Effect of pressure support ventilation on breathing patterns and respiratory work

H. Tokioka; S. Saito; F. Kosaka

doi:10.1007/BF00273558

Effect of pressure support ventilation on breathing patterns and respiratory work

H. Tokioka, S. Saito, F. Kosaka

Research output: Contribution to journal › Article

47 Citations (Scopus)

Abstract

We assessed the effect of pressure support ventilation (PSV) on breathing patterns and the work of breathing in 10 postoperative patients. Minute ventilation ( {Mathematical expression}_E) increased by 8% with 5 cm H₂O PSV and 10% with 10 cm H₂O PSV compared to 0 cm H₂O PSV. The increase in {Mathematical expression}_E was achieved by increased mean inspiratory flow (24% with 5 cm H₂O PSV and 67% with 10 cm H₂O PSV) and a decrease in duty cycle (13% with 5 cm H₂O PSV and 39% with 10 cm H₂O PSV). The decrease in duty cycle along with a decrease in respiratory frequency allowed a greater expiratory time including a rest period for the respiratory muscles, which might minimize the risk of muscle fatigue. Furthermore, the inspiratory work added by the ventilator was near zero with 5 cm H₂O PSV and 10 cm H₂O PSV. Oxygen consumption also decreased significantly with 5 cm H₂O PSV. We conclude that PSV improves the breathing patterns and minimizes the work of breathing spontaneously via a ventilator.

Original language	English
Pages (from-to)	491-494
Number of pages	4
Journal	Intensive Care Medicine
Volume	15
Issue number	8
DOIs	https://doi.org/10.1007/BF00273558
Publication status	Published - Dec 1 1989

Keywords

Breathing pattern
Pressure support ventilation
Work of breathing

ASJC Scopus subject areas

Critical Care and Intensive Care Medicine

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10.1007/BF00273558

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Tokioka, H., Saito, S., & Kosaka, F. (1989). Effect of pressure support ventilation on breathing patterns and respiratory work. Intensive Care Medicine, 15(8), 491-494. https://doi.org/10.1007/BF00273558

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abstract = "We assessed the effect of pressure support ventilation (PSV) on breathing patterns and the work of breathing in 10 postoperative patients. Minute ventilation ( {Mathematical expression}E) increased by 8% with 5 cm H2O PSV and 10% with 10 cm H2O PSV compared to 0 cm H2O PSV. The increase in {Mathematical expression}E was achieved by increased mean inspiratory flow (24% with 5 cm H2O PSV and 67% with 10 cm H2O PSV) and a decrease in duty cycle (13% with 5 cm H2O PSV and 39% with 10 cm H2O PSV). The decrease in duty cycle along with a decrease in respiratory frequency allowed a greater expiratory time including a rest period for the respiratory muscles, which might minimize the risk of muscle fatigue. Furthermore, the inspiratory work added by the ventilator was near zero with 5 cm H2O PSV and 10 cm H2O PSV. Oxygen consumption also decreased significantly with 5 cm H2O PSV. We conclude that PSV improves the breathing patterns and minimizes the work of breathing spontaneously via a ventilator.",

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