A staff nurse is teaching a client who has Addison's disease about the disease process. The client asks the nurse what causes Addison's disease. Which of the following responses should the nurse make?

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.

A. Correct. Chvostek's sign is a clinical sign of hypocalcemia. It is elicited by tapping on the facial nerve, just anterior to the ear, and observing for facial twitching or spasm.

B. Incorrect. Kernig's sign is a test for assessing meningitis and involves flexing the hip and knee at 90-degree angles and then extending the knee. This test is not relevant to the client's reported symptoms.

C. Incorrect. Brudzinski's sign is another test for assessing meningitis. It involves flexing the neck forward and observing for involuntary flexion of the hips and knees. This test is not relevant to the client's reported symptoms.

D. Incorrect. Babinski's sign is used to assess upper motor neuron lesions. It involves stimulating the sole of the foot, and in a positive response, the big toe extends upward. This test is not relevant to the client's reported symptoms.