ACUTE EFFECTS OF BIPAP--CPAP ON HEMODYNAMICS AND RESPIRATORY PARAMETERS IN MANAGEMENT OF TYPE 2 RESPIRATORY FAILURE PATIENTS. - Kausar, Shabana; Asghar, Muhammad Imran; Ahmed, Aftab; Tariq, Muhammad Iqbal; Saeed, Haroon; Ahmed, Waqas; Akhtar, Tehseen (Pakistan Armed Forces Medical Journal, 2021)