Page 81 - Orthopedic Casting Manual

Thumb Spica Cast

The thumb spica cast is designed to immobilize the thumb and wrist while
leaving the fingers free for movement.

Indications: This cast is commonly used for scaphoid fractures, De Quer vainʼs
tenosynovitis, and ligamentous injuries of the thumb, such as ulnar collateral

ligament tears LBer trand et al., 2018M.

Application Steps:

1. Position the thumb in opposition and slight flexion to preser ve function and
ensure proper healing alignment.

2. Apply the stockinette and padding, ensuring coverage of the thumb up to the
inter phalangeal joint.

3. Wrap the casting material around the wrist, hand, and thumb in over lapping
layers.

4. Mold the cast carefully around the thenar and hypothenar eminences to
maintain thumb position.

5. Verify thumb immobilization while preser ving adequate circulation.