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

Is major leaks in direct proportion to lower AHI?
#1
Is major leaks in direct proportion to lower AHI?
Formerly I used a Respironics M Series/ConforFull2 equipment and I couldn´t use softwares like Sleepyhead to monitor therapy. I had access only to AHI and Leaks by the LCD display in the machine itself, always an AHI around 1.5/2, and a Leak rate around 30/40.
Now, I´m been using my new equipment - Airfsense S10 Autoset / Airfit FFM mask - since Oct,14, and, by observing the Sleepyhead charts everyday, I´m noting an apparently direct relationship between lower AHI numbers and major leaks ocurrences. Is that correct? Can I understand that the machine when facing major leaks do not understand other events like OA, H, and so on correctly?
Thanks.
Post Reply Post Reply
#2
RE: Is major leaks in direct proportion to lower AHI?
That's a very real possibility. Air is flowing at a high rate with a major leak with little back pressure (you exhaling).

Due to the method that ResMed uses to determine whether an event is a CA or OA, certain events may show up as an Unexplained Apnea (UA) or nothing at all. ResMed uses FOT (Forced Oscillation Technique). FOT technically is explained as "introducing small oscillations of pressure, about 1cm/h2o peak to peak at 4hz, to the current pressure and using an algorithm on the resulting flow and pressure to measure airway patency."

If there is a major leak those oscillation results may be skewed or not readable. It will also be difficult to detect a proper HA with a high leak. There is little change of flow.
Using FlashAir W-03 SD card in machine. You can download your data through wifi with FlashPAP or Sleep Master utilities.

I wanted to learn Binary so I enrolled in Binary 101. I seemed to have missed the first four courses. Big Grinnie

Stick it to the man, Download OSCAR and take back control of your data!

Thanks Ian. Like I didn't have enough Honey-Do projects to tackle. Mornincoffee
Post Reply Post Reply
#3
RE: Is major leaks in direct proportion to lower AHI?
M series leak 30/40 L/m is rather good as the machine report total leak but the same leak rate would be considered high leak on Resmed machines as the machine report unintentional leak. During high level of unintentional leak, AHI value cannot be analysed correctly, also 'unknown apnea' is a sure sign of of high leak
Post Reply Post Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  Lower jaw or upper jaw? Breathworker 2 301 10-30-2024, 05:51 AM
Last Post: SeePak
  Very high lpm leaks 59Bugeye 0 105 10-29-2024, 08:02 AM
Last Post: 59Bugeye
  Cant manage mask leaks at all sfgiants123 4 233 10-18-2024, 08:19 PM
Last Post: SarcasticDave94
  Struggling to Lower AHI Below 5 terumi 42 1,703 10-14-2024, 04:45 PM
Last Post: Jay51
  Fighting Leaks and Other Challenges Brennie 8 335 10-08-2024, 03:11 PM
Last Post: Brennie
  Leaks with Brevida pillow mask Ticman1 13 4,244 10-07-2024, 04:30 AM
Last Post: 40plus
  Are these leaks okay? bettyryan 4 330 10-06-2024, 05:23 AM
Last Post: R750R


New Posts   Today's Posts


About Apnea Board

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