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

How Leaks impact AHI
#1
Recent experience has demonstrated to me just how mask leakage affects AHI numbers reported by ResScan software, and perhaps this example may be of interest to others.
During a four night period (June 3-6), my 95% Leakage rate was 50.4 and the AHI for that same period was 12.5. During the next four-night period, the 95% leak rate dropped to 7.8 and the AHI was 2.6! A leak-elimination tip from a fellow board member is responsible for this dramatic change, but the numbers clearly show how excessive leakage skews AHI reports.
Post Reply Post Reply
#2
(06-11-2012, 07:19 AM)Dawei Wrote: but the numbers clearly show how excessive leakage skews AHI reports.

If the leak is large, the machine can't measure AHI in any meaningful way. If you dig a little deeper, and look at the components of he AHI, they become even less meaningful. The machine cannot, for example, distinguish between a CA and a OA when there's a large leak.

The bottom line is this. If you have large leaks, regardless of the reported AHI, your therapy is ineffective.
Sleepster
Apnea Board Moderator
www.ApneaBoard.com


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.
Post Reply Post Reply
#3
Along the line of what you suggested, Sleepster, I noticed that when significant leaking is present, I see lots of yellow (unknown) event markers mixed in with the red markers on the ResScan events graph. I don't see much in the way of CSA markers, but the software actually announces with those yellow markers that it doesn't recognize the leak events.
Post Reply Post Reply




Possibly Related Threads...
Thread Author Replies Views Last Post
  Large Mask Leaks stanleydean 2 85 04-24-2017, 05:50 PM
Last Post: stanleydean
  Addressing Mask Leaks wullybully76 13 287 04-22-2017, 10:57 PM
Last Post: PaytonA
  Leaks and Mask Test mmdupas 11 407 03-20-2017, 02:55 PM
Last Post: thomashowe
  Leaks L/M harmon k 2 173 03-20-2017, 01:21 PM
Last Post: justMongo
  Do large leaks affect AHI numbers? ppca 8 355 03-19-2017, 02:30 AM
Last Post: ppca
  Do I still meet the 4 hour a night compliance if my mask leaks? UKwildcatfan 4 304 03-18-2017, 01:25 AM
Last Post: Ockrocket
  Large leaks Ctyankee 1 135 03-15-2017, 04:15 PM
Last Post: justMongo

Forum Jump:

New Posts   Today's Posts




About Apnea Board

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

For any more information, please use our contact form.