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Effectiveness of Pulmonary Rehabilitation on Pulmonary Function Parameters and Dyspnea in Patients with Stable Chronic Obstructive Pulmonary Disease Atef F

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Effectiveness of Pulmonary Rehabilitation on Pulmonary Function Parameters and Dyspnea in Patients with Stable Chronic Obstructive Pulmonary Disease Atef F Original article 149 Effectiveness of pulmonary rehabilitation on pulmonary function parameters and dyspnea in patients with stable chronic obstructive pulmonary disease Atef F. Al Karn, Wafaa A. Hassan, Abdel A. Abo El Fadl, Manal A. Mahmoud Background Chronic obstructive pulmonary disease first second (P = 0.001), forced vital capacity (P = 0.001), and (COPD) is a common preventable and treatable disease inspiratory capacity (P = 0.015). There was a significant characterized by persistent airflow limitation that is usually decrease in the mean functional residual capacity (P = 0.005), progressive. The characteristic symptoms of COPD are residual volume (P = 0.001), and total lung capacity chronic and progressive dyspnea, cough, and sputum (P = 0.001). There was no significant difference between the production. Breathing exercises aim to reduce hyperinflation, values of the previous parameters in the control group. improve respiratory muscle performance, and reduce Conclusion In stable COPD, breathing exercises improved dyspnea. pulmonary function parameters, 6-min walk distance, and Aim The aim of the study was to assess the effectiveness of dyspnea score. breathing exercises among patients with stable COPD in Egypt J Bronchol 2018 12:149–153 improvement of pulmonary function parameters, 6-min walk © 2018 Egyptian Journal of Bronchology distance, and dyspnea score. Egyptian Journal of Bronchology 2018 12:149–153 Patients and methods Randomized controlled design was Keywords: chronic obstructive pulmonary disease, dyspnea, pulmonary used in this study. Patients recruited for this study were rehabilitation enrolled from the outpatient clinic of Department of Chest Department of Chest Diseases and Tuberculosis, Assiut University Hospital, Diseases and Tuberculosis. Overall, 15 patients with stable Assiut, Egypt COPD were enrolled in pulmonary rehabilitation group and Correspondence to Manal Ahmed El Khawaga, Department of Chest underwent breathing exercises for 12 weeks. Moreover, 15 diseases and tuberculosis, Faculty of Medicine, Assiut university patients were enrolled in the control group. Statistical Tel: + 20 882 413 711; fax: 088/2350177; package for the social sciences (SPSS version 20) software e-mail: [email protected] was used for statistical analysis. Received 26 May 2016 Accepted 28 February 2017 Results In the breathing exercise group, there was a significant increase in the mean forced expiratory volume in Introduction January 2014 to March 2015. All patients provided Chronic obstructive pulmonary disease (COPD) is a written consent, and the study was approved by the common preventable and treatable disease characterized respective ethics committees and institutional review by airflow limitation that is usually progressive [1]. boards. Airflow limitation is usually associated with air trapping and hyperinflation. Lung hyperinflation results The inclusion criteria were diagnosis as stable in disruption of neuroventilatory coupling, increased COPD ‘moderate, severe, and very severe’ according work of breathing, and the perception of dyspnea. to Global Initiative for Obstructive Lung Disease Breathing exercises are designed to retain the breathing guidelines 2015 [1] [post bronchodilator forced pattern, reduce breathlessness, increase exercise capacity, expiratory volume in first second (FEV1)/forced vital alter respiratory muscle recruitment, improve respiratory capacity (FVC) <70%], age more than 40 years, male muscle performance, reduce dyspnea, and improve sex, and hyperinflation [total lung capacity (TLC) well-being for patients with COPD [2]. >120% predicted by plethysmography]. The aim of the study was to evaluate the effect of The main exclusion criteria were bronchial asthma, breathing exercises on hyperinflation in patients with heart diseases, musculoskeletal disorders, peripheral stable COPD. Exertional dyspnea, pulmonary function vascular diseases, respiratory failure, decompensated tests parameters, and 6-min walk distance were the corpulmonale, acute pulmonary embolism, uncontrolled main outcome measures. cardiac arrhythmia, and any disabling conditions that would interfere with the tests. Patients and methods This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 This prospective cross-sectional randomized controlled License, which allows others to remix, tweak, and build upon the work study was carried out in Chest Outpatient Clinic. non-commercially, as long as appropriate credit is given and the new The total duration the study was 12 weeks from creations are licensed under the identical terms. © 2018 Egyptian Journal of Bronchology | Published by Wolters Kluwer - Medknow DOI: 10.4103/ejb.ejb_43_16 150 Egyptian Journal of Bronchology, Vol. 12 No. 2, April-June 2018 Following an initial screening visit at the outpatient There was no statistical