A nurse is assisting with the care of a client who has hypocalcemia. For which of the following signs should the nurse monitor?

A. Kernig’s sign is used to assess for meningeal irritation, such as in meningitis, and is not related to hypocalcemia. B. Brudzinski’s sign also indicates meningeal irritation and is unrelated to calcium levels. C. Cullen’s sign indicates periumbilical bruising, often associated with intra-abdominal bleeding or pancreatitis, not hypocalcemia. D. Chvostek’s sign is a classic indicator of hypocalcemia. Tapping the facial nerve just below and in front of the ear causes twitching of the facial muscles when calcium levels are low, reflecting increased neuromuscular excitability.