Which of the following serum laboratory results is most concerning to a nurse who is...

For a patient with a Stage III pressure ulcer, a serum albumin level of 2.1 mg/dL is most concerning because it indicates severe hypoalbuminemia, which is associated with poor nutritional status and delayed wound healing. Adequate nutrition, particularly protein intake, is crucial for wound healing. The other lab results, while not ideal, are less immediately critical in the context of pressure ulcer healing. References: = CCRN Exam Handbook, AACN Adult CCRN Certification Review Course