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Biomedical subjects

M Bazzocchi

Publications and source records attributed to M Bazzocchi.

At least 73 records · Page 4Linked to original sources
PubMed1985

[Clinical control of the quality of dynamic echography].

The performances of 4 real-time scanners (2 mechanical sector scanners and 2 linear electronic scanners) have been tested. The clinical test used was the examination of liver, gallbladder and biliary tract and in other circumstances the examination of kidney and breast. The quality of the scanners has been judged on the ground of four parameters: the diagnostic quality of the image (DQI) the overall quality of the image (OQI), the efficiency of the exploration (EE) and feasibility of use (FU). The ideal conditions of use for each technology are described and the authors emphasize the impact of improved technology on the quality of the ultrasonographic scanners.

Gallbladder Diseases↗
PubMed1984

The role of ultrasonography in the diagnosis of tumours of the renal pelvis.

The authors have evaluated 22 patients with renal pelvis tumour (RPT) by means of excretory urography and ultrasonography. Six patients also underwent arteriography. The value of the three investigations in the diagnosis of the lesion, the nature, the pyelic origin and the extension are presented. It is concluded that urography remains the method of choice for the evaluation of RPT while ultrasonography may be considered complementary to urography in cases of non-functioning kidney, when the urographic filling device defect is uncertain and in the differentiation between the pyelic or parenchymal origin of the tumour.

Angiography↗
PubMed1983

Ultrasonography in the diagnosis of hydronephrosis in patients with normal renal function.

In order to define the sensitivity and specificity of ultrasonography (US) in the diagnosis of hydronephrosis, 125 patients with normal renal function were examined after urography using high-resolution real-time scanning. The overall diagnostic accuracy of US in detecting hydronephrosis was 85.2%, with a specificity of 84.4% and a sensitivity of 89.9%. It is concluded that US may be considered the screening test of choice for the diagnosis of hydronephrosis. However, urography is still required for the evaluation of renal function, site, and nature of the obstruction when US shows a dilated collecting system and in the patient with a normal US but renal colic.

Diagnostic Errors↗
PubMed1982

Ultrasonographic patterns in hepatic hemangiomas.

Twenty-one cases of hepatic hemangioma were examined by ultrasound, and three main sonographic patterns were identified. In 14 cases hyperechoic focal areas were observed, in five cases larger hemangiomas exhibited a complex pattern, and in two cases hemangiomas appeared as rounded sonolucent areas with distal enhancement mimicking cysts. Hemangiomas may have significantly variable ultrasonographic features. According to the authors' experience, only in cases of hyperechoic well-defined lesions in asymptomatic patients can a definite diagnosis of hemangioma be made.

Adult↗
PubMed1982

Pancreatic cystadenocarcinoma: diagnostic problems.

Eleven cases of pancreatic cystadenocarcinoma were studied with respect to the differential diagnosis from that of pancreatic pseudocysts, using diagnostic ultrasound as the initial investigative technique. Most of the cases presented an ultrasonic picture that correlated well with the gross pathology, but this correlation was not reliable enough to be considered characteristic in differentiating such masses from pseudocysts. The authors divide the cystadenocarcinomas of the pancreas into four echographic classes. In all but one of the classes, diagnostic ultrasound was insufficient by itself to render an accurate diagnosis. In such cases other techniques, i.e. CT, tissue biopsy, and especially angiography, were required for a reliable diagnosis.

Adult↗
PubMed1982

Grey-scale ultrasonography in the evaluation of primary carcinomas of the bile ducts.

The authors report the echographic findings observed in 24 proven cases of primary carcinoma of the bile ducts. Most tumours, either vegetating or infiltrating with extraductile extension, were recognized on ultrasound. This technique turned out to be accurate in detecting peripheral, hilar and distal ductal carcinomas. Ultrasonography complements PTC and ERCP. Their combined use allows the surgeon a better selection of the cases and of the proper operative procedure.

Adenoma, Bile Duct↗
PubMed1982

Ultrasonographic aspects of inflammatory and neoplastic diseases of the gallbladder.

The authors present the incidence of the typical ultrasonographic signs of acute cholecystitis (46 cases), chronic cholecystitis (25 cases), cholecystosis (9 cases), empyema (28 cases) and carcinoma of the gallbladder (30 cases). Ultrasonography, together with the clinical picture, enables the identification of the lesion, its extension and evolution in most of the cases. Rarely do differential diagnostic problems exist. The ultrasonographic follow-up examination has been useful in acute inflammatory diseases to evaluate the efficiency of medical therapy and to detect complications which require immediate surgery. The authors emphasize the value of high-resolution real-time technique.

Adult↗
PubMed1982

Combined use of ultrasonography and transhepatic percutaneous cholangiography in obstructive jaundice.

The authors have evaluated the results of ultrasonography (US) and transhepatic percutaneous cholangiography (PTC) in 85 patients. The comparative results of US and PTC in the diagnosis of the level (proximal or distal) and the nature (benign or malignant) of the obstruction and in the evaluation of the extension and the site of the lesion are illustrated. PTC is superior in the evaluation of the level and the nature of the obstruction while US gives more information about extension and site of the lesion. It is concluded that US and PTC should be considered as two complementary modalities.

