Upper Limb Orthoses

ULO: Principles & Classification - Ortho Blueprint

• Definition: External devices for upper limb; restore/improve function, limit motion, or support a segment.
• Goals:
  • Immobilization (e.g., fracture, inflammation)
  • Mobilization (e.g., contracture, post-surgery)
  • Restriction of unwanted motion
  • Torque transmission
• Classification by Function:
  • Static: No moving parts. Provide support, protection, positioning.
  • Dynamic: Incorporate resilient components (springs, elastics). Assist movement, apply controlled force.
  • Hybrid: Combine static and dynamic features.
• Nomenclature: Based on joints they encompass (e.g., HO: Hand Orthosis; WHO: Wrist-Hand Orthosis; EWHO: Elbow-Wrist-Hand Orthosis).

⭐ Static orthoses provide rigid support for immobilization, protection, or positioning, while dynamic orthoses incorporate resilient components (springs, elastic bands) to generate force, assist movement, or provide controlled resistance.

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Shoulder & Elbow Orthoses - Proximal Protectors

• Shoulder Orthoses:
  • Sling: Support & immobilization.
    • Uses: Clavicle/humerus fractures, dislocations, soft tissue injuries.
  • Airplane Splint: Abduction (~90°).
    • Uses: Brachial plexus injury, post-rotator cuff repair, axillary burns.

    ⭐ An airplane splint, maintaining the shoulder in approximately 90° abduction, is commonly used for brachial plexus injuries (e.g., Erb's palsy recovery) or post-rotator cuff repair to offload tension.

  • Shoulder Immobilizer/Abduction Pillow: Post-op; controls abduction/rotation.
• Elbow Orthoses:
  • Hinged Elbow Brace: Controlled ROM.
    • Uses: Post-surgery, stable fractures.
  • Posterior Elbow Splint/Immobilizer: Immobilization.
    • Uses: Acute injuries, unstable fractures.

Wrist & Hand Orthoses - Dexterity Dynamos

• Goals: ↑ Function, ↓ Pain, Prevent/correct deformity.
• Types:
  • Static: Immobilize, position (e.g., Resting Hand Splint).
  • Dynamic: Assist/control motion (e.g., outrigger for tendon repair).
• Wrist Orthoses:
  • Cock-up Splint:
    • Wrist 15-30° ext. 📌 Cock-up for Carpal Tunnel.
    • Uses: CTS, sprains, tendinitis.

    ⭐ A cock-up splint, maintaining the wrist in 15-30° of extension, is a first-line conservative treatment for Carpal Tunnel Syndrome by maximizing carpal tunnel volume.

  • Thumb Spica Splint:
    • Immobilizes thumb CMC & MCP. 📌 Spica: Scaphoid, Skier's.
    • Uses: De Quervain's, scaphoid #, UCL injury.
• Hand Orthoses:
  • Ulnar Deviation Splint: For RA ulnar drift.
  • Finger Splints: Mallet (DIP ext), Boutonniere (PIP ext).
  • Resting Hand Splint: Functional position (Wrist 10-20° ext, MCP 45-60° flex). oka

Nerve Palsy Orthoses - Neural Navigators

• Goal: Maintain functional hand position, prevent contractures, assist weak muscles, & promote recovery.

• Types: Static (immobilize, support) vs. Dynamic (assist movement, apply controlled force).

• Radial Nerve Palsy (Wrist Drop):

  • Orthosis: Wrist cock-up splint (static) or dynamic wrist extension outrigger.
  • Function: Supports wrist in extension, allows finger flexion/extension.
  • Components: Forearm piece, wrist support, outriggers for MCP extension assist, thumb abduction/extension piece.

  ⭐ For radial nerve palsy presenting with wrist drop, a dynamic orthosis with MCP extension outriggers and thumb support is crucial to prevent contractures and assist function during nerve recovery.

• Ulnar Nerve Palsy (Claw Hand - 4th & 5th digits):

  • Orthosis: Anti-claw splint / MCP flexion block / lumbrical bar.
  • Function: Prevents MCP hyperextension & promotes IP extension of ulnar digits.

• Median Nerve Palsy (Ape Hand / Benediction Hand):

  • Orthosis: Thumb opposition splint (C-bar, thumb spica with opposition post), anti-ape thumb deformity splint.
  • Function: Maintains thumb in opposition, preserves web space.

• Combined Palsies (e.g., Median & Ulnar):

  • Orthosis: Custom-designed to address specific deficits, e.g., figure-of-eight splint for combined clawing and thumb adduction.

• General Principles:

  • Lightweight, comfortable, cosmetically acceptable.
  • Easy to don/doff.
  • Regular follow-up for adjustments. (📌 CARE: Check skin, Adjust fit, Review exercises, Ensure compliance).

High‑Yield Points - ⚡ Biggest Takeaways

• Static orthoses immobilize and support; dynamic orthoses assist or permit motion.
• Cock-up splint for wrist extension (e.g., radial nerve palsy, carpal tunnel syndrome).
• Airplane splint for shoulder abduction (e.g., brachial plexus injury, burns).
• Thumb spica splint immobilizes thumb (e.g., De Quervain's, scaphoid fracture).
• Figure-of-eight splint commonly treats clavicle fractures.
• Knuckle bender splint aids MCP flexion in ulnar nerve palsy.
• Material choice (thermoplastic, metal) dictates rigidity and wear duration.