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[Treatment] Question about Insp. Time
#1
Question about Insp. Time
Following advice I changed the pressure from 16/12 to 16/13. I changed start ramp pressure from 8 to 9 because I felt I was not getting enough air during the start of ramp. The change to start ramp pressure helped. The DME changed the mask from F20 large to F20 medium on Thursday. The leaks are high but getting better. 
My question has to do with Insp. Time. It is set to 2.0, I have noticed the pressure support dropping before I have finished breathing in. SleepyHead shows 95% insp. rate is 2.00.
Should I increase the Insp. Time, if so how much?

Again thank you for all the wonderful help provided.

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#2
RE: Question about Insp. Time
You can adjust the Ti Min in the clinic menu. Try increasing it a little at a time until you feel comfortable. This increases the time you spend in IPAP mode.
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#3
RE: Question about Insp. Time
When I increase Ti Min does that shorten epep time?
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#4
RE: Question about Insp. Time
No it just increases the time in IPAP. If you wanted to shorten the EPAP time you would decrease the rise time setting.
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#5
RE: Question about Insp. Time
I use TiMax of 2.2. All you can do is give it a try and see if you find that more comfortable. Remember that TiMax only means the IPAP will be sustained that long unless you spontaneously cycle. If you start to exhale before that, the machine will cycle to EPAP. Your 'feeling' that the machine is turning off IPAP at 2.0 is correct. Just don't go overboard with the TiMax and increase in small increments. FYI, my 95% inspiration time is about 2.14 and max is 2.2. Median is generally less than 1.5. So my settings feel like a pretty good fit.
Sleeprider
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#6
RE: Question about Insp. Time
Sorry I guess I got that backwards.
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#7
RE: Question about Insp. Time
(03-18-2018, 07:41 AM)Walla Walla Wrote: No it just increases the time in IPAP. If you wanted to shorten the EPAP time you would decrease the rise time setting.

Increasing TiMin has very little effect on most people. The default is something like 0.3 seconds and it rarely comes into play.  A significant change in TiMin might be used for someone that chronically has very short inspiration time, to encourage more time and volume in inspiration.  I have rarel seen TiMin altered for anyone on the forum.  

Rise time is the time in milliseconds that it takes for the machine to trigger from EPAP to IPAP.  Very short rise times are frequently used for people with restrictive lung disease (COPD) where longer exhale times are needed.  That seems counter-intuitive, but by filling the lung faster with a short rise time, the idea is to allow more time in expiration. I may be wrong, but I think rise-time is only adjustable on the Philips units when BiFlex is disabled.  So it's used for specialized needs, but as you note, not what we're trying to do in this thread.
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____________________________________________
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#8
RE: Question about Insp. Time
Your right about the Philips and rise time when the Biflex is disabled. It does work in Auto Bipap though, unlike the VAUTO.
But it doesn't matter here with a ResMed fixed pressure Bpap.
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Advisory Members serve as an "Advisory Committee" to help shape Apnea Board's rules & policies.

Membership in the Advisory Members group does not imply medical expertise or qualification for advising Sleep Apnea patients concerning their treatment.



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#9
RE: Question about Insp. Time
Default rise time is 300 ms. I think I have read that with COPD a shorter rise time is recommended to decrease rise time, leaving more time for exhale.
Sleeprider
Apnea Board Moderator
www.ApneaBoard.com

____________________________________________
Download OSCAR Software
Soft Cervical Collar
Optimizing Therapy
Organize your OSCAR Charts
Attaching Files
Mask Primer
How To Deal With Equipment Supplier


INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#10
RE: Question about Insp. Time
Thanks. I will increase slowly/ Tonight I will go to 2.2

Gerry
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