For mild to moderate (pain varies) crps of leg, approximately how many lumbar sympathetic blocks? One? Three?
Typically if 1 does not provide any response then a lot of doctors will stop there.
Some doctors may try a 2nd to completely rule out any benefit. I would not go for 3 if the 1st 2 fail.
COMPLEX REGIONAL PAIN SYNDROME
LUMBAR SYMPATHETIC BLOCK