Correct Answer: C

Rationale: A magnesium level of 1.0 mg/dL can cause a depressed ST segment on the ECG. Magnesium deficiency commonly leads to ST segment depression on an electrocardiogram. Prominent U waves are associated with hypokalemia, prolonged PR interval is seen in conditions like first-degree heart block, and widened QRS complexes are typically related to conditions affecting the conduction system of the heart, such as bundle branch blocks.

Correct Answer: D

Rationale: A new nurse graduate should consider applying for a nurse manager position when they have developed both leadership and clinical expertise. This ensures that they are well-prepared for the responsibilities of the role. Choice A is incorrect because being comfortable in the current position does not necessarily equate to having the required skills for a nurse manager role. Choice B is incorrect as mentoring other new nurses, while valuable, may not directly align with the skills needed for a managerial position. Choice C is incorrect as applying for a nurse manager position solely because a position is available does not guarantee readiness for the role.

Correct Answer: A

Rationale: The correct answer is A: Lactic acidosis. Metformin, a common medication for type 2 diabetes mellitus, can lead to lactic acidosis, particularly in individuals with renal impairment or other predisposing factors. Monitoring for signs and symptoms of lactic acidosis, such as muscle pain, weakness, trouble breathing, dizziness, and slow or irregular heartbeat, is crucial when a client is taking metformin. Choice B, hypokalemia, is not a common side effect of metformin. Choice C, hyperglycemia, is contrary to the intended effect of metformin, which is to lower blood glucose levels. Choice D, weight gain, is not typically associated with metformin use; in fact, metformin may even contribute to weight loss in some individuals.

Correct Answer: B

Rationale: The correct intervention for a client with SIADH is to restrict fluid intake. SIADH leads to water retention and dilution of sodium levels in the body, resulting in hyponatremia. Restricting fluid intake helps prevent further dilutional hyponatremia. Encouraging oral fluids (Choice A) would exacerbate the condition by further increasing fluid retention. Administering potassium supplements (Choice C) is not directly related to managing SIADH. Increasing sodium intake (Choice D) is contraindicated because it can worsen hyponatremia in clients with SIADH.

Correct Answer: C

Rationale: The correct answer is C. Glycosylated hemoglobin (HbA1c) reflects average blood glucose levels over the past 3 months. This test is used to assess long-term blood sugar control in individuals with diabetes. Choice A is incorrect because fasting is not required for an HbA1c test. Choice B is judgmental and not supported by the information provided. Choice D is not the most accurate statement to make based on the HbA1c result; adjusting insulin would depend on a more comprehensive assessment of the client's overall diabetes management.