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Interposed abdominal compression-CPR in human subjects.

C R Berryman, G M Phillips

    Annals of Emergency Medicine
    |April 1, 1984
    PubMed
    Summary
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    Interposed abdominal compression-CPR (IAC-CPR) significantly increases blood flow during resuscitation. This technique, applying manual abdominal pressure during chest compression release, shows promise for improving patient outcomes in cardiac arrest.

    Area of Science:

    • Cardiology
    • Emergency Medicine
    • Physiology

    Background:

    • Standard cardiopulmonary resuscitation (CPR) achieves only about 30% of normal cardiac output.
    • Enhancing blood flow during CPR is crucial for improving resuscitation success and minimizing organ damage.
    • Existing advanced methods often require specialized equipment and trained personnel.

    Purpose of the Study:

    • To evaluate the efficacy of Interposed Abdominal Compression-CPR (IAC-CPR) in increasing blood pressure and perfusion during cardiac arrest.
    • To assess the potential of IAC-CPR as an improvement over standard CPR techniques.

    Main Methods:

    • IAC-CPR involves applying manual abdominal pressure during the release phase of chest compressions.
    • Systolic and mean arterial pressures (MAP) were measured in six cardiac arrest patients.

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  • Central venous pressures (CVP) were measured in one patient to calculate mean perfusion pressure (MAP - CVP).

    • Main Results:

    • IAC-CPR demonstrated a 50% increase in mean arterial pressure (MAP) compared to standard CPR (26 to 39 mm Hg).
    • Mean perfusion pressure increased by 37% (19 to 26 mm Hg) when IAC-CPR was applied.
    • Previous animal studies showed a 100% increase in diastolic blood pressure and 75% increase in cardiac output with IAC-CPR.

    Conclusions:

    • IAC-CPR significantly enhances hemodynamic parameters during resuscitation in cardiac arrest patients.
    • The technique shows potential as a valuable improvement to basic CPR, pending further studies in resuscitated patients.
    • IAC-CPR may increase the likelihood of successful resuscitation and reduce neurological and cardiac damage.