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Related Experiment Videos

Cold-induced hypercoagulability in vitro: a trauma connection?

F J Ferraro1, C R Spillert, K G Swan

  • 1Department of Surgery, University of Medicine and Dentistry of New Jersey, New Jersey Medical School, Newark 07103.

The American Surgeon
|June 11, 1992
PubMed
Summary
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Hypothermia worsens endotoxin

Area of Science:

  • Biomedical Science
  • Trauma Research
  • Hematology

Background:

  • Coagulopathy in acute trauma increases mortality.
  • Hypothermia and injury severity are significant clinical factors.
  • Preventing coagulopathy is crucial in trauma management.

Purpose of the Study:

  • To investigate the synergistic effects of hypothermia and endotoxin on blood coagulation.
  • To determine the impact of hypothermia on endotoxin-induced coagulopathy in vitro.
  • To explore potential mechanisms contributing to coagulopathy in trauma patients.

Main Methods:

  • Human whole blood samples were collected from healthy volunteers.
  • Samples were divided into control (saline) and activated (saline plus endotoxin) groups.

Related Experiment Videos

  • Groups were subjected to normothermia (24°C) or hypothermia (0°C) for 60 minutes.
  • Recalcification times were measured using fibrin formation and viscous drag after returning samples to 37°C.

    • Main Results:

    • The activated hypothermic group exhibited significantly decreased recalcification times (345 ± 48.9 seconds) compared to the activated normothermic group (405 ± 60.8 seconds; P < 0.001).
    • No significant differences in recalcification times were observed between normothermic and hypothermic groups without endotoxin.
    • Endotoxin significantly impacted clotting times, an effect exacerbated by hypothermia.

    Conclusions:

    • Hypothermia potentiates the pro-coagulopathic effects of endotoxin in vitro.
    • The combination of endotoxin and hypothermia acts synergistically, potentially explaining coagulopathy in trauma patients.
    • Findings suggest that managing hypothermia may be critical in preventing trauma-induced coagulopathy.