How should an orthopedic nurse educate a patient about the care of an extremity in a cast?

The proper care of an extremity in a cast is vital for promoting healing and preventing complications. Keeping the cast dry is essential because moisture can weaken the material and lead to skin irritation or infections. Elevating the limb helps reduce swelling by promoting venous return, which is important to avoid complications such as compartment syndrome. Reporting any discomfort or unusual odors is crucial as these could indicate problems like cast tightness or infection, which require immediate medical attention. Therefore, this approach provides clear and practical guidance that supports the patient's recovery while ensuring their safety.

The other choices involve actions that could compromise the effectiveness and integrity of the cast, ultimately leading to complications, which is why they are not appropriate for patient education in this context.