Significant transplant renal artery stenosis (TRAS) results in an intraarterial pressure gradient and increasing graft dysfunction correctable by endovascular therapy. Kinks of the transplant artery cause velocity gradients on Doppler ultrasound, but some will have no intraarterial pressure gradient across the ...
Energy Citations Database
Contents: General studies with intraarterial chemotherapy; Intraarterial chemotherapy of head and neck cancer; Intraarterial chemotherapy for hepatic cancers; Intraarterial chemotherapy of the gastrointestinal tract; Intraarterial chemotherapy of the extr...
National Technical Information Service (NTIS)
Isometric responses of the cat gastrocnemius-soleus (GS) musculature, under electrical stimulation and close intra-arterial infusion of the neuromuscular junctional area with the response modifier caffeine at concentrations in the range .000001 to .05M ha...
Background:Diffuse cerebral vasospasm following aneurysmal subarachnoid hemorrhage (SAH) refractory to medical management can be treated with intra-arterial administration of vasodilators, but valid bedside monitoring for the diagnosis and therapeutic assessment is poorly available. We demonstrate the successful application of regional cerebral oxygen saturation ...
PubMed Central
Simultaneous and accurate recording of arterial blood pressure and ST segment changes is fraught with technical difficulties. We have developed a new system to enable accurate reproduction of the electrocardiogram and intra-arterial blood pressure, using a transducer/perfusion unit conventionally used to study hypertensive subjects, ...
The report describes a method of recording mean arterial blood pressure from the ischiatic artery of the unrestrained young chick. The mean arterial blood pressure of awake but quiet 6-14 day old chicks averaged 112 mm Hq. The chick blood pressure flucuat...
Changes in the distribution of the hepatic blood flow induced by intra-arterial infusion of angiotensin II (AT-II) were studied in human hepatic cancers using extremely short-lived radioisotope (RI) (krypton 81 m [81mKr]; half-life, 13 seconds). After the start of continuous infusion of AT-II, the radioactivity of the tumor showed about a two-fold increase, whereas that of the ...
PubMed
Changes in the distribution of the hepatic blood flow induced by intra-arterial infusion of angiotensin II (AT-II) were studied in human hepatic cancers using extremely short-lived radioisotope (RI) (krypton 81 m (/sup 81m/Kr); half-life, 13 seconds). After the start of continuous infusion of AT-II, the radioactivity of the tumor showed about a two-fold increase, whereas that ...
Both systolic and diastolic pressures can be measured in children with the mercury sphygmomanometer, the Arteriosonde and the Infrasonde. Estimates made blindly with these instruments were compared with directly measured intra-arterial blood pressures in 50 children aged between 4 days and 14 years. Systolic and diastolic estimates ...
... and the acoustic pressure that accompany the production of consonants ... by different speakers maintaining the same acoustic level of loud speech. ...
DTIC Science & Technology
The cholinergic and purinergic neurotransmission involved in micturition contraction and premicturition contractile activity (bladder hyperactivity) were investigated by continuous cystometry in unanesthetized rats with outlet obstruction. Adenosine triphosphate (ATP), administered intra-arterially close to the bladder, produced rapid, phasic dose-dependent increases in ...
1. The effects of fenoldopam, an orally active, specific dopamine-1 receptor agonist, were studied in eleven patients with essential hypertension, using intra-arterial blood pressure recording and equilibrium gated radionuclide angiography. 2. A single dose of fenoldopam 100 mg produced a fall in blood pressure (BP) starting after 20 ...
The Avionics Pressurometer III is the only noninvasive indirect ambulatory blood pressure system which provides 24-h blood pressure measurements, but it has been subjected to limited evaluation. We report a critical evaluation comparing it to simultaneous intra-arterial blood pressures both at home and at hospital ...
Guyton's capsules were implanted in the submucosa of the gastric corpus of dogs. The pressure of the fluid inside the capsule (ICP) was measured between 12 and 42 days later after mounting the piece of the corpus in a Plexiglas chamber. The capsule was always filled with saline. In two out of three experiments, the ICP did not change significantly when the saline was replaced ...
The arterial catheter position of 500 courses of intra-arterial chemotherapy were monitored by intraarterially introduced Technetium-99m macroaggregated albumin (MAA) particles. Seventeen instances of abnormally positioned catheters (3.4%) were detected by MAA arterial perfusion (MAAAP). All these abnormally positioned catheters were subsequently ...
