Accuracy of ultrasound-guided iliopsoas tendon injection after total hip arthroplasty: a retrospective observational study.

Purpose: To describe and characterize the accuracy and benefit of a technique for performing ultrasound-guided needle placement for iliopsoas peritendon or bursa injections as an alternative method to fluoroscopic guidance.

Materials and methods: Patients with a history of total hip arthroplasty who were referred by their orthopedic surgeon for iliopsoas peritendon or bursa corticosteroid injection for iliopsoas impingement syndrome between June 2017 and December 2019 were eligible for inclusion. Of these patients, 19 received a total of 26 ultrasound-guided needle placement followed by confirmatory fluoroscopic guidance prior to injection. Pre-injection and post-injection VAS scores were collected to monitor pain. Additionally, the patients were followed for 6 months via chart review after their injection to assess for complications, need for repeat injections, and progression to surgical intervention. The accuracy of a longitudinal in-plane distal to proximal approach to ultrasound guided needle placement was then evaluated.

Results: Ultrasound guided needle placement using a longitudinal in-plane distal to proximal approach demonstrated spread of contrast material in the intended anatomic location with fluoroscopic confirmation in patients who underwent iliopsoas peritendon or bursa injection post total hip arthroplasty.

Conclusion: Ultrasound guided needle placement using a longitudinal in-plane distal to proximal approach can be an effective alternative technique for diagnostic or therapeutic iliopsoas peritendon injection in patients with total hip arthroplasty.