Dual-subsartorial Block versus Femoral Triangle Block for Quadriceps Strength after Total Knee Arthroplasty: a Randomized Controlled Trial

INTERVENTION: Dual‐subsartorial block,Femoral triangle block Experimental Procedure/Surgery,Active Comparator Procedure/Surgery CONDITION: Total knee arthroplasty, Dual‐subsartorial block, Femoral triangle block, Quadriceps strength, Analgesic efficacy We hypothesize dual‐subsartorial block has efficacy of quadriceps sparing superior to Femoral triangle block for patients undergo unilateral TKA ; Total knee arthroplasty, Dual‐subsartorial block, Femoral triangle block, Quadriceps strength, Analgesic efficacy PRIMARY OUTCOME: Quadriceps strength At postoperative 6 hours Grade 0‐5 SECONDARY OUTCOME: Morphine consumption 24 hours At postoperative 24 hours Mg INCLUSION CRITERIA: Age 40‐80 years old, Elective primary unilateral TKA, American Society of Anesthesiologists physical classification 1‐3