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by -SWS
Sun Sep 08, 2013 11:22 am
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

A schematic that may prove helpful is taken from the Respironics V60 OK, so here's the Trilogy schematic: http://i186.photobucket.com/albums/x256/sleepydave/trilsole_zps8edc28aa.jpg making Guest's earlier comment about having only "a" solenoid valve venting "the" control pressure sensor (as opposed...
by -SWS
Sun Sep 08, 2013 10:27 am
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

Another night, another morning. Uneventful again. As has been typical in the last few days, I stayed on my side until about the last hour... The max EPAP was set to 12, but last night it barely hit 11 with the average being just above 9. Mollete's opinion that it isn't seeing much to change seems v...
by -SWS
Sat Sep 07, 2013 10:10 pm
Forum: CPAP and Sleep Apnea Message Board
Topic: Tapatalk Support On CPAPtalk
Replies: 35
Views: 6757

Re: Tapatalk Support On CPAPtalk

I don't think Tapatalk PM's ever worked on this message board:

viewtopic.php?f=1&t=80671&st=0&sk=t&sd= ... 1b#p736306
by -SWS
Sat Sep 07, 2013 7:50 pm
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

Sounds like a plan! I'd suggest keeping an eye on minute ventilation as well. So far tidal volumes have stayed good, but breath rate has gradually dropped just slightly. For all we know your breath rate is normalizing. When either tidal volumes or breath rate drop---while the other parameter stays m...
by -SWS
Fri Sep 06, 2013 7:43 pm
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

That schematic appears to be about nulling any pressure differential between the machine's main pressure/internal-sensor line and the proximal end sensor and line---by bringing both line-and-sensor sets to ambient pressure. I suppose that explains why we never see those spikes to 0cm on BiLevel mach...
by -SWS
Fri Sep 06, 2013 3:17 pm
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

That spike to 0 is a ventilator triggered breath. If so, I'll have to guess Trilogy does the auto-null purge right before a ventilator triggered breath. The auto-null routine would purge unwanted static pressure so that the backed up breath is delivered with the right IPAP level. If IPAP is inadver...
by -SWS
Fri Sep 06, 2013 12:25 pm
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

That spike to 0 is a ventilator triggered breath. My patient triggered breaths are lower than hers, so mine spikes to 0 more. I believe most ventilators have that downward spike indicating the vent is giving a breath. I usually use PC-SIMV, but have ran the trilogy in timed mode and all breaths spi...
by -SWS
Fri Sep 06, 2013 7:26 am
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

Since they seem to behave independently of the flow, these must be that Auto-Zero of the Solenoid that we were talking about before. http://i186.photobucket.com/albums/x256/sleepydave/flow_zpsd6d629e8.jpg Those 18 brief pressure spikes to 0cm nicely fit the pattern of how an auto-null solenoid valv...
by -SWS
Thu Sep 05, 2013 8:33 am
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

A couple of discussion points: Since the settings on this night look to be EPAP min 9.0 cmH2O EPAP max 10.0 cmH2O, these tight restraints do not allow us to see exactly how the algorithm works (i.e., the aforementioned graphic suggests there will be 2 P opt / P crit routines before it decides wheth...
by -SWS
Wed Sep 04, 2013 9:49 pm
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

So since this is about Auto EPAP (the AE of AVAPS-AE), mayhaps a closer look might prove fruitful. This is a view of 2 hours (~1200-1500 breaths) so the individual breaths are lost. However, the EPAP (lower baseline) behavior can be seen: http://i186.photobucket.com/albums/x256/sleepydave/AVAPSAE_z...
by -SWS
Wed Sep 04, 2013 12:25 pm
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

Yup.
by -SWS
Wed Sep 04, 2013 11:59 am
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

The graph in my post above was originally provided by Mollete. He posted that graph right after you made EDF files available in your dropbox.
by -SWS
Wed Sep 04, 2013 9:40 am
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

You kids are going to love this. The pulsations occur in a pattern: The beginning of an EPAP change. The end of an EPAP change. In the middle of the changes. As if it were an auto-EPAP design characteristic of some type... I concur that I see pulsations in the pattern you described. I see three suc...
by -SWS
Tue Sep 03, 2013 7:45 pm
Forum: CPAP and Sleep Apnea Message Board
Topic: AVAPS-AE on MY Trilogy - Ongoing
Replies: 280
Views: 76246

Re: Trilogy AVAPS-AE - Ongoing

If it's any consolation, this message board has a few people who cannot tolerate Resmed's S9 FOT (small-amplitude sinusoid), and a few more who cannot tolerate Respironics' non-FOT airway-patency detection method (a single square-wave pulse). Most people can't feel those two airway-patency detection...