Hello Guest, Welcome to Apnea Board !
As a guest, you are limited to certain areas of the board and there are some features you can't use.
To post a message, you must create a free account using a valid email address.

or Create an Account


New Posts   Today's Posts

Resmed autoset s9 vs. s8 events?
#1
I've recently started using an s9; had been using an s8.
My AI displays approx .2 on either. However, on the s9 AHI is always reported as the same as AI (e.g., no hyp's); the s8 typically reported AHI in the vicinity of 1.2. Different event criteria, hire effective, or??
Post Reply Post Reply
#2
Same here. Five years on an S8 and AHI averaged 4.0. Switched to an S9 and AHI is now averaging 0.3, most consisting of centrals. Better treatment or different way of measuring events, who knows?
Post Reply Post Reply
#3
It is my understanding that the software innards of the machines changed a lot from the S8s to the S9s and are better able to determine what is what and when. Meaning the S9 would be more accurate.
PaulaO2
Apnea Board Moderator
www.ApneaBoard.com


Breathe deeply and count to zen.

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.




Post Reply Post Reply


#4
(11-09-2013, 01:21 PM)hobbs Wrote: Better treatment or different way of measuring events, who knows?
Maybe bit of both. Two different algorithm, S8 autoset does not increase pressure above 10 cm H2O when an apnea detected nor respond to hypopnea to avoid falsely responding to central hypopnea

Post Reply Post Reply
#5
(11-09-2013, 07:41 PM)zonk Wrote:
(11-09-2013, 01:21 PM)hobbs Wrote: Better treatment or different way of measuring events, who knows?
Maybe bit of both. Two different algorithm, S8 autoset does not increase pressure above 10 cm H2O when an apnea detected nor respond to hypopnea to avoid falsely responding to central hypopnea

I agree. These machines continue to get smarter with each generation.
[Image: daD6uvCm.jpg]
"Since this country was founded, each generation of Americans has been summoned to give testimony to its national loyalty. The graves of young Americans who answered the call to service surround the globe." JFK Jan 20, 1961
Post Reply Post Reply
#6
I think the difference in readings is in the borderline apnea events. Every machine probably properly records the events where you completely stop breathing for long periods of time. The uncertainty is when you don't stop breathing completely. There's some uncertainty in determining what percent your breathing slows down and how long before you draw the line and say the apnea is over.

The important point is that the difference in AHI numbers may not really mean that much, because it's not the "strong" and long apneas that are being measured differently.
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.
Post Reply Post Reply




Possibly Related Threads...
Thread Author Replies Views Last Post
  Clusters of mixed events - what is causing them? TexasTiger 11 254 05-14-2017, 02:13 AM
Last Post: TexasTiger
Question Possible for resmed airsense 10 autoset/Sleepyhead to report false 0.0 AHI? pcplus2 4 286 04-27-2017, 05:47 PM
Last Post: dwd1249
  Why do events occur with APAP machines BHappy 19 924 04-20-2017, 07:06 PM
Last Post: quiescence at last
  [Equipment] ResMed Autoset II w/EPR and humidifier -ERROR thisazlife 2 254 04-12-2017, 03:29 PM
Last Post: thisazlife
  ResMed Airsense 10 Autoset thisazlife 6 500 04-12-2017, 11:43 AM
Last Post: sonicboom
  Hypopnea events while awake ppca 6 407 04-07-2017, 05:42 PM
Last Post: ppca
  [Equipment] ResMed AirSense 10 AutoSet APAP vs ResMed AirSense 10 AutoSet For Her SingerWang 11 682 04-04-2017, 12:07 AM
Last Post: JamesW

Forum Jump:

New Posts   Today's Posts




About Apnea Board

Apnea Board is an educational web site designed to empower Sleep Apnea patients.

For any more information, please use our contact form.