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Reproducible determination of transpulmonary pressures.

G R A De Meyer1,2, S G Morrison1, V Saldien1,2

  • 1Antwerp University Hospital, Edegem, Belgium.

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|May 2, 2022
PubMed
Summary

This study presents a novel method for accurately measuring transpulmonary pressures during mechanical ventilation. The approach reliably extracts end-expiratory values, overcoming limitations of manual methods and signal interferences.

Keywords:
Data ExtractionFluxmedOesophageal balloon catheterRRespiratory monitor

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Area of Science:

  • Physiology
  • Mechanical Ventilation
  • Critical Care Medicine

Background:

  • Oesophageal pressure is a validated surrogate for pleural pressure, crucial for calculating transpulmonary pressure.
  • Current methods for determining transpulmonary pressure are manual, subjective, and susceptible to artifacts like cardiac oscillations and oesophageal contractions.
  • Accurate measurement of transpulmonary pressure is vital for understanding ventilatory physiology and optimizing mechanical ventilation.

Purpose of the Study:

  • To develop and validate an automated approach for extracting end-expiratory transpulmonary pressure from raw monitoring data.
  • To provide a reproducible and objective method for determining transpulmonary pressures, unaffected by common signal interferences.

Main Methods:

  • An algorithm was developed to process oesophageal pressure signals obtained from monitoring data.
  • The method focuses on extracting the end-expiratory transpulmonary pressure at a set positive end-expiratory pressure.
  • The approach is designed to disregard artifacts from cardiac motion and oesophageal disturbances.

Main Results:

  • The proposed approach reproducibly determines end-expiratory transpulmonary pressures.
  • The method provides accurate measurements at a specified level of positive end-expiratory pressure.
  • The algorithm successfully filters out cardiac oscillations and effects of surgical manipulation from the oesophageal pressure signal.

Conclusions:

  • This automated method offers a reliable and objective way to measure end-expiratory transpulmonary pressure.
  • The approach enhances the accuracy of transpulmonary pressure monitoring in mechanically ventilated patients.
  • This technique can improve the understanding and application of ventilatory physiology in clinical practice.