Block Evaluation After the placement of the block, the tibial (bottom of the foot) and common peroneal (top of the foot) will be assessed for motor and sensory loss. Motor loss will be graded as such: 0= no motor strength; 1 = some loss, 2 = full strength. using ice in a PVC glove every 5 minutes for 30 minutes. Sensory loss will be graded as such: 0 = no sensation to ice; 1 = some loss; 2= complete sensation to ice. If the block does not produce complete sensory loss in both distribution within 30 minutes, the block is defined as a failure. It is up to the discretion of the anesthesiologist if he wishes to perform a rescue block or supplement with local field block or to perform a general anesthesia.