lohan, Amanda J; Loftus, Brendan; Comas, Iñaki; Gagneux, Sebastien; Tschopp, Rea; Yamuah, Lawrence; Hewinson, Glyn; Gordon, Stephen V; Young, Douglas B; Aseffa, Abraham

2013-03-01

134

Lymph-node staining with activated carbon CH40: a new method for axillary lymph-node dissection in breast cancer  

PubMed Central

Objective To demonstrate the usefulness of activated carbon particles (CH40) as a vital staining dye for visualizing lymphatic vessels and lymph nodes in breast cancer. Design A retrospective evaluation. Setting Department of Surgery in Sendai National Hospital, Japan, a 716-bed teaching hospital. Methods To identify as many lymph nodes as possible in the axillary fat, by which we might decrease the possibility of the presence of undetected metastatic nodes, an emulsion of activated carbon particles (CH40) was injected into the centre of the mammary gland, close to the tumour site, 3 days before radical surgery. Main outcome measure The number of lymph nodes found by the traditional method and by the CH40-injection method were recorded. Results After injection, the CH40 was readily adsorbed into regional lymphatics and streamed along with the lymph flow to blacken regional lymph nodes. The CH40-guided method increased the mean number of nodes per case found in the axilla from 8.4, by the traditional method, to 14.0 nodes per case. Conclusions The use of the CH40 technique has two technical advantages; one is that it allows surgeons to locate the blackened lymph nodes at the time of surgery and the other is that it allows pathologists to look for the nodes in fatty tissue. Lymph-node dissection with the aid of activated carbon particles is inexpensive, easy to perform and enables the smallest lymph nodes to be easily recognized. CH40 is the technique of choice for the detection of axillary lymph nodes in cases where the number of lymph nodes detected by the traditional method is too small for accurate surgery. In conclusion, the present study demonstrates that CH40 could be an appropriate tool for more accurate staging of breast cancer axillary specimens. PMID:10851412

Yokota, Takashi; Saito, Toshihiro; Narushima, Yoichi; Iwamoto, Kazutsugu; Iizuka, Masashi; Hagiwara, Akeo; Sawai, Kiyoshi; Kikuchi, Shu; Kunii, Yasuo; Yamauchi, Hidemi

2000-01-01

135

Clinical significance of low forced expiratory flow between 25% and 75% of vital capacity following treated pulmonary tuberculosis: a cross-sectional study  

PubMed Central

Objectives The aim of this study was to assess the prevalence and determinants of post-tuberculosis chronic respiratory signs, as well as the clinical impact of a low forced expiratory flow between 25% and 75% (FEF25–75%) in a group of individuals previously treated successfully for pulmonary tuberculosis. Design This was a cross-sectional study involving individuals in their post-tuberculosis treatment period. They all underwent a spirometry following the 2005 criteria of the American Thoracic Society/European Respiratory Society. Distal airflow obstruction (DAO) was defined by an FEF25–75% <65% and a ratio forced expiratory volume during the first second (FEV1)/forced vital capacity (FVC) ? 0.70. Logistic regression models were used to investigate the determinants of persisting respiratory symptoms following antituberculous treatment. Setting This study was carried out in the tuberculosis diagnosis and treatment centre at Yaounde Jamot Hospital, which serves as a referral centre for tuberculosis and respiratory diseases for the capital city of Cameroon (Yaounde) and surrounding areas. Participants All consecutive patients in their post-tuberculosis treatment period were consecutively enrolled between November 2012 and April 2013. Results Of the 177 patients included, 101 (57.1%) were men, whose median age (25th-75th centiles) was 32 (24–45.5) years. At least one chronic respiratory sign was present in 110 (62.1%) participants and DAO was found in 67 (62.9%). Independent determinants of persisting respiratory signs were the duration of symptoms prior to tuberculosis diagnosis higher than 12?weeks (adjusted OR 2.91; 95% CI 1.12 to 7.60, p=0.029) and presence of DAO (2.22; 1.13 to 4.38, p=0.021). Conclusions FEF25–75%<65% is useful for the assessment and diagnosis of post-tuberculous DAO. Mass education targeting early diagnosis of pulmonary tuberculosis can potentially reduce the prevalence of post-tuberculosis respiratory signs and distal airflow obstruction. PMID:25056978

Pefura-Yone, Eric Walter; Kengne, Andre Pascal; Tagne-Kamdem, Pierre Eugene; Afane-Ze, Emmanuel

2014-01-01

136

Convective diffusion of nanoparticles from the epithelial barrier towards regional lymph nodes  

PubMed Central

Drug delivery using nanoparticles as drug carriers has recently attracted the attention of many investigators. Targeted delivery of nanoparticles to lymph nodes is especially important to prevent cancer metastasis or infection, and to diagnose disease stage. However, systemic injection of nanoparticles often results in organ toxicity because they reach and accumulate in all the lymph nodes in the body. An attractive strategy would be to deliver the drug-loaded nanoparticles to a subset of draining lymph nodes corresponding to a specific site or organ to minimize systemic toxicity. In this respect, mucosal delivery of nanoparticles to regional draining lymph nodes of a selected site creates a new opportunity to accomplish this task with minimal toxicity. One example is the delivery of nanoparticles from the vaginal lumen to draining lymph nodes to prevent the transmission of HIV in women. Other known examples include mucosal delivery of vaccines to induce immunity. In all cases, molecular and particle transport by means of diffusion and convective diffusion play a major role. The corresponding transport processes have common inherent regularities and are addressed in this review. Here we use nanoparticles delivery from the vaginal lumen to lymph nodes as an example to address the many aspects of associated transport processes. In this case, nanoparticles penetrate the epithelial barrier and move through the interstitium (tissue) to the initial lymphatics until they finally reach the lymph nodes. Since the movement of interstitial liquid near the epithelial barrier is retarded, nanoparticles transport was found to take place through special foci present in the epithelium. Immediately after nanoparticles emerge from the foci, they move through the interstitium due to diffusion affected by convection (convective diffusion). Specifically, the convective transport of nanoparticles occurs due to their convection together with interstitial fluid through the interstitium towards the initial lymph capillaries. Afterwards, nanoparticles move together with the lymph flow along the initial lymph capillaries and then enter the afferent lymphatics and ultimately reach the lymph node. As the liquid moves through the interstitium towards the initial lymph capillaries due to the axial movement of lymph along the lymphatics, the theory for coupling between lymph flow and concomitant flow through the interstitium is developed to describe this general case. The developed theory is applied to interpret the large uptake of Qdots by lymph nodes during inflammation, which is induced by pre-treating mouse vagina with the surfactant Nonoxynol-9 prior to instilling the Qdots. Inflammation is viewed here to cause broadening of the pores within the interstitium with the concomitant formation of transport channels which function as conduits to transport the nanoparticles to the initial lymph capillaries. We introduced the term “effective channels” to denote those channels which interconnect with foci present in the epithelial barrier and which function to transport nanoparticles to initial lymph capillaries. The time of transport towards the lymph node, predicated by the theory, increases rapidly with increasing the distance y0 between the epithelial barrier and the initial lymph capillaries. Transport time is only a few hours, when y0 is small, about some R (where R is the initial lymph capillary radius), due to the predomination of a rather rapid convection in this case. This transport time to lymph nodes may be tens of hours (or longer) when y0 is essentially larger and the slow diffusion controls the transport rate in a zone not far from the epithelial barrier, where convection is weak at large y0. Accounting for transport by diffusion only, which is mainly considered in many relevant publications, is not sufficient to explain our nanoparticles uptake kinetics because the possibility of fast transport due to convection is overlooked. Our systematic investigations have revealed that the information about the main transport conditions,

Dukhin, Stanislav S; Labib, Mohamed E.

2013-01-01

137

Convective diffusion of nanoparticles from the epithelial barrier toward regional lymph nodes.  

PubMed

Drug delivery using nanoparticles as drug carriers has recently attracted the attention of many investigators. Targeted delivery of nanoparticles to the lymph nodes is especially important to prevent cancer metastasis or infection, and to diagnose disease stage. However, systemic injection of nanoparticles often results in organ toxicity because they reach and accumulate in all the lymph nodes in the body. An attractive strategy would be to deliver the drug-loaded nanoparticles to a subset of draining lymph nodes corresponding to a specific site or organ to minimize systemic toxicity. In this respect, mucosal delivery of nanoparticles to regional draining lymph nodes of a selected site creates a new opportunity to accomplish this task with minimal toxicity. One example is the delivery of nanoparticles from the vaginal lumen to draining lymph nodes to prevent the transmission of HIV in women. Other known examples include mucosal delivery of vaccines to induce immunity. In all cases, molecular and particle transport by means of diffusion and convective diffusion play a major role. The corresponding transport processes have common inherent regularities and are addressed in this review. Here we use nanoparticle delivery from the vaginal lumen to the lymph nodes as an example to address the many aspects of associated transport processes. In this case, nanoparticles penetrate the epithelial barrier and move through the interstitium (tissue) to the initial lymphatics until they finally reach the lymph nodes. Since the movement of interstitial liquid near the epithelial barrier is retarded, nanoparticle transport was found to take place through special foci present in the epithelium. Immediately after nanoparticles emerge from the foci, they move through the interstitium due to diffusion affected by convection (convective diffusion). Specifically, the convective transport of nanoparticles occurs due to their convection together with interstitial fluid through the interstitium toward the initial lymph capillaries. Afterwards, nanoparticles move together with the lymph flow along the initial lymph capillaries and then enter the afferent lymphatics and ultimately reach the lymph node. As the liquid moves through the interstitium toward the initial lymph capillaries due to the axial movement of lymph along the lymphatics, the theory for coupling between lymph flow and concomitant flow through the interstitium is developed to describe this general case. The developed theory is applied to interpret the large uptake of Qdots by lymph nodes during inflammation, which is induced by pre-treating mouse vagina with the surfactant Nonoxynol-9 prior to instilling the Qdots. Inflammation is viewed here to cause broadening of the pores within the interstitium with the concomitant formation of transport channels which function as conduits to transport the nanoparticles to the initial lymph capillaries. We introduced the term "effective channels" to denote those channels which interconnect with foci present in the epithelial barrier and which function to transport nanoparticles to initial lymph capillaries. The time of transport toward the lymph node, predicated by the theory, increases rapidly with increasing the distance y0 between the epithelial barrier and the initial lymph capillaries. Transport time is only a few hours, when y0 is small, about some R (where R is the initial lymph capillary radius), due to the predomination of a rather rapid convection in this case. This transport time to the lymph nodes may be tens of hours (or longer) when y0 is essentially larger and the slow diffusion controls the transport rate in a zone not far from the epithelial barrier, where convection is weak at large y0. Accounting for transport by diffusion only, which is mainly considered in many relevant publications, is not sufficient to explain our nanoparticle uptake kinetics because the possibility of fast transport due to convection is overlooked. Our systematic investigations have revealed that the information about the main transport condition

Dukhin, Stanislav S; Labib, Mohamed E

2013-11-01

138

Visualization of Intrapulmonary Lymph Vessels in Healthy and Inflamed Murine Lung Using CD90/Thy-1 as a Marker  

PubMed Central

Background Lymphatic vessels play a pivotal role in fluid drainage and egress of immune cells from the lung. However, examining murine lung lymphatics is hampered by the expression of classical lymph endothelial markers on other cell types, which hinders the unambiguous identification of lymphatics. The expression of CD90/Thy-1 on lymph endothelium was recently described and we therefore examined its suitability to identify murine pulmonary lymph vessels under healthy and inflammatory conditions. Methodology/Principal Findings Immunohistochemistry with a monoclonal antibody against CD90.2/Thy-1.2 on 200 µm thick precision cut lung slices labeled a vascular network that was distinct from blood vessels. Preembedding immunostaining and electron microscopy verified that the anti-CD90.2/Thy-1.2 antibody labeled lymphatic endothelium. Absence of staining in CD90.1/Thy-1.1 expressing FVB mice indicated that CD90/Thy-1 was expressed on lymph endothelium and labeling was not due to antibody cross reactivity. Double-labeling immunohistochemistry for CD90/Thy-1 and ?-smooth muscle actin identified two routes for lymph vessel exit from the murine lung. One started in the parenchyma or around veins and left via venous blood vessels. The other began in the space around airways or in the space between airways and pulmonary arteries and left via the main bronchi. As expected from the pulmonary distribution of lymph vessels, intranasal application of house dust mite led to accumulation of T cells around veins and in the connective tissue between airways and pulmonary arteries. Surprisingly, increased numbers of T cells were also detected around intraacinar arteries that lack lymph vessels. This arterial T cell sheath extended to the pulmonary arteries where lymph vessels were located. Conclusions/Significance These results indicate that CD90/Thy-1 is expressed on lymphatic endothelial cells and represents a suitable marker for murine lung lymph vessels. Combining CD90/Thy-1 labeling with precision cut lung slices allows visualizing the anatomy of the lymphatic system in normal and inflamed conditions. PMID:23408960

Hagner-Benes, Stefanie; Marsh, Leigh M.; Garn, Holger; König, Peter

2013-01-01

139

Biomechanical and Molecular Aspects of Pulmonary Vascular Disease in Children with Congenital Heart Disease  

Microsoft Academic Search

Pulmonary hypertension and increased pulmonary blood flow both lead to functional\\u000aand structural changes in the pulmonary vasculature. Pulnlollary vascular disease\\u000aconstitutes an ongoing threat to children with congenital heart disease. Without .early\\u000asurgical repair, an estimated 30% of patients with congenital heart disease will develop\\u000asignitlcant pulmonary vascular disease. Pulmonary hypertension and pulmonary\\u000avascular disease arc important causes of

R. M. F. Berger

1998-01-01

140

Isolated left pulmonary artery stenosis due to extrinsic compression by intra thoracic tumor: recognition of unusual Doppler flow pattern and correlation with computed tomography.  

PubMed

Pulmonary artery compression in adults resulting from tumors is an uncommon condition often associated with poor prognosis. Among the imaging modalities used for diagnosis, the role of trans thoracic echocardiography in identifying secondary pulmonic stenosis due to extrinsic or intrinsic compression and more importantly the physiologic significance has been increasingly recognized. We describe here a case of isolated left pulmonary artery stenosis which was initially suspected based on classic echocardiographic features of obstruction of pulmonary artery and subsequently confirmed by CT imaging. This case illustrates the versatility of trans thoracic echocardiography in diagnosing incidental abnormalities with potential significant consequences. PMID:17086364

Jaffery, Zehra; Ananthasubramaniam, Karthik

2007-08-01

141

Visualising lymph movement in anuran amphibians with computed tomography.  

PubMed

Lymph flux rates in anuran amphibians are high relative to those of other vertebrates owing to 'leaky' capillaries and a high interstitial compliance. Lymph movement is accomplished primarily by specialised lymph muscles and lung ventilation that move lymph through highly compartmentalised lymph sacs to the dorsally located lymph hearts, which are responsible for pumping lymph into the circulatory system; however, it is unclear how lymph reaches the lymph hearts. We used computed tomography (CT) to visualise an iodinated contrast agent, injected into various lymph sacs, through the lymph system in cane toads (Rhinella marina). We observed vertical movement of contrast agent from lymph sacs as predicted, but the precise pathways were sometimes unexpected. These visual results confirm predictions regarding lymph movement, but also provide some novel findings regarding the pathways for lymph movement and establish CT as a useful technique for visualising lymph movement in amphibians. PMID:25165132

Hedrick, Michael S; Hansen, Kasper; Wang, Tobias; Lauridsen, Henrik; Thygesen, Jesper; Pedersen, Michael

2014-09-01

142

Pulmonary Vascular Response to Exercise in the Dog  

Microsoft Academic Search

The effects of exercise on the pulmonary circulation were studied in seven experiments on five dogs. Pulsatile pulmonary arterial flow and pressure and left atrial pressure were measured by chronically implanted transducers; pulmonary vascular input impedance, resistance, and hydraulic power were computed. The average effects of running on a treadmill at 6.5 mph, as compared with the resting state, were

VOL. XXIX; Ronald C. Elkins; William R. Milnor

143

Pulmonary function in space  

NASA Technical Reports Server (NTRS)

The lung is exquisitely sensitive to gravity, and so it is of interest to know how its function is altered in the weightlessness of space. Studies on National Aeronautics and Space Administration (NASA) Spacelabs during the last 4 years have provided the first comprehensive data on the extensive changes in pulmonary function that occur in sustained microgravity. Measurements of pulmonary function were made on astronauts during space shuttle flights lasting 9 and 14 days and were compared with extensive ground-based measurements before and after the flights. Compared with preflight measurements, cardiac output increased by 18% during space flight, and stroke volume increased by 46%. Paradoxically, the increase in stroke volume occurred in the face of reductions in central venous pressure and circulating blood volume. Diffusing capacity increased by 28%, and the increase in the diffusing capacity of the alveolar membrane was unexpectedly large based on findings in normal gravity. The change in the alveolar membrane may reflect the effects of uniform filling of the pulmonary capillary bed. Distributions of blood flow and ventilation throughout the lung were more uniform in space, but some unevenness remained, indicating the importance of nongravitational factors. A surprising finding was that airway closing volume was approximately the same in microgravity and in normal gravity, emphasizing the importance of mechanical properties of the airways in determining whether they close. Residual volume was unexpectedly reduced by 18% in microgravity, possibly because of uniform alveolar expansion. The findings indicate that pulmonary function is greatly altered in microgravity, but none of the changes observed so far will apparently limit long-term space flight. In addition, the data help to clarify how gravity affects pulmonary function in the normal gravity environment on Earth.

West, J. B.; Elliott, A. R.; Guy, H. J.; Prisk, G. K.

1997-01-01

144

Interlaboratory and Interstudy Reproducibility of a Novel Lateral-Flow Device and Influence of Antifungal Therapy on Detection of Invasive Pulmonary Aspergillosis  

PubMed Central

Interest in lateral-flow devices (LFDs) as potential point-of-care assays for the diagnosis of infectious diseases has increased. Our objective was to evaluate the interlaboratory and interstudy reproducibility and the effects of antifungal therapy on an LFD developed for invasive pulmonary aspergillosis (IPA) detection. An established neutropenic guinea pig model of IPA caused by Aspergillus fumigatus was used. At predetermined time points (1 h and 3, 5, and 7 days postinoculation), blood and bronchoalveolar lavage (BAL) fluid were collected from infected and uninfected animals. In a separate experiment, guinea pigs were treated with posaconazole (10 mg/kg of body weight orally [p.o.] twice a day [BID]), voriconazole (10 mg/kg p.o. BID), liposomal amphotericin B (10 mg/kg intraperitoneally [i.p.] once a day [QD]), or caspofungin (2 mg/kg i.p. QD), and samples were collected on days 7 and 11. Each laboratory independently evaluated the IgG monoclonal antibody-based LFD. Galactomannan and (1?3)-?-d-glucan were also measured using commercially available kits. Good interlaboratory agreement was observed with the LFD, as the results for 97% (32/33) of the serum and 78.8% (26/33) of the BAL fluid samples from infected animals were in agreement. Good interstudy agreement was also observed. The serum sensitivity of each surrogate-marker assay was reduced in animals treated with antifungals. In contrast, these markers remained elevated within the BAL fluids of treated animals, which was consistent with the fungal burden and histopathology results. These results demonstrate that the LFD assay is reproducible between different laboratories and studies. However, the sensitivity of this assay and other markers of IPA may be reduced with serum in the presence of antifungal therapy. PMID:23175252

Najvar, Laura K.; Bocanegra, Rosie; Kirkpatrick, William R.; Patterson, Thomas F.; Thornton, Christopher R.

2013-01-01

145

Lymph node involvement, recurrence, and prognosis in resected small, peripheral, non-small-cell lung carcinomas: Are these carcinomas candidates for video-assisted lobectomy?  

Microsoft Academic Search

To determine the clinicopathologic characteristics of peripheral non-small-cell carcinomas, the cases of 337 patients undergoing major pulmonary resection with complete lymphadenectomy were retrospectively reviewed with regard to lymph node involvement, recurrence, and prognosis. All of the tumors were 3.0 cm or less in diameter and were categorized as T1 (318 patients) or T2 (19). Eighty-eight patients (26.1%) had lymph node

Hisao Asamura; Haruhiko Nakayama; Haruhiko Kondo; Ryosuke Tsuchiya; Yukio Shimosato; Tsuguo Naruke

1996-01-01

146

Pulmonary hypertension and chronic mountain sickness.  

PubMed

Chronic mountain sickness is a syndrome of severe symptomatic polycythemia and hypoxemia occurring in natives or long-term high altitude sojourners. The condition may be complicated by pulmonary hypertension in proportion to decreased oxygenation, indicating hypoxic vasoconstriction and remodeling. Exercise in these patients is associated with a steep slope of pulmonary artery pressure-flow relationships and decreased vascular distensibility. Correction of pulmonary vascular resistance for increased hematocrit decreases the severity of pulmonary hypertension. Exercise-induced pulmonary hypertension in chronic mountain sickness does not affect exercise capacity, in relation to high oxygen content of the blood and increased lung diffusing capacity. Right ventricular failure seems to be an uncommon complication of chronic mountain sickness, but the exact prevalence of the condition is not known. Acetazolamide given for 6 months to patients with chronic mountain sickness improves oxygenation, polycythemia, and pulmonary artery pressure. PMID:23795731

Naeije, Robert; Vanderpool, Rebecca

2013-06-01

147

Proteomic Analysis of Human Mesenteric Lymph  

PubMed Central

Extensive animal work has established mesenteric lymph as the mechanistic link between gut ischemia/reperfusion (I/R) and distant organ injury. Our trauma and transplant services provide a unique opportunity to assess the relevance of our animal data to human mesenteric lymph under conditions that simulate those used in the laboratory. Mesenteric lymph was collected from eleven patients; with lymphatic injuries, during semi-elective spine reconstruction, or immediately before organ donation. The lymph was tested for its ability to activate human neutrophils in vitro, and was analyzed by label-free proteomic analysis. Human mesenteric lymph primed human PMNs in a pattern similar to that observed in previous rodent, swine, and primate studies. A total of 477 proteins were identified from the 11 subject’s lymph samples with greater than 99% confidence. In addition to classical serum proteins, markers of hemolysis, extracellular matrix components, and general tissue damage were identified. Both tissue injury and shock correlate strongly with production of bioactive lymph. Products of red blood cell hemolysis correlate strongly with human lymph bioactivity and immunoglobulins have a negative correlation with the pro-inflammatory lymph. These human data corroborate the current body of research implicating post shock mesenteric lymph in the development of systemic inflammation and multiple organ failure. Further studies will be required to determine if the proteins identified participate in the pathogenesis of multiple organ failure and if they can be used as diagnostic markers. PMID:21192285

Dzieciatkowska, Monika; Wohlauer, Max V.; Moore, Ernest E.; Damle, Sagar; Peltz, Erik; Campsen, Jeffrey; Kelher, Marguerite; Silliman, Christopher; Banerjee, Anirban; Hansen, Kirk C.

2011-01-01

148

A biomedical engineering approach to investigating flow and wall shear stress in contracting lymphatics  

E-print Network

Collecting microlymphatics play a vital role in promoting lymph flow from the initial lymphatics in the interstitial spaces to the large transport lymph ducts. In most tissues, the primary mechanism for producing this flow is the spontaneous...

Dixon, James Brandon

2006-08-16

149

Lung volumes, ventricular function and pulmonary arterial flow in children operated on for left-sided congenital diaphragmatic hernia: long-term results  

Microsoft Academic Search

Objectives  To compare MRI-based functional pulmonary and cardiac measurements in the long-term follow-up of children operated on for\\u000a left-sided congenital diaphragmatic hernia (CDH) with age- and body size-matched healthy controls.\\u000a \\u000a \\u000a \\u000a \\u000a Methods  Twelve children who received immediate postnatal surgery for closure of isolated left-sided CDH were included and received\\u000a basic medical examinations, pulmonary function testing and echocardiography. MRI included measurement of lung volume,

Nasreddin Abolmaali; Arne Koch; Knut Götzelt; Gabriele Hahn; Guido Fitze; Christian Vogelberg

2010-01-01

150

Infiltrating ductal carcinoma breast, metastatic to ipsilateral axillary lymph nodes harbouring primary tuberculous lymphadenitis: a case report  

PubMed Central

The coexistence of breast cancer and tuberculosis has been described in over 100 cases; however its coexistence in the axillary lymph node is rare with only a handful cases have been reported in the literature. We report a case of infiltrating ductal carcinoma of the left breast, metastatic to ipsilateral axillary lymph nodes harbouring tuberculous lymphadenitis without primary mammary or pulmonary tuberculosis. The case is presented for its rarity and illustrates that the simultaneous occurrence of tuberculosis and carcinoma can create a dilemma in the diagnosis and treatment, so surgeons and pathologists should keep such a combination on the back of their mind, especially in endemic areas.

Pandey, Pinki; Dixit, Alok; Tanwar, Aparna; Mahajan, NC

2014-01-01

151

[Pulmonary lymphangioleiomyomatosis].  

PubMed

A clinicomorphological analysis of 41 pulmonary lymphangioleiomyomatosis (PLAM) cases has been performed. Focal (7 cases) and diffuse (34 cases) forms were identified. Expression of NMB-45, desmin, actin, vimentin prove myogenic nature of the disease and confirm combination of two morphogenesis directions - proliferation of smooth muscle cells at the active phase of the growth and fibrosis at late stages. The presence of estrogen and progesteron receptors in smooth muscle cells shows hormonal dependance of cell proliferation. Thus, LAM is multisystem disease linked with abdominal tumors (angiomyolipomas, angioleiomyomas). Prognosis in the focal form is favourable, that in the diffuse form- unfavourable. PMID:16323477

Dvorakovskaia, I V; Baranova, O P

2005-01-01

152

Pulmonary artery segmentation and quantification in sickle cell associated pulmonary hypertension  

NASA Astrophysics Data System (ADS)

Pulmonary arterial hypertension is a known complication associated with sickle-cell disease; roughly 75% of sickle cell disease-afflicted patients have pulmonary arterial hypertension at the time of death. This prospective study investigates the potential of image analysis to act as a surrogate for presence and extent of disease, and whether the size change of the pulmonary arteries of sickle cell patients could be linked to sickle-cell associated pulmonary hypertension. Pulmonary CT-Angiography scans from sickle-cell patients were obtained and retrospectively analyzed. Randomly selected pulmonary CT-Angiography studies from patients without sickle-cell anemia were used as negative controls. First, images were smoothed using anisotropic diffusion. Then, a combination of fast marching and geodesic active contours level sets were employed to segment the pulmonary artery. An algorithm based on fast marching methods was used to compute the centerline of the segmented arteries. From the centerline, the diameters at the pulmonary trunk and first branch of the pulmonary arteries were measured automatically. Arterial diameters were normalized to the width of the thoracic cavity, patient weight and body surface. Results show that the pulmonary trunk and first right and left pulmonary arterial branches at the pulmonary trunk junction are significantly larger in diameter with increased blood flow in sickle-cell anemia patients as compared to controls (p values of 0.0278 for trunk and 0.0007 for branches). CT with image processing shows great potential as a surrogate indicator of pulmonary hemodynamics or response to therapy, which could be an important tool for drug discovery and noninvasive clinical surveillance.

Linguraru, Marius George; Mukherjee, Nisha; Van Uitert, Robert L.; Summers, Ronald M.; Gladwin, Mark T.; Machado, Roberto F.; Wood, Bradford J.

2008-03-01

153

Systemic to Pulmonary Fistulas in Hodgkin’s Disease  

Microsoft Academic Search

Systemic to pulmonary fistula is an unusual entity and its association with hematological diseases like Hodgkin’s is extremely rare. We present a case of a 26-year-old woman with a thoracic mass and large arteriovenous fistula. The diagnosis of Hodgkin’s disease, nodular sclerosis, was obtained by a biopsy of the supraclavicular lymph node. We achieved an excellent response after combined treatment

C. Sabadell; J. Ruiz-Manzano; J. Muchart; J. Pereandreu; M. Batlle; J. Morera

2000-01-01

154

[A case of pulmonary carcinomatous lymphangitis and multiple pulmonary infarctions from gastric cancer].  

PubMed

We report a case of pulmonary carcinomatous lymphangitis and multiple pulmonary infarctions from gastric cancer. A 58-year-old housewife presented with a complaint of a worsening cough over the previous 6 weeks. Chest radiography and CT scans revealed infiltration and diffuse ground-glass opacities in both lung fields, and she was hospitalized for further examination. No specific findings were found upon screening examination, including bronchoscopy with bronchoalveolar lavage (BAL). However, a CT scan showed mediastinal, hilar and paraaortic lymph node swelling, and therefore we suspected the presence of a malignant tumor. On the 11th hospital day, she suddenly developed severe hypoxia and went into cardiogenic shock. Although there was no sign of a filling defect in the vessels on CT with an intravenous contrast, we diagnosed pulmonary thromboembolism based on other examination findings and began thrombolysis and anticoagulant therapy. Treatment with heparin and urokinase did not improve her condition, and she died on the 14th hospital day. The autopsy findings revealed widespread gastric cancer with pulmonary lymphangitis carcinomatosa and thrombus formation in arterioles throughout the pulmonary lobes: 'Trousseau syndrome'. PMID:21894772

Koma, Yasuko; Matsuoka, Hirofumi; Ryoke, Towa; Koyama, Midori; Fukumitsu, Kensuke; Kasai, Yoshitaka; Masuya, Daiki; Yoshimatsu, Harukazu; Kitazawa, Sohei; Suzuki, Yujiro

2011-08-01

155

Pulmonary tumor thrombotic microangiopathy: the challenge of the antemortem diagnosis.  

PubMed

Pulmonary tumor thrombotic microangiopathy (PTTM) is known as a rare and severe cancer-related pulmonary complication. Nowadays, fewer than 80 cases have been reported in the literature and very few cases have been diagnosed antemortem. We describe an autopsy case of PTTM associated with cancer of unknown origin. A 56-year-old male patient came to our attention due to a 2-day history of dyspnea. Analysis of the clinical context in combination with laboratory and imaging tests led us to suspect acute pulmonary thromboembolism. However, the computed tomography pulmonary angiogram was negative for thromboembolism; on the contrary it revealed multiple lymphadenopathy. Microscopic pulmonary tumor embolism was suspected and a lymph node biopsy was planned. However, the patient's condition progressively worsened; death occurred 3 days after admission. After autopsy, histologically extensive neoplastic emboli involved the small pulmonary arteries and arterioles, often admixed with fibrin thrombi. The involved and noninvolved arteries also demonstrated fibrocellular intimal proliferation causing marked luminal stenosis and occlusion. These pathological features were characteristic of PTTM, which should be distinguished from microscopic tumor embolism and should be considered in the differential diagnosis of acute/subacute cor pulmonale and pulmonary hypertension in cancer as well as in noncancer patients. We propose a review of the literature and an algorithm to improve PTTM antemortem diagnosis. PMID:22710763

Patrignani, Anna; Purcaro, Augusto; Calcagnoli, Francesca; Mandolesi, Alessandra; Bearzi, Italo; Ciampani, Nino

2014-11-01

156

Mesenteric lymph node cavitation in coeliac disease.  

PubMed Central

A patient with coeliac disease and mesenteric lymph node cavitation is reported. This is a rare occurrence and has received very little attention in the English literature. Images Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 PMID:3721297

Holmes, G K

1986-01-01

157

Familial Blood and Lymph Node Cancers Study  

Cancer.gov

A study of a group of familial blood and lymph node cancers (also called "lymphoproliferative disorders"), including: chronic lymphocytic leukemia, Hodgkin lymphoma, non-Hodgkin lymphoma, Waldenström's macroglobulinemia, and multiple myeloma

158

Contraindications of sentinel lymph node biopsy: Áre there any really?  

Microsoft Academic Search

BACKGROUND: One of the most exciting and talked about new surgical techniques in breast cancer surgery is the sentinel lymph node biopsy. It is an alternative procedure to standard axillary lymph node dissection, which makes possible less invasive surgery and side effects for patients with early breast cancer that wouldn't benefit further from axillary lymph node clearance. Sentinel lymph node

George M Filippakis; George Zografos

2007-01-01

159

Elevated pulmonary artery pressure among Amhara highlanders in Ethiopia  

PubMed Central

OBJECTIVE Pulmonary arterioles respond to hypoxia with constriction that raises vascular resistance and pulmonary artery blood pressure. The response is sustained indefinitely by the chronic hypoxia of high-altitude residence among highlanders of European and Andean descent, but not Tibetans. The objective of this study was to identify the consequences of lifelong hypoxia exposure for the pulmonary vasculature among Amhara high-altitude natives from Ethiopia. METHODS A three-way static group comparison tested for the effect of Amhara ancestry and high residence altitude on pulmonary hemodynamics measured using echocardiography in samples of 76 healthy adult Amhara lifelong residents at 3700m, 54 Amhara lifelong residents at 1200m, and 46 U.S. low-altitude residents at 282m. RESULTS Amhara at 3700m had average Doppler-estimated pulmonary artery systolic pressure (tricuspid regurgitant gradient) of 27.9 ± 8.4 (SD) mmHg as compared with 21.9 ± 4.0 among Amhara at low altitude and 16.5 ± 3.6 in the U.S. low-altitude reference sample. However, there was no residence altitude effect on pulmonary blood flow or vascular resistance. Amhara ancestry was associated with greater pulmonary artery systolic pressure and pulmonary blood flow, yet lower pulmonary vascular resistance. CONCLUSIONS The Amhara at 3700m had elevated pulmonary artery pressure, but without the elevated pulmonary vascular resistance characteristic of the classic model of the response to long-term hypoxia by the pulmonary vasculature. The elevated pressure among Amhara may be a consequence of high pulmonary blood flow regardless of altitude and represent a newly identified pattern of response. PMID:21319245

Hoit, Brian D.; Dalton, Nancy D.; Gebremedhin, Amha; Janocha, Allison; Zimmerman, Peter A.; Zimmerman, Allison M.; Strohl, Kingman P.; Erzurum, Serpil C.; Beall, Cynthia M

2010-01-01

160

pulmonary trunk -> right pulmonary a., left pulmonary a. Branches of thoracic aorta  

E-print Network

Arteries Pulmonary pulmonary trunk -> right pulmonary a., left pulmonary a. Systemic Branches. -> middle cerebral aa. Circle of Willis - upon passing through foramen magnum, vertebral aa. -> basilar communicating a. vertebral a. -> basilar a. -> posterior cerebral aa. posterior communicating aa. join posterior

Houde, Peter

161

Interspecific comparisons of lymph volume and lymphatic fluxes: do lymph reserves and lymph mobilization capacities vary in anurans from different environments?  

PubMed

The femoral lymph sac volumes and lymph mobilization capacity were compared in three anuran species that span a range of environments, dehydration tolerance, ability to maintain blood volume with dehydration, and degrees of development of skeletal muscles putatively involved in moving lymph vertically to the posterior lymph hearts. The femoral lymph sac volume determined by Evans blue injection and dilution in the femoral lymph sac varied interspecifically. The semiaquatic species, Lithobates catesbeianus, had the greatest apparent lymph volume expressed either as 18.7 mL kg body mass?¹ or 94 mL kg thigh mass?¹, compared with both the terrestrial and aquatic species, Rhinella marina (7.3 mL kg body mass?¹ and 57 mL kg thigh mass?¹) and Xenopus laevis (6.5 mL kg body mass?¹ and 40 mL kg thigh mass?¹, respectively. Injections of Evans blue into the subvertebral lymph sac, which communicates with both pairs of lymph hearts, yielded the highest rates of lymph return to the circulation in all three species. The most terrestrial species had a greater rate of lymphatic return from the subvertebral lymph sac, compared with the other two species. The rate of lymph flux from the femoral sac varied interspecifically and was correlated with the number and development of skeletal muscles involved in lymph movement. The results indicated that the three species differ in both the volume of lymph present and the capacity to return lymph. Lymph flux was correlated with habitat and the ability to maintain blood volume when challenged by dehydration or hemorrhage, whereas femoral lymph volume was not correlated with these factors. PMID:21527817

Hillman, Stanley S; Drewes, Robert C; Hedrick, Michael S; Withers, Philip C

2011-01-01

162

Idiopathic Pulmonary Fibrosis  

MedlinePLUS

... causes of death include pulmonary hypertension (HI-per-TEN-shun), heart failure , pulmonary embolism (EM-bo-lizm), pneumonia (nu-MO-ne-ah), and lung cancer. Genetics may play a role in causing IPF. ...

163

Pulmonary hypertension - at home  

MedlinePLUS

Pulmonary hypertension (PAH) is abnormally high blood pressure in the arteries of the lungs. With PAH, the right ... al. ACCF/AHA 2009 expert consensus document on pulmonary hypertension: a report of the American College of Cardiology ...

164

Regulation of hypoxic pulmonary vasoconstriction: basic mechanisms.  

PubMed

Hypoxic pulmonary vasoconstriction (HPV), also known as the von Euler-Liljestrand mechanism, is a physiological response to alveolar hypoxia which distributes pulmonary capillary blood flow to alveolar areas of high oxygen partial pressure. Impairment of this mechanism may result in hypoxaemia. Under conditions of chronic hypoxia generalised vasoconstriction of the pulmonary vasculature in concert with hypoxia-induced vascular remodelling leads to pulmonary hypertension. Although the principle of HPV was recognised decades ago, its exact pathway still remains elusive. Neither the oxygen sensing process nor the exact pathway underlying HPV is fully deciphered yet. The effector pathway is suggested to include L-type calcium channels, nonspecific cation channels and voltage-dependent potassium channels, whereas mitochondria and nicotinamide adenine dinucleotide phosphate oxidases are discussed as oxygen sensors. Reactive oxygen species, redox couples and adenosine monophosphate-activated kinases are under investigation as mediators of hypoxic pulmonary vasoconstriction. Moreover, the role of calcium sensitisation, intracellular calcium stores and direction of change of reactive oxygen species is still under debate. In this context the present article focuses on the basic mechanisms of hypoxic pulmonary vasoconstriction and also outlines differences in current concepts that have been suggested for the regulation of hypoxic pulmonary vasoconstriction. PMID:19043010

Sommer, N; Dietrich, A; Schermuly, R T; Ghofrani, H A; Gudermann, T; Schulz, R; Seeger, W; Grimminger, F; Weissmann, N

2008-12-01

165

Pulmonary and thoracic macrophage subpopulations and clearance of particles from the lung  

SciTech Connect

Pulmonary macrophages consist of several subpopulations that can be defined by their anatomical locations as well as by other criteria. In addition to the well-known alveolar macrophages that reside on the alveolar surface, pulmonary macrophages also occur in the conducting airways, in various pulmonary interstitial regions, and, in some mammalian species, in the lung's intravascular compartment. Other thoracic macrophages of relevance to pulmonary defense and some lung disease processes are the pleural macrophages resident in the pleural space and macrophages present in regional lymph nodes that receive lymphatic drainage from the lung. Of the above subpopulations of pulmonary and thoracic macrophages, the alveolar macrophages have received the most experimental attention in the context of the pulmonary clearance and retention of deposited particles. Accordingly, less information is currently available regarding the roles other pulmonary and thoracic populations of macrophages may play in the removal of particles from the lower respiratory tract and associated tissue compartments. This report provides an overview of the various subpopulations of pulmonary and thoracic macrophages, as defined by their anatomical locations. The known and postulated roles of macrophages in the pulmonary clearance and retention of particles are reviewed, with particular emphasis on macrophage-associated processes involved in the pulmonary clearance of relatively insoluble particles. 270 refs., 22 figs., 1 tab.

