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Related Experiment Videos

Assisted circulation by phasic external lower body compression

H A Heck, D B Doty

    Circulation
    |August 1, 1981
    PubMed
    Summary
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    Phasic external compression of the body aids venous circulation after right heart bypass. This method improved cardiac index and arterial pressure in patients undergoing Fontan operations, reducing the need for medications.

    Area of Science:

    • Cardiovascular Physiology
    • Surgical Support Techniques

    Background:

    • Systemic venous circulation requires support after right heart bypass procedures.
    • The Fontan operation, which involves right atrium to pulmonary artery anastomosis, presents unique circulatory challenges.

    Purpose of the Study:

    • To evaluate the efficacy of phasic external body compression as a circulatory support method.
    • To assess the impact of this technique on hemodynamic parameters in patients post-Fontan operation.

    Main Methods:

    • Experimental study involving acute right heart bypass with phasic external compression (60 mm Hg, 6-8 cycles/min).
    • Clinical trial in nine patients undergoing Fontan operations using phasic external compression (45-50 mm Hg, 45s on, 15s off per minute).

    Main Results:

    Related Experiment Videos

    • Experimental compression increased right atrial pressure by 44% and cardiac index by 21%.
    • In clinical trials, compression raised right atrial pressure by 44% and systolic arterial pressure by 30%.
    • Only two patients required inotropic medications post-surgery; others received minimal or no vasoactive drugs.

    Conclusions:

    • Phasic external compression of the lower body is a simple and effective method for circulatory assistance.
    • This technique shows promise in improving hemodynamic stability after Fontan operations.