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Related Experiment Videos

Preheparinization improves organ function after hemorrhage and resuscitation.

P Wang1, G Singh, M W Rana

  • 1Department of Surgery, Michigan State University, East Lansing 48824.

The American Journal of Physiology
|September 1, 1990
PubMed
Summary

Preheparinization before hemorrhage improves cardiac output and renal function in rats. This treatment also preserves hepatocellular function after resuscitation, suggesting protective effects against shock-induced organ damage.

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Area of Science:

  • Physiology
  • Pharmacology
  • Hemorrhagic Shock Research

Background:

  • Heparinization prior to hemorrhage is known to maintain microvascular patency in the liver and kidney.
  • The protective effects of preheparinization on overall organ function following hemorrhage and resuscitation remain unclear.

Purpose of the Study:

  • To investigate the impact of preheparinization on cardiac output, renal function, hepatic microvascular blood flow, and hepatocellular function after hemorrhagic shock and resuscitation.
  • To determine if heparin administration before hemorrhage offers protective benefits against organ dysfunction.

Main Methods:

  • Unanesthetized rats were subjected to controlled hemorrhagic shock and subsequently resuscitated with Ringer lactate.
  • Groups included rats with and without preheparinization.

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  • Measurements included cardiac output (CO), renal function ([3H]inulin clearance), hepatic microvascular blood flow (HMBF), and hepatocellular function (maximal velocity of indocyanine green clearance, Vmax).

    • Main Results:

    • Preheparinized rats exhibited significantly higher cardiac output compared to non-heparinized rats post-resuscitation.
    • Improvements in renal function (CIn) and hepatic microvascular blood flow (HMBF) were observed in the preheparinized group.
    • Hepatocellular function (Vmax) was significantly depressed in non-heparinized rats but maintained in preheparinized rats.

    Conclusions:

    • Preheparinization before hemorrhage significantly improves cardiac output, renal function, and hepatocellular function after resuscitation in rats.
    • These protective effects are likely attributed to the maintenance of microvascular patency and prevention of blood sludging.
    • Preheparinization represents a potential therapeutic strategy to mitigate organ damage during and after hemorrhagic shock.