Femoral extramedullary positioning osteotomy device in knee joint replacement and use method thereof

A knee joint replacement and external positioning technology, which is applied in bone drill guidance, medical science, surgery, etc., can solve problems such as high requirements for the operator's own experience and technical level, inaccurate solutions, and inability to meet the needs of patients

Active Publication Date: 2021-05-25
THE SECOND AFFILIATED HOSPITAL TO NANCHANG UNIV
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the human knee joint is naturally varus, according to the dynamic alignment theory, the femur should also be kept in varus position for osteotomy, and the degree of wear and tear of the patient’s femur needs to be amputated with different thicknesses of the distal femur (because most patients The distal femur is worn), and it is necessary to ensure that the osteotomy plane is parallel to the joint line before the wear occ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Femoral extramedullary positioning osteotomy device in knee joint replacement and use method thereof
  • Femoral extramedullary positioning osteotomy device in knee joint replacement and use method thereof
  • Femoral extramedullary positioning osteotomy device in knee joint replacement and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] refer to Figure 1-13 , femoral extramedullary positioning osteotomy device in knee joint replacement, comprising sliding rod 1, femur 40 after osteotomy and second femoral osteotomy guide plate 51, one end of sliding rod 1 is fixedly connected with first fixing nail 2, the first fixing nail 2 The outer wall of the nail 2 is fixedly connected with the original femur 3, the outer wall of the sliding rod 1 is provided with a sliding block 4, the sliding block 4 is provided with a braking assembly for braking the sliding rod 1, and the top of the sliding block 4 is fixedly connected with a rotating Case 12, the top inner wall and the bottom inner wall of the rotating case 12 are rotatably connected with the same rotating shaft 13, the top of the rotating shaft 13 runs through the rotating case 12 and is fixedly connected with the rotating block 21, and the rotating block 21 is provided with a rotating shaft for driving the rotating block 21 in the rotating case 12. Assembl...

Embodiment 2

[0062] Embodiment two: if Figure 14 As shown in -15, the femoral extramedullary positioning osteotomy device in knee joint replacement, the difference between this embodiment and Embodiment 1 is that: one end of the second fixation nail 41 is fixedly connected with a fixation plate 47, and one side of the fixation plate 47 is rotatably connected Rotating shaft 48 is arranged, and the end of rotating shaft 48 near the femur 40 after osteotomy runs through the fixed plate 47 and is fixedly connected with gear 49.

[0063] Working principle: the first step, first nail the first fixation nail 2 into the medullary cavity of the original femur 3, pull the first sliding rod 17 and the rotating sleeve 19 outward, release the brake of the worm wheel 14 by the locking teeth 20, and secondly The spring 18 begins to compress, and the rotating sleeve 19 is rotated so that the protruding part of the rotating sleeve 19 deviates from the circular groove 16. The rotating sleeve 19 can prevent...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of medical instruments, particularly relates to a femoral extramedullary positioning osteotomy device in knee joint replacement and a use method thereof, and provides the following scheme that the femoral extramedullary positioning osteotomy device comprises a sliding rod, an osteotomy femur and a second femur osteotomy guide plate, wherein the outer wall of the first fixing nail is fixedly connected with an original femoral bone, a sliding block is arranged on the outer wall of the sliding rod, and a braking assembly used for braking the sliding rod is arranged in the sliding block. The osteotomy device is simple in structure and convenient to operate, and the front-back position and the deflection angle of the bone cutting module are obtained by rotating the worm and kicking and moving the sliding block; then the rotating rod is rotated to drive the first thighbone osteotomy guide plate to move, the thickness of the bone needing to be cut is determined, then the rotating shaft drives the gear ring and the rotating disc to rotate, the levelness of the two positioning holes is guaranteed through the circular dial, the vertical line and the falling block, and deviation formed in later osteotomy is prevented.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a femoral extramedullary positioning osteotome and a method of use thereof in knee joint replacement. Background technique [0002] Total knee arthroplasty is a widely used and highly effective treatment for patients with advanced knee disease. Alignment technique is the basis of knee arthroplasty, which refers to the method of osteotomy and prosthesis installation according to the alignment during arthroplasty. The current traditional alignment method is mechanical axis alignment, that is, osteotomy and prosthesis installation are performed according to the mechanical axis of the lower limb formed by the center of the femoral head-knee joint center-ankle joint center. The rotation axis is perpendicular to the mechanical axis. For femoral osteotomy, the current practice is to find the anatomical axis of the femur by inserting the medullary canal rod through the medullary...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A61B17/17A61B17/16
CPCA61B17/1732A61B17/1764A61B17/1657A61B17/1675
Inventor 付晓玲程细高邱睿韫何丁文章乔
Owner THE SECOND AFFILIATED HOSPITAL TO NANCHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap