Non invasive ventilation (NIV) in acute respiratory failure (ARF) improve clinical parameters. arterial blood gases. decrease mortality and endo tracheal intubation (ETI) rate also outside the intensive care units (ICUs). Objective of this study is to verify applicability of NIV in a general non respiratory medical ward. https://safeersappliancers.shop/product-category/hoover-hbd-495d2e-integrated-washer-dryer-9-5kg-white-9kg-washing-capacity/