Adductor Canal Block Methods in Bilateral Total Knee Arthroplasty

Sponsor
Yonsei University
Study ID
NCT07506629
Status
Not Yet Recruiting

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Conditions

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

Eligibility Criteria

Sex
ALL
Age
60 Years - N/A
Healthy Volunteers
Not accepted

Interventions

  • Surgeon-Performed Adductor Canal Block — BIOLOGICAL
    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.
  • Ultrasound-Guided Adductor Canal Block — BIOLOGICAL
    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.

Study Details

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.

Key Dates

First listed
Apr 1, 2026
Start date
May 1, 2026
Status verified
Mar 2026
Primary completion
Jan 1, 2029
Completion
Mar 1, 2029

Study Design

Enrollment
48 participants (estimated)
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT

Arms

  • Experimental: Surgeon-Performed Adductor Canal Block
    Adductor canal block performed intraoperatively by the surgeon using an anatomical landmark-based technique. The injection is administered during surgery without ultrasound guidance using a standardized approach and the same type and volume of local anesthetic as the comparator.
  • Active Comparator: Ultrasound-Guided Adductor Canal Block
    Adductor canal block performed by an anesthesiologist under ultrasound guidance using real-time imaging. The same concentration and volume of local anesthetic are administered using a standardized ultrasound-guided technique.

Primary Outcome Measure

Pain (Numeric Rating Scale) [ Time Frame: Baseline, postoperative day 0 (afternoon), postoperative day 1 (morning and afternoon), and postoperative day 2 (morning) ]

Central Contacts

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