AHI from sleep labs different from auto machine results

[lizkay]

Is it correct that the AHI number in a sleep lab report is calculated from the events divided by the hours actually slept, while the AHI on the report from a RemStar Encore report is the events divided by the blower time? So, if the machine is running, but I am awake a lot of the night (and I would not be having events while awake) my AHI will appear to be better=lower than on nights when I sleep more and have events while sleeping, given the blower time is the same? So, how reliable are the numbers unless I am asleep the same amount of time? And, I wake up 10-15 times a night that I know of, even with CPAP.

[Wulfman]

In my opinion, a person has to take both situations with a grain of salt. One night of lousy sleep in a sleep lab vs. every night in the comfort of one's own bed but maybe some false readings......??? I'll take the comfort of my own environment ANY night!!!

Den

[billbolton]

In my opinion, a person has to take both situations with a grain of salt.

I strongly agree!

Cheers,

Bill

[ozij]

Ditto.

O.

[jskinner]

Is it correct that the AHI number in a sleep lab report is calculated from the events divided by the hours actually slept, while the AHI on the report from a RemStar Encore report is the events divided by the blower time?

That is correct.

So, if the machine is running, but I am awake a lot of the night (and I would not be having events while awake) my AHI will appear to be better=lower than on nights when I sleep more and have events while sleeping, given the blower time is the same?

Correct.

[Goofproof]

That's why you are suppose to use the machines to sleep with, not to watch T.V., read a book, pet the Kitty, ect.

IF your blower time was 8 hours, and you laid there trying to (play) the machine instead of sleeping for 2 hours, you just count the events for the last 6 hours. and divide by 6, instead of 8. Jim