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Related Experiment Videos

The prone position in ARDS patients. A clinical study.

M Langer1, D Mascheroni, R Marcolin

  • 1Istituto di Anestesiologia e Rianimazione, Università di Milano, Italy.

Chest
|July 1, 1988
PubMed
Summary

Prone positioning improved arterial oxygenation in most moderate-to-severe Acute Respiratory Distress Syndrome (ARDS) patients. A short prone trial can identify patients who benefit from this treatment to enhance oxygenation.

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Area of Science:

  • Critical Care Medicine
  • Respiratory Physiology
  • Radiology

Background:

  • Acute Respiratory Distress Syndrome (ARDS) is characterized by severe hypoxemia.
  • Prone positioning is a therapeutic maneuver used to improve oxygenation in ARDS.
  • The effectiveness and patient selection for prone positioning require further investigation.

Purpose of the Study:

  • To evaluate the effects of prone positioning on gas exchange and hemodynamics in ARDS patients.
  • To identify predictors of response to prone positioning.
  • To assess changes in lung density distribution using computed tomography.

Main Methods:

  • Gas exchange and hemodynamics were measured before, during, and after a 2-hour prone period in 13 ARDS patients.
  • Lung CT scans were performed in supine and prone positions in two patients.

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  • Patients were classified as responders or non-responders based on a 30-minute PaO2 improvement criterion.

    • Main Results:

    • Average arterial oxygenation significantly improved after prone positioning (p < 0.01).
    • Eight patients (responders) showed a significant PaO2 increase, while five (non-responders) did not.
    • CT scans revealed redistribution of lung densities with prone positioning.

    Conclusions:

    • A brief prone positioning trial can help identify ARDS patients likely to benefit from this intervention.
    • Prone positioning appears to alter lung density patterns.
    • The precise mechanisms underlying oxygenation improvement require further study.