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Effect of Adding a Biceps Femoris Short Head Block to Adductor Canal Block for Analgesia After Total Knee Arthroplasty

NCT07803887 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 122

Last updated 2026-09-04

No results posted yet for this study

Summary

Total knee arthroplasty (TKA) is frequently associated with moderate to severe postoperative pain, which may delay mobilization, increase opioid consumption, and impair functional recovery. Ultrasound-guided adductor canal block (ACB) is widely used as part of multimodal analgesia because it provides effective analgesia while preserving quadriceps muscle strength. However, ACB alone may provide insufficient analgesia for the posterior aspect of the knee. The biceps femoris short head (BiFeS) block is a novel ultrasound-guided regional anesthesia technique targeting the posterolateral sensory innervation of the knee and may enhance postoperative analgesia when combined with ACB. However, clinical evidence regarding its analgesic efficacy in patients undergoing total knee arthroplasty remains limited. This prospective, randomized, controlled trial aims to compare postoperative analgesia between ultrasound-guided adductor canal block alone and adductor canal block combined with a biceps femoris short head block in adult patients undergoing primary total knee arthroplasty under spinal anesthesia. Participants will be randomly assigned in a 1:1 ratio to receive either ACB alone or combined ACB plus BiFeS block. The primary outcome is cumulative opioid consumption during the first 48 postoperative hours. Secondary outcomes include postoperative pain intensity, time to first analgesic request, quadriceps muscle strength, functional recovery, postoperative recovery quality, postoperative nausea and vomiting, patient and surgeon satisfaction, length of hospital stay, and block-related complications.

Conditions

Interventions

PROCEDURE

Ultrasound-Guided Adductor Canal Block

An ultrasound-guided adductor canal block will be performed before the induction of spinal anesthesia using a standardized technique. Following ultrasound identification of the adductor canal, 30 mL of 0.25% bupivacaine will be injected into the adductor canal adjacent to the femoral artery to provide perioperative analgesia for primary unilateral total knee arthroplasty.

PROCEDURE

Ultrasound-Guided Biceps Femoris Short Head Block

An ultrasound-guided biceps femoris short head block will be performed before the induction of spinal anesthesia using a standardized technique. Following ultrasound identification of the fascial plane adjacent to the short head of the biceps femoris muscle, 20 mL of 0.25% bupivacaine will be administered to provide additional posterolateral knee analgesia as an adjunct to the adductor canal block.

Sponsors & Collaborators

  • Antalya Training and Research Hospital

    lead OTHER_GOV

Principal Investigators

  • Serhat Gulersen, MD, · University of Health Sciences Türkiye, Antalya Training and Research Hospital

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-09-01
Primary Completion
2027-02-20
Completion
2027-03-20

Countries

  • Turkey (Türkiye)

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07803887 on ClinicalTrials.gov