Ann Rehabil Med.  2017 Aug;41(4):659-666. 10.5535/arm.2017.41.4.659.

Respiratory Muscle Strength in Patients With Chronic Obstructive Pulmonary Disease

• Kim NS
• Seo JH
• Ko MH
• Park SH
• Kang SW
• Won YH

• KMID: 2389412
• DOI: http://doi.org/10.5535/arm.2017.41.4.659

Abstract

OBJECTIVE
To compare the respiratory muscle strength between patients with stable and acutely exacerbated (AE) chronic obstructive pulmonary disease (COPD) at various stages.
METHODS
A retrospective medical record review was conducted on patients with COPD from March 2014 to May 2016. Patients were subdivided into COPD stages 1-4 according to the Global Initiative for Chronic Obstructive Lung Disease guidelines: mild, moderate, severe, and very severe. A rehabilitation physician reviewed their medical records and initial assessment, including spirometry, maximum inspiratory pressure (MIP), maximum expiratory pressure (MEP), COPD Assessment Test, and modified Medical Research Council scale. We then compared the initial parameters in patients with a stable condition and those at AE status.
RESULTS
The AE group (n=94) had significantly lower MIP (AE, 55.93±20.57; stable, 67.88±24.96; p=0.006) and MIP% (AE, 82.82±27.92; stable, 96.64±30.46; p=0.015) than the stable patient group (n=36). MIP, but not MEP, was proportional to disease severity in patients with AE and stable COPD.
CONCLUSION
The strength of the inspiratory muscles may better reflect severity of disease when compared to that of expiratory muscles.

Keyword

Chronic obstructive pulmonary disease; Respiratory muscles; Rehabilitation; Muscle strength; Dyspnea

MeSH Terms

Dyspnea
Humans
Medical Records
Muscle Strength
Muscles
Pulmonary Disease, Chronic Obstructive*
Rehabilitation
Respiratory Muscles*
Retrospective Studies
Spirometry

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