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A minimally invasive cutting tool for spinal canal dilation

A technology for cutting tools and spinal canal, which is applied in the field of pedicle cutting tools to achieve the effects of improving efficiency, reducing the trauma surface and shortening the recovery period.

Active Publication Date: 2015-09-30
BONE MEDICAL TECH OF SUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For spinal stenosis and dilation, minimally invasive still faces many difficulties
So far, there is no surgical method and corresponding special surgical tool that can realize the minimally invasive surgery of spinal canal dilatation.

Method used

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  • A minimally invasive cutting tool for spinal canal dilation
  • A minimally invasive cutting tool for spinal canal dilation
  • A minimally invasive cutting tool for spinal canal dilation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment one: if figure 1 , figure 2 As shown, a minimally invasive cutting tool for spinal canal expansion includes a sleeve rod 1, a cutting rod 2 and a cutting knife 3 that are slidingly sleeved with the sleeve rod, as figure 2As shown, the front portion of the sleeve rod 1 is provided with an opening 11 for the radial extension and retraction of the cutting knife 3, one end of the cutting knife 3 is connected with the cutting rod 2, and the other end is connected with the opening. Corresponding to 11, the cutting knife 3 is in the sleeve rod 1. Although the relative sliding between the cutting rod 2 and the sleeve rod 1 slides in the sleeve rod 1, under the drive of the relative sliding between the cutting rod 2 and the sleeve rod 1, the cutting knife 3 is in the sleeve rod 1. The rod 1 moves, and gradually radially protrudes or retracts from the opening 11 along with the movement. The width of the cutting knife 3 is smaller than the width of the opening 11, wh...

Embodiment 2

[0029] Embodiment 2: On the basis of the foregoing embodiments, as Figure 6 As shown, the part where the cutting 3 is in contact with the pedicle bone is provided with cutting serrations, so as to improve the efficiency of cutting the pedicle bone. The shape of the cutting saw teeth 31 is arc. The arc as described Figure 6 As shown, it means that the shape of the top of the sawtooth is not a traditional pointed row, but a smoother arc. With such a structure, when the cutting knife cuts the pedicle bone, when the front part of the cutting knife stretches out from the surface of the pedicle bone and contacts the human tissue, the arc-shaped sawtooth top will not cut the human tissue and cause secondary trauma. The purpose of cutting off the vertebral pedicle bone without damaging human tissues is achieved.

Embodiment 3

[0030] Embodiment three: on the basis of the foregoing embodiments, as Figure 5 As shown, the cutting rod 2 is provided with a cavity 23 for accommodating the cutting knife 3 . Cutting knife 3 promptly is positioned at this concave cavity 23 when packing up, does not occupy the space area of ​​cover bar 1 and cutting bar 2, guarantees that the section diameter of cutting bar 2 and cover bar 1 meets the size requirement of drilling diameter.

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Abstract

The invention relates to a minimally invasive spinal canal dilatation cutting tool, which comprises a sleeve rod, a cutting rod sleeved with the sleeve rod in a sliding way, and a cutting knife, wherein the front of the sleeve rod is provided with an opening through which the cutting knife radially extends and retracts, and one end of the cutting knife is connected with the cutting rod; and the other end of the cutting knife is opposite to the opening, and the cutting knife radially extends or retracts through the opening under the driving of the relative sliding of the cutting rod and the sleeve rod to complete the cutting operation of pedicle bone. The cutting tool provided by the invention is applied to new minimally invasive spinal stenosis dilatation and is used for cutting off, lengthening and re-fixing the pedicle bone. The cutting tool only operates in a bore with a diameter of about 5mm and is used for cutting off the pedicle bone from the inside out. When the cutting tool enters the bore, the cutting knife retracts; and the cutting knife radially extends to cut the pedicle bone after entering the bore. The minimally invasive spinal canal dilatation surgery is realized in structural design, the wound surface of a patient is small, the period of recovery from surgery for the patient is greatly shortened, and the surgery cost is low.

Description

technical field [0001] The invention relates to a surgical medical instrument, in particular to a pedicle cutting tool used in spinal surgery. Background technique [0002] Spinal stenosis is one of the common diseases in middle-aged and elderly patients. Spinal stenosis is caused by bone hyperplasia in the lumbar spine itself, which causes the spinal canal to become smaller and squeezes the nerves passing through it, causing pain, inability to bend the waist, and numbness of hands and feet. , walking with a limp, etc. Spinal stenosis dilation is one of the main operations in spinal surgery. Performing spinal canal dilation requires the use of specialized surgical tools. [0003] At present, spinal stenosis dilation is an open operation. It needs to make an incision with a length of more than 10 cm on the patient's back, and then cut off and re-fix the vertebrae. This kind of open surgery has a large trauma area and damages soft tissues, and the postoperative recovery per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/3209A61B17/56
Inventor 罗宗平杨惠林
Owner BONE MEDICAL TECH OF SUZHOU CO LTD
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