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Do I have to readjust pressure settings after losing weight?
#1
Do I have to readjust pressure settings after losing weight?
Hi,

I have been using CPAP for almost two years now, after some trial and error and the help of some members of this forum I managed to succesfully set the settings to my machine. For the last one year and a half I had the following settings to my machine:


ResMed
AirSense 10 AutoSet
PAP Mode: APAP
Min 7.6 Max 14.0 (cmH2O)


I didn't have any problems so far (apart from some leaks every now and then) and my AHI was almost always below 1. The last months I have lost some weight, 10kg (22 pounds), and the last two weeks my AHI has increased slightly to 2-3 with most of them being CA. I am waking up really tired everyday the last days and I am wondering if my weight loss affected my pressure needs at all. Just to try it I have reduced my min pressure to 7.2 a few nights ago and didn't see any improvement (if not worse). I have attached a screenshot of my data from yesterday night. Do you have any clue if I need to adjust my seetings again? Thanks!


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#2
RE: Do I have to readjust pressure settings after losing weight?
I don't see a need for lower pressure in your current results. With a minimum pressure of 7.2, maximum 14 and EPR 1 you are above the minimum for the entire night based on flow limitations and what appears to be a persistent leak, mostly below the large leak threshold. The pattern of CA events is not typical for someone with hyperventilation or physiologic related CA events, and appear to be more related to sleep arousals. Hypopnea is also present and hard to tell at this scale whether they arise from flow limitation or are more central in nature. My impression is that you might benefit from an increased EPR setting of 2 and maybe a new mask or improved mask fit. Congrats on the weight loss, but it appears mask fit has been affected.

You may want to edit your profile in the User CP and update your machine settings.
Sleeprider
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#3
RE: Do I have to readjust pressure settings after losing weight?
(05-03-2022, 07:02 AM)Sleeprider Wrote: I don't see a need for lower pressure in your current results. With a minimum pressure of 7.2, maximum 14 and EPR 1 you are above the minimum for the entire night based on flow limitations and what appears to be a persistent leak, mostly below the large leak threshold. The pattern of CA events is not typical for someone with hyperventilation  or physiologic related CA events, and appear to be more related to sleep arousals. Hypopnea is also present and hard to tell at this scale whether they arise from flow limitation or are more central in nature.  My impression is that you might benefit from an increased EPR setting of 2 and maybe a new mask or improved mask fit.  Congrats on the weight loss, but it appears mask fit has been affected.

You may want to edit your profile in the User CP and update your machine settings.

Thanks, last night I tried setting min 7.4 and max 14 with EPR 2 and reducing my leaks. I feel kind of ok today although not perfect but I still got more CA apneas than usual. Do you think it is a good idea to keep these settings for now?


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#4
RE: Do I have to readjust pressure settings after losing weight?
With CPAP we are more concerned with the efficacy of treating obstructive events, and will try to avoid triggering centrals by avoiding excessive ventilation. CPAP does not treat CA so unless they are a problem, we tend to ignore them and they typically diminish as you adapt to the therapy. Becoming comfortable and feeling better can be a gradual process, so be patient. I think sticking with these settings is fine for now. The remaining obstructive events are spread out through the night with a bit of a chin-tuck at 05:15 and some flow resistance as you began therapy at the beginning of the night which drove pressure upwards. The improvement in leaks is probably a major factor for reducing sleep disruption.
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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