The Rush Nail is a flexible intramedullary fixation device primarily used for stabilizing fractures of long bones, especially in the upper extremity and pediatric cases. It is a solid, stainless steel rod with a curved, beveled tip and a fluted or hooked end, which provides elastic, three-point fixation within the medullary canal. Unlike rigid nails, the Rush Nail utilizes the principle of elastic deformation to maintain alignment and provide stability without the need for locking screws.

Rush Nails are typically inserted retrograde or antegrade depending on the fracture location, and the curvature allows them to conform to the natural anatomy of the bone. These nails come in various lengths and diameters, making them suitable for both adult and pediatric patients, especially where growth plates must be preserved.