Cholangiography↗
PubMed1981

[Ultrasonographic evaluation of jaundiced patients: accuracy in 246 controlled cases (author's transl)].

In 246 controlled jaundiced patients, the value of ultrasonography was confirmed. The differentiation of medical from surgical jaundice was 96% accurate. There was an increase in the overall accuracy due to technological developments and better scanning techniques. Nevertheless important diagnostic problems are still unresolved. Although the precise location of the obstructing lesion was determined in 86% of surgical case, the cause was established in only 69%. In medical jaundice diagnostic findings were observed only in congestive liver due to chronic heart failure and in some cases of cirrhosis.

Bile Duct Neoplasms↗
PubMed1980

Grey-scale ultrasonography in the evaluation of carcinoma of the gall bladder.

Ultrasonography was used to evaluate 18 proven cases of carcinoma of the gall-bladder and a prospective diagnosis was correctly achieved in 88.8%. The ultrasonographic findings may be classified into primary and associated. The diagnostic role of ultrasonography is considered and a flow-chart of further investigations is suggested. The diagnostic limits for early detection are underlined.

Aged↗
PubMed1980

[The diagnosis of hepatic metastases is a frequent problem in clinical practice (author's transl)].

In 131 verified cases with known primitive tumor, the diagnostic accuracy of the echotomography resulted in 84% (sensitivity 89%; specificity 76%). Technical insufficiency of the echotomography did not define the diagnosis in 8% of the patients. The evidence of solid lesions in both lobes of the liver and the involvement of the inferior vena cava are the criteria for inoperability and selection for angiographic test. The diagnostic value of the echotomography was low in cases where the primitive tumour was not identified because of the non specificity of the echo-structure of the solid intrahepatic lesions. Angiography is essential when a liver resection is planed.

Angiography↗
PubMed1979

[Echotomography in the diagnosis of pancreatic carcinoma. Its reliability in a controlled normal and pathological series of cases].

Considering the different points of view about the echotomographic findings in pancreatic carcinoma, the authors refer their results about 89 controlled cases (38 normal pancreas and 51 pancreatic carcinomas). The pancreatic space was correctly identified as normal in 37/38 cases. Echotomography also revealed the presence of 48 pancreatic carcinomas; it gave 3 false negative and 3 false positive results; in 21 cases the size of the tumour was 5 cm or less. In a large number of cases echotomography has correctly defined the extent of the lesion by evaluating its size, the secondary liver localization (95% of accuracy) and the vascular involvement (compressions on the inferior vena cava and obstruction of the splenic vein). Basing on the echotomographic findings the authors classify the pancreatic carcinoma in 2 main types.

Carcinoma↗
PubMed1979

[Gray scale echotomography of the kidney: technique and anatomy (author's transl)].

The authors illustrate all the different scanning techniques for the kidney and review the normal anatomic patterns in every scanning plane. Using gray scale machines, high-frequency long focussed transducers and appropriate gain settings, it is possible to obtain well defined images, with high resolution; these allow to recognize the renal margins, the cortex, the medulla and the renal sinus structures. The large number of scanning planes, both longitudinal and transverse, allow a detailed evaluation of the normal renal anatomy, the relationships of the kidneys with the neighbouring structures (fasciae, ligaments, fat and vessels) and organs (liver, adrenals, spleen and pancreas) are well recognized. The authors systematically introduce the different echotomographic aspects of the normal kidney. Echotomography can also inform about the renal position and size.

Humans↗
PubMed1979

[Echographic evaluation of nontraumatic abdominal emergencies (author's transl)].

The authors illustrate the diagnostic possibilities of echography in the evaluation of the nontraumatic abdominal emergencies. They first refer about the methods of investigation and the scanning techniques. Then they illustrate the value of echography in the evaluation of the acute cholecystitis and pancreatitis pointing out the sensitivity of this procedure to the detection of the spread of the infections to the peritoneum and to the retroperitoneal spaces. The authors also present the echographic findings in the acute pathology of the retroperitoneum and of the female pelvic organs. Finally they emphasize the diagnostic value of ultrasounds in the search of the abdominal causes of the acute anemia and of the fever of unknown origin and as a preliminary investigation in case of actue renal failure.

Abdomen↗
PubMed1978

Abdominal contrast tomography in the evaluation of the gall-bladder and biliary tract (with emphasis upon jaundiced patients).

Tomography of the right upper quadrant after the rapid intravenous infusion of a high dose of contrast medium is a valuable method of investigation of hepato-biliary disease. Gall-bladder wall opacification may be normal, but if the wall is thicker than 2 mm and if irregular, it indicates inflammatory or calculous disease. Gall-bladder area greater than 35 cm2 indicates bile duct obstruction. This also causes the ducts to appear as lucent bands within the opacified liver parenchyma. Secondary deposits in the liver may also become visible. Various patterns of these findings are described which suggest specific biliary abnormalities.

Adult↗
PubMed1977

The use of abdominal contrast tomography in liver disease.

The value of a high dose infusion technique using urographic contrast medium followed by tomography was studied in 44 patients with liver disease. The method was found to be of value in showing cysts, abscesses and cystic disease of the liver. Large tumours, primary and secondary, can also be demonstrated. Normal bile ducts are not visible, but become apparent when they are dilated.

Contrast Media↗