Abstract
The intraoperative measurement of the afferent circulation of the liver, namely the hepatic artery flow and portal venous flow was carried out upon 14 anesthetized patients having carcinoma in the splanchnic area, mainly in the head of the pancreas by means of transit time ultrasonic volume flowmeter. The hepatic artery flow, portal venous flow and total hepatic flow were 0.377±0.10; 0.614±0.21; 0.992±0.276 l/min respectively. The ratio of hepatic arterical flow to portal venous flow was 0.66±0.259 There was a sharp, significant increase in hepatic arterial flow (29.8±6.1%, p<0,01) after the temporary occlusion of the portal vein, while the temporary occlusion of hepatic artery did not have any significant effect on portal venous circulation. The interaction between hepatic arterial flow and portal venous flow is a much disputed question, but according to the presented data here, it is unquestionable, that the decrease of portal venous flow immediately results a significant increase in hepatic artery circulation.
Highlights
IntroductionThe interaction between hepatic arterial flow and portal venous flow is a much disputed question, but according to the presented data here, it is unquestionable, that the decrease of portal venous flow immediately results a significant increase in hepatic artery circulation
The ratio of hepatic arterical flow to portal venous flow was 0.66+0.259 There was a sharp, significant increase in hepatic arterial flow (29.8+6.1%, p
The ratios of hepatic artery flow (HAF) to portal venous flow (PVF), HAF to THBF and PVF to THBF are shown in Figure 2. and there values are as follows: 0.66+0.259 0.38+0.084, 0.61+0.085 respectively
Summary
The interaction between hepatic arterial flow and portal venous flow is a much disputed question, but according to the presented data here, it is unquestionable, that the decrease of portal venous flow immediately results a significant increase in hepatic artery circulation. Numerous methods are known for the measurement of hepatic blood flow in experimental animals and humans, but most techniques have several weak points[2]. In clinical practice the most commonly used method for the measurement of afferent circulation of the liver is an electromagnetic flowmeter. The data gained by the electromagnetic flowmeter indicate, that the measurement of portal venous flow may not be precise[9]. Cently been introduced to experimental and later on to clinical practice and the measurement of arterial and venous blood flow has been reported in experimental animals with high reproducibility and stability
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