1. Resting splenic venous outflow from anaesthetized dogs contains prostaglandin-like material: the concentration increases after intra-arterial injections of bradykinin into the spleen, and is abolished by treatment with indomethacin. 2. Intra-arterial injections of bradykinin into the spleen of lightly anaesthetized dogs elicit a dose-dependent reflex ...
We developed methods to quantify arterial structural and mechanical properties in excised rat lungs and applied them to investigate the distensibility decrease accompanying chronic hypoxia-induced pulmonary hypertension. Lungs of control and hypertensive (three weeks 11% O2) animals were excised and a contrast agent introduced before micro-CT imaging with a special purpose ...
NASA Astrophysics Data System (ADS)
... Earthward flow bursts accompanied by magnetic dipolarizations, increases in the convection electric field, and drops in the plasma pressure and density. ...
NASA Website
Hemodynamics is thought to play a role in the growth and rupture of intracranial aneurysms. In 4 patients, we obtained local pressure and BFV by using a dual-sensor pressure and Doppler velocity wire within and in vessels surrounding unruptured aneurysms. Local BFVs can serve as boundary conditions for computational fluid dynamics, whereas ...
The effects of the intraarterial (i,a) or intravenous (i.v.) injection or prostaglandins E1(PGE1), E2 (PGE2), A1 (PGA1), A2 (PGA2) and F2 alpha (PGF2 alpha) on the carotid circulation, intraocular pressure (IOP) and cerebrospinal fluid pressure (CSFP) wer...
ABSTRACT Introduction: Postpartum cerebral angiopathy is one of the many neurological complications seen during pregnancy and the postpartum period. Management of these patients consists of optimal blood pressure control, and general supportive critical care. We present a case of diffuse cerebral vasospasm, which improved with intra-arterial nicardipine. ...
Blood pressure (BP) assessment during resistance exercise can be useful to avoid high BP, reducing cardiovascular risk, especially in hypertensive individuals. However, non-invasive accurate technique for this purpose is not available. The aim of this study was to compare finger photoplethysmographic (FPP) and intra-arterial BP values and responses during ...
In cats treated with reserpine and anaesthetized with pentobarbitone sodium the adrenergic blocking drug, tolazoline, caused a rise of arterial pressure which was inhibited by previous administration of phenoxybenzamine. Tolazoline increased the contractions of the isolated papillary muscles of normal cats but not of cats treated with reserpine. ...
There is evidence that changes in intravascular volume influence long-term cardiovascular events, and that this effect is independent of blood pressure. Using the Poiseuille-Hagen equation for laminar flow through a cylinder, assuming that blood pressure remains unchanged despite any change in intra-arterial volume, and assuming that ...
. Apply opthalamic ointment to eyes to retain moisture. f. Inject 2 % (v/v) LidocaineTM into the scalp catheter to allow blood samples to be collected. Blood gas is monitored once every 2 hours (Rapid Lab 248 pressure, but measurement through an intra-arterial catheter is also possible. Note that fluctuations
E-print Network
Four chronically catheterized dogs were studied initially at 5,200 ft, during a 26-day exposure to 11,400 ft and again upon return to the initial altitude. Heart rate, intra-arterial blood pressure, cardiac output (Q), PaO2, PvO2, PaCO2, PvCO2, pHa and pH...
BackgroundAdvanced pancreatic cancer has a poor prognosis, and the current standard of care (gemcitabine based chemotherapy) provides a small survival advantage. However the drawback is the accompanying systemic toxicity, which targeted treatments may overcome. This study aimed to evaluate the safety and tolerability of KAb201, an anti-carcinoembryonic antigen monoclonal ...
Blood flow through the femoral artery, lymph flow in a lymphatic vessel in the femoral triangle and metatarsal distal venous pressure were measured simultaneously in a canine moving hind limb. 2. Low intra-arterial doses of adrenaline and noradrenaline increased lymph flow even in the presence of marked arterial vasoconstriction. In contrast, isoprenaline ...
