This study combines a diagnostic sleep study and a treatment sleep study all in one night. You will be connected to similar leads, sensors, and belts as described under Diagnostic Sleep Study. The first half of the night, the tech monitors your sleep. The tech will interrupt your sleep around 1:30 a.m. to fit the CPAP mask to your face. The tech spends the remainder of the night remotely adjusting the pressure, which is designed to reduce or eliminate your breathing disorder.