Chronic Obstructive pulmonary diseases can be defined as irregularities in the small airways of the lungs characterized by constant and progressive lung airflow obstruction. Its symptoms progressively compromise the patient ability to function normally COPD management comprises a multidisciplinary approach. Physiotherapy management of COPD includes sputum removal techniques where copious secretions lead to discomfort.

Objective: To compare the effects of active cycle of breathing technique and high frequency chest wall oscillations in chronic obstructive pulmonary disease patients.

Methods: Study plan was randomized clinical trial. The study was conducted at pulmonary department of DHQ hospital NAROWAL. The study was completed six months after the approval of synopsis. Sample size is 42. Consecutive sampling technique was used. Patients were allocated into two groups A and B. group A was treated with active cycle of breathing pattern and group B treated with high frequency chest oscillations. Post treatment readings were taken at the end of 4th week. Total treatment sessions were twelve and four weeks of training and three sessions per week. The data analysis was done by using SPSS version 25

Results: 42 subjects were screened according to inclusion and exclusion criteria. Procedure was explained to them and informed consent was taken. Patients were randomly allocated into two groups. Group A received active cycle of breathing technique with routine chest physiotherapy. Group B received high frequency chest wall oscillations. Normality of test was checked by Shapiro wilk test that showed that data was normally distributed with p value > 0.05. A paired sample t test and independent samples t-test was conducted to compare the effects of Active cycle of breathing technique and High frequency chest wall oscillations method in in between and within group

Conclusion: ACBT and HFCWO shows major improvement in treating COPD , but when associated both the techniques patients which are treated with high frequency oscillation have shown better effects as compared to other technique.

Index terms-Chronic obstructive pulmonary disease, active cycle of breathing techniques, high frequency chest wall oscillation, lung airflow obstruction, multidisciplinary approach, physical therapy management, routine chest physio therapy.