Reversible cerebral vasoconstriction syndrome (RCVS) is characterized by recurrent thunderclap headaches and reversible cerebral vasoconstrictions. RCVS is more common than previously thought and should be differentiated from aneurismal subarachnoid hemorrhage. RCVS can be spontaneous or evoked by pregnancy or exposure to vasoactive substances. Patients tend to be middle-aged women but pediatric ...
Cardiovascular responses to intravenous administration of a piperamide analogue, LASSBio 365, were investigated in anesthetized rats. LASSBio 365 [62.5-1000 microg/kg, intravenously (IV)] has potent cardiovascular effects that include hypotension and bradycardia, accompanied by a brief pressor effect and apnea. Bilateral vagotomy or atropine injection (2 mg/kg, IV) completely ...
In 20 runners the intra-arterial blood pressure changes determined by a long-distance run and by a maximal bicycle ergometric test were recorded by means of the portable Oxford system. A peculiar pattern of the phasic waves was observed throughout the run: continuous rhythmic pulse pressure oscillations ranging in frequency between 4 ...
Purpose: To assess the accuracy of intraarterial measurement of transstenotic pressure gradients for the detection of hemodynamically suboptimal iliac angioplasty. Methods: In 14 patients, referred for diagnostic angiography, mean pressure gradients in the aorta and iliac artery were obtained twice, using a double-sensor ...
Purpose: To determine initial technical results of percutaneous transluminal angioplasty (PTA) and stent procedures in the iliac artery, mean intraarterial pressure gradients were recorded before and after each procedure. Methods: We randomly assigned 213 patients with typical intermittent claudication to primary stent placement (n= 107) or primary PTA (n= ...
To assess the reliability of the Del Mar Avionics indirect blood pressure (BP) monitoring system 15 hypertensive patients were concomitantly studied with the intraarterial Oxford system. During daytime a statistically significant correlation was found between the BP values obtained with the two systems. On the contrary during the night this correlation in ...
The aim of this study was assess the therapeutic effect of targeted intra-arterial verapamil infusion in liver cancer patients and its side-effects in a dog model. The blood verapamil levels in dogs were determined after one-off intra-arterial infusion (0.7�mg/kg). Blood pressure, breathing state, and II-lead electrocardiogram were ...
Pulse contour methods determine cardiac output semi-invasively using standard arterial access. This study assessed whether cardiac output can be determined non-invasively by replacing the intra-arterial pressure input with a non-invasive finger arterial pressure input in two methods, Nexfin CO-trek and Modelflow , in 25 awake patients ...
Arteriovenous malformations (AVMs) are composed of abnormal arterial and venous vessels in the brain causing arteriovenous shunts of arterialized blood directly from pial arteries to draining veins. The hemodynamics of these lesions is not well-understood. Changes in blood flow and pressure are probably related to the natural history of AVMs and may also play a major role in ...
Despite frequent reporting of blood pressure during profound passive heat stress, both with and without a hypotensive challenge, the method by which blood pressure is measured often varies between laboratories. It is unknown whether auscultatory and finger blood pressure measures accurately reflect intra-arterial ...
accompanying standing waves will occur. At the maxima in these standing ... in these standing waves, the acoustic pressures can build up considerably ...
... The decrease in perfusion pressure and the accompanying apnea was enough to produce hypoxia at speeds greater than 140 rpm, as evidenced ...
... The procedure sees as input a velocity difference not accompanied by a pressure difference, hence calls for a single shear wave, as if the gases ...
... Title : Magnetic Rubber Hydrophones. ... The hydrophones were intolerably sensitive to static pressure variations accompanying sea operations. ...
altimetry; Altimetry; Altimeter; altimeter: An aneroid barometer designed to register changes in atmospheric pressure accompanying changes in altitude ...
... Pagination or Media Count : 57. Abstract : Brain missile wounding (BMW) is accompanied with a concomitant increase in intracranial pressure (ICP). ...
... Abstract : The pressure oscillations accompanying the moving striations in the positive column region of a neon filled discharge tube were observed ...
The interstitial fluid pressure of the submucosa of the gastric fundus was monitored by means of Guyton's capsules in dogs anesthetized with pentobarbital. The intracapsular pressure (ICP) was measured during secretion produced by: a) hypertonic solutions placed inside the stomach; b) arterial hypertension (200 mmHg) applied during ...
Recent publications referring to pressure tubes for nuclear reactors are listed with accompanying summaries. (11 references) (J.R.D.)
