title: A two-year sonographic follow-up after intratendinous injection therapy in patients with tennis elbow.
abstract: BACKGROUND
  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.
  
  
  OBJECTIVE
  To use US and CD to study structure and blood flow in the extensor origin in patients with tennis elbow treated with intratendinous injections.
  
  
  METHODS
  Follow-up study.
  
  
  METHODS
  Sports Medicine Unit, Umeå University.
  
  
  METHODS
  25 patients (28 elbows), mean age 46 years (range 27-66), treated with intratendinous injections due to chronic pain from tennis elbow.
  
  
  METHODS
  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.
  
  
  METHODS
  US (structure) and CD (blood flow) findings.
  
  
  RESULTS
  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).
  
  
  CONCLUSIONS
  Doppler findings, but not structure, might be related to the clinical result after intratendinous injection treatment of tennis elbow.
authors.affiliation: Sports Medicine Unit, Department of Surgical and Perioperative Science, University of Umeå, 901 87 Umeå, Sweden. eva.zeisig@vll.se
authors.forename: E
authors.initials: E
authors.lastname: Zeisig
authors.forename: M
authors.initials: M
authors.lastname: Fahlström
authors.forename: L
authors.initials: L
authors.lastname: Ohberg
authors.forename: H
authors.initials: H
authors.lastname: Alfredson
mesh_terms: D000328:Adult; D000368:Aged; D002908:Chronic Disease; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007273:Injections, Intramuscular; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000517:prevention & control*; D013716:Tennis Elbow / Q000000981:diagnostic imaging* / Q000188:drug therapy*; D016896:Treatment Outcome; D018615:Ultrasonography, Doppler, Color