Lehnert, B.E. (Los Alamos National Lab., NM (United States))

1992-07-01

166

Pulmonary Sarcoidosis in Childhood  

Microsoft Academic Search

Clinical and radlologic characteristics of pulmonary sarcoldosis in 26 children are presented. Initial nonspecific symptomatology and decreased pulmonary function are almost Invariably accompanied by radiologic evidence of pulmonary disease. BIlateral hilar lymphadenopathy frequently associated with bilateral paratracheal adenopathy is characteristic. Other mediastinal lymphadenopathy (subcarlnal, anterior, and posterior) is sporadically present, and Is invarIably associated with the more specific bilateral patterns

David F. Merten; Donald A. Kirks; Herman Grossman

1980-01-01

167

Pulmonary arterial remodeling in chronic obstructive pulmonary disease is lobe dependent  

PubMed Central

Abstract Pulmonary arterial remodeling has been demonstrated in patients with severe chronic obstructive pulmonary disease (COPD), but it is not known whether lobar heterogeneity of remodeling occurs. Furthermore, the relationship between pulmonary hypertension (PH) and pulmonary arterial remodeling in COPD has not been established. Muscular pulmonary arterial remodeling in arteries 0.10–0.25 mm in diameter was assessed in COPD-explanted lungs and autopsy controls. Remodeling was quantified as the percentage wall thickness to vessel diameter (%WT) using digital image analysis. Repeat measures mixed-effects remodeling for %WT was performed according to lobar origin (upper and lower), muscular pulmonary arterial size (small, medium, and large), and echocardiography-based pulmonary arterial pressure (no PH, mild PH, and moderate-to-severe PH). Lobar perfusion and emphysema indices were determined from ventilation-perfusion and computed tomography scans, respectively. Overall, %WT was greater in 42 subjects with COPD than in 5 control subjects (). Within the COPD group, %WT was greater in the upper lobes () and in the small muscular pulmonary arteries (). Lobar differences were most pronounced in medium and large arteries. Lobar emphysema index was not associated with arterial remodeling. However, there was a significant positive relationship between the lobar perfusion index and pulmonary arterial remodeling (). The presence of PH on echocardiography showed only a trend to a small effect on lower lobe remodeling. The pattern of pulmonary arterial remodeling in COPD is complicated and lobe dependent. Differences in regional blood flow partially account for the lobar heterogeneity of pulmonary arterial remodeling in COPD. PMID:24618551

Wrobel, Jeremy P.; McLean, Catriona A.; Thompson, Bruce R.; Snell, Gregory I.

2013-01-01

168

Pulmonary arterial Doppler velocimetry in fetuses with lung hypoplasia  

Microsoft Academic Search

Objective: The aim of the study was to examine Doppler flow velocity waveforms in the main stems of the pulmonary arteries in fetuses with autopsy-proven lung hypoplasia and to find out whether in these conditions typical patterns can be found. Study design: Doppler spectra were derived from the main stem of the right or left pulmonary artery in fetuses at

Rabih Chaoui; Karim Kalache; Cornelia Tennstedt; Franka Lenz; Martin Vogel

1999-01-01

169

Off-label use of an adjustable gastric banding system for pulmonary artery banding  

Microsoft Academic Search

Background: Pulmonary artery banding is proposed as a first palliation in infants with complex congenital heart disease and high pulmonary blood flow. In addition, it may be used to retrain the left ventricle. Optimal tightening may be difficult to obtain, leading to reoperation. An implantable device for pulmonary artery banding with telemetric control was recently developed allowing for repeated adjustments,

Younes Boudjemline; Emmanuelle Pineau; Caroline Bonnet; Alix Mollet; Sylvia Abadir; Damien Bonnet; Daniel Sidi; Gabriella Agnoletti

170

Draining lymph node cell activation in guinea pigs: comparisons with the murine local lymph node assay.  

PubMed

The local lymph node assay in the mouse is a novel predictive test for the identification of contact sensitizing chemicals. The purpose of the studies described was to determine whether a similar local lymph node assay could be performed successfully in guinea pigs; currently the species of choice for assessment of sensitizing potential for regulatory purposes. Ten sensitizing chemicals (oxazolone, picryl chloride, 2,4-dinitrofluorobenzene, benzocaine, cinnamic aldehyde, 2,4,-dinitrothiocyanobenzene, p-nitrosodimethylaniline, formaldehyde, p-phenylenediamine and cyanuric chloride) and equal concentrations of sodium lauryl sulphate were examined in a guinea pig local lymph node assay. Animals received three consecutive daily applications of various concentrations of the test chemical on the dorsum of both ears. Control animals were untreated. Five days following the initiation of exposure, draining auricular lymph nodes were excised and weighed. Suspensions of lymph node cells (LNC) were prepared and cultured for 24 or 48 h and proliferation measured by incorporation of [3H]thymidine. Exposure to at least one concentration of all sensitizing chemicals, other than benzocaine, induced proliferation by draining LNC. Responses were higher at 24 h rather than 48 h. Evidence is presented that guinea pig LNC proliferation may be enhanced or maintained by addition to culture of an exogenous source of the T cell growth factor interleukin 2 (IL-2). Draining lymph node weight was increased following exposure to some sensitizing chemicals but, compared with LNC proliferation, provided a less sensitive correlate of lymph node activation. Exposure to sodium lauryl sulphate failed to induce changes in either lymph node weight of LNC proliferation. Data are compared with three-day murine local lymph node assays performed concurrently. The available information indicates that the local lymph node assay may be performed in guinea pigs. PMID:1949049

Maurer, T; Kimber, I

1991-01-01

171

[Pulmonary manifestations of tuberculosis in children].  

PubMed

The occurrence of tuberculosis in children is dependent on a contagious bacillus carrying adult. Among 500 cases notified annually, perhaps 5 or 6% of the total infectious reservoir in France, 75% have parenchymal pulmonary disease and/or lymph nodes. These tuberculous diseases only represent 10% of the pulmonary disorders: 90% remain primary infections (PI active) or latent infections. These are most often asymptomatic (PI Latent) or of low grade activity (PI active). The CT scanner and fibreoptic bronchoscopy are indispensable complementary investigations in tuberculous disease. Whatever the clinical picture the diagnosis rests on bacteriological confirmation (but only 30% of cultures are positive) and most often rests on a body of evidence: for example a contagious adult living in proximity or a contagious family, or other risk factors are present. The evidence of a child with whatever form of pulmonary tuberculosis, even a latent primary infection, requires treatment which is adapted in such a way to enable a cure and to protect against subsequent endogenous re-activation. A coherent system of co-operation between the hospital and community service and between paediatricians and adult physicians is indispensable to find the index adult case to break the chain of contagion. There are two specific aspects in children, first congenital tuberculosis when a diagnosis is difficult and secondly tuberculosis in a child who is HIV positive when the management can be delicate. PMID:9496592

Olivier, C

1997-12-01

172

Chronic Pulmonary Embolism Mimicking Pulmonary Angiosarcoma  

E-print Network

We present the case of a 41-year-old woman who presented with chest pain. CT for possible pulmonary embolism showed a mass filling the left main pulmonary artery, with imaging features suggestive of pulmonary angiosarcoma. Open thoracotomy for excision of the mass revelaed no mass, only evidence of a chronic pulmonary thrombus of the left pulmonary artery. We conclude that the radiologic features of chronic pulmonary thrombus may mimick those of pulmonary angiosarcoma. Case Report A 41-year-old woman presented to the emergency department complaining of a three-day history of leftsided chest pain. The pain was described as pressurelike, pleuritic, made worse with ambulation and when supine. It was constant, increasing in intensity and not associated with any alleviating factors, hence her request for evaluation. She had denied any history of trauma, fevers, cough, night sweats nor hemoptisis. She denied any dyspepsia, and noted no relief of her symptoms with over-the-counter antacids. Six weeks prior to the onset of her chest pain she had complained of right hip pain, radiating down the leg. This was diagnosed as radicular pain secondary to sciatica for which she had been under bed rest and analgesics. This slowly improved, and she had reinitiated full ambulation about two weeks preceding her presentation. Her past medical history was remarkable for depres-Citation: Perez-Lozada JCL, Torstenson G. Chronic pulmonary embolism mimicking pulmonary angiosarcoma. Radiology Case Reports. [Online] 2008;3:148. Copyright: © 2008 The Authors. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 2.5 License, which permits reproduction and distribution, provided the original work is properly cited. Commercial use and derivative works are not permitted.

Juan Carlos Le; Ro Perez Lozada; Guy Torstenson

173

HEMOGLOBIN INFUSION DOES NOT ALTER MURINE PULMONARY VASCULAR TONE  

PubMed Central

Plasma hemoglobin (Hb) scavenges endothelium-derived nitric oxide (NO), producing systemic and pulmonary vasoconstriction in many species. We hypothesized that i.v. administration of murine cell-free Hb would produce pulmonary vasoconstriction and enhance hypoxic pulmonary vasoconstriction (HPV) in mice. To assess the impact of plasma Hb on basal pulmonary vascular tone in anesthetized mice we measured left lung pulmonary vascular resistance (LPVRI) before and after infusion of Hb at thoracotomy. To confirm the findings obtained at thoracotomy, measurements of right ventricular systolic pressure (RVSP) and systemic arterial pressure (SAP) were obtained in closed-chest wild-type mice. To elucidate whether pretreatment with Hb augments HPV we assessed the increase in LPVRI before and during regional lung hypoxia produced by left mainstem bronchial occlusion (LMBO) in wild-type mice pretreated with Hb. Infusion of Hb increased SAP but did not change pulmonary arterial pressure (PAP), left lung pulmonary arterial flow (QLPA) or LPVRI in either wild-type or diabetic mice with endothelial dysfunction. Scavenging of NO by plasma Hb did not alter HPV in wild-type mice. Inhibition of NO synthase with L-NAME did not change the basal LPVRI, but augmented HPV during LMBO. Our data suggest that scavenging of NO by plasma Hb does not alter pulmonary vascular tone in mice. Therefore, generation of NO in the pulmonary circulation is unlikely to be responsible for the low basal pulmonary vascular tone of mice. PMID:23313572

Beloiartsev, Arkadi; Baron, David M.; Yu, Binglan; Bloch, Kenneth D.; Zapol, Warren M.

2013-01-01

174

Anthracotic intrapulmonal lymph nodes mimicking lung metastases.  

PubMed

Intrapulmonal round lesions show characteristic radiologic features that distinguish them from other lung pathologies. Typically, they display a sharp margin with a homogenous inner pattern. Differential diagnosis includes metastases, particularly if the patient has a history of malignancy. However, benign lesions, although less common, should also be considered. We here present the case of a 58-year-old man with a history of bladder and prostate carcinoma, showing multiple typical round lesions on chest computed tomography, mimicking metastatic disease to the lung. Subsequently, wedge-resected specimens revealed anthracotic lymph nodes, so that intrapulmonal lymph nodes should be anticipated even in patients with preceding malignant disease. PMID:25087795

Jungraithmayr, Wolfgang; Delaloye-Frischknecht, Barbara; Weder, Walter

2014-08-01

175

[Mullerian "inclusions" within an intramammary lymph node].  

PubMed

We report a case of mullerian "inclusions" within an intra-mammary lymph node. Discovered on a routine mammography, the inclusions appeared in the right breast as a focus of microcalcifications. The 63-year-old patient was asymptomatic. Microcalcifications were associated with benign appearing epithelial formations which were positive for estrogen receptor antibodies and negative for thyroglobulin, calretinin and smooth muscle actin antibodies. Three years later, the patient developed a peritoneal low-grade serous carcinoma. Mullerian inclusions within lymph nodes are rather frequent below the diaphragm but exceptional above. Even in a supra-diaphragmatic localization, they can be associated with a pelvic serous tumor. PMID:17127851

Rousselot, Cécilia; Chapiron, Céline; Blechet, Claire; Arbion, Flavie; Fetissof, Franck

2006-06-01

176

Sentinel lymph node navigation surgery for early stage gastric cancer  

PubMed Central

We attempted to evaluate the history of sentinel node navigation surgery (SNNS), technical aspects, tracers, and clinical applications of SNNS using Infrared Ray Electronic Endoscopes (IREE) combined with Indocyanine Green (ICG). The sentinel lymph node (SLN) is defined as a first lymph node (LN) which receives cancer cells from a primary tumor. Reports on clinical application of SNNS for gastric cancers started to appear since early 2000s. Two prospective multicenter trials of SNNS for gastric cancer have also been accomplished in Japan. Kitagawa et al reported that the endoscopic dual (dye and radioisotope) tracer method for SN biopsy was confirmed acceptable and effective when applied to the early-stage gastric cancer (EGC). We have previously reported the usefulness of SNNS in gastrointestinal cancer using ICG as a tracer, combined with IREE (Olympus Optical, Tokyo, Japan) to detect SLN. LN metastasis rate of EGC is low. Hence, clinical application of SNNS for EGC might lead us to avoid unnecessary LN dissection, which could preserve the patient’s quality of life after operation. The most ideal method of SNNS should allow secure and accurate detection of SLN, and real time observation of lymphatic flow during operation. PMID:24914329

Mitsumori, Norio; Nimura, Hiroshi; Takahashi, Naoto; Kawamura, Masahiko; Aoki, Hiroaki; Shida, Atsuo; Omura, Nobuo; Yanaga, Katsuhiko

2014-01-01

177

Pulmonary Artery Sarcoma Mimicking Pulmonary Embolism  

PubMed Central

Primary sarcomas that arise from major blood vessels are exceedingly rare, and some of the published cases have been autopsy reports. Most patients are adults. We report a case of pulmonary artery sarcoma in a 77-year-old man who presented with acute onset of dyspnea. Magnetic resonance imaging of the chest revealed a large mass within the pulmonary trunk and its main branches. Because massive pulmonary embolism was suspected, both anticoagulant and thrombolytic therapies were initiated. The patient responded poorly to these therapies, which then necessitated resection of both the mass and the pulmonary valve. A bioprosthetic porcine valve replaced the native valve, and we reconstructed the right ventricular outflow tract with a Dacron patch. Histopathologic examination revealed a high-grade sarcoma with focal myogenic and chondrogenic differentiation. The patient tolerated the procedure well and was discharged from the hospital on postoperative day 7. He was subsequently treated with chemotherapy and radiation and continued to show no evidence of disease. The diagnosis of pulmonary artery sarcoma should be suspected in patients who present with manifestations of pulmonary embolism, especially when there is no evidence of deep venous thrombosis and poor response to anticoagulant therapy. Multimodal therapy can provide prolonged survival. PMID:25425986

Aftab, Muhammad; Al-Najjar, Raed M.; de la Cruz, Kim I.; Benjamin, Robert S.; Hallman, Charles H.

2014-01-01

178

Sentinel lymph node detection ex vivo using  

E-print Network

-vivo methylene-blue-dyed sen- tinel lymph nodes embedded in 3.2-cm-thick chicken breast tissues. The UOT system, as is photoacoustic imaging,6 nonionizing UOT has the potential to detect methylene-blue-dyed SLNs noninva- sively to our knowledge, we report the use of UOT to detect ex-vivo methylene-blue-dyed SLNs buried in chicken

Wang, Lihong

179

Lymph node metastases arising from uveal melanoma  

Microsoft Academic Search

Summary Since the eye lacks lymphatic vessels, uveal melanomas primarily metastasize hematogenously. Here we report the case of a patient with ciliary body ring melanoma who developed lymph node metastases after a fistulating glaucoma operation. A 40-year-old female Caucasian patient presented with unilateral pigment dispersion. Pigment dispersion glaucoma was diagnosed and since the intraocular pressure could not be managed with

Navid Ardjomand; Peter Komericki; Gerald Langmann; Dietmar Mattes; Murat Moray; Michael Scarpatetti; Yosuf El-Shabrawi

2005-01-01

180

Lymph node findings in generalized mastocytosis.  

PubMed

Lymph nodes from 21 cases of generalized mastocytosis were studied histologically to confirm or exclude mast cell infiltration, and to investigate their micro-architecture. Mast cell infiltrates were detected in 17 (80%) of the lymph nodes and were found mainly in the medullary cords and sinuses. Diffuse infiltration was seen in 14 cases and focal infiltration in three cases. The following pathological findings were frequently observed: germinal centre hyperplasia (n = 14), which is probably a nonspecific finding; and hyperplasia of small blood vessels, which sometimes resembled high endothelial venules (14), eosinophilia (8), plasmacytosis (7) and collagen fibrosis (6), all of which may well be related to the effects of mediators released by mast cells. Infiltrates of acute or chronic myeloid leukaemia were seen in six lymph nodes. Division of the cases into two prognostically different groups, i.e. systemic mastocytosis, in which the skin lesions of urticaria pigmentosa are present and the prognosis is favourable, and malignant mastocytosis, in which there is no cutaneous involvement and the prognosis is poor, revealed that all six lymph nodes exhibiting leukaemic infiltrates came from the malignant mastocytosis group; eosinophilia, plasmacytosis and fibrosis were seen significantly more often in malignant than in systemic mastocytosis, but blood vessel hyperplasia and germinal centre hyperplasia were encountered with the same high frequency in both groups; and mast cell atypia tended to be more pronounced in malignant mastocytosis; this diagnosis could therefore easily be missed without naphthol AS-D chloroacetate esterase staining.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:1452127

Horny, H P; Kaiserling, E; Parwaresch, M R; Lennert, K

1992-11-01

181

Quantitation of fat and cholesterol transport in the mesenteric lymph and bile of the preruminant calf.  

PubMed

Nine preruminant male calves were prepared surgically with lymphatico-venous shunts and/or re-entrant gallbladder to proximal duodenum shunts to evaluate the effects of degree of saturation of dietary fat on cholesterol transport in intestinal lymph and bile. Liquid diets were formulated to contain 12.5% dried skim milk (SM) or 10.5% SM to which 2% soybean oil (SBO), milk fat (MF), beef tallow (T) or one of these fats plus supplemental cholesterol was added. After 3-d dietary treatments, total lymph collections were made to determine flow rate, total lipid and cholesterol transport. Total bile collections were made to determine flow rate and cholesterol and bile acid transport. For SM, SBO, MF and T diets, respectively, average lipid transport in mesenteric lymph was 8.94, 32.58, 64.86 and 38.12 mg/(h X kg body weight), and cholesterol transport averaged 1.09, 1.92, 2.41 and 2.70 mg/(h X kg body weight). Lipid and cholesterol transport in lymph was less (P less than 0.05) in SM-fed calves than in fat-fed calves. Source of fat or supplemental cholesterol had no statistically significant effect on amount of cholesterol or bile acid transported in bile; however, calves fed SM transported greater quantities of cholesterol in bile than did calves fed fat or fat plus cholesterol. PMID:3981261

Davis, L D; McGilliard, A D; Richard, M J; Theobald, J L; Jacobson, N L

1985-04-01

182

Sentinel Lymph Node Biopsy for Breast Cancer: Our Technique and Future Directions in Lymph Node Staging  

PubMed Central

Breast cancer remains a major cause of cancer death for women in the United States. Accurate cancer staging, especially of the axillary lymph nodes, is essential for predicting the prognosis of patients and for determining the appropriate multimodality treatment strategy. Historically, the traditional approach for staging the lymphatic metastasis in breast cancer has been Axillary lymph node dissection (ALND). However, as the understanding of the lymphatic drainage of the breast has improved, the Sentinel lymph node (SLN) biopsy has replaced ALND as the gold standard for lymph node staging in breast cancer. Multiple studies have demonstrated the benefits of SLN biopsy compared to ALND in terms of morbidity, while maintaining the clinical ability to appropriately stage patients, but without any loss in therapeutic impact. In this review, we discuss the historical development of SLN biopsy, describe our technique in detail, and discuss the possible future directions of the lymphatic staging of breast cancer. PMID:23513181

Rashid, Omar M.; Takabe, Kazuaki

2012-01-01

183

Bilateral pulmonary artery aneurysms  

Microsoft Academic Search

Pulmonary artery aneurysms are rare. The estimated incidence is 1 in 14,000 in autopsies. Bilateral main pulmonary artery aneurysms have not been previously reported in the literature.A 36-year-old woman who has been diagnosed as having an ostium secundum defect with severe pulmonary hypertension was found dead. Autopsy revealed an emaciated body. The heart was enlarged. Right atrium and ventricle were

Sarathchandra Kodikara; Murugapillei Sivasubramanium

2009-01-01

184

Handbook of pulmonary emergencies  

SciTech Connect

This book presents information on the following topics: clinical assessment of the patient with pulmonary disease; interpretation of arterial blood gases in the emergency patient; life-threatening pneumonia; extrapulmonic ventilatory failure; acute inhalation lung disease; pulmonary edema; near drowning; chest trauma; upper airway emergencies; chronic lung disease with acute respiratory decompensation; acute respiratory failure in the patient with chronic airflow obstruction; asthma; hemoptysis; embolic pulmonary disease; superior vena cava syndrome; catastrophic pleural disease; ventilatory assistance and its complications; and ventilator emergencies.

Spaquolo, S.V.; Medinger, A

1986-01-01

185

Introduction About 6070% of patients with lymph-node-negative  

E-print Network

Articles Introduction About 60­70% of patients with lymph-node-negative breast cancer are cured predictions on disease outcome for patients with lymph-node-negative breast cancer. Methods Patients' samples samples from patients with lymph-node- negative breast cancer who were treated during 1980­95, but who did

Tian, Qi

186

Protein predictive signatures for lymph node metastasis of gastric cancer.  

PubMed

Lymph node status remains one of most crucial indicators of gastric cancer prognosis and treatment planning. Current imaging methods have limited accuracy in predicting lymph node metastasis. We sought to identify protein markers in primary gastric cancer and to define a risk model to predict lymph node metastasis. The Protein Pathway Array (PPA) (initial selection) and Western blot (confirmation) were used to assess the protein expression in a total of 190 freshly frozen gastric cancer samples. The protein expression levels were compared between samples with lymph node metastasis (n = 73) and those without lymph node metastasis (n = 57) using PPA. There were 27 proteins differentially expressed between lymph node positive samples and lymph node negative samples. Five proteins (Factor XIII B, TFIIH p89, ADAM8, COX-2 and CUL-1) were identified as independent predictors of lymph node metastasis. Together with vascular/lymphatic invasion status, a risk score model was established to determine the risk of lymph node metastasis for each individual gastric cancer patient. The ability of this model to predict lymph node metastasis was further confirmed in a second cohort of gastric cancer patients (33 with and 27 without lymph node metastasis) using Western blot. This study indicated that some proteins differentially expressed in gastric cancer can be selected as clinically useful biomarkers. The risk score model is useful for determining patients' risk of lymph node metastasis and prognosis. PMID:23011604

Li, Wei; Ye, Fei; Wang, Daguang; Sun, Xuan; Tong, Weihua; Lian, Guodong; Jiang, Jing; Suo, Jian; Zhang, David Y

2013-04-15

187

PRECLINICAL STUDY Prediction of lymph node involvement in breast cancer  

E-print Network

PRECLINICAL STUDY Prediction of lymph node involvement in breast cancer from primary tumor tissue- ther lymph node involvement in breast cancer is influenced by gene or miRNA expression of the primary tissue from a group of 96 breast cancer patients balanced for lymph node involvement using Affymetrix

188

Extraction and Analysis of Carcinoembryonic Antigen in Lymph Nodes  

Microsoft Academic Search

PURPOSE: To detect lymph node metastasis of colorectal cancer, we extracted protein from lymph nodes and determined the concentration of carcinoembryonic antigen. METHODS: In Experiment 1, a total of 237 lymph nodes from 23 colorectal cancer patients were examined histologically after immersion in 200 µl of saline for 2 hours. Concentrations of protein and carcinoembryonic antigen in each saline sample

Toshiyuki Kanoh; Takushi Monden; Yasuhiro Tamaki; Tadashi Ohnishi; Kimimasa Ikeda; Hikaru Izawa; Mitsugu Sekimoto; Naohiro Tomita; Morito Monden

2002-01-01

189

Pulmonary Artery Sarcoma Masquerading as Chronic Pulmonary Thromboembolism  

PubMed Central

We describe the case of a 60-year-old woman who presented with pulmonary artery sarcoma, a very rare tumor of the cardiovascular system. Her tumor was initially misdiagnosed as chronic pulmonary thromboembolism, and she underwent pulmonary endarterectomy. Early diagnosis of primary pulmonary artery sarcoma is crucial. That alternative should always be considered before settling on a diagnosis of pulmonary embolism. Suspicion should be aroused by the failure of anticoagulant treatment to alleviate pulmonary perfusion abnormalities and systemic symptoms. Surgical resection of the tumor—preferably by pulmonary endarterectomy, followed by reconstruction as needed—is currently the most promising treatment for pulmonary artery sarcoma. PMID:25425987

Coskun, Ugur; Calpar, Ilknur; Yildizeli, Bedrettin; Yanartas, Mehmet; Filinte, Deniz; Kucukoglu, Mehmet Serdar

2014-01-01

190

Pulmonary veno-occlusive disease  

MedlinePLUS

Pulmonary vaso-occlusive disease ... In most cases, the cause of pulmonary veno-occlusive disease is unknown. The high blood pressure occurs in the pulmonary arteries, which are the lung arteries directly connected to the right side ...

191

Chronic Obstructive Pulmonary Disease (COPD)  

MedlinePLUS

MENU Return to Web version Chronic Obstructive Pulmonary Disease (COPD) Overview What is chronic obstructive pulmonary disease (COPD)? Chronic obstructive pulmonary disease (also called COPD) is a lung disease that makes it ...

192

Pulmonary rehabilitation: future directions.  

PubMed

Pulmonary rehabilitation is now an established standard of care for patients with chronic obstructive pulmonary disease (COPD). Although pulmonary rehabilitation has no appreciable direct effect on static measurements of lung function, it arguably provides the greatest benefit of any available therapy across multiple outcome areas important to the patient with respiratory disease, including dyspnea, exercise performance, and health-related quality of life. It also appears to be a potent intervention that reduces COPD hospitalizations, especially when given in the periexacerbation period. The role of pulmonary rehabilitation within the larger schema of integrated care represents a fruitful area for further research. PMID:24874138

Nici, Linda; ZuWallack, Richard L

2014-06-01

193

Influenza vaccine with Surfacten, a modified pulmonary surfactant, induces systemic and mucosal immune responses without side effects in minipigs  

Microsoft Academic Search

Immune responses and side effects of intranasally administered flu vaccine with the commercial product Surfacten, a modified bovine pulmonary surfactant, were investigated in minipigs. The use of minipigs was based on the anatomical resemblance of nasal lymph nodes, the principal antigen uptake site of respiratory mucosal immunity, between pig and human. Intranasal instillation of HA vaccine adjuvanted with Surfacten elicited

Maki Nishino; Dai Mizuno; Takashi Kimoto; Wakako Shinahara; Akiho Fukuta; Tsunetomo Takei; Kaori Sumida; Seiichiro Kitamura; Hiroshi Shiota; Hiroshi Kido

2009-01-01

194

Pulmonary toxicity of Mount St. Helens volcanic ash  

SciTech Connect

The effects of Mount St. Helens volcanic ash, a sandy loam soil, and quartz particles on the lung and mediastinal lymph nodes of Fischer rats were studied at time intervals of up to 109 days after in tratracheal instillation of 40 mg ash, soil, or quartz in a single dose or after multiple doses of ash instilled in seven consecutive weekly doses for a total deposition of 77 mg. Quartz caused early granuloma formation, later fibrosis was also seen in lymph nodes. Volcanic ash caused an ill-defined inflammatory reaction with a few rats showing granuloma formulation, a very limited linear fibrosis, and a moderate lipoproteinosis, and lymph nodes were enlarged with numerous microgranulomas but without reticulin and collagen formation. Pulmonary reactions to soil particles were less intense but similar to those in ash- exposed animals; lymph nodes were not enlarged. No significant clearance of ash was found at 3 months after instillation. Volcanic ash produced a simple pneumoconiosis similar to what has been described for animals and humans living for prolonged periods of time in dusty desert areas of the United States.

Sanders, C.L.; Conklin, A.W.; Gelman, R.A.; Adee, R.R.; Rhoads, K.

1982-02-01

195

Lymph node fine needle Cytology in the staging and follow-up of Cutaneous Lymphomas  

PubMed Central

Background Lymph nodal involvement is an important clinical-pathological sign in primary cutaneous lymphoma (PCL), as it marks the transformation/evolution of the disease from localized to systemic; therefore the surveillance of lymph nodes is important in the staging and follow up of PCL. Fine needle cytology (FNC) is widely used in the diagnosis of lymphadenopathies but has rarely been reported in PCL staging and follow-up. In this study an experience on reactive and neoplastic lymphadenopathies arisen in PCL and investigated by FNC, combined to ancillary techniques, is reported. Methods Twenty-one lymph node FNC from as many PCL patients were retrieved; 17 patients had mycosis fungoides (MF) and 4 a primary cutaneous B-cell lymphoma (PBL). In all cases, rapid on site evaluation (ROSE) was performed and additional passes were used to perform flow cytometry (FC), immunocytochemistry (ICC) and/or polymerase chain reaction (PCR) to assess or rule out a possible clonality of the corresponding cell populations. Results FNC combined with FC, ICC, and PCR identified 12 cases of reactive, non specific, hyperplasia (BRH), 4 dermatopathic lymphadenopathy (DL), 4 lymph nodal involvement by MF and 1 lymph nodal involvement by cutaneous B-cell lymphoma. Conclusions FNC coupled with ancillary techniques is an effective tool to evaluate lymph node status in PCL patients, provided that ROSE and a rational usage of ancillary techniques is performed according to the clinical context and the available material. The method can be reasonably used as first line procedure in PCL staging and follow up, avoiding expensive and often ill tolerated biopsies when not strictly needed. PMID:24393425

2014-01-01

196

Sentinel lymph node biopsy in breast cancer patients with previous breast augmentation surgery.  

PubMed

The number of breast augmentation surgeries (BAS) has increased. Therefore, the number of breast cancer patients with history of BAS has also increased. In this paper, we present two cases of sentinel lymph node biopsy (SLNB) in patients with previous BAS who were diagnosed with breast cancer. The patients were augmented using different approach; the first case was augmented through transaxillary incision, whereas the second case was augmented through periareolar incision. Lymphoscintigraphy (LPG) was performed on the patients 1 day prior to operation, enabling confirmation of lymphatic flow and SLN in both patients. SLNB was successfully performed in both cases. In one patient, SLNB was performed using indocyanine green (ICG) fluorescence and the Photodynamic Eye (PDE) system. Regardless of history of BAS, ICG and PDE system showed lymphatic flow and SLN in real time. LPG and ICG fluorescence were useful methods for SLN detection in patients with previous BAS, being able to confirm lymph flow before operation. Biopsy methods using LPG and PDE system were considered useful for difficult confirmation of lymph flow after breast augmentation. This is the first report of SLNB using ICG and PDE system for patients with previous BAS. PMID:21671037

Nagao, Tomoya; Hojo, Takashi; Kurihara, Hiroaki; Tsuda, Hitoshi; Tanaka-Akashi, Sadako; Kinoshita, Takayuki

2014-09-01

197

Prediction of therapeutic response in steroid-treated pulmonary sarcoidosis. Evaluation of clinical parameters, bronchoalveolar lavage, gallium-67 lung scanning, and serum angiotensin-converting enzyme levels  

SciTech Connect

To find a pretreatment predictor of steroid responsiveness in pulmonary sarcoidosis the authors studied 21 patients before and after steroid treatment by clinical evaluation, pulmonary function tests, bronchoalveolar lavage (BAL), gallium-67 lung scan, and serum angiotensin-converting enzyme (SACE) level. Although clinical score, forced vital capacity (FVC), BAL percent lymphocytes (% lymphs), quantitated gallium-67 lung uptake, and SACE levels all improved with therapy, only the pretreatment BAL % lymphs correlated with the improvement in FVC (r = 0.47, p less than 0.05). Pretreatment BAL % lymphs of greater than or equal to 35% predicted improvement in FVC of 10/11 patients, whereas among 10 patients with BAL % lymphs less than 35%, 5 patients improved and 5 deteriorated. Clinical score, pulmonary function parameters, quantitated gallium-67 lung uptake, and SACE level used alone, in combination with BAL % lymphs or in combination with each other, did not improve this predictive value. The authors conclude that steroid therapy improves a number of clinical and laboratory parameters in sarcoidosis, but only the pretreatment BAL % lymphs are useful in predicting therapeutic responsiveness.

Hollinger, W.M.; Staton, G.W. Jr.; Fajman, W.A.; Gilman, M.J.; Pine, J.R.; Check, I.J.

1985-07-01

198

Clinical characteristics of pulmonary arterial hypertension associated with Down syndrome.  

PubMed

The genetic abnormalities associated with Down syndrome (DS) are still being identified. Few studies have examined the roles of CRELD1 and GATA4 in cardiac abnormalities or their association with pulmonary artery histopathology. Children with DS have an elevated risk of pulmonary arterial hypertension (PAH). This increased risk is likely mainly due to genetic background, the structural characteristics of the pulmonary vascular wall, and certain heart diseases and partly due to pulmonary hypoplasia, upper and lower airway obstructive diseases, chronic infection, and neuromuscular underdevelopment. Exposure to increased left-to-right shunt flow increases sheer stress on endothelium and may induce endothelial dysfunction followed by irreversible remodeling of pulmonary arteries. Pathologic changes include endothelial cell proliferation and thickening of the pulmonary arterial wall due to mechanical responses to the thinner medial smooth muscle cell layer, which includes underdevelopment of alveoli. Production of prostacyclin and nitric oxide is diminished in DS, but endothelin-1 and thromboxane are elevated. Perioperatively, patients with DS may experience pulmonary hypertensive crisis after intracardiac repair and prolonged PAH, and have a poorer response to nitric oxide inhalation. To better manage DS, it is crucial to systematically evaluate the systemic complications of DS. Cardiac catheterization data, particularly those regarding pulmonary arterial resistance, are essential in assessing severity and response to vasodilating agents, preventing postoperative crisis, and evaluating the possibility of intracardiac repair. Advanced therapy with pulmonary vasodilating agents appears effective. Operative risk is similar for individuals with and without DS, except among patients with a complete atrioventricular canal defect. PMID:24689825

Saji, Tsutomu

2014-06-01

199

The Innate Pulmonary Granuloma  

PubMed Central

Granulomas are innate sequestration responses that can be modified by superimposed acquired immune mechanisms. The present study examined the innate stage of pulmonary granuloma responses to bead-immobilized Th1- and Th2-inducing pathogen antigens (Ags), Mycobacteria bovis purified protein derivative (PPD) and Schistosoma mansoni soluble egg Ags (SEA). Compared to a nonpathogen Ag, PPD and SEA bead elicited larger lesions with the former showing accelerated inflammation. Temporal analyses of cytokine and chemokine transcripts showed all Ag beads induced tumor necrosis factor-? mRNA but indicated biased interleukin (IL)-1, IL-6, and IL-12 expression with PPD challenge. All beads elicited comparable levels of CXCL9, CXL10, CCL2, CCL17, and CCL22 mRNA, but PPD beads caused biased CXCL2 CXCL5, CCL3, and CCL4 expression whereas both pathogen Ags induced CCL7. Immunohistochemical, electron microscopic, and flow cytometric analyses showed that Ag beads mobilized CD11c+ dendritic cells (DCs) of comparable maturation. Transfer of DCs from PPD Ag-challenged lungs conferred a Th1 anamnestic cytokine response in recipients. Surprisingly, transfer of DCs from the helminth SEA-challenged lungs did not confer the expected Th2 response, but instead rendered recipients incapable of Ag-elicited IL-4 production. These results provide in vivo evidence that lung DCs recruited under inflammatory conditions favor Th1 responses and alternative mechanisms are required for Th2 commitment. PMID:14982855

Chiu, Bo-Chin; Freeman, Christine M.; Stolberg, Valerie R.; Hu, Jerry S.; Komuniecki, Eric; Chensue, Stephen W.

2004-01-01

200

Lymphocytes from one side of the bovine mammary gland migrate to the contra lateral gland and lymph node tissue.  

