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Asynchronous thoraco-abdominal motion contributes to decreased 6-minute walk test in patients with COPD.

Publication ,  Journal Article
Chien, J-Y; Ruan, S-Y; Huang, Y-CT; Yu, C-J; Yang, P-C
Published in: Respir Care
February 2013

BACKGROUND: Abnormal thoraco-abdominal motion may contribute to exercise limitation in patients with COPD. The current study aimed to assess how the thoraco-abdominal asynchrony in COPD patients correlates with exercise performance during the 6-minute walk test (6MWT). METHODS: Eighty-eight COPD subjects (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 respiratory inductive plethysmography. RESULTS: Compared to healthy control subjects, subjects with COPD had similar magnitude of rib cage and abdominal motion, but greater asynchrony at rest. During the 6MWT, subjects with COPD showed decreased rib cage motion and increased asynchrony. Rib cage excursion at 3 min after the beginning of the 6MWT was an independent predictor for the 6MWT distance (P < .001), in addition to age, percent of predicted FEV(1), and residual volume/total lung capacity. There was no correlation between rib cage excursion at 3 min and St George's Respiratory Questionnaire score. CONCLUSIONS: Thoraco-abdominal asynchrony worsens early during 6MWT in subjects with moderate and severe COPD, and rib cage excursion at 3 min predicts poor walking capability. A pulmonary rehabilitation strategy devised to improve rib cage excursion may help improve exercise tolerance.

Duke Scholars

Published In

Respir Care

DOI

EISSN

1943-3654

Publication Date

February 2013

Volume

58

Issue

2

Start / End Page

320 / 326

Location

United States

Related Subject Headings

  • Walking
  • Thorax
  • Surveys and Questionnaires
  • Severity of Illness Index
  • Rest
  • Respiratory System
  • Respiration
  • Residual Volume
  • Pulmonary Disease, Chronic Obstructive
  • Plethysmography
 

Citation

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MLA
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Chien, J.-Y., Ruan, S.-Y., Huang, Y.-C., Yu, C.-J., & Yang, P.-C. (2013). Asynchronous thoraco-abdominal motion contributes to decreased 6-minute walk test in patients with COPD. Respir Care, 58(2), 320–326. https://doi.org/10.4187/respcare.01522
Chien, Jung-Yien, Sheng-Yuan Ruan, Yuh-Chin T. Huang, Chong-Jen Yu, and Pan-Chyr Yang. “Asynchronous thoraco-abdominal motion contributes to decreased 6-minute walk test in patients with COPD.Respir Care 58, no. 2 (February 2013): 320–26. https://doi.org/10.4187/respcare.01522.
Chien J-Y, Ruan S-Y, Huang Y-CT, Yu C-J, Yang P-C. Asynchronous thoraco-abdominal motion contributes to decreased 6-minute walk test in patients with COPD. Respir Care. 2013 Feb;58(2):320–6.
Chien, Jung-Yien, et al. “Asynchronous thoraco-abdominal motion contributes to decreased 6-minute walk test in patients with COPD.Respir Care, vol. 58, no. 2, Feb. 2013, pp. 320–26. Pubmed, doi:10.4187/respcare.01522.
Chien J-Y, Ruan S-Y, Huang Y-CT, Yu C-J, Yang P-C. Asynchronous thoraco-abdominal motion contributes to decreased 6-minute walk test in patients with COPD. Respir Care. 2013 Feb;58(2):320–326.

Published In

Respir Care

DOI

EISSN

1943-3654

Publication Date

February 2013

Volume

58

Issue

2

Start / End Page

320 / 326

Location

United States

Related Subject Headings

  • Walking
  • Thorax
  • Surveys and Questionnaires
  • Severity of Illness Index
  • Rest
  • Respiratory System
  • Respiration
  • Residual Volume
  • Pulmonary Disease, Chronic Obstructive
  • Plethysmography