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deltadave wrote:

JohnO wrote:I actually don't see a count on the report. From my pre-CPAP and post-CPAP SpO2 monitoring, a typical night before CPAP would have more than 200 desaturation events. Afterwards, maybe 1 or 2, but no drops below about 94%. I've got some graphs I might upload with that info.

I'd love to see them.

The NPSG desaturation(s) above are atypical (ya THINK?) of OSA.

If it isn't a PFO (BTW, PFOs in OSA patients are frequent) then it could be poor signal quality that should have been addressed at the time of acquisition.

PFO is actually the measurement from the little O2 looking cannula in your nose in both a PSG and EEG, the CPAP mask takes the place of the reading.

BRPTsleeptech wrote:

deltadave wrote:

JohnO wrote:I actually don't see a count on the report. From my pre-CPAP and post-CPAP SpO2 monitoring, a typical night before CPAP would have more than 200 desaturation events. Afterwards, maybe 1 or 2, but no drops below about 94%. I've got some graphs I might upload with that info.

I'd love to see them.

The NPSG desaturation(s) above are atypical (ya THINK?) of OSA.

If it isn't a PFO (BTW, PFOs in OSA patients are frequent) then it could be poor signal quality that should have been addressed at the time of acquisition.

PFO is actually the measurement from the little O2 looking cannula in your nose in both a PSG and EEG, the CPAP mask takes the place of the reading.

Not even. PFO is "patent foramen ovale":

http://www.ncbi.nlm.nih.gov/pmc/article ... p00880.pdf

jweeks wrote:Congrats on being off an running on such a great start.

Thanks John - I especially appreciate your early info early on regarding option in the Twin Cities.

deltadave wrote:

JohnO wrote:From my pre-CPAP and post-CPAP SpO2 monitoring, a typical night before CPAP would have more than 200 desaturation events. Afterwards, maybe 1 or 2, but no drops below about 94%. I've got some graphs I might upload with that info.

I'd love to see them.

Here are two summary strip charts from a CMS-50E. I recorded about 6 weeks of data prior to my sleep study and subsequent acquisition of an auto-CPAP machine. I've recorded about 5 nights since.

The "before" strip is a pretty typical example.


So is the "after" strip.


John

Given your data, it would appear more likely that the baseline drop during NPSG was due to equipment issues (inadequate sensor signal, reduced circulation from sleeping on arm, etc.):



At any rate, I would have expected the technician to intervene to attempt to improve signal quality.