Correct Answer: A

Rationale: In a client with a sodium level of 125 mEq/L (hyponatremia), the nurse should administer 0.9% sodium chloride IV to help increase sodium levels. Choice B, administering a hypotonic IV solution, would further decrease the sodium level. Choice C, encouraging oral fluid intake, is contraindicated as it can dilute the sodium concentration further. Choice D, restricting oral fluid intake, could worsen the client's condition by leading to dehydration and further electrolyte imbalances.

Correct Answer: C

Rationale: The correct answer is C: Thyroid-stimulating hormone (TSH). Monitoring TSH levels is crucial to assess the effectiveness of levothyroxine in clients with hypothyroidism. TSH is produced by the pituitary gland and stimulates the thyroid gland to produce thyroid hormones. In hypothyroidism, where the thyroid gland is underactive, administering levothyroxine helps to normalize thyroid hormone levels. Monitoring TSH levels allows the healthcare provider to adjust the levothyroxine dosage to ensure that thyroid hormone levels are within the therapeutic range. Choices A, B, and D (Calcium, Sodium, and Magnesium) are not directly related to assessing the effectiveness of levothyroxine therapy in hypothyroidism and would not provide relevant information regarding the medication's efficacy.

Correct Answer: A

Rationale: The correct answer is A: Positive Trousseau's sign. When a patient receiving furosemide is developing hypokalemia, they may exhibit a positive Trousseau's sign, an indication of low potassium levels. This sign is elicited by inflating a blood pressure cuff above systolic pressure for a few minutes, resulting in carpal spasm. Choices B, C, and D are incorrect. Hyperactive reflexes are associated with hyperkalemia, not hypokalemia. Hypoactive bowel sounds are not specifically related to hypokalemia. Decreased deep-tendon reflexes are not typically seen in hypokalemia.

Correct Answer: A

Rationale: The correct answer is to administer the feeding over 30 minutes. This slow administration helps prevent complications like nausea. Placing the child in a supine position after the feeding can increase the risk of aspiration, making choice B incorrect. Changing the feeding bag and tubing every 3 days is important for infection control and hygiene but is not directly related to the administration process, making choice C incorrect. Warming the formula in the microwave is not recommended as it can create hot spots that may burn the child's mouth or esophagus, so choice D is incorrect.

Correct Answer: D

Rationale: Abdominal distention and rigidity may indicate a postoperative complication, such as bowel obstruction or peritonitis, and should be reported to the provider. While monitoring urine output, heart rate, and wound drainage are essential postoperative assessments, they are not as concerning as abdominal distention and rigidity, which could signal a more urgent issue requiring immediate attention.