A nurse is providing instruction to a new nurse about caring for clients who are receiving diuretic therapy to treat heart failure. The nurse should explain that which of the following medications puts clients at risk for both hyperkalemia and hyponatremia?

A) Exposed bone: Exposed bone is a manifestation of a stage 4 pressure ulcer, where full-thickness skin loss occurs, exposing muscle, tendon, or bone. In stage 3 pressure ulcers, the skin loss extends into the subcutaneous tissue, but it does not reach the level of exposing underlying structures like bone.

B) Blood-filled blisters: Blood-filled blisters can occur in various stages of pressure ulcers, but they are not specific to stage 3. They may be present in stage 1 or stage 2 pressure ulcers as well.

C) Necrotic subcutaneous tissue: This is the correct manifestation of a stage 3 pressure ulcer. Stage 3 pressure ulcers involve full-thickness skin loss with visible necrosis or damage to the subcutaneous tissue. The ulcer may appear as a deep crater with or without undermining of adjacent tissue.

D) Partial-thickness skin loss: Partial-thickness skin loss is characteristic of stage 2 pressure ulcers, where the ulcer extends through the epidermis and into the dermis but does not involve deeper tissue layers like the subcutaneous tissue.

A. Collect a urine sample from the client: While collecting a urine sample may be necessary for further assessment, it is not the priority in this situation. The client's symptoms of lower back pain, feeling chilled, and itching suggest a potential transfusion reaction, which requires immediate attention to ensure the client's safety. Therefore, collecting a urine sample is not the most appropriate initial action.

B. Return the platelet bag and tubing to the blood bank: Returning the platelet bag and tubing to the blood bank may be necessary after stopping the infusion, but it is not the first action the nurse should take. Stopping the infusion and assessing the client's condition are the immediate priorities to address the potential transfusion reaction.

C. Notify the provider: While it is important to notify the provider about the client's symptoms and the suspected transfusion reaction, this action should follow after stopping the infusion and assessing the client's condition. Immediate intervention to ensure the client's safety takes precedence over contacting the provider.

D. Stop the infusion: This is the correct action. The client's symptoms of lower back pain, feeling chilled, and itching are indicative of a potential transfusion reaction, such as febrile non-hemolytic transfusion reaction or allergic reaction. The immediate priority is to stop the infusion to prevent further administration of platelets and assess the client's condition. This action takes precedence over other interventions as addressing the client's safety and well-being is paramount in the event of a transfusion reaction.