... RESULTS Lift and Drag The effect of injection on both lift and drag coefficients ... increases, suggests a pressure drag effect due to the reduced ...
Endothelium-dependent vasodilation is impaired in obese versus lean humans. We set out to evaluate whether agonist-mediated endothelium-dependent vasodilation varies by season in a cross-sectional dataset of lean and obese humans, and whether this effect differed by obesity status. All vascular studies performed in our laboratory over a 12year period from 1997 to 2009 were evaluated. ...
The results of intraarterial chemotherapy (IACT) combined with definitive radiation therapy for 23 advanced and bulky carcinomas of uterine cervix are reported. IA-CT with cisplatin 50 mg and doxorubicin 30 mg was administered by one shot method in bilateral internal iliac arteries. The protocol consisted of one to three treatment session every 3 weeks. Nine of eleven patients ...
The regulation of blood flow of the dental pulp was investigated in dogs and rats anesthetized with sodium pentobarbital. Pulpal blood flow was altered by variations of local and systemic hemodynamics. Macrocirculatory blood flow (ml/min/100 g) in the dental pulp was measured with both the /sup 133/Xe washout and the 15-microns radioisotope-labeled microsphere injection methods on the canine teeth ...
Purpose: To quantitatively evaluate the usefulness of lipiodol-CDDP suspension (LCS) chemotherapy in hepatocellular carcinoma (HCC).Methods: CDDP (cis-diamminedichloroplatinum) powder was prepared by removing the water and NaCl from aqueous CDDP. Two quantities of prepared CDDP powder, 10 mg and 20 mg, were mixed with 1 ml each of iopamidol 300 mgl/ml (IP300) and lipiodol (LPD) using a high ...
Purpose: To quantitatively evaluate the usefulness of lipiodol-CDDP suspension (LCS) chemotherapy in hepatocellular carcinoma (HCC).Methods: CDDP (cis-diamminedichloroplatinum) powder was prepared by removing the water and NaCl from aqueous CDDP. Two quantities of prepared CDDP powder, 10 mg and 20 mg, were mixed with 1 ml each of iopamidol 300 mgI/ml (IP300) and lipiodol (LPD) using a high ...
1. Blood pressure was measured both directly and indirectly in seven hypertensive patients before and after a single oral dose of 100 mg metoprolol, at rest and during sustained handgrip. 2. Intra-arterially measured systolic and diastolic blood pressure increased linearly with time during sustained handgrip at 50% of maximal voluntary ...
The effect of environment on blood pressure was studied by recording intra-arterial pressure continuously in nine patients with essential hypertension during controlled periods of activity and rest at home and in hospital. Mean systolic pressure was higher at home (152 +/- 16 mm Hg) than in hospital (138 +/- 11 mm ...
Purpose: Manual and automatic pulse-spray infusion techniques are compared in vitro to evaluate the efficacy of thrombolysis and the distribution of urokinase and saline solution within thrombus using a pulse-spray catheter. Methods: A pulse-spray catheter was introduced into a human thrombus within a stenotic flow model. Automatic and manual pulsed infusion of urokinase and automatic pulsed ...
To assess the accuracy of spectral indices of arterial pressure variability and baroreflex sensitivity obtained from beat-by-beat noninvasive blood pressure recordings by the Finometer device, we compared these measures with those obtained from intra-arterial recordings. The performance of the Finometer was also compared to the ...
Continuous head irradiation (dose rate 350 to 400 rad per min) in rabbits brings about cardiodynamic disturbances only in the terminal stage. During this period, artificial rise of the blood pressure with intraarterial injection of polyglucin or maintaining the animals on an artificial respiration markedly normalizes the structure of the cardiac ...
Little is known of the cardiorespiratory control mechanisms utilized by hypoxia-tolerant teleost fish to tolerate prolonged periods (h) of near anoxic exposure. Here, we report on the cardiorespiratory control mechanisms of the common carp Cyprinus carpio L. during normoxia and prolonged, severe hypoxic (<0.3 mg O(2) L(-1)) exposure at acclimation temperatures of 5 degrees C, 10 degrees C, and ...
