Acute effects of Threshold Inspiratory Muscle Training on sputum volume, pulmonary functions and length of hospital stay among patients with COPD in a tertiary health care set up of a low-middle income country- A Pilot Randomized Control Trial

Abstract

<b>Background:</b> Although benefits of inspiratory muscle training is demonstrated in COPD, little or no evidence demonstrates the benefits of acute effects of inspiratory muscle training on sputum volume, pulmonary functions and length of hospital stay in this population. <b>Aims &amp; Objectives:</b> We aimed to compare the acute effects of inspiratory muscle training on sputum volume, pulmonary functions &amp;length of hospital stay in patients with COPD <b>Methods:</b> Twenty subjects (13 M &amp;7 F) with mean age of 62.10±11.49 years were recruited. All groups received in-patient based standard medical care. Group 1(n=10) received Routine physiotherapy (Postural drainage, Percussion, Vibrations, ACBT &amp; early mobilization). Group 2(n=10) received Inspiratory muscle training (Threshold IMT) along with Routine physiotherapy. Sputum volume was assessed after each treatment session using a volumetric jar. FEV1, PEFR was assessed on Day 1&amp; 6 of treatment session. Length of stay in hospital was noted for each subject in both the groups. <b>Results:</b> Volume of sputum collected in group 1 was (18.05±5.67) and in group 2 was (27.08±7.39)(p=0.00). FEV1 in group 1 (46.69±19.47) and group 2 (60.80±9.05)(p=0.00). PEFR in group 1 (44.90±12.55) &amp; group 2 (74.40±23.73)(p=0.00). Length of hospital stay in group 1was (8±0.82) and in group 2 was (6±0.52)(p=0.00). <b>Conclusion:</b> Addition of Threshold IMT along with routine physiotherapy has positive effects on sputum clearance &amp; pulmonary functions thereby reducing respiratory symptoms &amp; hastening hospital stay in patients with COPD.