Document Detail

Asynchronous Thoraco-Abdominal Motion Contributes to Decreased Six-Minute Walk Test in Patients with Chronic Obstructive Pulmonary Disease.
MedLine Citation:
PMID:  22782088     Owner:  NLM     Status:  Publisher    
BACKGROUND: Abnormal thoraco-abdominal motion may contribute to exercise limitation in patients with chronic pulmonary obstructive disease (COPD). The current study aimed to assess how the thoraco-abdominal asynchrony in COPD patients correlates with exercise performance during the six-minute walk test (6MWT). METHODS: Eighty-eight COPD patients (40 moderate and 48 severe) and 14 healthy controls were evaluated at rest and during the 6MWT for the magnitude of rib cage and abdominal motion and asynchrony between the two (phase angle) with a respiratory inductive plethysmography. RESULTS: Compared to healthy control subjects, patients with COPD had similar magnitude of rib cage and abdominal motionbut greater asynchrony at rest. During the 6MWT, patients with COPD showed decreased rib cage motion and increased asynchrony. Rib cage excursion at 3 min after the beginning of 6MWT (RC3min) was an independent predictor for the 6MWT distance (p <0.0001), in addition to age, forced expiratory volume in one second (FEV₁, % predicted) and residual volume/total lung capacity ratio. There was no correlation between RC3min and St George's Respiratory Questionnaire scores. CONCLUSIONS: Thoraco-abdominal asynchrony worsens early during 6MWT in patients with moderate and severe COPD and RC3min predicts poor walking capability. A pulmonary rehabilitation strategy devised to improve rib cage excursion may help improve exercise tolerance.
Jung-Yien Chien; Sheng-Yuan Ruan; Yuh-Chin T Huang; Chong-Jen Yu; Pan-Chyr Yang
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-10
Journal Detail:
Title:  Respiratory care     Volume:  -     ISSN:  0020-1324     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7510357     Medline TA:  Respir Care     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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