A sleep study isn't a bad idea, but, the problem is the majority of sleep study facilities and their staff are geared to sleep apnea rather than muscular weakness, so, frequently the expiratory pressure of the bipap will be set way too high.
More in a minute, I need to locate a video...
okay, I'm back,
This video features my pulmonologist, It is somewhat dry and technical, but still very good. The symposium is actually for those with post polio syndrome, but it also applies to other neuromuscular conditions, and I believe he does differentiate what is beneficial to different patient groups when need be. Its been a while since I watched it, but had it bookmarked in my computer...
Noah Lechtzin, MD - Breathing & Sleep Symposium 2009 - YouTube
Anyway, my point is that he is not a big fan of sleep clinics just due to how they are geared toward straight sleep apnea problems.
If an ALS patient does not have fvc scores low enough for insurance to cover the bipap machine, oftentimes other readings will, (Such as MIP and MEP scores) Medicare and other insurance seem to be quite lenient in accepting this type of documentation to support a prescription.
Anyone with ALS should have a bipap with backup feature (will breathe for you when you don't take a breath on your own.
Here is a transcript that is also pretty informative:
http://premiermedicalcorp.com/pdf_f...Lateral_Sclerosis,_Problems_And_Solutions.pdf
As many of you know, I'm a huge advocate of bipap, and don't know what I would do without it. My last PFT showed a 45% drop in my fvc when tested supine after being tested with me sitting up, and that's with me
awake (once we enter REM stage of sleep the other accessory muscles shut down, and its only the diaphragm doing the breathing).
My RT taught me how to adjust my machine on my own, and that has been beneficial for me in not being dependent on waiting for a "professional" to come to my aide. That gets old, if you know what I mean.
No matter what the stumbling blocks, its worth the effort of getting past them to use the bipap. Somewhere there is a mask that will work, and there are pressure settings that will help, not hinder, it oftentimes is just a lot of trial and error.
Here is a video from the same symposium as the previous one. I had it bookmarked in my computer too, and will confess that I don't remember watching it, at least not in its entirety, but it should (hoping it has) good info on types of ventilation etc.
Noah Lechtzin & Louis Boitano - Breathing & Sleep Symposium 2009 - YouTube