Inclusion Criteria:  Adult patients who can be operated under popliteal sciatic nerve block among patients undergoing surgery for diabetic foot disease  Exclusion Criteria:  Infection of the popliteal region Severe coagulation abnormality Allergic reaction or hypersensitivity to local anesthetics Neurological abnormalities other than diabetic neuropathy in the lower extremity of the operation site When it is impossible to evaluate sensory blockage and motor blockage When the patient refuses