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Ratchet-shape automatic growth valve

An automatic growth and ratchet technology, applied in medical science, internal bone synthesis, internal fixator, etc., can solve problems such as limiting spinal growth, kyphosis, apical vertebra fusion, etc., saving time and cost, and correcting scoliosis. Deformity, reducing the effect of complications

Active Publication Date: 2017-07-21
SHANGHAI TONGREN HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two types of growth rods: single rod and double rod, but there are some complications in the later stage of growth, such as the growth rod cannot slide, the growth rod breaks, and the fusion of the apical vertebra causes kyphosis, etc.
Theoretically, although this kind of magnetic growth rod does not require multiple lengthening operations, it still cannot solve the problem of regularly going to the hospital to adjust the angle. When the length cannot be adjusted, the growth rod will still limit the growth of the spine, and cannot adapt to the growth of the spine in real time.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0036] Such as Figure 1 ~ Figure 3 As shown, the ratchet-shaped automatic growth valve of the present invention includes an extension rod 1, a fixed rod 2 and a rod sheath 3, and one end of the fixed rod 2 extends into the rod sheath 3 and is fixedly connected to it. A ratchet 7 is provided in the middle of the extension rod 1, and the extension rod 1 is controlled by a one-way moving part 6 to enable the ratchet 7 to achieve one-way extension, and the one-way moving part 6 is arranged near the Inside the side protrusion 8 of the rod sheath 3 .

[0037] The stretching power of the stretching rod 1 is provided by the body's self-timed and quantitative spinal lateral flexion movement, and the usual activity level of the body itself cannot drive the stretching rod to automatically extend. When installed in the body, the telescopic rod 1 is at the top, the growth valve is installed vertically, the side protrusions 8 are embedded in the gap between the two vertebral bodies, and t...

Embodiment 2

[0039] Such as Figure 1 ~ Figure 3 As shown, the ratchet-shaped automatic growth valve also includes a viewing window 4, so as to observe the extension length of the extension rod, and also includes a round protrusion 5, and the round protrusion 5 passes through the side protrusion 8 and is connected with the one-way movement The component 6 is connected, and the one-way moving component 6 can realize two-way movement by rotating the circular protrusion 5 .

[0040] When the stretching rod is stretched too long due to the violent movement of the abnormal situation of the body, the contraction of the stretching rod 1 can be realized manually by operating the above-mentioned circular protrusion.

Embodiment 3

[0042] Such as Figure 1 ~ Figure 3 As shown, the material of the ratchet-shaped automatic growth valve is titanium alloy, the length of the extension rod 1 and the fixed rod 2 are equal, and the extended rod 1 and the fixed rod 2 are cylinders with the same diameter. The connection mode between the fixing rod 2 and the rod sheath 3 is threaded connection; A vertebral body screw is arranged at the end of the rod 2, and the contact surfaces of the rod sheath 3 and the extension rod 1 are smooth;

[0043] Wherein, the extendable length of the stretching rod 1, that is, the length of the ratchet-covered stretching rod 1, is determined according to the normal growth rate of the spine of adolescents, and the growth rate of the thoracic spine of normal children is 1.3cm / yr when they are born to 5 years old , 0.7cm / yr between 5-10 years old.

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Abstract

The invention relates to a ratchet-shape automatic growth valve, which comprises an extending rod, a fixing rod and a rod protective sleeve. One end of the fixing rod extends into and is fixedly connected with the rod protective sleeve, a ratchet is arranged in the middle portion of the extending rod, the extending rod makes the ratchet extend in one direction through control over a unidirectional moving element, the extending power of the extending rod is provided by spinal lateroflexion movements of a body, and the unidirectional moving element is arranged in a lateral protrusion, close to the extending rod, of the rod protective sleeve; the ratchet-shape automatic growth valve further comprises a viewport and a round protrusion, and the round protrusion penetrates through the lateral protrusion and is connected with the unidirectional moving element. Compared with the prior art, the ratchet-shape automatic growth valve can be adapted to spinal growth in real time and has the function of an internal brace at the same time, and thus the effect of correction of a scoliosis deformity can be achieved to some extent.

Description

technical field [0001] The invention relates to a scoliosis orthopedic instrument, in particular to a ratchet-shaped automatic growth valve for juvenile idiopathic scoliosis orthopedics. Background technique [0002] Scoliosis is one of the diseases that seriously endanger human health. It can cause body deformity, affect working ability, damage appearance image, and cause serious harm to patients' physiology and psychology. Adolescent Idiopathic Scoliosis (Adolescent Idiopathic Scoliosis.AIS) is the one with the highest incidence rate among scoliosis, and the incidence rate reported abroad is between 1.06-13.6%. [0003] Many scholars have reported a series of clinical applications of spinal non-fusion techniques, including U-shaped nails and spinal growth guidance systems, etc. However, each non-fusion surgery has its defects. [0004] 1) U-shaped nails: usually used for scoliosis with a Cobb angle of thoracic curve <35°, so it is only suitable for mild thoracic scolio...

Claims

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Application Information

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IPC IPC(8): A61B17/70
CPCA61B17/70A61B17/7002A61B17/7061A61B17/7062A61B2017/564
Inventor 徐炜
Owner SHANGHAI TONGREN HOSPITAL
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