(02-21-2019, 01:44 PM)Technopauper Wrote: Sorry.....and another thing :-)
Jas - having tried both and ST and ASV, how would you describe the difference in how the treatment feels and perhaps how different you felt with ASV versus ST - trying to better understand why you went ASV if ST also treated your apnea ?
I will now stop spamming my own thread !
Rob
First a typical graph from my Autoset AHI of 10 a good night a bad night would have an AHI of 30 all clear airway in a very tight time frame, zoomed in on the flow you can see the periodic breathing during REM sleep
The blast of air from the ST on every breath was like being kicked in the teeth when I first tried it I raised the rise time to 300 ms to make it comfortable i was on a 30 day trial it reduced my worst night AHI from 30 CA’s to about 10 Hypopnoea.To get better results than that I would have needed to increase the pressure support further from the 8cm of pressure support prescribed.
Graph of the ST treating my periodic breathing you can see the square pressure waves and how it tries to create a breath but fails causing the chair shaped flow limited breath AHI was 12 on this night
An ASV follows your breathing it raises the pressure support from 3 to 15 if needed and does nothing at all other times. At the start just as you are about to fall asleep the ASV thinks you are stopping breathing and gives you a blast of air, it’s disconcerting and wakes you up. Using the blowback technique causes the ASV to backoff for 3 minutes and by that time I am asleep.
ASV graph AHI 0.0 you can see the blue mask pressure line raising upto 15cm to fill in my breaths, the pressure form is curved and very comfortable, you can see the effect on the flow graph, the ASV is trying to keep the flow volume the same, the flow is reduced in some areas but no desaturation
I hope this is useful I have also attached a summary of my full treatment history just so you can see my treatment history, the initial purple is CA's on an Autoset the Blue AHI rise during August was the 30 day trial on the ST, before that and after was on a self purchased Resmed S9 VPAP Adapt
Jason