PubMed

The four quarters of bovine mammary glands are completely separated and two quarters on each side (right or left) are connected to ipsi lateral supra mammary lymph nodes. It is not clear whether cells infused into the cistern of the mammary gland are capable of migrating to lymph nodes or the general circulation. To examine cell migration, a prescapular lymph node was removed from each of two lactating and three non-lactating dairy cows, and isolated lymphocytes were stained with Hoechst 33342. Autologous stained cells were infused into the mammary gland and then activated by intramammary infusion of zymosan-stimulated serum (source of C5a). After 17 h, Escherichia coli J5 bacterin was infused into the contra lateral mammary gland to mimic infection. After 43 h cows were euthanized and tissue samples (mammary quarters, right and left supra mammary, mesenteric, ileocecal and prescapular lymph nodes, liver and spleen) were collected for microscopic examination as well as flow cytometric analysis. Hoechst stained cells were detected not only in infused quarters, but also in contra lateral quarters as well as in both supra mammary lymph nodes. This indicates that cells infused into the mammary gland migrate to contra lateral tissues and supra mammary lymph nodes. PMID:16111770

Kimura, Kayoko; Harp, James A; Goff, Jesse P; Olsen, Steven C

2005-12-15

201

Pulmonary Function Tests  

PubMed Central

Pulmonary function tests are valuable investigations in the management of patients with suspected or previously diagnosed respiratory disease. They aid diagnosis, help monitor response to treatment and can guide decisions regarding further treatment and intervention. The interpretation of pulmonary functions tests requires knowledge of respiratory physiology. In this review we describe investigations routinely used and discuss their clinical implications. PMID:22347750

Ranu, Harpreet; Wilde, Michael; Madden, Brendan

2011-01-01

202

The pulmonary endothelial cell.  

PubMed Central

The surface of the endothelial cells of the pulmonary trunk of the Wistar albino rat was studied by means of silver preparations and by scanning and transmission electron microscopy. This surface is the site of cytoplasmic projections and the opening of caveolae which together appear to be features associated with the active metabolic rôle of the pulmonary endothelial cell. Images PMID:483185

Heath, D; Smith, P

1979-01-01

203

Downregulation of Key Early Events in the Mobilization of Antigen-bearing Dendritic Cells by Leukocyte Immunoglobulin-like Receptor B4 in a Mouse Model of Allergic Pulmonary Inflammation  

PubMed Central

Leukocyte Immunoglobulin-like Receptor B4 (LILRB4) null mice have an exacerbated T helper cell type 2 (Th2) immune response and pulmonary inflammation compared with Lilrb4+/+ animals when sensitized intranasally with ovalbumin (OVA) and low-dose lipopolysaccharide (LPS) followed by challenge with OVA. Moreover, OVA-challenged Lilrb4?/? mice exhibit greater migration of antigen (Ag)-bearing dendritic cells (DCs) to lymph nodes and accumulation of interleukin 4- and interleukin 5-producing lymph node lymphocytes. The main objective of this study was to determine how the absence of LILRB4 leads to a greater number of DCs in the lymph nodes of Ag-challenged mice and increased lung Th2 inflammation. Mice were sensitized intranasally with PBS alone or containing OVA and LPS; additional cohorts were subsequently challenged with OVA. Expression of chemokine (C-C motif) ligand 21 (CCL21) in the lung was assessed immunohistologically. OVA ingestion and expression of LILRB4 and chemokine (C-C motif) receptor 7 (CCR7) were quantified by flow cytometry. Inhalation of OVA and LPS induced upregulation of LILRB4 selectively on lung Ag-bearing DCs. After sensitization and challenge, the lung lymphatic vessels of Lilrb4?/? mice expressed more CCL21, a chemokine that directs the migration of DCs from peripheral tissue to draining lymph nodes, compared with Lilrb4+/+ mice. In addition, lung DCs of challenged Lilrb4?/? mice expressed more CCR7, the CCL21 receptor. The lungs of challenged Lilrb4?/? mice also contained significantly greater numbers of CD4+ cells expressing interleukin-4 or interleukin-5, consistent with the greater number of Ag-bearing DCs and Th2 cells in lymph nodes and the attendant exacerbated Th2 lung pathology. Our data establish a new mechanism by which LILRB4 can downregulate the development of pathologic allergic inflammation: reduced upregulation of key molecules needed for DC migration leading to decreases in Th2 cells in lymph nodes and their target tissue. PMID:23431396

Fanning, Laura B.; Buckley, Carolyn C.; Xing, Wei; Breslow, Rebecca G.; Katz, Howard R.

2013-01-01

204

Solitary Lymph Node Metastasis in Gastric Cancer  

Microsoft Academic Search

The feasibility and diagnostic reliability of sentinel node (SN) biopsy for gastric cancer are still controversial. We studied\\u000a the clinicopathological features and localization of solitary lymph node metastasis (SLM) in gastric cancer to provide useful\\u000a information for use of the SN concept in gastric cancer. From 2000 to 2004, 3,267 patients with gastric cancer underwent D2\\u000a radical gastrectomy. The clinicopathological

Chen Li; Sungsoo Kim; Ji Fu Lai; Sung Jin Oh; Woo Jin Hyung; Won Hyuk Choi; Seung Ho Choi; Sung Hoon Noh

2008-01-01

205

Effect of long term oxygen treatment at home in children with pulmonary vascular disease.  

PubMed Central

Inhalation of 100% oxygen by nine children with pulmonary vascular disease increased pulmonary blood flow measured at cardiac catheterisation; there was no significant change in pulmonary artery pressure. Fifteen children with pulmonary vascular disease that was severe enough to preclude corrective cardiac operation were studied to determine the effect of long term oxygen treatment on pulmonary vascular disease. Nine received long term domiciliary oxygen for a minimum of twelve hours a day for up to five years. Though the untreated group closely resembled the treated group their survival was significantly less good. All nine treated children are alive whereas five of the six children who did not receive oxygen have died. PMID:3964507

Bowyer, J J; Busst, C M; Denison, D M; Shinebourne, E A

1986-01-01

206

In mammals and birds, low oxygen levels in the lungs cause a constriction of the pulmonary vasculature that increases the  

E-print Network

In mammals and birds, low oxygen levels in the lungs cause a constriction of the pulmonary and birds, low oxygen levels in the lungs cause a constriction of the pulmonary vasculature. This response lung oxygen levels (at a constant FCO of 0.03) on systemic and pulmonary blood flows and pressures

Altimiras, Jordi

207

Inhaled treprostinil and pulmonary arterial hypertension  

PubMed Central

Multiple conditions result in development of pulmonary hypertension. Pulmonary arterial hypertension (PAH) is the subclassification of pulmonary hypertension, in which known or unknown underlying conditions lead to similar intrinsic alterations in the pulmonary vasculature. PAH is a progressive condition characterized by restricted blood flow through the pulmonary circulation leading to poor survival in the absence of effective therapy. Over the last two decades, new therapeutic agents have substantially improved the course and prognosis for PAH patients. Three available classes of drugs, ie, prostacyclins, endothelin receptor antagonists, and phosphodiesterase-5 inhibitors provide multiple options for treatment of PAH. Endothelin receptor antagonists and phosphodiesterase-5 inhibitors are administered orally, whereas prostacyclin therapies are delivered by continuous intravenous or subcutaneous infusion, or as aerosols by nebulization. Because of the risks and inconveniences associated with administration, prostacyclins are typically reserved for patients with more advanced disease or progression despite oral therapy. Inhaled administration may be a safer and easier route for prostacyclin administration. Treprostinil is a prostacyclin analog that has been demonstrated to be effective when administered by continuous subcutaneous or intravenous infusion, and more recently by nebulization. PMID:21191432

Nadler, Samuel T; Edelman, Jeffrey D

2010-01-01

208

Tumor Interstitial Fluid Pressure--A Link between Tumor Hypoxia, Microvascular Density, and Lymph Node Metastasis  

PubMed Central

High microvascular density (MVD) in the primary tumor has been shown to be associated with increased incidence of lymph node metastases and poor clinical outcome. Other investigations have revealed that a large fraction of hypoxic tissue in the primary tumor is associated with metastatic disease and impaired survival. These data are apparently incompatible because tumor hypoxia is primarily a consequence of poor oxygen supply caused by an inadequate vasculature with increased intervessel distances. Here, we provide an explanation of these observations. Human melanoma xenografts were used as preclinical cancer models. Tumors that metastasized to lymph nodes showed higher interstitial fluid pressure (IFP) than those that did not metastasize, and compared with tumors with low IFP, tumors with high IFP showed large hypoxic fractions centrally, high MVD in the periphery, high peritumoral density of lymphatics, and elevated expression of vascular endothelial growth factor A (VEGF-A) and VEGF-C. Significant correlations were found between peripheral MVD and central hypoxia, and lymph node metastasis was associated with high values of both parameters. These findings suggest that the outcome of cancer may be associated with both high MVD and extensive hypoxia in the primary tumor. We propose that proangiogenic factors are upregulated in the tumor center and that the outward interstitial fluid flow caused by the elevated IFP transports these factors to the tumor surface where they evoke hemangiogenesis and lymphangiogenesis, and consequently, that the IFP serves as a link between tumor hypoxia, peripheral tumor hemangiogenesis, peritumoral lymphangiogenesis, and lymph node metastasis. PMID:25117980

Rofstad, Einar K.; Galappathi, Kanthi; Mathiesen, Berit S.

2014-01-01

209

Pulmonary vascular imaging  

SciTech Connect

A wide range of pulmonary vascular imaging techniques are available for the diagnostic evaluation of patients with suspected pulmonary vascular disease. The characteristics of any ideal technique would include high sensitivity and specificity, safety, simplicity, and sequential applicability. To date, no single technique meets these ideal characteristics. Conventional pulmonary angiography remains the gold standard for the diagnosis of acute thromboembolic disease despite the introduction of newer techniques such as digital subtraction angiography and magnetic resonance imaging. Improved noninvasive lower extremity venous testing methods, particularly impedance plethysmography, and ventilation-perfusion scanning can play significant roles in the noninvasive diagnosis of acute pulmonary emboli when properly applied. Ventilation-perfusion scanning may also be useful as a screening test to differentiate possible primary pulmonary hypertension from chronic thromboembolic pulmonary hypertension. And, finally, angioscopy may be a useful adjunctive technique to detect chronic thromboembolic disease and determine operability. Optimal clinical decision-making, however, will continue to require the proper interpretation of adjunctive information obtained from the less-invasive techniques, applied with an understanding of the natural history of the various forms of pulmonary vascular disease and with a knowledge of the capabilities and shortcomings of the individual techniques.

Fedullo, P.F.; Shure, D.

1987-03-01

210

[Intramammary lymph node sentinel metastasis without metastasis in axilla. Axillary lymph node dissection or conservative surgery?].  

PubMed

The sentinel lymph node biopsy is a standard treatment for patients with breast cancer and clinically negative axilla lymph node. The presence of an extra-axillary and intra-axillary (IM) sentinel lymph node (SLN) occurs in up to 2.6% of cases. In the presence of a metastatic IM SLN, axillary positivity may occur in up to 81% of cases. Due to the limited number of cases reported, there is no standard treatment for the association of metastatic SLN IM and non-metastatic axillary SLN . We add here two cases to the literature, one of them with metastatic disease in the axilla. The use of a nomogram demonstrated that the risk of axillary metastasis was less than 10% and the addition of these cases to the literature showed that in this situation the rate of axillary metastasis is 6.25%. We discuss the pros and cons of further axillary dissection in this situation. PMID:23288226

Vieira, René Aloisio da Costa; Viviani, Dionísio Nepomuceno; Ferreira, Suellen Strada; Bailão, Antônio; Kerr, Ligia Maria; Matthes, Angelo Gustavo Zucca; Moriguchi, Sonia Marta

2012-10-01

211

Doppler Flow Patterns in the Right Ventricle-to-Pulmonary Artery Shunt and Neo-aorta in Infants with Single Right Ventricle Anomalies--Impact on Outcome after Initial Staged Palliations  

PubMed Central

Background A Pediatric Heart Network trial compared outcomes in infants with single right ventricle (RV) anomalies undergoing a Norwood procedure randomized to modified Blalock-Taussig shunt (MBTS) or right ventricle-to-pulmonary artery shunt (RVPAS). Doppler patterns in the neo-aorta and RVPAS may characterize physiologic changes after staged palliations that impact outcomes and RV function. Methods Neo-aortic cardiac index (CI), retrograde fraction (RF) in the descending aorta and RVPAS conduit, RVPAS/neo-aortic systolic ejection time (ET) ratio, and systolic/diastolic (S/D) ratio were measured early post-Norwood, prior to stage II palliation and at 14 months. These parameters were compared with transplant-free survival, length of hospital stay, and RV functional indices. Results In 529 subjects (mean follow-up of 3.0±2.1 years), neo-aortic CI and descending aortic RF were significantly higher in the MBTS cohort post-Norwood. The RVPAS RF averaged <25% at both interstage intervals. Higher pre-stage II descending aortic RF correlated with lower RV ejection fraction (R=?0.24; p=0.032) at 14 months for the MBTS cohort. Higher post-Norwood CI (5.6 vs. 4.4 L/min/m2; p=0.04) and lower S/D ratio (1.40 vs. 1.68; p=0.01) correlated with better interstage transplant-free survival for the RVPAS cohort. No other Doppler flow patterns correlated with outcomes. Conclusion After the Norwood procedure, infants tolerate significant descending aortic RF (MBTS) and conduit RF (RVPAS) with little correlation with clinical outcome or RV function. Neo-aortic CI, ET and S/D ratios also have limited correlation with outcome/RV function, but higher post-Norwood neo-aortic CI and lower S/D ratio correlate with better interstage survival in those with an RVPAS. PMID:23540728

Frommelt, Peter C; Gerstenberger, Eric; Baffa, Jeanne; Border, William L; Bradley, Tim J; Colan, Steven; Gorentz, Jessica; Heydarian, Haleh; John, J Blaine; Lai, Wyman W; Levine, Jami; Lu, Jimmy C; McCandless, Rachel T.; Miller, Stephen; Nutting, Arni; Ohye, Richard G; Pearson, Gail D.; Wong, Pierre C; Cohen, Meryl S

2013-01-01

212

Hypoxic pulmonary vasoconstriction in reptiles: a comparative study of four species with different lung structures and pulmonary blood pressures.  

PubMed

Low O2 levels in the lungs of birds and mammals cause constriction of the pulmonary vasculature that elevates resistance to pulmonary blood flow and increases pulmonary blood pressure. This hypoxic pulmonary vasoconstriction (HPV) diverts pulmonary blood flow from poorly ventilated and hypoxic areas of the lung to more well-ventilated parts and is considered important for the local matching of ventilation to blood perfusion. In the present study, the effects of acute hypoxia on pulmonary and systemic blood flows and pressures were measured in four species of anesthetized reptiles with diverse lung structures and heart morphologies: varanid lizards (Varanus exanthematicus), caimans (Caiman latirostris), rattlesnakes (Crotalus durissus), and tegu lizards (Tupinambis merianae). As previously shown in turtles, hypoxia causes a reversible constriction of the pulmonary vasculature in varanids and caimans, decreasing pulmonary vascular conductance by 37 and 31%, respectively. These three species possess complex multicameral lungs, and it is likely that HPV would aid to secure ventilation-perfusion homogeneity. There was no HPV in rattlesnakes, which have structurally simple lungs where local ventilation-perfusion inhomogeneities are less likely to occur. However, tegu lizards, which also have simple unicameral lungs, did exhibit HPV, decreasing pulmonary vascular conductance by 32%, albeit at a lower threshold than varanids and caimans (6.2 kPa oxygen in inspired air vs. 8.2 and 13.9 kPa, respectively). Although these observations suggest that HPV is more pronounced in species with complex lungs and functionally divided hearts, it is also clear that other components are involved. PMID:15961533

Skovgaard, Nini; Abe, Augusto S; Andrade, Denis V; Wang, Tobias

2005-11-01

213

Studying the pulmonary circulation with positron emission tomography  

SciTech Connect

Positron emission tomography and appropriately labeled, short-lived radiopharmaceuticals can be used to study a variety of physiologic processes within the lung. Recently, methods have been developed to measure regional pulmonary blood flow and pulmonary vascular permeability to protein macromolecules. The advantages of these techniques include accurate quantitation, regional data available in an image format, noninvasiveness, and repeatability. These methods have recently been applied to studies of hypoxic vasoconstriction, pulmonary edema, and chronic obstructive lung disease in man and large experimental animals. Although the technology is complex and requires the integration of people from a variety of disciplines, these methods offer a unique opportunity to study in vivo lung physiology.

Schuster, D.P.; Mintun, M.A.

1988-01-01

214

Absent pulmonary valve  

MedlinePLUS

... that bring air to the lungs (bronchi) and cause breathing problems. Other heart defects that can occur with absent pulmonary valve include: Abnormal tricuspid valve Atrial septal defect Double ...

215

Pulmonary function tests  

MedlinePLUS

... measured to estimate the lung volume. To measure diffusion capacity , you breathe a harmless gas, called a ... on your report after pulmonary function tests include: Diffusion capacity to carbon monoxide (DLCO) Expiratory reserve volume ( ...

216

Improved survival after resection of pulmonary metastases from malignant melanoma.  

PubMed

The value of resecting pulmonary metastases from malignant melanoma was retrospectively examined. Between 1981 and 1989, 56 patients (35 men and 21 women with a mean age of 49 years) had 65 pulmonary resections for histologically proven metastatic melanoma after treatment of the primary tumor. In patients undergoing thoracotomy, 50% (28/56) had pulmonary metastases as the initial site of recurrence. Twenty-eight patients (50%) had local-regional recurrence before the development of lung metastases. Eight lobectomies, two segmentectomies, and 55 wedge excisions were done. Fifty-four patients (54/56, 96%) underwent complete resection, and there were no operative deaths. The postthoracotomy actuarial survival was 25% at 5 years (median interval, 18 months). Location of the primary tumor, histology, thickness, Clark level, local-regional lymph node metastases, or type of resection was not associated with improved survival. Patients without regional nodal metastases before thoracotomy had a median survival of 30 months compared with 16 months for all others (p = 0.04). Patients with lung as the site of first recurrence had a median survival of 30 months compared with 17 months for patients with initial local-regional recurrence (p = 0.038, log-rank test). Despite systemic spread, patients with isolated pulmonary metastases from melanoma may benefit from metastasectomy. PMID:1863140

Gorenstein, L A; Putnam, J B; Natarajan, G; Balch, C A; Roth, J A

1991-08-01

217

Pulmonary Hypertension and Computed Tomography Measurement of Small Pulmonary Vessels in  

E-print Network

in chronic obstruc- tive pulmonary disease. The in vivo relationship between pulmonary hypertension estimate the degree of pulmonary hypertension. Keywords: chronic obstructive pulmonary disease; emphysema obstructive pulmonary disease (COPD) (1­3). Vari- ous factors, including endothelial dysfunction, inflammation

218

Idiopathic pulmonary fibrosis  

Microsoft Academic Search

Idiopathic pulmonary fibrosis (IPF) is a non-neoplastic pulmonary disease that is characterized by the formation of scar tissue within the lungs in the absence of any known provocation. IPF is a rare disease which affects approximately 5 million persons worldwide. The prevalence is estimated to be slightly greater in men (20.2\\/100,000) than in women (13.2\\/100,000). The mean age at presentation

Eric B Meltzer; Paul W Noble

2008-01-01

219

Pharmacotherapy of Pulmonary Hypertension  

PubMed Central

Pulmonary arterial hypertension is a serious disease with significant morbidity and mortality. While it can occur idiopathically, it is more commonly associated with other cardiac or lung diseases. While most of the available therapies were tested in adult populations, and most therapies in children remain off-label, new reports and randomized trials are emerging that inform the treatment of pediatric populations. This review discusses currently available therapies for pediatric pulmonary hypertension, their biologic rationales, and evidence for their clinical effectiveness. PMID:23036248

Steinhorn, Robin H.

2012-01-01

220

Gas exchange and pulmonary hypertension following acute pulmonary thromboembolism: has the emperor got some new clothes yet?  

PubMed Central

Abstract Patients present with a wide range of hypoxemia after acute pulmonary thromboembolism (APTE). Recent studies using fluorescent microspheres demonstrated that the scattering of regional blood flows after APTE, created by the embolic obstruction unique in each patient, significantly worsened regional ventilation/perfusion (V/Q) heterogeneity and explained the variability in gas exchange. Furthermore, earlier investigators suggested the roles of released vasoactive mediators in affecting pulmonary hypertension after APTE, but their quantification remained challenging. The latest study reported that mechanical obstruction by clots accounted for most of the increase in pulmonary vascular resistance, but that endothelin-mediated vasoconstriction also persisted at significant level during the early phase. PMID:25006441

2014-01-01

221

CT and PET-CT of a Dog with Multiple Pulmonary Adenocarcinoma  

PubMed Central

ABSTRACT A 10-year-old, intact female Yorkshire terrier had multiple pulmonary nodules on thoracic radiography and ultrasonography with no lesions elsewhere. Computed tomography (CT) and positron emission tomography and computed tomography (PET-CT) using 18F-fluorodeoxyglucose (FDG) were performed to identify metastasis and undetected primary tumors. On CT examination, pulmonary nodules had a hypoattenuating center with thin peripheral enhancement, suggesting ischemic or necrotizing lesion. In PET-CT at 47 min after intravenous injection of 11.1 MBq/kg of FDG, the maximum standardized uptake value of each pulmonary nodule was about from 3.8 to 6.4. There were no abnormal lesions except for four pulmonary nodules on the CT and PET-CT. Primary lung tumor was tentatively diagnosed, and palliative therapy using 2 mg/kg tramadol and 2.2 mg/kg carprofen twice per day was applied. After the dog’s euthanasia due to deteriorated clinical signs and poor prognosis, undifferentiated pulmonary adenocarcinoma was diagnosed through histopathologic and immunochemistry examination. To the best of the authors’ knowledge, this is the first study of CT and PET-CT features of canine pulmonary adenocarcinoma. In this case, multiple pulmonary adenocarcinoma could be determined on the basis of FDG PET-CT through screening the obvious distant metastasis and/or lymph node invasions and excluding unknown primary tumors. PMID:24389742

KIM, Jisun; KWON, Seong Young; CENA, Rohani; PARK, Seungjo; OH, Juyeon; OUI, Heejin; CHO, Kyoung-Oh; MIN, Jung-Joon; CHOI, Jihye

2013-01-01

222

Pulmonary diseases and corticosteroids.  

PubMed

Steroids (corticosteroids) are anti-inflammatory drugs. Corticosteroids are used in many pulmonary conditions. Corticosteroids have a proven beneficial role in asthma, croup (Laryngotracheobronchitis), decreasing the risk and severity of respiratory distress syndrome (RDS), allergic bronchopulmonary aspergillosis, interstitial lung disease, hemangioma of trachea, Pulmonary eosinophillic disorders. Role of corticosteroids is controversial in many conditions e.g. idiopathic pulmonary hemosiderosis, bronchiolitis, hypersensitivity pneumonitis, hyperplasia of thymus, bronchiolitis, acute respiratory distress syndrome, aspiration syndromes, atypical pneumonias, laryngeal diphtheria, AIDS, SARS, sarcoidosis, meconium aspiration syndrome (MAS), pulmonary haemorrhage, bronchitis, bronchiolitis obliterans with organizing pneumonia in JRA, histiocytosis, alpha-1 antitrypsin deficiency, bordtella pertusis, pulmonary involvement in histiocytosis. However these are used empirically in many of these conditions despite lack of clear evidence in favour. There is concern about their side effects, especially on growth. Systemic steroids are associated with significant adverse effects. Pulmonary conditions have a strategic advantage that inhaled corticosteroids are useful in many of these. Although inhaled preparations of corticosteroids have been developed to maximise effective treatment of lung diseases characterised by inflammation and reduce the frequency of harmful effects, these have not been eliminated. There are situations where only systemic steroids are useful. Clinicians must weigh the benefits against the potential detrimental effects. It is recommended that standard protocols for use of steroids available in literature should be followed, always keeping a watch on the potential hazards of prolonged use. PMID:19023529

Sethi, G R; Singhal, Kamal Kumar

2008-10-01

223

Apelin and pulmonary hypertension  

PubMed Central

Pulmonary arterial hypertension (PAH) is a devastating disease characterized by pulmonary vasoconstriction, pulmonary arterial remodeling, abnormal angiogenesis and impaired right ventricular function. Despite progress in pharmacological therapy, there is still no cure for PAH. The peptide apelin and the G-protein coupled apelin receptor (APLNR) are expressed in several tissues throughout the organism. Apelin is localized in vascular endothelial cells while the APLNR is localized in both endothelial and smooth muscle cells in vessels and in the heart. Apelin is regulated by hypoxia inducible factor -1? and bone morphogenetic protein receptor-2. Patients with PAH have lower levels of plasma-apelin, and decreased apelin expression in pulmonary endothelial cells. Apelin has therefore been proposed as a potential biomarker for PAH. Furthermore, apelin plays a role in angiogenesis and regulates endothelial and smooth muscle cell apoptosis and proliferation complementary and opposite to vascular endothelial growth factor. In the systemic circulation, apelin modulates endothelial nitric oxide synthase (eNOS) expression, induces eNOS-dependent vasodilatation, counteracts angiotensin-II mediated vasoconstriction, and has positive inotropic and cardioprotective effects. Apelin attenuates vasoconstriction in isolated rat pulmonary arteries, and chronic treatment with apelin attenuates the development of pulmonary hypertension in animal models. The existing literature thus renders APLNR an interesting potential new therapeutic target for PH. PMID:22140623

Andersen, Charlotte U.; Hilberg, Ole; Mellemkjær, Søren; Nielsen-Kudsk, Jens E.; Simonsen, U.

2011-01-01

224

Black sentinel lymph node and 'scary stickers'.  

PubMed

An unusual case is presented of a young adult patient with two black-stained, radio-nucleotide tracer-active sentinel lymph nodes biopsied following her primary cutaneous melanoma treatment. This was subsequently confirmed to be secondary to cutaneous tattoos, averting the need of an elective regional node dissection. History of tattooing and tattoo removal should therefore be obtained as a routine in all melanoma patients considered for sentinel node biopsy (SLN). SLN biopsy and any subsequent completion node dissection should be strictly staged so that proper histologic diagnosis of the sentinel node is available for correct decision making and treatment. PMID:23010587

Yang, Arthur S; Creagh, Terrence A

2013-04-01

225

Lymph node metastasis in gastric cardiac adenocarcinoma in male patients  

PubMed Central

AIM: To reveal the clinicopathological features and risk factors for lymph node metastases in gastric cardiac adenocarcinoma of male patients. METHODS: We retrospective reviewed a total of 146 male and female patients with gastric cardiac adenocarcinoma who had undergone curative gastrectomy with lymphadenectomy in the Department of Surgery, Xin Hua Hospital and Rui Jin Hospital of Shanghai Jiaotong University Medical School between November 2001 and May 2012. Both the surgical procedure and extent of lymph node dissection were based on the recommendations of Japanese gastric cancer treatment guidelines. Univariate and multivariate analyses of lymph node metastases and the clinicopathological features were undertaken. RESULTS: The rate of lymph node metastases in male patients with gastric cardiac adenocarcinoma was 72.1%. Univariate analysis showed an obvious correlation between lymph node metastases and tumor size, gross appearance, differentiation, pathological tumor depth, and lymphatic invasion in male patients. Multivariate logistic regression analysis revealed that tumor differentiation and pathological tumor depth were the independent risk factors for lymph node metastases in male patients. There was an obvious relationship between lymph node metastases and tumor size, gross appearance, differentiation, pathological tumor depth, lymphatic invasion at pN1 and pN2, and nerve invasion at pN3 in male patients. There were no significant differences in clinicopathological features or lymph node metastases between female and male patients. CONCLUSION: Tumor differentiation and tumor depth were risk factors for lymph node metastases in male patients with gastric cardiac adenocarcinoma and should be considered when choosing surgery. PMID:24115823

Ren, Gang; Chen, Ying-Wei; Cai, Rong; Zhang, Wen-Jie; Wu, Xiang-Ru; Jin, Ye-Ning

2013-01-01

226

EVALUATION OF LYMPH NODE COUNTS IN PRIMARY RETROPERITONEAL LYMPH NODE DISSECTION  

PubMed Central

Background Lymph node counts are a measure of quality assurance and are associated with prognosis for numerous malignancies. To date, investigations of lymph node counts in testis cancer are lacking. Methods Using the Memorial Sloan-Kettering Testis Cancer Database, we identified 255 patients treated with primary retroperitoneal lymph node dissection (RPLND) for nonseminomatous germ cell tumors (NSGCT) between 1999 and 2008. Features associated with node counts, positive nodes, number of positive nodes, and risk of positive contralateral nodes were evaluated with regression models. Results Median (IQR) total node count was 38 (27–53) and was 48 (34 – 61) during the most recent 5 years. Features associated with higher node count on multivariate analysis included high volume surgeon (p=0.034), clinical stage (p=0.036), and more recent year of surgery (p<0.001) while pathologist was not significantly associated with node count (p=0.3). Clinical stage (p<0.001) and total node count (p=0.045) were significantly associated with finding positive nodes on multivariate analysis. The probability of finding positive nodes were 23%, 23%, 31%, and 48% if the total node count was <21, 21 – 40, 41 – 60, and >60, respectively. With a median follow-up of 3.0 years all patients were still alive and 16 patients relapsed while no patient relapsed in the paracaval, interaortocaval, paraaortic, or iliac regions. Conclusion Our results suggest that >40 lymph nodes removed at RPLND improves the diagnostic efficacy of the operation. These results will be useful for future trials comparing RPLND, especially when assessing the adequacy of lymph node dissection. PMID:20665486

Thompson, R. Houston; Carver, Brett S.; Bosl, George J.; Bajorin, Dean; Motzer, Robert; Feldman, Darren; Reuter, Victor E.; Sheinfeld, Joel

2014-01-01

227

Primary lymph node plasmacytomas (plasmacytic lymphomas).  

PubMed

To determine whether primary lymph node plasmacytoma (PLNP) is a distinct entity among other types of plasma cell neoplasia, we analyzed a large series of PLNPs from 2 large lymphoma registries to compare histologic, immunophenotypic, and clinical features of PLNPs, nonnodal extramedullary plasmacytomas, and multiple myeloma. Twenty-five PLNPs (clinical data on 15 cases) were compared with 10 non-lymph node plasmacytomas and 51 cases of multiple myeloma; 36 cases of reactive plasmacytoses were used as controls. The histologic features of PLNP and other extramedullary plasmacytomas were similar. The histologic features of PLNPs were more immature than those of reactive plasmacytoses and less immature than in multiple myeloma. The immunophenotype of PLNPs significantly differed from that of reactive plasmacytoses, other extramedullary plasmacytomas, and multiple myeloma. PLNPs did not progress to multiple myeloma, unlike other extramedullary plasmacytomas, even though survival in PLNPs and other extramedullary plasmacytomas was similar. Our findings suggest that PLNPs may be distinct from other plasma cell dyscrasias. PMID:11190797

Menke, D M; Horny, H P; Griesser, H; Tiemann, M; Katzmann, J A; Kaiserling, E; Parwaresch, R; Kyle, R A

2001-01-01

228

Sensitive, Noninvasive Detection of Lymph Node Metastases  

PubMed Central

Background Many primary malignancies spread via lymphatic dissemination, and accurate staging therefore still relies on surgical exploration. The purpose of this study was to explore the possibility of semiautomated noninvasive nodal cancer staging using a nanoparticle-enhanced lymphotropic magnetic resonance imaging (LMRI) technique. Methods and Findings We measured magnetic tissue parameters of cancer metastases and normal unmatched lymph nodes by noninvasive LMRI using a learning dataset consisting of 97 histologically proven nodes. We then prospectively tested the accuracy of these parameters against 216 histologically validated lymph nodes from 34 patients with primary cancers, in semiautomated fashion. We found unique magnetic tissue parameters that accurately distinguished metastatic from normal nodes with an overall sensitivity of 98% and specificity of 92%. The parameters could be applied to datasets in a semiautomated fashion and be used for three-dimensional reconstruction of complete nodal anatomy for different primary cancers. Conclusion These results suggest for the first time the feasibility of semiautomated nodal cancer staging by noninvasive imaging. PMID:15630471

2004-01-01

229

Pulmonary Pathology: LC22-1 SEVERAL TOPICS OF PULMONARY VASCULITIS AND PULMONARY HEMORRHAGE SYNDROMES.  

PubMed

Vasculitis is defined as inflammation of a vessel wall. Hemorrhage is defined as the escape of blood from vessels. If pulmonary vasculitis and pulmonary hemorrhage are directly connected that inflammation of blood vessels leads to rupture and then hemorrhage, the classification of the pulmonary vasculitis and pulmonary hemorrhage syndromes would be simple. There are many schemes for classifying vasculitis, such as McCluskey 1983, Jennette 1997, Vuong 2002, and Saleh 2005. Classifications can be made by etiology, histologic reaction, size and type of vessels, and associated diseases. Recently CHCC1994 is revised to CHCC 2012. Vasculitis and mimics of pulmonary vasculitis includes idiopathic necrotizing vasculitis syndromes, miscellaneous systemic disorders including collagen-vascular diseases, pulmonary hemorrhage syndromes, vascular involvement in lymphoproliferative disorders, pulmonary hypertensive arterial changes, and granulomatous vasculitis. My presentation reviews all over and focuses on pathological features of pulmonary vasculitis and pulmonary hemorrhage syndromes. PMID:25188158

Matsubara, Osamu

2014-10-01

230

Nitric oxide, oxygen, and prostacyclin in children with pulmonary hypertension  

PubMed Central

Objective—To test the vasodilatory response of the pulmonary vascular bed in children with pulmonary hypertension.?Design—Prospective dose response study in which the effects of inhaled nitric oxide (NO) are compared with those of oxygen and intravenous prostacyclin.?Patients and interventions—The vasodilator test was performed in 20 patients in whom mean pulmonary artery pressure (PAPm) was ? 40 mm Hg and/or pulmonary vascular resistance index was ? 4 Um2. Haemodynamic effects of inhaled NO (20, 40, and 80 ppm) at a fractional inspired oxygen (FiO2) value of 0.3, pure oxygen, oxygen at FiO2 0.9-1.0 combined with NO as above or with intravenous prostacyclin at 10 and 20 ng/kg/min were measured.?Result—NO decreased PAPm with a dose response from 20 to 40 ppm (mean change at 40 ppm ?5.50, 95% confidence interval (CI) ?7.98 to ?3.02 mm Hg). Maximal decrease in the ratio of pulmonary to systemic vascular resistance was achieved with a combination of NO 80 ppm and oxygen (?0.18, 95% CI ?0.26 to ?0.10). Increase in the pulmonary flow index was greatest with pure oxygen in those with an intracardiac shunt (8.52, 95% CI ?0.15 to 17.20 l/min/m2). Neither NO nor oxygen altered systemic arterial pressure but intravenous prostacyclin lowered systemic arterial pressure and resistance.?Conclusions—NO selectively reduces pulmonary vascular resistance and pressure maximally at 40 ppm. Oxygen reduces pulmonary vascular resistance and NO potentiates this reduction without affecting the systemic circulation. Prostacyclin vasodilates the pulmonary and the systemic circulations.?? Keywords: pulmonary hypertension;  nitric oxide;  prostacyclin;  congenital heart disease;  children PMID:9538311

Turanlahti, M; Laitinen, P; Sarna, S; Pesonen, E

1998-01-01

231

[Echocardiographic diagnosis of pulmonary hypertension in chronic lung diseases].  

PubMed

For the time between 1985 and 1990 we found in the literature 14 reports on 483 patients with chronic lung diseases and 140 healthy controls which were investigated by right ventricular catheter and echocardiographic methods. The critical review about ability of echocardiography to recognise the pulmonary hypertension secondary to chronic lung diseases shows following results: 1. Acceleration time (time to peak velocity) revealed correlations to mean or systolic pulmonary artery pressure (SPAP) of -0.72 to -0.92. The sample volume of pulsed Doppler should be taken near the pulmonary valve and in the middle of pulmonary artery diameter. Correction of acceleration time by heart frequency is necessary in children (Akiba). 2. Tricuspid regurgitation to SPAP: r = 0.65-0.92, but sensitivity to recognise pulmonary hypertension was only 20 (to 91)%. Accurate quantitative measurement is possible only in 24 to 66% of the patients with chronic lung diseases. 3. Isovolemic relaxation time: r = 0.70-0.89, limitations by some cardiac influences--but also the ability to reflect effects of medication (Hatle). 4. End-diastolic diameter of tricuspid valve/m2 of body surface: r = 0.84, in connection with right ventricular end-diastolic diameter r = 0.90. Diameters of pulmonary valve, of right pulmonary artery, of right ventricle and characteristics of the flow in the Vena cava inferior have a smaller diagnostic value. Thickness of right ventricular systolic time intervals are without reliable informations about pulmonary hypertension. In conclusion there are some echocardiographic parameters with high diagnostic value in the noninvasive diagnostic of pulmonary hypertension secondary to chronic pulmonary diseases. A table of practicable values and regression equations completes this review. PMID:1579562

Paditz, E

1992-04-01

232

[Pulmonary tuberculosis and other mycobacterial infections in patients with AIDS].  

PubMed

Nowadays, the acquired immune deficiency syndrome (AIDS) is most certainly the major cause of the increased incidence of tuberculosis (TBC). A total of 138 patients (pts) with AIDS were referred to the Department of Infectious Diseases of the Hospital of Pisa, 1990-1991; 14 of them (10.1%) presented pulmonary TBC. In our study, we analyzed the chest films of the latter group of patients. Based on the X-ray patterns, the findings were classified as follows: hilar lymph nodes were observed in 4 pts (28.6%), isolated lymph nodes in 2 cases; associated with parenchymal involvement in 2 pts; acute alveolar TBC was seen in 4 cases (28.6%), with escavations in 3/4 (21.4%). Linear and reticular TBC were found in 4 pts (28.6%), and miliary interstitial involvement in 1 case (7%), extrapulmonary adenopathy in 4 pts (28.6%). In 4 pts (28.6%) chest X-ray findings were negative. All pts underwent serial chest X-rays in the course of therapy. HRCT was performed in 6 patients: our results are in agreement with those reported in literature. Thus, we can conclude that the major diagnostic findings in our series were: frequent isolated involvement of hilar lymph nodes, as observed in primary TBC; the infiltrates are most frequently located in the middle and basal lobes; escavations are uncommon; pleural effusion is unusual; in some pts chest X-ray findings may be negative. PMID:1494676

Pignatelli, V; Savalli, E; Perri, G; Russo, R; Bagnolesi, A; Savino, A

1992-12-01

233

Small Airways in Idiopathic Pulmonary Fibrosis  

PubMed Central

18 patients with idiopathic pulmonary fibrosis were studied to determine if they had morphologic evidence of small airways disease and if physiologic testing could predict morphologic findings. In the presence of normal airway function by standard physiologic studies (forced expiratory volume in 1 s/forced vital capacity and airway resistance by plethysmography), dynamic compliance, maximum expiratory flow-volume curves, and maximum flowstatic recoil curves were measured to detect physiologic alterations consistent with small airways abnormalities. These physiologic data were then compared with estimates of small airways diameter made in lung biopsy specimens. 94% (17 of 18) of the patients had peribronchiolar fibrosis or peribronchiolar inflammation or bronchiolitis. 67% (12 of 18) had an overall estimate of small airways diameter of “narrowed,” whereas 33% (6 of 18) had airways that overall were “not narrowed.” 59% (10 of 17) had frequency-dependent dynamic compliance, 50% (9 of 18) had abnormal maximum expiratory flow-volume curves, and 39% (7 of 18) had abnormal maximum flow-static recoil curves. Comparisons between morphologic and physiologic data revealed a significant correlation between the results of dynamic compliance and the overall estimate of small airways diameter (P = 0.001), and the results of maximum flow-volume curves and the overall estimate of small airways diameter (P = 0.009); there was no significant correlation between the results of maximum flow-static recoil curves and the overall estimate of small airways diameter (P = 0.1). The results of this study suggest that: (a) idiopathic pulmonary fibrosis is a disease of small airways as well as alveoli; (b) dynamic compliance and the maximum expiratory flow-volume curve can predict the overall status of small airways diameter in idiopathic pulmonary fibrosis; and (c) whereas the maximum flowstatic recoil curve predicts the overall estimate of small airways diameter in most patients with this disease, it is the least sensitive of these three monitors of small airways. Images PMID:893665

Fulmer, Jack D.; Roberts, William C.; von Gal, Edwyna R.; Crystal, Ronald G.

