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Related Experiment Videos

A clinically applicable exsanguination shock model in swine.

L W Traverso, C C Moore, F J Tillman

    Circulatory Shock
    |January 1, 1984
    PubMed
    Summary

    Researchers developed a porcine hemorrhage model to study rapid exsanguination treatments. A 60% blood volume loss from the distal aorta in 15 minutes reliably caused mortality in conscious, unheparinized swine.

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    Area of Science:

    • Veterinary Medicine
    • Trauma Research
    • Surgical Models

    Background:

    • Rapid exsanguination is a leading cause of death in trauma and combat casualties.
    • Existing animal models may not accurately replicate the physiological conditions of severe hemorrhage.

    Purpose of the Study:

    • To establish a reliable and reproducible porcine model of rapid, fatal exsanguination.
    • To evaluate factors influencing mortality in a hemorrhage model.

    Main Methods:

    • Immature female swine underwent catheter placement followed by hemorrhage of 60% estimated blood volume (EBV).
    • Bleeding times (15-120 min) and catheter positions (carotid vs. distal aorta) were varied.
    • Arterial base excess (BE) and hematocrit (Hct) were monitored.

    Main Results:

    • Distal aorta catheterization allowed for 60% EBV removal in 15 min, achieving 100% mortality.
    • Carotid catheter placement led to artifactual mortality due to obstruction of contralateral blood flow.
    • Significant differences in BE were observed between survivors and nonsurvivors.

    Conclusions:

    • A standardized, conscious, unheparinized porcine model for rapid exsanguination was developed.
    • Hemorrhage from the distal aorta at a rate of 2.65 ml/kg/min is critical for achieving 100% mortality.
    • This model is suitable for evaluating treatments for rapid exsanguination in trauma care.

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