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Ultrasonographic Predictors of Adductor Canal Block Effectiveness in Total Knee Arthroplasty

NCT07730216 · Status: RECRUITING · Type: OBSERVATIONAL · Enrollment: 623

Last updated 2026-08-12

No results posted yet for this study

Summary

Total knee arthroplasty (TKA) is associated with substantial postoperative pain and opioid requirements, making effective multimodal analgesia essential for early mobilization, functional recovery, and reduction of opioid-related adverse events \[1,2\]. Adductor canal block (ACB) has become a key component of enhanced recovery after surgery (ERAS) protocols because it provides effective anterior knee analgesia while largely preserving quadriceps muscle strength \[2-4\]. However, analgesic efficacy after ACB remains variable, and some patients require rescue opioid analgesia despite technically successful block placement \[5\]. Although ultrasound guidance improves block accuracy, factors such as tissue depth, anatomical variations, saphenous nerve visibility, and injectate spread pattern may influence clinical outcomes \[6,7\]. Prospective evidence regarding the predictive value of these ultrasound-derived parameters for ACB analgesic failure remains limited. Therefore, this study aims to evaluate whether preoperative ultrasound-derived tissue and target parameters-including skin-to-target depth, subcutaneous fat thickness, muscle thickness, saphenous nerve visibility, and injectate spread pattern-can predict ACB analgesic failure and early postoperative analgesic outcomes following TKA.

Conditions

  • Arthroplasty, Replacement, Knee
  • Nerve Block Assessment
  • Pain, Postoperative Arthroscopy

Interventions

PROCEDURE

Adductor Canal Block (ACB) Only

The adductor canal block (ACB) will be performed in the post-anesthesia care unit (PACU) after regression of spinal anesthesia.

Sponsors & Collaborators

  • Konya City Hospital

    lead OTHER

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-08-09
Primary Completion
2027-07-13
Completion
2027-07-13

Countries

  • Turkey (Türkiye)

Study Locations

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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 NCT07730216 on ClinicalTrials.gov