1977-01-01

234

Pulmonary complications of hemoglobinopathies.  

PubMed

Hemoglobinopathies are diseases caused by genetic mutations that result in abnormal, dysfunctional hemoglobin molecules or lower levels of normal hemoglobin molecules. The most common hemoglobinopathies are sickle cell disease (SCD) and the thalassemias. In SCD, an abnormal hemoglobin alters the erythrocyte, causing a chronic hemolytic anemia, which can lead to pulmonary parenchymal damage and impaired vascular function. Pulmonary complications of SCD include the acute chest syndrome (ACS), reactive airways disease, pulmonary hypertension (PH), and pulmonary fibrosis. Episodes of ACS and the development of PH both increase the risk of death in patients with SCD. Both ? and ? thalassemia are characterized by impaired production of hemoglobin subunits, and severity of disease varies widely. Although screening studies suggest that PH is a common complication for patients with thalassemia, its impact on survival is unknown. Understanding the pathogenesis, diagnostic options, and prevention and treatment strategies for such complications is critical for clinicians who care for these patients. In this review, we discuss the mechanisms and clinical presentation of pulmonary complications associated with hemoglobinopathies, with a focus on recent advances in pathogenesis and treatment. PMID:20923801

Vij, Rekha; Machado, Roberto F

2010-10-01

235

Human pulmonary dirofilariasis: uncommon cause of pulmonary coin-lesion  

Microsoft Academic Search

Pulmonary dirofilariasis is a rare entity caused by Dirofilaria, a dog worm that is transmitted to humans by mosquitoes. The filarial nematode enters the subcutaneous tissue, travels to the right ventricle, dies and then embolizes the pulmonary vessels causing a small pulmonary infarction, which subsequently appears as a solitary nodule. Although these nodules are usually identified incidentally by chest radiography

Ottavio Rena; Monica Leutner; Caterina Casadio

2002-01-01

236

Dynamics of Neutrophil Migration in Lymph Nodes during Infection  

E-print Network

Immunity Article Dynamics of Neutrophil Migration in Lymph Nodes during Infection Tatyana Chtanova that control neutrophil migration from the blood to sites of infection have been well characterized, little is known about their migration patterns within lymph nodes or the strategies that neutrophils use to find

Nollmann, Marcelo

237

Novel method and applications for labeling and identifying lymph nodes  

NASA Astrophysics Data System (ADS)

The lymphatic system comprises a series of interconnected lymph nodes that are commonly distributed along branching or linearly oriented anatomic structures. Physicians must evaluate lymph nodes when staging cancer and planning optimal paths for nodal biopsy. This process requires accurately determining the lymph node's position with respect to major anatomical landmarks. In an effort to standardize lung cancer staging, The American Joint Committee on Cancer (AJCC) has classified lymph nodes within the chest into 4 groups and 14 sub groups. We present a method for automatically labeling lymph nodes according to this classification scheme, in order to improve the speed and accuracy of staging and biopsy planning. Lymph nodes within the chest are clustered around the major blood vessels and the airways. Our fully automatic labeling method determines the nodal group and sub-group in chest CT data by use of computed airway and aorta centerlines to produce features relative to a given node location. A classifier then determines the label based upon these features. We evaluate the efficacy of the method on 10 chest CT datasets containing 86 labeled lymph nodes. The results are promising with 100% of the nodes assigned to the correct group and 76% to the correct sub-group. We anticipate that additional features and training data will further improve the results. In addition to labeling, other applications include automated lymph node localization and visualization. Although we focus on chest CT data, the method can be generalized to other regions of the body as well as to different imaging modalities.

Kiraly, Atilla P.; Naidich, David P.; Guendel, Lutz; Zhang, Li; Novak, Carol L.

2007-03-01

238

Radioguided Sentinel Lymph Node Biopsy in Breast Cancer Surgery  

Microsoft Academic Search

The concept of sentinel lymph node biopsy in breast cancer surgery relates to the fact that the tumor drains in a logical way through the lymphatic system, from the first to upper levels. Therefore, the first lymph node met (the sentinel node) will most likely be the first to be affected by metastasis, and a negative sentinel node makes it

Giuliano Mariani; Luciano Moresco; Giuseppe Viale; Giuseppe Villa; Marcello Bagnasco; Giuseppe Canavese; John Buscombe; H. William Strauss; Giovanni Paganelli

239

RESEARCH Open Access Proteomic biomarkers predicting lymph node  

E-print Network

of lymph node involvement. Other outcomes were histological type, lymphvascular space involvement (LVSI differentiation between various subtypes of cervical cancer. However, identification of the potential biomarkers, Lymph node, SELDI-TOF MS Background Cervical cancer is the seventh most common cancer in both sexes

240

Current and future treatment of pulmonary hypertension.  

PubMed

Pulmonary hypertension is a disorder characterized by an increase in mean pulmonary arterial pressure (mPAP > 25 mmHg), which is responsible for the transport of blood from the heart to the lungs. Increased pressure leads to decreased flow of blood through the lungs and decreased oxygen deliverance throughout the body. The disorder causes right ventricular hypertrophy and can quickly lead to death, especially with the severe forms of pulmonary hypertension. Symptoms include fatigue, shortness of breath, dizziness and peripheral edema in the lower extremities. Symptoms are usually delayed in appearance and progress slowly, which leads to a late diagnosis and often a poor prognosis. Despite large advances in the last 10 years, there is still about a 15% annual mortality for diagnosed patients. Despite the number of medications available, there are still no cures for this fatal disease. Current therapies include endothelin receptor antagonists, prostacyclin agonists and cGMP-specific 3',5'-cyclic phosphodiesterase (PDE5) inhibitors or combinations. Recent strategies have shown promise in animal models to prevent the onset of pulmonary hypertension when it is induced. However, few of them show a sustained benefit in clinical trials. Strategies for the cure of this debilitating disease should be the focus of future research. PMID:22384453

Pabani, S; Mousa, S A

2012-02-01

241

Chronic Obstructive Pulmonary Disease (COPD)  

MedlinePLUS

... treated? Learn More What is COPD? Chronic Obstructive Pulmonary Disease, or COPD, refers to a group of diseases ... Centers for Disease Control and Prevention. Chronic obstructive pulmonary disease among adults—United States, 2011. MMWR . 2012;61( ...

242

Chronic Obstructive Pulmonary Disease (COPD)  

MedlinePLUS

... COPD > In-Depth Resources > Facts & Figures Chronic Obstructive Pulmonary Disease (COPD) Fact Sheet May 2014 Mortality Prevalence Gender ... Centers for Disease Control and Prevention. Chronic Obstructive Pulmonary Disease Surveillance – United States, 1971-2000 . Morbidity and Mortality ...

243

Drug-induced pulmonary disease  

MedlinePLUS

Drug-induced pulmonary disease is lung disease brought on by a bad reaction to a medicine. ... Maldonado F, Limper AH. Drug-induced pulmonary disease. In: Mason RJ, ... of Respiratory Medicine . 5th ed. Philadelphia, PA: Elsevier ...

244

Chronic Obstructive Pulmonary Disease (COPD)  

MedlinePLUS

... takes no energy to empty the Chronic Obstructive Pulmonary Disease (COPD) is a preventable and treatable disease that ... Education Series © 2013 American Thoracic Society Chronic Obstructive Pulmonary Disease (COPD) AIR FLO W Swelling Restricted air ow ...

245

Pulmonary Function Testing in Children  

MedlinePLUS

... is spirometry? Spirometry is the most common lung function test done. It measures how much air is ... a number like you get when you Pulmonary Function Testing in Children Pulmonary function tests (PFT’s) measure ...

246

Retrograde pulmonary perfusion as an adjunct to standard pulmonary embolectomy for acute pulmonary embolism.  

PubMed

Mortality rates for pulmonary embolectomy in patients with acute massive pulmonary embolism have decreased in recent years. However, it still ranges from 30 to 45% when surgery is performed on critically ill patients, and the mortality rates reach 60% in patients who have experienced a cardiac arrest before the procedure. The causes of death in these patients are generally attributed to right heart failure due to persistent pulmonary hypertension, intractable pulmonary oedema, and massive parenchymal and intrabronchial haemorrhage. Clinical and experimental findings indicate that venous air embolism causes severe or even lethal damage to the pulmonary microvasculature and the lung parenchyma consequent to the release of endothelium-derived cytokines. These findings are similar to those observed when severely compromised patients undergo pulmonary embolectomy for air entrapped in the pulmonary artery during embolectomy, which may lead to fatal outcomes. Retrograde pulmonary perfusion (RPP), besides enabling the removal of residual thrombotic material from the peripheral branches of the pulmonary artery, fills the pulmonary artery with blood and prevents pulmonary air embolism. We believe that the use of RPP as an adjunct to conventional pulmonary embolectomy decreases the morbidity and mortality rates associated with pulmonary embolectomy in critically ill patients. PMID:25298365

Spagnolo, Salvatore; Barbato, Luciano; Grasso, Maria Antonia; Tesler, Ugo Filippo

2014-09-01

247

Development of pulmonary vascular response to oxygen  

SciTech Connect

The ability of the pulmonary circulation of the fetal lamb to respond to a rise in oxygen tension was studied from 94 to 146 days of gestation. The unanesthetized ewe breathed room air at normal atmospheric pressure, followed by 100% oxygen at three atmospheres absolute pressure in a hyperbaric chamber. In eleven near-term lambs, fetal arterial oxygen tension (Pa{sub O{sub 2}}) increased from 25 to 55 Torr, which increased the proportion or right ventricular output distributed to the fetal lungs from 8 to 59%. In five very immature lambs fetal Pa{sub O{sub 2}} increased from 27 to 174 Torr, but the proportion of right ventricular output distributed to the lung did not change. In five of the near-term lambs, pulmonary blood flow was measured. For each measurement of the distribution of blood flow, approximately 8 {times} 10{sup 5} spheres of 15-{mu}m diameter, labeled with either {sup 153}Gd, {sup 113}Sn, {sup 103}Ru, {sup 95}Nb, or {sup 46}Sc were injected. It increased from 34 to 298 ml {center dot} kg fetal wt{sup {minus}1} {center dot} min{sup {minus}1}, an 8.8-fold increase. The authors conclude that the pulmonary circulation of the fetal lamb does not respond to an increase in oxygen tension before 101 days of gestation; however, near term an increase in oxygen tension alone can induce the entire increase in pulmonary blood flow that normally occurs after the onset of breathing at birth.

Morin, F.C. III, Egan, E.A.; Ferguson, W.; Lundgren, C.E. (State Univ. of New York, Buffalo (USA))

1988-03-01

248

[Pulmonary nodules and arachnophobia].  

PubMed

Pulmonary nodules are a common reason for consultation and their investigation must always exclude a possible neoplastic cause. This means that, in addition to a thorough history, investigations may be necessary which are sometimes invasive and therefore potentially a cause of iatrogenic harm. The toxic aetiologies for pulmonary nodules are rare. We report a case of a patient with pulmonary nodules occurring predominantly in the right lung, about 1cm in diameter, non-cavitating without calcification, and sometimes surrounded by a peripheral halo. The nodules were a chance finding during preoperative evaluation. After a comprehensive review, a reaction to an inhaled irritant was the preferred hypothesis, specifically overuse of a compound insecticide containing, in addition to the propellant gas and solvent type hydrocarbon - a mixture of piperonyl butoxide, of esbiothrine and permethrin. Removal of this led to the complete disappearance of nodules. Pathological examination identified bronchiolitis obliterans with organising pneumonia accompanied by non-necrotizing granulomas and lipid vacuoles. PMID:24461445

Colinet, B; Dargent, J-L; Fremault, A

2014-01-01

249

Neonatal Pulmonary Hemosiderosis  

PubMed Central

Idiopathic pulmonary hemosiderosis (IPH) is a rare complex entity characterized clinically by acute or recurrent episodes of hemoptysis secondary to diffuse alveolar hemorrhage. The radiographic features are variable, including diffuse alveolar-type infiltrates, and interstitial reticular and micronodular patterns. We describe a 3-week-old infant presenting with hemoptysis and moderate respiratory distress. Idiopathic pulmonary hemosiderosis was the first working diagnosis at the Emergency Department and was confirmed, 2 weeks later, by histological studies (bronchoalveolar lavage). The immunosuppressive therapy by 1?mg/kg/d prednisone was immediately started, the baby returned home on steroid therapy at a dose of 0,5?mg/kg/d. The diagnosis of idiopathic pulmonary hemosiderosis should be evocated at any age, even in the neonate, when the clinical presentation (hemoptysis and abnormal radiological chest images) is strongly suggestive. PMID:25389504

Limme, Boris; Nicolescu, Ramona; Misson, Jean-Paul

2014-01-01

250

STUDIES ON PULMONARY EDEMA  

PubMed Central

1. Bilateral cervical vagotomy in rabbits soon leads to death, usually within 8 to 24 hours. 2. Gradually increasing dyspnea, crises with expulsion of frothy, serous or sanguineous fluid from the mouth and nose, and terminal asphyxia are the important clinical features. 3. Postmortem examination reveals severe acute pulmonary edema and congestion, variable amounts of bronchopneumonia, and evidences of aspiration of food and secretions. This picture is similar to that found in the lungs in the bulbar form of poliomyelitis. 4. These changes are brought about by a combination of factors secondary to bilateral vagotomy: laryngeal paralysis (aspiration of food, slow asphyxia); loss of the vagal innervation of the lungs. 5. Laryngeal paralysis is not an essential factor in the production of severe pulmonary edema and death following bilateral cervical vagotomy. 6. To denote the pathogenesis of this type of edema, the term neuropathic pulmonary edema is employed. PMID:19870671

Farber, Sidney

1937-01-01

251

Characterization of sheep lung lymph lipoproteins: chemical and physical properties  

SciTech Connect

The authors have determined the composition and distribution of plasma and lung lymph lipoproteins from unanesthetized ewes. Cholesterol, triglyceride, and phospholipid levels in lung lymph were 45%, 50%, and 50%, respectively, of those in plasma. Lipoproteins from both lymph and plasma were separated into two major fractions: d < 1.063 g/ml or LDL, and d 1.063-1.21 g/ml or HDL. HDL was the major lipoprotein species in the plasma and lymph. Gradients gel electrophoresis of HDL on 4-30% gels showed that, in lymph, HDL particles were shifted to larger sizes; in addition to a peak at 8.5 nm, which was similar to plasma HDL, there were two additional components of larger size, one at 9.2 nm and the other at 12 nm. Electron microscopy revealed that lymph HDL contained two new particles not seen in plasma: large, round particles, 13.6 nm diameter, and discoidal particles, 18.7 by 4.9 nm, long and short axis, respectively. Compositional analysis of lymph HDL revealed a relative enrichment in free cholesterol as well as an enrichment in apolipoprotein E. Lymph LDL on gradient gel electrophoresis was extremely heterogeneous. Several peaks were evident in the 23-30 nm size range (similar to plasma LDL), but a supplementary component at approximately 15-16 nm was also present. Whereas plasma LDL on electron microscopy contained only round particles 26 nm in diameter, lymph contained an additional, unusual particle which was close-packed, with square geometry, and was 15 nm in diameter. Changes in the physical and chemical properties of lung lymph lipoproteins suggest that these particles are metabolically modified.

Forte, T.M.; Cross, C.E.; Gunther, R.A.; Kramer, G.C.

1983-01-01

252

Congenital Pulmonary Alveolar Proteinosis  

PubMed Central

Pulmonary alveolar proteinosis (PAP) is a rare syndrome characterized by pulmonary surfactant accumulation within the alveolar spaces. It occurs with a reported prevalence of 0.1 per 100,000 individuals. Two clinically different pediatric types have been defined as congenital PAP which is fatal and a late-onset PAP which is similar to the adult form and less severe. The clinical course of PAP is variable, ranging from spontaneous remission to respiratory failure. Whole-lung lavage is the current standard treatment for PAP patients. We report a new congenital case of PAP. PMID:23710403

Hammami, Saber; Harrathi, Khaled; Lajmi, Khaled; Hadded, Samir; Ben Meriem, Chebil; Guediche, Mohamed Neji

2013-01-01

253

Lymph node flap based on the right transverse cervical artery as a donor site for lymph node transfer.  

PubMed

Lymph node transfer is a novel technique in lymphedema surgery. In this study, we present our experience in harvesting lymph nodes flap based on the right transverse cervical artery. In a period of 7 months, we harvested 11 cervical lymph node flaps based on the right transverse cervical artery (TCA). The reliable anatomy of the TCA and the low complication rate of the donor site make this lymph node flap ideal for transfer in the treatment of lymphedema. Knowledge of the regional anatomy and the anatomic variations of the TCA are mandatory for safe dissection of this flap. We also present the preliminary results of our first 2 cases in which we performed cervical lymph node transfer for secondary lower extremity lymphedema. PMID:23759964

Sapountzis, Stamatis; Singhal, Dhruv; Rashid, Abid; Ciudad, Pedro; Meo, Domenico; Chen, Hung-Chi

2014-10-01

254

Effect of lymph node micrometastases on prognosis of gastric carcinoma  

PubMed Central

AIM: To evaluate the relationship between lymph node micrometastases and prognosis of patients with gastric carcinoma and to evaluate the significance of the new assessment of nodal status in determining the pN categories in the 5th edition of the UICC TNM classification. METHODS: A total of 850 lymph nodes from 30 patients with gastric carcinoma who underwent gastrectomy with lymphadenectomy were assessed by reverse transcription polymerase chain reaction assay in addition to histologic examination. Cytokeratin-20 gene marker was used in this assay. RESULTS: Routine examination by HE staining confirmed metastasis in 233 lymph nodes from 20 patients. All these 233 lymph nodes were cytokeratin-20 positive. Moreover, lymph node micrometastases were detected in an additional 67 lymph nodes in 12 of these 20 patients. Lymph node micrometastases were also detected in 10 lymph nodes from 2 of 10 patients who had no obvious metastases identified by HE staining. Totally, lymph node micrometastases were identified by the reverse transcription polymerase chain reaction assay in 77 (12.5%) lymph nodes from 14 (46.7%) patients with gastric carcinoma. Of 27 patients who underwent curative resection, 7 (25.9%) were up-staged (fromIB stage to II stage in 1 patient, from IB stage to IIIA stage in 1 patient, from II stage to IIIA stage in 1 patient, from IIIA stage to IIIB stage in 1 patient, from IIIA stage to IV stage in 1 patient, from IIIB stage to IV stage in 2 patients). In a median follow-up of 32 (range 8-36) mo, Kaplan-Meier survival analysis showed significant improvements in median survival (22.86 ± 3.17 mo, 95% CI: 16.64-29.08 mo vs 18.00 ± 7.4 mo, 95% CI: 3.33-32.67 mo) of patients with negative lymph node micrometastases over patients with positive lymph node micrometastases (log-rank, P < 0.05). CONCLUSION: Lymph node micrometastases have a significant impact on the current staging system of gastric carcinoma, and are significant risk factors for prognosis of patients with gastric carcinoma. PMID:17696234

Wu, Ze-Yu; Li, Jing-Hua; Zhan, Wen-Hua; He, Yu-Long; Wan, Jin

2007-01-01

255

T cell-mediated immunity in the lung: a Cryptococcus neoformans pulmonary infection model using SCID and athymic nude mice.  

PubMed Central

T cells are important in systemic anticryptococcal defenses, but a role in controlling an initial pulmonary infection has not been demonstrated. A murine model with intratracheal inoculation was developed to study the acquisition and expression of pulmonary T cell-mediated immunity against Cryptococcus neoformans. Infections with four strains of C. neoformans (305, 68A, 613D, and 52D) in two strains of mice (BALB/c and C57BL/6) were examined. Unencapsulated strain 305 and slowly growing strain 68A were readily controlled apparently by nonimmune pulmonary defenses, and no extrapulmonary dissemination was detected. Strain 613D grew progressively in the lungs and disseminated to the brain and spleen. Strain 52D initially grew rapidly in the lungs and disseminated to the spleen, but a clearance mechanism developed in the lungs after day 7 postinfection and in the spleen after day 28. SCID and athymic nude mice were unable to clear a strain 52D pulmonary infection, and a lethal disseminated infection occurred. Pulmonary clearance could be adoptively transferred into SCID mice infected with strain 52D by use of immune T cells from the spleen and lungs and hilar lymph nodes of infected immunocompetent donors. Furthermore, pulmonary clearance was almost 100-fold better in SCID mice that received immune T cells from the lungs and hilar lymph nodes than in those that received immune T cells from the spleen, even though equivalent levels of delayed-type hypersensitivity were transferred by both cell populations. These adoptive transfer studies suggested that the lung and hilar lymph node T cells from immune animals either are enriched in such a way as to mediate protective immunity or home to the lungs better than do splenic T cells. PMID:1825990

Huffnagle, G B; Yates, J L; Lipscomb, M F

1991-01-01

256

Follicular lymphoma mimicking marginal zone lymphoma in lymph node: a case report  

PubMed Central

Nodal follicular lymphoma (FL) is typically composed of follicular or nodular proliferation of small cleaved lymphoid cells, presumably derived from germinal center (GC) B cells. The hallmark of FL is t(14;18)(q32;q21) chromosomal translocation, which juxtaposes anti-apoptotic gene BCL2 to immunoglobulin heavy chain (IGH) promoter. Reflecting this background, FL cells are immunohistochemically positive for BCL2 as well as GC B cell markers CD10 and BCL6. It is known that low grade B-cell lymphomas, including FL, chronic lymphocytic leukemia/small lymphocytic lymphoma, and marginal zone lymphoma, are sometimes associated with marginal zone differentiation or plasmacytic differentiation. The marginal zone differentiation obscures the morphological differences among these, providing diagnostic challenges for histopathologists. In this paper, we present a case of FL, originally mimicking marginal zone lymphoma in the axillary lymph node. Subsequent bone marrow biopsy showed paratrabecular infiltration of small to medium-sized lymphoid cells. Immunohistochemical analysis of the bone marrow biopsy together with histopathology and flow cytometry of the axillary lymph node led to a final diagnosis of FL with marginal zone differentiation in the axillary lymph node and its bone marrow infiltration. Our case illustrates and reconfirms the importance of clinicopathological correlation which leads to a correct diagnosis.

Matsuda, Ikuo; Shimizu, Yoshifumi; Okamoto, Takahiro; Hirota, Seiichi

2014-01-01

257

[Therapy of pulmonary arteriovenous aneurysm].  

PubMed

Connections of branches of the pulmonary artery to branches of the pulmonary vein resulting in aneurysmatic dilatation are defined as pulmonary arterio-venous aneurysm (pava). The spontaneous course shows a morbidity of 26% and a mortality of 11% within a six-year observation period following diagnosis. If there is an arterial branch with small diameter (< 15 mm) we recommend the embolisation with the catheter; this procedure is less stressing for the patient and does not involve the loss of pulmonary tissue. If the arterial branch has a big diameter, if a complex pava or a pulmonary abscess is present a conventional surgical resection should be envisaged. PMID:8226048

Mouton, W; Würsten, H U; Kipfer, B; Im Hof, V; Triller, J; Althaus, U

1993-09-01

258

Pulmonary arteriovenous malformations.  

PubMed

Pulmonary arteriovenous malformations (PAVMs) are abnormal vascular structures that most often connect a pulmonary artery to a pulmonary vein, bypassing the normal pulmonary capillary bed and resulting in an intrapulmonary right-to-left shunt. As a consequence, patients with PAVM can have hypoxemia and paradoxical embolization complications, including stroke and brain abscess. PAVMs may be single or multiple, unilateral or bilateral, and simple or complex. Most PAVMs are hereditary and occur in hereditary hemorrhagic telangiectasia, an autosomal dominant vascular disorder, and screening for PAVM is indicated in this subgroup. PAVMs may also be idiopathic, occur as a result of trauma and infection, or be secondary to hepatopulmonary syndrome and bidirectional cavopulmonary shunting. Diagnostic testing involves identifying an intrapulmonary shunt, with the most sensitive test being transthoracic contrast echocardiography. Chest CT scan is useful in characterizing PAVM in patients with positive intrapulmonary shunting. Transcatheter embolotherapy is the treatment of choice for PAVM. Lifelong follow-up is important because recanalization and collateralization may occur after embolization therapy. Surgical resection is rarely necessary and reserved for patients who are not candidates for embolization. Antibiotic prophylaxis for procedures with a risk of bacteremia (eg, dental procedures) is recommended in all patients with PAVM because of the risk of cerebral abscess. PMID:24008954

Cartin-Ceba, Rodrigo; Swanson, Karen L; Krowka, Michael J

2013-09-01

259

Pulmonary thromboembolism in children  

Microsoft Academic Search

Pulmonary thromboembolism (PTE) is uncommonly diagnosed in the pediatric patient, and indeed often only discovered on autopsy. The incidence of pediatric PTE depends upon the associated underlying disease, diagnostic tests used, and index of suspicion. Multiple risk factors can be found including: peripartum asphyxia, dyspnea, haemoptysis, chest pain, dehydration, septicemia, central venous lines (CVLs), trauma, surgery, ongoing hemolysis, vascular lesions,

Paul S. Babyn; Harpal K. Gahunia; Patricia Massicotte

2005-01-01

260

Pulmonary complications after esophagectomy  

Microsoft Academic Search

Background. Pulmonary complications are common in patients who have undergone esophagectomy. There are no good predictive variables for these complications. In addition, the role that preoperative treatment with chemotherapy and radiation may play in postoperative complications remains unclear.Methods. We performed a retrospective review of all patients who underwent esophagectomy by a single surgeon at our institution over a 6-year period.

Christopher E Avendano; Patrick A Flume; Gerard A Silvestri; Lydia B King; Carolyn E Reed

2002-01-01

261

Idiopathic pulmonary artery aneursym.  

PubMed

Idopathic pulmonary artery aneurysm (PAA) is a rare lesion. Clinical experience with this condition is limited and current knowledge is mainly derived from autopsy findings. We report a patient who came to us with complaints of chest pain, breathlessness on exertion and pedal oedema and was diagnosed to have PAA. PMID:24930208

Singh, Urvinderpal; Singh, Kulbir; Aditi; Singh, Parminderpal; Aneja, Pooja

2014-01-01

262

Cardiac and Pulmonary Injury  

Microsoft Academic Search

Cardiac and pulmonary injuries present major chal- lenges in diagnosis and treatment. Distinct differences between penetrating and blunt trauma of these or- gans exist. Outcomes for severe injuries are still grave. Organized trauma systems can provide optimal care by minimizing prehospital time, allowing easy access to imaging modalities, and offering state-of-the-art treatment strategies. A multidisciplinary approach, including surgeons, intensivists, and

George C. Velmahos; Muhammad U. Butt

2008-01-01

263

Cytokines and Pulmonary Fibrosis  

Microsoft Academic Search

In the past several years, significant progress in many aspects of pulmonary fibrosis research has been made. Among them, the finding that a variety of cytokines play important roles in the complex process appears most intriguing. These cytokines include at least transforming growth factor-? (TGF-?), tumor necrosis factor-? (TNF-?), platelet-derived growth factor, fibroblast growth factors, (TGF-?), interleukin-1, monocyte chemoattractant protein-1

Kai Zhang; Sem H. Phan

1996-01-01

264

Whole Proteome Analysis of Mouse Lymph Nodes in Cutaneous Anthrax  

PubMed Central

This study aimed to characterize a soluble proteome of popliteal lymph nodes during lymphadenitis induced by intradermal injection of Bacillus anthracis Sterne spores in mice using tandem LC-MS/MS and reverse-phase protein microarray with antibodies specific to epitopes of phosphorylated proteins. More than 380 proteins were detected in the normal intra-nodal lymph, while the infectious process resulted in the profound changes in the protein abundances and appearance of 297 unique proteins. These proteins belong to an array of processes reflecting response to wounding, inflammation and perturbations of hemostasis, innate immune response, coagulation and fibrinolysis, regulation of body fluid levels and vascular disturbance among others. Comparison of lymph and serum revealed 83 common proteins. Also, using 71 antibodies specific to total and phosphorylated forms of proteins we carried initial characterization of circulating lymph phosphoproteome which brought additional information regarding signaling pathways operating in the lymphatics. The results demonstrate that the proteome of intra-nodal lymph serves as a sensitive sentinel of the processes occurring within the lymph nodes during infection. The acute innate response of the lymph nodes to anthrax is accompanied by cellular damage and inflammation with a large number of up- and down-regulated proteins many of which are distinct from those detected in serum. MS data are available via ProteomeXchange with identifier PXD001342. PMID:25329596

Zhou, Weidong; Mueller, Claudius; Liotta, Lance; Popov, Serguei G.

2014-01-01

265

Prospective study of sentinel lymph node biopsy for conjunctival melanoma  

PubMed Central

Background To report our experience with sentinel lymph node biopsy for staging patients with conjunctival melanoma. Methods A prospective review of patients with conjunctival melanoma who underwent sentinel lymph node biopsy at St Bartholomew's Hospital from May 2008 to May 2012. The selection criterion for sentinel node biopsy depended on the tumour thickness (?2?mm) and location of the conjunctival melanoma. The main outcome measures were the incidence of sentinel lymph node positivity and the procedure-related complications. Results In 4?years, 26 out of 70 patients met the selection criteria for sentinel lymph node biopsy. 4 patients declined and 22 patients consented for the procedure. Technetium-99m failed to identify a sentinel lymph node in four of the 22 patients (18%). Of the remaining 18 patients, two were found to have subclinical micrometastasis in regional lymph nodes. Median follow-up was 20?months (range 6–36?months). No false-negative events were observed. Complications of the procedure included transient blue staining of the epibulbar surface in five patients and transient facial nerve palsy in one patient. Conclusions Sentinel lymph node biopsy is a safe procedure with minimal complications. It should be considered for the staging of conjunctival melanomas, especially melanomas in non-limbal location or conjunctival melanomas ?2?mm thick. PMID:24064944

Cohen, Victoria M L; Tsimpida, Maria; Hungerford, John L; Jan, Hikmat; Cerio, Rino; Moir, Graeme

2013-01-01

266

Oral malignant melanoma detected after resection of amelanotic pulmonary metastasis?  

PubMed Central

INTRODUCTION Solitary pulmonary metastasis from oral malignant melanoma is very rare. PRESENTATION OF CASE We demonstrated a 84-year-old patient with a lung nodule that was diagnosed as malignant melanoma by video-assisted thoracoscopic resection. Because primary pulmonary malignant melanoma was extremely rare, the tumor was thought to be a metastasized from an occult primary lesion. A detailed physical examination revealed a black tumor in the oral cavity, and this was suspected to have been the primary. Resection of the hard palate tumor and dissection of the cervical lymph nodes were performed. The patient was simply followed up without further therapy at his request, and he died one year after surgery due to bleeding from a pleural metastasis of malignant melanoma. DISCUSSION Primary melanoma of the oral cavity is rare, accounts for 0.5% of all oral cancers, and 0.8–1.8% of all melanomas. Because of absence of symptoms in the early stage of the disease and the presence of the tumor in relatively obscure areas of the oral cavity, the diagnosis is unfortunately often delayed. In view of the rarity of primary lung melanoma, when lung tumor was diagnosed as malignant melanoma, detailed physical examination of the entire skin and mucosa including the oral cavity was necessary. CONCLUSION Oral malignant melanoma was very rare, but oral cavity should be examined when the pulmonary nodule was diagnosed as malignant melanoma. PMID:24189568

Matsuoka, Katsunari

2013-01-01

267

Prevalence of undiagnosed chronic thromboembolic pulmonary hypertension after pulmonary embolism.  

PubMed

Chronic thromboembolic pulmonary hypertension is associated with adverse prognosis. Early diagnosis is important to better identify patients who would benefit from a well established therapeutic strategy. The purpose of our study was to evaluate long-term incidence of undiagnosed chronic thromboembolic pulmonary hypertension after acute pulmonary embolism and the utility of a long-term follow-up including an echocardiographic-based screening programme to early detect this disease. We evaluated retrospectively 282 patients discharged from the 'Maggiore della Carità' Hospital, Università del Piemonte Orientale, Novara, Italy, with diagnosis of acute pulmonary embolism between November 2006 and October 2009. One hundred and eleven patients underwent a clinical late echocardiographic screening programme after the acute event. Patients with suspected pulmonary hypertension based on echocardiographic evidence of systolic pulmonary artery pressure of at least 40?mmHg underwent complete work-up for chronic thromboembolic pulmonary hypertension assessment, including ventilation-perfusion lung scintigraphy and right heart catheterization.One hundred and eleven patients were included in the study. Pulmonary hypertension was suspected in 15 patients; five patients had chronic thromboembolic pulmonary hypertension confirmed by ventilation-perfusion lung scintigraphy, right heart catheterization and pulmonary angiography. Two patients with clinical class functionally advanced underwent surgical pulmonary endarterectomy and two asymptomatic patients underwent medical treatment. The prevalence of undiagnosed chronic thromboembolic pulmonary hypertension was 4.5%.Chronic thromboembolic pulmonary hypertension is a serious disease with a poor prognosis if not treated early. Surgical treatment is decisive. After surgery, the majority of patients have a substantial improvement in their functional status and in haemodynamic variables. Many patients are asymptomatic. Implementation of screening programmes may be helpful for an early diagnosis and early proper therapy. PMID:24566335

Giuliani, Livio; Piccinino, Cristina; D'Armini, Maria A; Manganiello, Sabrina; Ferrarotti, Lorena; Balbo, Piero E; Lupi, Alessandro; Marino, Paolo N

2014-10-01

268

Regional pulmonary perfusion following human heart-lung transplantation  

SciTech Connect

Ventilation and perfusion scans were obtained in six subjects who had undergone heart-lung transplantation with consequent denervation of the cardiopulmonary axis. Two of the subjects had developed obliterative bronchiolitis, which is believed to be a form of chronic rejection. Their pulmonary function tests demonstrated airflow obstruction and their scintigraphic studies were abnormal. In the remaining four subjects without obstructive airways disease, ventilation and planar perfusion scans were normal. Single photon emission computed tomography imaging of pulmonary perfusion in these patients revealed a layered distribution of blood flow indistinguishable from that of normal individuals. It is concluded that neurogenic mechanisms have little influence on the pattern of local pulmonary blood flow at rest.

