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Open Access 01-08-2005 | Research

Short-term effects of positive end-expiratory pressure on breathing pattern: an interventional study in adult intensive care patients

Authors: Christoph Haberthür, Josef Guttmann

Published in: Critical Care | Issue 4/2005

Abstract

Introduction

Positive end-expiratory pressure (PEEP) is used in mechanically ventilated patients to increase pulmonary volume and improve gas exchange. However, in clinical practice and with respect to adult, ventilator-dependent patients, little is known about the short-term effects of PEEP on breathing patterns.

Methods

In 30 tracheally intubated, spontaneously breathing patients, we sequentially applied PEEP to the trachea at 0, 5 and 10 cmH₂O, and then again at 5 cmH₂O for 30 s each, using the automatic tube compensation mode.

Results

Increases in PEEP were strongly associated with drops in minute ventilation (P < 0.0001) and respiratory rate (P < 0.0001). For respiratory rate, a 1 cmH₂O change in PEEP in either direction resulted in a change in rate of 0.4 breaths/min. The effects were exclusively due to changes in expiratory time. Effects began to manifest during the first breath and became fully established in the second breath for each PEEP level. Identical responses were found when PEEP levels were applied for 10 or 60 s. Post hoc analysis revealed a similar but stronger response in patients with impaired respiratory system compliance.

Conclusion

In tracheally intubated, spontaneously breathing adult patients, the level of PEEP significantly influences the resting short-term breathing pattern by selectively affecting expiratory time. These findings are best explained by the Hering–Breuer inflation/deflation reflex.

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Title: Short-term effects of positive end-expiratory pressure on breathing pattern: an interventional study in adult intensive care patients
Authors: Christoph Haberthür
Josef Guttmann
Publication date: 01-08-2005
Publisher: BioMed Central
Published in: Critical Care / Issue 4/2005
Electronic ISSN: 1364-8535
DOI: https://doi.org/10.1186/cc3735

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Short-term effects of positive end-expiratory pressure on breathing pattern: an interventional study in adult intensive care patients

Abstract

Introduction

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Introduction

Methods

Results

Conclusion

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