A shape memory fixer for vertebral canal plastic operation

A fixer and memory technology, applied in the field of medical devices, can solve problems such as high technical requirements, high difficulty, and failed operations, and achieve the effect of good safety and easy operation

Inactive Publication Date: 2006-12-20
王新伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has greatly improved the effect of laminoplasty, but this technology also has its limitations. First, there is a risk of damage to the spinal cord and peripheral nerves when the screw is screwed in. Second, in actual operation, 4 to 6 pieces of diameter Screws that are only 1.5mm not only take a long time, but also require high technical requirements; in addition, before using this technology to fix the plate, the lamina must be lifted to a predetermined width before fixing, otherwise the expansion and decompression will not be achieved. effect; and this "opening the door" operation is not only technically demanding, but also quite difficult, which involves the safety of the operation, and improper operation will lead to the failure of the operation
Due to the differences in the anatomical structure of the cervical spine and the thoracic and lumbar spine, this technique cannot be used for spinal canal reconstruction after thoracic and lumbar laminectomy

Method used

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  • A shape memory fixer for vertebral canal plastic operation
  • A shape memory fixer for vertebral canal plastic operation
  • A shape memory fixer for vertebral canal plastic operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 A Fixer for Cervical Laminoplasty

[0016] The rectangular metal plate 1 of the cervical spinal canal fixer is 14mm in length, 6mm in width, and 1mm in thickness, in which the extension part 1.1 is 6mm in length, and the arc is 3mm in height. The rectangular hollow 1.2 in the middle is 6mm in length and 4mm in width; Each is 4mm, the screw hole 1.4 is 1.5mm in diameter; the length of the fixed claw 2 is 4mm, the width is 2mm, the thickness is 1.5mm, it is bent at 95 degrees, and the depth of the tiger's mouth is 2.5mm. This example can be used for enlarged cervical vertebral canal plastic surgery. During the operation, according to the actual situation, screws can be screwed into the screw cavity, or no screws can be screwed in.

Embodiment 2

[0017] Example 2 A fixer for thoracic vertebral canal

[0018] The rectangular metal plate 1 of the thoracic spinal canal fixer is 26mm in length, 8mm in width, and 1mm in thickness, in which the extension part 1.1 is 16mm in length, and the arched arc is 6mm in height. The rectangular hollow 1.2 in the middle is 15mm in length and 7mm in width; Each is 5mm, the screw hole 1.4 is 2mm in diameter; the length of the fixed claw 2 is 4mm, the width is 2mm, the thickness is 1.5mm, it is bent at 90 degrees, and the depth of the tiger's mouth is 3mm. This case can be used for thoracic laminar reconstruction.

Embodiment 3

[0019] Example 3 A fixer for lumbar spinal canal plastic surgery

[0020] The rectangular metal plate 1 of the lumbar vertebral canal fixer has a length of 10mm, a width of 8mm, and a thickness of 1mm, wherein the stretching part 1.1 is 4mm long, and the arc is 3mm high. The rectangular hollow 1.2 in the middle is 3.5mm long and 5mm wide; the fixing plate 1.3 The length is 3mm, the screw hole 1.4 is 2mm in diameter; the length of the two fixed claws 2 is 3mm, the width is 2mm, the thickness is 1.5mm, and it is bent at 88 degrees. The depth of the tiger's mouth is 3mm. This example can be used for lumbar laminar reimplantation plastic surgery. Two fixers are required during use, which are respectively fixed at both ends of the replanted lamina.

[0021] When the present invention is in use, appropriate specifications and models should be selected. At first, laminoplasty (or laminectomy) should be performed according to the conventional operation steps. Lift it up to form a "do...

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Abstract

The invention relates to medical treatment technology, which in detail relates to form memory fixer used for neural canal decompression shaping operation for axial skeleton. It is made from nickel tantalum form memory alloy, comprises rectangular metal plate (1) and hook solid jaw (2), the middle section of rectangular metal plate is arch curve, that is extension part (1.1), the two sides are mounting plate (1.3), solid jaw is installed in lower part of interface between extension part and mounting plate, and forms tiger fixing part with mounting plate to clutch and fix residual end in two sides of vertebral plate. Softening nickel-titanium alloy at 0-4 Deg. C, bending its extension part, opening fixing part, putting residual end of vertebral plate in the tiger's jaw, heating to set temperature to make fixer become original shape, the fixing part clutch and fix said residual end and open vertebral plate through extension, and the decompression and shaping of neural canal are realized. The invention is characterized by simple operation, good safety and wide application for various neural canal shaping operation.

Description

technical field [0001] The invention relates to the technical field of medical instruments, and relates to a shape-memory fixator used for posterior spinal canal decompression and plastic surgery. Background technique [0002] Posterior decompression of the spinal canal is widely used clinically for various injuries such as spinal degenerative diseases, spinal trauma, and spinal tumors, accounting for more than 70% of spinal surgery. There are two basic types of posterior decompression of the spinal canal: one is laminectomy, that is, the complete removal of all the posterior protective structure of the spine, the lamina, to reduce the pressure in the spinal canal. However, due to the removal of almost all the posterior structures of the spinal canal, such as spinous processes, lamina, and even some small joints, on the one hand, the dural sac tissue that houses the spinal cord loses the protection of the bony lamina and is completely exposed. On...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70A61L27/04
Inventor 王新伟
Owner 王新伟
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