Post Reply 
APAP and SH disagree on AHI
Author Message
TyroneShoes Offline

Preferred Members-2

Posts: 505
Joined: Oct 2014

Machine: Resmed S9 Autoset
Mask Type: Nasal pillows
Mask Make & Model: AirFit P10
Humidifier: Resmed H5i
CPAP Pressure: 10-14
CPAP Software: SleepyHead

Other Comments:

Sex: Undisclosed
Location:

Post: #1
APAP and SH disagree on AHI
My routine is to wake up, press the button on my APAP to get a general reading, then a bit later pull everything into Sleepyhead. Been doing that a long time. Never have the numbers disagreed.

Today my APAP gave an AHI reading of 1.6, while SH says 2.35. I do not include the "test" events in the total. I did not cross the "12 PM" boundary.

What's up with that? Anyone experience anything like this?
01-08-2015 10:57 AM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
quiescence at last Offline

Advisory Members

Posts: 753
Joined: Nov 2014

Machine: REMstar System One with Autoflex
Mask Type: Full face mask
Mask Make & Model: Quattro AirFit F10
Humidifier: yes typical setting = 4
CPAP Pressure: 5-13 Autotritrating CPAP
CPAP Software: SleepyHead EncoreBasic

Other Comments: CMS-50F Plus oximeter /w SPO2 Assistant software. Avowed mouth-breather switching to nose-breathing

Sex: Male
Location: US

Post: #2
RE: APAP and SH disagree on AHI
I never cared much about the LCD screen readouts on my PRS1, but compare my SH scores with my EncoreBasic scores. They have been aligned each time I checked. My LCD screen has totally diff numbers, sometimes higher sometimes lower.

Dedicated to QALity sleep.
You'll note I am listed as an Advisory Member. I am honored to be listed as such. See the fine print - Advisory Members as a group provide advice and suggestions to Apnea Board administrators and staff concerning Apnea Board operation and administrative policies. Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment.
01-08-2015 12:19 PM
Find all posts by this user Post Reply Quote this message in a reply
justMongo Offline

Monitors

Posts: 3,840
Joined: Sep 2013

Machine: ResMed VPAP Auto (S9)
Mask Type: Full face mask
Mask Make & Model: ResMed Mirage Quattro
Humidifier: ResMed H5i
CPAP Pressure: 18 IPAPmax - 11 EPAPmin, PS=5
CPAP Software: Other Software

Other Comments: μολὼν λαβέ

Sex: Male
Location: Калифорния

Post: #3
RE: APAP and SH disagree on AHI
Try ResScan and compare with SH.
Has to be some other form of respiratory arousal that SH is counting in the total.

My LCD is always right on with reporting SW.

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.
01-08-2015 05:17 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
TyroneShoes Offline

Preferred Members-2

Posts: 505
Joined: Oct 2014

Machine: Resmed S9 Autoset
Mask Type: Nasal pillows
Mask Make & Model: AirFit P10
Humidifier: Resmed H5i
CPAP Pressure: 10-14
CPAP Software: SleepyHead

Other Comments:

Sex: Undisclosed
Location:

Post: #4
RE: APAP and SH disagree on AHI
(01-08-2015 05:17 PM)justMongo Wrote:  Try ResScan and compare with SH.
Has to be some other form of respiratory arousal that SH is counting in the total.

My LCD is always right on with reporting SW.

Well, if the Autoset and SH are counting different types of events, then it would have to have been a coincidence every night for 6 months in a row that the numbers still added up to the same total; astronomically impossible.

If SH is counting anything other than the common three types of events in AHI (and it is not counting the experimental events as that is turned off in the prefs), it sure is doing it opaquely.

But then some of this stuff may be obvious, yet still opaque to me. I am still not sure what triggers certain pressure changes in my APAP; the SH graphs don't seem to reveal anything that connects.
01-08-2015 08:56 PM
Find all posts by this user Post Reply Quote this message in a reply
TyroneShoes Offline

Preferred Members-2

Posts: 505
Joined: Oct 2014

Machine: Resmed S9 Autoset
Mask Type: Nasal pillows
Mask Make & Model: AirFit P10
Humidifier: Resmed H5i
CPAP Pressure: 10-14
CPAP Software: SleepyHead

Other Comments:

Sex: Undisclosed
Location:

Post: #5
RE: APAP and SH disagree on AHI
OK, it happened again. Again the Autoset gave the lower reading (1.8) while SH gave the higher reading (2.88). If I do the math, SH is correct according to the number of events it flagged, for AHI as well as for the three individual indexes.

