Fracture fixator for femoral trochanteric fracture
First Claim
1. An internal fixator of bone fractures used for fixing a bone fragment on one side of a femoral head with a corresponding bone part on the other side in femoral trochanteric fracture, comprising:
- an elongated sliding nail to be inserted into a fractured area from outside of a femoral shaft;
a femoral head nail adapted to be joined with the sliding nail such that the femoral head nail and the sliding nail cross each other; and
a sleeve plate having a securing part and a sleeve part, the securing part to be secured to the femoral shaft on the outside of the femoral shaft, and the sleeve part to be protecting from the securing part and slidably receiving the sliding nail in an elongated direction of the sliding nail,wherein with the securing part being secured to the femoral shaft, the sleeve part is configured to project in a direction at a high angle of 136°
or more in relation to a femoral axis, assuming that a caudal direction of the femoral axis is defined as 0° and
wherein the femoral head nail, when joined with the sliding nail, is configured to be inserted at a lower angle than the high angle in relation to the femoral axis to reach within the femoral head, so as to firmly hold the bone fragment on the side of the femoral head.
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Accused Products
Abstract
In an internal fixator having a sliding mechanism for treating femoral trochanteric fracture, it is intended to firmly hold the femoral head by setting a sliding direction at a high angle. The fixator is constituted of a sliding nail, a femoral head nail, and a sleeve plate. The sliding nail is inserted at a high angle of about 160° in relation to a femoral axis. The femoral head nail is inserted at a low angle of about 95°. A tip of the femoral head nail is located within the femoral head. The femoral head nail is combined and joined with the sliding nail within the bone. A sliding nail passes and slides within the sleeve of the sleeve plate. A sliding direction is consistent with a tangential direction of an inner cortical bone at a fracture side. Thus, displacement between the fracture edges is less likely to occur and excessive shortening can be avoided. With the femoral head nail, the femoral head can be firmly held.
50 Citations
10 Claims
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1. An internal fixator of bone fractures used for fixing a bone fragment on one side of a femoral head with a corresponding bone part on the other side in femoral trochanteric fracture, comprising:
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an elongated sliding nail to be inserted into a fractured area from outside of a femoral shaft; a femoral head nail adapted to be joined with the sliding nail such that the femoral head nail and the sliding nail cross each other; and a sleeve plate having a securing part and a sleeve part, the securing part to be secured to the femoral shaft on the outside of the femoral shaft, and the sleeve part to be protecting from the securing part and slidably receiving the sliding nail in an elongated direction of the sliding nail, wherein with the securing part being secured to the femoral shaft, the sleeve part is configured to project in a direction at a high angle of 136°
or more in relation to a femoral axis, assuming that a caudal direction of the femoral axis is defined as 0° andwherein the femoral head nail, when joined with the sliding nail, is configured to be inserted at a lower angle than the high angle in relation to the femoral axis to reach within the femoral head, so as to firmly hold the bone fragment on the side of the femoral head. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification