Imre Benyó

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The effect of intraduodenal administration of 0.3 ml/100 g 0.1 N hydrochloric acid and of the i.v. injection of 0.3 U/100 g secretin on the regional circulation was investigated in rats with the radioactive microsphere method. Intraduodenal acid produced a threefold increase in duodenal blood flow, jejunal perfusion was doubled, the perfusion of pancreas(More)
The influence of acidification of the duodenal contents, of intravenous secretin, cholecystokinin and pancreozym injections on hepatic (HAF) and left gastric artery (GAF) and on portal vein blood flow (PVF), bile and pancreatic juice output was studied in dogs. Acid introduction into the duodenum increased HAF and PVF by 20 and 25 percent, respectively. GAF(More)
Fifteen patients with rectal adenocarcinoma were endoscopically biopsied and given short-term [5 fluorouracil (5FU) (600 mg/m2) and Ca-Folinate (60 mg/m2) for two days] cytostatic therapy. Seven days later the tumor was resected or a second biopsy was performed. Apoptotic and mitotic indices were determined in the tumor tissue before and after the(More)
Blood flow in the portal vein and the left gastric artery was measured electromagnetically and gastric mucosal perfusion was determined by pertechnetate clearance in anaesthetized dogs. Bleeding the animals to arterial pressures of 100 and 60 mmHg respectively reduced portal venous flow and markedly increased the mesenteric inflow resistance. Left gastric(More)
In dogs anaesthetized with pentobarbital hepatic blood flow measured with electromagnetic flowmeters placed on the hepatic artery and the portal vein was 142 +/- 10.2 ml.min(-1).100 g(-1). The flow estimated with the hydrogen clearance technique was 64 +/- 4.4 per cent, with the Xe133 wash-out technique 78 +/- 7.4 per cent and by the uptake of colloidal(More)
Acidifying the duodenal contents with 0.1 N hydrochloric acid in the dog increased both hepatic artery and portal vein flow, and reduced mesenteric vascular resistance as well as hepatic artery and portal venous inflow resistances. The reaction is absent after intraduodenal injection of 30% glucose and physiological saline solutions. More concentrated acid(More)
The experiences with the surgical therapy of 31 patients treated for iatrogenic colorectal perforations during twenty years (1979-1998) are reviewed by the authors. The factors leading to perforation and applied types of operations compared with the therapeutical methods suggested by the literature are summarized. For the treatment of immediately detected(More)