A nurse is reinforcing teaching with a client who is to have a plaster cast applied to his right arm. Which of the following information should the nurse include in the teaching?

A. The client's extremity should be elevated after the cast is applied. Elevating the extremity above heart level for the first 24 to 48 hours reduces swelling and prevents complications such as compartment syndrome. Ice packs can also be applied to minimize edema. B. The client should keep the cast covered until it is dry. Covering a wet plaster cast can trap moisture and delay drying, increasing the risk of weakening the cast and skin irritation. Plaster casts should be left uncovered to allow proper air drying. C. The client can shower with the cast after 24 hr. Plaster casts are not waterproof and should be kept dry at all times. If exposed to water, they can lose their shape and strength, potentially leading to improper healing. A plastic covering should be used when bathing. D. The client should use a hair dryer on a warm setting to relieve itching inside the cast. Direct heat can weaken the plaster and cause burns. Instead, clients should use a cool hair dryer setting or tap lightly on the cast to manage itching without compromising its integrity.