OBJECTIVEThe purpose of this study was to examine the effects of weight loss on sympathetic nervous system responsiveness to glucose ingestion in obese subjects with metabolic syndrome, in whom such responses are reportedly blunted.RESEARCH DESIGN AND METHODSThirty four subjects, 19 insulin resistant and 15 insulin sensitive and aged 55 � 1 years (mean � SE) with BMI 31.6 � 0.6 ...
During the continuous monitoring of intra-arterial blood pressure in ambulant hypertensive subjects, 18 episodes of coitus were recorded in 11 subjects. Peak values of up to 300/175 mmHg found, the mean for men being 237/138 mmHg and for women 216/127 mmHg. Two patients with coital symptoms (cephalgia and syncope) showed no unusual responses and, when ...
PurposeTreatment options after arteriovenous fistula(AVF) associated steal include: ligation, banding, and distal revascularization-interval ligation(DRIL). The purpose of this study was to evaluate arterial pressure gradients in upper extremity steal syndrome.MethodsPre-operative arteriography and sequential intra-arterial pressure ...
OBJECTIVE:The aim of this study was to describe blood pressure responses during resistance exercise in hypertensive subjects and to determine whether an exercise protocol alters these responses.INTRODUCTION:Resistance exercise has been recommended as a complement for aerobic exercise for hypertensive patients. However, blood pressure changes during this ...
The feasibility of measuring blood pressure (BP) variability by a noninvasive beat-to-beat finger arterial BP device (Finapres) was assessed in preterm infants. By application of the finger cuff around the infant's wrist, time and frequency domain (spectral power) analysis of noninvasive beat-to-beat BP signals were compared with intra-arterial ...
The cardiovascular and respiratory reflex effects brought on by the infection into the femoral artery of bradyquinine and of hypertonic sodium chloride solutions and by rhythmic muscular work and muscular work of tetanic type induced by low and high frequency electrostimulation in the muscles have been investigated in the rear extremity anaesthetized rabbits. Intra-arterial ...
A 34-year-old woman with a previous history of severe headache ("thunderclap") was admitted with a diagnosis of aneurysmal subarachnoid hemorrhage (SAH). The patient developed symptomatic vasospasm on day 5 that resolved rapidly after having increased arterial blood pressure. She experienced also short-lasting excruciating headache. On day 12, while velocities had normalised, ...
Brain missile wounding (BMW) is accompanied by a concomitant increase in intracranial pressure (ICP). Both, BMW with its accompanying increase in ICP or artificially increased ICP, without wounding, caused significant epinephrine (EPI) depletions (47%-68%...
The technique of vascular labeling was developed to mark sites of increased microvascular permeability. We used the vascular labeling technique in anesthetized sheep and found that hemodynamics and airway pressure were adversely affected by intraarterial infusions of two vascular tracers. Monastral blue (nine sheep) immediately caused systemic arterial ...
The plant, Stevia rebaudiana Bertoni (SrB), has been used for the treatment of diabetes in traditional medicine. Previously, we have demonstrated that long-term administration of the glycoside stevioside has insulinotropic, glucagonostatic, anti-hyperglycemic and blood pressure-lowering effects in type 2 diabetic animal models. The aim of this study was to elucidate if ...
Three-dimensional rotational angiography (3DRA) is useful for detecting, classifying and planning treatment for intracranial aneurysms. Prolonged contrast material (CM) injection, required for 3DRA, might cause blood pressure changes in the selectively catheterized artery. The purpose of this study was to assess the extent and clinical relevance of haemodynamic changes in the ...
The purpose of this study was to measure the blood pressure and electrocardiographic responses of a small, matched group of women (n = 8) and men (n = 9) who experienced typical, effort angina during an exercise on the treadmill (up to the second stage of a Bruce protocol). These responses were measured before and after therapy with diltiazem (60 mg four times daily for 1 ...
The authors compared intraarterial digital subtraction angiography (DSA) studies with those of conventional angiography, performed for 24 patients who had intracranial tumors. Intraarterial DSA is more effective in evaluating tumoral blush and venous phase, but neovascularization can be judged better by conventional angiography. In most cases, ...
Experimental studies have shown that convergent-divergent nozzles, when run at low pressure ratios, often undergo a flow resonance accompanied by the ...
The program has involved a kinetic study of the pyrolysis of tetrafluorohydrazine. The reaction was accompanied by pressure decrease and was found to occur heterogeneously in glass but homogeneously in passivated Monel. The reaction was therefore studied ...
