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what does a negative AHI mean?
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zimlich Offline

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Posts: 392
Joined: Feb 2012

Machine: Respironics PR System One BiPap Auto SV Advanced
Mask Type: Nasal mask
Mask Make & Model: ResMed gel Nasal Mask
Humidifier: System One
CPAP Pressure: 8-20 ASV, 8 EPAP,PS 12
CPAP Software: Not using software

Other Comments: I use the Quattro FFM when necessary

Sex: Female
Location: Norfolk, VA

Post: #11
RE: what does a negative AHI mean?
jamica5555, I used to preach that all you had to do was wear your mask and use the machine 100% of sleep time and all would be well. After a while you would feel good. Then I learned that if you're not getting into REM and the deep stage of sleep you aren't getting the restorative sleep that heals your body. Your batteries don't charge anymore.
If you're not feeling good with that AHI, first I would look at how good my sleep is- if you're not waking up rested in the morning chances are you're not getting the healing sleep you need. If you're sleeping well and still feel fatigued it's time to look for other causes. If you have not had a thorough physical with blood work in the past year I would make an appointment with your GP and get checked out. Your B12, Vit D (hormone D), thyroid hormone, H&H, and many other defiencies can lead to fatigue. There is chronic fatigue syndrome- it causes you to feel terrible. If your sleep is poor, review sleep hygiene and work on improving the quality of your sleep. I know it seems simplistic, but there are many small things that can ruin your sleep. Anything that partially arouses you over and over during the night such as chronic pain will disrupt your sleep. Some folks are exquisitely sensitive to caffiene and can't drink caffeine past a certain time of day. Many medications alter sleep architecture and you don't get into REM or deep sleep. A pet or child in the bed, a bad sleep partner, many things can keep you in the lighter stages of sleep. It would be natural to be depressed over feeling so bad, and that is a bad cycle- the sleep gets worse and worse.

Good luck. Please keep us posted on how you're doing. We would like to get through this period with you.
Mary
02-15-2013 08:37 AM
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archangle Offline
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Posts: 3,159
Joined: Feb 2012

Machine: ResMed S9 AutoSet
Mask Type: Nasal pillows
Mask Make & Model: ResMed Swift FX
Humidifier: ResMed S9 H5i
CPAP Pressure: 16-20
CPAP Software: ResScan SleepyHead EncoreBasic

Other Comments: Happy PAPper

Sex: Undisclosed
Location: USA

Post: #12
RE: what does a negative AHI mean?
Welcome, Jamica.

Some people say that S9 machines will sometimes get "stuck on zero" and show zero AHI when they shouldn't. The solution is to unplug the power from the back of the machine or unplug from the wall for a minute or so. It's probably not your problem, but try it just in case and see if the numbers stay the same for the next few days.

AHI=0 is entirely possible. You can still have some nighttime breathing problems.

Please correct your profile. There is no "S9 Auto." It should say "S9 AutoSet" or "S9 Escape Auto" next to the power button.

Get the free SleepyHead software here.
Useful links.
Click here for information on the main alternative to CPAP.
If it's midnight and a DME tells you it's dark outside, go and check it yourself.
02-15-2013 12:50 PM
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jamica5555 Offline

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Joined: Feb 2013

Machine: Resmed S9 Escape Auto
Mask Type: Nasal pillows
Mask Make & Model: cpap pro mask
Humidifier: unsure
CPAP Pressure: 12-20
CPAP Software: ResScan SleepyHead

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Sex: Female
Location: kansas

Post: #13
RE: what does a negative AHI mean?
Okay paul02 thanks for the help. I followed the steps in both programs and for some reason the leaks graph is just not in resscan .... when i try to open the detailed graphs it says no data available and when I look at the summary graphs tab it shows from the top down a graph for usage, total usage, AHI, and pressure. It doesnt have anyway to scroll down it will only scroll over and acts like there is no other graph.... ? I also went in sleepyhead and made the preference changes and it shows leaks min max and 95% all as -1.20 which I guess I am to assume is 1.20. These all seem the same for every day and as an average.

Zonk- Ya I dont understand I kept going to what was suppose to be the best sleep doctor around and he ended up just trying to put me on uppers and downers like ritalin and crap it was horrible... and then he basically just told me to deal with it that I was fine. I also have low thyroid, and High blood pressure which started after sleep apnea. I have been tested for everything and seen alot of doctors to make sure there was nothing else contributing to the extreme fatigue and host of other symptoms which I think really all come back to my body not repairing itself right because I am not able to sleep. I have also recently gone down to the bare minimum with medications which seems to have helped some.
02-15-2013 05:22 PM
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zonk Offline

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Posts: 7,908
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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: #14
RE: what does a negative AHI mean?
(02-15-2013 05:22 PM)jamica5555 Wrote:  when i try to open the detailed graphs it says no data available and when I look at the summary graphs tab it shows from the top down a graph for usage, total usage, AHI, and pressure.
for detailed data, the card have to be in the machine while using the machine and you need to select all available data (as shown)
the SD card store most recent 30 days of detailed data, 7 days high resolution and 365 days of therapy data (older data cannot be retrieved)

A Note on installing ResScan (post #2 ResScan thread)
After you install the ResScan software, you'll need to select "ALL DATA" when downloading the data from the SD card, otherwise you can't download all your historical data.

