Hand/finger x-rays
X-ray limb and amputated part (if available)
Consider pre-op labs
X-ray limb and amputated part (if available)
Clinical diagnosis
Finger amputation
Distal interphalangeal dislocation 
Ulnar gutter splint
Distal phalanx 
Pressure immobilization dressing
Stirrup splint
Fingertip avulsion
Finger splint