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

A) "The client should use a hair dryer on a warm setting to relieve itching inside the cast.": Using a hair dryer on a warm setting to relieve itching inside the cast is not recommended because it could potentially lead to burns or skin irritation. The client should avoid inserting objects inside the cast to scratch, as this could damage the skin or cause an infection. B) "The client can shower with the cast after 24 hr.": A plaster cast is not waterproof, and the client should avoid getting it wet. Although the cast may feel dry on the outside after 24 hours, it typically takes about 48 hours or longer for a plaster cast to fully dry and harden. Showering with a plaster cast is not safe, as moisture could cause skin irritation or lead to the development of sores or infection. C) "The client’s extremity should be elevated after the cast is applied.": Elevating the extremity after a cast is applied is a key teaching point to help reduce swelling and improve circulation. This is especially important during the first 24 to 48 hours after cast application. Elevation helps to prevent or manage swelling, which can be a common complication after an injury and cast application. D) "The client should keep the cast covered until it is dry.": While it is important to keep a cast clean and dry during the drying process, the cast should not be covered with plastic or other materials that could trap moisture. The cast needs air circulation to dry properly, and covering it could lead to the cast becoming too moist, increasing the risk of skin issues or infection.