No CPAP is not the same as breathing on his own. People with SCI do much better weaning from the ventilator by being off completely (no vent, no CPAP) for multiple short periods of time during the day, then gradually lengthening each of these periods. This builds strength in the respirtory muscles gradually, which CPAP does not.

I suspect his protein is low because he has large draining pressure ulcers and has not been able to keep up with his body's demand for protein which is increased by acute injury, stress, and trying to heal. Instead of trying to find the cause, the treatment at this time should be to super-supplement his nutrition, and perhaps consider a short course (6-8 weeks) of an anabolic steroid. The safest one to use for this purpose is Oxandralone. Because it helps to build muscle mass, it has been helpful in many people with SCI during vent weaning. It also has been studied extensively as a helpful drug to increase the speed of pressure ulcer healing.

(KLD)

(KLD)