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
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.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Vestbo, J., Hurd, S. S., Agustí, A. G., Jones, P. W., Vogelmeier, C., Anzueto, A., Barnes, P. J., Fabbri, L. M., Martinez, F. J., Nishimura, M., et al. (2013) · American Journal of Respiratory and Critical Care Medicine · doi:10.1164/rccm.201204-0596pp · Cited by 15,983
A randomized trial comparing lung-volume-reduction surgery with medical therapy for severe emphysema
(2003) · New England Journal of Medicine · doi:10.1056/nejmoa030287 · Cited by 2,071
Dynamic Hyperinflation and Exercise Intolerance in Chronic Obstructive Pulmonary Disease
O'DONNELL, D. E., REVILL, S. M., & WEBB, K. A. (2001) · American Journal of Respiratory and Critical Care Medicine · doi:10.1164/ajrccm.164.5.2012122 · Cited by 1,076
O'DONNELL, D. E., LAM, M., & WEBB, K. A. (1998) · American Journal of Respiratory and Critical Care Medicine · doi:10.1164/ajrccm.158.5.9804004 · Cited by 532 · cited 3×
“However, on the basis of other studies that have looked at the effect of bronchodilators or LVRS in COPD ( 11 , 12, 24) the scale of improvement observed is unlikely to have occurred as a consequence of natural variation or a placebo effect.”
BackgroundResultInfluentialO'DONNELL, D. E., LAM, M., & WEBB, K. A. (1999) · American Journal of Respiratory and Critical Care Medicine · doi:10.1164/ajrccm.160.2.9901038 · Cited by 485
Contractile Properties of the Human Diaphragm during Chronic Hyperinflation
Similowski, T., Yan, S., Gauthier, A. P., Macklem, P. T., & Bellemare, F. (1991) · New England Journal of Medicine · doi:10.1056/nejm199109263251304 · Cited by 473
Belman, M. J., Botnick, W. C., & Shin, J. W. (1996) · American journal of respiratory and critical care medicine · doi:10.1164/ajrccm.153.3.8630581 · Cited by 402
Diaphragm Activation during Exercise in Chronic Obstructive Pulmonary Disease
SINDERBY, C., SPAHIJA, J., BECK, J., KAMINSKI, D., YAN, S., COMTOIS, N., & SLIWINSKI, P. (2001) · American Journal of Respiratory and Critical Care Medicine · doi:10.1164/ajrccm.163.7.2007033 · Cited by 201
Effect of Lung Volume Reduction Surgery on Neuromechanical Coupling of the Diaphragm
LAGHI, F., JUBRAN, A., TOPELI, A., FAHEY, P. J., GARRITY, E. R., ARCIDI, J. M., de PINTO, D. J., EDWARDS, L. C., & TOBIN, M. J. (1998) · American Journal of Respiratory and Critical Care Medicine · doi:10.1164/ajrccm.157.2.9705082 · Cited by 108
Cited by
A Randomized Study of Endobronchial Valves for Advanced Emphysema
Sciurba, F. C., Ernst, A., Herth, F. J. F., Strange, C., Criner, G. J., Marquette, C. H., Kovitz, K. L., Chiacchierini, R. P., Goldin, J., & McLennan, G. (2010) · New England Journal of Medicine · doi:10.1056/nejmoa0900928 · Cited by 832
The major limitation to exercise performance in COPD is dynamic hyperinflation
O'Donnell, D. E., & Webb, K. A. (2008) · Journal of Applied Physiology · doi:10.1152/japplphysiol.90336.2008b · Cited by 221
Physiologic Basis for Improved Pulmonary Function after Lung Volume Reduction
Fessler, H. E., Scharf, S. M., Ingenito, E. P., McKenna, R. J., & Sharafkhaneh, A. (2008) · Proceedings of the American Thoracic Society · doi:10.1513/pats.200708-117et · Cited by 84
Zoumot, Z., Davey, C., Jordan, S., McNulty, W. H., Carr, D. H., Hind, M. D., Hansell, D. M., Rubens, M. B., Banya, W., Polkey, M. I., et al. (2015) · Efficacy and Mechanism Evaluation · doi:10.3310/eme02050 · Cited by 10
Self-citation
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
- Publisher
- Oxford University Press (OUP)
- 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
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- 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
- The paper
- 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
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.