Weiliang Wu1, Lili Guan1, Xianming Zhang2, Xiaoying Li1, Yuqiong Yang1, Bingpeng Guo1, Yonger Ou1, Lin Lin1, Luqian Zhou3, Rongchang Chen4. 1. Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China. 2. Department of Respiratory Medicine, The First Affiliated Hospital of Guizhou Medical University, Guizhou, China. 3. Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China. Electronic address: zhlx09@163.com. 4. Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China. Electronic address: chenrc_vip@163.com.
Abstract
PURPOSE: We conducted a randomised controlled trial to assess the effects of daily breathing pattern changes to stable patients with COPD excluding the confounding factors of inspiratory muscle mobilization, by ensuring the load intensities of two inspiratory training devices were equal. PATIENTS AND METHODS: Sixty patients with COPD were randomised to three groups: resistive-IMT group (T-IMT, 21 patients), threshold-IMT (R-IMT, 19 patients), and a control group (20 patients). Inspiratory load intensity for both methods was set at 60% of maximal inspiratory pressure (MIP), a measure of inspiratory muscle strength, which, along with health-related quality of life (HRQoL), degree of dyspnoea, and exercise capacity, were conducted before and after 8 weeks of daily IMT. RESULTS: At 8 weeks, there was no significantly difference of MIP between the R- and T-IMT groups (P > 0.05). Chronic Respiratory Disease Questionnaire and Transition Dyspnea Index scores improved significantly after each training program compared with controls (P < 0.05), and R-IMT was significant better (P < 0.05). R-IMT was better than T-IMT in performance of exercise (P < 0.05). CONCLUSIONS: In summary, in clinically stable patients with COPD, 8 weeks of R-IMT was superior to 8 weeks of equal-intensity T-IMT in improving HRQoL, degree of dyspnoea, and exercise capacity.
RCT Entities:
PURPOSE: We conducted a randomised controlled trial to assess the effects of daily breathing pattern changes to stable patients with COPD excluding the confounding factors of inspiratory muscle mobilization, by ensuring the load intensities of two inspiratory training devices were equal. PATIENTS AND METHODS: Sixty patients with COPD were randomised to three groups: resistive-IMT group (T-IMT, 21 patients), threshold-IMT (R-IMT, 19 patients), and a control group (20 patients). Inspiratory load intensity for both methods was set at 60% of maximal inspiratory pressure (MIP), a measure of inspiratory muscle strength, which, along with health-related quality of life (HRQoL), degree of dyspnoea, and exercise capacity, were conducted before and after 8 weeks of daily IMT. RESULTS: At 8 weeks, there was no significantly difference of MIP between the R- and T-IMT groups (P > 0.05). Chronic Respiratory Disease Questionnaire and Transition Dyspnea Index scores improved significantly after each training program compared with controls (P < 0.05), and R-IMT was significant better (P < 0.05). R-IMT was better than T-IMT in performance of exercise (P < 0.05). CONCLUSIONS: In summary, in clinically stable patients with COPD, 8 weeks of R-IMT was superior to 8 weeks of equal-intensity T-IMT in improving HRQoL, degree of dyspnoea, and exercise capacity.
Authors: Jade Schrijver; Anke Lenferink; Marjolein Brusse-Keizer; Marlies Zwerink; Paul Dlpm van der Valk; Job van der Palen; Tanja W Effing Journal: Cochrane Database Syst Rev Date: 2022-01-10