When instructed to elevate a patient's limb that is in a cast, what would be the correct action for the CNA?

Elevating a patient's limb that is in a cast is crucial for reducing swelling and promoting proper circulation. The correct action involves raising the limb above the level of the patient's heart. This position enhances venous return, alleviates pressure on the affected area, and helps to minimize edema. When a limb is elevated adequately, it reduces the gravitational pull on the fluid accumulation, allowing the body to efficiently drain excess fluid from the site, which is particularly important post-injury or surgery.

Maintaining the limb at heart level ensures that blood flow is optimal and can also enhance healing by providing better oxygenation to the tissues. Thus, the practice of elevating the limb correctly fosters an environment conducive to recovery, making this the appropriate response in the situation described.