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Related Experiment Videos

Pressure-controlled versus volume-controlled ventilation: does it matter?

Robert S Campbell1, Bradley R Davis

  • 1Department of Surgery, Division of Trauma/Critical Care, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA. robert.campbell@uc.edu

Respiratory Care
|April 4, 2002
PubMed
Summary
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Volume-controlled ventilation (VCV) and pressure-controlled ventilation (PCV) are control variables, not modes. PCV may offer benefits for spontaneous breathing patients, but VCV is often sufficient, especially with decelerating flow.

Area of Science:

  • Critical Care Medicine
  • Respiratory Physiology

Background:

  • The choice between volume-controlled ventilation (VCV) and pressure-controlled ventilation (PCV) remains a topic of debate.
  • Understanding the differences in control variables is crucial for optimizing mechanical ventilation.

Purpose of the Study:

  • To clarify the distinctions between VCV and PCV as control variables.
  • To evaluate the comparative benefits and drawbacks of VCV and PCV in mechanical ventilation.

Main Methods:

  • Review of existing literature comparing VCV and PCV.
  • Analysis of the physiological implications of each control variable.

Main Results:

  • VCV ensures pre-set tidal and minute ventilation but requires careful setting of inspiratory parameters and can lead to high airway pressures.

Related Experiment Videos

  • PCV limits peak airway pressure but may result in variable tidal volumes; its benefits may stem from decelerating flow waveforms.
  • Dual-control modes combine features of both VCV and PCV.

    • Conclusions:

    • PCV offers no clear advantage over VCV in non-spontaneously breathing patients, particularly when decelerating flow is available.
    • PCV may improve patient comfort and reduce work of breathing in those with high or variable respiratory demands.