title: Shock wave therapy for chronic Achilles tendon pain: a randomized placebo-controlled trial.
abstract: Shock wave therapy has been used for treatment of several soft tissue disorders that are characterized by chronic pain. We sought to determine if shock wave therapy reduces chronic Achilles tendon pain. Forty-nine patients were enrolled in a double-blind randomized placebo-controlled trial. Each patient was treated once a month for 3 months. The primary outcome measure was a reduction in Achilles tendon pain during walking. At the end of the trial, we found no difference in pain relief between the shock wave therapy group and the control group. There were two patients (62 years and 65 years) with tendon ruptures in the treatment group, suggesting caution when treating older patients. These results provide no support for the use of shock wave therapy for treatment of patients with chronic Achilles tendon pain. However, the confidence intervals include the potential for a clinically relevant treatment effect.
  
  
  METHODS
  Therapeutic study, Level I (systematic review of Level I RCTs-and study results were homogenous). See the Guidelines for Authors for a complete description of levels of evidence.
authors.affiliation: The Norfolk and Norwich University Hospital, Norwich, UK. mattcosta@hotmail.com
authors.forename: M L
authors.initials: ML
authors.lastname: Costa
authors.forename: L
authors.initials: L
authors.lastname: Shepstone
authors.forename: S T
authors.initials: ST
authors.lastname: Donell
authors.forename: T L
authors.initials: TL
authors.lastname: Thomas
mesh_terms: D000125:Achilles Tendon / Q000293:injuries; D002908:Chronic Disease; D004311:Double-Blind Method; D005260:Female; D019220:High-Energy Shock Waves / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012421:Rupture; D052256:Tendinopathy / Q000628:therapy*; D017211:Treatment Failure