Correct Answer: B

Rationale: The correct answer is B: Monitor serum creatinine. Serum creatinine is a key indicator of renal function as it reflects the glomerular filtration rate. An increase in serum creatinine levels indicates impaired kidney function. Checking blood glucose levels (choice A) is not specific to assessing renal function but is used to diagnose diabetes. Monitoring BUN (choice C) is important but not as specific as serum creatinine in assessing renal function. Checking electrolyte levels (choice D) is essential in assessing kidney function but is not as specific as monitoring serum creatinine.

Correct Answer: B

Rationale: Administering lorazepam is the appropriate intervention for a client experiencing acute alcohol withdrawal. Lorazepam helps reduce agitation and prevent complications during this withdrawal phase. Choice A, providing a low-sodium diet, is not directly related to managing alcohol withdrawal symptoms. Choice C, keeping the client in a supine position, is not necessary and may not address the client's withdrawal symptoms. Choice D, placing the client in restraints, should only be considered if the client is at risk of harming themselves or others, but it is not the primary intervention for managing alcohol withdrawal.

Correct Answer: A

Rationale: The correct answer is A: Monitor INR. INR (International Normalized Ratio) is crucial to monitor in patients receiving warfarin therapy. INR measures the blood's ability to clot and is used to ensure that patients are within the therapeutic range for warfarin therapy. This is important to prevent both clotting disorders and bleeding complications. Monitoring potassium levels (choice B) is not directly related to warfarin therapy. Platelet count (choice C) and sodium levels (choice D) are important parameters but are not as critical to monitor specifically for patients on warfarin therapy.

Correct Answer: C

Rationale: A sodium level of 125 mEq/L indicates hyponatremia, which can lead to hypotension. Hyponatremia is associated with signs such as confusion and weakness, rather than increased appetite, dry mucous membranes, or hyperreflexia. Therefore, the nurse should expect hypotension as a finding in a client with a sodium level of 125 mEq/L.

Correct Answer: B

Rationale: The correct answer is to move the probe site every 3 hours. This action helps prevent skin breakdown and ensures accurate readings. Placing the infant under a radiant warmer (Choice A) is not necessary for pulse oximetry monitoring. Heating the skin before placing the probe (Choice C) can potentially cause burns in infants. Placing a sensor on the index finger (Choice D) is not the standard practice for continuous pulse oximetry in infants.