Lisbona, R.; Hakim, T.S.; Dean, G.W.; Langleben, D.; Guerraty, A.; Levy, R.D. (Royal Victoria Hospital, Montreal, Quebec (Canada))

1989-08-01

269

Altered Cerebral Angiogenesis in a Fetal Lamb Model of Persistent Pulmonary Hypertension  

E-print Network

impairments including cerebral palsy and mental retardaSon2. We have previouslyAltered Cerebral Angiogenesis in a Fetal Lamb Model of Persistent Pulmonary studies on cerebral blood flow and pressure are warranted to explain

270

Pulmonary arterial hypertension  

PubMed Central

Pulmonary arterial hypertension (PAH) is a chronic and progressive disease leading to right heart failure and ultimately death if untreated. The first classification of PH was proposed in 1973. In 2008, the fourth World Symposium on PH held in Dana Point (California, USA) revised previous classifications. Currently, PH is devided into five subgroups. Group 1 includes patients suffering from idiopathic or familial PAH with or without germline mutations. Patients with a diagnosis of PAH should systematically been screened regarding to underlying mutations of BMPR2 gene (bone morphogenetic protein receptor type 2) or more rarely of ACVRL1 (activine receptor-like kinase type 1), ENG (endogline) or Smad8 genes. Pulmonary veno occusive disease and pulmonary capillary hemagiomatosis are individualized and designated as clinical group 1'. Group 2 'Pulmonary hypertension due to left heart diseases' is divided into three sub-groups: systolic dysfonction, diastolic dysfonction and valvular dysfonction. Group 3 'Pulmonary hypertension due to respiratory diseases' includes a heterogenous subgroup of respiratory diseases like PH due to pulmonary fibrosis, COPD, lung emphysema or interstitial lung disease for exemple. Group 4 includes chronic thromboembolic pulmonary hypertension without any distinction of proximal or distal forms. Group 5 regroup PH patients with unclear multifactorial mechanisms. Invasive hemodynamic assessment with right heart catheterization is requested to confirm the definite diagnosis of PH showing a resting mean pulmonary artery pressure (mPAP) of ? 25 mmHg and a normal pulmonary capillary wedge pressure (PCWP) of ? 15 mmHg. The assessment of PCWP may allow the distinction between pre-capillary and post-capillary PH (PCWP > 15 mmHg). Echocardiography is an important tool in the management of patients with underlying suspicion of PH. The European Society of Cardiology and the European Respiratory Society (ESC-ERS) guidelines specify its role, essentially in the screening proposing criteria for estimating the presence of PH mainly based on tricuspid regurgitation peak velocity and systolic artery pressure (sPAP). The therapy of PAH consists of non-specific drugs including oral anticoagulation and diuretics as well as PAH specific therapy. Diuretics are one of the most important treatment in the setting of PH because right heart failure leads to fluid retention, hepatic congestion, ascites and peripheral edema. Current recommendations propose oral anticoagulation aiming for targeting an International Normalized Ratio (INR) between 1.5-2.5. Target INR for patients displaying chronic thromboembolic PH is between 2–3. Better understanding in pathophysiological mechanisms of PH over the past quarter of a century has led to the development of medical therapeutics, even though no cure for PAH exists. Several specific therapeutic agents were developed for the medical management of PAH including prostanoids (epoprostenol, trepoprostenil, iloprost), endothelin receptor antagonists (bosentan, ambrisentan) and phosphodiesterase type 5 inhibitors (sildenafil, tadalafil). This review discusses the current state of art regarding to epidemiologic aspects of PH, diagnostic approaches and the current classification of PH. In addition, currently available specific PAH therapy is discussed as well as future treatments. PMID:23829793

2013-01-01

271

Hantavirus Pulmonary Syndrome  

PubMed Central

A recent outbreak of a severe pulmonary disease in the southwestern United States was etiologically linked to a previously unrecognized bantavirus. The virus has been isolated from its majorreservoir, the deer mouse, Peromyscus maniculatus,and recently named Sin Nombre virus. Clinically, the disease has become known as the bantavirus pulmonary syndrome (HPS). Since May 1993, 44 fatal cases of HPS have been identified through clinicopathological review and immunobistochemical(IHC) testing of tissues from 273 patients who died of an unexplained noncardiogenic pulmonary edema. In 158 cases for which suitable specimens were available, serologicaltesting and/or reverse transcription-polymerase chain reaction (RT-PCR) amplification of extracted RNA was also performed. IHC, serological, and PCR results were concordant for virtually all HPS and non-HPS patients when more than one assay was performed. The prodromal ilness of HPS is similar to that of many other viral diseases. Consistent bematological features include thrombocytopenia, bemoconcentration, neutropbilic leukocytosis with a left shift, and reactivel lymphocytes. Pulmonary bistopatbological features were similar in most of the fatal HPS cases (40/44) and consisted of an interstitial pneumonitis with a variable mononuclear cell infiltrate, edema, and focal byaline membranes. In four cases, bowever, pulmonary features were significantly different and included diffuse alveolar damage and variable degrees of severe air space disorganization. IHC analysis showed widespread presence of bantaviral antigens in endothelial cells of the microvasculature, particularly in the lung. Hantaviral antigens were also observed within follicular dendritic cells, macrophages, and lymphocytes. Hantaviral inclusions were observed in endothelial cells of lungs by thinsection electron microscopy, and their identity was verified by immunogold labeling. Virus-like particles were seen in pulmonary endothelial cells and macropbages. HPS is a newly recognized, often fatal disease, with a spectrum of microscopic morphological changes, which may be an important cause of severe and fatal illness presenting as adult respiratory distress syndrome. ImagesFigure 1Figure 2Figure 3Figure 4Figure 5Figure 6Figure 7Figure 8Figure 9Figure 10Figure 11Figure 12Figure 13Figure 14Figure 15 PMID:7887439

Zaki, Sherif R.; Greer, Patricia w.; Coffield, Lisa M.; Goldsmith, Cynthia S.; Nolte, Kurt B.; Foucar, Kathy; Feddersen, Richard M.; Zumwalt, Ross E.; Miller, Gayle L.; Khan, Ali S.; Rollin, Pierre E.; Ksiazek, Thomas G.; Nichol, Stuart T.; Mahy, Brian W.J.; Peters, Clarence J.

1995-01-01

272

Clinicopathological analysis of pulmonary mucoepidermoid carcinoma  

PubMed Central

Background Mucoepidermoid carcinoma (MEC) of the lung is a rare malignant neoplasm. We aimed to investigate clinicopathological features, therapies, and prognoses of eight MEC cases. Methods Eight patients underwent surgical treatment for pulmonary MEC between 2005 and 2012 at the Thoracic Surgical Department of West China Hospital, Sichuan, China. The clinical data, radiological manifestation, treatment strategy, pathological findings, and prognoses of all patients were analyzed retrospectively. Results Among the eight cases (four males and four females), the age of patients ranged from 35 to 71 years (mean age 50.67 years). Two tumors were located in the upper lobes and three masses were located in the lower lobes. The other three lumps were located in the left main bronchus, middle segmental bronchus of the right lobe, and trachea, respectively. The characteristics of the tumors were consistent with low grade MEC (n?=?6) and high grade MEC (n?=?2). All of the patients were sent for oncological evaluations, and three patients with N1 or N2 disease received chemotherapy. One of the patients died from brain metastasis at 15 months. Seven of the eight patients were alive at the time of evaluation. The median survival time was 40 (range 8 to 88) months. Conclusion Mucoepidermoid tumors have to be treated by radical surgery with lymph node sampling and dissection. Patients with low grade tumors can be expected to be cured following complete resection. Careful histological typing plays a key role in prediction of late results, and further studies are needed. PMID:24507476

2014-01-01

273

Endocervicosis involving axillary lymph nodes: first case report.  

PubMed

The occurence of Mullerian epithelial inclusions, especially endosalpingiosis, in pelvic and other subdiaphragmatic lymph nodes is well known. In contrast, Mullerian inclusions involving lymph nodes above the diaphragm is uncommon, although occasional cases of endosalpingiosis have been reported. We report a case of benign Mullerian inclusions of mucinous endocervical type (endocervicosis) coexistent with metastatic breast-infiltrating ductal carcinoma in 2 axillary lymph nodes. The inclusions exhibited diffuse positive staining with CK7, PAX8, CA125, and estrogen receptor and were WT1 negative. To our knowledge, this is the first report of endocervicosis involving supradiaphragmatic lymph nodes. Close morphologic examination and immunohistochemistry assists in distinguishing Mullerian inclusions from metastatic adenocarcinoma. PMID:25272302

Mukonoweshuro, Pinias; McCluggage, W Glenn

2014-11-01

274

Nanoparticle Transport from Mouse Vagina to Adjacent Lymph Nodes  

PubMed Central

To test the feasibility of localized intravaginal therapy directed to neighboring lymph nodes, the transport of quantum dots across the vaginal wall was investigated. Quantum dots instilled into the mouse vagina were transported across the vaginal mucosa into draining lymph nodes, but not into distant nodes. Most of the particles were transported to the lumbar nodes; far fewer were transported to the inguinal nodes. A low level of transport was evident at 4 hr after intravaginal instillation, and transport peaked at about 36 hr after instillation. Transport was greatly enhanced by prior vaginal instillation of Nonoxynol-9. Hundreds of micrograms of nanoparticles/kg tissue (ppb) were found in the lumbar lymph nodes at 36 hr post-instillation. Our results imply that targeted transport of microbicides or immunogens from the vagina to local lymph organs is feasible. They also offer an in vivo model for assessing the toxicity of compounds intended for intravaginal use. PMID:23284844

Ballou, Byron; Andreko, Susan K.; Osuna-Highley, Elvira; McRaven, Michael; Catalone, Tina; Bruchez, Marcel P.; Hope, Thomas J.; Labib, Mohamed E.

2012-01-01

275

A gangliocytic patially glandular paraganglioma with lymph node metastasis  

PubMed Central

Gangliocytic paraganglioma (GP) is an infrequent neuroendocrine tumor usually with three elements as epithelioid cells, spindle-shaped cells and ganglion-like cells, which is generally regarded as a benign tumor. Only a few cases with lymph node metastasis have been reported. Herein, we reported a 47-year-old man of GP with distinct glandular component embedded in the spindle tumor cells in the primary tumor and the metastatic lymph nodes. The immunohistochemical profile was helpful to give the final diagnosis as gangliocytic paraganglioma. Here, we added one more GP case with regional lymph nodes metastasis. And particularly, there were small amount of distinct glandular component both in the primary tumor and the metastatic lymph nodes, which indicated that adenocarcinoma might coexist with GP. And GP should also be distinguished from carcinoid tumor, paraganglioma, ganglioneuroma, or GIST. PMID:24649939

2014-01-01

276

The endolymphatic perfusion of lymph nodes with toxic materials.  

PubMed Central

Individual lymph nodes of sheep were perfused, via a cannula in one of their afferent lymphatics, with a variety of toxic materials. This procedure was designed to ablate the parenchyma of the nodes so that the macrophage-rich afferent lymph would pass unaltered into the efferent duct, which also had been cannulated. Although many materials caused transient inflammation and/or immunoblastic responses, few caused lasting alterations in the cellular composition of the efferent lymph. Only melphalan, an alkylating agent, succeeded in damaging the internal structure of the nodes so that true afferent lymph appeared in the efferent duct and abundant dendritic macrophages could be collected. In the doses necessary to achieve this enough of the melphalan became systematized to produce a transient alopecia. PMID:2765388

Hall, J. G.; Sinnett, H. D.

1989-01-01

277

Outcome after reconstruction of discontinuous pulmonary arteries  

Microsoft Academic Search

Objective: This study was undertaken to determine outcomes of and optimal treatment strategies for reconstruction of congenital or acquired discontinuity of branch pulmonary arteries. Methods: Between 1985 and 2000 pulmonary artery continuity was established in 102 patients with discontinuous central pulmonary arteries and normal peripheral arborization. Data were obtained retrospectively. Results: Techniques to connect both pulmonary arteries included direct pulmonary

Christof Stamm; Ingeborg Friehs; David Zurakowski; Albertus M. Scheule; Adrian M. Moran; James E. Lock; John E. Mayer; Pedro J. del Nido; Richard A. Jonas

2002-01-01

278

Intraoperative Evaluation of Sentinel Lymph Nodes for Metastatic Breast Carcinoma by Imprint Cytology  

Microsoft Academic Search

Background: The increasing utilization of lymphatic mapping techniques for breast carcinoma has made intraoperative evaluation of sentinel lymph nodes attractive. Axillary lymph node dissection can be performed during the initial surgery if the sentinel lymph node is positive, potentially avoiding a second operative procedure. At present the optimal technique for rapid sentinel lymph node assessment has not been determined. Both

Andrew J. Creager; Kim R. Geisinger; Stephen A. Shiver; Nancy D. Perrier; Perry Shen; Jo Ann Shaw; Peter R. Young; Edward A. Levine

2002-01-01

279

Bicuspid pulmonary valve with atrial septal defect leading to pulmonary aneurysm  

Microsoft Academic Search

Pulmonary artery aneurysms are rare. We describe two adult cases with pulmonary artery aneurysm with normal pulmonary pressure associated with bicuspid pulmonary valve and atrial septal defect (ASD). One case presented with moderate pulmonary valve stenosis and was treated with open surgery; the other patient had a small ASD and mild pulmonary valve insufficiency and is still periodically evaluated. Hemodynamic

Motohiko Goda; Werner Budts; Els Troost; Bart Meyns

280

Reproducibility of pulmonary function tests under laboratory and field conditions  

Microsoft Academic Search

The reproducibility of pulmonary function tests in the laboratory and in a mobile field survey vehicle has been studied. Groups of laboratory workers were studied at base and a random sample of 38 coalminers was examined in the mobile laboratory. The intra-subject variability of some newer tests of lung function, including closing volume and maximum flow at low lung volumes,

R G Love; M D Attfield; K D Isles

1980-01-01

281

Recurrent ovarian cancer presenting in the right supraclavicular lymph node with isolated metastasis: a case report  

PubMed Central

Introduction The majority of ovarian cancer recurrences are in the abdomen. However, some cases relapse as isolated lymph node metastases, mostly in pelvic or para-aortic nodes. Peripheral isolated lymph node metastasis is rare. Case presentation A 69-year-old Japanese woman had recurrent ovarian cancer presenting with isolated right supraclavicular lymph node metastasis. After surgical resection and combination chemotherapy with carboplatin and paclitaxel, her right supraclavicular lymph node completely regressed. Conclusions Peripheral isolated lymph nodes, including right supraclavicular lymph node, can recur without a macroscopic abdominal lesion. Clinicians should carefully examine peripheral lymph nodes for recurrence. PMID:22747642

2012-01-01

282

Pulmonary ablation: a primer.  

PubMed

Percutaneous image-guided thermal ablation is safe and efficacious in achieving local control and improving outcome in the treatment of both early stage non-small-cell lung cancer and pulmonary metastatic disease, in which surgical treatment is precluded by comorbidity, poor cardiorespiratory reserve, or unfavorable disease distribution. Radiofrequency ablation is the most established technology, but new thermal ablation technologies such as microwave ablation and cryoablation may offer some advantages. The use of advanced techniques, such as induced pneumothorax and the popsicle stick technique, or combining thermal ablation with radiotherapy, widens the treatment options available to the multidisciplinary team. The intent of this article is to provide the reader with a practical knowledge base of pulmonary ablation by concentrating on indications, techniques, and follow-up. PMID:23942193

Roberton, Benjamin J; Liu, David; Power, Mark; Wan, John M C; Stuart, Sam; Klass, Darren; Yee, John

2014-05-01

283

Infant Pulmonary Function Testing  

PubMed Central

Infant pulmonary function testing has evolved from a research technique into a diagnostic tool. As such, new current procedural terminology (CPT) codes have been created and are available for use as of January 1, 2010. The technology now available has a range of applications. Through a series of vignettes, this article illustrates the methodology of the tests, some of their applications, and how to code and bill for the procedures. PMID:21540218

Davis, Stephanie D.

2011-01-01

284

Nanoparticles for Pulmonary Delivery  

Microsoft Academic Search

\\u000a This chapter aims to provide a rational for the use of nanoparticles in pulmonary delivery as well as an overview of strategies\\u000a and physiological implications of nanoparticle delivery to the lungs. Formulation aspects of nanoparticle systems in the form\\u000a of liquid dispersions and inhaled dry powders are also reviewed. The chapter also addresses the expanse of lung toxicology\\u000a research surrounding

Alan B. Watts; Robert O. Williams

285

Modeling RBC and Neutrophil Distribution Through an Anatomically Based Pulmonary Capillary Network  

Microsoft Academic Search

An anatomically based finite element model of the human pulmonary microcirculation has been created and applied to simulating regional variations in blood flow. A geometric mesh of the capillary network over the surface of a single alveolar sac is created using a Voronoi meshing technique. A pressure-flow relationship that describes blood cell transit is implemented in the network. Regional flow

Kelly S. Burrowes; Merryn H. Tawhai; Peter J. Hunter

2004-01-01

286

[Pulmonary circulatory disturbance on magnified peripheral pulmonary wedge angiography in chronic pulmonary emphysema].  

PubMed

Magnified peripheral pulmonary wedge angiography was performed in chronic pulmonary diseases. We classified the wedge angiography into five types based on the changes of capillary background (CBG) findings. Type I (normal), Type II (CBG is scattered and pulmonary arterial branches are tortuous), Type IIIa (CBG is decreased and pulmonary arterial branches are normal), Type IIIb (CBG and pulmonary arterial branches are also decreased or disappeared), Type IV (totally convergent). Using this classification, wedge angiography was performed in 42 patients out of 66 patients with chronic pulmonary emphysema diagnosed by selective alveolo-bronchography (SAB). Each type was compared in terms of hemodynamic data, blood gases and pulmonary function. Pulmonary emphysema was classified into types II, IIIa, and IIIb. There was no relation between SAB findings and wedge angiography classification. Severe hemodynamic data cases were found in types II and IIIb. The PaO2 of type II and IIIb were significantly lower than that of type IIIa. In pulmonary function tests, the mixed impairment type of ventilation was more frequently seen in type IIIb than IIIa. There was no relationship between SAB findings (66 cases) and hemodynamic data. These results suggest that classifying wedge angiography into five types (I, II, IIIa, IIIb, IV) may be useful for evaluating severity and determining prognosis and therapeutic measures in chronic pulmonary emphysema. PMID:2615105

Migita, R

1989-08-01

287

An Earth-Based Model of Microgravity Pulmonary Physiology  

NASA Technical Reports Server (NTRS)

There are currently only two practical methods of achieving micro G for experimentation: parabolic flight in an aircraft or space flight, both of which have limitations. As a result, there are many important aspects of pulmonary physiology that have not been investigated in micro G. We propose to develop an earth-based animal model of micro G by using liquid ventilation, which will allow us to fill the lungs with perfluorocarbon, and submersing the animal in water such that the density of the lungs is the same as the surrounding environment. By so doing, we will eliminate the effects of gravity on respiration. We will first validate the model by comparing measures of pulmonary physiology, including cardiac output, central venous pressures, lung volumes, and pulmonary mechanics, to previous space flight and parabolic flight measurements. After validating the model, we will investigate the impact of micro G on aspects of lung physiology that have not been previously measured. These will include pulmonary blood flow distribution, ventilation distribution, pulmonary capillary wedge pressure, ventilation-perfusion matching, and pleural pressures and flows. We expect that this earth-based model of micro G will enhance our knowledge and understanding of lung physiology in space which will increase in importance as space flights increase in time and distance.

Hirschl, Ronald B.; Bull, Joseph L.; Grothberg, James B.

2004-01-01

288

Pulmonary fungal infections.  

PubMed

This review details some of the advances that have been made in the recent decade in the diagnosis, treatment and epidemiology of pulmonary fungal infections. These advances have occurred because of increasing knowledge regarding the fungal genome, better understanding of the structures of the fungal cell wall and cell membrane and the use of molecular epidemiological techniques. The clinical implications of these advances are more rapid diagnosis and more effective and less toxic antifungal agents. For example, the diagnosis of invasive pulmonary aspergillosis, as well as histoplasmosis and blastomycosis, has improved with the use of easily performed antigen detection systems in serum and bronchoalveolar lavage fluid. Treatment of angioinvasive moulds has improved with the introduction of the new azoles, voriconazole and posaconazole that have broad antifungal activity. Amphotericin B is less frequently used, and when used is often given as lipid formulation to decrease toxicity. The newest agents, the echinocandins, are especially safe as they interfere with the metabolism of the fungal cell wall, a structure not shared with humans cells. Epidemiological advances include the description of the emergence of Cryptococcus gattii in North America and the increase in pulmonary mucormycosis and pneumonia due to Fusarium and Scedosporium species in transplant recipients and patients with haematological malignancies. The emergence of azole resistance among Aspergillus species is especially worrisome and is likely related to increased azole use for treatment of patients, but also to agricultural use of azoles as fungicides in certain countries. PMID:22335254

Smith, Jeannina A; Kauffman, Carol A

2012-08-01

289

Diagnosing pulmonary embolism  

PubMed Central

Objective testing for pulmonary embolism is necessary, because clinical assessment alone is unreliable and the consequences of misdiagnosis are serious. No single test has ideal properties (100% sensitivity and specificity, no risk, low cost). Pulmonary angiography is regarded as the final arbiter but is ill suited for diagnosing a disease present in only a third of patients in whom it is suspected. Some tests are good for confirmation and some for exclusion of embolism; others are able to do both but are often non-diagnostic. For optimal efficiency, choice of the initial test should be guided by clinical assessment of the likelihood of embolism and by patient characteristics that may influence test accuracy. Standardised clinical estimates can be used to give a pre-test probability to assess, after appropriate objective testing, the post-test probability of embolism. Multidetector computed tomography can replace both scintigraphy and angiography for the exclusion and diagnosis of this disease and should now be considered the central imaging investigation in suspected pulmonary embolism. PMID:15192162

Riedel, M

2004-01-01

290

Postoperative pulmonary infections  

PubMed Central

Introduction Postoperative pulmonary infections are associated with cough, phlegm, shortness of breath, chest pain, temperature above 38°C, and pulse rate above 100 a minute. Up to half of people may have asymptomatic chest signs after surgery, and up to a quarter develop symptomatic disease. The main risk factor is the type of surgery, with higher risks associated with surgery to the chest, abdomen, and head and neck compared with other operations. Other risk factors include age over 50 years, chronic obstructive pulmonary disease (COPD), smoking, hypoalbuminaemia, and being functionally dependent. Methods and outcomes We conducted a systematic review and aimed to answer the following clinical question: What are the effects of interventions to prevent postoperative pulmonary infections? We searched: Medline, Embase, The Cochrane Library, and other important databases up to May 2007 (Clinical Evidence reviews are updated periodically; please check our website for the most up-to-date version of this review). We included harms alerts from relevant organisations such as the US Food and Drug Administration (FDA) and the UK Medicines and Healthcare products Regulatory Agency (MHRA). Results We found 17 systematic reviews, RCTs, or observational studies that met our inclusion criteria. We performed a GRADE evaluation of the quality of evidence for interventions. Conclusions In this systematic review we present information relating to the effectiveness and safety of the following interventions: advice to stop smoking preoperatively, anaesthesia, lung expansion techniques, and postoperative nasogastric decompression. PMID:19445796

2008-01-01

291

Nontuberculous mycobacterial pulmonary infections  

PubMed Central

Pulmonary infections due to nontuberculous mycobacteria (NTM) are increasingly recognized worldwide. Although over 150 different species of NTM have been described, pulmonary infections are most commonly due to Mycobacterium avium complex (MAC), Mycobacterium kansasii, and Mycobacterium abscessus. The identification of these organisms in pulmonary specimens does not always equate with active infection; supportive radiographic and clinical findings are needed to establish the diagnosis. It is difficult to eradicate NTM infections. A prolonged course of therapy with a combination of drugs is required. Unfortunately, recurrent infection with new strains of mycobacteria or a relapse of infection caused by the original organism is not uncommon. Surgical resection is appropriate in selected cases of localized disease or in cases in which the infecting organism is resistant to medical therapy. Additionally, surgery may be required for infections complicated by hemoptysis or abscess formation. This review will summarize the practical aspects of the diagnosis and management of NTM thoracic infections, with emphasis on the indications for surgery and the results of surgical intervention. The management of NTM disease in patients with human immunodeficiency virus (HIV) infections is beyond the scope of this article and, unless otherwise noted, comments apply to hosts without HIV infection PMID:24624285

Odell, John A.

2014-01-01

292

Epidemiology of pulmonary arterial hypertension.  

PubMed

Changes in the epidemiology of pulmonary arterial hypertension (PAH) have resulted from changes in classification schemes and an increased emphasis on diagnosis because of the availability of effective therapies. The terms primary pulmonary hypertension and secondary pulmonary hypertension are considered inappropriate, confusing, and should not be used. Recent registries of patients with PAH have provided improved data regarding prognosis in the era of advanced therapies. PMID:24267294

Taichman, Darren B; Mandel, Jess

2013-12-01

293

Diagnosis of pulmonary arterial hypertension.  

PubMed

Accurate diagnosis of pulmonary arterial hypertension can be challenging and often requires a high index of clinical suspicion. Use of a variety of noninvasive tests can help define the population of patients in whom invasive cardiac catheterization should be pursued. An understanding of the historical, physical exam, electrocardiographic, radiographic, and echocardiographic clues in the diagnosis is important. A ventilation-perfusion scan and careful assessment for left-to-right shunting are mandatory to avoid missing reasons for pulmonary hypertension that may require nonpharmacologic management. Right heart, and sometimes concomitant left heart, catheterization is required to establish the diagnosis and distinguish pulmonary arterial from pulmonary venous hypertension. PMID:24267297

Forfia, Paul R; Trow, Terence K

2013-12-01

294

rhVEGF treatment preserves pulmonary vascular reactivity and structure in an experimental model of pulmonary hypertension in fetal sheep.  

PubMed

We have previously shown that lung VEGF expression is decreased in a fetal lamb model of PPHN and that VEGF165 inhibition causes severe pulmonary hypertension in fetal lambs. Therefore, we hypothesized that treatment with rhVEGF165 would preserve endothelium-dependent vasodilation and reduce the severity of pulmonary vascular remodeling in an experimental model of PPHN. We studied the effects of daily intrapulmonary infusions of rhVEGF after partial ligation of the ductus arteriosus (DA). We performed surgery in 24 late-gestation fetal lambs and placed catheters in the main pulmonary artery, left atrium, and aorta for pressure measurements and in the left pulmonary artery for drug infusions. A pressure transducer was placed around the LPA to measure blood flow to the left lung (Qp), and the DA was surgically constricted to induce pulmonary hypertension. rhVEGF165 or vehicle was infused for 7 or 14 days. ACh or 8-BrcGMP was infused on days 2 and 13 to assess endothelium-dependent and -independent vasodilation, respectively. ACh-induced vasodilation was reduced in PPHN lambs after 14 days (change in Qp from baseline, 106% vs. 11%). In contrast, the response to ACh was preserved in lambs treated with rhVEGF (change in Qp, 94% vs. 90%). Pulmonary vasodilation to 8-BrcGMP was not altered in PPHN lambs or enhanced by VEGF treatment. rhVEGF treatment increased expression of lung eNOS protein and decreased pulmonary artery wall thickness by 34% vs. PPHN lambs. We conclude that VEGF165 preserves endothelium-dependent vasodilation, upregulates eNOS expression, and reduces the severity of pulmonary vascular remodeling in experimental PPHN. PMID:15833763

Grover, Theresa R; Parker, Thomas A; Markham, Neil E; Abman, Steven H

2005-08-01

295

Intraoperative Subareolar Radioisotope Injection for Immediate Sentinel Lymph Node Biopsy  

PubMed Central

Objective: To determine the identification of sentinel lymph node biopsy (SLNB) in breast cancer patients after intraoperative injection of unfiltered technetium-99m sulfur colloid (Tc-99) and blue dye. Background: SLNB guided by a combination of radioisotope and blue dye injection yields the best identification rates in breast cancer patients. Radioisotope is given preoperatively, without local anesthesia, whereas blue dye is given intraoperatively. We hypothesized that, because of the rapid drainage noted with the subareolar injection technique of radioisotope, intraoperative injection would be feasible and less painful for SLN localization in breast cancer patients. Methods: Intraoperative injection of Tc-99 and confirmation blue dye was performed using the subareolar technique for SLNB in patients with operable breast cancer. The time lapse between injection and axillary incision, the background count, the preincision and ex vivo counts of the hot nodes, and the axillary bed counts were documented. The identification rate was recorded. Results: Ninety-six SLNB procedures were done in 88 patients with breast cancer employing intraoperative subareolar injection technique for both radioisotope (all 96 procedures) and blue dye (93 procedures) injections. Ninety-three (97%) procedures had successful identification; all SLNs were hot; 91 (of 93 procedures with blue dye) were blue and hot. The mean time from radioisotope injection to incision was 19.9 minutes (SD 8.5 minutes). The mean highest 10 second count was 88,544 (SD 55,954). Three of 96 (3%) patients with failure of localization had previous excisional biopsies: 1 circumareolar and 2 upper outer quadrant incisions that may have disrupted the lymphatic flow. Conclusion: Intraoperative subareolar injection of radioisotope rapidly drains to the SLNs and allows immediate staging of the axilla, avoiding the need to coordinate diagnostic services and a painful preoperative procedure. PMID:15166963

Layeeque, Rakhshanda; Kepple, Julie; Henry-Tillman, Ronda S.; Adkins, Laura; Kass, Rena; Colvert, Maureen; Gibson, Regina; Mancino, Anne; Korourian, Soheila; Klimberg, V Suzanne

2004-01-01

296

Pattern of lymph node involvement and prognosis in pancreatic adenocarcinoma: direct lymph node invasion has similar survival to node-negative disease.  

PubMed

Lymph node status is one of the most important predictors of survival in pancreatic ductal adenocarcinoma. Surgically resected pancreatic adenocarcinoma is often locally invasive and may invade directly into peripancreatic lymph nodes. The significance of direct invasion into lymph nodes in the absence of true lymphatic metastases is unclear. The purpose of this study was to retrospectively compare clinical outcome in patients with pancreatic ductal adenocarcinoma with direct invasion into peripancreatic lymph nodes with patients with node-negative adenocarcinomas and patients with true lymphatic lymph node metastasis. A total of 380 patients with invasive pancreatic ductal adenocarcinoma classified as pT3, were evaluated: ductal adenocarcinoma with true lymphatic metastasis to regional lymph nodes (248 cases), ductal adenocarcinoma without lymph node involvement (97 cases), and ductal adenocarcinoma with regional lymph nodes involved only by direct invasion from the main tumor mass (35 cases). Isolated lymph node involvement by direct invasion occurred in 35 of 380 (9%) patients. Overall survival for patients with direct invasion of lymph nodes (median survival, 21 mo; 5-year overall survival, 36%) was not statistically different from patients with node-negative adenocarcinomas (median survival, 30 mo; 5-year overall survival, 31%) (P=0.609). Patients with node-negative adenocarcinomas had an improved survival compared with patients with lymph node involvement by true lymphatic metastasis (median survival, 15 mo; 5-year overall survival, 8%) (P<0.001) regardless of the number of lymph nodes involved by adenocarcinoma. There was a trend toward decreased overall survival for patients with 1 or 2 lymph nodes involved by true lymphatic metastasis compared with patients with direct invasion of tumor into lymph nodes (P=0.056). However, this did not reach statistical significance. Our results indicate that patients with isolated direct lymph node invasion have a comparable overall survival with patients with node-negative adenocarcinomas as opposed to true lymphatic lymph node metastasis. PMID:21263243

Pai, Rish K; Beck, Andrew H; Mitchem, Jonathan; Linehan, David C; Chang, Daniel T; Norton, Jeffrey A; Pai, Reetesh K

2011-02-01

297

Investigation of the dermal sensitizing potential of traditional medical extracts in local lymph node assays.  

PubMed

Traditional medical extracts are commonly used as complex mixtures, which may contain naturally occurring contact sensitizers. In this investigation, the mice local lymph node assay (LLNA) was performed to evaluate the dermal sensitization potential of Myrrh, Borneolum, Olibanum, Moschus and Cassia Bark, which are widely used in topical traditional medication. In the radioactive LLNA, the stimulation index (SI) values were calculated for each medical extract. Myrrh, Borneolum, Olibanum and Moschus induced dose-dependent cell proliferation and SI was more than 3. Cassia Bark showed no positive response over the range of test concentrations. In the flow cytometry analysis, the total number of CD3(+), CD4(+), and CD8(+) cells in local lymph nodes was increased in Moschus-, Olibanum-, Myrrh- and Borneolum-treated mice. The ratio of the B220(+)/CD3(+) (B/T cell ratio) and the percentage of I-A(k+) cells that was also positive for the CD69 marker (I-A(k+)/ CD69(+)) were increased in the Moschus-, Olibanum- and Myrrh-treated mice. However, no ofbvious change was observed in Borneolum-treated mice. Cassia Bark did not induce changes in the lymphocyte subpopulations. These results indicate that Moschus, Olibanum and Myrrh can be regarded as sensitizers, and Borneolum regarded as an irritant. Cassia Bark is neither a sensitizer nor an irritant. The combination of radioactive and flow cytometric LLNA can be used for the prediction of sensitizing potential of medical extracts which lead to allergic contact dermatitis in humans. PMID:19144870

Lv, Lei; Yan, Guang-Yan; Zhao, Ying-Lan; He, Xiao-Juan; Jiang, Xing; Zhuo, Yan-Qiang; Wang, Yan-Li; Wang, Li; Cen, Xiao-Bo

2009-03-01

298

Hypertrophic pulmonary osteoarthropathy in pulmonary metastasis--a case report.  

PubMed

Hypertrophic pulmonary Osteoarthropathy is most commonly encountered in association with bronchogenic carcinoma and tumours of the pleura. Its association with pulmonary metastasis from extrathoracic neoplasms is rare. We report a 33 years old male Ethiopian who presented with Cannon ball lesions, clubbing of the digits, periostitis, gynaecomastia, acromegalic features and bilateral knee arthritis. Related literature is briefly reviewed. PMID:9164041

Aderaye, G

1996-10-01

299

"Denervation" of autonomous nervous system in idiopathic pulmonary arterial hypertension by low-dose radiation: a case report with an unexpected outcome  

PubMed Central

Vasointestinal peptide metabolism plays a key physiological role in multimodular levels of vasodilatory, smooth muscle cell proliferative, parenchymal, and inflammatory lung reactions. In animal studies, vasointestinal peptide relaxes isolated pulmonary arterial segments from several mammalian species in vitro and neutralizes the pulmonary vasoconstrictor effect of endothelin. In some animal models, it reduces pulmonary vascular resistance in vivo and in monocrotaline-induced pulmonary hypertension. A 58-year-old woman presented with dyspnea and mild edema of the lower extremities. A bronchoscopy was performed without any suspicious findings suggesting a central tumor or other infiltrative disease. Endobronchial ultrasound revealed enlarged pulmonary arteries containing thrombi, a few enlarged lymph nodes, and enlarged mediastinal tissue anatomy with suspicion for mediastinal infiltration of a malignant process. We estimated that less than 10% of the peripheral vascular bed of the lung was involved in direct consolidated fibrosis as demonstrated in the left upper lobe apex. Further, direct involvement of fibrosis around the main stems of the pulmonary arteries was assumed to be low from positron emission tomography and magnetic resonance imaging scans. Assuming a positive influence of low-dose radiation, it was not expected that this could have reduced pulmonary vascular resistance by over two thirds of the initial result. However; it was noted that this patient had idiopathic pulmonary arterial hypertension mixed with “acute” (mediastinal) fibrosis which could have contributed to the unexpected success of reduction of pulmonary vascular resistance. To the best of our knowledge, this is the first report of successful treatment of idiopathic pulmonary arterial hypertension, probably as a result of low-dose radiation to the pulmonary arterial main stems. The patient continues to have no specific complaints concerning her idiopathic pulmonary arterial hypertension. PMID:24707181

Hohenforst-Schmidt, Wolfgang; Zarogoulidis, Paul; Oezkan, Filiz; Mahnkopf, Christian; Grabenbauer, Gerhard; Kreczy, Alfons; Bartunek, Rudolf; Darwiche, Kaid; Freitag, Lutz; Li, Qiang; Huang, Haidong; Vogl, Thomas; LePilvert, Patrick; Tsiouda, Theodora; Tsakiridis, Kosmas; Zarogoulidis, Konstantinos; Brachmann, Johannes

2014-01-01

300

"Denervation" of autonomous nervous system in idiopathic pulmonary arterial hypertension by low-dose radiation: a case report with an unexpected outcome.  

PubMed

Vasointestinal peptide metabolism plays a key physiological role in multimodular levels of vasodilatory, smooth muscle cell proliferative, parenchymal, and inflammatory lung reactions. In animal studies, vasointestinal peptide relaxes isolated pulmonary arterial segments from several mammalian species in vitro and neutralizes the pulmonary vasoconstrictor effect of endothelin. In some animal models, it reduces pulmonary vascular resistance in vivo and in monocrotaline-induced pulmonary hypertension. A 58-year-old woman presented with dyspnea and mild edema of the lower extremities. A bronchoscopy was performed without any suspicious findings suggesting a central tumor or other infiltrative disease. Endobronchial ultrasound revealed enlarged pulmonary arteries containing thrombi, a few enlarged lymph nodes, and enlarged mediastinal tissue anatomy with suspicion for mediastinal infiltration of a malignant process. We estimated that less than 10% of the peripheral vascular bed of the lung was involved in direct consolidated fibrosis as demonstrated in the left upper lobe apex. Further, direct involvement of fibrosis around the main stems of the pulmonary arteries was assumed to be low from positron emission tomography and magnetic resonance imaging scans. Assuming a positive influence of low-dose radiation, it was not expected that this could have reduced pulmonary vascular resistance by over two thirds of the initial result. However; it was noted that this patient had idiopathic pulmonary arterial hypertension mixed with "acute" (mediastinal) fibrosis which could have contributed to the unexpected success of reduction of pulmonary vascular resistance. To the best of our knowledge, this is the first report of successful treatment of idiopathic pulmonary arterial hypertension, probably as a result of low-dose radiation to the pulmonary arterial main stems. The patient continues to have no specific complaints concerning her idiopathic pulmonary arterial hypertension. PMID:24707181

Hohenforst-Schmidt, Wolfgang; Zarogoulidis, Paul; Oezkan, Filiz; Mahnkopf, Christian; Grabenbauer, Gerhard; Kreczy, Alfons; Bartunek, Rudolf; Darwiche, Kaid; Freitag, Lutz; Li, Qiang; Huang, Haidong; Vogl, Thomas; Lepilvert, Patrick; Tsiouda, Theodora; Tsakiridis, Kosmas; Zarogoulidis, Konstantinos; Brachmann, Johannes

2014-01-01

301

Normal and abnormal pulmonary arteriovenous shunting: occurrence and mechanisms.  

PubMed

Severe cyanosis due to pulmonary arteriovenous fistulas occurs often after a bidirectional superior cavopulmonary anastomosis (Glenn operation) and also in some congenital anomalies in which hepatic venous blood bypasses the lungs in the first passage. Relocation of hepatic flow into the lungs usually causes these fistulas to disappear. Similar pulmonary arteriovenous fistulas are observed in hereditary haemorrhagic telangiectasia, and in liver disease (hepatopulmonary syndrome). There is no convincing identification yet of a responsible hepatic factor that produces these lesions. Candidates for such a factor are reviewed, and the possibility of angiotensin or bradykinin contributing to the fistulas is discussed. PMID:23458130

Hoffman, Julien I E

2013-10-01

302

Chronic obstructive pulmonary disease  

PubMed Central

The global prevalence of physiologically defined chronic obstructive pulmonary disease (COPD) in adults aged >40 yr is approximately 9-10 per cent. Recently, the Indian Study on Epidemiology of Asthma, Respiratory Symptoms and Chronic Bronchitis in Adults had shown that the overall prevalence of chronic bronchitis in adults >35 yr is 3.49 per cent. The development of COPD is multifactorial and the risk factors of COPD include genetic and environmental factors. Pathological changes in COPD are observed in central airways, small airways and alveolar space. The proposed pathogenesis of COPD includes proteinase-antiproteinase hypothesis, immunological mechanisms, oxidant-antioxidant balance, systemic inflammation, apoptosis and ineffective repair. Airflow limitation in COPD is defined as a postbronchodilator FEV1 (forced expiratory volume in 1 sec) to FVC (forced vital capacity) ratio <0.70. COPD is characterized by an accelerated decline in FEV1. Co morbidities associated with COPD are cardiovascular disorders (coronary artery disease and chronic heart failure), hypertension, metabolic diseases (diabetes mellitus, metabolic syndrome and obesity), bone disease (osteoporosis and osteopenia), stroke, lung cancer, cachexia, skeletal muscle weakness, anaemia, depression and cognitive decline. The assessment of COPD is required to determine the severity of the disease, its impact on the health status and the risk of future events (e.g., exacerbations, hospital admissions or death) and this is essential to guide therapy. COPD is treated with inhaled bronchodilators, inhaled corticosteroids, oral theophylline and oral phosphodiesterase-4 inhibitor. Non pharmacological treatment of COPD includes smoking cessation, pulmonary rehabilitation and nutritional support. Lung volume reduction surgery and lung transplantation are advised in selected severe patients. Global strategy for the diagnosis, management and prevention of Chronic Obstructive Pulmonary Disease guidelines recommend influenza and pneumococcal vaccinations. PMID:23563369

Vijayan, V.K.

