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Intermittent mandatory ventilation; is synchronization important?

T J Heenan, J B Downs, M E Douglas

    Chest
    |May 1, 1980
    PubMed
    Summary
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    Synchronizing mechanical breaths with patient breathing during intermittent mandatory ventilation (IMV) showed no significant cardiopulmonary benefits. This study found no physiological advantage to matching ventilator breaths with spontaneous breathing efforts.

    Area of Science:

    • Critical Care Medicine
    • Respiratory Physiology
    • Mechanical Ventilation

    Background:

    • Intermittent mandatory ventilation (IMV) facilitates spontaneous breathing between mechanical breaths.
    • Concerns exist regarding potential cardiovascular depression and barotrauma from nonsynchronous IMV.
    • Synchronizing mechanical breaths is technically challenging and costly.

    Purpose of the Study:

    • To investigate if synchronizing mechanical breaths with spontaneous breathing during IMV offers cardiopulmonary benefits.
    • To compare physiological effects of synchronous versus nonsynchronous IMV.

    Main Methods:

    • Utilized intermittent mandatory ventilation (IMV) in a study setting.
    • Compared cardiopulmonary function during synchronous and nonsynchronous mechanical breath delivery.

    Related Experiment Videos

  • Assessed physiological parameters related to cardiovascular function and pulmonary barotrauma.

    • Main Results:

    • The study found no significant difference in cardiopulmonary function between synchronous and nonsynchronous IMV.
    • Synchronization of mechanical breaths did not demonstrate a physiological advantage.

    Conclusions:

    • The hypothesis that synchronous IMV is physiologically beneficial was not supported.
    • Current evidence does not support the need for complex synchronization techniques in IMV based on cardiopulmonary outcomes.