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Pulsed ultrasound treatment of the painful shoulder a randomized, double-blind, placebo-controlled study
Nykanen M
Scandinavian Journal of Rehabilitation Medicine 1995 Jun;27(2):105-108
clinical trial
8/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: Yes; Blind therapists: Yes; Blind assessors: Yes; Adequate follow-up: Yes; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

To study the effect of pulsed ultrasound in shoulder pains, 35 patients were treated with pulsed ultrasound and 37 patients with placebo ultrasound in a double-blind design. The therapy was given during inpatient rehabilitation, 10 to 12 treatments over 3 to 4 weeks. Treatment time was 10 minutes, frequency 1.0mHz, on-off ratio 1:4 and intensity 1.0w/cm2. Follow-ups were done after 4 to 12 months. No differences (p < 0.05) in outcomes were found between the groups after the treatment period or at follow-ups. These results discourage the adding of pulsed ultrasound therapy with the variables used to the conservative treatment of the painful shoulder.

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