To Compare The Effect of Conventional Huffing with Therapist Made Huffing Device on Sputum Volume In Subjects With Acute Exacerbation of COPD Journal title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) Authors: Dr.Sneha Ghuman, Dr. Varoon Jaiswal, Deepika Burman, Dr. Snehal Ghodey Subject(s):