Correct Answer: A

Rationale: Taking omeprazole 30 minutes before breakfast optimizes its acid-suppressing effect by aligning with the body's natural acid production cycle, improving GERD symptom control.
Choice B is incorrect because omeprazole may take several days to provide significant relief, not immediate relief.
Choice C is incorrect because, while swallowing the capsule whole is correct for delayed-release formulations, the timing (before meals) is more critical to emphasize for efficacy.
Choice D is incorrect because taking omeprazole with an antacid is not recommended, as it may reduce the drug's effectiveness; antacids are used for immediate relief, not in combination with proton pump inhibitors.

Correct Answer: C

Rationale:
Choice A is wrong because the nurse should not hold the hand flat to perform percussions on the child. Percussions are rhythmic clapping on the chest wall to loosen the mucus. The nurse should use a cupped hand to create a small air pocket that enhances the vibrations and prevents bruising.
Choice B is wrong because the nurse should not perform the procedure twice a day. The recommended frequency of postural drainage is 3 to 4 times a day, or more if needed, depending on the child's condition and tolerance. This is because postural drainage involves positioning the child in different ways to help drain the mucus from the lungs. If the child has a full stomach, this can cause nausea, vomiting, or aspiration.
Therefore, the nurse should perform the procedure before meals or at least 1 hour after meals.
Choice D is wrong because the nurse should not administer a bronchodilator after the procedure. A bronchodilator is a medication that relaxes and widens the airways, making it easier to breathe. The nurse should administer a bronchodilator before the procedure to enhance the effectiveness of postural drainage.

Correct Answer: D

Rationale: Elevating the affected arm on a pillow promotes lymphatic drainage, reduces swelling, and enhances comfort after a mastectomy, where lymph nodes may have been removed.
Choice A is incorrect because, while deep-breathing exercises are beneficial for lung expansion, they do not directly address post-mastectomy comfort related to the surgical site.
Choice B is incorrect because a supine position with the head flat may increase swelling and discomfort; a semi-Fowler's position is preferred.
Choice C is incorrect because a warm compress is not recommended, as it may increase swelling or risk infection; cold packs may be used if prescribed.

Correct Answer: B

Rationale: Monitoring liver function tests is essential for clients taking phenytoin, an anticonvulsant that can cause hepatotoxicity, leading to elevated liver enzymes or liver damage.
Choice A is incorrect because phenytoin is not commonly associated with thrombocytopenia; blood dyscrasias are rare but possible.
Choice C is incorrect because blood urea nitrogen is not directly affected by phenytoin; it is more relevant for drugs affecting renal function.
Choice D is incorrect because phenytoin can cause hyponatremia, but it is less critical than liver function monitoring, as hepatotoxicity is a more significant risk.

Correct Answer: B

Rationale: Hypocalcemia is a potential complication after thyroidectomy due to accidental removal or damage to the parathyroid glands, which regulate calcium; symptoms like tetany or numbness should be monitored.
Choice A is incorrect because tachycardia is not a primary postoperative complication; it may occur with pain or hyperthyroidism but is less specific.
Choice C is incorrect because a fever of 37.5°C is not significant and may be a normal postoperative response, not a complication unless persistent.
Choice D is incorrect because increased appetite is not a typical postoperative complication; hypothyroidism may cause decreased appetite.