I used forearm crutches for years. one shoulder subluxed the other dislocates easily. the crutches are very hard on your shoulders. well they were on mine anyway.
The tilt table test seemed to be very helpful in figuring out what was making me pass out. the test was positive before they put the med in the iv. once the meds were in, my heart rate went extremely high. very hard not to pass out. It was a miserable test.