What type of fracture is defined as a fracture of the ulna shaft?

A fracture of the ulna shaft is specifically referred to as a night stick fracture. This type of fracture typically occurs when there is a direct blow to the arm, commonly from an attempt to block an attack, leading to an injury primarily localized to the ulna.

The term derives its name from the common historical context where this fracture was often sustained during violent confrontations where the ulna was used defensively. Recognizing this definition helps in understanding not only the anatomy involved but also the common mechanisms of injury associated with this specific type of fracture.

In contrast, the other terms refer to different kinds of injuries: a navicular fracture pertains to the wrist, particularly involving the scaphoid bone; a tufts fracture is associated with the distal phalanx, often impacting the fingertips; while a gameskeepers fracture involves the distal ulna, occurring typically from twisting injuries in the thumb. Understanding these distinctions reinforces the importance of accurate terminology in orthopedics.