A traction splint may be used for which of the following injuries?

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A traction splint is designed to apply gentle, longitudinal traction to the leg to realign and immobilize a suspected midshaft femur fracture, helping to reduce muscle spasm, pain, and movement during transport. This mechanism targets the femur itself, not joints or the pelvis, so it’s most appropriate for a femur fracture. Knee dislocations involve joint disruption and potential vascular injury, and pelvic fractures require pelvic stabilization with binders or sheets; a traction splint does not stabilize the pelvis or address knee joint injury. Therefore, the best choice is a femur fracture, since that is the scenario where a traction splint provides real benefit.