... r =c k(OF2 ) + lca(0F2 )/2(H12 ... In addition, these oscillations in concentration were accompanied by pressure pulses and audible pops. ...
During the present project it was shown that slow cyclic changes of blood flow and arterial pressure in spinal animals are accompanied by alterations of sympathetic nervous output to the vascular musculature with an identical cycle length. Furthermore, bo...
... During the warm season (April-September), the California coast is under the ... flow is often accompanied by a rise in sea-level pressure, lower ...
At pressure ratios lower than the design value, convergent-divergent (C-D) nozzles often undergo a flow resonance accompanied by the emission of acoustic ...
The objective of this study was to appraise the practicability of hydrophones formed from magnetic rubber. The hydrophones were intolerably sensitive to static pressure variations accompanying sea operations. They could perhaps find application as towed a...
Studies of Canine Response to Changes in Arterial Pressure Accompanied ... Utilizing canines with cuffs implanted on the vena cava and either ...
Hemodynamic alterations that accompany cardiac tamponade and constrictive pericarditis were studied in man and in experimental animals. Constrictive pericarditis and cardiac tamponade increase pulmonary and systematic venous pressure and decrease cardiac ...
... supraorbital, and/or temporal pain lasting 15-180 min if untreated C. Headache is accompanied by at ... from Headache Classification Subcommittee of the International Headache Society) These headaches are caused by the pressure of ...
MedlinePLUS
... Abstract : The electron emission, positive ion emission, photon emission, and long wave-length electro-magnetic radiation accompanying the ...
the containment of the post impact debris which is accompanied by high heat and pressure ... and the fact that the debris cloud does not necessarily ...
This activity, created to accompany the museum's Milstein Hall of Ocean Life, gives students a hands-on look at the effects of increased water pressure and shows them how submarines work.
NSDL National Science Digital Library
temperature of air affects its vertical movement. OBJECTIVES ... accompanying decrease in atmospheric pressure; changing altitude can change a boiling point. ...
BackgroundThe PROACT II trial showed that intra?arterial thrombolysis (IAT) is effective for treatment of acute ischaemic stroke attributable to M1 and M2 segment occlusions. Incidence of symptomatic intracranial haemorrhage (sICH) was 10%.Objective: To evaluate the risk and predictors of sICH after IAT by using urokinase in a large number of patients presenting with the whole ...
The novel ability to quantify drug and tracer concentrations in vivo by optical means leads to the possibility of detecting and quantifying blood brain barrier (BBB) disruption in real-time by monitoring concentrations of chromophores such as Evan's Blue. In this study, experiments were conducted to assess the disruption of the BBB, by intraarterial injection of mannitol, in ...
Cerebral vasospasm (cv) is a common and serious consequence of subarachnoid hemorrhage. Interventional neuroradiologic techniques for treating cv refractory to medical and hemodynamic measures have included transluminal microballoon angioplasty and intra-arterial papaverine infusion (pap). Eight patients (pts) who had symptomatic cv but were not candidates for microballoon ...
In this study the authors determined the effect of papaverine on regional cerebral blood flow (rCBF) in the angiographically normal arteriolar beds of patients with arteriovenous malformations (AVMs) who underwent transfemoral superselective angiography. Middle cerebral artery (MCA) branch vessels were catheterized during 10 procedures performed in nine patients. The mean (+/- standard deviation) ...
A thermodynamic state of solvent and solution separated with an elastic semipermeable membrane, in the box with a fixed volume, is considered. It is shown that the minimum of the free energy is accompanied by the compression of the solution and tension of the solvent caused by the transfer of solvent molecules into compartment with solution. The tensile state of the solvent is ...
Measurement of the arterial blood pressure (BP) is a time-honored, vital piece of medical information whose accuracy is seldom questioned. This review identifies the unappreciated weakness of the early validation data that compared the cuff to intra-arterial BP's. Unfortunately, the inaccuracy of the auscultatory systolic (SBP) and diastolic (DBP) ...
A novelty store "Drinking Bird" repeatedly dips is beak into a beaker of water and then bobs back to an upright position. Visible movement of a liquid in the bird's body accompanies the bobbing; the movement is caused by changing vapor pressure of the liquid due to different temperatures at the bird's head and the bird's body.
