A nurse is assessing a client who has a positive Trousseau's sign. Which of the following medications should the nurse plan to administer?

Choice A rationale Sodium bicarbonate is used to treat metabolic acidosis or certain drug overdoses, but it does not directly address hypocalcemia, which is the underlying cause of a positive Trousseau's sign. Its primary action is to increase systemic pH, not calcium levels. Choice B rationale Magnesium sulfate is administered for magnesium deficiencies, pre-eclampsia, or certain arrhythmias. While magnesium deficiency can sometimes exacerbate hypocalcemia, it is not the primary treatment for Trousseau's sign, which specifically indicates low calcium. Choice C rationale Calcium gluconate is the appropriate medication to administer for a positive Trousseau's sign, as this sign indicates hypocalcemia (low serum calcium levels). Calcium gluconate directly replenishes calcium, correcting the neuromuscular excitability caused by insufficient extracellular calcium. Choice D rationale Potassium chloride is given to treat hypokalemia (low potassium levels). While electrolyte imbalances can be complex, a positive Trousseau's sign is specifically indicative of hypocalcemia, not hypokalemia, and potassium administration would not resolve the underlying issue.