Femoral flow was measured by Doppler ultrasound (Doppler-echo), and mean pressure by an arterial catheter introduced into the abdominal aorta. ...

Laser Doppler anemometry is recognized as the technique providing the most accurate velocity measurements in experimental fluid dynamics. This technique has been applied at the Laboratory of Biomedical Engineering of the Instituto Superiore di Sanita to t...

This is an introductory article on abdominal vascular ultrasound in dogs. An overview of the hemodynamics of venous and arterial blood flow and Doppler principles, spectral analysis, and velocity waveforms is given. The anatomic and Doppler features of major abdominal vessels that can be examined routinely with ...

The techniques of ultrasound Doppler velocimetry have attained by now a wide diffusion in the clinical field. The progress in signal processing enables a quantitative evaluation of the circulatory phenomena. Hence, the local velocities of the blood flow c...

This prospective study was aimed at comparing the diagnostic accuracy of Magnetic Resonance Angiography (MRA) with that of color-Doppler ultrasonography (color-Doppler US) in the detection and assessment of abdominal aortic aneurysms. Twenty patients with abdominal aortic aneurysms underwent MRA, ...

Laparoscopy in general surgery is becoming a wide-spread technique. Substantial anterior abdominal wall haemorrhage is a recognised complication of the laparoscopic technique. Ten patients were examined with an 8 MHz hand-held Doppler and the anterior abdominal wall vessels were marked on the skin. Colour flow duplex was used to ...

We report an unusual case of a enlarging anterior abdominal wall hematoma after percutaneous biopsy of a renal allograft. Angiography-directed embolization of the vessels filling the pseudoaneurysm was done and followed up with surgical exploration of the hematoma. In order to avoid this complication, Color Doppler evaluation of the overlying ...

We report an unusual case of a enlarging anterior abdominal wall hematoma after percutaneous biopsy of a renal allograft. Angiography-directed embolization of the vessels filling the pseudoaneurysm was done and followed up with surgical exploration of the hematoma. In order to avoid this complication, Color Doppler evaluation of the overlying ...

fetal Ecografía abdominal Ecografía de la tiroides Ecografía de las mamas Ecografia de los testículos Ecografía del embarazo Ecografía Doppler de un brazo o de una...

Haemodynamics studies of abdominal aortic aneurysm require data on the velocity in the normal section of the aorta. Centreline velocity waveforms were measured in abdominal aortic aneurysm patients proximal to the aneurysm using spectral Doppler ultrasound. Characteristic points were automatically found on 21 of the waveforms and their ...

Celiac artery compression syndrome is a rare cause of abdominal pain and weight loss, likely caused by compression of the celiac artery or plexus by the median arcuate ligament. A case of celiac artery compression syndrome in a 17-year-old male patient with severe postprandial pain and weight loss is described. Imaging techniques such as computed tomography, angiography and ...

Spectral waveform analysis of blood flow velocity in the major arteries of six healthy, conscious immature micropigs was determined using Doppler ultrasonography. Doppler spectral tracings were recorded from the external iliac artery, femoral artery, and renal arcuate artery. Tracings were also taken from three parts of the common carotid artery and two ...

PurposeWe examined the relationship between portal venous velocity and hepatic-abdominal fat in patients with nonalcoholic fatty liver disease (NAFLD), using spectral Doppler ultrasonography (US) and magnetic resonance imaging (MRI).Materials and MethodsIn this prospective study, 35 patients with NAFLD and 29 normal healthy adults (control group) underwent ...

Splenic artery aneurysm (SAA) is a rare complication after orthotopic liver transplantation (OLT). Although SAAs are often incidental findings, in some cases they present with signs and symptoms of abdominal mass or intra-abdominal hemorrhage. The diagnosis requires Doppler ultrasound and confirmation with computed tomography, magnetic ...

... Descriptors : *DOPPLER NAVIGATION), (*DOPPLER RADAR, (*DETECTORS, DOPPLER SYSTEMS), AIRCRAFT EQUIPMENT, DOPPLER ...

This report describes the use of thrombin to treat a type II endoleak which was causing continued abdominal aortic aneurysm expansion in a patient who had undergone endovascular repair. A small quantity of thrombin was injected into the leak by a percutaneous approach directly into the aneurysm sac using color doppler ultrasound. The procedure was ...

Splenic hamartoma is a rare benign tumor of the spleen. It is usually found incidentally at autopsy or splenectomy. We report a case of splenic hamartoma that was discovered during medical workup for vague upper abdominal pain. Abdominal sonography demonstrated a well-demarcated, slightly hypoechoic splenic solid mass; the mass was markedly enhanced on ...

A three-month-old puppy had ascites, but its heart was normal by auscultation. Abdominal ultrasonography revealed an enlarged liver, distended hepatic veins and a distended caudal vena cava. Doppler ultrasonography detected retrograde flow in the caudal vena cava and abnormally pulsatile flow in the hepatic veins and caudal vena cava. A non-selective ...

BACKGROUND: Torsion of undescended testis located within the inguinal canal is a rare finding in the emergency department (ED). This diagnosis can present as�undifferentiated abdominal or groin pain, and a full genitourinary examination is essential to making this diagnosis. OBJECTIVES: We present this case to increase awareness among emergency physicians regarding torsion ...

The case of a 39-year-old male patient with symptoms of persistent abdominal pain and melena, affected by Henoch-Sch�nlein purpura, is reported. Abdominal CT was requested. The examination was justified by the fact that symptoms could be correlated with other pathological conditions (volvulus, neoplasms, Chron's disease, etc.) which had to be excluded. ...

The 1984 edition of Ultrasound Annual explores new applications of ultrasound in speech and swallowing and offers guidelines on the use of ultrasound and nuclear medicine in thyroid and biliary tract disease. Other areas covered include Doppler sonography of the abdomen, intraoperative abdominal ultrasound, sonography of the placenta, ultrasound of the ...

AbstractHealthy adult horses were examined by using transabdominal ultrasonography to quantitatively and qualitatively evaluate activity of the jejunum, cecum, and colon with B mode and Doppler techniques. Doppler ultrasound was used to assess jejunal peristaltic activity. Examinations were performed on multiple occasions under imposed colic evaluation ...

Personal experience with pulse wave Doppler (PWD) at 20 MHz with real time signal spectral analysis in FFT (Fast Fourier Transform), for the valuation of the vascular microanastomosis patency degree is reported. Fifty-nine Sprague-Dawley rats have been studied after abdominal aorta dissection: in 19 (group A) an organic stenosis has been simulated varying ...

Acquiring data about venous or arterial vessel size is important for several reasons, given the increasing incidence of thomboembolic phenomena and arterial aneurysms and the emerging new vascular techniques. We studied 250 healthy subjects (125 men and 125 women; age range: 50 to 91 years) with no known vascular pathology, nor hypertension, nor diabetes. We assessed the caliber of ...

The aim of this research was to determine the effects of abdominal aortic aneurysm (AAA) on blood flow patterns in the common femoral artery (CFA) and to determine the feasibility of detecting AAA by analysis of the CFA Doppler waveform. CFA Doppler waveforms were measured from 30 patients with AAA and 30 normal patients without ...