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Central Sleep Apnea, Anyone try supplemental O2 via nasal canula
Sleep Health | Last Active: 4 days ago | Replies (22)Comment receiving replies
I initially took a home test (Sept.) followed by a week trial of Resmed Airsense 11 which I did not tolerate due to exhalation anxiousness. I was scheduled for poly (Nov.) with report mid. Dec. While waiting I bought a Wellue ring (using since Sept.) . I also bought an O2 concentrator received in late Dec.
Poly report 5 obs, 2 mixed and 35 central. Hypopneas 240, for AHI 51.3/hr. , SpO2 nadir. 78%, Cheyenne Stokes present, moderate PLM index 41/hr., frequent PVCs.
I do not think the bi-level is the answer but will do the free trial, 3 weeks usage, then overnight poly titration.
Meanwhile using O2 I see 4%+ events always under 5 and a few under 1 per hour. O2 mostly over 95%, seldom under 90%.
I see the issue you point out of suppressing CO2 using O2 (set for 2/l per hr.). That puts out 78% O2. I will play a bit with that but with only oximeter data how to measure results may be tough for a layman.
My basic question is "if low O2 is harmful to heart and tissues, even if high O2 suppresses CO2 and affects the O2/CO2 cycle (and apparently prevents loop gain cycles) why should I care. In other words as long as O2 is high what's the harm. I am concerned I am missing something.
Regards
Replies to "I initially took a home test (Sept.) followed by a week trial of Resmed Airsense 11..."
Bi level is probably not the answer.
If you have central Sleep apnea then the ASV machine would be the best.
I don't know enough about just using O2 but my doctor would not try it.
Its a very complicated system with all kinds of feed back loops. Loop gain etc.
With me, everything would be going good, nice in and out flow and then something would disturb it (?? leg movement??) and a big breath would come in and the system would over react then over react to that so you end up with big overshoots up and down and finally, stop breathing all together. eventually, one of the back up systems kick in and you start breathing again, but possibly back into the cycle again. Thats what happens with Cheynes Stockes pattern. The ASV machine watches you and then trys to predict when you are going to overshoot and intercept it. Its pretty wild to see what it tries to do. I have good insurance but I would buy an O2 concentrator if it would help. Insurance would only pay if O2 drops to like 75 or someting.
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What you are missing, possibly, is what I was missing. I didn't know I had severe OSA until my cardiologist sent me to various imaging facilities, and finally to a sleep lab when none of them showed any abnormalities or ischemia. The polysomnography showed I had severe obstructive sleep apnea, and THAT is what caused my atrial fibrillation.
Disrupted sleep, for any reason, is poor sleep...hardly sleep at all. Each time you have an event, whether merely a RERA (respiration effort related arousal), a flow limitation, or an outright obstructive event, and it lasts for more than 10 seconds, your machine will duly note it and it will become part of the record next morning. To that end, if you ever find yourself using a RESMED again, consider going to apneaboard.com and downloading the (safe, constantly improved) freeware called 'OSCAR'. It will allow you to remove the SD card from your PAP machine, insert it into a slot/reader/ and OSCAR will look for it and ask if it can download the data (you'll have to create an account in OSCAR first). You're an engineer, you're used to reading data and making sense of it, and you use graphic depictions for their value as well. OSCAR offers all of that, and then some. You'll find it interesting from its rendering of your recorded data and maybe be able to adjust your machine's settings to get AHI (apnea/hypopnea index) as low as mine, which is an enviable 0.6 average, week-to-week, month-to-month, now running on 7 years.