RecruitingPhase 4Drug trialSuprainguinal Fascia Iliaca Block With vs Without DexmedetomidineThe investigators are evaluating postoperative outcomes in patients undergoing hip replacement surgery performed with either spinal or general anesthesia, who also receive a suprainguinal fascia iliaca block using either perineural ropivacaine alone or ropivacaine combined with dexmedetomidine.