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[Equipment] S9 Autoset - AHI recording correctly?
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Dial999 Offline

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Posts: 3
Joined: May 2012

Machine: S9 autoset Resmed
Mask Type: Full face mask
Mask Make & Model:
Humidifier: H5i
CPAP Pressure: 6-16
CPAP Software: ResScan

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Sex: Undisclosed
Location:

Post: #1
S9 Autoset - AHI recording correctly?
[attachment=196]Hi guys,
Firstly, thanks for all the help received already, just by reading the forum.

Using Resmed to look at the graphs, I notice that the blue line for AHI seemed to only record for a short time. Other nights have been the same, the blue line just runs for a few hours, unlike all the other graphs which cover the whole time. The only events listed are within the blue line period, nothing when it is not there. Is the machine faulty?
It is a hire machine, and I've already wasted time with the wrong sized mask, then the heated hose error. Am buying a machine soon.
06-02-2012 06:31 AM
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Dawei Offline

Preferred Members-2

Posts: 342
Joined: Feb 2012

Machine: ResMed S9 AutoSet
Mask Type: Other
Mask Make & Model: Respironics "FitLife"
Humidifier: H5i
CPAP Pressure: 10-20
CPAP Software: ResScan SleepyHead

Other Comments: Began CPAP in 2006; spent the first 6 years with a "brick"

Sex: Male
Location: Western North Carolina

Post: #2
RE: S9 Autoset - AHI recording correctly?
Welcome to the board. I'm sure others who have a higher level of expertise will respond, but as you suggested, I think that machine is faulty, since the trace for AHI should be present for the entire sleep period whether it's a flat line at 0 AHI or going up and down during the night. The fact that the pattern of short AHI recording happens again and again would seem to eliminate a one-time glitch.
06-02-2012 07:32 AM
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Dial999 Offline

New Members

Posts: 3
Joined: May 2012

Machine: S9 autoset Resmed
Mask Type: Full face mask
Mask Make & Model:
Humidifier: H5i
CPAP Pressure: 6-16
CPAP Software: ResScan

Other Comments:

Sex: Undisclosed
Location:

Post: #3
RE: S9 Autoset - AHI recording correctly?
Thanks for that reply.
Looking back over the results from the old machine, and results using a new machine I've just purchased, I notice that the AHI line only starts when the first event happens.

I assumed that was because it can't show events if it is not registering them, but now I think the AHI line is just a calculation which only starts calculating after the first event happens.
This does not explain why, in the image I attached, it stopped calculating. Anyone throw any light on this?
06-02-2012 06:50 PM
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Sleepster Offline
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Posts: 4,988
Joined: Feb 2012

Machine: ResMed AirCurve10 VAuto
Mask Type: Full face mask
Mask Make & Model: F&P Simplus
Humidifier: HumidAir and SlimLine Hose
CPAP Pressure: MaxI 13.6 | MinE 5.2 | PS 4.4
CPAP Software: ResScan SleepyHead

Other Comments: Diagnosed Nov 2011. Conquered aerophagia.

Sex: Male
Location: Houston, Texas

Post: #4
RE: S9 Autoset - AHI recording correctly?
I'm not familiar with Rescan as I have a PRS1 machine and use SleepyHead. But ... it looks to me like it's a graph of the AHI per hour. As such, when you go a full hour with no events, the AHI per hour drops to zero for that hour. If I'm correct then your graph is correct.

You could try looking at your data in SleepyHead. It also plots a graph of the AHI per hour.

Sleepster
Apnea Board Moderator
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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.
06-02-2012 08:59 PM
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zonk Offline

Advisory Members

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: #5
RE: S9 Autoset - AHI recording correctly?
Ditto what Sleepster said. the AHI count is incremented at the occurrence of every event and reset every hour.
06-02-2012 09:16 PM
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archangle Offline
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Advisory Members

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: #6
RE: S9 Autoset - AHI recording correctly?
The data is there, it's just that it's zero much of the time.

Almost everywhere else but SleepyHead, AHI is only calculated as a daily number, not a per-hour number like SleepyHead does, so beware about comparing that AHI graph number with numbers from elsewhere.

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.
06-02-2012 10:28 PM
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