Which orthosis would be most effective for an individual with a brachial plexus injury and full arm involvement?

• A. A flail arm splint
• B. A wrist cock-up splint
• C. A dynamic splint
• D. A hand-based orthosis

Answer: (A)

A flail arm splint is the most effective choice for an individual with a brachial plexus injury involving full arm involvement because it is designed to support and stabilize the entire arm. This type of splint provides crucial support for the affected arm, allowing the individual to stabilize their limb, which is essential after a brachial plexus injury. These injuries can result in significant weakness or paralysis of the entire arm, so the flail arm splint helps maintain limb positioning, prevents contractures, and can improve function during activities of daily living by allowing for increased control and use of the arm.

In contrast, a wrist cock-up splint primarily supports the wrist and hand, which would not adequately address the needs of someone with full arm involvement. A dynamic splint, while useful for facilitating movement and engagement in therapy, may not provide the necessary stability and support for the entire arm in this case. Finally, a hand-based orthosis targets support for the hand and fingers, which is not sufficient for addressing the comprehensive challenges presented by a brachial plexus injury affecting the whole arm. Thus, the flail arm splint is best suited for maintaining positioning and support in this scenario.