Femoral head supporting device for treating femoral head necrosis

A technology for femoral head necrosis and supporting devices, which is applied in the field of medical devices, can solve the problems of changing device positions and inability to support devices, etc., and achieves the effects of easy operation, increased service life, and simple structure

Inactive Publication Date: 2020-11-13
昌乐县妇幼保健院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem solved by the present invention is to provide a femoral head support device for treating femoral head necrosis. By fixing and expanding, it solves the problem that the support device cannot be fixed in the femoral head well, so that the device can be easily replaced after being placed. Problems with location changes

Method used

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  • Femoral head supporting device for treating femoral head necrosis
  • Femoral head supporting device for treating femoral head necrosis
  • Femoral head supporting device for treating femoral head necrosis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 , figure 2 Shown, a kind of femoral head support device for the treatment of femoral head necrosis, comprising:

[0037] The shaft sleeve 2 used for expansion and fixation, the interior of the shaft sleeve 2 is hollow, and the surface of the shaft sleeve 2 is provided with several first through holes 23, after the support device is fixed inside the femoral head 4, bone fragments are thrown into the gap, and the first through holes 23 helps the bone cells inside and outside the sleeve grow together, and is divided into an upper part 21 that cannot expand and a lower part 22 that can be squeezed and expanded. The upper part 21 is a cylindrical structure, and the lower part 22 is a There is a conical cylindrical structure with expansion joints 221 inside the side, and several small thorns 24 are provided on the surface of the shaft sleeve 2 to help the shaft sleeve 2 snap into the inside of the femoral head 4. Entering the inside of the femoral head 4, ...

Embodiment 2

[0047] The difference between embodiment 2 and embodiment 1 is that in the last step of the implementation process, the bone crushing mixture is used to fill the gap between the support device and the femoral head curettage focus. The weight ratio is mixed, and the particle 5 for promoting femoral head healing includes a core layer 51 with drug sustained release, a shell layer 52 that protects the core layer 51 during the electrospinning process in the later stage of preparation, and a drug 53 embedded in the core layer 51. According to the function and effect, drugs 53 are divided into: anti-apoptotic healing drugs, calcium absorption-promoting healing drugs, osteocyte-promoting healing drugs and anti-inflammatory healing drugs. The weight ratio of the above four drugs is 1:1:1 :1. Among them, the anti-apoptotic healing drug is zinc, the calcium absorption-promoting healing drug is vitamin D, the osteocyte-promoting healing drug is bone morphogenetic protein, and the anti-inf...

Embodiment 3

[0055] The difference between embodiment 3 and embodiment 1 is that in the last step of the implementation process, the broken bone mixture is filled with the gap between the support device and the curettage of the femoral head. The femoral head healing particles 5 are prepared by embedding. The embedded drugs include zinc for anti-apoptosis, vitamin D for promoting calcium absorption, bone morphogenetic protein for promoting osteocyte formation, and anti-inflammatory healing Cefixime, the weight ratio of the above four drugs is 1:1:1:1.

[0056] The preparation process of the particles promoting femoral head healing is as follows:

[0057] S61: Take the sodium alginate aqueous solution as the water phase, and the isooctane solution of Span 80 as the oil phase. After emulsifying to form a W / O system, slowly add CaCl 2 solution dropwise to cross-link and solidify the sodium alginate droplets to form calcium alginate nanoparticles. After stirring and solidifying, add absolute e...

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PUM

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Abstract

The invention provides a femoral head supporting device for treating femoral head necrosis. The device comprises a mandrel, an expansion fixing piece and a shaft sleeve, wherein the mandrel is of a porous structure and is divided into a head part and a body part; the head is a hemispheroid; the body part is a cylinder divided into an upper half part and a lower half part, the upper half part is ofa hollow cylindrical structure, and the lower half part is internally hollow, is provided with an expansion joint and is of a radial cylindrical structure; the mandrel is sleeved with the shaft sleeve and is spirally fixed through first threads on the outer surface of the mandrel and second threads on the inner surface of the shaft sleeve; the expansion fixing part is fixed to the one-third position of the top of the mandrel; and in the process that the mandrel pushes the shaft sleeve through the first threads, the expansion fixing part extrudes the interior of the shaft sleeve to enable thelower half portion of the shaft sleeve to be expanded and fixed into the femoral head.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a femoral head support device for treating femoral head necrosis. Background technique [0002] Femoral head necrosis is a pathological evolution process, which initially occurs in the load-bearing area of ​​the femoral head. Under the action of stress, the trabecular structure of the necrotic bone is damaged, that is, microfracture, and the subsequent repair process for the damaged bone tissue. If the cause of osteonecrosis is not eliminated, the repair is not perfect, and the damage re-repair process continues, resulting in changes in the structure of the femoral head, collapse and deformation of the femoral head, joint inflammation, and dysfunction. [0003] Necrosis of the femoral head is usually staged by ARCO, and the ARCO stage is generally divided into the following stages: [0004] ARCO stage 1-2, the patient has symptoms of hip pain and discomfort, and the area...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/74
CPCA61B17/74
Inventor 杨艺蕾
Owner 昌乐县妇幼保健院
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