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Biomedical subjects

F Frasson

Publications and source records attributed to F Frasson.

At least 19 recordsLinked to original sources
PubMed1979

[The distal spleno-renal anastomosis of Warren (author's transl)].

This is a report on 28 Warren-Shunts, 17 of these patients had undergone clinical, hematological and angiographic controls 2--46 (mean 10) months after the operation. The critical evaluation of the results shows that the Warren derivation, which is selective at the moment of operation, develops in the following time some hepatofugal circulation. This is a more radical effect than the intended drainage of the gastro-esophageal venous bed alone.

Adult↗
PubMed1978

[Distal termino-lateral spleno-renal anastomosis, using the Warren technic].

The authors describe 23 cases of distal splenorenal derivation after Warren. Of these patients, 17 received a complete followup clinical hematological and angiographic examination at an average remove of 10 months after surgery. The authors discuss their results and submit that the Warren operation, while really selcetive in most cases when performed, in the long run tends to shung rather too much blood away from the liver; in other words, the effectiveness of the shunt tends to exceed the intended drainage,which should be restricted to the gastro-esophageal vascular bed.

Adult↗
PubMed1978

Selective arterial embolization in renal tumors.

Selective arterial embolization with Gelfoam was performed in 45 cases of hypernephroma. In 33 cases this technique has been utilized as preoperative procedure and almost always (97%) nephrectomy was facilitated: 97% of the cases had slight or moderate operative bleeding; in 82% of the cases separation of the tumor-containing kidney from adjacent tissues was easy. Embolization has been employed in 12 inoperable patients and was effective mainly in management of bleeding. Angiographic controls after embolization (from 13 to 162 days) were performed 8 times and it was assessed that the efficacy of the procedure on primary tumor growth is limited in time by renal artery revascularization. The embolized patients never presented severe complications, except several episodes of transitory renal failure.

Adenocarcinoma↗
PubMed1978

Angiography in chronic pancreatitis and pancreatic cancer. A critical evaluation.

A critical "blind" evaluation of 129 randomly selected angiographic examinations was carried out including 37 control patients, 58 patients affected by proven chronic relapsing pancreatitis and 34 patients with cancer of the pancreas. In 48.5% of the control patients a completely normal angiographic picture was found. The false positives were found in 10.8% of chronic pancreatitis and in pancreatic carcinoma in 5.5% of the cases. Equivocal signs were found in 35.2%. The percentage of the false negative results in chronic pancreatitis was 34.4% (of which 8.6% were suggestive of pancreatic cancer). In pancreatic cancer positive results were seen in 70.6% of the cases. The percentage of the false negatives was 26.5% (suggestive of chronic pancreatitis); equivocal signs were found in 2.9% of these patients. Notwithstanding the not-negligible percentage of errors, angiography can be usefully employed in diagnosis of pancreatic disorders.

Adult↗
PubMed1977

Angiographic diagnosis of endocrine tumors of the pancreas.

The angiographic findings in 18 patients with endocrine tumors of the pancreas are analyzed. A literature review (262 cases) is performed in order to assess the accuracy of angiography in diagnosing islet cell tumors, in particular multiple and small (less than 1 cm) lesions. Problems of differential diagnosis of pancreatic and extrapancreatic structures and lesions are discussed.

Adenocarcinoma↗
PubMed1977

Critical evaluation of renal masses' angiography.

152 consecutive space occupying renal lesions (54 cancers, 66 single or multiple cysts, 18 pseudotumors, 8 inflammatory lesions, 3 hydronephroses, 3 hehatomas) were studied by selective angiography, considering the signs noted in the three phases: arterial, nephrographic, and venous. The frequency of each of these angiographic signs in the different forms of renal pathology was evaluated. Based on this study, pathognomonic angiographic signs were identified for the various types of pathology. For each angiographic sign the 'diagnostic value' was calculated in order to differentiate malignant from benign space-occupying lesions. Dependent on the angiographic phase they are in, these signs constitute the arterial, nephrographic, and venous 'symptom constellation' characteristic of each lesion. The relationship between angiographic signs and either histologic type or size of tumor were analyzed. The causes of false positives and false negatives were investigated. The value of certain angiographic signs for a correct diagnosis of the cases judged as suspect or misinterpreted was discussed.

Angiography↗
PubMed1976

[Angiographic signs of the small intestine (two cases) (author's transl)].

The authors describe 2 cases of ileal carcinoid. They evaluate the advantages of selective angiography over the traditional radiologic methods, considering their cases and the 39 found in the literature. The angiographic signs of the lesions localized to the bowel wall are rather scarse and non-specific. The signs of mesenteric infiltration, which is precocious and conspicuous in this type of tumour, are more significant. Liver metastases, which are very frequent, are hypervascularized. The angiographic pattern may be similar to that found in some inflammatory diseases, but can be differentiated from that of other neoplasms of the small intestine.

Adult↗
PubMed1976

[Morpho-functional changes of left ventricle produced by sublingual nitroglycerin (author's transl)].

Two successive left ventriculargraphs [in basal conditions and after Nitroglycerin (TNG)] were performed with the same technical procedures in 20 patients before coronary arteriography. End-diastolic and end-systolic volumes and ejection fraction were studied following Greene's modified method. Diastolic and systolic ventricular projected images were divided into four zones and their variations were evaluated after TNG. Two patients did not show any significant abnormality (pseudoangor); two others suffered from cardiomyopathy (myocardosis) with mitral regurgitation and no coronary artery disease; two had restrictive cardiomyopathy. Fourteen had a coronary artery disease: seven of them had signs of end-systolic mitral regurgitation. End-diastolic and end-systolic volumes decreased and ejection fraction increased after TNG in all of these cases except in the two suffering from cardiomyopathy (ESV increased and EF decreased). Mitral regurgitation disappeared in all of them. In patients with coronary artery disease and mitral regurgitation the volume variations were slighter, and the increase of EF was larger than in the other cases. Finally, a decrease in asynergic and hypokinetc zones was observed, whereas no variations were seen in diskinetic zones. TNG can improve left ventricular kinetics by decreasing the pre-load, the after-load and myocardial oxygen consumption. Demonstration of this improvement could be of prognostic value.

Administration, Oral↗
PubMed1976

Prinzmetal's variant angina: clinical, angiographic and pathologic correlations in two typical cases.

ECG and cinecoronary angiography of two patients with Prinzmetal's variant angina are reported. A pathologic study was performed on both. In one case, a transient luminal obstruction of the left circumflex coronary artery became apparent during selective coronary arteriography. Histologic examination of the corresponding coronary segment revealed a severe concentric atherosclerotic process with a normal-sized muscular layer, so that the angiographic transient occlusion might be attributed to an arterial spasm. In the second case no angiographic narrowings were demonstrated by cinecoronary angiography. Nevertheless, histologic examination revealed significant obstructive atherosclerotic narrowing in some coronary segments. It is suggested that atherosclerotic disease may be present also in cases with variant angina who have apparently normal coronary angiograms.

Autopsy↗