Bone stretching instrument for early and medium femoral head necrosis treatment

A technique for femoral head necrosis and bone traction, applied in medical science, surgery, etc., can solve difficult problems and achieve the effects of promoting repair, improving the success rate of surgery, and increasing local microcirculation

Pending Publication Date: 2021-06-18
SHANGHAI SIXTH PEOPLES HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the difficulty of revascularization and reossification in the necrotic area of ​​the femoral head is still relatively large. Clinically, cases of failure of the hip-preserving technique based on core decompression in the treatment of necrosis of the femoral head still occur from time to time, which brings great harm to the patients. physical and mental pain and financial burden

Method used

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  • Bone stretching instrument for early and medium femoral head necrosis treatment
  • Bone stretching instrument for early and medium femoral head necrosis treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] see Figure 1-2 , according to an embodiment of the present invention, a bone distraction instrument for the treatment of early and mid-stage necrosis of the femoral head, including a front screw 1, the front screw 1 is connected with the femoral body 10, and the bottom of the femoral body 10 is fixed by a screw 9 An external fixation bracket 7 is installed, the end of the fixation screw 9 away from the femoral body 10 runs through the external fixation bracket 7, and a nut 8 is threadedly connected, and one end of the front screw 1 is fixedly connected with a transport screw assembly, The handling screw assembly includes a threaded screw assembly and a rack screw assembly, the threaded screw assembly includes a threaded screw 4, the threaded screw 4 is opposite to the thread of the front screw 1, and the front screw 1 One end is fixedly connected with a threaded screw 4 , and the threaded screw 4 is threadedly connected with the outer fixing bracket 7 , and a lag screw...

Embodiment 2

[0026] see Figure 1-2 , for the rack-type screw assembly, the rack-type screw assembly includes a rack-type screw 11 and a gear 12, the surface of the external fixing bracket 7 is symmetrically connected with a gear 12, and one side of the gear 12 is meshed with Rack-type screw 11, said rack-type screw 11 is fixedly connected with said front-section screw 1, for said front-section screw 1, there is a restricting device 2 fixedly connected between said front-section screw 1 and the conveying screw assembly, for For the restricting device 2, Kirschner wires 3 are installed symmetrically on the surface of the restricting device 2, for the rack-type screw 11, the rack-type screw 11 is cylindrical, for the threaded As for the screw 4 , one end of the threaded screw 4 and the rack screw 11 is fixedly connected with a handle 6 .

[0027] Through the above scheme of the present invention, the restricting device 2 is provided to limit the delivery screw assembly outside the bone colu...

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Abstract

The invention discloses a bone stretching instrument for early and medium femoral head necrosis treatment. The bone stretching instrument comprises a front-section screw, wherein the front-section screw is connected with a femoral body; an outer fixing support is installed at the bottom of the femoral body through a fixing screw; the end, away from the femoral body, of the fixing screw penetrates through the outer fixing support and is in threaded connection with a nut; one end of the front-section screw is fixedly connected with a carrying screw assembly; the carrying screw assembly comprises a threaded screw assembly and a rack type screw assembly; the threaded screw assembly comprises a threaded screw; and one end of the front-section screw is fixedly connected with a threaded screw. The bone stretching instrument has the advantages that a bone column can be slowly and continuously stretched in the femoral neck direction, the traction tension can promote cell proliferation and biosynthesis functions, metabolism and tissue growth become active, the osteogenesis capability is enhanced, local microcirculation is also increased, and finally femoral head necrosis repair is promoted.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a bone distraction device used for the treatment of early and middle stages of necrosis of the femoral head. Background technique [0002] Treatment of osteonecrosis of the femoral head remains a challenge for orthopedic surgeons. Treatment methods for femoral head necrosis mainly include core decompression, porous tantalum rod implantation, vascularized bone grafting, hip replacement, and osteotomy. For patients with early and mid-stage femoral head necrosis, techniques such as core decompression, porous tantalum rod implantation, bone grafting, and osteotomy can be used for head-preserving treatment; however, for advanced femoral head necrosis, even if a satisfactory local Physiological and mechanical environment, also can not reverse the progression of the disease, most of them need hip replacement. Among them, the hip-preserving technique based on core decompressi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/60
CPCA61B17/60A61B2017/564
Inventor 于晓巍单浩杰姜朝来魏保山张长青
Owner SHANGHAI SIXTH PEOPLES HOSPITAL
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