- 1. The meridians of Zhongfu, Yunmen, Lieque and Neiguan acupoints with the operative incision or scar; 2. Local skin infection in acupoints; 3. Upper or lower extremity nerve injury patients; 4. Spinal operation history; 5. Participating in other clinical trials within four weeks; 6. Cardiac pacemaker; 8. Patients who have preoperative pain and are using central analgesic medications. Opiate addiction, and dependence; 9. The patients with serious diseases of the central nervous system and severe mental illness in pre-operation. 10. Emergency bypass surgery.