busybee

After the first few days with the ring I was finding my sleep to be pretty awful, and I was noticing that I was waking up quite frequently. Some of it seems to be due to apnea coming and going, but last night while just lying in bed totally awake I started getting “please move” vibrations even though I was definitely breathing, and the ring said my SpO₂ was a perfectly-healthy 98%.

But! My heart rate was dropping under 45, which was the configured notification for that.

I’ve always had issues where I’ll stop breathing in the middle of the night, but I don’t snore. Sometimes I wake up gasping for air. I’ve suspected central sleep apnea for a long time.

Several years ago I had an in-home sleep study, where they hooked up an SpO₂ meter to me and recorded it overnight. There were a number of drops throughout the night, indicative of apnea in general, and as a result I was provided a CPAP machine (on the assumption that it was obstructive, rather than central, apnea).

The CPAP machine didn’t really help much (if at all) and I kept trying to make it work over the next few years. Then due to a change in insurance I needed to get another study to get authorized for continuing the prescription, and they said that the CPAP machine wasn’t helpful for whatever my sleep issue was. I ended up selling it on the used market.

But I was still having apnea issues, and a lack of restful sleep.

Over the past few weeks it’s gotten especially bad, and after someone was evangelizing the Oura ring, I looked into continuous monitoring solutions. I’ve had a cheap finger monitor for years, which has been helpful for spot-checking but is uncomfortable to wear to bed, and also doesn’t record a log, making it less useful for diagnosing issues.

Oura is pretty expensive (and now requires a $6/month subscription plan) and doesn’t do continuous SpO₂ monitoring (it only does momentary checks, similar to the current Apple Watch), but perusing other reviews and half-remembering a few videos I’d seen years ago, I eventually came across the Wellue O2ring, which is a continuous monitor which logs SpO₂, heart rate, and movement all night long, and can also send a little vibration to your finger whenever the SpO₂ drops below a configurable threshold.