Respiratory muscle activity and pulmonary function during acutely induced airways obstruction

Cees P. van der Schans, Wietze de Jong, Gerrie de Vries, Dirkje S. Postma, G H Koëter, T W van der Mark

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

BACKGROUND: Patients with airway obstruction may spontaneously breathe with a positive expiratory pressure by pursing their lips during expiration, especially in case of dyspnea. Dyspnea seems to be related to increased activity of the respiratory muscles. A potential explanation for the use of pursed lips breathing (PLB) is that this type of breathing leads to a reduction of respiratory muscle activity. The purpose of this study was to assess the effect of breathing with a positive expiratory pressure of 5 cm H2O, simulating pursed lips breathing (SPLB), on respiratory muscle activity and pulmonary function during induced airway obstruction.

METHODS: In twelve asthmatic patients, tonic and phasic electromyographic (EMG) activity of the following muscles was obtained: scalene muscle, parasternal muscle, and abdominal muscles. Pulmonary function and EMG measurements were performed before and after propranolol induced airway obstruction.

RESULTS: Simulated pursed lips breathing resulted in a significant increase of functional residual capacity and tidal volume both at baseline and during airway obstruction. Phasic respiratory muscle activity during PEP breathing increased especially at baseline. We conclude that beneficial effects of breathing with a positive expiratory pressure of 5 cm H2O, which is similar to pursed lips breathing, cannot be explained by changes in respiratory muscle activity or pulmonary function.

Original languageEnglish
Pages (from-to)167-77
JournalPhysiotherapy research international : the journal for researchers and clinicians in physical therapy
Volume2
Issue number3
DOIs
Publication statusPublished - 1997
Externally publishedYes

Keywords

  • airway obstruction
  • asthma
  • respiratory muscles

Cite this

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title = "Respiratory muscle activity and pulmonary function during acutely induced airways obstruction",
abstract = "BACKGROUND: Patients with airway obstruction may spontaneously breathe with a positive expiratory pressure by pursing their lips during expiration, especially in case of dyspnea. Dyspnea seems to be related to increased activity of the respiratory muscles. A potential explanation for the use of pursed lips breathing (PLB) is that this type of breathing leads to a reduction of respiratory muscle activity. The purpose of this study was to assess the effect of breathing with a positive expiratory pressure of 5 cm H2O, simulating pursed lips breathing (SPLB), on respiratory muscle activity and pulmonary function during induced airway obstruction.METHODS: In twelve asthmatic patients, tonic and phasic electromyographic (EMG) activity of the following muscles was obtained: scalene muscle, parasternal muscle, and abdominal muscles. Pulmonary function and EMG measurements were performed before and after propranolol induced airway obstruction.RESULTS: Simulated pursed lips breathing resulted in a significant increase of functional residual capacity and tidal volume both at baseline and during airway obstruction. Phasic respiratory muscle activity during PEP breathing increased especially at baseline. We conclude that beneficial effects of breathing with a positive expiratory pressure of 5 cm H2O, which is similar to pursed lips breathing, cannot be explained by changes in respiratory muscle activity or pulmonary function.",
keywords = "airway obstruction, asthma, respiratory muscles, astma, electromyografie",
author = "{van der Schans}, {Cees P.} and {de Jong}, Wietze and {de Vries}, Gerrie and Postma, {Dirkje S.} and Ko{\"e}ter, {G H} and {van der Mark}, {T W}",
year = "1997",
doi = "10.1002/pri.98",
language = "English",
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pages = "167--77",
journal = "Physiotherapy research international : the journal for researchers and clinicians in physical therapy",
issn = "1358-2267",
publisher = "John Wiley and Sons Ltd",
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}

Respiratory muscle activity and pulmonary function during acutely induced airways obstruction. / van der Schans, Cees P.; de Jong, Wietze; de Vries, Gerrie; Postma, Dirkje S.; Koëter, G H; van der Mark, T W.

In: Physiotherapy research international : the journal for researchers and clinicians in physical therapy, Vol. 2, No. 3, 1997, p. 167-77.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Respiratory muscle activity and pulmonary function during acutely induced airways obstruction

AU - van der Schans, Cees P.

AU - de Jong, Wietze

AU - de Vries, Gerrie

AU - Postma, Dirkje S.

AU - Koëter, G H

AU - van der Mark, T W

PY - 1997

Y1 - 1997

N2 - BACKGROUND: Patients with airway obstruction may spontaneously breathe with a positive expiratory pressure by pursing their lips during expiration, especially in case of dyspnea. Dyspnea seems to be related to increased activity of the respiratory muscles. A potential explanation for the use of pursed lips breathing (PLB) is that this type of breathing leads to a reduction of respiratory muscle activity. The purpose of this study was to assess the effect of breathing with a positive expiratory pressure of 5 cm H2O, simulating pursed lips breathing (SPLB), on respiratory muscle activity and pulmonary function during induced airway obstruction.METHODS: In twelve asthmatic patients, tonic and phasic electromyographic (EMG) activity of the following muscles was obtained: scalene muscle, parasternal muscle, and abdominal muscles. Pulmonary function and EMG measurements were performed before and after propranolol induced airway obstruction.RESULTS: Simulated pursed lips breathing resulted in a significant increase of functional residual capacity and tidal volume both at baseline and during airway obstruction. Phasic respiratory muscle activity during PEP breathing increased especially at baseline. We conclude that beneficial effects of breathing with a positive expiratory pressure of 5 cm H2O, which is similar to pursed lips breathing, cannot be explained by changes in respiratory muscle activity or pulmonary function.

AB - BACKGROUND: Patients with airway obstruction may spontaneously breathe with a positive expiratory pressure by pursing their lips during expiration, especially in case of dyspnea. Dyspnea seems to be related to increased activity of the respiratory muscles. A potential explanation for the use of pursed lips breathing (PLB) is that this type of breathing leads to a reduction of respiratory muscle activity. The purpose of this study was to assess the effect of breathing with a positive expiratory pressure of 5 cm H2O, simulating pursed lips breathing (SPLB), on respiratory muscle activity and pulmonary function during induced airway obstruction.METHODS: In twelve asthmatic patients, tonic and phasic electromyographic (EMG) activity of the following muscles was obtained: scalene muscle, parasternal muscle, and abdominal muscles. Pulmonary function and EMG measurements were performed before and after propranolol induced airway obstruction.RESULTS: Simulated pursed lips breathing resulted in a significant increase of functional residual capacity and tidal volume both at baseline and during airway obstruction. Phasic respiratory muscle activity during PEP breathing increased especially at baseline. We conclude that beneficial effects of breathing with a positive expiratory pressure of 5 cm H2O, which is similar to pursed lips breathing, cannot be explained by changes in respiratory muscle activity or pulmonary function.

KW - airway obstruction

KW - asthma

KW - respiratory muscles

KW - astma

KW - electromyografie

U2 - 10.1002/pri.98

DO - 10.1002/pri.98

M3 - Article

VL - 2

SP - 167

EP - 177

JO - Physiotherapy research international : the journal for researchers and clinicians in physical therapy

JF - Physiotherapy research international : the journal for researchers and clinicians in physical therapy

SN - 1358-2267

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