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Biomedical subjects

F Weill

Publications and source records attributed to F Weill.

At least 55 records · Page 3Linked to original sources
PubMed1981

Ultrasonic study of hepatic and splenic traumatic lesions.

Traumatic lesions involving the parenchyma of liver and spleen give heterogeneous echo patterns on sonograms. Associated haematomas appear as sonolucent or sonotransparent areas. Subcapsular haematomas appear as peripheral sonolucent or sonotransparent areas. High resolution sectorial real-time ultrasound demonstrates such abnormalities. When examining for splenic or hepatic lesions, associated lesions such as renal contusion, juxta-renal or retroperitoneal haematoma and haemoperitoneum are sought. Haemoperitoneum may be shown in Morrison's pouch, in the vicinity of the spleen (moon-crescent sign) and also in the sac of Douglas. None of the abnormalities is entirely specific for trauma. However, the sensitivity of ultrasound in the evaluation of trauma is sufficient to render other diagnostic procedures such as C.T. and angiography only rarely necessary.

Humans↗
PubMed1980

[Ultrasonic diagnosis of intraperitoneal fluid in Morrison's pouch (and in the splenoperitoneal recess): the moon crescent sign (author's transl)].

Morrison's pouch, and, accessorily, the spleno-peritoneal recess, constitute specific indicators of the presence of intraperitoneal fluid. Intraperitoneal fluid gives rise to sonolucent atraip between the reflectivity of mean intensity of the liver and spleen, and the intense reflectivity of the perirenal fat. That image, which the authors term the "moon crescent sign", is displayed even when the fluid volume is as small as 30 to 40 ml. It is encountered in presence of ascites, but also in presence of fluid of inflammatory origin, of fluid due to pancreatic autolysis, or of blood. Hence the display of a moon crescent sign is of particular interest in the radiologic evaluation of an acute abdomen.

Abdomen, Acute↗
PubMed1980

[Ultrasonic topographical study of pancreatic vascular relationships; I. Splenic vein, SMA, SMV, celiac trunk (author's transl)].

Sonography, a "dissection on the living patient", displays many topographical variations, of whom several are usually not depicted in classical textbooks of anatomy. Sonographic and angiographic studies disclosed the following results: the splenic vein is running above the AMs origin (34%), at the same level (7%), or below (59%). The SMA originates at a distance of 5 to 45 mm of the CT origin. The SMV is running on the right, on the left or in front of the SMA. Such variations must be kept in mind when analysing the morphology and rich vascular relationships of the pancreas.

Celiac Artery↗
PubMed1980

[Ultrasonic topographical study of pancreatic vascular relationships. II. Left renal artery and vein (author's transl)].

An ultrasonic study of 100 normal subjects, associated to the analysis of 17 anatomical preparations, showed that, in 60% of subjects, the left part of the pancreas is located in front of the left renal vessels; this means that the pancreas possesses a much more caudal situation than classically admitted by most of sonologists, and by certain anatomists. An ultrasonic study of the pancreas must therefore begin with transverse scans; the scanning orientation will be modified if the pancreas is oblique; such a modification is immediate if the examination is carried out in real time and in the standing position, a technique which must be routinely employed.

Pancreas↗
PubMed1980

[Ultrasonic study of pancreatic duct dilatations].

The analysis of the pancreatic duct constitutes now a routine step in the evaluation of the pancreas. The display of a dilatation above a cephalic tumor has no clinical application. But, on the other hand, in case of chronic pancreatitis, the display of a dilated duct, whose pattern is often particular ("zip-lie duct"), will be taken into account if an ERCP is considered. Lastly, the sonographic display of a canalar lithiasis is possible.

Chronic Disease↗
PubMed1979

Ultrasonic visualization of Wirsung's duct: dream or reality?

Ultrasonic visualization of normal and pathological Wirsung's ducts has become quite common, especially with the newest gray scale units. Ductal images were studied in 17 cases of quiescent chronic pancreatitis. Duct dilatation could be identified in the majority

Common Bile Duct↗
PubMed1979

[Success rate of ultrasonic exploration of the pancreas. Results of 266 followed-up cases].

In two series amounting to 266 cases, the overall success rate of ultrasonic diagnosis, in pancreatic lesions was 94%. Since most of pancreatic lesions, when clinical symptoms are present, are already rather large, imaging improvements did not enhance accurary, except for small lesions. The tenative analysis of small abnormalities can be responsible, with last generation machines, for an increase of false positive diagnoses.

Diagnostic Errors↗
PubMed1979

[Gastric and intestinal appearances by abdominal ultrasound. The sign of brownian motion (author's transl)].

Gastric, as well as intestinal images, are always present on abdominal ultrasonic scans. Since they are difficult to analyse, such images are usually neglected. Morphological and dynamic criterial (as the "brownian movement sign") enable to identify stomach and intestine. It is then possible to avoid the misinterpretation of normal anatomic elements as pathological processes, and, from time to time, to diagnose specific gastrointestinal lesions.

Adult↗