The Autoset is also reporting that I slept (or ran the blower) for 24.0 hours. Nuh-uh, that didn't happen. And if it had, that would mean that its calculated AHI, if accurate to the flagged events over time, would be more like 0.7. So, wrong on both counts.

So something funny is going on here.
01-10-2015 12:46 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
vsheline Offline

Advisory Members

Posts: 1,907
Joined: Jul 2012

Machine: S9 VPAP Adapt (USA Model# 36007, not better 36037 or 36067)
Mask Type: Full face mask
Mask Make & Model: F10 or SimPlus w/ 2Liners. MirageQuatro & Gecko gel pad
Humidifier: H5i
CPAP Pressure: 15 EPAP, PS 5-10
CPAP Software: ResScan

Other Comments: Marfan Syndrome, chronic bradycardia, occasional Cheyne-Stokes Respiration

Sex: Male
Location: California, USA

Post: #6
RE: APAP and SH disagree on AHI
(01-10-2015 12:46 PM)TyroneShoes Wrote:  OK, it happened again. Again the Autoset gave the lower reading (1.8) while SH gave the higher reading (2.88). If I do the math, SH is correct according to the number of events it flagged, for AHI as well as for the three individual indexes.

The Autoset is also reporting that I slept (or ran the blower) for 24.0 hours. Nuh-uh, that didn't happen. And if it had, that would mean that its calculated AHI, if accurate to the flagged events over time, would be more like 0.7. So, wrong on both counts.

So something funny is going on here.

The time period (number of days included in the summary statistics sleep report) is adjustable.

So perhaps settings for the number of days are different between the machine versus SH?

Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment. The Advisory Member group provides advice and suggestions to Apnea Board administrators and staff on matters concerning Apnea Board operation and administrative policies - not on matters concerning treatment for Sleep Apnea. I think it is now too late to change the name of the group but I think Voting Member group would perhaps have been a more descriptive name for the group.
(This post was last modified: 01-11-2015 01:45 AM by vsheline.)
01-11-2015 01:43 AM
Find all posts by this user Post Reply Quote this message in a reply
justMongo Offline

Monitors

Posts: 3,840
Joined: Sep 2013

Machine: ResMed VPAP Auto (S9)
Mask Type: Full face mask
Mask Make & Model: ResMed Mirage Quattro
Humidifier: ResMed H5i
CPAP Pressure: 18 IPAPmax - 11 EPAPmin, PS=5
CPAP Software: Other Software

Other Comments: μολὼν λαβέ

Sex: Male
Location: Калифорния

Post: #7
RE: APAP and SH disagree on AHI
(01-10-2015 12:46 PM)TyroneShoes Wrote:  OK, it happened again. Again the Autoset gave the lower reading (1.8) while SH gave the higher reading (2.88). If I do the math, SH is correct according to the number of events it flagged, for AHI as well as for the three individual indexes.

The Autoset is also reporting that I slept (or ran the blower) for 24.0 hours. Nuh-uh, that didn't happen. And if it had, that would mean that its calculated AHI, if accurate to the flagged events over time, would be more like 0.7. So, wrong on both counts.

So something funny is going on here.

I'm not laughing.

I think you are looking at the LCD screen that says "Sleep Report."
It can be set for 1 day or 7 days or 30 days... That's not the one to look at.
It's normally set to 30 days... I am guessing it's set to 1 day.

The report screen you want is called "Sleep Quality." (Has the smiley face, says "last night" -- has number of hours "usage" and the AHI for that period.

How about you pull out your digital camera, put it in macro mode; and shoot a photo of the screen you're looking at.
And, post it.

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.
(This post was last modified: 01-11-2015 06:49 AM by justMongo.)
01-11-2015 06:43 AM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
TyroneShoes Offline

Preferred Members-2

Posts: 505
Joined: Oct 2014

Machine: Resmed S9 Autoset
Mask Type: Nasal pillows
Mask Make & Model: AirFit P10
Humidifier: Resmed H5i
CPAP Pressure: 10-14
CPAP Software: SleepyHead

Other Comments:

Sex: Undisclosed
Location:

Post: #8
RE: APAP and SH disagree on AHI
"Sleep Quality" is what I always have been looking at; one button press on the Autoset, includes smiley for mask fit. I am only looking at one day at a time in SH as well.

