Links to SleepyHead Charts at the bottom. I have been struggling to get my AHI under 5. Most of the strikes against me have been hypopneas and CAs. The APAP has caused me a great deal of congestion which may explain the hypopneas. Then I remembered when I was experimenting with TheraVent I had some success with sleeping better and would wake with ZERO congestion.
I took a TheraVent and modified the vent by closing it with tape and opening two new 3.5mm vents directly in the center of each side with a leather punch. I believe the original vent was 4mm so the new total was 7mm.
Once I applied it to my nose I used 1 inch 3M micropore tape vertically over the center of my mouth to encourage me to keep it closed. I used a full face mask with liner and pressures 7.5 to 12.
For the past 4 nights my AHI has roamed between 1 and 3 rather than 6 to 9 or 10. My median respiration has dropped from 20 to about 15.5 and my expiration has increased by about 1 second. My median pressure was around 10 rather than staying at 12 all night.
I'm pretty excited to say the least.
I have had several night's of success and then did a night again without TheraVent (charts below). I think the success has something to do with the TheraVent preventing CO2 washout.
The forum software would not allow me to post links to my SleepyHead charts but I am happy to show them if there is another way. They are much larger than the 200kb allowed for attachments.
I'll try to keep an open mind, but Theravent seems like snake oil.
It is designed to help keep your airway open when you exhale. But the pressure of your own expiration does this automatically, regardless of how severe your SA might be.
A xPAP machine is designed to keep your airway open as you inhale. That is where the problem is for OSA sufferers. And I hope I don't actually need to point this out, but that is a very different thing from exhalation. So there is a significant difference between what SA is caused by (airway collapse on inhale) and what the intent of this product is (helping keep the airway open on exhale).
This means that Theravent is trying to treat a different issue than sleep apnea. That's like tying a horrific event like 911 to a particular country, and then invading a different country in retaliation.
Its just a ridiculously-overpriced piece of tape with a valve in it that opens fully for normal inhalation (the point in respiration when SA is problematic), and partially closes for exhalation (a different point in respiration where SA is not problematic). So if you have SA, which is a problem with inhalation, how can this possibly help? It's not even in the system during inhalation.