BiLevel Non Invasive Ventilator (BiPAP) ST25 is a method of breathing support that is often used to treat Ventilation for your Breathing Problem, Obstructive sleep apnea and Central sleep apnea (both OSA and CSA), but it’s not used for life support. It can provide the correct airway pressure to prevent or even correct disordered breathing such as all kinds of sleep apnea, hypopnea, air flow restrictions, COPD and snoring.