Correct Answer: C

Rationale: The correct answer is C, Psoriasis. Psoriasis commonly presents with well-circumscribed, silvery scales and plaques, typically found on extensor surfaces like elbows and knees. Tinea corporis (A) presents as a circular rash, herpes zoster (B) presents as a painful rash following a dermatomal pattern, and drug reactions (D) have variable presentations not specific to elbows and knees with silvery scales and plaques.

Correct Answer: A

Rationale: The correct answer is A: Serum potassium level. When a client with chronic kidney disease (CKD) is receiving erythropoietin therapy, the nurse should closely monitor the serum potassium level. Erythropoietin therapy can stimulate red blood cell production, leading to an increased demand for potassium. This increases the risk of hyperkalemia, making it crucial to monitor potassium levels closely. Choices B, C, and D are incorrect because erythropoietin therapy primarily affects red blood cell production, not hemoglobin, white blood cell count, or serum calcium levels.

Correct Answer: B

Rationale: The correct answer is B: Serum creatinine. Aminoglycosides, such as gentamicin, are known to cause nephrotoxicity, which can lead to kidney damage. Monitoring serum creatinine levels is crucial in assessing renal function and detecting any potential kidney problems early. Choices A, C, and D are incorrect because urinalysis primarily assesses urine composition, serum osmolarity measures the concentration of solutes in the blood, and liver enzymes are not directly impacted by aminoglycoside antibiotics like gentamicin.

Correct Answer: A

Rationale: The correct action is to notify the healthcare provider of the client's refusal. It is important for the healthcare provider to be informed so that they can decide on the next steps in the client's treatment, which may involve exploring alternative options or strategies. Attempting to convince the client to take the medication may not be effective, especially if the client is refusing. Administering the medication without the client's consent would violate the client's autonomy and rights. Simply documenting the refusal without further action may not address the client's treatment needs.

Correct Answer: A

Rationale: The correct answer is A: Appearance of wound. Elevated WBC and ESR levels suggest a possible infection in the client with an open fracture. Assessing the wound's appearance is crucial to evaluate for signs of infection, such as redness, warmth, swelling, or drainage. By assessing the wound first, the nurse can provide important information to the healthcare provider regarding the potential infection, which may require immediate intervention. Choices B, C, and D are important assessments in caring for a client with an open fracture; however, in this scenario, the priority is to assess the wound for signs of infection due to the elevated WBC and ESR levels.