What is a CPAP machine and how does it work?

You’ve probably heard about sleep apnea and CPAP therapy by now. Your relative or your friend may have sleep apnea and have talked about their experience using CPAP. But what exactly is CPAP?

CPAP stands for Continuous Positive Airway Pressure. CPAP therapy is considered the “gold standard” for treating obstructive sleep apnea (OSA) and has been available for 30 years. It refers to the pressurized air that is delivered through a special delivery system which utilizes a mask.

People with sleep apnea receive a prescription for their air pressure setting (which is determined during a visit to the sleep lab) as well as a prescription for the specialized machine and equipment used to deliver it.

What is a CPAP machine?

The CPAP machine is basically a small box which has a motorized fan inside. This fan very quietly draws air from the room, gently pressurizes it, then delivers it at a setting specific to your needs.

The air intake section of the CPAP machine has a filter on it to eliminate the intake of dust, smoke, or other impurities in the air. This filter can be replaced as necessary.

Another key part of the CPAP machine is the humidification chamber built into the box. This is where water is warmed to humidify the pressurized air before it is delivered. Warm, moist air soothes your nasal and upper airway passages and helps prevent swelling and discomfort that can sometimes occur while using the therapy. Although using humidification is optional, it brings relief for the majority of patients using CPAP therapy who live in dry or arid climates or who wake up with a dry mouth, nasal passages, or throat. The humidification chamber is pretty easy to keep clean and should last the lifetime of the machine itself.

Attached to the cpap machine is a hose which connects the box to the mask. This flexible, lightweight tubing is also typically heated to reduce any condensation that might collect inside it while the humidifier is in use. The hose is long enough—around 6 feet—to give you full movement during sleep. Hoses can wear out over time and should be replaced as necessary.

That leaves the CPAP mask. It is often said that the success of CPAP therapy often rests on how comfortable and well fitting the mask is. As we discussed recently in our blog, CPAP masks come in a variety of shapes and sizes to suit the vast array of facial landscapes. Masks wear out over time and should be replaced on a regular schedule.

CPAP machines, finally, are fairly compact and can easily fit on a standard nightstand. They are pretty easy to keep clean and, with regular maintenance and care, should last you a long time.

But how does CPAP work?

Buy cpap machine People who have sleep apnea have problems with keeping the airway open for normal breathing as they sleep. Mostly commonly, the soft tissue in the throat and oral cavity (the tonsils or tongue, for instance) relaxes and/or collapses, closing off the space needed for air to move through the nose and into the lungs. This leads to pauses in breathing that can happen consistently enough, and long enough, to deprive the bloodstream of the oxygen it needs to deliver to all the organs.

The brain senses this drop in blood oxygen and forces an awakening. However, some people can experience more than 100 of these pauses and awakenings per hour for most of the night! It’s no wonder why some people with severe sleep apnea feel so tired all the time.

If this interrupted pattern of breathing is left untreated, it can create long-term health problems for the sufferer. To learn more about sleep apnea, see our recent post on the subject.

CPAP was created to help keep these pauses from happening. The machine, by way of the tubing and mask, delivers a stream of pressurized air as a kind of “pneumatic splint” to help prevent the collapses that are characteristic of obstructive sleep apnea. By helping to keep the airway firm and open, the pressurized air provides the support necessary for the user to breathe freely and without obstructions.

Some people, when they start CPAP therapy, discover almost right away the relief of sleeping all night long without waking up once. Others may take their time to adjust, which is more typical.

One thing remains true for both types of users: the more they use it, the easier CPAP becomes to use, and over time, they find it a welcome luxury to use their CPAP machine, as it returns to them the good nights of sleep they had been missing out on for years.