Machines come with a six foot hose, power cord, at least one filter, basic mask and manuals. Most manufacturers include a carrying case which is designed specifically for their equipment. The basic mask that is included is the Respironics Comfort Classic Nasal CPAP Mask. other CPAP Masks are considered upgrades and must be purchased separately.
Bi-Flex is a feature that makes breathing back against CPAP pressure easier to do. Bi-Flex pressure relief technology offers pressure relief at the transition from exhalation to inhalation, at the transition from inhalation to exhalation, and during exhalation to make BiPAP therapy more like natural breathing.
A-Flex is a form of exhalation relief which helps the air pressure from an APAP machine mirror a person's breathing. Like C-Flex, A-Flex provides flow-based pressure relief at the beginning of exhalation. Like Bi-Flex, A-Flex softens the pressure transition from inhalation to exhalation to provide additional comfort in an auto-CPAP mode.
C-Flex is a pressure relief feature that makes breathing back against CPAP pressure easier to do by reducing the pressure at the beginning of exhalation and returning to therapeutic pressure just before inhalation. Independent studies conducted by leading universities indicate that patient comfort, and therefore, patient CPAP compliance, is higher with machines that use C-Flex. C-Flex is a technology invented by Respironics, is proprietary, and is not available on other brands of CPAP Machines.
C-Flex only works at the start of an exhale. Bi-Flex works during the transition from exhalation to inhalation, the transition from inhalation to exhalation and during exhalation.
C-flex drops the pressure on exhale only. A-flex drops the pressure on the exhale but also helps with the transition from inhale to exhale.
Exhalation relief is a comfort feature offered by two manufactures which reduces the air flow at the time of exhalation making the breathing process more natural. Respironics = C-Flex, C-Flex+, A-Flex and Bi-Flex Resmed = EPR (Expiratory Pressure Relief)
The ramp button on a machine is a feature that allows for a gradual pressure build-up to your prescribed pressure. The feature is enjoyed by those with high pressures because they ease up to their pressure.
A BiPAP machine which is also referred to as BiLevel or VPAP, delivers two separate and distinct pressures; that being a higher pressure when the patient inhales and a lower pressure when they exhale. The machine alternates between the two set pressures which are set per the doctor's order or prescription. A prescription for a CPAP machine may not be used to purchase a BiPAP machine. An example of an Bi-Level is the Phillips Respironics PR System One 60 Series Bi-PAP with Bi-Flex.
Some CPAP users find it more pleasant to breath with APAP than with CPAP because the pressure automatically changes as needed to deliver the minimal pressure needed. With a CPAP, on the other hand, the pressure is set at the highest necessary to keep the airway open, even though the high pressure is needed only a fraction of the time.