The specifications for the D1G reactor pressure vessel and accompanying insulation, shield tank, thermocouples, test heads, fixtures, tools, and repair parts are given- (T-R-H-)
When a train enters a tunnel, an unsteady flow of air occurs in the tunnel near the front end of the train, and this disturbance is propagated down the tunnel as a pressure wave. Accompanying this is a change of air pressure on the exterior of the train. ...
A typographical error in an equation in the published paper gave rise to incorrect versions of figures 5 and 7. The corrected equation and figures are shown in the accompanying PDF file
Previous animal studies revealed that acute cerebral ischemia induced by air embolism is accompanied by a sharp and pronounced rise in both systemic blood pressure and intracranial pressure. To investigate possible approaches to the treatment of severe in...
Sudden loss of coolant in a pressurized water reactor due to failure of a coolant pipe would result in flashing of the coolant accompanied by the propagation of a rarefaction wave into the downcomer. A computer program that simultaneously calculates the b...
Balloon data consisting of a plot showing the mixing ratio of ozone partial pressure in micromillibars and temperature in degrees centigrade versus pressure altitude in millibars is presented. An accompanying tabulation of meteorological and constituent d...
Emotional stress developed in immobilized rats was shown to be accompanied by changes in the regulation of arterial pressure and the frequency of cardiac contractions. A group of adapting rats displayed definite resistance to emotional stress, while a gro...
In the cat with intact sinoaortic reflexes, episodes of deep sleep are accompanied by marked falls in both systolic and diastolic blood pressure. The falls are much larger after bilateral sino-aortic deafferentation: to such low pressures during deep slee...
The problem of the pressure broadening of spectral lines is investigated with respect to the microwave absorption of two terrestrial atmospheric gases, oxygen and water vapor. A formalism and accompanying computational procedures under the impact approxim...
Transcranial ultrasound in combination with intravenously administered ultrasound contrast agents (UCA) in the presence or absence of recombinant tissue plasminogen activator (rt-PA) has been widely evaluated as a new modality for treatment of ischemic stroke. Despite the successful demonstration of accelerated clot lysis there are inherent limitations associated with this modality such as ...
Sudden loss of coolant in a pressurized water reactor due to failure of a coolant pipe would result in flashing of the coolant accompanied by the propagation of a rarefaction wave into the downcomer. A computer program that simultaneously calculates the behavior of the coolant and the accompanying motion of the core support barrel ...
Two-F-111A airplanes were subjected to conditions that caused engine compressor surges and accompanying duct hammershock pressure transients. Flight speed ranged from Mach 0.71 to Mach 2.23, and altitude varied from approximately 3200 meters to 14,500 met...
The augmentation index predicts cardiovascular mortality and is usually explained as a distally reflected wave adding to the forward wave generated by systole. We propose that the capacitative properties of the aorta (the arterial reservoir) also contribute significantly to the augmentation index and have calculated the contribution of the arterial reservoir, independently of wave reflection, and ...
The skin perfusion on the calf was measured photo-electrically and by isotope washout technique using external counter pressure by a blood pressure cuff. By the photocell the skin blanching threshold external pressure (BTEP) was recorded on histamine flared red skin. By isotope washout technique the skin blood flow cessation external ...
Arteriobiliary fistula is a rare complication of hepatic intra-arterial chemotherapy. We report successful coil embolization of an arteriobiliary fistula. An 80-year-old woman underwent percutaneous placement of an indwelling catheter into the replaced right hepatic artery for intra-arterial chemotherapy of liver metastases. Coil embolization of the left ...
By employing the state-of-the-art in situ high-pressure synchrotron x-ray measurements and ab initio modeling, we have resolved atomic-level packing details in a metallic glass as a function of pressure. We demonstrate pronounced changes in atomic size ratio (and correspondingly coordination number) with increasing pressure and the ...
In order to get a proper pressure transmission substance for the clamped type high pressure bomb, physical properties of several liquids, such as petroleum ether, kerosene, dehydrate transformer oil, a mixture of kerosene and dehydrate transformer oil, were examined in details at 77�K. It was found that all liquids above mentioned solidify on cooling but ...
