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Intermittent spikes in AHI/AI overtime
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ckingzzzs Offline

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Posts: 57
Joined: Aug 2015

Machine: resmed aircurve 10 VAUTO
Mask Type: Nasal pillows
Mask Make & Model: swift fx nasal pillows
Humidifier: resmed aircurve10 vauto
CPAP Pressure: min epap 7, max ipap 20, PS 4
CPAP Software: ResScan SleepyHead

Other Comments: CPAP user June-Dec 2015, VPAP starting Jan 2016 and struggling with proper adjustments

Sex: Male
Location: maine

Post: #1
Intermittent spikes in AHI/AI overtime
I have been using the arisense 10, autopressure, FX nasal pillows. I reviewed the last 30 day numbers which show:

AI=5
AHI=7
Hypo=2.0
central =4.4

machinen set on auto 4-20
median pressure=8
95th percentile=11.2
max=13

leakage pressures
median=0
95th percentile=10.8
max=24

I noticed in the past 30 days that on THREE nights my AHI and AI have gone through the roof. AHI=22, and AI=20. Why do I get a high AHI and AI on intermittent occassions when in fact nothing has changed in my system or the way I use the apparatus.
09-22-2015 06:38 PM
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eseedhouse Offline

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Posts: 879
Joined: Dec 2014

Machine: ResMed Airsense 10 Autoset
Mask Type: Full face mask
Mask Make & Model: SimPlus
Humidifier: ResMed
CPAP Pressure: 7-10
CPAP Software: SleepyHead

Other Comments: Also on supplemental O2 at 3L/min. while sleeping.

Sex: Male
Location: Victoria, British Columbia

Post: #2
RE: Intermittent spikes in AHI/AI overtime
(09-22-2015 06:38 PM)ckingzzzs Wrote:  I have been using the arisense 10, autopressure, FX nasal pillows. I reviewed the last 30 day numbers which show:

AI=5
AHI=7
Hypo=2.0
central =4.4

machinen set on auto 4-20
median pressure=8
95th percentile=11.2
max=13

leakage pressures
median=0
95th percentile=10.8
max=24

I noticed in the past 30 days that on THREE nights my AHI and AI have gone through the roof. AHI=22, and AI=20. Why do I get a high AHI and AI on intermittent occassions when in fact nothing has changed in my system or the way I use the apparatus.

Well, something changes in you. We are not machines, we are messy squishy organisms who change from day to day. Mine vary too, but in general are a lot lower than yours and rarely do I go over two. On the other hand I also need supplemental oxygen when sleeping.

Generally you need to get your AHI down a bit. 5 is considered the "standard" for proper treatment. Many are well under that on APAP treatment.

Ed Seedhouse
VA7SDH

I am neither a Doctor, nor any other kind of medical professional.

Actually you know, it is what it isn't.
09-22-2015 07:38 PM
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zonk Offline

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Posts: 7,908
Joined: Feb 2012

Machine: A10 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Activa LT
Humidifier: Integrated /ClimateLineAir
CPAP Pressure: 9/13
CPAP Software: ResScan

Other Comments: CPAP since Nov 2010

Sex: Male
Location: Australia

Post: #3
RE: Intermittent spikes in AHI/AI overtime
Hi ckingzzzs
Last 30 days, AHI 7, central 4.4 .... the majority of events are centrals
Past 30 days (3 nights) AI 20 ... What is the breakdown of events (obstructive and central)
The Autoset do nothing to central apnea , other than scoring it
This is something need to be monitored and talk to the treating sleep doctor about

Leak numbers are good and within acceptable range
Pressure wise, there is room to increase the minimum pressure close to the median pressure
Perhaps decrease the maximum set pressure from 20 to 13 or 14, this is not going make much difference as the machine did not climb above 13
09-22-2015 07:42 PM
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foss Offline
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Posts: 203
Joined: Jun 2015

Machine: ResMed Autosense 10
Mask Type: Full face mask
Mask Make & Model: Respironics Amara View FFM
Humidifier: Resmed
CPAP Pressure: 9 - 13.4
CPAP Software: ResScan SleepyHead

Other Comments: Marine Chemist, Science Teacher & Counselor, Internet Server Admistrator

Sex: Male
Location: Under The Rainbow

Post: #4
RE: Intermittent spikes in AHI/AI overtime
Hi ckingzzzs

I suppose my numbers could be better. My average over a given 30 days is usually around an AHI of 4 with the centrals at around 1 or a little less. I have had a few days that my average AHI was as high as 12 but they are rare. My doctor is happy with my results. My AHI during a sleep study several months ago was 83 events per hour. I guess less than five almost every night is good relative to that. Like the others have mentioned, a discussion with your doctor would be a good idea.

Do you know what your untreated events were like?

Jeff

Sleep is worth the effort.
(This post was last modified: 09-22-2015 07:59 PM by foss.)
09-22-2015 07:58 PM
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