Application of hypobaric ropivacaine in unilateral spinal anesthesia in patient undergoing lower limb traumatic operation and its effect on patient-controlled epidural analgesia

Objective To observe the effect of unilateral spinal anesthesia with hypobaric ropivacaine on patient undergoing lower limb traumatic operation,and its influence on patient-controlled epidural analgesia.Methods One hundred and twenty patients undergoing lower limb traumatic operation were divided randomly into four groups.Patients in group L1 or group L2 received hypobaric ropivacaine 7.5-15.0 mg or 15.0-22.5 mg respectively,while patients in group W1 and group W2 were administered hyperbaric ropivacaine 7.5-15.0 mg and 15.0-22.5 mg respectively.Patient-controlled postoperative epidural analgesia consists of ropivacaine 150 mg,sufentanial 0.05 mg.The anesthetic effect and Bromage score were recorded.Results Patients in group L1,group L2 and group W2 achieved satisfactory block.Sensory and motor nerve block onset time in group L was shorter than those in group W.Obviously,the Bromage score of either lower limb in group L1 were different,the score of right side were lower than those the broken one.The incidence of hypotension and uroschesis in group L1 were lower than that in group L2 and group W2 (P0.05).Conclusion Application of 0.3% hypobaric ropivacaine in unilateral spinal anesthesia in patient undergoing lower limb traumatic operation provided rapid onset,more satisfactory sensory block with less hemodynamic changes and less complications.The motor block was also limited in the operative side limb after received patient-controlled postoperative epidural analgesia.