Intramedullary rod

An intramedullary rod, also known as an intramedullary nail (IM nail) or inter-locking nail or Küntscher nail, is a metal rod forced into the medullary cavity of a bone. IM nails have long been used to treat fractures of long bones of the body. Gerhard Küntscher is credited with the first use of this device in 1939, during World War II, for soldiers with fractures of the femur. (From Wikipedia)

Radiograph of a woman’s leg after surgery for trauma sustained in a motor vehicle accident. (AnatomyBox)

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