ulnar gutter splint HELP

A patient came in with a fracture to the middle phlanx of finger. The doctor says he splinted with a ulnar gutter splint. When I look up a picture of that on the web. It is from the elbow down to hand including two fingers. Which is what the doctor did. And the CPT® code for ulnar gutter splint says it is 29105. however in the CPT® book 29105 says from the shoulder down to the hand. Can anybody please help with this code. Thank you