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Dilated curette capable of being heightened

An expanding and height-adjusting technology, applied in the field of spinal intervertebral fusion surgical instruments, can solve the problems of affecting the effect of intervertebral disc removal, affecting the fusion effect, and lagging behind the development of intervertebral disc treatment tools, so as to reduce the specifications of surgical instruments, simplify the operation, and adapt to the problem. With a wide range of effects

Pending Publication Date: 2020-01-21
NINGBO HICREN BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention solves the problem that the development of intervertebral disc treatment tools for minimally invasive fusion surgery in the prior art is relatively lagging behind. Conventional treatment tools cannot pass through the minimally invasive working channel, and the treatment tools that can match the minimally invasive working channel are more effective in terms of treatment efficiency, treatment effect, and operation. Convenience and safety cannot be taken into account, which affects the effect of intervertebral disc removal and finally affects the fusion effect. An expansion-type adjustable curette is provided.

Method used

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  • Dilated curette capable of being heightened
  • Dilated curette capable of being heightened
  • Dilated curette capable of being heightened

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In this example, if Figure 1-8 Among them, an expandable height-adjustable curette is provided, including an expandable cutter head 1, an inner tube 19 and a pull rod 18 disposed in the inner tube 19; wherein the proximal ends of the expandable cutter head 1 are respectively connected to The distal end of the inner tube 19 is pin-connected to the distal end of the pull rod 18, and the curette also includes:

[0050]A handle structure 3, which includes a pressure handle 11 and a main handle 12; the pressure handle 11 drives the expandable cutter head 1 to adjust the height through the pull rod 18;

[0051] A height stroke limit protection structure 4, which includes a spring 17, an inner limit block 16, an outer limit block 15 and an indicating block 14 which are sequentially sleeved on the second fixed column 21 at the far end of the pressure handle 11; The outer limiting block 15 is fixedly connected with the main handle 12, and the spring 17 supports the inner limit...

Embodiment 2

[0069] This embodiment provides a specific method of using the expandable height-adjustable curette provided in Embodiment 1.

[0070] In minimally invasive fusion surgery, the working cannula is placed, the intervertebral disc is fenestrated with nucleus pulposus forceps and the nucleus pulposus is simply removed and processed with a reamer. Apply the expansion-type adjustable height curette that embodiment 1 provides afterwards, comprise the following steps:

[0071] (1) According to the patient's preoperative intervertebral disc height assessment results, adjust the height stroke limit protection structure 4, press the indicator block 14, the inner limit block 16 and the outer limit block 15 are released, and rotate the indicator block 14 and the main handle Align the maximum intervertebral disc height of the patient on 12, and then loosen and press the indicating block 14, and the inner limiting block 16 cooperates with the outer limiting block 15 to limit the position und...

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Abstract

The invention provides dilated curette capable of being heightened. The dilated curette includes a dilated tool bit, an inner tube and a pull rod arranged in the inner tube, and further includes a handle structure and a height travel limit protection structure, the handle structure includes a pressing handle and a main handle, the pressing handle heightens through the dilated tool bit driven by the pull rod, the height travel limit protection structure includes a spring, an inner limit block, an outer limit block and an indication block which successively sleeve a second fixed column at the far end of the pressing handle, and the indication block drives the inner limit block to rotate and control the pressing height of the pressing handle. The provided curette can pass through an operatingchannel with a diameter being 7 mm or below to meet the needs of minimally invasive surgeries, the tool bit can be dilated and heightened, patients with different intervertebral disc sizes and heights can be met, surgical instrument specifications are reduced to simplify the surgeries, the height travel limit protection device is further arranged, patients with low intervertebral disc heights areprotected by meeting the requirements of the different intervertebral disc heights, the risk brought by misoperation is also eliminated, and the safety of surgical operation is guaranteed.

Description

technical field [0001] The invention relates to the field of spinal intervertebral fusion surgical instruments, in particular to an expandable height-adjustable curette Background technique [0002] Spinal fusion surgery has achieved good results in the treatment of neck and low back pain and instability of the cervical and lumbar spine. It is a routine operation for the treatment of degenerative disc disease, spondylolisthesis, and segmental instability of the spine. In order to achieve an acceptable spinal fusion procedure, pre-cage implantation is required for existing disc manipulation / removal using disc manipulation tools. [0003] With the development of medicine, fusion surgery under minimally invasive channels is developing rapidly, but the development of corresponding surgical instruments is obviously lagging behind, making some minimally invasive surgery time-consuming or inconvenient to operate. Most of the existing conventional operating instruments are fixed st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/16A61B17/22
CPCA61B17/1659A61B17/1671A61B17/22
Inventor 陈刘斌刘载淳陈琼威张鹏云吕世文
Owner NINGBO HICREN BIOTECH
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