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I am using the Sefam S Box CPAP and find there is a discrepancy in AHI readings provided by Sefam Analyze software and Sefam Access Lite phone app. Here are 4 days readings.
Analyze. Access Lite
8.3 4.1
11.7 6.2
10.3 3.8
10.8 5.0
Has anyone else had this problem? Do you know why there is this difference?
I contacted Sefam but did not find their reply helpful. They said
"The discrepancy in the values must be due to the difference of the analysis parameters.
On the app, you cannot configure it, and it is by default :
Ramp/over the limit leak : EXCLUDEDCH/CA : Included.
We cannot comment further in regard to Sefam Analyze data, as this software is for clinician use only"
Thank you
Paul
Can your machine use Oscar? If so, download it. It's our free reporting program that can create wonderful charts that tell us much about each night's sleep. Then we can advise you on settings changes, etc. At the top of every page, there is a link to Oscar with all its instructions in the black ribbon. Good luck!
Paul,
Does the software you're using list the breakdown of the AHI. The AHI should include Obstructives, Hypopnea and Clear Airway events.
I can't say for sure, so I'm just guessing, but is it possible that the Access Lite doesn't report Clear Airway events, whereas the Analyze does? Hence the difference.
If you're able, use the attachment feature and post some of your results from the two software packages you are using.
We may be able to see the difference.
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.
01-07-2025, 10:08 AM (This post was last modified: 01-07-2025, 10:11 AM by PaulHolder.)
RE: Sefam CPAP AHI reporting discrepancy.
Hi OpalRose
Thank you for your reply. I have attached 3 screenshots pages of the Sefam Analyze for the night 21\22 Dec and screenshot from Sefam Access Lite (black background).
The Analyze excludes ramp and over leak limit.
The only information on the Acces Lite is the reply from Sefam I copied in my original post.
I am grateful to you for looking at these and look forward to your observations.
Regards Paul
Waveform 21/22 Dec
01-07-2025, 11:31 AM (This post was last modified: 01-07-2025, 11:33 AM by SarcasticDave94. Edited 1 time in total.)
RE: Sefam CPAP AHI reporting discrepancy.
From image 1, it reports what should be Obstructive Apnea as OBS AH 4.0 events/hr & 24 overall events, what should be Central Apnea as CNT AH 13.5 events/hr & 81 events overall.
Centrals are over 3 times the Obstructive per hour, but 6 times more overall. I'm not familiar with this Sefam. If it's a monitor, this indicates to me your Central Apnea will be predominant, meaning the need to treat via something like the ResMed AirCurve 10 or 11 ASV. It may be called Lumis ASV or similar there.
INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEBSITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
Hi Dave
Thank you for taking the time to look at the figures I posted.
I am using the Sefam S. Box APAP which is used extensively by the NHS here in the UK. Unfortunately it is reporting conflicting AHI figures depending on whether I use their mobile app Sefam Access Lite or their more comprehensive Sefam Analyze software so an not sure if the APAP is controlling the obstructive and central apnoea and hypopnea or not. Here are 4 days readings I posted in my original message.
Quite a difference.
Analyze software /. Access Lite
8.3 / 4.1
11.7 / 6.2
10.3 / 3.8
10.8 / 5.0
Thank you Paul
OK, being an APAP of some sort, it may be increasing Central Apnea, but hard to decipher without any data prior to any CPAP. (unless I have missed this info) Given that the Sefam is allowing 24 Obstructive Apnea per night, it's certainly not adding much therapy it seems. A pressure of 4.2 cmH20 is just seeming to add more problems than helpful.
Like I said above, they should have given a base diagnostic without CPAP to see what events there were without pressure. Even that low 4.2 influences all events, but without that diagnosic it's near impossible to know what therapy action to take.
INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEBSITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
Going back to your original question as to the discrepancy of reporting between the Access Lite and the Analyze software.
Scroll down to the bottom of this page and look at the list of threads that may be related to what you are experiencing with your SEFAM S Box and the discrepancy in reporting of apneas.
Read the first post in this thread, and it is as I suspect that the two software packages you are using each report different parameters.
The OP in this thread states that the Access Lite doesn't allow for a daily report, just a weekly. If true, then what you are seeing are daily figures with one software package and an average or weekly report with the phone app.
Again, I'm not at all familiar with the Stefan or its software, but if it were me, I'd ask for a different brand machine.
Are you able to get a ResMed in your country? At least you would be able to use the OSCAR software with the assurance that the software only reports what the Cpap writes to the SD card.
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.
