Registered Nurses' Association of Ontario

Definition of Pressure Injury

The National Pressure Ulcer Advisory Panel (NPUAP) defines a pressure injury as “localized damage to the skin and/or underlying soft tissue usually over a bony prominence or related to a medical or other device. The injury can present as intact skin or an open ulcer and may be painful. The injury occurs as a result of intense and/or prolonged pressure or pressure in combination with shear. The tolerance of soft tissue for pressure and shear may also be affected by microclimate, nutrition, perfusion, co-morbidities and condition of the soft tissue.”

Clinical Management
Assessment and Management of Pressure Injuries for the Interprofessional Team, Third Edition
Background Information