hypopnea - Printable Version +- Apnea Board Forum - CPAP | Sleep Apnea (https://www.apneaboard.com/forums) +-- Forum: Public Area (https://www.apneaboard.com/forums/Forum-Public-Area) +--- Forum: Main Apnea Board Forum (https://www.apneaboard.com/forums/Forum-Main-Apnea-Board-Forum) +--- Thread: hypopnea (/Thread-hypopnea--24573) |
hypopnea - jerry1967 - 03-22-2019 Can someone tell me why when hypopnea register on my machine it doesn't raise my air pressure? I have a ResMed Airsense 10 AutoSet pressure is set at 12.6-18 with pressure relief at 1. My numbers are high I need an ASV but don't want to have another test. My AHI is around 15-22 divided among Centrals and hypopneas RE: hypopnea - Gideon - 03-22-2019 Please show some detailed charts where this is demonstrated. RE: hypopnea - Stom - 03-22-2019 (03-22-2019, 02:33 PM)jerry1967 Wrote: Can someone tell me why when hypopnea register on my machine it doesn't raise my air pressure? Does the A10 even respond to hypopneas, per se? Hypopneas are flow restrictions, so I'm wondering if the A10 responds to them based on the flow limitations? Neither ResMed nor this paper on CPAP algorithms use the word "hypopnea" when talking about the A10s response, but I can't tell if they mean to include apneas and hypopneas toghether under "apnea" or if they are being precise and mean apnea only. ResMed clinical guide for the A10: Quote:Obstructive apnea From Treatment of sleep-disordered breathing with positive airway pressure devices: technology update, Karin Gardner Johnson, Douglas Clark Johnson, 2015: Quote:OA/hypopnea response RE: hypopnea - Sleeprider - 03-22-2019 Jerry, in your case the hypopnea are probably central and the machine does not respond to central events. The Resmed machine will respond strongly to flow limitation, which has a characteristic flat or downward slope to the inspiration peak. Since your flow rate is dropping with the hypopnea, but not showing flow limitation, it does not increase pressure. If the hypopnea was due to flow limitation, the algorithm does pick that out and properly raises pressure. You clearly need the ASV. Have you looked at Supplier #2 for their lightly used and new ASV machines? Very good prices. I understand your reluctance to have another sleep test, but your AHI is very high and your auto CPAP cannot resolve this problem. RE: hypopnea - Stom - 03-22-2019 Ah, sleeprider's post highlights an error I made in mine. Hypopneas are reduced inspiration, but not necessarily a "restriction". |