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Resmed autoset s9 vs. s8 events?
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Hiker Offline

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Joined: Nov 2013

Machine: Resmed autoset s9
Mask Type: Nasal mask
Mask Make & Model: Respironics profile lite
Humidifier: H5
CPAP Pressure: 4-12
CPAP Software: Not using software

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Sex: Male
Location: Upstate NY

Post: #1
Resmed autoset s9 vs. s8 events?
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??
11-09-2013 10:49 AM
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hobbs Offline

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Joined: Sep 2013

Machine: S8 AutoSet II
Mask Type: Nasal mask
Mask Make & Model: Activa LT
Humidifier: F&P 150
CPAP Pressure: 10.8-12.0
CPAP Software: ResScan

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Sex: Male
Location: SoCal

Post: #2
RE: Resmed autoset s9 vs. s8 events?
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?
11-09-2013 01:21 PM
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PaulaO2 Offline
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Machine: S9 Autoset
Mask Type: Full face mask
Mask Make & Model: F&P Simplus
Humidifier: H5i
CPAP Pressure: 14-20
CPAP Software: SleepyHead

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Location: western NC, USA

Post: #3
RE: Resmed autoset s9 vs. s8 events?
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
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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.
11-09-2013 06:35 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: #4
RE: Resmed autoset s9 vs. s8 events?
(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
11-09-2013 07:41 PM
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justMongo Offline

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Posts: 3,840
Joined: Sep 2013

Machine: ResMed VPAP Auto (S9)
Mask Type: Full face mask
Mask Make & Model: ResMed Mirage Quattro
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CPAP Pressure: 18 IPAPmax - 11 EPAPmin, PS=5
CPAP Software: Other Software

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Location: Калифорния

Post: #5
RE: Resmed autoset s9 vs. s8 events?
(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.

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.
11-10-2013 09:39 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

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Location: USA

Post: #6
RE: Resmed autoset s9 vs. s8 events?
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.

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11-11-2013 07:12 PM
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