A two-year sonographic follow-up after intratendinous injection therapy in patients with tennis elbow.

Abstract

Tennis elbow is a tendinopathy affecting the upper extremity. Recent studies have shown high sensitivity for ultrasound (US) examination and high specificity for colour Doppler (CD) examination. There are no mid- or long-term follow-up investigations of the tendon structure and blood flow using these techniques. To use US and CD to study structure and blood flow in the extensor origin in patients with tennis elbow treated with intratendinous injections. Follow-up study. Sports Medicine Unit, Umeå University. 25 patients (28 elbows), mean age 46 years (range 27-66), treated with intratendinous injections due to chronic pain from tennis elbow. US and CD examination of the extensor origin was carried out at inclusion and at follow-up two years after intratendinous injection treatment with polidocanol and/or a local anaesthetic. US (structure) and CD (blood flow) findings. All patients had structural tendon changes and high blood flow at inclusion when given the injection treatment. At the two-year follow-up, structural tendon changes were seen in 20/28 elbows and high blood flow was seen in 4/28 elbows. The majority of patients with a good clinical result after treatment had no visible blood flow (17/20), but the structural changes showed no relation to a good result (13/20 remaining changes). Doppler findings, but not structure, might be related to the clinical result after intratendinous injection treatment of tennis elbow.