Alterations in the circulatory system of anaesthesized dogs following administration of histamine and histamine H1- and H2-Receptor antagonists in relation to plasma histamine levels.
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Biomedical subjects
Publications and source records attributed to M Thermann.
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Heterotopic auxiliary liver transplantations were performed in rats using the method of Hess et. al. [6]. Oxygen pressure of liver tissue was measured with a Pt-surface electrode of Kessler and Lübbers [10]. After ligation of the hepatic artery, liver tissue PO2 decreased and remained low during further preparation. Only two of the seven lobes of the rat liver (= 30% of the parenchyma) were used as a graft. After revascularization and application of a gelatine plasma substitute, tissue PO2 of the graft increased to values of normal rat liver, although the graft was supplied with portal blood only. We suggest that one reason for this is the increase of portal perfusion rate, for the whole amount of portal blood perfuses only 30% of liver parenchyma. In the first month after transplantation PO2 of the graft parenchyma was low, but increased continually in the following months, reaching PO2 values of normal rat livers after 1 year.
After rapid gelatin infusion in many cases a release of relatively small amounts of histamine was observed. Clinical symptoms occured in 5 cases in correspondence to the increased histamine levels, but were relatively harmless. The application of dextran 60 induced anaphylactoid reactions in 2 persons, with death in one case. Plasma histamine level were normal in both cases. Histamine release probably is not the cause of dextrn induced anaphylactoid reactions.
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