<p>Disclosed is an oral leak prevention device for patients who use nasal CPAP machines (Continuous positive airway pressure). The device minimises air escaping through the mouth of patient while they are being pressurised through the nasal passage by the airflow of a CPAP machine. The oral leak prevention device is placed over the mouth and securing straps hold the device in place. The built in valve is to allow the patient to inhale if the CPAP machine should fail but under normal circumstances the valve stops air escaping from the mouth while the patient is sleeping.</p>
