ObjectiveTo evaluate the effects of femoral nerve block combined with obturator nerve block on postoperative analgesia in patients with total knee arthroplasty.
Methods Forty patients scheduled by unilateral total knee arthroplasty, any gender, age 55-75 years old and ASA class Ⅰ or Ⅱ were randomly divided into the femoral nerve block group(group A, 20 cases) and femoral nerve block combined with obturator nerve block group(group B, 20 cases).After anesthesia induction, two groups were treated with the femoral nerve blocking guided by ultrasound and 20 mL of 0.5%ropivacaine injection.The group B was treated with lateral obturator nerve block guided by ultrasound, and injected with the 10 mL of 0.5 % ropivacaine.When the postoperative visual analog scale(VAS) score was ≥3 points, the 0.1 mg/kg of nalbuphine was intravenously injected with 3 mL/h and locking time for 25 min.If the VAS score was still ≥3 points, the intravenous naboo was injected with 0.1 mg/kg to remedy the analgesia.The time to start using analgesics, total naboo dosage after 24 h and 48 h of surgery, incidence rate of neuroblock-related complications, and occurrence of pruritus, nausea and vomiting of adverse reactions were recorded.
ResultsCompared with the group A, the time to start using analgesics in group B prolonged, and the total naboo dosage in group B after 24 h and 48 h of surgery were less than those in group A(P < 0.01).The differences of the incidence rates of nausea, vomiting and itching between two groups were not statistically significant(P>0.05).No nerve block-related complication was found in two groups.
Conclusions The postoperative analgesia effects of femoral nerve combined with obturator nerve block is better than that of femoral nerve block alone in patients with total knee arthroplasty.
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