dsm wrote: What is interesting to me is that this unit uses a 'dual impellor' design - how about that - 'A twin jet turbo Bilevel xPAP'
-SWS wrote: This machine takes advantage of adaptive servo ventilation to primarily treat Cheyne Stokes central apneas. Instead of the usual passive exhaust venting that happens in the mask, adaptive CO2 ventilation is actively orchestrated by a dedicated adaptive servo circuit in this machine. Higher retained CO2 on an as-needed basis is what staves off Cheyne Stokes central apneas, and apparently other central apnea sub-phenotypes as well.
My posts above mention that this machine focuses primarily on what is known as CSR or Cheyne Stokes breathing patterns. The last time I read white papers regarding the AutoSet CS was perhaps two years ago. This machine has been very successfully used in Australia for CSR for a couple years now. At that point only CSR had been mathematically characterized and treated within the designed constraints of the AutoSet CS algorithm. However, a few minutes ago I carefully read the Resmed marketing sheet for this AutoSet CS and was pleasantly shocked to see that the machine is now purported to treat all forms of central apnea, with emphasis on CSR, CSDB, and mixed apneas. Mixed apneas, CSDB central apneas, and CSR central apneas are all sub-phenotypes of central apneas that generally respond well to CO2 correction.
This AutoSet CS has several algorithmically driven modalities of operation. For CSR, positive pressure support may or may not be beneficial depending on whether obstructive SDB events happen to also be present. Thus this machine can be set in a mode to treat CSR without PAP support or to treat CSR with PAP support. In that first case CSR periodic breathing and central apneas will be algorithmically addressed with two separate adaptive servo techniques. In that second case CSR periodic breathing, central apneas, and obstructive SDB events will be algorithmically addressed with three dedicated and corresponding adaptive servo ventilation techniques.
dsm wrote: What do you make of the 'proximal' (to the mask) sampling of pressure ?
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