NCT07506629

Adductor Canal Block Methods in Bilateral Total Knee Arthroplasty

Comparison of Surgeon-Performed Intraoperative Adductor Canal Block and Ultrasound-Guided Anesthesiologist-Performed Block in Bilateral Total Knee Arthroplasty

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 48 (estimated)
• Sponsor: Yonsei University · Academic / Other
• Sex: All
• Age: 60 Years
• Healthy volunteers: Not accepted

Summary

This study aims to compare the analgesic efficacy of surgeon-performed intraoperative adductor canal block (ACB) and ultrasound-guided anesthesiologist-performed ACB in patients undergoing bilateral total knee arthroplasty (TKA). In a prospective, randomized paired design, each patient will receive surgeon-performed ACB on one knee and anesthesiologist-performed ACB on the contralateral knee. The primary outcome is postoperative pain measured using the Numeric Rating Scale (NRS), and the study is designed to evaluate the non-inferiority of surgeon-performed ACB. Secondary outcomes include opioid consumption, time to first ambulation, length of hospital stay, postoperative complications, and patient-reported outcome measures (PROMs). Additionally, postoperative ultrasound evaluation will be performed to assess the distribution pattern of local anesthetic within the adductor canal, including cross-sectional area and longitudinal spread. This study is expected to provide evidence regarding the clinical effectiveness and technical accuracy of surgeon-performed ACB in comparison with the conventional ultrasound-guided technique.

Conditions

• Knee Osteoarthritis
• Total Knee Arthroplasty
• Postoperative Pain
• Peripheral Nerve Block
• Adductor Canal Block

Interventions

Type	Name	Description
BIOLOGICAL	Surgeon-Performed Adductor Canal Block	An adductor canal block performed intraoperatively by the surgeon using an anatomical landmark-based technique. The injection is administered at approximately 8 cm proximal to the distal femur, with the needle directed medially and posteriorly. A total of 20 mL of 0.3% ropivacaine mixed with epinephrine is injected using a standardized approach without ultrasound guidance.
BIOLOGICAL	Ultrasound-Guided Adductor Canal Block	An adductor canal block performed by an anesthesiologist under ultrasound guidance. The saphenous nerve and femoral artery within the adductor canal are identified using real-time imaging, and 20 mL of 0.3% ropivacaine mixed with epinephrine is injected using an in-plane technique.

Timeline

• Start date: 2026-05-01
• Primary completion: 2029-01-01
• Completion: 2029-03-01
• First posted: 2026-04-01
• Last updated: 2026-04-01