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Biomedical subjects

N Vasile

Publications and source records attributed to N Vasile.

At least 55 records · Page 3Linked to original sources
PubMed1989

Evaluation of Doppler examination for diagnosis of catheter-related deep vein thrombosis.

The accuracy of Doppler examination was evaluated for the diagnosis of catheter-related venous thrombosis in 40 postoperative patients. Deep vein thrombosis was detected by venography in 15 patients and confirmed by the Doppler technique in a double blind study. Only one false-positive and one false-negative result were obtained with the Doppler technique. This technique appears to be valuable for the early diagnosis of catheter-related vein thrombosis, even in asymptomatic patients.

Catheterization, Central Venous↗
PubMed1989

Percutaneous management of pyogenic liver abscesses.

Twenty-four pyogenic liver abscesses have been treated during a six-year period percutaneously. Percutaneous management included percutaneous drainage and fine needle aspiration under ultrasound or CT scan guidance. Percutaneous management was successful in 92% of cases, and no further treatment was required in 91% of these. One patient died, giving a mortality rate of 4.1%. There were no complications related to this method. The authors conclude that percutaneous management of pyogenic liver abscesses should be attempted in all cases, since results compare favourably with surgical procedures.

Adolescent↗
PubMed1989

Pancreatic cystic neoplasms.

Cystic neoplasms are an uncommon group among pancreatic tumors. Because of advances in noninvasive diagnostic procedures, these lesions are more frequently detected and surgically treated. New pathological entities have been recently described with their own prognosis. 1. In a large number of cases, the imaging procedures can differentiate microcystic adenoma from mucinous cystadenoma, the more frequently encountered lesions. A well-defined mass with innumerable small cysts producing a honeycomb appearance with central stellate septae is suggestive of microcystic adenoma. A well-defined multilocular mass containing thin, straight or curvilinear septae with papillary projections and local thickening is suggestive of mucinous cystadenoma. 2. No sonographic or CT finding allows the differentiation between mucinous cystadenoma and cystadenocarcinoma, however; the imaging features depend on the grade of malignancy. 3. Thus, in the majority of cases of cystic lesions, fine needle aspiration with appropriate stains is recommended.

Biopsy, Needle↗
PubMed1989

[Tolerability of a new non-ionic contrast medium, iopromide in x-ray computed tomography. Comparison with ioxaglate 320 mgI/ml].

Three randomized prospective and comparative trials were conducted in 165 patients undergoing brain (80) and whole body (85) CT scans. The two products compared where a new non-ionic contrast medium iopromide 300 (brain) and 370 (whole body) and the ionic low osmolar contrast medium, ioxaglate 320. Imaging quality was not different but the tolerance of the non-ionic medium was significantly better (p less than 0.05).

Contrast Media↗
PubMed1988

Hepatic vein involvement in hepatocellular carcinoma.

A retrospective review of the dynamic computed tomography (CT) and ultrasound scans from examinations of 134 patients with hepatocellular carcinoma was undertaken with emphasis on evaluation of hepatic vein involvement. Hepatic veins were involved in 8 patients (5.9%). Portal vein obstruction was associated in 7 of these cases. Sonography demonstrated hepatic vein involvement in 6 cases was considered within normal limits in 1 and failed to display hepatic veins in another. Dynamic CT was superior in depicting venous obstruction in all the cases by different signs including (a) hypodensity and enlargement of the vessel, (b) perivenous arterial hypervascularization surrounding the hypodense intraluminal region, and (c) hemokinetic changes in relation to the outflow obstruction. The frequency and significance of these CT signs are discussed and correlated in 2 patients with magnetic resonance imaging (MRI) data.

Adolescent↗
PubMed1987

[Intrahepatic collections of fluid of pancreatic origin. A case].

A case of intrahepatic liquid collections of pancreatic origin is reported. A search in the literature yielded 8 cases of pancreatic pseudocysts which developed in the liver left lobe. The present case was original owing to its localization in the right hepatic lobe, to the large volume of the intrahepatic effusions and to the scarcity of underlying pancreatic symptoms. Ultrasonography and computerized axial tomography were useful aids to the diagnosis as well as to the therapeutic procedures. Surgery, which usually is a matter of discussion in chronic pancreatitis, was necessary to obtain the favourable outcome expected in such diseases.

Humans↗
PubMed1987

Budd-Chiari syndrome: dynamic CT.

