A nurse is assessing a client who has a pressure ulcer. The nurse should recognize which of the following findings is a manifestation of a stage 3 pressure ulcer?

The correct answer is B: Necrotic subcutaneous tissue. In a stage 3 pressure ulcer, there is full-thickness skin loss involving damage or necrosis of subcutaneous tissue. This stage typically presents as a deep crater-like wound with visible fat tissue. The presence of necrotic subcutaneous tissue indicates severe tissue damage, distinguishing it from other stages. Choices A, C, and D do not align with the characteristics of a stage 3 pressure ulcer, as they describe findings associated with different stages of pressure ulcers. Blood-filled blisters are more indicative of a stage 2 pressure ulcer, while exposed bone would be seen in a stage 4 ulcer.