OBJECTIVE: to evaluate the effectiveness of hydrocolloids in the healing of pressure ulcers in adult and older adult patients. METHOD: systematic review with meta-analysis. based on the recommendations of the Cochrane Handbook. The search was undertaken in the databases: Medical Literature Analysis and Retrieval System Online. https://www.diegojavierfares.com/mega-pick-SA439-EF75-5-x-7-Embroidery-Machine-Hoop-mega-pick/