Final answer:
The shallow, open ulcer with partial thickness skin loss on the sacrum is classified as a Stage II pressure ulcer, based on guidelines from the National Pressure Ulcer Advisory Panel.
Step-by-step explanation:
The ulcer you're describing, with partial-thickness skin loss and an open wound on the sacrum, is most accurately classified as a Stage II ulcer, according to the National Pressure Ulcer Advisory Panel (NPUAP). Stage II pressure ulcers are characterized by shallow open ulcers with a red-pink wound bed, without slough. Partial thickness loss of dermis presenting as a shallow open ulcer with a red pink wound bed is another key indicator of a Stage II pressure ulcer.
Learn more about Pressure Ulcer