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Cited by 243

The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.

Effect of Bronchoscopic Lung Volume Reduction on Dynamic Hyperinflation and Exercise in Emphysema

Hopkinson, Nicholas S., Toma, Tudor P., Hansell, David M., Goldstraw, Peter, Moxham, John, Geddes, Duncan M., Polkey, Michael I.·2005·American Journal of Respiratory and Critical Care Medicine

Abstract

Endobronchial valve placement improves pulmonary function in some patients with chronic obstructive pulmonary disease, but its effects on exercise physiology have not been investigated. In 19 patients with a mean (SD) FEV(1) of 28.4 (11.9)% predicted, studied before and 4 weeks after unilateral valve insertion, functional residual capacity decreased from 7.1 (1.5) to 6.6 (1.7) L (p = 0.03) and diffusing capacity rose from 3.3 (1.1) to 3.7 (1.2) mmol . minute(-1) . kPa(-1) (p = 0.03). Cycle endurance time at 80% of peak workload increased from 227 (129) to 315 (195) seconds (p = 0.03). This was associated with a reduction in end-expiratory lung volume at peak exercise from 7.6 (1.6) to 7.2 (1.7) L (p = 0.03). Using stepwise logistic regression analysis, a model containing changes in transfer factor and resting inspiratory capacity explained 81% of the variation in change in exercise time (p < 0.0001). The same variables were retained if the five patients with radiologic atelectasis were excluded from analysis. In a subgroup of patients in whom invasive measurements were performed, improvement in exercise capacity was associated with a reduction in lung compliance (r(2) = 0.43; p = 0.03) and isotime esophageal pressure-time product (r(2) = 0.47; p = 0.03). Endobronchial valve placement can improve lung volumes and gas transfer in patients with chronic obstructive pulmonary disease and prolong exercise time by reducing dynamic hyperinflation.

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Metadata

Authors
Hopkinson, N. S., Toma, T. P., Hansell, D. M., Goldstraw, P., Moxham, J., Geddes, D. M., & Polkey, M. I.
Venue
American Journal of Respiratory and Critical Care Medicine
Published
2005-03-01
Volume
171
Issue
5
Pages
453-460
ISSN
  • 1073-449X (ISSN-L)
  • 1535-4970
OpenAlex
W2065218757
Cited by
243
References
9
FWCI
13.79
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Effect of Bronchoscopic Lung Volume Reduction on Dynamic Hyperinflation and Exercise in Emphysema. https://app.cochat.ai/papers/10.1164/rccm.200407-961oc
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Hopkinson, N. S., Toma, T. P., Hansell, D. M., Goldstraw, P., Moxham, J., Geddes, D. M., & Polkey, M. I. (2005). Effect of Bronchoscopic Lung Volume Reduction on Dynamic Hyperinflation and Exercise in Emphysema. American Journal of Respiratory and Critical Care Medicine. https://doi.org/10.1164/rccm.200407-961oc

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