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- W1982188259 abstract "Abstract The dose-related responses of the hepatic arterial and portal venous vascular beds to bolus administration of noradrenaline (10−10−10−4mol), injected into the hepatic artery and portal vein, were studied in the isolated dual-perfused rabbit liver at both basal and raised tone. The transhepatic ratio, defined as the ratio between the intra-arterial molar ED50 dose and the intraportal dose required to give the same arterial response, was calculated for arterial and venous responses to noradrenaline. At basal tone, the transhepatic ratio for hepatic arterial vasoconstrictive responses was 500. Portal venous vasoconstrictive responses were similar in potency independent of injection site but differed significantly in analysis of dose-response slope and maximal response. At raised tone, the arterio-portal pressure gradient increased by 68·5 mmHg and there was a 10-fold increase in the transhepatic ratio for hepatic arterial responses, while the portal venous responses remained unchanged. These results demonstrate that arterio-portal pressure gradient has a powerful effect on transhepatic action of noradrenaline, and suggest a pre-sinusoidal site for the generation of both hepatic arterial and portal venous vascular resistance." @default.
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- W1982188259 date "1995-04-01" @default.
- W1982188259 modified "2023-10-16" @default.
- W1982188259 title "The Transhepatic Response to Noradrenaline in the Rabbit Liver: the Influence of Arterioportal Pressure Gradient" @default.
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- W1982188259 doi "https://doi.org/10.1111/j.2042-7158.1995.tb05802.x" @default.
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