A nurse is reviewing guidelines to prevent DKA during periods of illness with a client who has type 1 diabetes mellitus. Which of the following instructions should the nurse include in the teaching?

A. Flaccid muscles are associated with conditions like hypokalemia, not hypoparathyroidism. In hypoparathyroidism, there is a deficiency of parathyroid hormone (PTH), which leads to low calcium levels and can result in muscle spasms and tetany, not flaccid muscles.

B. While anorexia can occur in clients with various health conditions, it is not a specific finding associated with hypoparathyroidism.

C. Correct. Hypoparathyroidism is characterized by low levels of parathyroid hormone (PTH), which leads to low calcium levels in the blood. This can cause symptoms such as numbness, tingling, and muscle cramps, especially in the extremities.

D. A positive Chvostek's sign is associated with hypocalcemia, which can be caused by hypoparathyroidism. Therefore, a negative Chvostek's sign would not be an expected finding in a client with hypoparathyroidism.

- Choice A Rationale: Placing the head of the bed in the flat position is not recommended as it can increase the risk of airway obstruction and reduce venous drainage from the head, which is especially critical after thyroid surgery.
- Choice B Rationale: While deep breathing is important postoperatively, it is not specific to thyroidectomy care and should be done more frequently than every 4 hours to ensure adequate ventilation and prevent atelectasis.
- Choice C Rationale: Hyperextending the client's neck can be harmful post-thyroidectomy as it may put stress on the surgical site, potentially leading to dehiscence or damage to the area.
- Choice D Rationale: Checking the client's voice every 2 hours is essential after a thyroidectomy because vocal cord paralysis can be an indicator of recurrent laryngeal nerve damage, which is a potential complication of the surgery. Monitoring the voice allows for early detection and intervention.