Knowra Pressure ulcer Pressure ulcer A localized injury to skin and underlying tissue caused by sustained pressure or pressure combined with shear. It often develops over bony prominences or beneath medical devices.
Pressure injury staging : A classification system describing the depth and appearance of pressure-related tissue damage. Staging records how far the injury extends, from intact skin changes to deeper tissue loss.
Pressure ulcer prevention : Measures that reduce the likelihood of pressure-related tissue injury. Regular repositioning, skin assessment, and support surfaces target the causes of ulcer formation.
Skin : The body's outer covering, composed of the epidermis, dermis, and associated structures. The skin is the first tissue damaged in many pressure ulcers.
Diabetic foot ulcer : A foot wound associated with diabetes, often involving neuropathy, poor circulation, or both. Its causes and usual locations differ from injuries produced by sustained pressure.
Shear force : A force that makes adjacent layers of tissue slide in different directions. Shear distorts tissue and blood vessels, worsening damage when pressure is present.
Pressure-redistributing mattress : A mattress designed to spread or periodically alter pressure on the body. Support surfaces reduce sustained loading on vulnerable areas.
Subcutaneous tissue : Connective and fat tissue beneath the skin that cushions and insulates the body. Pressure injuries can extend through this layer into deeper structures.
Venous ulcer : A chronic lower-leg wound caused by impaired venous return and elevated venous pressure. Venous hypertension, rather than external loading, drives this wound type.
Tissue ischemia : Inadequate blood supply to tissue, limiting oxygen and nutrient delivery. Sustained loading can restrict local blood flow and trigger ischemic injury.
Repositioning : Changing a person's position to relieve prolonged pressure on body tissues. Turning schedules are used to unload areas at risk of injury.
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