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What time period does a trend make? Leak and AHI
If I'm looking at my ResScan Data, what is the best time period to judge a trend in therapy? I have seen a big difference when I look at data for different time periods. I have only been using ResScan for about six months and some data mainly from feb is skewed due to having to take 19 days off or be without a nose from impending necrosis.But I digress, if I'm looking for a trend towards improvement what time period whould I use?
Also, I am using a new mask, the Fit Life total face mask and fighting large leaks 1.2L/s to 2.0L/s.
Does the machine compensate for these high leaks, and is my AHI, AI data reliable?
Thanks,
Mary Z.
Views: 38
Replies to This Discussion
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Permalink Reply by Judy on
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If you are trying to judge a pressure change or a mask change or whatever, you want at least one week of data - unless the change has made things so bad or miserable that it doesn't make any sense at all to stick with it. That one week should show some improvement if it was a change for the better. Whether that change and improvement was good enough may well take 2 weeks to a month. But a week should tell you if you are on the right track.
The Resmed's don't like to see a leak higher than 24 L/M (0.4 L/s) but supposedly can compensate up to 40 L/M leaks. Beyond a 95th percentile 40 L/M leak confidence in the rest of the data is reduced.
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Permalink Reply by RockRpsgt on
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The Resmed's don't like to see a leak higher than 24 L/M (0.4 L/s) but supposedly can compensate up to 40 L/M leaks. Beyond a 95th percentile 40 L/M leak confidence in the rest of the data is reduced.
Doesn't the type of mask have alot to do with this?
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that makes sense. thanks jnk.
j n k said:ResMed machines subtract intentional vent from reported leak.
Rock Hinkle said:The Resmed's don't like to see a leak higher than 24 L/M (0.4 L/s) but supposedly can compensate up to 40 L/M leaks. Beyond a 95th percentile 40 L/M leak confidence in the rest of the data is reduced.
Doesn't the type of mask have alot to do with this?
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Permalink Reply by Mary Z on
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I'm sure the type of mask has something to do with the leak rate. I'm trying to get used to a FitLife Total Face Mask, working with the headgear and macks silicone, trying to systematically find what works best. So far I'm not doing too well. I think some modifications to the headgear and finding the right area to place the silicone will help. One thing about this mask is that it is new and there are no machine settings.
Here are the intentional leak specifications: I could not enlarge the picture, the mask I have is the bottom one. The numbers on the left side are 0.0, 20, 40, 60, 80, 100, 120- the exhaust leak rate (SLPM. Across the bottom they read 0, 5, 10, 15, 20 , 25, 30, 35, 40, 45- Pressure cm H20. Pressure Drop cm H20 (hPa) is .52 50 SLPM and1.07 100 SLPM (means nothing to me) and deadspace volumn is 550 ml.
Thanks for the info j n k
Thanks, Mary Z.
Rock Hinkle said:The Resmed's don't like to see a leak higher than 24 L/M (0.4 L/s) but supposedly can compensate up to 40 L/M leaks. Beyond a 95th percentile 40 L/M leak confidence in the rest of the data is reduced.
Doesn't the type of mask have alot to do with this? - Attachments:
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FitLife 001.jpg, 143 KB
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These charts are never easy to read - but - it looks to me like:
5 cms = 30 L/M
10 cms = 45 L/M
15 cms = 60 L/M
20 cms = 70 L/M
25 csm = 80 L/M
for the first version listed and
5 cms = 15 L/M
10 cms = 20 L/M
15 cms = 25 L/M
20 cms = 30 L/M
25 cms = 38 L/M
for the second version listed
Check your Resmed VPAP Auto 25 Users Manual for the Resmed masks w/the allowed vent rate closest to the above and use that Mask Selection.
MAYBE somewhere Respironics lists their mask allowed vent rates as Resmed does in the Resmed PAP Users Manuals now.
Another alternative is to contact Respironics and ask them what the allowed vent rate is for the version of the FitLife you are using at the pressure setting(s) you are using.
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Judy, thanks for the info. The doc's tech told me to put it on "Standard Mask" I will still look it up. He is familiar with the FitLife and gave me a tip that has really worked out. There are three straps, one across the top of the head and two connected in the middle straps across the back of the head - a high one and a low one. The high one was sliding down pulling the mask with it. He said to tie a bandana around my head where the middle strap should be, fasten the strap over that and it shouldn't slide down. I have found it easier to tie those top two straps together, keeping the one to the back of my head in place.
I worked with that last night and the mack's silicone lovingly applied around the perimeter and had zero leak. This makes me believe the last time a few days ago when the leak was zero it was accurate data. I'm pretty excited. If this continues to work it will be great.
Thanks for everyones help. If I get the leak under control, and now I believe I can, the other data should be accurate.
Mary Z.
Judy said:
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