Embodiments of the invention relate to a mask assembly for use in treatment systems for treating obstructive sleep apnea using continuous positive air pressure (CPAP). The mask assembly comprises a mask or nasal interface for supplying gas to the nose of a wearer of the mask assembly. The mask assembly...http://www.google.es/patents/US7575005?utm_source=gb-gplus-sharePatente US7575005 - Mask assembly with integrated sensors
