Positions of function for selected joints

Splint	Position
Volar	Neutral forearm (thumb up), wrist at 20 degrees flexion
Ulnar/radial gutter	Neutral forearm, wrist at 20 degrees extension, MCP at 50 degrees flexion, PIP in slight flexion (10 degrees), DIP in extension
Thumb spica	Forearm neutral, wrist at 25 degrees extension, allowing thumb-index finger opposition and alignment of the thumb and forearm
Sugar tong/posterior arm	Elbow at 90 degrees flexion, neutral flexion, neutral wrist
Knee	Knee fully extended if possible, up to 15 degrees of flexion
Posterior ankle/ankle stirrup	Ankle at 90 degrees

MCP: metacarpophalangeal; PIP: proximal interphalangeal; DIP: distal interphalangeal.

Adapted from: Chudnofsky C. Splinting techniques. In: Clinical Procedures in Emergency Medicine, Roberts J, Hedges J (Eds), WB Saunders, Philadelphia, 1998. p.852.

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Positions of function for selected joints