To study predictors of outcome of nonivasive ventilation in copd patients with hypercarbic respiratory faliure in respiratory unit of tertiary care centre - AIIMS Rishikesh Dept. of Pulmonary Critical care and Sleep Medicine 2021 - 201p. Includes References Subjects--Topical Terms: Pulmonary Critical Care and Sleep Medicine Dewey Class. No.: 616.2 / GUP-TOS