As a result of which of the following causes do pressure ulcers primarily form?
a. Nitrogen buildup in the underlying tissues
b. Prolonged illness or disease
c. Pressure in combination with shear and/or friction
d. Poor nutrition
C
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A Nitrogen buildup is not the primary cause of pressure ulcer formation.
B Prolonged illness or disease may place a patient at risk for pressure ulcer development, but it is not the primary cause of pressure ulcers.
C A pressure ulcer is a localized injury to the skin and other underlying tissue, usually over a body prominence, as a result of pressure or pressure in combination with shear and/or friction.
D Poor nutrition may place a patient at risk for pressure ulcer development, but it is not the primary cause of pressure ulcers.
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