A retrospective multi-institutional study was carried out on a series of 38 patients with histologically proved Budd-Chiari syndrome: Five patients had acute disease, and 33 had subacute or chronic disease. All patients underwent dynamic CT scanning. Angiography was performed in 20 cases, inferior cavography in 22, and wedge-hepatic venography in 16. In all acute cases, CT showed global liver enlargement with diffuse hypodensity on plain scans and patchy enhancement after contrast material injection. Thrombosis of the three main hepatic veins was always demonstrated. In subacute or chronic disease, plain CT scans showed abnormalities of liver morphology and hypodensity either in atrophic areas (19 cases) or in the periphery of the liver (eight cases). With dynamic CT, patchy enhancement was present in 28 cases. Correlation with angiography in 15 cases revealed a normal portal blood flow in enhanced areas and an inversed portal blood flow in atrophic areas. Different morphologic and enhancement patterns on CT scans could be related to the direction of portal blood flow, which changes with different stages of Budd-Chiari syndrome.

Acute Disease↗
PubMed1986

Hepatic adenomas and focal nodular hyperplasia: dynamic CT study.

A retrospective, multi-institutional study was carried out on a series of 50 histologically proved benign hepatic tumors. The 27 hepatic adenomas (HAs) and 23 cases of focal nodular hyperplasia (FNH) were studied with ultrasonography (US) and dynamic computed tomography (CT). Angiography was performed in 26 cases (15 HAs, 11 FNHs); scintigraphy was not used because of its cost. US scans proved nonspecific. CT scans demonstrated hemorrhage in five HAs and were useful in characterizing tumoral vascularity and any intratumoral features such as necrosis or central fibrous scar. The presence of arterial vessels (five patients) in the projection of this central fibrous scar is suggestive of FNH. Dynamic CT scans did not show the type of tumor in most cases. In cases with lesions greater than 3 cm for which doubt as to the diagnosis persists, combined use of morphologic data, scintigraphy, dynamic CT scanning, and angiography can guide the therapeutic decision: surgery or follow-up CT study after use of oral contraceptives is stopped.

Adenoma↗
PubMed1986

Periportal tuberculous adenitis: CT features.

The computed tomographic (CT) findings in six patients with periportal tuberculous adenitis were reviewed retrospectively to analyze the main morphologic features of the disease. In all patients, hypodense lymph nodes were observed close to the porta hepatis, with peripheral enhancement seen after administration of contrast material. In one patient, this hypodense adenopathy was associated with homogeneous, normally enhancing lymph nodes. These different features on the CT scans could signify the evolving pathologic stages of the disease, with early noncaseating granulomas and subsequent caseation necrosis. Recognition of these hypodense lymph nodes, especially in patients at risk, should help optimize the correct diagnosis of periportal tuberculous adenitis.

Adult↗
PubMed1986

CT features of cardio-pericardial masses.

The results of dynamic computed tomography (CT) in 13 patients with intracardiac filling defects and one with a pericardial lipoma are presented. The intracardiac filling defects were due to thrombus in five cases, myxoma in three, hydatid cysts in three, haemangiopericytoma in one and sarcoma in one. These kinds of lesions are well identified by CT which seems to be superior to echocardiography in the characterisation of the components and in the evaluation of the malignant spreading masses.

Adult↗
PubMed1985

Portal thrombosis: dynamic CT features and course.

Portal thrombosis was diagnosed on computed tomography (CT) in 10 patients and confirmed by sonography. CT demonstrated decreased density of the portal vessels in 9 patients with peripheral arterial concentration of contrast material surrounding the intraluminal thrombus. In 1 patient, a fresh thrombus was seen as an increase in intraluminal density on the pre-contrast scan. The involved vessels were generally enlarged. Three patients had follow-up scans, which revealed a cavernoma in 2 and complete patency of the portal vein and its branches following anticoagulant therapy in 1. In the latter patient, localized abnormal intra-hepatic blood flow suggested infarction of portal origin as the result of clot migration.

Adult↗
PubMed1985

Portal cavernoma: dynamic CT features and transient differences in hepatic attenuation.

Sixteen portal cavernomas were examined with dynamic computed tomography (CT) and confirmed by sonography. Characteristic features included loss of the normal vascular structure and the presence of sinuous collateral pathways which were enhanced during the portal phase. Fifteen patients exhibited transient differences in hepatic attenuation and peripheral arterial concentration of contrast material. Increased arterial flow in the poorly perfused territories is suggested as a cause of these hemokinetic abnormalities.

Adult↗
PubMed1985

Dynamic CT features of hepatic abscesses.

Forty hepatic abscesses were examined with dynamic computed tomography (CT). A "double target sign," consisting of a hypodense central area surrounded by first a hyperdense ring and then a hypodense zone, seems to be highly suggestive of abscess formation. In 12 cases, the hepatic parenchyma surrounding the lesion demonstrated transient hyperdensity after contrast injection, possibly due to localized hepatic venous obstruction secondary to acute hepatic inflammation. This is similar to the appearance of an arterioportal fistula.

Adult↗