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SPO2 Assistant crazy event or unit error?
#1
SPO2 Assistant crazy event or unit error?
I have been logging my overnight pulse/oximetry with a Contec CMS50F about once a week for 6 weeks to see how cpap therapy is affecting those numbers. Last night, about 5 am, I woke up startled, which used to happen most nights before I began cpap. I got back to sleep once I settled back down. In the morning, I looked at my data, and there was a spike where my pulse shot up above 120 and my oxygen spiked down to 64%, as shown in the zoomed in SPO2 Assistant screenshot. There were zero breathing events within half an hour before or after this. I certainly felt unsettled when I was woken up, so I wouldn't be surprised if my heart were racing for a few seconds. However, my breathing wasn't interrupted/paused/strained, and the pulse/ox numbers surrounding this 'event' are quite normal. 

Is this a device error? If not, what might cause that level of desaturation for such a short time? Nothing below 80% showed up in any other time I've tracked oximetry myself or in my 2 sleep studies.

I've attached the SPO2 report, as well as the SleepyHead data zoomed in around this time. I see there is a pause in breathing right after the SPO2 event short enough to not be labeled as an apnea event, and the clocks could be off by as much as 2 minutes, so these [could be/are likely] associated.


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#2
RE: SPO2 Assistant crazy event or unit error?
Looks like you were moving around and it jiggled the wire. I'd disregard it.
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#3
RE: SPO2 Assistant crazy event or unit error?
I agree with Walla Walla. What you are referring to is called an artifact. It can be caused by rapid movement or bumping of the sensor.
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