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AHI Increasing, Obstr and Clear Airway Index up
#1
AHI Increasing, Obstr and Clear Airway Index up
]I attached my sleepyhead image....  At one point about 2 months ago, with no changes, my AHI went from 2 to 4 and my Obstructive Index went from .91 to 2 and Clear Airway from .8 to 2 and my Hypopnea Index went down. from .78 to .3.   While not bad per se, I am interested to get thoughts on why this would occur.

Thanks!
Thanks   


       
Details Most Recent Last Week Last 30 Days Last 6 Months Last Year
CPAP Usage
Average Hours per Night 06:50 06:45 07:02 06:39 06:37
Compliance 100% 100% 100% 99% 99%
Therapy Efficacy
Last 30 Days Last 6 Months Last Year
AHI 3.66 4.06 4.01 2.56 2.53
Obstructive Index 1.90 2.14 1.95 1.05 0.91
Hypopnea Index 0.29 0.68 0.82 0.73 0.78
Clear Airway Index 1.46 1.25 1.24 0.78 0.85
Flow Limitation Index 0.58 0.25 0.40 0.28 0.29
RERA Index 0.29 0.04 0.08 0.14 0.15
Leak Statistics
Average Leak Rate 0.00 0.01 0.09 0.19 0.27
90% Leak Rate 0.00 0.00 0.00 0.00 0.00
% of time above Leak Rate threshold 0.00% 0.00% 0.00% 0.01% 0.02%
Pressure Statistics
Average Pressure 10.25 10.36 10.49 10.30 10.28
Min Pressure 10.00 10.00 10.00 8.00 8.00
Max Pressure 12.10 13.50 15.00 15.50 15.50
90% Pressure 11.40 11.50 11.90 11.50 11.30
Average EPAP 8.55 8.64 8.77 8.61 8.65
Min EPAP 8.10 8.00 7.80 7.60 6.90
Max EPAP 10.40 11.20 13.00 13.50 13.50

[attachment=5391]
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#2
RE: AHI Increasing, Obstr and Clear Airway Index up
It would be best to pick a typical day from 3 months ago if you still have the data and post the daily view. See the link below on how to optimize the layout first. Also post a current daily screen shot to show where you are now. Then we could comment better.
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#3
RE: AHI Increasing, Obstr and Clear Airway Index up
Possible reasons are a change in equipment (ie mask type), gaining weight, or changing sleep positions. Also your throat can just become looser with age.
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#4
RE: AHI Increasing, Obstr and Clear Airway Index up
It seems you were using a lower minimum of 8 and a higher maximum of 10.5 30 days ago why did you change ? from that point forward both OSA & CA's went up ?
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#5
RE: AHI Increasing, Obstr and Clear Airway Index up
Thanks for the reply.  i have been on apap, no changes during the increase in ahi, starting pressure is 10.   At one point it may have been starting point of 8.
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#6
RE: AHI Increasing, Obstr and Clear Airway Index up
Thanks for the reply....  No real change in weight or position...mask is the same respironics wisp.  Thanks again.
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#7
RE: AHI Increasing, Obstr and Clear Airway Index up
[attachment=5396][attachment=5397]
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#8
RE: AHI Increasing, Obstr and Clear Airway Index up
Not sure why the change. Perhaps just one of those things that goes bump in the middle of a CPAP night. If you want to get AHI back down I think you need to increase your minimum pressure by about 2 cm or turn the FLEX off. 

Have you turned off the Clear Airway event flags in SleepyHead? They don't see to be showing, or perhaps I am going blind...
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#9
RE: AHI Increasing, Obstr and Clear Airway Index up
Thank you for the advice.    The lower AHI day, there was one Clear Airway event.    The 4.89 night had 14 events, attached.  

   
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