Patient will be asked to attain fowler's position by placing a pillow in front of his trunk to support a comfortable breathing pattern. Then, patient will be instructed to inhale through nose deeply until no more air can be inhaled and which will be followed by a slow expiration through pursed or rounded lip, like at the time of whistling.Patient will also be demonstrated visually for the proper breathing pattern even for once to multiple times till complete understanding before performing itself. The technique will be administered to the patient under supervision for 10 minutes, and the patient will be instructed to use this trained exercise in his daily routine as per needed.

Patient will be asked to attain recumbent position by lying supine at a reclining angle to support a comfortable breathing pattern. Then, patient will be instructed to inhale slowly and deeply once through nose and hold it, then inhale again slowly and deeply through nose and trap the air in again over the first one, then inhale again until no more air can be inhaled and which will be held for a bit then followed by a slow and quiet expiration. Patient will also be demonstrated visually for the proper breathing pattern even for once to multiple times till complete understanding before performing itself

pursed lip breathing technique for group A through videos on smart phones and a brochure given to patients. Each session takes 15-20 minutes until researchers ensure that patients understand how to perform exercises and re-demonstrate them. • Each group applied it twice per day for a period of 4 weeks. Telephone follow-up was used for patients in both groups

The Modified Borg Dyspnea Scale has demonstrated both validity and reliability in various populations, including both healthy individuals and clinical patients with a highly significant values of Pearson's correlation coefficient and Spearman's correlation coefficient that lies within the range of 0.5 to 0.99, which showsa p-value of less than 0.05. Its ease of use has made it widely employed for monitoring exercise intensity in exercise prescription and rehabilitation settings

Spirometry is a maneuver that works on the principle of forced expiration, and is constituted of FEV1; that signifies the volume of air pushed out of lung forcefully within one second, FVC; which represents the forced vital capacity of lungs and ratio of FEV1 / FVC, to measure the limitation faced by patients of chronic bronchitis during airflow. Spirometry is considered to be a gold standard instrument that has been employed to assess the forced expiratory flow parameters among patients of COPD, asthma, chronic bronchitis. It been proven to be a highly reliable and valid tool on the basis of value of 95% confidence interval that was determined from 0.51 to 0.86, with the purpose to keep lung volumes under surveillance

Healthcare professionals worldwide use pulse oximeter on a daily basis to obtain a noninvasive measurement of SpO2, which reflects arterial oxygen saturation (SaO2). This measurement aids in identifying and addressing hypoxemia (low oxygen levels) and hyperoxemia (high oxygen levels). Pulse oximetry monitoring is commonly regarded as the fifth vital sign and is particularly recommended for patients in need of oxygen therapy

The EQ-5D-5L includes a descriptive system consisting of five dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression, with one item per dimension. By assigning preference-based weights (usually specific to each country), the responses to these items can be converted into a single measure of health utility. Furthermore, the instrument provides instructions for indicating overall health status of present day on a visual analog scale.EuroQol;5D-5L is a valid and reliable tools with inter-rater correlation coefficient value of 0.7, and a value of convergent validity of 0.756 under the domain of Spearman Rho Rank correlation coefficient