What is the primary purpose of an intrinsic plus splint?

The primary purpose of an intrinsic plus splint is to prevent shortening of ligaments. This type of splint is specifically designed to hold the fingers in a position of function, often with the metacarpophalangeal joints flexed at 70 to 90 degrees and the interphalangeal joints extended. This positioning maintains the length of the collateral ligaments and tendons while preventing potential contractures that could result from prolonged immobilization or injury.

When the intrinsic plus position is maintained, it promotes optimal healing and functionality of the hand, which is particularly crucial after injuries or surgeries affecting the wrist and hand. By keeping the fingers and hand in this advantageous position, the risk of stiffness and shortening of the ligaments is significantly reduced.

While strengthening the fingers, reducing pain in the wrist, or immobilizing the entire arm might be secondary effects or purposes in certain contexts, they do not define the primary function of the intrinsic plus splint as specifically as the prevention of ligament shortening does.