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Adjusting pressure downward on APap

Posted by SleepyTimeGal on June 02, 2004 at 10:52:14:

My prescribed pressure on CPAP is 16. In late April I purchased an autopap with the pressure range set between 14 and 20. As I monitored each night's readout, I noticed that it rarely went above 14 during the night, so I lowered the bottom pressure.

I've now done this a couple of times with the lower pressure now set at 10.8. Each time, my nightly breathing pressure diminishes to just above the low setting. Last night the pressure was 11.8 95% of the time. My AHI remains constant at 0-3 per night, rarely going as high as 5.

I have not lost weight (wish I could!), nor have there been any other lifestyle changes I can think of that would affect the pressure. In fact, my allergies have been particularly bad off and on this season.

Some questions: Is there any harm in lowering the pressure as I've been doing?

Has anyone else experienced a lowering of pressure after going from CPAP to autopap?

Is there any explanation for what is happening? (Other than incorrectly prescribed pressure to begin with; I understand that a sleep study is a one-night only snapshot of what goes on.)

Thanks.

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