Auto-Titrating/Auto CPAP machines are parallel terms; both automatically adjust your pressure breath by breath throughout the night by delivering a more natural exact pressure necessary to comfortably keep your airway open. The auto CPAP senses and adjusts to the pressure that is necessary for your individual sleep therapy needs. A change, such as a loss or gain of ten pounds, can change the optimal pressure for your therapy. A standard CPAP will not automatically adjust, rather than having another sleep study done every time your prescription pressure needs to change; it is easier and more cost effective to use an auto CPAP device. Auto Titrating/Auto CPAPs sense your changing needs and function according to your body's changing demands.