What is a CPAP Machine? CPAP (Continuous Positive Airway Pressure) machines are the most commonly used devices to treat breathing disorders such as Obstructive Sleep Apnea. CPAP Cushions The purpose of the CPAP machines are to restore your quality of breathing by allowing constant airflow through your airways without having the restrictions caused by Sleep Apnea, therefore eliminating interrupted breathing while sleeping. CPAP machines are devices that regulate the amount of air pressure that is released in order to open your airways while sleeping. The amount of air that is released on a constant basis is determined by your physician upon completion of your sleep study. These consist of the following parts: the CPAP machines itself, at least a six foot hose, power cord, at least one or two filters, and instruction manuals. The mask will not be included in most cases, and will have to be purchased separately. It is not uncommon for a manufacturer to also include a case for your machine. Replacement parts are also available for purchase if necessary. All CPAP machines use distilled water only. Therefore, when traveling whether it is a cruise, or airline, just make sure that you take the necessary measures to be able to take it including distilled water with you as most airlines will not allow it. And, speaking of traveling, don't stress too much about taking it with you as they also come in a small travel sizes, and are easy and convenient to transport. You can take whichever you like. What is the difference between a CPAP and APAP? The difference between the CPAP and APAP machines is that the CPAP allows the same amount of pressure constantly to assure the opening of the airways, and is usually set at the highest setting, whereas, the APAP changes pressure automatically delivering minimal pressure. What is a BiPap machine? The BiPap or Bilevel machine uses two different pressure settings for each patient. The BiPap machine is used to treat more severe breathing conditions than Sleep Apnea. Unlike the CPAP that supplies a constant stream of air pressure to clear the airways, the BiPap detects just how much pressure is needed for the individual to receive an adequate supply of air during inhalation and exhalation.