significant difference clinic to assess eligibility, patients who fulfilled the regarding the baseline pulmonary function tests inclusion criteria were asked to return after 2 weeks parameters at baseline visit among the study groups for the baseline visit. Patients were kept on their (Table 2). current treatment (such as inhaled corticosteroids and long-acting B2 agonist). Patients were randomized at In the control group, there was a nonsignificant difference the baseline visit through the closed envelop method to between the baseline values and the values obtained after allocate each of them either into breathing exercises 12 weeks regarding spirometric parameters such as group, which underwent exercises to mobilize one side FEV1 (P=0.107), FVC (P=0.089), and inspiratory of the chest, mobilize the upper chest, stretch the capacity (IC) (P=0.239); plethysmographic parameters pectoralis muscles, and mobilize the upper chest and such as functional residual capacity (FRC) (P=0.148), shoulders and pursed lip breathing, or into the control residual volume (RV) (P=0.116), and TLC (P=0.840); group. Patients in the control group were kept only dyspnea score (P=0.115); and 6-min walking distance on their current treatment. Clinic visits were scheduled (P=0.327) (Table 3). after 4, 8, and 12 weeks following randomization. Assessment of dyspnea by modified Medical Research In the breathing exercise group, there was a significant Council(mMRC),6-minwalkdistance,and performing improvement in FEV1 (P=0.001), FVC (P=0.001), pulmonary function testing including spirometry and IC (P=0.015), FRC (P=0.005), RV (P=0.001), body plethysmography (D 97723; Zan 300, Oberthulba, TLC (P=0.001), RV/TLC (P=0.010), dyspnea score Germany) were done at baseline and at all clinic visits. (P=0.005), and 6-min walking distance (P=0.001) Measurements were performed according to American whereas there was a nonsignificant difference regarding Thoracic Society criteria.[3]. baseline and 12-week values for FEV1/FVC (P=0.637) (Table 4). Statistical analysis All results were tabulated and statistically analyzed Discussion using the statistical package for the social sciences (SPSS version 20; SPSS Inc., Chicago, Illinois, The present study was designed to evaluate pulmonary USA) software. Data were expressed as mean±SD functions, dyspnea score, and 6-min walking distance or frequencies. The t-test was used for comparison following 12 weeks courseof breathing exercises that aim of continuous variables between the two groups. to decrease hyperinflationinpatientswithstableCOPD. Wilcoxon’s sign rank test was used for comparing the results in the same group before and after the therapy. Regarding the characteristics of the study participants, the present study showed that the mean age of study Results Table 2 Pulmonary function test parameters at the baseline visit (n=30) A total of 30 patients were selected for this study, with Variables Control Breathing P value 15 patients in each group. group (N=15) exercises group (mean±SD) (N=15) (mean±SD) Patient demographics FEV1% 35.07±13.20 40.93±19.83 0.305 Age, weight, height, BMI, smoking status, and pack predicted FVC% predicted 51.53±7.25 57.00±21.91 0.092 per year index were determined in all patients (Table 1). FEV1/FVC% 65.73±12.12 70.73±12.20 0.399 predicted Table 1 Demographic characteristics of the study patients at IC% predicted 42.27±10.20 47.87±16.78 0.093 the baseline visit (n = 30) FRC% predicted 158.20±39.23 156.13±37.99 0.097 Variables Control (N = 15) Breathing P value RV % predicted 141.27±11.75 136.00±4.46 0.154 = (mean±SD) exercise (N 15) TLC% predicted 143.67±30.81 141.27±10.38 0.168 (mean±SD) RV/TLC % 160.93±29.09 152.07±29.02 0.112 Age (years) 64.47±6.99 64.87±8.56 0.976 predicted Height (cm) 162.87±7.21 166.47±6.13 0.170 Dyspnea score 3.27±0.46 3.43±0.46 0.028 Weight (kg) 65.53±14.29 65.20±6.95 0.935 (mMRC) BMI (kg/m2) 24.62±4.65 23.49±1.73 0.524 6-min walking 50.87±9.46 51.73±7.06 0.660 distance (m) Smoking status [n (%)] Current smoker 1 (6.7) 2 (13.3) 0.697 FEV1, forced expiratory volume in 1 s; FRC, functional residual Ex-smoker 14 (93.3) 13 (86.7) capacity; FVC, forced vital capacity; IC, inspiratory capacity; mMRC, modified Medical Research Council; RV, residual volume; Pack per year 22.40±7.94 22.80±4.71 0.943 TLC, total lung capacity. Pulmonary rehab. for COPD patients Al Karn et al. 151 Table 3 Pulmonary function test parameters before and after 12 weeks in the control group (n=15) Variables Baseline After 12 weeks P value FEV1% predicted 35.07±13.20 35.13±9.55 0.107 FVC% predicted 51.53±7.25 53.27±9.08 0.089 FEV1/FVC% predicted 65.73±12.12 64.47±10.70 0.181 IC% predicted 42.27±10.20 42.73±9.48 0.239 FRC% predicted 158.20±39.23 157.07±39.11 0.148 RV% predicted 141.27±11.75 142.93±11.41 0.116 TLC% predicted 143.67±30.81 147.53±28.96 0.840 RV/TLC% predicted 160.93±29.09 158.20±25.43 0.092 Dyspnea score (mMRC) 3.27±0.46 3.18±0.41 0.115 6-min walking distance (m) 50.87±9.46 49.87±9.43 0.327 FEV1, forced expiratory volume in 1 s; FRC, functional residual capacity; FVC, forced vital capacity; IC, inspiratory capacity; mMRC, modified Medical Research Council; RV, residual volume; TLC, total lung capacity.
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