Unsatisfactory analgesia for major knee surgery with femoral nerve block (FNB) alone was reported and the additional benefit of sciatic block to continuous femoral nerve block (CFNB) was not conclusive. The aim of the present study was to find the benefit of the additional mini-dose spinal morphine ( mg) to CFNB for postoperative pain control and to compare their associated side effects after total knee arthroplasty (TKA). |