Intramedullary nail system
First Claim
Patent Images
1. An intramedullary nail assembly for use in fixation of long bone fractures comprising:
- a telescopic rod having two opposed ends and including a female component and a male component telescopingly interconnected to permit axial movement of the ends relative to each other; and
means for anchoring each end of the telescopic rod to either end of a fractured long bone when the telescopic rod is implanted in the long bone and extends longitudinally through a length of the bone so that the length of the telescopic rod is extendable as the bone heals and bone growth occurs.
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Abstract
An intramedullary nail system includes a telescopic nail assembly for use in fixation of long bone fractures. The nail assembly includes a female hollow nail that is attached to the proximal cortex of the femur, and a male solid nail that is attached to the distal cortex. Anchorage of the telescopic nail assembly is achieved through screw type fixation. The intramedullary nail system has a built-in feature that allows for extension of its length as bone structures heal and normal patient growth occurs, which is particularly advantageous to be used for children above two years of age and below 65 kilograms of body weight.
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Citations
23 Claims
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1. An intramedullary nail assembly for use in fixation of long bone fractures comprising:
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a telescopic rod having two opposed ends and including a female component and a male component telescopingly interconnected to permit axial movement of the ends relative to each other; and
means for anchoring each end of the telescopic rod to either end of a fractured long bone when the telescopic rod is implanted in the long bone and extends longitudinally through a length of the bone so that the length of the telescopic rod is extendable as the bone heals and bone growth occurs. - View Dependent Claims (2, 3, 4, 5)
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6. An intramedullary nail assembly for use in fixation of long bone fractures comprising:
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an elongated tube having one end thereof formed with a bone engagement means;
a rod having one end thereof formed with a bone engagement means;
the rod being slidably and detachably received in the elongated tube to form a telescopic nail assembly with the bone engagement means at opposed ends thereof; and
whereby the telescopic nail assembly is adapted to be implanted in a fractured long bone, extending longitudinally through a length of the bone with the bone engagement means at each end of the telescopic nail assembly anchored in either end of the bone and being extendable as the bone heals and bone growth occurs. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of treating a fracture in a long bone having an intramedullary canal comprising steps of:
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inserting a male nail having a rod and a first bone engagement portion at a forward end of the rod through the intramedullary canal into the bone until the first bone engagement portion is anchored in either one end of the bone, with the rod spanning the fracture;
inserting a female nail having an elongated tube and a second bone engagement portion at a rearward end of the tube through the canal into the bone, to receive a rearward end of the rod sliding into the tube until the second bone engagement portion is anchored in an end of the bone opposite to the end where the first bone engagement portion is anchored so that the male and female nails are axially extendable relative to each other when bone structures heal and bone growth occurs. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification