Integrated injection implementation method and device of injectable bone substitute in vertebral body molding

A bone substitute and vertebral body shaping technology, which is applied in the field of surgical instruments and devices, can solve the problems of non-fixed space structure, extremely high operating skills, and complicated steps, so as to prevent leakage risks, avoid leakage risks, and shorten the The effect of operating time

Pending Publication Date: 2020-04-24
山东明德生物医学工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] 3) The mechanical bearing effect is not good
[0008] Due to the dispersion of the injected bone cement, there is no fixed space structure, and the maximum bearing capacity cannot be formed in the vertical direction.
Improper spatial distribution of bone cement makes the bone cement unbalanced and prone to breakage, which in turn leads to secondary collapse of the vertebral body and has to be

Method used

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  • Integrated injection implementation method and device of injectable bone substitute in vertebral body molding
  • Integrated injection implementation method and device of injectable bone substitute in vertebral body molding
  • Integrated injection implementation method and device of injectable bone substitute in vertebral body molding

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] 1. Preparation of materials:

[0110] a) Select PEEK thin-walled tubing as the biocompatible polymer hollow tube:

[0111] The pipe has an outer diameter of about 4mm and a thickness of about 1.5mm.

[0112] b) PEEK pipe pre-bending pre-treatment:

[0113] i. The starting end or the first end (that is, the end injected into the vertebral body O) of the biocompatible polymer hollow tube 1 is sealed, and a closed end 2 is formed at its front end (such as figure 2 shown in ).

[0114] ii. Drill holes on the inner side of the tubing to form the inner hole 3, the diameter of the inner hole matches the flow of the bone cement, about 2mm. Since the starting end is closed, after the bone cement is injected into the tubing, it can be injected into the inner space of the helical tubing through the inner hole.

[0115] iii. Make circular cutting or serpentine cutting on the surface of the pipe, and form a circular, serpentine or helical cutting groove 4 on the outer surface o...

Embodiment 2

[0157] The basic idea to solve the problem:

[0158] Combining the basic principles of tunnel shield machine / heading machine and flexible shaft drill, the spiral tunnel is continuously excavated in the vertebral body; then the drill bit is withdrawn from the flexible shaft tube, and the degradable part of the flexible shaft tube is retained in the tunnel , and finally inject the bone cement into the degradable flexible shaft tube to complete the bone cement shield of the spiral tunnel.

[0159] Specifically, its implementation process is as follows:

[0160] 1) Flexible shield system guided by memory alloy guide pin (also known as guide wire):

[0161] a. The system consists of a head drill 20 (participating Figure 16 shown in ), the flexible flexible shaft tube in the middle, and the driving device (not shown in the figure) at the tail are composed together.

[0162] b. The flexible flexible shaft tube part is divided into four layers: the outer layer is a degradable tube...

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Abstract

An integrated injection implementation method and a device of an injectable bone substitute in vertebral body forming belong to the field of medical instruments. A memory alloy guide pin is inserted into a hollow tube for thermal presetting, the hollow tube and the memory alloy guide pin are integrally and synchronously pushed into a vertebral body, the hollow tube is rapidly rebounded to the original curvature through internal stress under the guidance of the memory alloy guide pin, and the boundary of an injectable bone substitute filling space or a boundary fence serving as the filling space is formed; an injectable bone substitute is injected to a specified position through the hollow tube; and the hollow tube and a filling space defined by the hollow tube are filled with the injectable bone substitute at a specified part in the vertebral body. The injection area of the injectable bone substitute has plannability, and multiple steps of operations such as puncture, distraction, implant and bone cement injection, forming and the like in the vertebroplasty are integrally achieved. And all the steps are synchronously carried out, so that the operation process is greatly optimized,the operation time is shortened, and the operation difficulty is reduced. The method can be widely applied to the field of design and manufacturing of orthopedic implant injection devices.

Description

technical field [0001] The invention belongs to the field of surgical instruments, devices or methods, and in particular relates to a method and a device for injecting a bone substitute into a vertebral body and shaping it. Background technique [0002] Percutaneous vertebroplasty (PVP) and percutaneous kyphoplasty (PKP) have been used clinically for many years, and the main clinical problems are: [0003] 1) The uncertainty of the bone cement injection area. [0004] In traditional balloon surgery, the injected bone cement has no boundary constraints, freely diffuses and fills, and the controllability is poor. Therefore, it is difficult to accurately calculate the injection volume before the operation. If it is too small, it will be difficult to achieve the molding effect, and if it is too large, there will be a risk of side leakage. [0005] 2) High probability of complications caused by bone cement leakage. [0006] When the cortical bone in the outer layer of the vert...

Claims

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Application Information

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IPC IPC(8): A61B17/88
CPCA61B17/8805A61B17/8816
Inventor 陈博李朝阳吕维加
Owner 山东明德生物医学工程有限公司
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