Abstract
This retrospective study evaluated the technical success rate of a novel injection into the long head of the biceps tendon sheath by a rotator interval approach in 26 patients. A 25-gauge, 1.5-in needle was positioned into the rotator interval from a lateral approach, where a therapeutic injection was performed. Postinjection sonograms images were reviewed to assess for fluid within the sheath to calculate the technical success rate. Fluid distention of the biceps tendon sheath was shown in all 26 cases, corresponding to a 100% technical success rate. In addition, postinjection ultrasound imaging of the anterior shoulder provided additional diagnostic findings in 6 of 26 patients (23%).
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