Analgesic effect of extracorporeal shock-wave therapy on chronic tennis elbow

We report a controlled, prospective study to investigate the effect of treatment by low-energy extracorporeal shock waves on pain in tennis elbow We assigned at random 100 patients who had had symptoms for more than 12 months to two groups to receive low-energy shock-wave therapy, Group I received a total of 3000 impulses of 0.08 mJ/mm(2) and group II, the control group, 30 impulses. The patients were reviewed after 3, 6 and 24 weeks, There was significant alleviation of pain and improvement of function after treatment in group I in which there was a good or excellent outcome in 48% and an acceptable result in 42% at the final review, compared with 6% and 24%, respectively, in group II.