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Improved intramedullary nail internal fixation device for femoral proximal fracture

A technology for a proximal femur and a fixation device, which is applied in the field of medical devices, can solve the problems of stress concentration in screw design, poor fixation of the fixation screw, and excessively large diameter of the screw body, so as to avoid stress concentration, reduce hidden blood loss, and facilitate stress. the effect of conduction

Pending Publication Date: 2017-06-13
刘学进
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the technical problems of the above-mentioned instruments for treating proximal femur fractures in the prior art, such as excessive nail body diameter, poor fixation or failure of fixation nails, design stress concentration and stress shielding of threaded nails, the present invention proposes a Improved intramedullary nail internal fixation device with simple and reasonable structure for proximal femoral fractures

Method used

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  • Improved intramedullary nail internal fixation device for femoral proximal fracture
  • Improved intramedullary nail internal fixation device for femoral proximal fracture
  • Improved intramedullary nail internal fixation device for femoral proximal fracture

Examples

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Effect test

Embodiment 1

[0041] Such as figure 1 As shown, the improved intramedullary nail internal fixation device for proximal femoral fracture includes intramedullary nail 1, fracture fixation nail 2, and intramedullary nail fixation nail 3;

[0042] Such as Figure 2-Figure 5 As shown, the middle surface of the nail body of the intramedullary nail 1 has a self-tapping thread for bone, and is provided with two taper threaded holes 1-1 for fixing the fracture fixation nail 2, and each taper threaded hole 1-1 is between The distance in the vertical direction is 12 mm, the channels of the taper threaded holes 1-1 are parallel to each other, and form an angle α of 135 degrees with the direction of the nail head of the intramedullary nail 1, and the lower surface of the nail body of the intramedullary nail 1 has no thread , and there are two intersecting holes 1-2 for fixing the intramedullary nail 3, the distance between each intersecting hole 1-2 in the vertical direction is 15 mm, and the distance ...

Embodiment 2

[0047] The structure and connection relationship of each part of the improved intramedullary nail internal fixation device for proximal femur fracture described in this embodiment are all the same as in Embodiment 1, and the different technical parameters are:

[0048] 1) The vertical distance between taper threaded holes 1-1 is 16mm;

[0049] 2) The included angle α is 137 degrees;

[0050] 3) The overall length of the intramedullary nail 1 is 150 mm, and the diameter of the nail body is 10 mm;

[0051] 4) Conical transition 2-1 is the overall conical structure of the nail body between the ordinary tapered thread and the nail head, that is, the overall conical transition, with a taper of 1:10;

[0052] 5) There are no threads on the surface of the fracture distal and proximal nail body of the fracture fixation nail 2;

[0053] 6) The overall length of the fracture fixation nail 2 is 105 mm, and the diameter of the nail body is 5 mm;

[0054] 7) The overall length of the in...

Embodiment 3

[0056] The structure and connection relationship of each part of the improved intramedullary nail internal fixation device for proximal femur fracture described in this embodiment are all the same as in Embodiment 1, and the different technical parameters are:

[0057] 1) The vertical distance between taper threaded holes 1-1 is 20mm;

[0058] 2) The included angle α is 140 degrees;

[0059] 3) The overall length of the intramedullary nail 1 is 155 mm, and the diameter of the nail body is 11 mm;

[0060] 4) The length of the tapered transition 2-1 is 15mm;

[0061] 5) There are no threads on the surface of the fracture distal and proximal nail body of the fracture fixation nail 2;

[0062] 6) The overall length of the fracture fixation nail 2 is 130 mm, and the diameter of the nail body is 6 mm;

[0063] 7) The overall length of the intramedullary nail 3 is 40 mm.

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Abstract

The invention discloses an improved intramedullary nail internal fixation device for femoral proximal fracture. The improved intramedullary nail internal fixation device comprises an intramedullary nail, fracture fixation nails and intramedullary nail fixation nails. The intramedullary nail can be arranged in proximal bone marrow of femurs, the fracture fixation nails penetrate the intramedullary nail, are locked with the intramedullary nail and further penetrate fracture proximal ends, and the intramedullary nail is fixed by the aid of the intramedullary nail fixation nails. The improved intramedullary nail internal fixation device has the advantages that the improved intramedullary nail internal fixation device is easy to operate and high in practicality; biological characteristics and mechanics characteristics of in-vivo bones are sufficiently utilized, and accordingly the improved intramedullary nail internal fixation device is in accordance with natural tendency, adapts to trend, conforms to the functional adaptation of the bones and approaches natural reconstruction to the greatest extent; reverse thinking is utilized for integral conception, and significant exploration is carried out on senile femoral proximal fracture treatment which is an orthopedic difficult problem.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an improved intramedullary nail internal fixation device for proximal femur fractures. Background technique [0002] Due to the acceleration of the population aging process, the incidence of proximal femoral fractures has gradually increased. According to statistics in the United States in 2000, about 350,000 people in the United States received treatment for such fractures, accounting for more than 1.2% of the total population. There is no strict statistical data in our country. For example, according to the population ratio of the United States, it is estimated that there are about 1.7 million patients with such fractures in our country every year. At present, the equipment used in China is all foreign technology, most of which are imported, and some are imitated. Most of these patients are elderly people. Due to their frailty and osteoporosis, some patients can only g...

Claims

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Application Information

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IPC IPC(8): A61B17/72A61B17/76
CPCA61B17/7233A61B17/744
Inventor 刘学进汤欣马凯李仕国马克
Owner 刘学进
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