VECTOR et Auto CPAP is a therapy device for treating obstructive sleep apnea. Within a certain pressure range the device automatically controls the therapy pressure depending on the occurrence of respiratory events. In sleep phases with no events the therapy pressure is lowered. Starting obstructive events are treated effectively with a slight pressure increase. For a high therapy comfort the therapy pressure should always be only as high as necessary and as low as possible. The device can recognize the following respiratory events: • Obstuctive apnea • Hypopnea • Central apnea • Snoring • Normal respiration The identification of the different respiratory events is achieved via 3 channels: 1. Measurement of any constriction of the respiratory tract. 2. Detection of flow limitations by measuring the flow. 3. Detection of snoring with the help of sound detection. The combined analysis of all results facilitates a very precise differentiation between obstructive and central events. The device adjusts the therapy pressure according to the detected events as described below: • Increase of pressure for obstructive events • Decrease of pressure for central events and normal respiration In addition, the pressure increase can be adjusted in 5 levels according to special requirements and to the individual patient comfort. These settings are performed by the doctor with the help of the PC software TRENDset. In addition to normal APAP and CPAP modes the device offers the FLEXLINE mode, a pressure increase which is proportionate to the individual respiration flow during inspiration and a pressure decrease during expiration.