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Related Experiment Videos

Patient-ventilator asynchrony.

C S Sassoon1, G T Foster

  • 1Department of Medicine, Long Beach VA Health Care System, (111P), 5901 East Seventh Street, Long Beach, CA 90822, USA. catherine.sassoon@med.va.gov

Current Opinion in Critical Care
|May 25, 2001
PubMed
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Patient-ventilator asynchrony, a mismatch in breathing timing, occurs in all partial ventilatory support modes. Understanding its causes is key to improving mechanical ventilation outcomes.

Area of Science:

  • Critical Care Medicine
  • Respiratory Physiology

Background:

  • Patient-ventilator asynchrony arises from a mismatch between neural and mechanical inspiratory times.
  • Various factors including respiratory drive, mechanics, and ventilator settings influence this interaction.
  • No current partial ventilatory support mode is entirely free from asynchrony issues.

Purpose of the Study:

  • To elucidate the fundamental mechanisms of patient-ventilator asynchrony.
  • To identify key factors contributing to asynchrony in different ventilation modes.
  • To highlight the need for further research into the prevalence and impact of asynchrony.

Main Methods:

  • Review of existing literature on patient-ventilator interaction.
  • Analysis of ventilator triggering and cycling-off mechanisms.

Related Experiment Videos

  • Examination of specific parameters in volume-cycled and pressure-support ventilation.

    • Main Results:

    • Asynchrony is fundamentally linked to timing mismatches.
    • Ventilator trigger sensitivity and post-trigger settings significantly impact patient-ventilator interaction.
    • Specific settings in assist-control and pressure support ventilation are identified as critical factors.

    Conclusions:

    • Patient-ventilator asynchrony is a complex issue inherent in current ventilatory support.
    • Further research is required to determine the prevalence and clinical impact of asynchrony on mechanical ventilation duration.