Background Pressure ulcers, which are a localised injury to the skin, or underlying tissue, or both, occur when people are unable to reposition themselves to relieve pressure on bony prominences. Pressure ulcers are o en di icult to heal, painful, expensive to manage and have a negative impact on quality of life. While individual patient safety and quality care stem largely from direct healthcare practitionerpatient interactions, each practitioner-patient wound-care contact may be constrained or enhanced by healthcare organisation of services. Research is needed to demonstrate clearly the e ect of di erent provider-orientated approaches to pressure ulcer prevention and treatment. Objectives To assess the e ects of di erent provider-orientated interventions targeted at the organisation of health services, on the prevention and treatment of pressure ulcers. Search methods In April 2018 we searched the Cochrane Wounds Specialised Register; the Cochrane Central Register of Controlled Trials (CENTRAL); Ovid MEDLINE (including In-Process & Other Non-Indexed Citations); Ovid Embase and EBSCO CINAHL Plus. We also searched three clinical trials registries for ongoing and unpublished studies, and scanned reference lists of relevant included studies as well as reviews, meta-analyses and health technology reports to identify additional studies. There were no restrictions with respect to language, date of publication or study setting. Selection criteria Randomised controlled trials (RCTs), cluster-RCTs, non-RCTs, controlled before-and-a er studies and interrupted time series, which enrolled people at risk of, or people with existing pressure ulcers, were eligible for inclusion in the review. Data collection and analysis Two review authors independently performed study selection, risk of bias assessment, data extraction and GRADE assessment of the certainty of evidence. Organisation of health services for preventing and treating pressure ulcers (Review)