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Biomedical subjects

F Zeltner

Publications and source records attributed to F Zeltner.

At least 19 recordsLinked 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 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

[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↗
PubMed1978

[The ultrasonic diagnosis of jaundice. 199 cases (author's transl)].

Thank to a thorough ultrasonographic analysis of biliary tree ("shotgun sign"), liver and pancreas, a positive diagnosis of obstruction was carried out in 92% of cases. The success rate in diagnosis of level of obstruction was also 92%. Aetiologic diagnosis was successful in 61% of cases only (almost 100% in jaundices of pancreatic origine). No false positive diagnosis of obstruction was made in non-obstructive jaundice. This enabled to carry out instrumental cholangiography (i.e. "skinny" needle percutaneous cholangiography, and ERC) only in case of clinical, biological and sonographic discrepancies, or in hilar obstructions.

Bile Ducts, Intrahepatic↗
PubMed1978

Ultrasonic study of the normal and dilated biliary tree. The "shotgun" sign.

With the advent of real time scanners, segments of the normal biliary tree can now be seen regularly. Normally, the biliary junction is narrower than the portal vein or the portal division. With early dilatation of the bile ducts the diameters of the two systems tend to equalize. Thus, the presence of two parallel ducts with similar diameters is pathologic. As the dilatation of the biliary tree progresses, the portal system may become flattened, thus reversing the initial proportion between the diameter of the biliary junction and that of the biliary tree.

Bile Ducts↗
PubMed1978

[Ultrasonography in jaundice: signs and results in 199 cases (author's transl)].

Ultrasonic patterns of bile ducts dilatation were studied in 199 cases. In the most recent series of obstructive jaundices (50 cases) examined with a high resolution machine, the diagnosis of dilatation was made in 92% of cases, the diagnostic of level of obstruction in 92% of cases, and the diagnosis of cause of obstruction in 61% of cases (but in 22 out of 23 jaundices due to a pancreatic lesion: 95%). No false positive diagnosis was made in non obstructive jaundice. Improved technology had a definite impact on the quality of results.

Bile Ducts↗