A Dynamically Adjustable Unilateral External Fixator

An external fixator, unilateral technology, applied in the field of orthopedic rehabilitation medical devices, can solve problems such as accelerated healing of bone tissue, achieve the effects of simplified mechanism design, improved stiffness characteristics, and low manufacturing costs

Active Publication Date: 2021-02-02
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional fixator system is only suitable for static fixation, and cannot promote the load transfer between fractures by regulating the compression distance between broken bones during the healing process, so as to accelerate the healing of bone tissue

Method used

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  • A Dynamically Adjustable Unilateral External Fixator
  • A Dynamically Adjustable Unilateral External Fixator
  • A Dynamically Adjustable Unilateral External Fixator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Such as Figure 1-Figure 8 As shown, a dynamically adjustable unilateral external fixator mainly includes a driving gear sleeve (2), an upper stop clip (1), a lower stop clip (3), a needle (11), an upper Needle clamp (7), lower needle clamp (5), driving lever (4), driving lever clamp (6), driven sleeve gear (8), driven lever (9) and driven lever clamp (10) : Before the operation begins, first determine the insertion position of the needle on the tibia and drill the needle hole, then roughly adjust the position of the unilateral external fixator on the tibia so that the upper side needle clip (7) is aligned with the position of the needle hole, and place the needle ( 11) Insert the upper needle clip (7) and insert it into the drilled hole in the bone at the same time, then tighten the upper needle clip lower screw (26-1), the upper needle clip upper screw (26-2) and the upper needle Clamp the lower nut (27-1) and the upper nut of the upper needle clamp (27-2) so that th...

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Abstract

The invention relates to a dynamically adjustable unilateral external fixator. The driving gear sleeve is connected with the upper and lower stop clips through the driving rod, the driving gear sleeve is connected with the driven sleeve gear through the upper needle clip, the driving rod clip is connected with the driving rod, and the driving rod clip is connected with the slave through the lower needle clip. The moving rod clamp connection; by rotating the driving gear sleeve, the moving distance of the driving gear sleeve on the driving rod can be adjusted, thereby changing the compression distance between the broken bones and controlling the load transmission between the two broken bones. The upper and lower stop clips The position of the driving gear sleeve can be fixed on the driving rod, so as to control the compression movement of the broken bone at any time. The driven sleeve gear can be positioned on the driven rod according to the position of the driving gear sleeve. The existence of the ball pair The angle of the upper and lower pin clamps can be adjusted freely, and the unilateral external fixator composed of the active rod and the driven rod increases its rigidity. The invention realizes the dynamic and static combination of load regulation and compression movement between broken bones, and simplifies the design.

Description

technical field [0001] The invention belongs to the field of orthopedic rehabilitation medical equipment, and in particular relates to a dynamically adjustable unilateral external fixator. Background technique [0002] Tibial fractures are a common orthopedic disorder with a high number. The traditional method of treating this disease is immobilization with plaster, traction or open reduction and internal fixation. The patient usually needs to stay in bed for three months, which often causes joint stiffness. With the development of external fixation technology, external fixation bracket has become one of the more important tools in orthopedic treatment and has been developed rapidly. Among them, the llizarov full-ring external fixator is more prominent, which is a major advancement in the field of bone external fixator technology. Llizarov's technology has also stimulated countless orthopedic surgeons' interest in learning, researching and applying external fixation technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/64A61B17/66
CPCA61B17/6441A61B17/645A61B17/6458A61B17/6466A61B17/66
Inventor 李剑锋赵霞张雷雨胡晓洁陈莹
Owner BEIJING UNIV OF TECH
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