Correct Answer: B

Rationale: The correct answer is B: International normalized ratio (INR). When a client is on warfarin therapy, the INR is monitored regularly to assess the anticoagulant effects of the medication. A therapeutic INR range for most indications is between 2.0 to 3.0. Choices A, C, and D are not typically used to monitor the effect of warfarin. Platelet count assesses the number of platelets in the blood, PT measures the clotting time of plasma, and PTT evaluates the intrinsic pathway of coagulation.

Correct Answer: B

Rationale: The correct answer is B because spironolactone is a potassium-sparing diuretic, which means it helps the body retain potassium. Instructing the client to avoid foods high in potassium helps prevent hyperkalemia, a potential side effect of spironolactone. Choice A is incorrect because taking spironolactone with a potassium supplement can increase the risk of hyperkalemia. Choice C is not directly related to spironolactone use. Choice D is also incorrect as spironolactone does not need to be taken on an empty stomach.

Correct Answer: C

Rationale: In clients with Cushing's syndrome, the nurse should expect hyperkalemia. Cushing's syndrome is characterized by excess cortisol levels, which can lead to potassium retention and result in hyperkalemia. Choices A, B, and D are incorrect. Hypotension is not typically associated with Cushing's syndrome; instead, hypertension is more common due to the effects of cortisol. Weight gain, rather than weight loss, is a common symptom of Cushing's syndrome. Hypercalcemia is not a typical finding in Cushing's syndrome; instead, hypocalcemia may occur due to increased urinary calcium excretion.

Correct Answer: D

Rationale: A blood glucose level of 45 mg/dL is below the normal range for a newborn and indicates hypoglycemia, which can lead to serious complications if left untreated. Therefore, this finding should be reported to the provider immediately. Choices A, B, and C are within normal ranges for a newborn and do not require immediate reporting. A heart rate of 140/min, a bulging anterior fontanel, and a respiratory rate of 50/min are all common findings in a newborn and do not raise immediate concerns.

Correct Answer: C

Rationale: The correct answer is C. Clients taking clopidogrel should take the medication with a full glass of water to prevent gastrointestinal irritation. Choice A is incorrect because there is no specific recommendation to avoid foods high in potassium with clopidogrel. Choice B is unrelated to the medication's administration. Choice D is a duplication of choice C, providing no additional information.