C-Flex+ provides an advanced flexible expiratory pressure feature for fixed CPAP. C-Flex+ models the advanced algorithms of Bi-Flex and A-Flex to provide a transitional flexible pressure relief as the patent moves from inhalation to expiration. This is followed by the flow-based pressure relief at the beginning of exhalation that includes an additional 2cm H2O pressure decrease. As the patent moves into inspiratory stage, pressure returns to the set CPAP level prior to the next breath. C-Flex+ is a promising new approach to CPAP therapy using flexible pressure technology. The REMstar Pro with C-Flex+ delivers three different therapies: CPAP, CPAP with C-Flex and CPAP with C-Flex+. The System One REMstar Pro C-Flex+ is used to treat Obstructive Sleep Apnea. Digital Auto-Track Sensitivity is the brains behind all Flex Family pressure relief technologies. Digital Auto-Trak is a highly sensitive algorithm that tracks each breath and detects the onset of inspiration and expiration – even in the presence of mask leak. It then responds by triggering the machine to provide an adaptive pressure relief right when the patient needs it. Delivering the right level of pressure relief when patients need it makes therapy more natural – and more comfortable.