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Unilateral three -dimensional external fixed device

An external fixator, three-dimensional technology, applied in the field of medical devices, can solve the problems of unsightly exposed fixation needles, affecting the daily activities of patients, unable to achieve three-dimensional fixation, etc., shortening the time required for adjusting the fixation, convenient self-care, Lightweight and beautiful overall design

Inactive Publication Date: 2017-12-12
魏春群
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the 1970s, people generally used bilateral external fixators. It was believed that the mechanical stability of this kind of external fixator was stronger than that of unilateral fixator. With an in-depth understanding of the relationship between mechanical stability and fracture healing, the current trend is to use unilateral external fixators that do not penetrate both sides of the limb, are sufficient but not absolutely firm and stable
[0004] 1. The range of motion is limited, and the position far away from the fixed rod cannot be fixed, and the real three-dimensional fixation cannot be realized;
[0005] 2. There are too many joints, the degree of deformation caused by force after fixation is large, and the fixation strength is weak;
[0006] 3. Intraoperative operation is cumbersome, resulting in prolonged operation time;
[0007] 4. The exposed part of the fixation needle is unsightly, which affects the patient's dressing and daily activities

Method used

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  • Unilateral three -dimensional external fixed device
  • Unilateral three -dimensional external fixed device
  • Unilateral three -dimensional external fixed device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as Figure 1-Figure 12 As shown, the unilateral three-dimensional external fixator in this example includes a connecting rod 1, four clamping blocks 2, four fixed short rods 3 and four traction nails 5, and the traction nails 5 are fixed on the fixed short rods 3. The clamping block 2 is sleeved on the connecting rod 1 , and the fixed short rod 3 is fixed on the clamping block 2 .

[0042] The traction nail 5 is an integrally formed breakable self-locking fixing screw, including a breakable part 51 and a nail body 52; Nut 521 ; the main body of the breakable part 51 is cylindrical, and the part where the breakable part 51 is connected to the nut 521 is in the shape of a truncated cone.

[0043] The upper part of the fixed short rod 3 is provided with a first screw hole 6 matching the breakable self-locking fixing screw, and the lower part of the fixed short rod 3 is provided with a cylindrical positioning pin 7; the clamp block 2 includes Left fixed block, right ...

Embodiment 2

[0047] The difference between this embodiment and the first embodiment is that the short fixing rod 3 is arc-shaped.

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PUM

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Abstract

The invention provides a unilateral three-dimensional external fixator which comprises connecting rods, short fixing rods, fixing bolts, traction nails and clamping blocks. The traction nails are fixed to the short fixing rods. The connecting rods are sleeved with the clamping blocks. The short fixing rods are fixed to the clamping blocks. The clamping blocks are fixed to the connecting rods through the fixing bolts. Self locking of the short fixing rods and the traction nails is achieved in a threaded mode. The unilateral three-dimensional external fixator is provided with a small number of components and is simple in structure, easy to assemble and capable of conducting fixation easily. Since the combined clamping blocks are selected, the fixing positions and the number of the clamping blocks can be selected according to fracture types, and true three-dimensional fixation can be realized through the clamping blocks and the short fixing rods with different lengths and different radians. The unilateral three-dimensional external fixator is light and attractive in overall design and capable of being used by a patient conveniently and facilitating self nursing.

Description

technical field [0001] The invention relates to a medical device, in particular to a unilateral three-dimensional external fixator. Background technique [0002] Since the beginning of this century, the bone penetrating needle fixation has been used to treat fractures. In the following decades of development, an external fixator composed of fixation pins, fixation clips and large rods has been formed. It has been continuously improved and its application has become more and more extensive. It is reflected in : 1. Fixing needle: Apply stainless steel threaded needle. 2. The flexibility of the external fixator: The external fixator that can only be adjusted on a single plane forms multiple planes through the universal joint sliding rod, which can perform functions such as fracture reduction, traction, and compression. 3. Improve the stability of the holder. Before the 1970s, people generally used bilateral external fixators. It was believed that the mechanical stability of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/64
CPCA61B17/64
Inventor 魏春群
Owner 魏春群
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