What is ResMed's def of apnea?

DrPepper00 wrote:My DME just called. ResMed is sending them another machine for me to use while they check mine out. Does anyone know where a machine from Washington state would be sent for repair? I hope to get in at least one night of sleep with data before my Dr appt on Fri.

I don't know what Resmed's repair program is, but I would guess they will actually just swap out the machine. You probably will never see your original machine again. When my machine died last summer, after about 9 months of use, the DME supplier just swapped me out for a new one.

DrPepper00 wrote:SH definition is " % reduction in airflow from the median value. 20% works for flagging apneas."

That sounds the same to me. But if they are inverted that would explain the numbers.

That may be the source of the variation. Resmed's document just says "baseline" without defining what that baseline is. If it's the average, rather than median, that could cause a difference. I just looked at several of my graphs in Resscan. Without doing a detailed math analysis it looks to me like the 75% reduction Resmed uses is based on the volume of air moved during every breath, i.e., the integral of the curve. At this point I would put more faith in the Resmed number than the SH number. This is not to say that Mark isn't doing a good job, it's just a recognition that Resmed has been at this for years, and Mark has been at it for only a few months. Mark is trying to reverse engineer the methodology of Resmed, and Respironics. That is a daunting task to say the least. It's kind of like being in a 10 mile trek with only a compass, with the other parties having a 9.9 mile head start and using a GPS!

idamtnboy wrote:

DrPepper00 wrote:. At this point I would put more faith in the Resmed number than the SH number. This is not to say that Mark isn't doing a good job, it's just a recognition that Resmed has been at this for years, and Mark has been at it for only a few months. Mark is trying to reverse engineer the methodology of Resmed, and Respironics. That is a daunting task to say the least. It's kind of like being in a 10 mile trek with only a compass, with the other parties having a 9.9 mile head start and using a GPS!

I might put faith in ResMeds number if it was greater than 0 I am frustrated because I want to be watching the numbers and watching them go down! I was so happy when the DME gave me a machine with therapy data without my having to even ask.

DrPepper00 wrote:I might put faith in ResMeds number if it was greater than 0 I am frustrated because I want to be watching the numbers and watching them go down! I was so happy when the DME gave me a machine with therapy data without my having to even ask.

Yeah, looking at your graphs again I can see why you're kinda' wondering. Have you unplugged your machine to make it do a cold reboot? Do that and see if it makes a difference. If not, maybe there is something haywire with it. But on the other hand, maybe you really are doing a lot better than you expected! I have a lot of short cessations less than 10 seconds so of course they're not counted. And I have quite a few nights with only one event recorded. My AHI dropped close to 1.0 right from the get-go, and has stayed there, so once I started CPAP I have not had any measurable incremental improvement. It all happened at the very beginning!

idamtnboy wrote:

DrPepper00 wrote:I might put faith in ResMeds number if it was greater than 0 I am frustrated because I want to be watching the numbers and watching them go down! I was so happy when the DME gave me a machine with therapy data without my having to even ask.

Yeah, looking at your graphs again I can see why you're kinda' wondering. Have you unplugged your machine to make it do a cold reboot? Do that and see if it makes a difference. If not, maybe there is something haywire with it. But on the other hand, maybe you really are doing a lot better than you expected! I have a lot of short cessations less than 10 seconds so of course they're not counted. And I have quite a few nights with only one event recorded. My AHI dropped close to 1.0 right from the get-go, and has stayed there, so once I started CPAP I have not had any measurable incremental improvement. It all happened at the very beginning!

I unplug everyday when I take out the card to read it. It was unplugged for 36 hrs when the electricity went out on Thurs. Excessive leaks and not unplugging were the two reasons I was given for not recording.