Search PubMed⌕ Search

Biomedical subjects

H Bismuth

Publications and source records attributed to H Bismuth.

At least 343 records · Page 19Linked to original sources
PubMed1987

[Liver transplantation in the rat. Technical considerations apropos of 247 cases].

A technique is described for orthotopic liver transplantation in the rat using polyethylene cuffs to re-establish subhepatic cava and portal vascular anastomoses. This procedure reduces the time of portal clamping, an important factor of survival. The method was employed in 247 animals during studies to evaluate allograft tolerance and rejection mechanisms in rats of pure strain.

Animals↗
PubMed1986

[Treatment of uncontrollable hemorrhage caused by esophageal varices in cirrhotics. Transhepatic embolization or emergency portal shunt].

The purpose of this study was to compare the results of two therapeutic methods used in an emergency to control oesophageal variceal bleeding resistant to medical treatment in cirrhotic patients: portal diversion (116 patients) or transhepatic embolization of the varices (84 patients). Portal diversion proved more effective in stopping the haemorrhage than embolization but the overall mortality rate was about the same with the two procedures. An analysis of the results taking into account the patient's condition failed to show any difference in mortality between the two methods. Indeed, the very high mortality rate in the most severely ill patients may oblige to question their usefulness in such cases. In the least severe patients, we prefer portal diversion which is quicker and can be performed at any time. In patients of the intermediate group transhepatic embolization seems to be less hazardous than portal diversion.

Embolization, Therapeutic↗
PubMed1986

Pancreatic debridement in acute necrotizing pancreatitis: an obsolete procedure?

Thirty-eight patients treated by pancreatic debridement for acute necrotizing pancreatitis were studied. Group 1 consisted of 12 critically ill patients who underwent early surgery. Group 2 was formed from 15 patients operated upon secondarily for supervening complications and group 3 contained 11 patients operated upon electively for gallstone pancreatitis. The operative mortality was 100, 27 and 0 per cent for groups 1, 2 and 3 respectively. Pancreatic debridement was associated with a high morbidity whether performed for complications (66 per cent) or elective biliary surgery (36 per cent). These data suggest that there is probably only limited indication for pancreatic debridement in patients with acute necrotizing pancreatitis.

Acute Disease↗
PubMed1986

Hepatitis B virus DNA in mononuclear blood cells. A frequent event in hepatitis B surface antigen-positive and -negative patients with acute and chronic liver disease.

We have investigated 38 hepatitis B surface antigen (HBsAg)-positive and 34-negative patients with acute and chronic liver disease for the presence of hepatitis B virus (HBV) DNA in peripheral mononuclear blood cells. Among the HBsAg-positive subjects HBV DNA was detected in the mononuclear cells of asymptomatic HBV carriers (2/6), patients with acute hepatitis (8/8), chronic active hepatitis (18/21), and with hepatocellular carcinoma (2/3); the viral DNA sequences were also identified in the mononuclear cells of patients with HBsAg-negative acute hepatitis (2/3), chronic active hepatitis (5/15) and hepatocellular carcinoma (5/16), some of these showing no evidence of HBV by conventional serological markers. By contrast HBV DNA was not detected after resolution of the acute viral infection. For 7 patients different mononuclear cell-enriched subpopulations were assayed and the viral DNA was observed in T lymphocytes (both OKT4+ and OKT8+ enriched subsets) and/or in B enriched lymphocytes; the restriction DNA patterns showed in some patients a genetic organisation of the viral DNA similar to those observed in the liver (including free monomeric and oligomeric HBV DNA and results consistent with integrated viral sequences); however, no HBV DNA replicative forms were detected. These results show that the hepatitis B virus infection of mononuclear blood cells (including lymphoid cells) is a frequent event at all stages of the viral infection which might be related to immunological abnormalities observed in HBV carriers; in addition the mononuclear blood cells analysis may provide an insight to the liver cells status.

B-Lymphocytes↗
PubMed1986

Utility of operative ultrasound in the surgical management of liver tumors.

In this study the utility of operative ultrasound in the surgical management of 98 consecutive patients with liver and gastrointestinal tumors was assessed. All patients had preoperative work-up including ultrasound study of the liver as well as selective hepatic arteriography (50 patients) and computerized tomography of the liver (45 patients). At surgery, inspection and palpation of the liver as well as operative ultrasound examination were performed in all cases. Fifty-six patients were known to have liver tumors before operation, while 42 patients had their liver examined as part of the treatment of a primary gastrointestinal malignancy. A total of 126 liver tumors were found in 58 patients, all of whom were confirmed histologically. Eighteen nodules unsuspected before operation were found at surgery--nine by inspection and palpation of the liver, and nine others that were nonpalpable were found by operative ultrasound only. Eighteen lesions that were missed by all diagnostic modalities were found as secondary lesions on pathologic examination of the resected specimens. In addition to diagnostic applications, operative ultrasound was useful in localizing nodules and permitting guided biopsies deep in the hepatic parenchyma. In eight cases, segmental resections were performed with operative ultrasound to localize the plane of section and to catheterize the intrahepatic portal vein branch afferent to the tumor in order to perform balloon catheter occlusion of the vessel for control of bleeding. Operative ultrasound was found to be important in the surgical management of 19 of 98 patients (19%).

Aged↗
PubMed1986

Therapeutic efficacy of the transplantation of isolated hepatocytes in rats with surgically induced acute hepatic failure: a study of the mechanism.

In this study, the beneficial effect of intrasplenic transplantation of hepatocytes or splenocytes was shown in animals with 75% hepatectomy and portacaval shunt but not in animals with total dehepatization by hepatic vascular exclusion. No enhancement of the phagocytic activity was observed in the animals with 75% hepatectomy and portacaval shunt after injection of hepatocytes or splenocytes. This study confirms the efficacy of hepatocytes for the treatment of experimental liver failure but shows that nonhepatic cells may be equally as effective. Metabolic activity of the transplanted cells and stimulation of the phagocytic activity of the reticuloendothelial system probably do not explain the therapeutic effect of the transplanted cells.

Animals↗
PubMed1986

[Presence of DNA sequences of hepatitis B virus in a fibrolamellar carcinoma of the liver].

We report the case of a twenty-one-year old woman using oral contraceptives who underwent partial hepatectomy for fibrolamellar carcinoma. Anti-HBs and anti-HBc antibodies were present in the serum and chronic hepatitis was associated with the carcinoma. Study of the tumor with DNA hybridization techniques showed the presence of integrated DNA sequences of the hepatitis B virus in the tumor cells. This observation underlines the possible interactions of different factors in hepatic carcinogenesis, and suggests that estrogens may possibly act as a cocarcinogenic factor associated with viral infection.

Adult↗
PubMed1986

[Technic for orthotopic hepatic transplantation in rats using cuffs for 3 vascular anastomoses].

A technique for orthotopic hepatic transplantation in the rat uses polyethylene cuffs to re-establish vascular and biliary continuity. Introduction of the suprahepatic cuff into the intrahepatic vena cava of the receiver rat, after partial hepatectomy, reduces the duration of vascular clamping and improves survival of grafted rats (long-term survival: 70%). This technique is simple to reproduce after several weeks of training and can allow research teams to study immunologic mechanisms of tolerance or rejection of liver allografts in the pure strain rat.

Animals↗