2013-01-01

303

Chronic obstructive pulmonary disease.  

PubMed

The global prevalence of physiologically defined chronic obstructive pulmonary disease (COPD) in adults aged >40 yr is approximately 9-10 per cent. Recently, the Indian Study on Epidemiology of Asthma, Respiratory Symptoms and Chronic Bronchitis in Adults had shown that the overall prevalence of chronic bronchitis in adults >35 yr is 3.49 per cent. The development of COPD is multifactorial and the risk factors of COPD include genetic and environmental factors. Pathological changes in COPD are observed in central airways, small airways and alveolar space. The proposed pathogenesis of COPD includes proteinase-antiproteinase hypothesis, immunological mechanisms, oxidant-antioxidant balance, systemic inflammation, apoptosis and ineffective repair. Airflow limitation in COPD is defined as a postbronchodilator FEV1 (forced expiratory volume in 1 sec) to FVC (forced vital capacity) ratio <0.70. COPD is characterized by an accelerated decline in FEV1. Co morbidities associated with COPD are cardiovascular disorders (coronary artery disease and chronic heart failure), hypertension, metabolic diseases (diabetes mellitus, metabolic syndrome and obesity), bone disease (osteoporosis and osteopenia), stroke, lung cancer, cachexia, skeletal muscle weakness, anaemia, depression and cognitive decline. The assessment of COPD is required to determine the severity of the disease, its impact on the health status and the risk of future events (e.g., exacerbations, hospital admissions or death) and this is essential to guide therapy. COPD is treated with inhaled bronchodilators, inhaled corticosteroids, oral theophylline and oral phosphodiesterase-4 inhibitor. Non pharmacological treatment of COPD includes smoking cessation, pulmonary rehabilitation and nutritional support. Lung volume reduction surgery and lung transplantation are advised in selected severe patients. Global strategy for the diagnosis, management and prevention of Chronic Obstructive Pulmonary Disease guidelines recommend influenza and pneumococcal vaccinations. PMID:23563369

Vijayan, V K

2013-02-01

304

An image analysis system for near-infrared (NIR) fluorescence lymph imaging  

NASA Astrophysics Data System (ADS)

Quantitative analysis of lymphatic function is crucial for understanding the lymphatic system and diagnosing the associated diseases. Recently, a near-infrared (NIR) fluorescence imaging system is developed for real-time imaging lymphatic propulsion by intradermal injection of microdose of a NIR fluorophore distal to the lymphatics of interest. However, the previous analysis software3, 4 is underdeveloped, requiring extensive time and effort to analyze a NIR image sequence. In this paper, we develop a number of image processing techniques to automate the data analysis workflow, including an object tracking algorithm to stabilize the subject and remove the motion artifacts, an image representation named flow map to characterize lymphatic flow more reliably, and an automatic algorithm to compute lymph velocity and frequency of propulsion. By integrating all these techniques to a system, the analysis workflow significantly reduces the amount of required user interaction and improves the reliability of the measurement.

Zhang, Jingdan; Zhou, Shaohua Kevin; Xiang, Xiaoyan; Rasmussen, John C.; Sevick-Muraca, Eva M.

2011-03-01

305

Incidental findings detection using low tube potential for CT pulmonary angiography.  

PubMed

While lowering the radiation dose using a reduced tube potential (kVp) strategy for CT pulmonary angiography (CTPA) maintains accuracy for pulmonary embolism detection, there is no data regarding the effect of increased noise from lower kVp on both the accuracy of lung and mediastinum lesion detection in the same patient cohort. This study compares the accuracy and diagnostic confidence of lung nodules and enlarged mediastinal lymph nodes detection between low and standard kVp CTPA. The study cohort included 272 CTPA studies acquired at low kVp and 274 studies at standard kVp. Each patient had a routine chest CT acquired within 60 days of the CTPA that served as a reference standard for lung and mediastinum lesions. In additional to the evaluation of image quality, two radiologists independently interpreted lung nodules and mediastinal lymph nodes on CTPA and recorded confidence level for each interpretation. Multivariate models assessed effect of kVp settings on diagnostic accuracy and confidence level in interpretation. Low kVp CTPAs had higher image noise. A significant decrease in the confidence levels for evaluation of mediastinal lymph nodes was observed at low kVp by one of two readers, although there was no significant correlation between accuracy of interpretation and kVp settings for lung and mediastinum lesion detection (adjusted odds ratios = 0.67-1.22, p values >0.2). While increased image noise may decrease the diagnostic confidence of the radiologist, the detection of lung nodules and enlarged mediastinal lymph nodes was not compromised. Referring clinicians can expect that lower radiation dose CTPA answers questions related to lungs and mediastinum. PMID:25082644

Kumamaru, Kanako K; Rybicki, Frank J; Madan, Rachna; Gill, Ritu; Wake, Nicole; Hunsaker, Andetta R

2014-12-01

306

Pulmonary extramedullary haematopoiesis  

PubMed Central

A 72-year-old Caucasian lady with myeloproliferative disorder was admitted for evaluation of progressive dyspnoea, weight loss, fatigue and mild hypoxia. A diffuse ground glass opacity was seen on CT pulmonary angiogram. Differential diagnoses included heart failure, infection, progression of myeloproliferative disorder with extramedullary haematopoiesis, thromboembolism or hydroxyurea-induced lung injury. Bronchoscopy and broncho-alveolar lavage were uninformative however lung biopsy with video-assisted thoracoscopy revealed extramedullary haematopoiesis within lung parenchyma. This is a very rare complication of myeloproliferative disorder and the authors discuss the significance of the case, review the literature and report the patient’s progress. PMID:22669524

Mubarak, Veenu; Fanning, Stephen; Windsor, Morgon; Duhig, Edwina; Bowler, Simon

2011-01-01

307

[Human pulmonary dirofilariasis].  

PubMed

The patient was a 60's-year-old man, who was incidentally pointed out a coin lesion in the right lung by chest radiogram. Chest computed tomography showed a round-shaped, well defined nodule of 2.5 cm in size in the right S1. Positron emission tomography did not show the accumulation of fluorodeoxyglucose in the nodule. We considered the tumor to be benign, but the patient chose surgical treatment. Partial resection of the lung was performed by thoracoscopic surgery. Histopathological diagnosis was human pulmonary dirofilariasis. PMID:22187872

Terasaka, Yukinori; Inaba, Hirohisa; Furuta, Shinpei; Shimojima, Reiko; Shintani, Tsunehiro; Miyabe, Rika; Kobayashi, Hideaki; Shiraishi, Kou; Nakayama, Takamori; Mori, Shunji; Isobe, Kiyoshi; Kasahara, Masao

2011-11-01

308

Cavitary Pulmonary Disease  

PubMed Central

Summary: A pulmonary cavity is a gas-filled area of the lung in the center of a nodule or area of consolidation and may be clinically observed by use of plain chest radiography or computed tomography. Cavities are present in a wide variety of infectious and noninfectious processes. This review discusses the differential diagnosis of pathological processes associated with lung cavities, focusing on infections associated with lung cavities. The goal is to provide the clinician and clinical microbiologist with an overview of the diseases most commonly associated with lung cavities, with attention to the epidemiology and clinical characteristics of the host. PMID:18400799

Gadkowski, L. Beth; Stout, Jason E.

2008-01-01

309

[Infectious pulmonary diseases].  

PubMed

Infectious pulmonary diseases and pneumonias are important causes of death within the group of infectious diseases in Germany. Most cases are triggered by bacteria. The morphology of the inflammation is often determined by the agent involved but several histopathological types of reaction are possible. Histology alone is only rarely able to identify the causal agent; therefore additional microbiological diagnostics are necessary in most cases. Clinically cases are classified as community acquired and nosocomial pneumonia, pneumonia under immunosuppression and mycobacterial infections. Histologically, alveolar and interstitial as well as lobar and focal pneumonia can be differentiated. PMID:25319227

Hager, T; Reis, H; Theegarten, D

2014-11-01

310

MyD88- and TRIF-independent induction of type I interferon drives naive B cell accumulation but not loss of lymph node architecture in Lyme disease.  

PubMed

Rapidly after infection, live Borrelia burgdorferi, the causative agent of Lyme disease, is found within lymph nodes, causing rapid and strong tissue enlargement, a loss of demarcation between B cell follicles and T cell zones, and an unusually large accumulation of B cells. We sought to explore the mechanisms underlying these changes, as lymph tissue disruption could be detrimental for the development of robust Borrelia-specific immunity. A time course study demonstrated that the loss of the normal lymph node structure was a distinct process that preceded the strong increases in B cells at the site. The selective increases in B cell frequencies were due not to proliferation but rather to cytokine-mediated repositioning of B cells to the lymph nodes, as shown with various gene-targeted and bone marrow irradiation chimeras. These studies demonstrated that B. burgdorferi infection induced type I interferon receptor (IFNR) signaling in lymph nodes in a MyD88- and TRIF-independent manner and that type I IFNR indirect signaling was required for the excessive increases of naive B cells at those sites. It did not, however, drive the observed histopathological changes, which occurred independently also from major shifts in the lymphocyte-homing chemokines, CXCL12, CXCL13, and CCL19/21, as shown by quantitative reverse transcription-PCR (qRT-PCR), flow cytometry, and transwell migration experiments. Thus, B. burgdorferi infection drives the production of type I IFN in lymph nodes and in so doing strongly alters the cellular composition of the lymph nodes, with potential detrimental effects for the development of robust Borrelia-specific immunity. PMID:24452685

Hastey, Christine J; Ochoa, Jennine; Olsen, Kimberley J; Barthold, Stephen W; Baumgarth, Nicole

2014-04-01

311

[Tracers used for the detection of sentinel lymph nodes].  

PubMed

The dye or isotope technique is generally used for sentinel lymph node mapping. There are many types of tracers available for the two techniques, and it is important to understand their characteristics such as particle size for appropriate use in specific diseases or conditions. There is an increasing tendency to use indocyanine green or indigo carmine dye instead of isosulfan or sulfan blue dye to avoid potentially life-threatening allergic reactions. Sentinel lymph nodes can easily be detected with the dye method 5-20 min after peritumoral tracer injection. When using dye mapping alone, sentinel lymph node detection should be achieved before the dye reaches nonsentinel nodes. Technetium-99m-labeled tin-colloid or phytate is frequently used in the isotope technique. Isotope injection the day before surgery can reduce the effects of the shine-through phenomenon. Lymphoscintigraphy often permits preoperative sentinel lymph node detection as a guide to intraoperative survey. In current practice, the combination of a radioisotope and blue dye for lymphatic mapping is thought to improve the sentinel lymph node identification rate. New techniques such as fluorescence imaging are being investigated. PMID:19348200

Nakahara, Tadaki

2009-03-01

312

Proteome changes in mesenteric lymph induced by sepsis.  

PubMed

The present study aimed to examine the changes in mesenteric lymph during the development of sepsis and to identify the distinct proteins involved, as targets for further study. The sepsis animal model was constructed by cecal ligation and puncture (CLP). The mesenteric lymph was collected from 28 adult male Sprague?Dawley rats, which were randomly divided into the following four groups (n=7 per group): CLP?6 h, CLP?24 h, sham?6 h and sham?24 h groups. Capillary high performance liquid chromatography?tandem mass spectrometry was performed to analyze the proteome in mesenteric lymph. A comprehensive bioinformatic analysis was then conducted to investigate the distinct proteins. Compared with the sham group, 158 distinct proteins were identified in the lymph samples from the CLP group. Five of these proteins associated with the same lipid metabolism pathway were selected, apolipoprotein E (ApoE), annexin A1 (Anxa1), neutrophil gelatinase?associated lipocalin (NGAL), S100a8 and S100a9. The expression of ApoE, Anxa1, NGAL, S100a8 and S100a9 were all elevated in the progression of sepsis. The five proteins were reported to be closely associated with disease development and may be a potential target for the diagnosis and treatment of sepsis. In conclusion, identifying proteome changes in mesenteric lymph provides a novel perspective to understand the pathological mechanisms underlying sepsis. PMID:25242054

Zhang, Ping; Li, Yan; Zhang, Lian-Dong; Wang, Liang-Hua; Wang, Xi; He, Chao; Lin, Zhao-Fen

2014-12-01

313

Sentinel Lymph Node Biopsy in Nonmelanoma Skin Cancer Patients  

PubMed Central

The management of lymph nodes in nonmelanoma skin cancer patients is currently still debated. Merkel cell carcinoma (MCC), squamous cell carcinoma (SCC), pigmented epithelioid melanocytoma (PEM), and other rare skin neoplasms have a well-known risk to spread to regional lymph nodes. The use of sentinel lymph node biopsy (SLNB) could be a promising procedure to assess this risk in clinically N0 patients. Metastatic SNs have been observed in 4.5–28% SCC (according to risk factors), in 9–42% MCC, and in 14–57% PEM. We observed overall 30.8% positive SNs in 13 consecutive patients operated for high-risk nonmelanoma skin cancer between 2002 and 2011 in our institution. These high rates support recommendation to implement SLNB for nonmelanoma skin cancer especially for SCC patients. Completion lymph node dissection following positive SNs is also a matter of discussion especially in PEM. It must be remembered that a definitive survival benefit of SLNB in melanoma patients has not been proven yet. However, because of its low morbidity when compared to empiric elective lymph node dissection or radiation therapy of lymphatic basins, SLNB has allowed sparing a lot of morbidity and could therefore be used in nonmelanoma skin cancer patients, even though a significant impact on survival has not been demonstrated. PMID:23476781

Matthey-Gie, Marie-Laure; Boubaker, Ariane; Letovanec, Igor; Demartines, Nicolas; Matter, Maurice

2013-01-01

314

Proteome changes in mesenteric lymph induced by sepsis  

PubMed Central

The present study aimed to examine the changes in mesenteric lymph during the development of sepsis and to identify the distinct proteins involved, as targets for further study. The sepsis animal model was constructed by cecal ligation and puncture (CLP). The mesenteric lymph was collected from 28 adult male Sprague-Dawley rats, which were randomly divided into the following four groups (n=7 per group): CLP-6 h, CLP-24 h, sham-6 h and sham-24 h groups. Capillary high performance liquid chromatography-tandem mass spectrometry was performed to analyze the proteome in mesenteric lymph. A comprehensive bioinformatic analysis was then conducted to investigate the distinct proteins. Compared with the sham group, 158 distinct proteins were identified in the lymph samples from the CLP group. Five of these proteins associated with the same lipid metabolism pathway were selected, apolipoprotein E (ApoE), annexin A1 (Anxa1), neutrophil gelatinase-associated lipocalin (NGAL), S100a8 and S100a9. The expression of ApoE, Anxa1, NGAL, S100a8 and S100a9 were all elevated in the progression of sepsis. The five proteins were reported to be closely associated with disease development and may be a potential target for the diagnosis and treatment of sepsis. In conclusion, identifying proteome changes in mesenteric lymph provides a novel perspective to understand the pathological mechanisms underlying sepsis. PMID:25242054

ZHANG, PING; LI, YAN; ZHANG, LIAN-DONG; WANG, LIANG-HUA; WANG, XI; HE, CHAO; LIN, ZHAO-FEN

2014-01-01

315

Abnormal lung gallium-67 uptake preceding pulmonary physiologic impairment in an asymptomatic patient with Pneumocystis carinii pneumonia  

SciTech Connect

Pneumocystis carinii pneumonia was suggested by a diffuse, bilateral pulmonary uptake of gallium-67 in an asymptomatic, homosexual male with the antibody to the immunodeficiency virus (HIV) who was undergoing staging evaluation for lymphoma clinically localized to a left inguinal lymph node. Chest radiograph and pulmonary function evaluation, including lung volumes, diffusing capacity and arterial blood gases, were within normal limits. Bronchoalveolar lavage revealed Pneumocystis carinii organisms. In this asymptomatic, HIV-positive patient, active alveolar infection, evidenced by abnormal gallium-67 scanning, predated pulmonary physiologic abnormalities. This observation raises questions concerning the natural history of this disease process and the specificity of physiologic tests for excluding disease. It also has implications for the treatment of neoplasia in the HIV-positive patient population.

Reiss, T.F.; Golden, J. (Univ. of California, San Francisco (USA))

1990-05-01

316

Acute Exercise Activates Pulmonary eNOS and Lowers Pulmonary Pressure in Rats with Pulmonary Arterial Hypertension  

E-print Network

Acute Exercise Activates Pulmonary eNOS and Lowers Pulmonary Pressure in Rats with Pulmonary is impaired in pulmonary arterial hypertension (PAH). Exercise may be beneficial in PAH, just as it is for systemic vascular disease, via upregulation of endothelial nitric oxide synthase (eNOS) expression

Zhou, Yaoqi

317

Thoracoscopy assisted pulmonary lobectomy.  

PubMed Central

BACKGROUND--This report describes a preliminary experience with six patients undergoing video imaged thoracoscopic pulmonary lobectomy. METHODS--Three left upper lobectomies, and one each of right upper, right lower and left lower lobectomy were undertaken. The resections were performed as orthodox dissectional lobectomy procedures but were carried out under videothoracoscopic imaging with instruments introduced through two stab incisions. The entire resected lobe was delivered through a 7 cm submammary intercostal incision. RESULTS--There were no operative deaths or complications attributable to the technique. In three other patients conversion to an open thoracotomy was required because of bleeding (two cases) or obscure anatomy (one case). Post-operative pain in those undergoing thoracoscopic resection was less than that encountered with standard thoracotomy and early clinic review showed the patients to be pain free with excellent shoulder movement. CONCLUSIONS--Major pulmonary resection according to standard cancer practices is feasible with videothoracoscopic techniques. This approach is likely to offer considerable functional benefit to patients. Specimen delivery through the submammary incision imposes a 5 cm primary lesion size limitation. Detailed mediastinal assessment is necessary to exclude N2 status before undertaking thoracoscopic surgery. PMID:8236075

Walker, W. S.; Carnochan, F. M.; Tin, M.

1993-01-01

318

[Percutaneous pulmonary valvuloplasty].  

PubMed

Five patients (aged between 11 and 59 years) with valvular pulmonary artery stenosis and pressure gradients between 60 and 143 mm Hg underwent percutaneous transluminal balloon valvuloplasty. Selection of the appropriate balloon size was based on the measurement of the dimension of the value anulus as a determinant from the angiogram. Balloon catheters were used with a diameter of 18 to 20 mm. After placement in the stenotic valve the balloon was filled with diluted contrast material for 10-20 s. The balloon indention by the stenotic valve disappeared suddenly during expansion with one to three atmospheres. The pressure gradient in individual patients decreased from 60 to 25, from 143 to 60, 100 to 55, 143 to 60, and 60 to 37 mm Hg, in the mean from 101 to 52 mm Hg. All patients were discharged two to four days after the procedure. During follow-up with recatheterization after three to nine months (four patients) the gradients decreased as compared to the value immediately after valvuloplasty. The exercise capacity increased in all patients. No complications were observed. Balloon valvuloplasty of pulmonary valvular stenosis seems to be an alternative to the operative procedure. PMID:2937221

Bussmann, W D; Sievert, H; Reifart, N; Kober, G; Satter, P; Kaltenbach, M

1985-12-01

319

Pulmonary macrophage transplantation therapy.  

PubMed

Bone-marrow transplantation is an effective cell therapy but requires myeloablation, which increases infection risk and mortality. Recent lineage-tracing studies documenting that resident macrophage populations self-maintain independently of haematological progenitors prompted us to consider organ-targeted, cell-specific therapy. Here, using granulocyte-macrophage colony-stimulating factor (GM-CSF) receptor-?-deficient (Csf2rb(-/-)) mice that develop a myeloid cell disorder identical to hereditary pulmonary alveolar proteinosis (hPAP) in children with CSF2RA or CSF2RB mutations, we show that pulmonary macrophage transplantation (PMT) of either wild-type or Csf2rb-gene-corrected macrophages without myeloablation was safe and well-tolerated and that one administration corrected the lung disease, secondary systemic manifestations and normalized disease-related biomarkers, and prevented disease-specific mortality. PMT-derived alveolar macrophages persisted for at least one year as did therapeutic effects. Our findings identify mechanisms regulating alveolar macrophage population size in health and disease, indicate that GM-CSF is required for phenotypic determination of alveolar macrophages, and support translation of PMT as the first specific therapy for children with hPAP. PMID:25274301

Suzuki, Takuji; Arumugam, Paritha; Sakagami, Takuro; Lachmann, Nico; Chalk, Claudia; Sallese, Anthony; Abe, Shuichi; Trapnell, Cole; Carey, Brenna; Moritz, Thomas; Malik, Punam; Lutzko, Carolyn; Wood, Robert E; Trapnell, Bruce C

2014-10-23

320

Cavitary pulmonary metastases  

PubMed Central

Cavitation in pulmonary metastases is more common than might be supposed from the small number of cases (75) previously reported. Twenty-five cases of cavitary pulmonary metastases were seen at the London Chest Hospital from 1964 to 1969. The primary sites were the large intestine (8), opposite lung (4), cervix (3), stomach, oesophagus, pancreas, and larynx (2 each) and anal canal and kidney (1 each). The size of the cavities ranged from 1·0 to 6·0 cm., and their wall thickness from 0·3 to 2·5 cm. Only in three cases was there an identifiable communication with the bronchial tree and only in these three cases were neoplastic cells found in the sputum. The main microscopic feature was vascular invasion, which was found in the vicinity of every metastasis; thrombosis was seen in 14 cases. It seems that the principal cause of necrosis and subsequent cavitation in metastatic tumours of the lung is interference with their blood supply by vascular involvement. Images PMID:5452295

Chaudhuri, M. Ray

1970-01-01

321

Primary pulmonary Hodgkin's lymphoma and a review of the literature since 2006.  

PubMed

A 28-year-old woman of Laotian origin presented with dry cough, fevers, night sweats and weight loss over the preceding 6 weeks. Radiological investigations revealed large complex cavitary lesions in the middle and lower lobes of the right lung, with no mediastinal lymph node enlargement. Bronchoscopic investigations did not yield a diagnosis. CT-guided fine-needle aspiration raised the possibility of Langerhans cell histiocytosis. Open lung biopsy initially supported this, but eventually a microscopic and immunohistochemical diagnosis of Hodgkin's lymphoma was made. The final diagnosis was primary pulmonary Hodgkin's lymphoma. We present a new case as well as a literature review of reported cases published since 2006. PMID:24711477

Cooksley, Nathania; Judge, Daniel James; Brown, James

2014-01-01

322

Application of Sentinel Lymph Node Biopsy in Cutaneous Basosquamous Carcinoma  

PubMed Central

Basosquamous carcinoma of the skin is a relatively rare cutaneous neoplasm that has significant metastatic potential and a metastatic rate greater than that of basal cell and squamous cell carcinoma. We describe the use of lymphatic mapping and sentinel lymph node biopsy in a 63-year-old man after identification of basosquamous carcinoma. Sentinel lymph node biopsy, which is a standard tool to detect regional lymphatic metastasis in cutaneous melanoma, has been rarely employed to detect lymphatic metastasis of basosquamous carcinoma. The approach was successful in detecting a regional lymphatic metastasis of two nodal basins with minor morbidity. Sentinel lymph node biopsy may be useful for certain high-risk lesions of basosquamous carcinoma. PMID:22028558

Kovacevic, Predrag; Visnjic, Milan; Jankovic, Dimitrije; Binic, Ivana; Jankovic, Aleksandar; Ilic, Ivan

2011-01-01

323

Anaphylaxis to isosulfan blue dye during sentinel lymph node biopsy.  

PubMed

We describe a case of intraoperative anaphylaxis resulting from isosulfan blue (IB) dye, an agent being increasingly used for identification of sentinel lymph nodes. A 45-year-old woman undergoing a left mastectomy with sentinel lymph node biopsy under general endotracheal anesthesia developed severe intraoperative hypotension and tachycardia 10 minutes after subcutaneous injection of IB dye for lymphatic mapping. This was associated with a reduction in pulse oximeter reading to 89%. She was successfully resuscitated using 1 mg of epinephrine intravenously (IV). Invasive arterial and central venous pressures were initiated; her lymph node biopsy was concluded, but the rest of her procedure was canceled. Postoperative workup revealed a high tryptase level indicative of an intraoperative anaphylactic reaction most probably related to the IB dye. Isosulfan blue dye can act as an antigen, causing a full-blown intraoperative anaphylactic reaction. Early recognition and aggressive hemodynamic interventions can reduce morbidity and mortality. PMID:16427538

Sandhu, Sukhjit; Farag, Ehab; Argalious, Maged

2005-12-01

324

Radical lymph node dissection for gallbladder cancer: indications and limitations.  

PubMed

Radical lymph node dissection provides survival benefit for patients with pT2 or more advanced gallbladder carcinoma tumors only if potentially curative resection is feasible; it must always be considered when planning a resection or re-resection for robust patients with pT2 or more advanced gallbladder carcinoma tumors. The degree of radical lymphadenectomy depends on clinically assessed nodal status: portal lymph node dissection is limited to cN0 disease; extended portal nodal dissection is indicated for cN0 and a modest degree of cN1 disease; peripancreatic lymph node dissection with pancreaticoduodenectomy is indicated for selected cases of evident peripancreatic nodal disease and/or direct organ involvement. Extended resection with extensive lymphadenectomy should be limited to expert surgeons because it may cause serious morbidity and mortality. PMID:17336245

Shirai, Yoshio; Wakai, Toshifumi; Hatakeyama, Katsuyoshi

2007-01-01

325

Seven synchronous early gastric cancer with 28 lymph nodes metastasis  

PubMed Central

An 85 year male patient complaining epigastric discomfort was admitted. From the esophagogastroduodenoscopy, three early gastric cancer (EGCa) lesions had been identified and these were diagnosed as adenocarcinoma with poorly differentiated cell type. The patient underwent operation. From the post-operative mapping, however, additional 4 EGCa lesions were found, and the patient was diagnosed with 7 synchronous EGCa. Out of the 7 EGCa lesions, 6 had shown invasion only to the mucosal layer and one had shown invasion into the 1/3 layer of submucosa. In spite of such superficial invasions, 28 of 48 lymph nodes had been identified as metastases. The multiple lesions of EGCa do not increase the risk of lymph node metastasis, but if their differentiations are poor or if they have lympho-vascular invasion, multiple lymph node metastases could incur even if the depth of invasion is limited to the mucosal layer or the upper portion of the submucosal layer. PMID:24307810

Seong, Hyeonjin; Kim, Jin Il; Lee, Hyun Jeong; Kim, Hyun Jin; Cho, Hyung Joon; Kim, Hye Kang; Cheung, Dae Young; Kim, Dong Jin; Kim, Wook; Kim, Tae-Jung

2013-01-01

326

RANK is essential for osteoclast and lymph node development  

PubMed Central

The physiological role of the TNF receptor (TNFR) family member, RANK, was investigated by generating RANK-deficient mice. RANK?/? mice were characterized by profound osteopetrosis resulting from an apparent block in osteoclast differentiation. RANK expression was not required for the commitment, differentiation, and functional maturation of macrophages and dendritic cells from their myeloid precursors but provided a necessary and specific signal for the differentiation of myeloid-derived osteoclasts. RANK?/? mice also exhibited a marked deficiency of B cells in the spleen. RANK?/? mice retained mucosal-associated lymphoid tissues including Peyer’s patches but completely lacked all other peripheral lymph nodes, highlighting an additional major role for RANK in lymph node formation. These experiments reveal that RANK provides critical signals necessary for lymph node organogenesis and osteoclast differentiation. PMID:10500098

Dougall, William C.; Glaccum, Moira; Charrier, Keith; Rohrbach, Kathy; Brasel, Kenneth; De Smedt, Thibaut; Daro, Elizabeth; Smith, Jeffery; Tometsko, Mark E.; Maliszewski, Charles R.; Armstrong, Allison; Shen, Victor; Bain, Steven; Cosman, David; Anderson, Dirk; Morrissey, Philip J.; Peschon, Jacques J.; Schuh, JoAnn

1999-01-01

327

Importance of Metastatic Lymph Node Ratio in Non-Metastatic, Lymph Node-Invaded Colon Cancer: A Clinical Trial  

PubMed Central

Background The aim of this study was to evaluate the prognostic importance of the metastatic lymph node ratio for stage III colon cancer patients and to find a cut-off value at which the overall survival and disease-free survival change. Material/Methods Patients with pathological stage III colon cancer were retrospectively evaluated for: age; preoperative values of Crp, Cea, Ca 19-9, and Afp; pathologic situation of vascular, perineural, lymphatic, and serosal involvement; and metastatic lymph node ratio values were calculated. Results The study included 58 stage III colon cancer patients: 20 (34.5%) females and 38 (65.5%) males were involved in the study. Multivariate analysis was applied to the following variables to evaluate significance for overall survival and disease-free survival: age, Crp, Cea, perineural invasion, and metastatic lymph node ratio. The metastatic lymph node ratio (<0.25 or ?0.25) is the only independent variable significant for overall and disease-free survival. Conclusions Metastatic lymph node ratio is an ideal prognostic marker for stage III colon cancer patients, and 0.25 is the cut-off value for prognosis. PMID:25087904

Isik, Arda; Peker, Kemal; Firat, Deniz; Yilmaz, Bahri; Sayar, Ilyas; Idiz, Oguz; Cakir, Coskun; Demiryilmaz, Ismail; Yilmaz, Ismayil

2014-01-01

328

Terminal endothelial cells of lymph capillaries as active transport structures involved in the formation of lymph in rat skin.  

PubMed

Electron microscopic examination of lymph capillaries of the dermal papillae of rat scalp skin revealed continuous extension of the lymph collection system into 4 to 10 micron diameter lumen capillaries with thin walls, scant basement lamellae (membranes), and blind-endings of 1 to 4 micron lumen diameter within endothelial-type cells. These terminal endothelial cells also displayed intracytoplasmic channels and pinocytotic vesicles, extensive cytoplasmic processes and a high cytoplasmic volume-percent of mitochondria suggesting active transport capabilities of lymphatic endothelia. The mitochondrial cytoplasmic volume-percent (mean 14.5%) exceeded that present in blood capillary endothelial cells of the rat brain (the anatomic substrate of the blood-brain barrier), that have a volume-percent of mitochondria of 10 to 12% (1). Active transport processes centered in such endothelial cells could account for a portion of lymph formation, and explain the continued accumulation of lymphedema distal to blocked lymphatic collection ducts when lymphatic intraluminal pressure is greatly increased. The small lumen diameter capillaries, which correspond spatially to the prelymphatics of other authors (2), typically converge in groups of three to form larger diameter lymph capillaries corresponding to the lymph "initials" previously described (2,3). PMID:8355520

Cornford, M E; Oldendorf, W H

1993-06-01

329

The migration of synthetic magnetic nanoparticle labeled dendritic cells into lymph nodes with optical imaging  

PubMed Central

Background The successful biotherapy of carcinoma with dendritic cell (DC) vaccines pivotally relies on DCs’ migratory capability into lymph tissues and activation of T cells. Accurate imaging and evaluation of DC migration in vivo have great significance during antitumor treatment with DC vaccine. We herein examined the behavior of DCs influenced by synthetic superparamagnetic iron oxide (SPIO) nanoparticle labeling. Methods ?-Fe2O3 nanoparticles were prepared and DCs, which were induced from bone marrow monocytes of enhanced green fluorescent protein (EGFP) transgenic mice, were labeled. The endocytosis of the SPIO, surface molecules, cell apoptosis and fluorescence intensity of EGFP-DCs were displayed by Prussian blue staining and flow cytometry (FCM), respectively. After EGFP-DCs, labeled with SPIO, were injected into footpads (n = 5) for 24 hours, the mice were examined in vivo by optical imaging (OPI). Meanwhile, confocal imaging and FCM were applied, respectively, to detect the migration of labeled DCs into draining lymph nodes. Results Nearly 100% of cells were labeled by the SPIO, in which the intracellular blue color gradually deepened and the iron contents rose with the increase of labeling iron concentrations. In addition, cell apoptosis and the surface molecules on DCs were at similar levels after SPIO labeling. After confirming that the fluorescence intensity of EGFP on DCs was not influenced by SPIO, the homing ability of EGFP-DCs labeled with SPIO displayed that the fluorescence intensity and the ratios of EGFP-DCs in draining lymph nodes were gradually decreased with the increase of labeling iron concentrations. Conclusion The synthetic SPIO nanoparticles possess perfect labeling ability and biocompatibility. Moreover, DCs labeled with a low dose of SPIO showed stronger migratory capability in vivo. PMID:24124362

Su, Hang; Mou, Yongbin; An, Yanli; Han, Wei; Huang, Xiaofeng; Xia, Guohua; Ni, Yanhong; Zhang, Yu; Ma, Jianmin; Hu, Qingang

2013-01-01

330

Robust automated lymph node segmentation with random forests  

NASA Astrophysics Data System (ADS)

Enlarged lymph nodes may indicate the presence of illness. Therefore, identification and measurement of lymph nodes provide essential biomarkers for diagnosing disease. Accurate automatic detection and measurement of lymph nodes can assist radiologists for better repeatability and quality assurance, but is challenging as well because lymph nodes are often very small and have a highly variable shape. In this paper, we propose to tackle this problem via supervised statistical learning-based robust voxel labeling, specifically the random forest algorithm. Random forest employs an ensemble of decision trees that are trained on labeled multi-class data to recognize the data features and is adopted to handle lowlevel image features sampled and extracted from 3D medical scans. Here we exploit three types of image features (intensity, order-1 contrast and order-2 contrast) and evaluate their effectiveness in random forest feature selection setting. The trained forest can then be applied to unseen data by voxel scanning via sliding windows (11×11×11), to assign the class label and class-conditional probability to each unlabeled voxel at the center of window. Voxels from the manually annotated lymph nodes in a CT volume are treated as positive class; background non-lymph node voxels as negatives. We show that the random forest algorithm can be adapted and perform the voxel labeling task accurately and efficiently. The experimental results are very promising, with AUCs (area under curve) of the training and validation ROC (receiver operating characteristic) of 0.972 and 0.959, respectively. The visualized voxel labeling results also confirm the validity.

Allen, David; Lu, Le; Yao, Jianhua; Liu, Jiamin; Turkbey, Evrim; Summers, Ronald M.

2014-03-01

331

The unusual symmetric reopening effect induced by pulmonary surfactant.  

PubMed

This study investigates the stability of a finger of air as it propagates into a liquid-filled model of a liquid-filled model of a pulmonary bifurcation. We seek to elucidate the stability characteristics of the reopening of daughter airways, an event that may be important to the treatment of acute lung disease. To do so, we investigated the symmetry of reopening under conditions of nearly constant surface tension with 1) purified H2O or 2) an anionic surfactant (sodium dodecyl sulfate). Dynamic surface tension was investigated using pulmonary surfactant (Infasurf) with and without the presence of albumin. Flow visualization was accomplished using a microparticle image velocimetry (?-PIV)/shadowgraph system through which we measured 1) the propagation velocity of the finger of air that reopens each daughter branch, and 2) the instantaneous and averaged velocity field of liquid phase surrounding the tip of the propagating bubble. Only pulmonary surfactant demonstrated the ability of maintaining a nearly symmetric propagation in the daughter channels, which is likely to lead to homogeneous airway reopening. In contrast, when pulmonary surfactant was inactivated by albumin or when the system was held at a nearly constant surface tension, reopening occurred asymmetrically. Our analysis suggests that Infasurf's dynamic surface tension qualities are important to stabilize the removal of liquid obstructions. This demonstrates a new important function of pulmonary surfactant for airway reopening of a multibranched network. PMID:24458752

Yamaguchi, Eiichiro; Giannetti, Matthew J; Van Houten, Matthew J; Forouzan, Omid; Shevkoplyas, Sergey S; Gaver, Donald P

2014-03-15

332

Pulmonary thromboendarterectomy for chronic thromboembolic obstruction of the pulmonary artery in piglets  

Microsoft Academic Search

Objective: The 2 main causes of death after thromboendarterectomy for chronic pulmonary thromboembolism are incomplete repermeabilization responsible for persistent pulmonary hypertension and acute high-permeability pulmonary edema. We wish to establish an experimental model of chronic pulmonary thromboembolism to replicate the conditions encountered during and after pulmonary thromboendarterectomy. Methods: Multiple-curled coils and tissue adhesive were embolized in 6 piglets to induce

Elie Fadel; Jean Yves Riou; Michel Mazmanian; Philippe Brenot; Elisabeth Dulmet; Hélène Detruit; Alain Serraf; Emile A. Bacha; Philippe Herve; Philippe Dartevelle

1999-01-01

333

Novel imaging modalities for lymph node imaging in urologic oncology.  

