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> these seem like pretty obvious application of machine learning algorithms, don't you think? Anecdotally, my impression is that most CPAP users are using APAP

> these seem like pretty obvious application of machine learning algorithms, don't you think? Anecdotally, my impression is that most CPAP users are using APAPs at this point, like the very popular Resmed AirSense 10. Titration amounts to giving it a pretty wide range and letting the machine itself figure out the right pressure. It's not a complex learning algorithm, but seems to do the job.

wilsonnb3 2y ago
I think APAP's are more about comfort and less about effectiveness, although making them more comfortable to use does make them more effective. The algorithm is more about detecting that you aren't asleep and thus don't need the full pressure at the moment and less about altering the target pressure setting on the fly. I could be wrong though, I use is a bipap which works a bit differently than CPAP or APAP.
- rootusrootus 2y ago
  I have personal experience with the Airsense 10 and it doesn't detect sleep/awake, as far as I can tell. At least not for me; it starts at low pressure, ramps up over a set time to the bottom of the range, and then adjusts as necessary. Low flow or an apnea event will get it to increase the pressure. Sometimes if you are breathing kinda slow lying there awake you can trip it up and feel it start pulsing the pressure to get more air moving. To my understanding (no personal experience), Philips APAPs have a different algorithm to try and achieve the same goal, and are regarded as less aggressive about it than Resmed. There's also a new Resmed Airsense 11 out but I don't know anything about it and what changed. BiPAPs are definitely a different beast, for sure. My dad used one of those. Not automatic at all, right? Constant pressure, but different between inhale and exhale?
  - wkat4242 2y ago
    The pulsing is not to get the air moving but to see what kind of obstruction event it is. It's quite annoying to me and unfortunately it can't be turned off even in the full therapist menu :(

wilsonnb3 2y ago

I think APAP's are more about comfort and less about effectiveness, although making them more comfortable to use does make them more effective. The algorithm is more about detecting that you aren't asleep and thus don't need the full pressure at the moment and less about altering the target pressure setting on the fly. I could be wrong though, I use is a bipap which works a bit differently than CPAP or APAP.

rootusrootus 2y ago
I have personal experience with the Airsense 10 and it doesn't detect sleep/awake, as far as I can tell. At least not for me; it starts at low pressure, ramps up over a set time to the bottom of the range, and then adjusts as necessary. Low flow or an apnea event will get it to increase the pressure. Sometimes if you are breathing kinda slow lying there awake you can trip it up and feel it start pulsing the pressure to get more air moving. To my understanding (no personal experience), Philips APAPs have a different algorithm to try and achieve the same goal, and are regarded as less aggressive about it than Resmed. There's also a new Resmed Airsense 11 out but I don't know anything about it and what changed. BiPAPs are definitely a different beast, for sure. My dad used one of those. Not automatic at all, right? Constant pressure, but different between inhale and exhale?
- wkat4242 2y ago
  The pulsing is not to get the air moving but to see what kind of obstruction event it is. It's quite annoying to me and unfortunately it can't be turned off even in the full therapist menu :(