Which of the following is a critical precaution for a nurse caring for a patient with DiGeorge's syndrome?

The critical precaution for a nurse caring for a patient with DiGeorge's syndrome is serum calcium. DiGeorge's syndrome is a genetic disorder that results in the underdevelopment of the thymus gland and parathyroid glands. The parathyroid glands are crucial for regulating calcium levels in the body. Therefore, patients with DiGeorge's syndrome may experience hypoparathyroidism, leading to low calcium levels (hypocalcemia). Monitoring serum calcium is vital to prevent complications associated with low calcium, such as muscle spasms, seizures, and cardiac issues.

Maintaining appropriate calcium levels helps ensure the overall stability of the patient's health and aids in preventing acute medical emergencies related to hypocalcemia. Regular calcium level checks and potential supplementation may be necessary for optimal patient management in those with this syndrome.