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Re: CPAP machine data interpretation

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Posted by Bird Watcher on March 28, 2009 at 19:03:40:

In Reply to: CPAP machine data interpretation posted by sleeper on March 28, 2009 at 08:20:45:

Leak - depends on the manufacturer of your pap and you didn't say what make and model you have, but usually less than .4 liters per minute.

AHI - Apnea Hypopnea Index - less than 5 is good and less than 3 is better. It is close to impossible to be below 1. You'll see higher numbers if you're using a FF mask. Some people can't get below 8, but still are doing better than if they didn't have the machine. If you're above 10 you need to go back to the dr and figure out what's going wrong.

AI - Apnea index - this should be zero on an auto adjusting machine since its the machines job to sense flow restriction and up the pressure to prevent airway closer (obstructive apnea), but the machines usually measure some apneas, which are probably central apneas. Respironics and ResMed Auto's can't tell between central and obstructive apenas and just record it as an apnea.

Tidal Volume, snores, EPI - out of these three the only one of any interest would be snores, which should be low since you have an auto-adjusting machine and should not be snoring.

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