For a CMC OA patient who needs some movement during tasks, which device best fits?

• A. CMC plaster cast
• B. CMC fiberglass cast
• C. CMC neoprene wrap support
• D. Thicker CMC thermoplastic splint

Answer: (C)

The key idea here is choosing a nonrigid, functional support that allows movement while still stabilizing the base of the thumb. In CMC OA, you want a device that reduces pain and protects the joint during activities without locking out motion needed for everyday tasks. A neoprene wrap provides compression and warmth around the base of the thumb, supporting soft tissues and improving proprioceptive feedback while letting the thumb move. This makes it suitable for someone who needs to keep using their hand during tasks.

Rigid options like casts or thick thermoplastic splints immobilize the carpometacarpal joint, which can significantly limit function during daily activities and slow return to normal use. So while immobilization can help with pain during flare-ups or when resting, it isn’t ideal for someone who requires movement during tasks.