Zero AHI?

[Rambutan]

The last two nights produced an AHI of zero. Normally my AHI ranges between 0.3 to 1.5. I can't believe this is right. I have downloaded the data in ResScan and the AHI does not even show in the detailed graph which increases my suspicion that this is incorrect. Has anybody seen this before?

[Julie]

Sure, it happens quite a lot, if not all the time or necessarily consistently. Two nights in a row should be a cause for celebrating, not worrying!

[LSAT]

There is not a whole lot of difference between 0 and .3 AHI....A .3 AHI means that you had about 2 apneas during the night...(.3 per hour). If you would have gone from 3 to 0 that would be more unusual. (20-24 apneas)

[OutaSync]

I don't have the same machine you have, but I often have zero AHI. If I have one apnea or hyponea during the night, my machine reports an AHI of 1

Congratulations!

[Janknitz]

I've only had 0 once or twice. I didn't necessarily feel any different because my AHI's are low to begin with, but it's nice to know it can be acheived.

[GumbyCT]

Certainly a zero is an accomplishment. It could mean your therapy is spot on but you should check to be sure large leaks are not causing the machine to not sense events.

If your leak rate is in range for your mask and pressure then rejoice.

[linagee]

I'm shocked that with a color screen, the S9 Autoset does not have some sort of happy face for AHI below 5. (There is a happy face for the leak rate if it's low.) Maybe ResMed needs to come out with a firmware update to add more happy faces.

[Laos Film Director]

I have the same machine as you. I got AHIs of 0 for about 5 days in a row. My usual AHI is between 1 and 2.8 and I didn't believe the 0 readings. I erased the data on the card and the readings returned to my usual range.

I'm guessing your 0 readings are incorrect if they started appearing suddenly without any changes on your part. I made a similar post to yours 3-4 months ago and got some good responses from the knowledgable folks on this board.

[jlk]

Zero is great, you are probably seeing things correct. When I have no events, the detailed graph is also not there, I just thought it had no reason to be there if there was nothing to report. good job! john

[Rambutan]

Thank you for your responses. May be I have achieved what I thought was impossible. I have cleared the data of my card and am looking forward to see what will happen tonight.

[ZQuest]

I have the same machine as you. I got AHIs of 0 for about 5 days in a row. My usual AHI is between 1 and 2.8 and I didn't believe the 0 readings. I erased the data on the card and the readings returned to my usual range.

I'm guessing your 0 readings are incorrect if they started appearing suddenly without any changes on your part. I made a similar post to yours 3-4 months ago and got some good responses from the knowledgable folks on this board.

Hello

I have encountered the similar issues lately 5 day's of 0.0 AHI"s now this has got me skeptical 5 nights of 0.0 Apneas sounds impossible even though just before this happen i did made some changes,I upped the start press from 7cm to 8cm,rigged a hose management system and upped my low set pressure from 8cm/11cm to 8.2cm/11cm i was titrated at 10cm on my sleep study.Now i do have to say that my AHI numbers have been very good from the start of my therapy with the highest AHI for one night being 1.3 and leaks of 21 l/m for one night only also,now these are my worse numbers since i started about 6 months ago my averaged AHI have been around 0.6,and now this happens 0.0 for 5 nights straight hmmm,when i check my stats on ResScan all the number's are there except AHI's,the flow chart shows some apneas but none above the 10 sec. mark.My concerns are that if i reformmat the card will i loose data that the sleep doc might want to see on my next visit in March of 2011. If i power down the machine instead of leaving it on standby what effect would this have on the data stored in the machine/or data card? Would i have to re-program all the #s on the machine? i really want to verified these AHI's and im still learning how to read all the charts on ResScan.Any suggestions on how to better verified these numbers?


Regards: Phil

[Geminidream]

Congrats on the zero AHI!

I have accomplished this many times. My AHI number is relatively low to begin with most of the time so its not unusual for this to happen. It is something to be happy about and it means that you have something that works and is doing what its supposed to. I have finally accomplished that as well, for the most part.

[jlk]

Zquest quote; I have encountered the similar issues lately 5 day's of 0.0 AHI"s now this has got me skeptical 5 nights of 0.0 Apneas sounds impossible even though just before this happen i did made some changes,I upped the start press from 7cm to 8cm,rigged a hose management system and upped my low set pressure from 8cm/11cm to 8.2cm/11cm i was titrated at 10cm on my sleep study....My concerns are that if i reformmat the card will i loose data that the sleep doc might want to see on my next visit in March of 2011. If i power down the machine instead of leaving it on standby what effect would this have on the data stored in the machine/or data card? Would i have to re-program all the #s on the machine? i really want to verified these AHI's and im still learning how to read all the charts on ResScan.Any suggestions on how to better verified these numbers?


Regards: Phil[/quote]
You made changes for the better and improved your therapy, great! Are you feeling rested? That is the beauty of having access to the necessary software to follow your progress. If you re-format your card, you will be erasing all data on it and the only info available will be from the re-formatted data forward. You can have 2 cards, one to sleep with and one with just the statistics, depends on how much info your dr. wants/needs to see. You can turn the machine off and even unplug it and you will not lose any data other than the 12:00 pm auto reset info that is just a snapshot of your previous nights data. Congrats all who achieve zeros, I sure like seeing mine. john

[jlk]

I'm shocked that with a color screen, the S9 Autoset does not have some sort of happy face for AHI below 5. (There is a happy face for the leak rate if it's low.) Maybe ResMed needs to come out with a firmware update to add more happy faces.

I think a gold star would be nice! I like seeing zero on my ahi. john

[Captain_Midnight]

Has anybody seen this before?

On average, I get zero ahi about once per week. (Life's good)

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