Acapella group.Will use Acapella device for 3 times per day for 15 minutes for 7 days beside medications and routine chest physical therapy program.~Only routine physical therapy program group( control group). Will only take medications and routine chest physical therapy program Spirometer measures such as forced vital capacity (FVC) and forced expiratory volume in the first second (FEV1) will be measured for every patient before and after the end of 7 days.
Acapella group. Will use Acapella device for 3 times per day for 15 minutes for 7 days beside medications and routine chest physical therapy program .~Only routine physical therapy program group ( control group). Will only take medications and routine chest physical therapy program.