• Critical care medicine · Sep 1984

    Comparative Study

    High-frequency positive-pressure ventilation with the MA-1 ventilator.

    • A C Pinchak, J F Hagen, D Hancock, and C Kovijanic.
    • Crit. Care Med. 1984 Sep 1; 12 (9): 810-4.

    AbstractA conventional, low-frequency ventilator was modified to ventilate dogs at high frequencies of 85 to 185 cycle/min while cardiovascular and pulmonary variables were monitored. Although gas transport was adequate, cardiac output was diminished when compared to low-frequency ventilation. The addition of an in-line pneumotachograph markedly increased PaCO2 during high-frequency ventilation. Carbon dioxide transport was primarily dependent upon the magnitude of the tidal volume at all high frequencies tested.

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