Effectiveness of high frequency ultrasound on pressure ulcer: A systematic review protocol of randomized controlled trial.

Background: This study aims to systematically assess the effectiveness of high frequency ultrasound (HFUS) on pressure ulcer (PU).

Methods: In this study, PubMed, EMBASE, Cochrane Library, Web of Science, Chinese Biomedical Literature Database, and China National Knowledge Infrastructure will be searched from inception to the present without any language limitations. The primary outcomes include change in ulcer area, and time complete healing.