Frequently Asked Auto CPAP Questions
What are the advantages of auto titrating devices?
AutoPAP devices adjust pressure on a breath-by-breath basis to suit patient needs as they change throughout the night. As a result, patients receive the minimum pressure required for effective therapy. The lower average pressures improve comfort, reduce pressure-related side effects, and lead to more consistent use of therapy.
How do AutoPAP devices know to adjust pressure?
After you fall asleep and your pressure needs begin to vary, your AutoPAP device responds to three separate parameters: inspiratory flow limitation, snore, and apnea. AutoPAP devices act preemptively by increasing pressure in response to inspiratory flow limitation and snore, both of which typically precede obstructive apneas. The AutoPAP device calculates the pressure you need based on the severity of the event. This early intervention prevents obstructive apneas and reduces respiratory arousals.
How do the AutoPAP devices handle hypopnea events?
AutoPAP devices respond to obstructive hypopnea events when they are associated with flow limitation or snoring. Hypopneas that are central in origin (related to your central nervous system, not physical obstruction) should not be treated with increased pressure.
Why do AutoPAP devices work with only some masks? Why not all masks?
This is a more difficult question to answer. The short answer is that all masks have different physical characteristics and an AutoPAP device needs to know the specific characteristics of a mask for best performance. AutoPAP devices respond to conditions like leak, snore, and inspiratory flow limitation. To properly treat a person with obstructive sleep apnea (OSA), an AutoPAP device needs to know exactly how much of the conditions it detects come from the mask. All masks have some degree of leak to ensure users get fresh air. All masks also have some degree of resistance by virtue of their materials, contours, and leak. So using a mask that is "unknown" to the AutoPAP device won't let it do its job properly.
I hear that APAPs work only for people on low to moderate pressures, is this true?
Actually, the opposite is true. According to a recent study, AutoPAP technology provides the greatest benefits for people on 10 cm H2O or more.
How fast do AutoPAP devices evaluate and respond to changes?
AutoPAP devices evaluate flow limitation on a breath-by-breath basis and adjust pressure according to a three-breath average.
Can I request that my doctor prescribe an AutoPAP device? Will that get my insurance to pay?
Your doctor has the ability to prescribe an AutoPAP device, but you will have to ask your insurance company whether or not they will cover it. A letter of medical necessity from your doctor would also improve your chances of getting your insurance to pay for the device.
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