So I rebooted the damned thing. Unpowered it for an hour. Today the numbers matched. Makes sense; I have yet to see anything using a microprocessor that didn't need a swift kick in the pants now and then. I once left my old PowerPC-based MacBook up for something like 187 days and it still worked perfectly, but then I needed to upgrade the SW, so that is the record so far.
01-11-2015 01:06 PM
Find all posts by this user Post Reply Quote this message in a reply
justMongo Offline

Monitors

Posts: 3,840
Joined: Sep 2013

Machine: ResMed VPAP Auto (S9)
Mask Type: Full face mask
Mask Make & Model: ResMed Mirage Quattro
Humidifier: ResMed H5i
CPAP Pressure: 18 IPAPmax - 11 EPAPmin, PS=5
CPAP Software: Other Software

Other Comments: μολὼν λαβέ

Sex: Male
Location: Калифорния

Post: #9
RE: APAP and SH disagree on AHI
(01-11-2015 01:06 PM)TyroneShoes Wrote:  So I rebooted the damned thing. Unpowered it for an hour. Today the numbers matched. Makes sense; I have yet to see anything using a microprocessor that didn't need a swift kick in the pants now and then

Same here. I have to reboot my router every so often. I have a friend who never shutdown his Windows based computer -- just let it sleep at night. Eventually a bit error will creep into any system. He'd call and say, "My mouse pointer won't move." And, I would tell him to "hold the power button on for 4 seconds."

We're getting to the point in microelectronics where a bit state is represented by a charge of the order of 100 electrons. A cosmic ray can create that many electron-hole pairs in a bit volume.

Actually, cosmic ray induced upsets have been a design factor in space environments since about 1975 when Binder, Smith and Holman published their paper. IEEE TNS Vol. 22, #6

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.
01-11-2015 02:32 PM
Find all posts by this user Post Reply Quote this message in a reply

Donate to Apnea Board
Crimson Nape Offline

Monitors

Posts: 1,325
Joined: Oct 2014

Machine: ResMed S9 Autoset
Mask Type: Other
Mask Make & Model: P-10 / F&P Simplus / DreamWear
Humidifier: H5i w/Climateline
CPAP Pressure: 8 - EPR 3
CPAP Software: SleepyHead

Other Comments: CMS-50F & 50IW

Sex: Male
Location: Georgia

Post: #10
RE: APAP and SH disagree on AHI
(01-11-2015 01:06 PM)TyroneShoes Wrote:  So I rebooted the damned thing. Unpowered it for an hour. Today the numbers matched. Makes sense; I have yet to see anything using a microprocessor that didn't need a swift kick in the pants now and then. I once left my old PowerPC-based MacBook up for something like 187 days and it still worked perfectly, but then I needed to upgrade the SW, so that is the record so far.

It would seem that the S9 has some undocumented features(bugs). I had to do a total power down to get the Climateline to work in the auto mode after I had it in the manual mode and reset it back to auto.

On a side note: I have a computer running phone attendant software in DOS at a client site that was started in 1997 and hasn't gone down yet. . . Now that I said this, it's probably the kiss of death for it.

Statistics prove that people who have more birthdays live longer.
01-11-2015 02:45 PM
Find all posts by this user Post Reply Quote this message in a reply
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Medicare Advantage Coverage for APAP Evie 3 175 11-30-2016 08:22 PM
Last Post: Mike1953
  cpap and apap not effictive Ezil71 109 3,074 11-05-2016 11:19 AM
Last Post: sonicboom
  Unable to clear throat while on APAP NorthernGuy 5 300 10-17-2016 08:18 PM
Last Post: Sleeprider
  Apap I_will_never_sleep_again 2 273 10-14-2016 02:58 PM
Last Post: trish6hundred
  Travel to Australia with Apap. Newbee2016 10 528 09-24-2016 12:06 PM
Last Post: SharonN
  Looking for complete list of AUTO apap's compatible with Sleepyhead Lanco 9 468 09-21-2016 08:08 PM
Last Post: Sleepster
  Had to STOP APAP Roy289 13 1,036 09-18-2016 08:52 AM
Last Post: Roy289

Forum Jump:

Who's Online (Complete List)