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Impact of fan therapy during exercise on breathlessness and recovery time in patients with chronic obstructive pulmonary disease: a pilot randomised controlled crossover trial

Long, A., Cartwright, M. ORCID: 0000-0002-3404-5659 and Reilly, C. (2021). Impact of fan therapy during exercise on breathlessness and recovery time in patients with chronic obstructive pulmonary disease: a pilot randomised controlled crossover trial. European Respiratory Journal,

Abstract

Background: Patients with Chronic Obstructive Pulmonary Disease (COPD) reduce physical activity to avoid the onset of breathlessness. Fan therapy (FT) can reduce breathlessness at rest, but the efficacy of FT during exercise remains unknown.

Aim: To investigate 1) the effect of FT on exercise-induced breathlessness and post-exercise recovery time, 2) the acceptability of FT d 3) the reproducibility of any observed improvements.

Methods: A pilot single-centre randomised controlled crossover, open trial of FT vs no FT during 6-minute walk test (6MWT) in patients with COPD and a Modified Medical Research Council (mMRC) dyspnoea score ≥ 2. Breathlessness intensity was quantified pre and on termination of the 6MWT, using the numerical rating scale (NRS). Post-exertional recovery time was defined as the time taken to return to baseline NRS breathlessness score.

Results: Fourteen patients completed the trial per protocol (4 = male, 10 = female; median age (interquartile range) = 66.50 (60.75 -73.5) years); mMRC dyspoena 3 (2-3)). Fan therapy resulted in lower exercise-induced breathlessness (∆ NRS; ∆ mBORG) [within-individual differences in medians (WIDiM) = -1.0, IQR = -2.00 to -0.50, p<0.01; WIDiM = -0.25, IQR = -2.00 to 0.00, p = 0.02], greater distance walked (metres) [WIDiM = 21.25, IQR = 12.75 to 31.88, p <0.01], and improved post-exertional breathlessness recovery time [WIDiM = -10.00, IQR = -78.75 to 50.00, p<0.01.Fan therapy was deemed to be acceptable by 92% of participants.

Conclusion: Fan therapy was acceptable and provided symptomatic relief to patients with COPD during exercise.

Publication Type: Article
Additional Information: This is an author-submitted, peer-reviewed version of a manuscript that has been accepted for publication in the European Respiratory Journal, prior to copy-editing, formatting and typesetting. This version of the manuscript may not be duplicated or reproduced without prior permission from the European Respiratory Society. The publisher is not responsible or liable for any errors or omissions in this version of the manuscript or in any version derived from it by any other parties. The final, copy-edited, published article, which is the version of record, is available without a subscription 18 months after the date of issue publication.
Publisher Keywords: dyspnea, breathlessness perception, COPD course and therapy, physiotherapy
Subjects: R Medicine > RC Internal medicine
Departments: School of Health Sciences > Healthcare Services Research & Management
Date available in CRO: 13 Aug 2021 10:13
Date deposited: 13 August 2021
Date of acceptance: 10 August 2021
URI: https://openaccess.city.ac.uk/id/eprint/26593
[img] Text - Accepted Version
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