PubMed

Accurate lymph node staging in genitourinary (GU) malignancies is important for planning an appropriate treatment and establishing an accurate prognosis. This article discusses the novel imaging techniques for detection of metastases in various GU malignancies, including prostate, bladder, penile, and testicular cancers. Discussion includes nuclear medicine techniques of (18)F-fluorodeoxyglucose positron emission tomography/computed tomography (PET/CT), (11)C-choline and (18)F-choline PET/CT, and ProstaScint scanning, as well as sentinel lymph node mapping. Magnetic resonance (MR) techniques include lymphotropic nanoparticle-enhanced MR imaging and diffusion-weighted MR imaging. PMID:22045178

Chernyak, Victoria

2011-11-01

334

Imaging in assessing lymph node status in gastric cancer  

Microsoft Academic Search

Background  Accurate assessment of lymph node status is of crucial importance for appropriate treatment planning and determining prognosis\\u000a in patients with gastric cancer. The aim of this study was to systematically review the current role of imaging in assessing\\u000a lymph node (LN) status in gastric cancer.\\u000a \\u000a \\u000a \\u000a Methods  A systematic literature search was performed in the PubMed\\/MEDLINE and Embase databases. The methodological quality

Robert Michael Kwee; Thomas Christian Kwee

2009-01-01

335

Pathology Case Study: Enlarged Left Inguinal Lymph Node  

NSDL National Science Digital Library

The Department of Pathology at the University of Pittsburgh Medical Center has compiled a wide range of pathology case studies to aid students and instructors in the medical/health science field. This case involves the diagnosis of a fifty-nine year old female with an enlarged inguinal lymph node. Both gross and microscopic descriptions and images of the lymph node are provided to aid in the diagnosis of the patient. The final diagnosis is included, which allows students to check their own conclusions. This is an excellent resource for providing students experience with patient history, lab results and diagnostics.

Nine, Jeff S.

2007-11-26

336

Tetralogy of Fallot with severe pulmonary valvar stenosis and pulmonary vascular sling (anomalous origin of the left pulmonary artery from the right pulmonary artery)  

Microsoft Academic Search

A patient with the rare combination of tetralogy of Fallot with severe pulmonary valvar stenosis and pulmonary vascular sling is presented. The limitations imposed by pulmonary artery hypoplasia on the display of pulmonary vascular sling by conventional imaging techniques are discussed.

Kenneth A. Murdison; Paul M. Weinberg

1991-01-01

337

REVIEW Open Access Pulmonary arterial hypertension  

E-print Network

,2,3 and Olivier Sitbon1,2,3* Abstract Pulmonary arterial hypertension (PAH) is a chronic and progressive disease) or Smad8 genes. Pulmonary veno occusive disease and pulmonary capillary hemagiomatosis are individualized and designated as clinical group 1'. Group 2 'Pulmonary hypertension due to left heart diseases' is divided

Paris-Sud XI, Université de

338

Potassium channel diversity in the pulmonary arteries and pulmonary veins: Implications for regulation of the pulmonary vasculature in health and during pulmonary hypertension  

Microsoft Academic Search

This review describes the ionic heterogeneity manifest in the pulmonary circulation, particularly as it pertains to hypoxic pulmonary vasoconstriction (HPV) and pulmonary arterial hypertension (PAH). Heterogeneity in potassium (K+) channels, key regulators of vascular tone, cell proliferation, and apoptosis rates, contribute to the diverse response of vascular segments to hypoxia and to the localization of pathological changes in PAH. Pulmonary

Sébastien Bonnet; Stephen L. Archer

2007-01-01

339

Pulmonary fibrosis: pathogenesis, etiology and regulation  

Microsoft Academic Search

Pulmonary fibrosis and architectural remodeling of tissues can severely disrupt lung function, often with fatal consequences. The etiology of pulmonary fibrotic diseases is varied, with an array of triggers including allergens, chemicals, radiation and environmental particles. However, the cause of one of the most common pulmonary fibrotic conditions, idiopathic pulmonary fibrosis (IPF), is still unclear. This review examines common mechanisms

M S Wilson; T A Wynn

2009-01-01

340

Generation of experimental allergic airways inflammation in the absence of draining lymph nodes  

PubMed Central

The objective of this study was to investigate the contribution of secondary lymphoid organs in the generation and maintenance of experimental allergic airway inflammation. We employed a previously reported murine model of respiratory mucosal allergic sensitization, induced by repeated aerosolizations of ovalbumin in the context of a GM-CSF airway environment. We executed this protocol in wild-type (WT) and lymphotoxin-?–deficient mice (LT?-KO) mice, which are devoid of lymph nodes (LNs) and possess rudimentary spleen structures. Despite the lack of pulmonary LNs draining the airway compartment, LT?-KO mice were fully capable of mounting a robust inflammatory response in the airways, consisting of Th2 polarized CD4+ T cells and eosinophils. This was accompanied by IL-5, IL-13, and IFN-? production by splenocytes and generation of ovalbumin-specific serum IgE. Exposure to the same antigen 7 weeks after complete resolution of airway inflammation once again induced a Th2 polarized infiltrate, demonstrating intact immunological memory. To investigate inherent plasticity in establishing antigen-specific immunity, mice were splenectomized before sensitization. Allergic sensitization was completely abrogated in splenectomized LT?-KO mice, compared with eusplenic LT?-KO controls. These data demonstrate that secondary lymphoid organs, either LN or spleen, are essential for the generation of allergic airway responses. PMID:11518731

Gajewska, Beata U.; Alvarez, David; Vidric, Mariana; Goncharova, Susanna; Stampfli, Martin R.; Coyle, Anthony J.; Gutierrez-Ramos, Jose-Carlos; Jordana, Manel

2001-01-01

341

Lymphangioleiomyomatosis: pulmonary and abdominal findings with pathologic correlation.  

PubMed

Lymphangioleiomyomatosis (LAM) is a rare disease characterized by pulmonary cysts at computed tomography (CT) and proliferation of abnormal smooth muscle cells at lung biopsy. Almost all patients are female, and all have pulmonary cysts at high-resolution CT. Although the presence of cysts may be suggested at conventional CT or chest radiography, high-resolution CT is superior for cyst detection and is essential for diagnosis. The cysts are typically round; in most cases, the cyst wall is barely seen at thin-section CT. They are typically diffusely distributed throughout the central and peripheral lung parenchyma. The lung bases are affected in all patients. Some patients also have increased lung attenuation or a reticular pattern. Expiratory CT shows no air trapping between the cysts, and most of the cysts decrease in size. Pneumothorax, pleural effusion, and chylothorax are complications of LAM. Certain abdominal findings may provide additional corroborative evidence of the diagnosis. Renal angiomyolipomas, the most frequent abdominal lesions, usually manifest as asymptomatic, small, bilateral tumors of fat attenuation in the renal cortex. Lymphangiomas are cystic retroperitoneal masses that occur in up to 20% of patients. Other CT findings are hypo- or hyperattenuating lymph nodes, a dilated thoracic duct, and ascites. PMID:12376610

Pallisa, Esther; Sanz, Pilar; Roman, Antonio; Majó, Joaquim; Andreu, Jordi; Cáceres, José

2002-10-01

342

Cryptococcosis, silicosis, and tuberculous pseudotumor in the same pulmonary lobe*  

PubMed Central

Tuberculosis and cryptococcosis are infectious diseases that can result in the formation of single or multiple nodules in immunocompetent patients. Exposure to silica is known to raise the risk of infection with Mycobacterium tuberculosis. We report the case of an elderly man with no history of opportunistic infections and no clinical evidence of immunodeficiency but with a six-month history of dry cough and nocturnal wheezing. A chest X-ray revealed a mass measuring 5.0 × 3.5 cm in the right upper lobe. The diagnostic approach of the mass revealed tuberculosis. The histopathological analysis of the surrounding parenchyma reveled silicosis and cryptococcosis. Cryptococcosis was also found in masses identified in the mediastinal lymph nodes. The surgical approach was indicated because of the degree of pleuropulmonary involvement, the inconclusive results obtained with the invasive and noninvasive methods applied, and the possibility of malignancy. This case illustrates the difficulty inherent to the assessment of infectious or inflammatory pulmonary pseudotumors, the differential diagnosis of which occasionally requires a radical surgical approach. Despite the presence of respiratory symptoms for six months, the first chest X-ray was performed only at the end of that period. We discuss the possible pathogenic mechanisms that might have led to the combination of three types of granulomatous lesions in the same lobe, and we emphasize the need for greater awareness of atypical presentations of pulmonary tuberculosis. PMID:24310636

da Silva, Geruza Alves; Brandao, Daniel Ferracioli; Vianna, Elcio Oliveira; de Sa, Joao Batista Carlos; Baddini-Martinez, Jose

2013-01-01

343

Intraoperative identification of esophageal sentinel lymph nodes with near-infrared fluorescence imaging  

PubMed Central

Objective In esophageal cancer, selective removal of involved lymph nodes could improve survival and limit complications from extended lymphadenectomy. Mapping with vital blue dyes or technetium Tc-99m often fails to identify intrathoracic sentinel lymph nodes. Our purpose was to develop an intraoperative method for identifying sentinel lymph nodes of the esophagus with high-sensitivity near-infrared fluorescence imaging. Methods Six Yorkshire pigs underwent thoracotomy and received submucosal, esophageal injection of quantum dots, a novel near-infrared fluorescent lymph tracer designed for retention in sentinel lymph nodes. Six additional pigs underwent thoracotomy and received submucosal esophageal injection of CW800 conjugated to human serum albumin, another novel lymph tracer designed for uptake into distant lymph nodes. Finally, 6 pigs received submucosal injection of the fluorophore-conjugated albumin with an endoscopic needle through an esophagascope. These lymph tracers fluoresce in the near-infrared, permitting visualization of migration to sentinel lymph nodes with a custom intraoperative imaging system. Results Injection of the near-infrared fluorescent lymph tracers into the esophagus revealed communicating lymph nodes within 5 minutes of injection. In all 6 pigs that received quantum dot injection, only a single sentinel lymph node was identified. Among pigs that received fluorophore-conjugated albumin injection, in 5 o f 12 a single sentinel lymph node was revealed, but in 7 o f 12 two sentinel lymph nodes were identified. There was no dominant pattern in the appearance of the sentinel lymph nodes either cranial or caudal to the injection site. Conclusion Near-infrared fluorescence imaging of sentinel lymph nodes is a novel and reliable intraoperative technique with the power to assist with identification and resection of esophageal sentinel lymph nodes. PMID:15821653

Parungo, Cherie P.; Ohnishi, Shunsuke; Kim, Sang-Wook; Kim, Sunjee; Laurence, Rita G.; Soltesz, Edward G.; Chen, Frederick Y.; Colson, Yolonda L.; Cohn, Lawrence H.; Bawendi, Moungi G.; Frangioni, John V.

2005-01-01

344

Lung blood flow studies in patients with scoliosis and neuromuscular weakness  

PubMed Central

Pulmonary capillary blood flow was measured by the nitrous oxide body plethysmograph technique in 16 patients, 10 of whom had scoliosis and six neuromuscular weakness. A linear correlation was found between the pulmonary artery to capillary flow conduction time and Pao2 (r=+0·85; p<0·001). The finding of a reduced flow conduction time and its correlation with the Pao2 suggests the presence of pulmonary arterial hypertension presumably on the basis of active vasoconstriction. PMID:4731116

Littler, W. A.; Reuben, S. R.; Lane, D. J.

1973-01-01

345

Particle velocity measurements with macroscopic fluorescence imaging in lymph tissue mimicking microfluidic phantoms  

NASA Astrophysics Data System (ADS)

Ultrasound poroelastography can quantify structural and mechanical properties of tissues such as stiffness, compressibility, and fluid flow rate. This novel ultrasound technique is being explored to detect tissue changes associated with lymphatic disease. We have constructed a macroscopic fluorescence imaging system to validate ultrasonic fluid flow measurements and to provide high resolution imaging of microfluidic phantoms. The optical imaging system is composed of a white light source, excitation and emission filters, and a camera with a zoom lens. The field of view can be adjusted from 100 mm x 75 mm to 10 mm x 7.5 mm. The microfluidic device is made of polydimethylsiloxane (PDMS) and has 9 channels, each 40 ?m deep with widths ranging from 30 ?m to 200 ?m. A syringe pump was used to propel water containing 15 ?m diameter fluorescent microspheres through the microchannels, with flow rates ranging from 0.5 ?l/min to 10 ?l/min. Video was captured at a rate of 25 frames/sec. The velocity of the microspheres in the microchannels was calculated using an algorithm that tracked the movement of the fluorescent microspheres. The imaging system was able to measure particle velocities ranging from 0.2 mm/sec to 10 mm/sec. The range of flow velocities of interest in lymph vessels is between 1 mm/sec to 10 mm/sec; therefore our imaging system is sufficient to measure particle velocity in phantoms modeling lymphatic flow.

Hennessy, Ricky; Koo, Chiwan; Ton, Phuc; Han, Arum; Righetti, Raffaella; Maitland, Kristen C.

2011-03-01

346

Proliferative Expansion and Acquisition of Effector Activity by Memory CD4+ T Cells in the Lungs following Pulmonary Virus Infection1  

PubMed Central

The memory CD4+ T cell response to the respiratory syncytial virus (RSV) attachment (G) protein in the lungs of primed BALB/c mice undergoing challenge pulmonary RSV infection is dominated by effector T cells expressing a single V?-chain, V?14. We have used V?14 expression to examine the kinetics of the activation, accumulation, and acquisition of the effector activity of memory CD4+ T cells responding to pulmonary infection. This analysis revealed that proliferative expansion and effector CD4+ T cell differentiation preferentially occur in the respiratory tract following rapid activation within and egress from the lymph nodes draining the respiratory tract. These findings suggest that, in response to natural infection at a peripheral mucosal site such as the lungs, memory CD4+ T cell expansion and differentiation into activated effector T cells may occur predominantly in the peripheral site of infection rather than exclusively in the lymph nodes draining the site of infection. PMID:18292518

Wissinger, Erika L.; Stevens, Whitney W.; Varga, Steven M.; Braciale, Thomas J.

2009-01-01

347

Acute pulmonary embolism after pneumonectomy  

PubMed Central

Pulmonary embolism (PE) by occlusion of the pulmonary arterial bed may lead to acute life-threatening but potentially reversible right ventricular failure, one of the most severe complications of thoracic surgery. Still, the incidence of acute pulmonary embolism after surgery is reduced by comprehensive anticoagulant prevention, improved surgical techniques, appropriate perioperative management and early ambulation. However, there is difficulty in diagnosing PE after thoracic surgery due to the lack of specific clinical manifestations. So that optimal diagnostic strategy and management according to the clinical presentation and estimated risk of an adverse outcome is fundamental. PMID:22295170

Wang, Zongfei; Pei, Chu; Ma, Lunchao; Wang, Daoyuan; Zhou, Jiangfen; Wang, Wei; Shen, Jianfei; Xu, Zhiqiang; He, Jianxing

2012-01-01

348

Palliative care and pulmonary rehabilitation.  

PubMed

Numerous barriers exist to the timely introduction of palliative care in patients with advanced chronic obstructive pulmonary disease (COPD). The complex needs of patients with advanced COPD require the integration of curative-restorative care and palliative care. Palliative care and pulmonary rehabilitation are both important components of integrated care for patients with chronic respiratory diseases. Pulmonary rehabilitation provides the opportunity to introduce palliative care by implementing education about advance care planning. Education about advance care planning addresses the information needs of patients and can be an effective strategy to promote patient-physician discussion about these issues. PMID:24874135

Janssen, Daisy J A; McCormick, James R

2014-06-01

349

An Earth-based Model of Microgravity Pulmonary Physiology  

NASA Technical Reports Server (NTRS)

There are currently only two practical methods of achieving microgravity for experimentation: parabolic flight in an aircraft or space flight, both of which have limitations. As a result, there are many important aspects of pulmonary physiology that have not been investigated in microgravity. We propose to develop an earth-based animal model of microgravity by using liquid ventilation, which will allow us to fill the lungs with perfluorocarbon, and submersing the animal in water such that the density of the lungs is the same as the surrounding environment. By so doing, we will eliminate the effects of gravity on respiration. We will first validate the model by comparing measures of pulmonary mechanics, to previous space flight and parabolic flight measurements. After validating the model, we will investigate the impact of microgravity on aspects of lung physiology that have not been previously measured. These will include pulmonary blood flow distribution, ventillation distribution, pulmonary capillary wedge pressure, ventilation-perfusion matching and pleural pressures and flows. We expect that this earth-based model of microgravity will enhance our knowledge and understanding of lung physiology in space which will increase in importance as space flights increase in time and distance.

Hirschl, Ronald B.; Bull, Joseph L.; Grotberg, James B.

2004-01-01

350

Transcatheter Arterial Embolization With Spherical Embolic Agent for Pulmonary Metastases From Renal Cell Carcinoma  

SciTech Connect

Purpose: This retrospective study aimed to evaluate the safety and local efficacy of transcatheter arterial embolization (TAE) with superabsorbent polymer microspheres (SAP-MS) in patients with pulmonary metastases from renal cell carcinoma (RCC). Methods: Sixteen patients with unresectable pulmonary metastases from RCC refractory to standard therapy were enrolled to undergo TAE with the purpose of mass reduction and/or palliation. The prepared SAP-MS swell to approximately two times larger than their dry-state size (100-150 {mu}m [n = 14], 50-100 {mu}m [n = 2]). Forty-nine pulmonary nodules (lung n = 22, mediastinal lymph node n = 17, and hilar lymph node n = 10) were selected as target lesions for evaluation. Local tumor response was evaluated 3 months after TAE according to Response Evaluation Criteria in Solid Tumors (RECIST; version 1.1). The relationship between tumor enhancement ratio by CT during selective angiography and local tumor response was evaluated. Results: The number of TAE sessions per patient ranged from 1 to 5 (median 2.9). Embolized arteries at initial TAE were bronchial arteries in 14 patients (87.5 %) and nonbronchial systemic arteries in 11 patients (68.8 %). Nodule-based evaluation showed that 5 (10.2 %) nodules had complete response, 17 (34.7 %) had partial response, 15 (30.6 %) had stable disease, and 12 (24.5 %) had progressive disease. The response rate was significantly greater in 22 lesions that had a high tumor enhancement ratio than in 27 lesions that had a slight or moderate ratio (90.9 vs. 7.4 %, p = 0.01). Severe TAE-related adverse events did not occur. Conclusion: TAE with SAP-MS might be a well-tolerated and locally efficacious palliative option for patients with pulmonary metastases from RCC.

Seki, Akihiko, E-mail: sekia@igtc.jp; Hori, Shinichi, E-mail: horishin@igtc.jp; Sueyoshi, Satoru, E-mail: sueyoshis@igtc.jp; Hori, Atsushi, E-mail: horiat@igtc.jp; Kono, Michihiko, E-mail: konom@igtc.jp; Murata, Shinichi, E-mail: muratas@igtc.jp; Maeda, Masahiko, E-mail: maedam@igtc.jp [Gate Tower Institute for Image Guided Therapy, Department of Radiology (Japan)] [Gate Tower Institute for Image Guided Therapy, Department of Radiology (Japan)

2013-12-15

351

Tumors of the Pulmonary Vascular Bed  

Microsoft Academic Search

\\u000a Primary or secondary tumors of the lung can affect all levels of the pulmonary vascular bed, including the pulmonary arteries,\\u000a veins, and capillaries. Most primary tumors of the pulmonary vasculature are poorly differentiated, highly fatal sarcomas\\u000a of the large main pulmonary arteries and veins. Pulmonary arterial sarcoma (PAS) is far more prevalent than its venous counterpart,\\u000a although both arterial and

Eunhee S. Yi

352

Increased secretion of insulin and proliferation of islet {beta}-cells in rats with mesenteric lymph duct ligation  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer Insulin secretion was increased during the OGTT or IVGTT in mesenteric lymph duct-ligated rats. Black-Right-Pointing-Pointer Proliferation of islet {beta}-cells was upregulated in lymph duct-ligated rats. Black-Right-Pointing-Pointer Mesenteric lymph duct flow has a role in glucose metabolism. -- Abstract: Background and aims: It has been suggested that intestinal lymph flow plays an important role in insulin secretion and glucose metabolism after meals. In this study, we investigated the influence of ligation of the mesenteric lymph duct on glucose metabolism and islet {beta}-cells in rats. Methods: Male Sprague-Dawley rats (10 weeks old) were divided into two groups: one underwent ligation of the mesenteric lymph duct above the cistern (ligation group), and the other underwent a sham operation (sham group). After 1 and 2 weeks, fasting plasma concentrations of glucose, insulin, triglyceride, glucose-dependent insulinotropic polypeptide (GIP), and the active form of glucagon-like peptide-1 (GLP-1) were measured. At 2 weeks after the operation, the oral glucose tolerance test (OGTT) and intravenous glucose tolerance test (IVGTT) were performed. After the rats had been sacrificed, the insulin content of the pancreas was measured and the proliferation of {beta}-cells was assessed immunohistochemically using antibodies against insulin and Ki-67. Results: During the OGTT, the ligation group showed a significant decrease in the plasma glucose concentration at 120 min (p < 0.05) and a significant increase in the plasma insulin concentration by more than 2-fold at 15 min (p < 0.01). On the other hand, the plasma GIP concentration was significantly decreased at 60 min (p < 0.01) in the ligated group, while the active form of GLP-1 showed a significantly higher level at 90 min (1.7-fold; p < 0.05) and 120 min (2.5-fold; p < 0.01). During the IVGTT, the plasma insulin concentration in the ligation group was significantly higher at 2 min (more than 1.4-fold; p < 0.05). Immunohistochemistry showed that the ratios of {beta}-cell area/acinar cell area and {beta}-cell area/islet area, and also {beta}-cell proliferation, were significantly higher in the ligation group than in the sham group (p < 0.05, p < 0.01 and p < 0.01, respectively). The insulin content per unit wet weight of pancreas was also significantly increased in the ligation group (p < 0.05). Conclusions: In rats with ligation of the mesenteric lymph duct, insulin secretion during the OGTT or IVGTT was higher, and the insulin content and {beta}-cell proliferation in the pancreas were also increased. Our data show that mesenteric lymph duct flow has a role in glucose metabolism.

Nagino, Ko; Yokozawa, Junji; Sasaki, Yu; Matsuda, Akiko; Takeda, Hiroaki [Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585 (Japan)] [Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585 (Japan); Kawata, Sumio, E-mail: Sumio_Kawata@pref.hyogo.lg.jp [Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585 (Japan) [Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585 (Japan); Hyogo Prefectural Nishinomiya Hospital, 13-9 Rokutanji-cho, Nishinomiya 662-0918 (Japan)

2012-08-24

353

Postextubation pulmonary edema: an unusual cause of transient pulmonary edema.  

PubMed

We report a case of sudden onset of respiratory distress caused by pulmonary edema due to laryngospasm. The diagnosis was established by the clinical context and chest X-ray. A CT-scan was performed to narrow down the differential diagnosis and to confirm the diagnosis. Postextubation pulmonary edema due to laryngospasm is a rare entity with a typical clinical and radiographic presentation. PMID:23610874

Carels, K; Herpels, V; Cardoen, L; Lecluyse, C; Traen, S; Verschakelen, J

2013-01-01

354

Mst1 controls lymphocyte trafficking and interstitial motility within lymph nodes.  

PubMed

The regulation of lymphocyte adhesion and migration plays crucial roles in lymphocyte trafficking during immunosurveillance. However, our understanding of the intracellular signalling that regulates these processes is still limited. Here, we show that the Ste20-like kinase Mst1 plays crucial roles in lymphocyte trafficking in vivo. Mst1(-/-) lymphocytes exhibited an impairment of firm adhesion to high endothelial venules, resulting in an inefficient homing capacity. In vitro lymphocyte adhesion cascade assays under physiological shear flow revealed that the stopping time of Mst1(-/-) lymphocytes on endothelium was markedly reduced, whereas their L-selectin-dependent rolling/tethering and transition to LFA-1-mediated arrest were not affected. Mst1(-/-) lymphocytes were also defective in the stabilization of adhesion through alpha4 integrins. Consequently, Mst1(-/-) mice had hypotrophic peripheral lymphoid tissues and reduced marginal zone B cells and dendritic cells in the spleen, and defective emigration of single positive thymocytes. Furthermore, Mst1(-/-) lymphocytes had impaired motility over lymph node-derived stromal cells and within lymph nodes. Thus, our data indicate that Mst1 is a key enzyme involved in lymphocyte entry and interstitial migration. PMID:19339990

Katagiri, Koko; Katakai, Tomoya; Ebisuno, Yukihiko; Ueda, Yoshihiro; Okada, Takaharu; Kinashi, Tatsuo

2009-05-01

355

Pulmonary alveolar proteinosis.  

PubMed

Pulmonary alveolar proteinosis (PAP) is a rare disorder characterized by the accumulation of surfactant lipids and protein in the alveolar spaces, with resultant impairment in gas exchange. The clinical course can be variable, ranging from spontaneous resolution to respiratory failure and death. PAP in all forms is caused by excessive accumulation of surfactant within the alveolar spaces. Autoimmune PAP accounts for the vast majority of cases in humans and is caused by autoantibodies to granulocyte-macrophage colony-stimulating factor (GM-CSF), which results in impaired catabolism and clearance of surfactant lipids and proteins. Inherited or congenital forms of PAP are exceptionally rare and caused by mutations of genes encoding for surfactant proteins. Secondary forms of PAP are associated with diverse clinical disorders and are caused by reduced alveolar macrophage numbers or function with resultant reduced pulmonary clearance of surfactant. PAP is characterized by progressive exertional dyspnea and nonproductive cough with hypoxemia. Bilateral infiltrates are typically present on chest radiograph, and high-resolution computed tomography reveals diffuse ground-glass opacities and airspace consolidation with interlobular septal thickening in a characteristic "crazy paving" pattern. Although surgical lung biopsy will provide a definitive diagnosis, a combination of typical clinical and imaging features with periodic acid-Schiff (PAS)-positive material on bronchoalveolar lavage and transbronchial biopsies is usually sufficient. The standard of care for treatment of PAP remains whole lung lavage, but treatment is not required in all patients. Autoimmune PAP has also been successfully treated with GM-CSF, both inhaled and systemic, but the optimal dose, duration, and route of administration of GM-CSF have not been elucidated. PMID:23001804

Wang, Tisha; Lazar, Catherine A; Fishbein, Michael C; Lynch, Joseph P

2012-10-01

356

[Pathophysiology of development of pulmonary hypertension after acute pulmonary embolism].  

PubMed

Acute pulmonary embolism (PE) is the life-threatening condition with high incidence and mortality where the death is the result of pulmonary hypertension followed by right side heart failure. There are two important mechanisms concerned in the development of pulmonary embolism--induced pulmonary hypertension--mechanic obstruction of pulmonary vessels by the embolus and vasoconstriction. The effect of mechanic obstruction is quite clear, in contrast to the role of vasoconstriction. Activation of endothelial cells, thrombocytes and leucocytes, which release vasoconstricting substances (ET-1, 5-HT etc.) and production of reactive oxygen species (ROS) are the most important factors causing the vasoconstriction after PE. ROS are produced as a result of hypoxia, increased (and decreased) shear stress and are released from activated leukocytes. Vasoconstriction after PE is caused by change of conformation voltage-gated potassium channels, the decrease of vasodilatation effect of NO and activation of matrix metalloproteinases.. Most of the current therapeutic protocols in PE are focused on mechanic obstruction of pulmonary vessels. Thus, the research of the role of vasoconstriction in PE and potentially protective factors in vasocostriction--induced injury represent clinically highly important field. PMID:22737942

Mizera, Roman

2012-01-01

357

Radiotherapy of Internal Mammary Lymph Nodes in Breast Cancer  

Microsoft Academic Search

Background: Radiotherapy of internal mammary lymph nodes (IMN) in breast cancer is discussed controversially due to its potential toxicity and debatable efficacy. Aim of the present study was to assess the cardiac and lung dose in 3-D planned radiotherapy and to discuss these results with regard to arguments pro and contra IMN irradiation. Patients and Methods: 32 patients underwent 3-D

Marie-Luise Sautter-Bihl; Beatrix Hültenschmidt; Ute Melcher; Hans Ulrich Ulmer

2002-01-01

358

Tattoo Pigment Mimics Positive Sentinel Lymph Node in Melanoma  

Microsoft Academic Search

A 42-year-old man with metastasizing melanoma from an unknown primary is presented. Initially a subcutaneous metastasis in the scapular region and a single lung metastasis were resected. Thorough examinations did not show any evidence of a primary tumour. From the site of the metastasis on the right scapular region, lymphoscintigraphy with axillary sentinel lymph node biopsy was performed. One axillary

M. Moehrle; H. J. Blaheta; P. Ruck

2001-01-01

359

Sentinel Lymph Node - Work Hypothesis in Sinonasal Carcinoma Treatment  

PubMed Central

ABSTRACT Although rare, sinonasal malignancies (SNM) can be lesions of immense importance. Approximately 60-70% of sinonasal malignancies (SNM) occur in the maxillary sinus and 20-30% occurs in the nasal cavity itself. The lymphatic drainage of the sinuses and nasal cavity include levels I-III as well as the parapharyngian nodes. Elective regional lymph node dissections became controversial because of overtreatment of the many patients without lymph node metastases. Lymphatic metastasis is the most important mechanism of spread in sinonasal squamous cell carcinoma considering the vast network of vessels in this area. The indications and type of neck dissection to be performed in the positive node neck and management of the N0 neck remain controversial. The sentinel lymph node concept is based on the Halsted theory that stressed the importance of locoregional cancer treatment because of the far site spread. Each patient with head and neck malignancies, including sinonasal carcinoma have about 2-3 sentinel lymph nodes of which up to 40% of them contain metastases. PMID:22879846

ENE, Patricia; POPESCU, Radu Cristian; VOICULESCU, Stefan; SCAUNASU, Razvan; POPESCU, Bogdan; GRIGORE, Raluca; ENE, Razvan; CARSTOIU, Catalin

2011-01-01

360

Sentinel Lymph Node Detection in Patients with Cervical Cancer  

Microsoft Academic Search

Purpose. We investigated the validity of sentinel lymph node (SLN) detection after radioactive isotope and\\/or blue dye injection in patients with cervical cancer.Patients and methods. Between December 1998 and May 2000, 50 patients (mean age 44 years) with cervical cancer FIGO stage I (n = 32), stage II (n = 16), or stage IV (n = 2) underwent SLN detection

Sabine Malur; Norman Krause; Christhardt Köhler; Achim Schneider

2001-01-01

361

A Spatially-Organized Multicellular Innate Immune Response in Lymph  

E-print Network

inflammasome-generated IL-18 and addi- tional cytokine signals from the pathogen-sensing phagocytes. This leads spread of lymph- borne bacteria. These findings extend our under- standing of the functional significance the rapid acquisition of viruses and nano-particles by SCS macrophages and the transfer of some undegraded

362

Diagnostic Features and Subtyping of Thymoma Lymph Node Metastases  

PubMed Central

Aim. The purpose of the present study was to characterize the morphological features of thymoma metastases in lymph nodes and to evaluate the possibility of their subtyping according to the 2004 WHO classification of thymus tumors. Materials and Methods. We reviewed 210 thymoma cases in our series of thymic epithelial tumors (TET), including their recurrences and lymphogenous metastases. Three cases of lymph node metastases, one case occurring synchronously with the primary tumor and one synchronously with the first relapse (both in intrathoracic location) and one case of metastasis observed in a laterocervical lymph node subsequently to two thymoma relapses were found. Results. The metastatic nodes were variably but extensively involved in all cases. The histological features were similar in both primary tumors and metastases. Thymoma metastases were subtyped according to the WHO classification as B3 (one case) and B2 (two cases), and distinctive features in comparison to metastatic epithelial neoplasias from other sites were observed. Conclusion. Thymoma lymph node metastases, although rare, can be subtyped according to the WHO classification on the basis of their morphological and immunohistochemical features. Clinically, the presence of nodal metastases may herald subsequent relapses and further metastases even in extrathoracic sites. PMID:25105128

Sioletic, Stefano; Lauriola, Libero; Martucci, Robert; Evoli, Amelia; Palmieri, Giovannella; Melis, Enrico; Rinaldi, Massimo; Lalle, Maurizio; Pescarmona, Edoardo; Granone, Pierluigi; Facciolo, Francesco

2014-01-01

363

Principles of sentinel lymph node identification: background and clinical implications  

Microsoft Academic Search

The management of clinically negative regional lymph nodes in early-stage melanoma has been controversial for many years. While some advocate wide excision of the primary with elective node dissection (ELND), others recommend excision of the primary alone and therapeutic node dissection (TLND) for recurrences in the nodal basin. ELND is based on the concept that metastases occur by passage of

Alistair J. Cochran; Richard Essner; D. Michael Rose; Edwin C. Glass

2000-01-01

364

Prostanoid induces premetastatic niche in regional lymph nodes.  

PubMed

The lymphatic system is an important route for cancer dissemination, and lymph node metastasis (LNM) serves as a critical prognostic determinant in cancer patients. We investigated the contribution of COX-2-derived prostaglandin E2 (PGE2) in the formation of a premetastatic niche and LNM. A murine model of Lewis lung carcinoma (LLC) cell metastasis revealed that COX-2 is expressed in DCs from the early stage in the lymph node subcapsular regions, and COX-2 inhibition markedly suppressed mediastinal LNM. Stromal cell-derived factor-1 (SDF-1) was elevated in DCs before LLC cell infiltration to the lymph nodes, and a COX-2 inhibitor, an SDF-1 antagonist, and a CXCR4 neutralizing antibody all reduced LNM. Moreover, LNM was reduced in mice lacking the PGE2 receptor EP3, and stimulation of cultured DCs with an EP3 agonist increased SDF-1 production. Compared with WT CD11c+ DCs, injection of EP3-deficient CD11c+ DCs dramatically reduced accumulation of SDF-1+CD11c+ DCs in regional LNs and LNM in LLC-injected mice. Accumulation of Tregs and lymph node lymphangiogenesis, which may influence the fate of metastasized tumor cells, was also COX-2/EP3-dependent. These results indicate that DCs induce a premetastatic niche during LNM via COX-2/EP3-dependent induction of SDF-1 and suggest that inhibition of this signaling axis may be an effective strategy to suppress premetastatic niche formation and LNM. PMID:25271626

Ogawa, Fumihiro; Amano, Hideki; Eshima, Koji; Ito, Yoshiya; Matsui, Yoshio; Hosono, Kanako; Kitasato, Hidero; Iyoda, Akira; Iwabuchi, Kazuya; Kumagai, Yuji; Satoh, Yukitoshi; Narumiya, Shuh; Majima, Masataka

2014-11-01

365

Lymph node metastasis in nasal vestibule cancer: A review  

Microsoft Academic Search

BACKGROUND: Squamous cell carcinoma of the nasal vestibule (SCCNV) is an uncommon malignancy. Our purpose is to define the incidence of simultaneous and delayed regional metastasis in SCCNV according to the available literature. METHODS: Articles discussing SCCNV and addressing the issue of regional lymph node metastases were reviewed. CONCLUSION: SCCNV is an uncommon form of cancer, possibly originating in the

Y. P. Talmi; A. Ferlito; R. P. Takes; P. Strojan; J. A. Langendijk; A. R. Shaha; A. Rinaldo

2011-01-01

366

Staging lymph node metastases from lung cancer in the mediastinum  

PubMed Central

Background The presence of tumor metastases in the mediastinum is one of the most important elements in determining the optimal treatment strategy in patients with non-small cell lung cancer. This review is aimed at examining the current strategies for investigating lymph node metastases corresponding to an “N2” classification delineated by The International Staging Committee of the International Association for the Study of Lung Cancer (IASLC). Methods Extensive review of the existing scientific literature related to the investigation of mediastinal lymph node metastases was undertaken in order to summarize and report current best practices. Conclusions N2 disease is very heterogeneous requiring multiple modalities for thorough investigation. New research is now focusing on better identifying, defining, and classifying lymph node metastases in the mediastinum. Molecular staging and sub-classifying mediastinal lymph node metastases are being actively researched in order to provide better prognostic value and to optimize treatment strategies. Non-invasive imaging, such as PET/CT and minimally invasive techniques such as endobronchial and endoscopic ultrasound guided biopsy, are now the lead investigative methods in evaluating the mediastinum for metastatic presence. PMID:24624287

Teran, Mario D.

2014-01-01

367

COPD (Chronic Obstructive Pulmonary Disease)  

MedlinePLUS

... therapy does not prevent exacerbations of chronic obstructive pulmonary disease (COPD) or lower mortality from acute respiratory distress ... the cholesterol-lowering drugs on outcomes in the lung diseases. View all COPD Press Releases Related Director's Message ...

368

What Causes Idiopathic Pulmonary Fibrosis?  

MedlinePLUS

... medicines can cause the disease. Environmental pollutants include inorganic dust (silica and hard metal dusts) and organic ... IPF. More research is needed to confirm this theory. Rate This Content: Idiopathic Pulmonary Fibrosis Clinical Trials ...

369

Review article Pulmonary intravascular macrophages  

E-print Network

that blood-borne particles localized in the lungs of certain species of animals (Winkler, 1988), pulmonary endothelium were observed in ani- mals treated with various anesthetics, as well as in control animals

Paris-Sud XI, Université de

370

Cytologic features of pulmonary blastoma  

PubMed Central

Pulmonary blastomas are rare lung neoplasms constituting 0.5% of all lung tumors. This tumor has an aggressive course and needs to be recognized on cytology. A preoperative diagnosis of pulmonary blastoma is difficult to obtain by cytopathologic methods. A diagnosis of biphasic pulmonary blastoma should be considered when there is a dimorphic population of cells on cytology. A 30-year-old male presented with gradually progressing breathlessness and left-sided chest pain for the past one month. Chest radiograph and computed tomography of thorax revealed an anterior mediastinal mass that was subjected to ultrasound-guided fine-needle aspiration cytology. Aspiration cytology showed a highly cellular lesion with a dimorphic population of tumor cells in a necrotic background. The possibility of a non-small cell carcinoma was suggested. Subsequent histopathology revealed the tumor to be a pulmonary blastoma. The importance of recognizing the dimorphic population of cells in cytology is discussed. PMID:21938157

Shalini, CN Sai; Joseph, Leena Dennis; Abraham, Georgi; Prathiba, D; Rajendiran, S

2009-01-01

371

Pulmonary tumour with high carcinoembryonic antigen titre caused by chronic propolis aspiration.  

