Ultrasound-Guided Cutting Wire Release of the Proximal Adductor Longus Tendon: A Feasibility Study

Background: Adductor longus tendinopathy is a well-known etiology of chronic groin pain in elite athletes. Surgery is indicated for those who fail conservative treatment. No studies to date have evaluated the feasibility of an ultrasound-guided release of the proximal adductor longus tendon.

Purpose/hypothesis: The primary aim of this study was to determine the feasibility of an ultrasound-guided selective adductor longus release with a cutting wire. A secondary aim was to determine safety by avoiding injury to adjacent structures. We hypothesized that the proximal adductor longus tendon can be released under ultrasound guidance with a cutting wire without injury to adjacent neurovascular or genitourinary structures.

Study design: Descriptive laboratory study.

Methods: Ten adductor longus tendons (5 cadaveric specimens) from 4 males and 1 female between 76 and 89 years of age with a mean body mass index of 21.9 kg/m² (range, 16.8-29.6 kg/m²) were used during this study. A single experienced physician sonographer performed ultrasound-guided proximal adductor longus tendon releases on all cadaveric specimens using a cutting wire. Dissection was performed by a second physician to determine the completeness of the tendon transections and to detect injury to adjacent neurovascular or genitourinary structures.

Results: All 10 adductor longus tendons were transected. Eight of 10 transections were complete, whereas in 2 transections, >99% of the tendon was transected. There were no injuries to adjacent genitourinary or neurovascular structures.

Conclusion: Ultrasound-guided adductor tendon release is feasible and safe in a cadaveric model. Further translational research should be performed to determine whether these results can be replicated in the clinical setting.

Clinical relevance: Adductor longus tendinopathy frequently requires surgical intervention and prolonged time away from sport. The present study suggests that a selective adductor longus tendon release can be performed with ultrasound guidance. This procedure warrants further translational research to explore its use in clinical practice.