It's all I use. My LPM is only 13 but I jerk the mask off and just stick the tube in my mouth.
I used 15LPM and helped out after 20mnt or so
I had to get a 25lpm regulator for myself. At my worst I could empty the 3L reservoir bag at a 25lpm flow rate 3/4's of the way through a breathe. The trick is to make sure your full breathes are 100% O2, even if you have to hold your breathe for a sec for the bag to fill up a little more. Full, deep breathes back to back to back. For me it was till the point of almost giving myself a head-rush and passing out.
exactly? I know I use 15 lpm high flow, and the mask bothers me, so I just suck in through this special mouth peace. Problem is I fight it even with the 02 for 10-20 min, but it's a hell of lot better than fighting it for 60-120 minutes or more.-------on bad days I'll wake several times to battle it with 02, but since there are no injections availabel to me, it's all I got