Femoral Triangle Block vs Adductor Canal Block on Early Quadriceps Function After Total Knee Arthroplasty

The goal of this clinical trial is to compare the effects of femoral triangle block (FTB) and adductor canal block (ACB) on early quadriceps function after total knee arthroplasty (TKA). The main question it aims to answer is whether FTB causes more early quadriceps functional impairment than ACB under a standardized multimodal analgesia protocol. Researchers will compare FTB and ACB using a composite binary functional outcome measured 6 hours after block completion. Quadriceps functional impairment is defined as the inability to perform a structured straight leg raise or quadriceps muscle strength \<50% of the preoperative baseline. Participants will be randomly assigned to receive ultrasound-guided FTB or ACB. All participants will also receive a popliteal plexus block and standardized multimodal analgesia.

NCT Number	NCT07524387
Lead Sponsor	Social Medical Corporation Daiyukai
Conditions	Total Knee Arthroplasty, Total Knee Arthroplasty Recovery, Total Knee Arthroplasty Postoperative Pain
Enrollment	136 participants
Start Date	2026-04-13
Primary Completion	2029-03-15 (estimated)
Study Completion	2029-03-31 (estimated)
Updated on ClinicalTrials.gov	2026-04-16