When you start the software, on the download page is a box where you can select to download Summary Data, Detailed Data, or All Data. See the screenshot (below) of that selection box. There is also a box on that same page you can check to SAVE your selection for all downloads
[Image: attachment.php?aid=60]

Edit: ResScan Report Interpretation Guide (might be of some help
http://www.apneaboard.com/ResScan_Interpretation-Guide.pdf
(This post was last modified: 02-15-2013 05:54 PM by zonk.)
02-15-2013 05:39 PM
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Ugly Offline

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Posts: 568
Joined: Oct 2012

Machine: ResMed S9 AutoSet
Mask Type: Nasal mask
Mask Make & Model: ResMed Mirage Micro
Humidifier: ResMed H5i
CPAP Pressure: 7-14
CPAP Software: ResScan SleepyHead

Other Comments: Hydrocephalus, myopia, depression, chronic ugliness, stupidity, tinnitus, mixed sleep apnea.

Sex: Male
Location: Barrie Ontario Canada

Post: #15
RE: what does a negative AHI mean?
(02-15-2013 12:50 PM)archangle Wrote:  Welcome, Jamica.

Some people say that S9 machines will sometimes get "stuck on zero" and show zero AHI when they shouldn't. The solution is to unplug the power from the back of the machine or unplug from the wall for a minute or so. It's probably not your problem, but try it just in case and see if the numbers stay the same for the next few days.

AHI=0 is entirely possible. You can still have some nighttime breathing problems.

Please correct your profile. There is no "S9 Auto." It should say "S9 AutoSet" or "S9 Escape Auto" next to the power button.

All the AHI readings I get are zero or negative numbers.
Mind you, I'm using an S9 Escape which doesn't really calculate AHI.
So I don't know where SleepyHead is getting these readings from.
02-15-2013 11:27 PM
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jamica5555 Offline

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Posts: 22
Joined: Feb 2013

Machine: Resmed S9 Escape Auto
Mask Type: Nasal pillows
Mask Make & Model: cpap pro mask
Humidifier: unsure
CPAP Pressure: 12-20
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Female
Location: kansas

Post: #16
RE: what does a negative AHI mean?
zimlich I have had so many tests ran and have had everything checked you have mentioned for sure and very thorough physicals for years and then they found the sleep apnea and it was like the answer except the therapy never worked. The only thing I am not sure of if the h&h that you mentioned. I think my gp grasping at straws did finally diagnose chronic fatigue but I really felt like he did that to just have something to tell me after all the tests and specialist. I have always felt like my sleep wasnt right exactly like I dont get into deep sleep. I was however told by the sleep study people that I will go all night without deep sleep and also no have any apnea events but then if I should happen to go into deep sleep the events were very frequent and severe. It actually caused them to almost miss the dx after 2 sleep studies because I was never going into deep sleep. How do you fix that....ya know.

archangle I will check that just in case thanks. I do have the s9 escape.

Is that not a good machine?

Thanks so much to all for the help.
02-16-2013 03:35 AM
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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: #17
RE: what does a negative AHI mean?
S9 Escape Auto is not full data capable machine
no efficacy data and no detailed data on the card
just hours usage and AHI
no leak or central apnea detection

S9 AutoSet and S9 Elite are full data capable machines
02-16-2013 03:58 AM
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jamica5555 Offline

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Posts: 22
Joined: Feb 2013

Machine: Resmed S9 Escape Auto
Mask Type: Nasal pillows
Mask Make & Model: cpap pro mask
Humidifier: unsure
CPAP Pressure: 12-20
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Female
Location: kansas

Post: #18
RE: what does a negative AHI mean?
zonk I tried to redownload data with the detailed data and it still does not show any of that information....

does anyone have my cpap machine and get detailed data in resscan>?
okay so its my machine that doesnt do that type of data.... hmmm I love how my machine works its easy to breath is there a better version of it that could help me out more?
(This post was last modified: 02-16-2013 04:29 AM by jamica5555.)
02-16-2013 04:27 AM
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Shastzi Offline

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Posts: 1,174
Joined: Dec 2012

Machine: ResMed S9 Autoset
Mask Type: Full face mask
Mask Make & Model: FitLife Total face mask
Humidifier: F&P HC150 with Hybernite heated hose.
CPAP Pressure: 15cm-20cm H2O (auto)
CPAP Software: SleepyHead Other Software

Other Comments: CMS50-F wearable Oximeter; Software: SPO2 Assistant

Sex: Undisclosed
Location: Florida, USA.

Post: #19
RE: what does a negative AHI mean?
Jamica, see if you can get upgraded to an S9 autoset.
It's about $50 more but should be well worth it when it comes to your nap time. Wink
Then you'll be able to get all that flow/pressure data so you'll be able to see better what's happening and
folks here can help show you how to interpret it.

Best of Luck!

"With ordinary talent and extraordinary perseverance, all things are attainable." - Thomas Foxwell Buxton

Cool
02-16-2013 10:07 AM
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jgjones1972 Offline

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Posts: 516
Joined: Nov 2012

Machine: ResMed S9 AutoSet
Mask Type: Full face mask
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Humidifier: ResMed H5i
CPAP Pressure: 18 - 20
CPAP Software: ResScan SleepyHead

Other Comments: CMS50I PulseOx

Sex: Male
Location: Ohio - USA

Post: #20
RE: what does a negative AHI mean?
jamica5555,

What Shastzi said.

The AutoSet looks almost exactly like the Escape Auto (only difference in appearance is "AutoSet" above power button), but is a better machine because it supplies quality of sleep data necessary for monitoring and adjusting for optimum therapy. They both feel the same as far as therapy pressure, etc. DMEs like to push the Escape Auto onto unsuspecting customers because they get a bigger profit margin on them. If you want the better machine, do not take no for an answer. Some DMEs will give you all kinds of hassle and sometimes simply refuse to upgrade, but you can always go elsewhere. Don't let them cheat you!
02-16-2013 03:38 PM
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