BiPAP (Bi-level positive airflow pressure). This device has two pressure settings, one pressure for inhaling and a lower pressure for exhaling. It’s used for individuals who can’t tolerate CPAP machines or have elevated carbon dioxide levels in their blood. BiPAP devices can also come with a backup respiratory rate for patients who have central sleep apnea. The backup respiratory rate ensures the person breathes, as the main problem with central sleep apnea is initiating breath. If you have trouble breathing, a BiPap machine can help push air into your lungs. . The machine supplies pressurized air into your airways. It is called “positive pressure ventilation” because the device helps open your lungs with this air pressure.BiPap may help you if you have a medical problem that impairs your breathing. For example (Chronic obstructive pulmonary disorder (COPD) &Obstructive sleep apnea &Obesity hypoventilation syndrome & BiPap is usually very safe. It has a lower risk of complications, such as infection, compared with ventilator support like a tracheostomy. Pneumonia& Asthma flare-up & Poor breathing after an operation& Neurological disease that disturbs breathing .BiPap is usually very safe. It has a lower risk of complications, such as infection, compared with ventilator support like a tracheostomy.