**Question:** Splint used for the condition shown below:

A. A broken arm in a cast
B. A sprained ankle
C. A dislocated shoulder
D. A fractured wrist

**Core Concept:** Splints are medical devices used to immobilize and protect a specific body part affected by injury or disease, aiding in the healing process and preventing further damage.

**Why the Correct Answer is Right:** A cast is a type of splint that is commonly used to immobilize and support a broken arm (fractured humerus). A cast provides stability to the affected limb, reduces pain, prevents movement, and facilitates healing.

**Why Each Wrong Option is Incorrect:**
A. A broken arm (fractured humerus) typically requires a cast, not a splint.
B. A sprained ankle can be immobilized using a walking boot or brace, not a splint.
C. A dislocated shoulder can be reduced under medical supervision and stabilized using a sling or brace, not a splint.
D. A fractured wrist can be immobilized using a plaster cast, not a splint.

**Why Option D is Incorrect:** Although a fractured wrist can be immobilized using a plaster cast, the correct term is "plaster cast" or "immobilization by plaster cast" rather than "splint." A splint is a more general term for any support or immobilization device, which includes plaster casts but also includes other materials like fiberglass or even braces.

**Why Option A is Correct:** A broken arm (fractured humerus) requires immobilization to prevent further injury and promote healing. A splint is an appropriate device for this purpose, as it can be made of various materials, including plaster, fiberglass, or elastic bandages, and can be customized to fit the affected limb.

**Why Option B is Incorrect:** A sprained ankle typically requires a walking boot or a brace for immobilization, not a splint. These devices are specifically designed to support the ankle joint and reduce pain while allowing some mobility, whereas a splint restricts movement completely.

**Why Option C is Incorrect:** A dislocated shoulder can be reduced under medical supervision, which means the joint is manually reset to its proper position. After reduction, a shoulder can be stabilized using a sling or brace, not a splint. A splint is designed to immobilize a joint or limb and prevent movement.

**Why Option D is Incorrect:** A fractured wrist can be immobilized using a plaster cast, which is specifically designed for the wrist joint or bones in that area. A splint is more general term for any support or immobilization device, including plaster casts but also including other materials like fiberglass or elastic bandages, and can be customized to fit the affected limb.

**Core Concept:** A splint is a general term for any support or immobilization device used in medicine, including plaster casts, fiberglass, elastic bandages, and other materials. It can be customized to fit