5:07pm

Mon August 15, 2011
Shots - Health Blog

Sleep Apnea Makes Quick Comeback If Breathing Treatment Stops

If you use a breathing machine to treat your sleep apnea, it's probably a bit clunky. But it's also probably doing you a lot of good.

In a small study, researchers at the University Hospital in Zurich, Switzerland report that when patients stopped using the continuous positive airway pressure machines (C-PAP), even for one night, not only were they really sleepy the next day, but a flood of related health problems returned.

The findings appear online in the American Thoracic Society's American Journal of Respiratory and Critical Care Medicine.

And they make lots of sense, says Dr. Nancy Collop, medical director of the Emory Sleep Center in Atlanta Georgia. She likens the C-PAP machine to blood pressure medication. If you stop taking your medication, your blood pressure rises. If you forget to use your C-PAP, your sleep apnea will return.

Patients with sleep apnea can awake hundreds of times during a night, gasping for breathe and never really getting a good night sleep. The breathing machine helps patients by pumping air directly into their obstructed airway, essentially forcing them to breathe regularly.

What was surprising in the study was just how quickly problems returned when patients went off the machine. Researchers divided patients into two groups. One used their breathing machines as usual. The other was taken off their regular machine and given another one that pumped less air, making it ineffective. After two weeks, the group on the ineffective breathing machine was experienced a return of a number of health problems related to apnea.

Researchers found a marked increase in blood pressure and heart rate, as well as increased dysfunction of blood vessels inside the heart and certain hormones related to heart disease. CPAP withdrawal leads to a return of obstructive sleep apnea within the first night off CPAP, say researchers.

Dr. Collop says, because the C-PAP machine can be cumbersome, most patients at one time or another will ask her if they really need to wear it every night. But over the years, the machine — which was once the size of a suitcase — has been re-designed and is now about the size of a square box of tissue.

Even so, "C-PAP is a treatment, not a cure," she says. "Unless it's on your nose or over your face, it's not going to be helping you when you're sleeping."

Copyright 2011 National Public Radio. To see more, visit http://www.npr.org/.