| Author: | Poon, Shun-kuk Pauline |
| Title: | Effects of pursed lip breathing on dyspnoea, physiological responses and sternomastoid muscle recruitment in patients with chronic obstructive pulmonary disease |
| Degree: | M.Sc. |
| Year: | 2000 |
| Subject: | Lungs -- Diseases, Obstructive Respiration Hong Kong Polytechnic University -- Dissertations |
| Department: | Multi-disciplinary Studies Department of Rehabilitation Sciences |
| Pages: | xii, 88 leaves : ill. (some col.) ; 30 cm |
| Language: | English |
| Abstract: | Pursed lip breathing (PLB), the prolongation of expiration through pursed lips, is often used to improve the control of breathing and to relieve the dyspnoea sensation of patients with chronic obstructive pulmonary disease (COPD). Research on PLB has been focused on its effect on the physiological responses. Relatively few studies have used dyspnoea sensation and respiratory muscle recruitment to assess the efficacy of PLB. No study has so far been conducted to study its effect on acutely breathless patients with moderate to severe COPD. The purpose of this study was to investigate the effects of PLB on dyspnoea sensation, physiological responses and electromyographic activities of the sternomastoid muscle (EMG-SM) in acutely breathless patients with moderate to severe COPD. Thirteen patients with acute exacerbation of COPD with forced expiratory volume in the first second (FEV1) <70% of the predicted value (% predicted) were randomly assigned to two groups. The variables measured included subjective evaluation of dyspnoea using the modified Borg scale (MBS) and objective measurements on end-tidal carbon dioxide (ETCO2), SpO2, respiratory rate (RR), heart rate (HR) and EMG-SM. These variables were measured before and immediately after a spirometry test and at one minute intervals for four minutes after the spirometry test. During the four minutes, subjects in the PLB group (n=7) underwent a protocol of PLB whilst the control group (n=6) received no respiratory intervention. Comparisons of dyspnoea sensation, physiological responses and accessory inspiratory muscle recruitment, within and between the two groups, were carried out using the two-way repeated measures analysis of variance (ANOVA). The significance level was set at p<0.05. The results showed significant decrease in the dyspnoea sensation and RR between the control and PLB groups at the fourth minute post spirometry test (p=0.017 and 0.015 respectively). No significant differences were demonstrated in other variables. The results of the present study provide evidence that PLB is effective in relieving the dyspnoea sensation in patients with acute exacerbation of COPD. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b15418066.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 5.81 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/12