I believe that to qualify for bipap:
1. Patient must be able to spontaneous breath
2. Patient must not crash when you take them off.
#2 there is something that's often overlooked. Many times I've put someone on a BiPAP because their SpO2 was low and as soon as you take them off to give them a drink of water their SPo2 drops. If they crash when you take them off the BiPAP you now have two choices:
2. Make the patient a DNR
I can see some good arguments for this discussion, however, I have never seen a patient who could not come off the BiPAP survive unless intubated. It's just not a good situation. It's basically a tortuous way to end your life.