Correct Answer: D

Rationale: Administering calcium gluconate IV is the correct action when a client displays toxicity from magnesium sulfate. Calcium gluconate is used as the antidote for magnesium sulfate toxicity as it counteracts the effects. Positioning the client supine (Choice A) is not the immediate action needed. Administering dextrose 5% in water (Choice B) is not indicated for magnesium sulfate toxicity. Administering methylergonovine IM (Choice C) is used in postpartum hemorrhage, not for magnesium sulfate toxicity.

Correct Answer: D

Rationale: The correct answer is to administer the medication (Choice D) since the lithium level of 0.8 mEq/L falls within the therapeutic range of 0.6-1.2 mEq/L. Withholding the next dose (Choice A) or increasing the dosage (Choice B) is not necessary as the current level is appropriate. Discontinuing the medication (Choice C) is not warranted based on the given lithium level. It is crucial to maintain therapeutic levels to ensure the medication's effectiveness without causing toxicity.

Correct Answer: D

Rationale: The correct action the nurse should take when preparing to administer an IV medication to a client with a latex allergy is to administer the medication through a latex-free IV port. This measure helps prevent allergic reactions in clients with a known latex allergy. Placing the client in a supine position (Choice A) is not directly related to preventing a latex allergy reaction. Using non-latex gloves (Choice B) is important for protecting the nurse or caregiver from latex exposure but does not prevent the client's allergic reaction. While using latex-free syringes (Choice C) is a good practice, ensuring the IV port is latex-free is more crucial in preventing an allergic response in the client.

Correct Answer: A

Rationale: Nuchal rigidity is a classic sign of bacterial meningitis and indicates inflammation of the meninges. It is characterized by neck stiffness and pain upon neck flexion. Flaccid paralysis (Choice B) is not typically associated with bacterial meningitis but rather conditions like Guillain-Barre syndrome. Bradycardia (Choice C) and hypothermia (Choice D) are not commonly seen in bacterial meningitis; instead, patients may present with fever, tachycardia, and signs of systemic inflammation.

Correct Answer: B

Rationale: Thrombophlebitis is a contraindication to combination oral contraceptives due to the increased risk of thromboembolic events. Hyperthyroidism, diverticulosis, and hypocalcemia are not contraindications to combination oral contraceptives. Hyperthyroidism may affect thyroid hormone levels but does not directly contraindicate oral contraceptives. Diverticulosis is a condition related to the digestive system and does not impact the use of oral contraceptives. Hypocalcemia, a low calcium level in the blood, is not a contraindication for oral contraceptives.