Which device is used to immobilize an acute femur fracture?

A long leg splint is specifically designed to immobilize fractures of the femur, particularly when dealing with acute femur fractures. This type of splint extends from the hip down to the toes, providing the necessary support and stabilization to the entire leg. The design helps prevent movement of the fracture site and allows for alignment of the bone, which is crucial for proper healing.

In the context of managing acute femur fractures, the long leg splint effectively distributes pressure and supports the weight of the leg, ensuring that the fracture is not subjected to unnecessary forces that could disrupt healing. Additionally, it helps maintain the alignment of a fractured femur, which can be vital in preventing complications such as malunion or improper healing.

Other devices, while they may be useful in different scenarios (for instance, short leg splints are typically used for fractures in the lower leg or ankle and do not provide adequate support for the femur) may not provide the immobilization and stability needed for a substantial fracture like one that occurs in the femur. The Hare traction system and Russell's traction apparatus are specialized devices used for traction, which can be an alternative treatment but do not offer the same level of immediate stabilization as a long leg splint does in acute settings.