pain 3 weeks after cardiac catherization

My husband is 63 and 25 days ago he underwent bypass surgery and he had a cardiac catherization 2 days prior to the surgery. My question is why is he having alot of pain,burning and numbness in his right leg(catherization leg) 3 weeks later? The vains were grafted from his left leg and there is no pain there.The pain,burning and numbness radiates down the front of his leg to the knee and does not go away. Could a nerve have been effected by the procedure? or is this normal.

[ed34]

I believe that when the angioseal is applied, which dissolves after around 90 days and allows the femoral artery to heal, it can press against a nerve in the leg giving such sensations.