Technical Aspects of Patient-Ventilator Interactions

  • R. M. Kacmarek
  • H. Cohen
  • R. L. Goulet
Conference paper


It has become increasingly clear that during patient-initiated volume-limited mechanical ventilatory assistance numerous factors can affect patient synchrony with the mechanical ventilator, the two most important being inspiratory trigger sensitivity and peak inspiratory flow. Decreasing inspiratory trigger sensitivity requires a greater system pressure change resulting in greater patient effort to initiate a mechanical breath [1, 2]. This greater effort reflects an increase in ventilatory drive, for there is good correlation between mouth occlusion pressure (P 0.1) and the pressure required to trigger a mechanical breath [3]. In addition, Gurevitch and Gelmont [4] recently noted an increased delay in establishing system pressure during mechanical volume-limited breaths as trigger sensitivity is decreased.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • R. M. Kacmarek
  • H. Cohen
  • R. L. Goulet

There are no affiliations available

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