Therapeutic Ultrasound and Shockwave Therapy for Tendinopathy: A Narrative Review.
Molly Smallcomb, Sujata Khandare, Meghan E Vidt and 1 others
PMID 35859290WHAT IT FOUND
Therapeutic ultrasound and shockwave therapies for tendinopathy show mixed success, and poor reporting of acoustic dose makes firm recommendations difficult.
Focused shockwave may maintain pain relief longer than low-intensity ultrasound, but the evidence is not strong.
Key findings
01Randomized trials of low-intensity therapeutic ultrasound for tendinopathy consistently showed no benefit over placebo for pain, functional disability, or range of motion.
02Focused extracorporeal shockwave therapy was reported to maintain pain relief longer than low-intensity therapeutic ultrasound.
03Lack of standardized acoustic measurement and reporting makes treatment success rates difficult to interpret.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
This is a narrative review, so it does not describe a systematic search, study selection, or quality appraisal. The studies use very different ultrasound pressures, frequencies, pulse modes, treatment durations, and follow-up times, so direct comparison is difficult. Many studies do not report the full acoustic pressure field or confirm device calibration, so the dose delivered to the tendon is often unclear. Placebo control is difficult for shockwave therapy because pain and treatment time differ between real and sham groups. Some positive clinical findings come from small trials with high dropout rates or no placebo comparison. Much of the mechanistic evidence comes from animal models, and the review says translation to humans is inconsistent. The review does not provide enough evidence to make specific recommendations for particular tendinopathies.
Declared interests
The supplied metadata lists U.S. government and NIH extramural research support. No separate conflicts-of-interest or author disclosure statement appears in the article text.
The easy way to misread this
Do not conclude that therapeutic ultrasound or shockwave therapy reliably treats tendinopathy. The review reports mixed success, with many trials showing no benefit over placebo and no strong recommendation for any specific dose or tendon.