Nerve Root Infilration and Sympathetic Block

The nerve root of L7 was exposed, and a clamp was applied to simulate radiculopathy. In traradicular blood flow was measured at the takeoff point of the nerve root and at the distal to the dorsal root ganglion before and after nerve root infiltration with 2 lidocaina or physiological saline solution (control group),or sympathetic ganglion block with 2 lidocaine,