A hybrid NiCrAl pressure cell was fabricated to measure magnetic quantities under high pressure above 3 GPa. A pressure of 4.0 GPa was achieved and the pressure cell was found to be reusable even after a pressurizing trial up to 4.0 GPa. Pressure was monitored using (63)Cu ...
A hybrid NiCrAl pressure cell was fabricated to measure magnetic quantities under high pressure above 3 GPa. A pressure of 4.0 GPa was achieved and the pressure cell was found to be reusable even after a pressurizing trial up to 4.0 GPa. Pressure was monitored using {sup ...
An improved method of fracturing a geological formation surrounding a well bore is disclosed. A relatively small explosive charge is emplaced in a well bore and the bore is subsequently hydraulically pressurized to a pressure less than the formation breakdown pressure and preferably greater than the fracture propagation ...
DOE Information Bridge
The growth rate of Chlorella sorokiniana decreased in a linear fashion as the partial pressure of oxygen was increased from 711 to 1,478 mm of Hg. Under two atmospheres of oxygen pressure, growth ceased after 10 to 12 hr. This cessation of growth was not due to any permanent injury, as growth resumed when oxygen partial pressure was ...
This article investigates the regimes of combustion of model fuels with a drop in pressure. The following fuel compositions were examined: a reference composition consisting of a model nitroglycerine fuel, nitroglycerine fuel with a 2% additive of lead and copper compounds, and nitroglycerine with the addition of 1% compound of lead. The temperature gradient in the gas near ...
1. In anaesthetized cats the sciatic nerve was cut and the central end was stimulated at a high frequency and voltage. This caused an increase in arterial blood pressure and a rise in heart rate. The pressure response was diminished by dorsal root section but not completely eliminated until ventral root section (L4-S3). The tachycardia response was ...
Experiments have been conducted in the Loss-of-Fluid Test (LOFT) pressurized water reactor (PWR), at the Idaho National Engineering Laboratory, in which transient phenomena arising from accident events with and without reactor scram were studied. The main purpose of the LOFT facility is to provide data for the development of computer codes for PWR transient analyses. ...
The intracarotid sodium amobarbital (Amytal) test, the Wada test, remains an efficient test for evaluation of language and memory function. However, due to a world shortage of amobarbital, it has become necessary to investigate the use of alternatives. We report the efficacy of the Wada test using secobarbital sodium (Ional) in determining language dominance. An accurate determination of language ...
Aims:We evaluated the relationship between distribution of lesions in coronary tree and atherosclerotic renal artery stenosis (RAS).Methods and results:Data collected prospectively on 500 consecutive patients who underwent simultaneous renal angiography following coronary angiography. Overall prevalence of RAS was 26.2% (131 patients). Significant (?50% luminal diameter stenosis) RAS was present ...
1. The effects of intravenous and intra-arterial infusion of the peptides derived from prepro-vasoactive intestinal peptide, vasoactive intestinal peptide, peptide histidine methionine and peptide histidine valine, were examined in six healthy volunteers. 2. Vasoactive intestinal peptide given intravenously caused a significant increase in heart rate and a decrease in ...
Cerebral blood flow (CBF) was measured by intra-arterial injection of xenon 133 in 29 patients during cardiac operations. Marked changes occurred in all patients. A normal and significant correlation with temperature and plasma pCO/sub 2/ (p less than 0.01) support the reliability of the method. Mean CBF measured between sternotomy and the onset of extracorporeal circulation ...
... UMESC Publications Pharmacokinetics of benzocaine in rainbow trout ( Oncorhynchus mykiss ) after intraarterial dosing Meinertz, J. R., Stehly, G. ... H., 1996, Pharmacokinetics o...
NBII National Biological Information Infrastructure
The relationship of arterial blood flow and venous volume to venous flow velocity was studied in normal subjects. The effects of current modes of treatment in venous thrombosis and of a vasodilator drug on venous flow velocity were also investigated. Total calf flow and venous volume were measured by venous occlusion plethysmography while venous flow axial velocity was determined by the transit ...
Invasive intra-arterial blood pressure measurement is the most accurate method but not practical if the subject is in motion. The apparatus developed by Wesseling et al., based on a volume-clamp method of Penaz (Finapres), is able to monitor continuous finger arterial pressure waveforms noninvasively. The limitation of Finapres is the ...
