What is a 'cast' used for in medical treatment?

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A cast is used primarily to protect a broken bone during the healing process. When a bone fractures, the surrounding tissues often become vulnerable, and proper stabilization is crucial to ensure the bone heals correctly. A cast serves several important functions; it immobilizes the affected area, prevents further injury, and maintains the alignment of the bone. This immobilization allows the body to focus on the healing process without the risk of the bone moving out of place or sustaining additional damage.

In contrast, other options are not typical uses for a cast. Healing a cut might require bandages or sutures, rather than the rigid structure of a cast. For a sprain, while immobilization might be necessary, other methods like elastic bandages or splints that allow some movement might be more appropriate. Reduction of swelling is usually treated with methods such as compression, elevation, and ice rather than a cast, which does not have the flexibility to accommodate swelling. Thus, using a cast specifically addresses the needs associated with broken bones.

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