A nurse is caring for a client who has chronic hypothyroidism. For which of the following conditions should the nurse monitor?

A. Administering aspirin for hyperthermia is not a standard intervention for hyperthyroidism. Hyperthermia can occur in severe cases of hyperthyroidism, but the primary intervention is to address the underlying thyroid dysfunction and provide supportive care.

B. Keeping the client NPO (nothing by mouth) is not directly related to preventing a thyroid crisis in hyperthyroidism. It may be necessary for certain pre-operative preparations or if the client is undergoing specific procedures, but it does not address the prevention of a thyroid crisis.

C. While monitoring for signs of hypocalcemia is important in some cases of thyroid dysfunction, it is not the primary action to prevent a thyroid crisis. In hyperthyroidism, the focus is on managing excessive thyroid hormone levels.

D. Correct. Providing a quiet, low-stimulus environment is a crucial nursing intervention for clients with hyperthyroidism. They can be highly sensitive to external stimuli due to their increased metabolic rate. A calm environment helps reduce stress and the risk of exacerbating symptoms, potentially preventing a thyroid crisis.

A. Incorrect. Withholding insulin during illness is not recommended. Clients with type 1 diabetes should continue to take their prescribed insulin even when they are ill. Insulin is necessary to regulate blood glucose levels, and illness can increase the body's demand for insulin.

B. Incorrect. Drinking calorie-free liquids is important to prevent dehydration during illness, but specific fluid amounts should be individualized based on the client's needs and healthcare provider's recommendations. The given volume is not a universally applicable guideline.

C. Incorrect. Testing blood glucose levels every 8 hours may not be frequent enough during illness. Blood glucose should be monitored more frequently to closely track changes in response to illness and adjust insulin doses accordingly.

D. Correct. Checking urine for ketones when blood glucose levels exceed 240 mg/dL is an important guideline during illness. Elevated blood glucose levels can lead to the production of ketones, and checking for ketones in the urine helps identify the early signs of diabetic ketoacidosis (DKA). If ketones are present, the client should follow a specific plan of action as outlined by their healthcare provider, which may include adjusting insulin doses or seeking medical attention.