A Titration study is performed after a patient has been diagnosed with Obstructive Sleep Apnea. It is done to determine the correct Cpap pressure setting. During this study you will be connected to a computerized Cpap device that is managed by the Respiratory Technician. All the sensors used during the PSG study are utilized during this test as well. The pressure first begins at the lowest level and then gradually increases until the airway obstruction is resolved. Cpap can be ordered based on these settings.