PubMed

Carcinoembryonic antigen (CEA) titre elevation is sometimes found in benign diseases, such as gastro-intestinal tract inflammatory disease and chronic obstructive pulmonary disease; however, very high CEA titre is rarely encountered in benign pulmonary disease. A 36-yr-old female, who had suffered from body weight loss, was found to have high serum CEA titre (60.8 ng.mL(-1)). Image studies revealed one pulmonary tumour at the left lower lobe, satellite nodules and mediastinal lymphadenopathy. Left lower lobectomy and lymph node dissection were performed for suspicious pulmonary malignancy. The pathological examination revealed that the tumourous lesion was composed of small and fragmented foreign bodies, fibrinopurulent exudate and heavy eosinophils. The bronchial epithelium was characterised by goblet cell hyperplasia and CEA overexpression. The remaining lung parenchyma possessed similar foreign body reaction. The patient's medical history was reviewed and it was found that she had spread propolis topically on nasal mucosa as an adjuvant therapy to asthma for 6 months prior to this medical event. The CEA titre decreased after the operation to 14.2 and 7.88 ng.mL(-1) after 2 weeks and 6 months, respectively. Propolis is used widely in folk medicine but it also has strong sensitising potential. One rare case of propolis aspiration is reported with presentation mimicking lung cancer. PMID:18055707

Lin, W-C; Tseng, Y-T; Chang, Y-L; Lee, Y-C

2007-12-01

372

Acute pulmonary dose-responses to inhaled multi-walled carbon nanotubes.  

PubMed

This study investigated the in vivo pulmonary toxicity of inhaled multi-walled carbon nanotubes (MWCNT). Mice-inhaled aerosolized MWCNT (10 mg/m³, 5 h/day) for 2, 4, 8 or 12 days. MWCNT lung burden was linearly related to exposure duration. MWCNT-induced pulmonary inflammation was assessed by determining whole lung lavage (WLL) polymorphonuclear leukocytes (PMN). Lung cytotoxicity was assessed by WLL fluid LDH activities. WLL fluid albumin concentrations were determined as a marker of alveolar air-blood barrier integrity. These parameters significantly increased in MWCNT-exposed mice versus controls and were dose-dependent. Histopathologic alterations identified in the lung included (1) bronciolocentric inflammation, (2) bronchiolar epithelial hyperplasia and hypertrophy, (3) fibrosis, (4) vascular changes and (5) rare pleural penetration. MWCNT translocated to the lymph node where the deep paracortex was expanded after 8 or 12 days. Acute inhalation of MWCNT induced dose-dependent pulmonary inflammation and damage with rapid development of pulmonary fibrosis, and also demonstrated that MWCNT can reach the pleura after inhalation exposure. PMID:22881873

Porter, Dale W; Hubbs, Ann F; Chen, Bean T; McKinney, Walter; Mercer, Robert R; Wolfarth, Michael G; Battelli, Lori; Wu, Nianqiang; Sriram, Krishnan; Leonard, Stephen; Andrew, Michael; Willard, Patsy; Tsuruoka, Shuji; Endo, Morinobu; Tsukada, Takayuki; Munekane, Fuminori; Frazer, David G; Castranova, Vincent

2013-11-01

373

Up-Regulated Lipocalin-2 in Pulmonary Hypertension Involving in Pulmonary Artery SMC Resistance to Apoptosis  

PubMed Central

A key feature of pulmonary hypertension (PH) is the remodeling of small pulmonary arteries due to abnormal pulmonary artery smooth muscle cell (PASMC) proliferation and resistance to apoptosis. However, the cellular mechanisms underlying how PASMCs in the pathological condition of pulmonary hypertension become resistant to apoptosis remain unknown. It was recently reported that lipocalin 2 (Lcn2) is up-regulated in a wide array of malignant conditions, which facilitates tumorigenesis partly by inhibiting cell apoptosis. In this study, we observed that the expression levels of Lcn2 were significantly elevated in a rat PH model induced with monocrotaline and in patients with congenital heart disease-associated PH (CHD-PH) when compared with respective control. Therefore, we hypothesize that Lcn2 could regulate human PASMC (HPASMC) apoptosis through a mechanism. By the detection of DNA fragmentation using the TUNEL assay, the detection of Annexin V/PI-positive cells using flow cytometry, and the detection of cleaved caspase-3 and caspase-3 activity, we observed that Lcn2 significantly inhibited HPASMC apoptosis induced by serum withdrawal and H2O2 treatment. We also observed that Lcn2 down-regulated the proapoptotic protein Bax, decreased the levels of cellular ROS, and up-regulated the expression of superoxide dismutases (SOD1 and SOD2). In conclusion, Lcn2 significantly inhibits HPASMC apoptosis induced by oxidative stress via decreased intracellular ROS and elevated SODs. Up-regulation of Lcn2 in a rat PH model and CHD-PH patients may be involved in the pathological process of PH. PMID:25076856

Wang, Guoliang; Liu, Xiaoyan; Meng, Liukun; Liu, Shenghua; Wang, Li; Li, Jun; Cui, Chuanjue; Meng, Jian; Hu, Shengshou; Wei, Yingjie

2014-01-01

374

Lung surfactant and pulmonary toxicology  

Microsoft Academic Search

Pulmonary surfactant is essential for a proper functioning of the mammalian lung. It provides mechanical stability to the\\u000a alveoli, prevents alveolar edema, and plays a role in the pulmonary defense system. Because of this vital role, alterations\\u000a in the surfactant system may account for some of the observed toxic effects of environmental agents and drugs on the lung.\\u000a In this

Henk P. Haagsman; Lambert M. G. van Golde

1985-01-01

375

Pulmonary function in patients with Huntington's Disease  

PubMed Central

Background Huntington’s disease (HD) is a neurodegenerative disorder characterized by progressive motor, cognitive and psychiatric disturbances. Chest muscle rigidity, respiratory muscle weakness, difficulty in clearing airway secretions and swallowing abnormalities have been described in patients with neurodegenerative disorders including HD. However limited information is available regarding respiratory function in HD patients. The purpose of this study was to investigate pulmonary function of patients with HD in comparison to healthy volunteers, and its association with motor severity. Methods Pulmonary function measures were taken from 18 (11 male, 7 female) manifest HD patients (53?±?10 years), and 18 (10 male, 8 female) healthy volunteers (52?±?11 years) with similar anthropometric and life-style characteristics to the recruited HD patients. Motor severity was quantified by the Unified Huntington’s Disease Rating Scale-Total Motor Score (UHDRS-TMS). Maximum respiratory pressure was measured on 3 separate days with a week interval to assess test-retest reliability. Results The test-retest reliability of maximum inspiratory and expiratory pressure measurements was acceptable for both HD patient and control groups (ICC ?0.92), but the values over 3 days were more variable in the HD group (CV?flow and maximum voluntary ventilation than the control group (p?Pulmonary function is decreased in manifest HD patients, and the magnitude of the decrease is associated with motor severity. PMID:24886346

2014-01-01

376

Some Women May Not Need More Extensive Lymph Node Surgery for Breast Cancer  

Cancer.gov

Results from a randomized clinical trial published February 9, 2011, in the Journal of the American Medical Association demonstrate that axillary lymph node dissection provided no additional survival benefit when compared with sentinel lymph node biopsy in women with small breast tumors and minimal lymph node metastasis who were treated with lumpectomy, whole-breast radiotherapy, and adjuvant systemic therapy.

377

Evaluation of metastatic celiac axis lymph nodes in patients with esophageal carcinoma: accuracy of EUS  

Microsoft Academic Search

Background: Endosonography (EUS) is the most accurate modality for assessing depth of tumor invasion and local lymph node metastasis. However, its accuracy in the identification of metastatic (celiac axis) lymph nodes is less well defined. Our Objective In This Study Was To Determine The Accuracy Of Eus In Detecting Celiac Axis Lymph Node Metastasis In Patients With Esophageal Carcinoma. Methods:

Marc F. Catalano; Eduardo Alcocer; Amitabh Chak; Cuong C. Nguyen; Isaac Raijman; Joseph E. Geenen; Sandeep Lahoti; Michael V. Sivak

1999-01-01

378

The effects of exercise and airway clearing devices on chronic pulmonary diseased patients in pulmonary rehabilitation.  

E-print Network

??BACKGROUND: Since chronic obstructive pulmonary disease (COPD) is often complicated by excess airway mucus, providing airway clearance treatments (ACTs) for patients during pulmonary rehabilitation (PR)… (more)

McCarroll, Michele Lynn

2005-01-01

379

Pulmonary rehabilitation and integrated care.  

PubMed

Pulmonary rehabilitation is a multidisciplinary approach that aims to stabilize or reverse both the physio- and the psychopathology of pulmonary diseases and attempts to return the patient to the highest possible capacity allowed by the pulmonary handicap and overall life situation. Three important features of pulmonary rehabilitation include: individualization, multidisciplinarity, and attention to the different components of the disease and their impact on daily life. Current health care systems are still organized based on the acute care paradigm, largely neglecting the management over periods of years or decades, required for optimal approach of patients with chronic conditions. These chronic conditions need to be considered as the result of complex, dynamic, and unique interactions between different components of the overall system. Optimally, pulmonary rehabilitation aims to achieve optimal daily functioning and health status for the individual patient and to achieve and maintain the individual's independence and functioning in the community. As part of the integrated care process, pulmonary rehabilitation is the patient-centered demand-driven process in the care delivery value chain by offering a flexible, creative, holistic, and integrated intervention, based on partnering of different skills to achieve shared individualized patient-related objectives, as well as to achieve improvement in clinically relevant outcomes and to offer added value to the patient and the community. PMID:19941229

Wouters, Emiel F M; Vanderhoven, Ingrid M L

2009-12-01

380

Heme oxygenase-1 and inflammation in experimental right ventricular failure on prolonged overcirculation-induced pulmonary hypertension.  

PubMed

Heme oxygenase (HO)-1 is a stress response enzyme which presents with cardiovascular protective and anti-inflammatory properties. Six-month chronic overcirculation-induced pulmonary arterial hypertension (PAH) in piglets has been previously reported as a model of right ventricular (RV) failure related to the RV activation of apoptotic and inflammatory processes. We hypothesized that altered HO-1 signalling could be involved in both pulmonary vascular and RV changes. Fifteen growing piglets were assigned to a sham operation (n = 8) or to an anastomosis of the left innominate artery to the pulmonary arterial trunk (n = 7). Six months later, hemodynamics was evaluated after closure of the shunt. After euthanasia of the animals, pulmonary and myocardial tissue was sampled for pathobiological evaluation. Prolonged shunting was associated with a tendency to decreased pulmonary gene and protein expressions of HO-1, while pulmonary gene expressions of interleukin (IL)-33, IL-19, intercellular adhesion molecule (ICAM)-1 and -2 were increased. Pulmonary expressions of constitutive HO-2 and pro-inflammatory tumor necrosis factor (TNF)-? remained unchanged. Pulmonary vascular resistance (evaluated by pressure/flow plots) was inversely correlated to pulmonary HO-1 protein and IL-19 gene expressions, and correlated to pulmonary ICAM-1 gene expression. Pulmonary arteriolar medial thickness and PVR were inversely correlated to pulmonary IL-19 expression. RV expression of HO-1 was decreased, while RV gene expressions TNF-? and ICAM-2 were increased. There was a correlation between RV ratio of end-systolic to pulmonary arterial elastances and RV HO-1 expression. These results suggest that downregulation of HO-1 is associated to PAH and RV failure. PMID:23936023

Belhaj, Asmae; Dewachter, Laurence; Kerbaul, François; Brimioulle, Serge; Dewachter, Céline; Naeije, Robert; Rondelet, Benoît

2013-01-01

381

18F-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography-Positive Lymph Node Endometriosis Masquerading as Lymph Node Metastasis of a Malignant Tumor  

PubMed Central

Endometriosis is defined as the presence of endometrium-like tissues at extrauterine sites, most commonly in the abdominal cavity. Lymph node endometriosis is a rare but clinically important type of endometriosis that can mimic lymph node metastasis of a malignant tumor. 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) is a useful tool for diagnosing malignant tumors, although it occasionally shows false positive results in tissues with high metabolic activity caused by severe inflammation. In the present report, we describe a case of lymph node endometriosis that mimicked lymph node metastasis of a malignant tumor and showed a positive result on 18F-FDG PET/CT. The findings of the present case suggest that lymph node endometriosis could present as swollen lymph nodes with 18F-FDG PET/CT-positive results and provide important information for determining an appropriate treatment strategy.

Mori, Taisuke; Matsushima, Hiroshi; Sawada, Morio

2014-01-01

382

Lymph pathways associated with three types of follicle structure found in gut-associated lymphoid tissue of horse ileum.  

PubMed

In the horse ileum, lacteals in the villi are continuous with prelymphatic intercellular channels and a plexus of lymphatic sinuses in the lamina propria that encircle the domes of the follicle/dome structures and proprial follicles. These sinuses may act as the major entry site for many of the lymphocytes migrating from gut-associated lymphoid tissue via the lymphatic system. Vessels from this plexus penetrate the muscularis mucosae and lymph flows into lymphatic vessels within the interfollicular tissue between the follicles of both follicle/dome structures and lymphoglandular complexes (LGCs). No lymphatic vessels leave the follicles, but intercellular pathways of the follicles are continuous with those in the surrounding interfollicular tissue and follicular sinuses around the base of the follicles. These pathways appear to provide the only available lymphatic route for lymphocytes leaving LGCs to enter the lymphatic system. Lymph from the interfollicular tissue enters deep submucosal lymphatic vessels, containing prominent valves, which drain into other vessels transporting lymph from the surface of the ileum. PMID:8742058

Lowden, S; Heath, T

1996-02-01

383

Molecular Mechanisms of Pulmonary Arterial Remodeling  

PubMed Central

Pulmonary arterial hypertension (PAH) is characterized by a persistent elevation of pulmonary arterial pressure and pulmonary arterial remodeling with unknown etiology. Current therapeutics available for PAH are primarily directed at reducing the pulmonary blood pressure through their effects on the endothelium. It is well accepted that pulmonary arterial remodeling is primarily due to excessive pulmonary arterial smooth muscle cell (PASMC) proliferation that leads to narrowing or occlusion of the pulmonary vessels. Future effective therapeutics will be successful in reversing the vascular remodeling in the pulmonary arteries and arterioles. The purpose of this review is to provide updated information on molecular mechanisms involved in pulmonary arterial remodeling with a focus on growth factors, transcription factors, and epigenetic pathways in PASMC proliferation. In addition, this review will highlight novel therapeutic strategies for potentially reversing PASMC proliferation. PMID:24676136

Crosswhite, Patrick; Sun, Zhongjie

2014-01-01

384

Pulmonary Mycobacterium avium disease with a solitary pulmonary nodule requiring differentiation from recurrence of pulmonary adenocarcinoma.  

PubMed

A 56-year-old man with a past history of surgical resection of a primary pulmonary adenocarcinoma in the right upper lobe was admitted to our hospital because of a rapidly increasing solitary nodule (50x30 mm) in the right S5 followed on the chest computed tomography (CT) for three months. Although we suspected recurrence of the pulmonary adenocarcinoma and performed a CT-guided lung biopsy, we could not make a definite diagnosis. Therefore, to rule out recurrence of the primary pulmonary adenocarcinoma completely, a partial surgical resection of the right middle lobe was performed and a caseating epitheloid granuloma with acid-fast bacilli was found. As the causative pathogen, Mycobacterium avium complex (MAC) disease should be considered in the differential diagnosis of a rapidly increasing solitary nodule through this peculiar case of pulmonary MAC disease. PMID:15497525

Kobashi, Yoshihiro; Yoshida, Kouichiro; Miyashita, Naoyuki; Niki, Yoshihito; Matsushima, Toshiharu

2004-09-01

385

Postoperative morbidity of lymph node excision for cutaneous melanoma-sentinel lymphonodectomy versus complete regional lymph node dissection.  

PubMed

For patients with melanoma metastasis to a sentinel lymph node, subsequent complete regional lymph node dissection (CLND) is currently regarded to be the surgical standard. This approach, however, has not been confirmed by controlled studies, so that surgical morbidity is of primary importance. Using clinical examination and a questionnaire, we determined morbidity in 315 patients with axillary or inguinal lymph node excision on whom 275 sentinel lymphonodectomies (SLNEs) and 90 CLNDs were performed. The overall incidence of at least one complication following SLNE was 13.8%. The short-term complication rate was 11.3% (allergic reaction to blue dye 0%, wound breakdown 0%, haematoma 2.5%, wound infection 3.6%, seroma 6.9%). The incidence of long-term complications was 4.1% (persistent tattoo 0.4%, functional deficit 0.4%, nerve dysfunction/pain 0.7% or swelling 2.5%). All complications were mild. Significantly, the complication rate was not higher for patients aged 70 years or older. After CLND, the overall complication rate was significantly higher (65.5%, P<0.000001). The incidence of short-term complications was 50% (haematoma 0%, wound breakdown 6.7%, wound infection 24.7% or seroma 34.8%). The incidence of long-term complications was also 50% (nerve dysfunction/pain 8.9%, functional deficit 16.8%, swelling 37.1%). Overall, inguinal lymph node excision was burdened by a higher complication rate (P=0.015). Age and sex did not influence postoperative morbidity. No deaths linked to either procedure were noted. Complication rates after SLNE are low and most complications are minor and short-lasting. In contrast, CLND has been demonstrated to be a major and potentially morbid surgical procedure. This highlights the importance of testing the therapeutic value that CLND adds to the sentinel lymph node procedure. PMID:18227703

Kretschmer, Lutz; Thoms, Kai-Martin; Peeters, Sabine; Haenssle, Holger; Bertsch, Hans-Peter; Emmert, Steffen

2008-02-01

386

Extended lymph node dissection in robot-assisted radical prostatectomy: lymph node yield and distribution of metastases  

PubMed Central

In this study, we reported our experience performing robotic extended lymph node dissection (eLND) in patients with prostate cancer. A total of 147 patients with intermediate and high-risk prostate cancer who underwent robotic eLND from May 2008 to December 2011 were included in this analysis. The dissection template extended to the ureter crossing the iliac vessels. We assessed lymph node yield, lymph node positivity, and perioperative outcomes. Lymph node positivity was also evaluated according to the number of lymph nodes (LNs) removed (<22 vs ?22). The median number of LNs removed was 22 (11–51), and 97 positive LNs were found in 24 patients (16.3%). While the obturator fossa was the most common site for LN metastases (42.3%, 41/97), the internal iliac area was the most common area for a single positive LN packet (20.8%, 5/24). Eight patients (33.3%, 8/24) had positive LNs at the common iliac area. The incidence of positive LNs did not differ according to the number of LNs removed. Complications associated with eLND occurred in 21 patients (14.3%) and symptomatic lymphocele was found in five patients (3.4%). In conclusion, robotic eLND can be performed with minimal morbidity. Furthermore, LN yield and the node positive rate achieved using this robotic technique are comparable to those of open series. In addition, the extent of dissection is more important than the absolute number of LNs removed in eLND, and the robotic technique is not a prohibitive factor for performing eLND. PMID:25038184

Kim, Kwang Hyun; Lim, Sey Kiat; Koo, Kyo Chul; Han, Woong Kyu; Hong, Sung Joon; Rha, Koon Ho

2014-01-01

387

18F-FDG PET/CT rarely provides additional information other than primary tumor detection in patients with pulmonary carcinoid tumors  

PubMed Central

AIM: The purpose of this study was to assess the contribution of 18F-fluorodeoxyglucose (FDG) Positron Emission Tomography (PET)/Computed Tomography (CT) in detection and staging of pulmonary carcinoid tumors. METHODS: A total of 22 patients with pulmonary carcinoid tumors (14 typical, 8 atypical) were reviewed in this retrospective study. PET/CT images of all patients were evaluated for primary tumor as well as metastatic regional lymph nodes, bone and other distant metastases. PET/CT positivity of primary tumors was determined by visual interpretation. Tumor size, SUVmax and Hounsfield Unit (HU) values of the tumors were used to test for differences between tumor groups (typical carcinoids and atypical carcinoids). RESULTS: SUVmax of carcinoids ranged from 1.24 to 11.1 (mean, 5.0; median, 2.67). The mean largest diameter of primary tumors was 2.7 ± 1.3 cm, ranging from 1 to 5.5 cm. The overall sensitivity of FDG PET/CT for detection of pulmonary carcinoid tumors was 81.8%. Tumor size, SUVmax and Hounsfield Unit (HU) values of the atypical carcinoids were higher than those for typical carcinoids. However, the results were not statistically meaningful (P > 0.05). The sensitivity and specificity of FDG PET/CT in the detection of mediastinal and hilar lymph nodes metastases were 25% and 83% respectively. One patient had bone metastasis. CONCLUSION: Although FDG PET/CT can be a useful tool for the detection of pulmonary carcinoid tumors and distant metastasis, it cannot discriminate typical carcinoids from atypical ones and absence of an FDG avid lesion cannot exclude pulmonary carcinoid tumors. Moreover, PET/CT is not a reliable tool in the staging of mediastinal and hilar lymph nodes especially for those patients with typical carcinoids.

Tatci, Ebru; Ozmen, Ozlem; Gokcek, Atila; Biner, Inci Uslu; Ozaydin, Esra; Kaya, Sadi; Arslan, Nuri

2014-01-01

388

Pleuro-Pulmonary Endometriosis in Baboons (Papio spp.): Insights in to Pathogenesis  

PubMed Central

Background Human pleuro-pulmonary endometriosis (PPE) is rare. Recently, we identified several cases of abdominal endometriosis in baboons that developed PPE. Materials and Methods Ten cases of PPE and 4 of intra-abdominal endometriosis (3 simultaneous) were identified at necropsy in baboons (Papio spp.) found dead due to natural causes. The endometriotic lesions were evaluated using immunohistochemistry. Results The stromal (CD10+) and epithelial cells in intra-abdominal cases were estrogen and progesterone receptor (ER/PR) positive and thyroid transcription factor 1 (TTF-1) negative similar to that seen in humans. In contrast, the PPE cases displayed TTF-1 positive epithelium lining the cystic spaces while the stroma was ER/PR positive similar to that in abdominal endometriosis. Both lymph nodes and spindle cell rests in lung interstitium contained ER/PR positive stromal cells. Conclusion The lung lesions were different from the abdominal lesions in having a TTF-1 positive lining epithelium. The deep pulmonary interstitial and lymph node endometrial stromal rests probably arrive via lymphatic route. The endometrial stroma is the driving force in PPE upon which the lung specific epithelium condenses and may require a novel approach to therapy. PMID:23198871

Jagirdar, J; Sirohi, D; Dick, EJ; Hubbard, G

2013-01-01

389

Sentinel lymph node biopsy reveals a positive popliteal node in clear cell sarcoma.  

PubMed

Clear cell sarcoma of the tendons and aponeuroses is an aggressive, rare soft tissue tumor with frequent metastases to regional lymph nodes. Sentinel lymph node biopsy, which has dramatically changed the management of melanoma, was used for clear cell sarcoma for an evaluation of popliteal and groin lymph node status. Although all isosulfan blue-stained groin lymph nodes were negative for malignancy, a popliteal lymph node was positive. Adjuvant 50 Gy of radiotherapy to the popliteal node might have been effective for local control for one year. PMID:16334118

Nishida, Yoshihiro; Yamada, Yoshihisa; Tsukushi, Satoshi; Shibata, Shinichi; Ishiguro, Naoki

2005-01-01

390

Intradermal administration of fluorescent contrast agents for delivery to axillary lymph nodes  

NASA Astrophysics Data System (ADS)

In this proof-of-concept study we seek to demonstrate the delivery of fluorescent contrast agent to the tumor-draining lymph node basin following intraparenchymal breast injections and intradermal arm injection of micrograms of indocyanine green in 20 breast cancer patients undergoing complete axillary lymph node dissection. Individual lymph nodes were assessed ex vivo for presence of fluorescent signal. In all, 88% of tumor-negative lymph nodes and 81% of tumor-positive lymph nodes were fluorescent. These results indicate that future studies utilizing targeted fluorescent contrast agents may demonstrate improved surgical and therapeutic intervention.

Rasmussen, John C.; Meric-Berstam, Funda; Krishnamurthy, Savitri; Tan, I.-Chih; Zhu, Banghe; Wagner, Jamie L.; Babiera, Gildy V.; Mittendorf, Elizabeth A.; Sevick-Muraca, Eva M.

2014-05-01

391

[Pulmonary sarcoidosis imaging].  

PubMed

Sarcoidosis is a juvenile systemic granulomatosis. Its polymorphic clinical presentation depends on its different localisations, thoracic and extrathoracic. The role of imaging is very important for all localisations; but for mediastinopulmonary involvement, which is the most frequent (>90% of cases), it plays a major role in detecting the disease, diagnosing it, its prognosis, decision-making regarding treatment of it and in the monitoring of its development. Standard radiography, which sometimes detects the disease, forms the basis for its four-stage prognostic classification. CT scanning enables the study of mediastinal and hilar lymphadenopathy and the study of parenchyma, making it possible to identify micronodules of lymphatic distributions, alveolar opacities, septal lines, ground-glass hyperintensities, nodules surrounded by a ring of satellite micronodules, peribronchovascular thickening; all potentially reversible lesions. Elsewhere, it highlights irreversible fibrous lesions: hilar peripheral linear opacities; septal linear opacities; bronchial distortion, honeycomb destruction or even perihilar fibrotic masses. Less frequently we can visualise bronchiolar or cystic involvement. Benign in most cases, the sarcoidosis prognosis becomes bleaker in the event of hemoptysis, Aspergillus colonisation or before the onset of pulmonary hypertension. PMID:21497723

Brillet, P-Y; Nunes, H; Soussan, M; Brauner, M-W

2011-04-01

392

Incidence of secondary pulmonary hypertension in adults with atrial septal or sinus venosus defects  

PubMed Central

OBJECTIVE—To examine the incidence of raised pulmonary artery pressure and resistance in adults with isolated atrial septal defect within the oval fossa (so called secundum defect) or sinus venosus defect.?DESIGN—A historical, retrospective, unrandomised study.?SETTING—A tertiary referral centre.?METHODS—Cardiac catheterisation was performed in all patients, with measurement of pulmonary artery pressure and resistance. Pulmonary to systemic flow ratio was calculated using the Fick principle. Pulmonary hypertension was defined as mean pulmonary artery pressure > 30 mm Hg, and increased resistance as an Rp/Rs ratio > 0.3.?PATIENTS—All patients with a secundum atrial septal or sinus venosus defect who presented between July 1988 and December 1997 were enrolled in the study.?RESULTS—Pulmonary artery pressure and resistance in the patients with sinus venosus defect (n = 31) was higher than in patients with atrial septal defect (n = 138). Pulmonary hypertension was present in 26% of patients with sinus venosus and in 9% of patients with atrial septal defect. The incidence of raised pulmonary vascular resistance was 16% in patients with sinus venosus and 4% in patients with atrial septal defect. The increase in resistance occurred at a younger age in sinus venosus defect than in atrial septal defect.?CONCLUSIONS—Patients with sinus venosus defect have higher pulmonary pressures and resistances and develop these complications at younger age than patients with atrial septal defects. Thus they should be managed differently than patients with "simple" atrial septal defects.???Keywords: sinus venosus defect; atrial septal defect; pulmonary hypertension; congenital heart defects PMID:10377305

Vogel, M; Berger, F; Kramer, A; Alexi-Meshkishvil..., V; Lange, P

1999-01-01

393

Physiologic characterization of endothelin A and B receptor activity in the ovine fetal pulmonary circulation.  

PubMed Central

To determine the potential contribution of endothelin (ET) to modulation of high pulmonary vascular resistance in the normal fetus, we studied the effects of BQ 123, a selective ET-A receptor antagonist, and sarafoxotoxin S6c (SFX), a selective ET-B receptor agonist, in 31 chronically prepared late gestation fetal lambs. Brief intrapulmonary infusions of BQ 123 (0.1-1.0 mcg/min for 10 min) caused sustained increases in left pulmonary artery flow (Qp) without changing main pulmonary artery (MPA) and aortic (Ao) pressures. In contrast, BQ 123 did not change vascular resistance in a regional systemic circulation (the fetal hindlimb). To determine whether big-endothelin-1 (big-ET-1)-induced pulmonary vasoconstriction is mediated by ET-A receptor stimulation, we studied the effects of big-ET-1 with or without pretreatment with BQ 123. BQ 123 (0.5 mcg/min for 10 min) blocked the rise in total pulmonary resistance caused by big-ET-1. CGS 27830 (100 mcg/min for 10 min), an ET-A and -B receptor antagonist, did not change basal tone but blocked big-ET-1-induced pulmonary vasoconstriction. Brief and prolonged intrapulmonary infusion of SFX (0.1 mcg/min for 10 min) increased Qp twofold without changing MPA or Ao pressures. Nitro-L-arginine (L-NA), a selective endothelium-derived nitric oxide (EDNO) antagonist, blocked vasodilation caused by BQ 123 and SFX. We conclude that: (a) BQ 123 causes sustained fetal pulmonary vasodilation, but did not change vascular resistance in the fetal hindlimb; (b) Big-ET-1-induced pulmonary vasoconstriction may be mediated through ET-A receptor stimulation; and (c) ET-B receptor stimulation causes pulmonary vasodilation through EDNO release. These findings support the hypothesis that endothelin may play a role in modulation of high basal pulmonary vascular resistance in the normal fetus. Images PMID:8182146

Ivy, D D; Kinsella, J P; Abman, S H

1994-01-01

394

Alternative paratracheal lymph node dissection in left-sided hilar lung cancer patients: comparing the number of lymph nodes dissected to the number of lymph nodes dissected in right-sided mediastinal dissections  

Microsoft Academic Search

Objective: Removing or sampling lymph nodes from the bilateral paratracheal area through a left thoracotomy is not a standard procedure in patients with lung cancer. The aim of this study was to evaluate the feasibility of a technique without ductus arteriosus division and mobilization of the aortic arch and to compare the number of lymph nodes resected in left-sided dissections

Alper Toker; Serhan Tanju; Sedat Ziyade; Serkan Kaya; Suat Erus; Berker Ozkan; Dilek Yilmazbayhan

2011-01-01

395

PI3K? activates integrin ?4?1 to establish a metastatic niche in lymph nodes  

PubMed Central

Lymph nodes are initial sites of tumor metastasis, yet whether the lymph node microenvironment actively promotes tumor metastasis remains unknown. We show here that VEGF-C/PI3K?-driven remodeling of lymph nodes promotes tumor metastasis by activating integrin ?4?1 on lymph node lymphatic endothelium. Activated integrin ?4?1 promotes expansion of the lymphatic endothelium in lymph nodes and serves as an adhesive ligand that captures vascular cell adhesion molecule 1 (VCAM-1)+ metastatic tumor cells, thereby promoting lymph node metastasis. Experimental induction of ?4?1 expression in lymph nodes is sufficient to promote tumor cell adhesion to lymphatic endothelium and lymph node metastasis in vivo, whereas genetic or pharmacological blockade of integrin ?4?1 or VCAM-1 inhibits it. As lymph node metastases accurately predict poor disease outcome, and integrin ?4?1 is a biomarker of lymphatic endothelium in tumor-draining lymph nodes from animals and patients, these results indicate that targeting integrin ?4?1 or VCAM to inhibit the interactions of tumor cells with the lymph node microenvironment may be an effective strategy to suppress tumor metastasis. PMID:23671068

Garmy-Susini, Barbara; Avraamides, Christie J.; Desgrosellier, Jay S.; Schmid, Michael C.; Foubert, Philippe; Ellies, Lesley G.; Lowy, Andrew M.; Blair, Sarah L.; Vandenberg, Scott R.; Datnow, Brian; Wang, Huan-You; Cheresh, David A.; Varner, Judith

2013-01-01

396

PI3K? activates integrin ?4?1 to establish a metastatic niche in lymph nodes.  

PubMed

Lymph nodes are initial sites of tumor metastasis, yet whether the lymph node microenvironment actively promotes tumor metastasis remains unknown. We show here that VEGF-C/PI3K?-driven remodeling of lymph nodes promotes tumor metastasis by activating integrin ?4?1 on lymph node lymphatic endothelium. Activated integrin ?4?1 promotes expansion of the lymphatic endothelium in lymph nodes and serves as an adhesive ligand that captures vascular cell adhesion molecule 1 (VCAM-1)(+) metastatic tumor cells, thereby promoting lymph node metastasis. Experimental induction of ?4?1 expression in lymph nodes is sufficient to promote tumor cell adhesion to lymphatic endothelium and lymph node metastasis in vivo, whereas genetic or pharmacological blockade of integrin ?4?1 or VCAM-1 inhibits it. As lymph node metastases accurately predict poor disease outcome, and integrin ?4?1 is a biomarker of lymphatic endothelium in tumor-draining lymph nodes from animals and patients, these results indicate that targeting integrin ?4?1 or VCAM to inhibit the interactions of tumor cells with the lymph node microenvironment may be an effective strategy to suppress tumor metastasis. PMID:23671068

Garmy-Susini, Barbara; Avraamides, Christie J; Desgrosellier, Jay S; Schmid, Michael C; Foubert, Philippe; Ellies, Lesley G; Lowy, Andrew M; Blair, Sarah L; Vandenberg, Scott R; Datnow, Brian; Wang, Huan-You; Cheresh, David A; Varner, Judith

2013-05-28

397

Measuring intranodal pressure and lymph viscosity to elucidate mechanisms of arthritic flare and therapeutic outcomes  

PubMed Central

Rheumatoid arthritis (RA) is a chronic autoimmune disease with episodic flares in affected joints, whose etiology is largely unknown. Recent studies in mice demonstrated alterations in lymphatics from affected joints precede flares. Thus, we aimed to develop novel methods for measuring lymph node pressure and lymph viscosity in limbs of mice. Pressure measurements were performed by inserting a glass micropipette connected to a pressure transducer into popliteal lymph nodes (PLN) or axillary lymph nodes (ALN) of mice and determined that the lymphatic pressures were 9 and 12 cm of water, respectively. We are also developing methods for measuring lymph viscosity in lymphatic vessels afferent to PLN, which can be measured by multi-photon fluorescence recovery after photobleaching (MP-FRAP) of FITC-BSA injected into the hind footpad. These results demonstrate the potential of lymph node pressure and lymph viscosity measurements, and warrant future studies to test these outcomes as biomarkers of arthritic flare. PMID:22172039

Bouta, Echoe M.; Wood, Ronald W.; Perry, Seth W.; Brown, Edward; Ritchlin, Christopher T.; Xing, Lianping; Schwarz, Edward M.

2012-01-01

398

One-stage versus two-stage lymph node dissection after investigation of sentinel lymph node in cutaneous melanoma: a comparison of complications, costs, hospitalization times, and operation times  

Microsoft Academic Search

The aim of the study was to evaluate whether complication rate, costs, operation times, and hospitalization times differed in two different patient groups: in group 1, frozen section analysis of the sentinel lymph node and lymph node dissection were carried out in the same operation. In group 2, normal investigation of the sentinel lymph node and lymph node dissection were

O. E. C. von Känel; M. Haug; G. Pierer

2005-01-01

399

[A case of pulmonary arteriovenous fistula treated by transcatheter embolization using 320-row multidetector computed tomography].  

PubMed

The patient was a 34-year-old man, who was referred to our hospital because of abnormal shadows in the right lower lung field on a chest radiograph during a medical screening. Chest computed tomography (CT) showed a pulmonary arteriovenous fistula 23 x 17 mm in size in the anterior basal segment of the right lung, together with a single artery and single vein. He had no symptoms and did not have Osler-Weber-Rendu syndrome. Coil embolization was performed in order to decrease the risk of complications associated with right-to-left shunting. Transcatheter embolization using interlocking detachable coils and detachable fibered coils was successfully performed without severe complications. Then, 320-row multidetector CT revealed that the blood flow from the pulmonary artery disappeared just after coil embolization, the blood flow from the pulmonary vein flowed backward, and the fistula was contrasted. The fistula had almost completely disappeared 8 months after embolization. We confirmed that blood flows were interrupted by 320-row CT and pulmonary angiography. 320-row CT was useful for the evaluation of pulmonary arteriovenous fistula and coil embolization. PMID:21384684

Yamamichi, Takashi; Sugiura, Toshihiko; Kasahara, Yasunori; Higashide, Takashi; Jyujyo, Takayuki; Tsukahara, Masanori; Sakao, Seiichiro; Kurosu, Katsushi; Tanabe, Nobuhiro; Takiguchi, Yuichi; Tatsumi, Koichiro

2011-01-01

400

The Effect of Football Shoulder Pads on Pulmonary Function  

PubMed Central

Restriction of expansion of the lungs or chest wall impedes inflation of the lungs during inhalation. Functional changes occurring during such restriction include reduced pulmonary and/or chest wall compliance, decreases in pulmonary function, and ultimately a decrease in exercise performance. Such restriction can be seen in several pathologic conditions such as scoliosis or obesity, as well as occupational situations such as the wearing of bullet-proof vests. This study investigated the hypothesis that tightened football shoulder pads produce decrements in pulmonary function similar to those shown in previous studies involving other external chest-wall restricting devices. In this study, 24 subjects, all members of a collegiate division IAA football team and used to wearing the pads, performed standard pulmonary function tests while wearing no pads (control, CTRL), wearing pads that were not secured (pads loose, PL) and while wearing pads secured “game-tight” (pads tight, PT). The data showed that both forced vital capacity (FVC) and forced expiratory volume in one second (FEV1.0) were significantly decreased in the PT condition compared to either the CTRL or PL condition, with no changes in the FEV1.0/FVC ratio or peak expiratory flow rate. These results are consistent with a restrictive condition and support our hypothesis that tightened shoulder pads reduce pulmonary function. Further studies remain to be performed to determine whether these changes lead to decreased exercise performance and whether equipment modifications can be made to limit alterations in pulmonary function without decreasing the protective value of the pads. Key Points The shoulder pads used in American football extend to the xyphoid process and may provide a restriction to breathing. This was tested in the present study in 24 college-level football players with normal resting pulmonary function. The results showed that there was a decrease in FVC of approximately 150 ml and a similar decrease in FEV1.0. Similar decreases in pulmonary function have been shown to provide a limitation to exercise capacity in otherwise healthy adults. Further study is needed to determine whether these changes lead to decrements in performance. PMID:24501550

Coast, J. Richard; Baronas, Jessica L.; Morris, Colleen; Willeford, K. Sean

2005-01-01