PulseOx cyclicality

[mishfit]

So, I started using a pulseox (Wellue checkme) during sleep the other night, and in deep sleep, there is a very clear cyclicality to the readings with a frequency of about one minute (I was typically 90-95). Pulse rate appears to be inversely related. I don't understand why this is. It appears to be a real effect since pulse varies as well, but I can't come up with a simple reason for variations over a minute. Is it an artifact of the measurement? if not, can anybody explain?

FWIW, I've noticed a similar pattern when I've used oximeters at very high altitude. I always assumed it had something to do with the device.

Cheers!

[sheepless]

not much info to go on. best if you post some OSCAR screenshots of the cpap & oximeter data. meanwhile a stab in the dark: 'cyclicality' sounds similar to 'periodicity'. periodic limb movement can increase respiration rate & I assume affect O2. comparing 02 readings with cpap flow rate might be instructive.

[Crimson Nape]

You are probably using the Checkme Browser Pro​ app for your primary analysis. Can you provide any screenshots to demonstrate what you are describing?