Summary
The insulin secretion in the peripheral venous blood and the portal venous blood were measured during 14 oral glucose tolerance tests (OGT) and 12 glucose infusion tests (GIT), in 19 patients after intraabdominal operations. 8 OGTs and 6 GITs were carried out on the 6th reap. 7th postoperative day, whilst 6 OGTs and GITs were carried out 12 days after the operation. The following conclusions can be drawn:
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1.
After intraabdominal operation the glucose tolerance is still considerably less on the 7th postoperative day.
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2.
The insulin concentrations in the peripheral venous blood are nearly identical on the 6th/7th and the 12th postoperative day.
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3.
Contrary to this, clear differences were measured in the portal venous blood. During the OGTs the insulin concentrations in the early postoperative period - 7th postoperative day -are higher than in the later postoperative period -12th postoperative day. The insulin concentration during the GITs on the other hand are lower in the early postoperative period than later postoperatively.
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4.
It is discussed, whether the influence of enteral factors as well as an increased permeability of the liver for the instantly resorbed glucose - the result is an increased hyperglycemical stimulus for the insular cell apparatus - is the cause for the high plasma insulin level after oral glucose application.
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5.
Because the glucose tolerance is diminished inspite of high insulin level during oral glucose application, the enlargement of the glucose pool by glycogenolysis and gluconeogenesis in the early postoperative period must be accepted as the most probable cause.
Zusammenfassung
Die Insulinsekretion im peripheren Venenblut und Pfortaderblut wurden während 14 oraler Glukosebelastungstests (OGT) und 12 Glukoseinfusionstests (GIT) bei 19 Patienten nach intraabdominellen Operationen gemessen. 8 OGTs und 6 GITs wurden am 6. bzw. 7. postoperativen Tag durchgeführt, während jeweils 6 OGTs und GITs 12 Tage nach der Operation erfolgten. Folgende Schlußfolgerungen werden gezogen:
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1.
Nach intraabdominellen Operationen ist die Glukosetoleranz noch am 7. postoperativen Tag wesentlich gemindert.
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2.
Die Insulinkonzentrationen im peripher venösen Blut sind am 6./7. postoperativen Tag und am 12. postoperativen Tag nahezu identisch.
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3.
Im Gegensatz dazu werden im Pfortaderblut deutliche Unterschiede gemessen. Während der OGTa sind die Ineulinkonzentrationen früher postoperativ (7. postoperativer Tag) höher als später postoperativ (12. postoperativer Tag). Umgekehrt sind die Insulinkonzentrationen während der GITs früh postoperativ niedriger als spät postoperativ.
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4.
Als Ursache der hohen Plasmainsulinspiegel nach oraler Glukosegabe wird der Einfluß enteraler Faktoren sowie eine erhöhte „Durchlässigkeit” der Leber für die unmittelbar resorbierte Glukose - Folge ist ein stärkerer hyperglykämischer Reiz für den Inselzellapparat -in der frühen postoperativen Phase diskutiert.
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5.
Da trotz hoher Insulinspiegel bei oraler Glukosegabe die Glukosetoleranz vermindert ist, muß als Ursache am ehesten die Vergrößerung des Glukosepools durch Glykogenolyse und Glukoneogenese in der frühen postoperativen Phase angenommen werden.
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Bittner, R., Beger, H.G., Kraas, E. et al. Glukosetoleranz und insulinsekretion bei oraler und intravenöser glukosebelastung nach intraabdominellen operationen. Langenbecks Arch Chiv 338, 43–54 (1975). https://doi.org/10.1007/BF01302725
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DOI: https://doi.org/10.1007/BF01302725