Dexmedetomidine as an Adjuvant for Femoral Nerve Block and Functional Recovery After Total Knee Arthroplasty

Patients in the dexmedetomidine group receive single-shot femoral nerve block preoperatively using a mixture of 0.375% ropivacaine and 1.0 μg/kg dexmedetomidine, in a total volume of 20 ml.

Patients in the control group receive single-shot femoral nerve block preoperatively using a mixture of 0.375% ropivacaine and normal saline, in a total volume of 20 ml.