Y-shaped branched chain external fixator for correcting long bone deformity

A technology of external fixator and long branch chain, applied in the direction of external fixator, fixator, etc., can solve the problems of increasing the patient's limb and external fixator drive rod, interruption of correction strategy, and smaller space in the ring, so as to increase stability And spin ability, increase ability, avoid the effect of interference and collision

Active Publication Date: 2020-08-04
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Parallel external fixator has high lateral rigidity, which is beneficial to bone healing, but its huge structure surrounding the patient's limbs results in a smaller space in the ring and a larger volume. When performing angle correction, especially large-angle rotation correction, external fixation

Method used

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  • Y-shaped branched chain external fixator for correcting long bone deformity
  • Y-shaped branched chain external fixator for correcting long bone deformity
  • Y-shaped branched chain external fixator for correcting long bone deformity

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[0019] The present invention will be described in detail below with reference to the embodiments shown in the drawings. However, it should be noted that these embodiments are not a limitation of the present invention. Those skilled in the art will perform functions, methods, or structures based on these embodiments. The equivalent transformation or substitution of are all within the protection scope of the present invention.

[0020] Participate Figure 1 to Figure 9 As shown, figure 1 It is an overall view of a Y-shaped branch chain external fixator used for long bone deformity correction of the present invention, figure 2 Is a diagram of the distal ring structure; image 3 Is the structure diagram of the proximal ring, Figure 4 Is the y-type branched chain structure diagram, Figure 5 It is the long-chain branch structure diagram and cross-sectional diagram, Image 6 It is a short-branched structure diagram and a cross-sectional diagram, Figure 7 Is the overall view of the spi...

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Abstract

The invention relates to a y-shaped branched chain external fixator for long bone deformity correction, the external fixator comprises a near-end ring, a far-end ring, a y-shaped composite branched chain and a spin adjusting assembly, the y-shaped composite branched chain is composed of a long branched chain and a short branched chain, and the short branched chain is connected with the top of a lead screw sleeve of the long branched chain through a hooke joint rotating base; the self-rotating adjusting assembly is arranged at the bottom of the far-end ring of the external fixator, so that an independent self-rotating degree of freedom is increased, and when rotational deformity needs to be corrected, the self-rotating adjusting assembly is adjusted firstly to correct the rotational deformity, and then deformity in other directions is corrected. By arranging the y-shaped branch chains and the self-rotation adjusting assembly, the capacity of correcting rotation deformity of the externalfixator is improved, interference and collision between the branch chains and between the branch chains and limbs during deformity correction are avoided, meanwhile, space 6-DOF movement can be achieved, and three-dimensional bone deformity in any space can be corrected.

Description

technical field [0001] The invention relates to an orthopedic parallel external fixator, in particular to a Y-shaped branched chain external fixator for long bone deformity correction. Background technique [0002] External fixator is widely used in orthopedic surgery based on distraction osteogenesis technology. It is a minimally invasive tool with small trauma and wide indications. It provides stable and elastic fixation in the process of limb fracture reduction and deformity correction. Parallel external fixator has high lateral rigidity, which is beneficial to bone healing, but its huge structure surrounding the patient's limbs results in a smaller space in the ring and a larger volume. When performing angle correction, especially large-angle rotation correction, external fixation The space in the ring of the device will be greatly reduced, increasing the possibility of the patient's limb colliding with the drive rod of the external fixator. Once the patient's limb coll...

Claims

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Application Information

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IPC IPC(8): A61B17/62
CPCA61B17/62
Inventor 李剑锋李国通董明杰左世平
Owner BEIJING UNIV OF TECH
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