BIPAP and CPAP are modes of pressure and oxygen delivery for patients with special needs like sleep apnea, muscular weakness (ALS, MS, etc), and chronic respiratory failure. They are used mostly during sleep but they can be used during the day as well in select patients. They are collectively referred to as non-invasive positive pressure ventilation, or NPPV. For some diagnoses, NPPV can be prescribed immediately, but for others, like sleep apnea, additional testing like a formal sleep study may be needed. Please contact our office for further questions.