Hello Guest, Welcome to Apnea Board !
As a guest, you are limited to certain areas of the board and there are some features you can't use.
To post a message, you must create a free account using a valid email address.

or Create an Account


New Posts   Today's Posts

Dialysis affecting CPAP data
#1
Dialysis affecting CPAP data
I've been doing home peritoneal dialysis for about six months now, and I noticed an increase in my AHI over that time. This afternoon I realised I could look at one whole year using my OSCAR Statistics page:
   
I started my training late in October and started doing dialysis at home at the end of the first week of November, so we have six months before dialysis and six months doing dialysis. As you can see, my OA hardly changed and my CA increased quite a bit.

My question is "Has anybody else noticed any differences while doing dialysis?"
Apnea Board Monitors are members who help oversee the smooth functioning of the Board. They are also members of the Advisory Committee which helps 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.
Post Reply Post Reply






Donate to Apnea Board  
#2
RE: Dialysis affecting CPAP data
Bump2
Crimson Nape
Apnea Board Moderator
www.ApneaBoard.com
___________________________________
Useful Links -or- When All Else Fails:
The Guide to Understanding OSCAR
OSCAR Chart Organization
Attaching Images and Files on Apnea Board
Apnea Helpful Tips

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.
Post Reply Post Reply
#3
RE: Dialysis affecting CPAP data
.I know dialysis kicks your *** so I'm not surprised.

I'd like to see 10inn flow rate examples from pre dialysis and currently, I'd also expect to see a difference between the night before and the night after dialysis.
Post Reply Post Reply
#4
RE: Dialysis affecting CPAP data
Ah, the home peritoneal dialysis is done every day, Gideon; in my case 3 times a day, others use a machine to do it overnight, every night. So there's no day before or day after.

>>>I'd like to see 10inn flow rate examples

I'm not sure what you like to see here. As far as I can tell, I just have a few more CA than before dialysis, Anyway, let me know
Apnea Board Monitors are members who help oversee the smooth functioning of the Board. They are also members of the Advisory Committee which helps 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.
Post Reply Post Reply






Donate to Apnea Board  
#5
RE: Dialysis affecting CPAP data
Just looking to see if the character of the centrals sho in the flow rate.
Admittedly I am unfamiliar with home peritoneal dialysis. I do remember what my mother went through. She died sitting in the chair at the dialysis center 'resting' to go home.
Post Reply Post Reply
#6
RE: Dialysis affecting CPAP data
I'm sorry to hear about your mother, Gideon. That was probably Hemodialysis, where they take blood out and filter it then put it back in, in  a continuous process. Done three times a week, the variation in toxin levels is not as helpful as daily dialysis.

Here are two sample CA from randomly chosen days before dialysis:
          

And here are two/one from after:
      

I'm going to bounce this off the dialysis doctor, and see if she knows any sleep doctors.
Apnea Board Monitors are members who help oversee the smooth functioning of the Board. They are also members of the Advisory Committee which helps 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.
Post Reply Post Reply
#7
RE: Dialysis affecting CPAP data
IMHO the one after matches the second, 4 Sep, and appears to be CO2-driven breathing.
the first looks more like an arousal ending in CO2 breathing preceding the apnea.

With this sample I don't see enough difference to chase it down.
Post Reply Post Reply






Donate to Apnea Board  
#8
RE: Dialysis affecting CPAP data
Dialysis or because you changed your pressures? See how your min pressure increased from 9.6 cm min up to 11 cm min? That is probably more likely to be your issue then dialysis.

The first night with lowest AHI your pressure stayed the lowest averaging 9.8 cm, the next night AHI was middle of the pack and average pressure was 10.6 cm, worst night average pressure was 12 cm. This makes me think you get more central apneas as pressure is increased.

My recommendation would be to reduce pressure. I would start by reducing min pressure to 8 cm. Then post a few full nights of data so we can interpret the graphs. Limiting the pressure (using fixed pressure/CPAP mode) might be helpful if increasing pressures aren't helping and are causing centrals. Decreasing EPR to 2 cm might help as well but I would start with lower pressures first.
Post Reply Post Reply
#9
RE: Dialysis affecting CPAP data
I *think* the pressure change is a red herring. If we look at more of the Statistics page, we can see that the increase in CA preceded the increased pressure, and coincided with the introduction of dialysis and particularly the change from dextrose solution overnight to icodextrin solution overnight. I started dialysis on 6 November and switched to icodextrin on 6 December.

   

The change to 11.0 cmH2O was quite recent, the CA index jumped in December. I have noticed the increase in average and max pressure, which was unexpected, and I am considering backing off to 10.0 or 10.2. I haven't used a minimum of 8.0 for many years, and my CA index has been in the small tenths with a min of 9.6. Most of my AHI has been in Hypopneas, so decreasing EPR is not an option.
Apnea Board Monitors are members who help oversee the smooth functioning of the Board. They are also members of the Advisory Committee which helps 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.
Post Reply Post Reply
#10
RE: Dialysis affecting CPAP data
(04-27-2021, 10:55 AM)pholynyk Wrote: Most of my AHI has been in Hypopneas, so decreasing EPR is not an option.

Based on your cyclic breathing nature I wouldn't be surprised if a number of those hypopneas are central in nature. You should be able to tell by looking at detailed flow rates. If occurring during ebb of a cyclical pattern then is central in nature, if occurring out of the blue during normal breathing obstructive. My grandfather gets something similar and the machine even wrongly labels a number of his central apneas as obstructive apneas which then blows up his pressure making it all worse... Decreasing and limiting pressure helped him significantly.

On that topic I see you have tried lower pressures but something was still driving pressure up and your average pressure has been increasing nearly continuously since starting dialysis. If I look back at last June you had your next highest average pressure and highest AHI pre dialysis. Its not much of a trend (in reality your numbers aren't fluctuating that bad) but there does seem like there may be a trend of increased AHI with increased pressure. The obvious chicken or egg argument is what came first the increased pressure or the increased hypopneas/centrals? If it were me I would try a fixed pressure of 8 cm (with 3 epr) and see what your data does as that would give an indication of what is causing what.
Post Reply Post Reply






Donate to Apnea Board  


Possibly Related Threads...
Thread Author Replies Views Last Post
  [Diagnosis] On cpap for 3 years with low AHI..but still waking at least 8+ times (Oscar Data) Metalsymphony 11 309 06-17-2021, 08:38 PM
Last Post: SarcasticDave94
  First Post - 60 days using CPAP - AHI still 10+ Oscar Data included fikus56 19 653 06-04-2021, 09:51 AM
Last Post: fikus56
Question [CPAP] CPAP sd card data logging principle xxxxqwe 9 221 05-24-2021, 12:12 AM
Last Post: SideSleeper
  Initial Data from CPAP usage MiddleAgeGeek 2 197 04-08-2021, 08:27 PM
Last Post: Sleeprider
  New to CPAP lost with the data. Any help appreciated LBTRS 20 754 04-05-2021, 08:13 PM
Last Post: SarcasticDave94
  affects of fluid in eustation tubes and ears affecting AHI silversnore 4 191 03-19-2021, 08:50 PM
Last Post: hegel
  Please help: Day 9 with CPAP and AHI still over 7 (Oscar data included) ashwa 20 755 03-14-2021, 12:54 PM
Last Post: sheepless


New Posts   Today's Posts






About Apnea Board

Apnea Board is an educational web site designed to empower Sleep Apnea patients.