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Bone cement filling balloon structure

A bone cement and balloon technology, applied in the field of medical devices, can solve problems such as being unsuitable for minimally invasive surgery, incapable of filling bone cement, and difficult to operate with a balloon, so as to improve the efficiency and success rate of surgery, shorten the operation time, inject The effect of shortening time

Active Publication Date: 2012-12-26
ZHEJIANG APELOA JIAYUAN BIOMEDICAL MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The balloon can effectively avoid bone cement leakage, but there are still some difficulties in the operation of the balloon, especially not suitable for minimally invasive surgery
[0007] The Chinese patent with the publication number CN 2487345Y discloses a percutaneous kyphoplasty device, which comprises a percutaneous puncture needle, a catheter and a balloon that cooperate with it. The balloon is wrapped on the catheter, and the catheter has air holes, which can Inflate the balloon to make it expand and deform, but the balloon needs to be withdrawn before the bone cement is injected, so it cannot be used for filling bone cement

Method used

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  • Bone cement filling balloon structure
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Using poly DL lactic acid (molecular weight: 50,000) as a raw material, the balloon 1 was prepared by electrospinning, with a thickness of 0.2 mm, a volume of 3 ml, and a handle diameter of 3.5 mm. Holes with a diameter of about 0.01 mm are evenly distributed on the surface of the balloon. The open end of the absorbable balloon 1 is connected to the outer or inner surface of the injector 2 away from the handle end, and the length of the injector 2 is 60 mm. Insert the balloon preloading rod 3 from the interface of the injector 2 that has been connected to the absorbable balloon 1 until the balloon is fully stretched, rotate the preloading rod until the balloon is fully attached to the balloon preloading rod, and the balloon The preloading rod is locked with the locking mechanism 4 on the handle 5 of the injector.

Embodiment 2

[0033] Pass the absorbable balloon device of Example 1 through the working tube with a diameter of 4 mm and a length of 100 mm, so that the balloon is completely exposed outside the working tube, loosen the locking device on the pre-installed rod, reversely rotate and take out the pre-installed rod. Prepare bone cement PMMA10ml, inhale a sufficient amount of bone cement into the external syringe with pressure display after 20s, and then connect it to the interface of bone cement injector 2, inject slowly until the pressure shows 0.5kgf / cm when the added amount is 4ml 2, There is no leakage on the surface of the balloon, and the balloon is not ruptured. After the bone cement solidifies, hold the balloon filled with bone cement with your hand, turn the handle of the injector lightly to disconnect the absorbable balloon filled with bone cement from the injector, and pull out the injector.

Embodiment 3

[0035] Using L lactic acid-glycolic acid copolymer as raw material (molecular weight 80,000), the balloon 1 was prepared by electrospinning, with a thickness of 0.15 mm, a volume of 8 ml, and a handle diameter of 3.2 mm. A laser drilling machine is used to form dozens of holes 6 with a diameter of about 1.0 mm on the surface of the balloon. The open end of the absorbable balloon 1 is connected to the outer or inner surface of the injector 2 away from the handle end, and the length of the injector 2 is 220 mm. Insert the balloon preloading rod 3 from the interface of the injector 2 that has been connected to the absorbable balloon 1 until the balloon is fully stretched, rotate the preloading rod until the balloon is fully attached to the balloon preloading rod, and the balloon The preloading rod is locked with the locking mechanism 4 on the handle 5 of the injector. Inject the bone cement in the same manner as in Example 2 until the pressure shows 0.8kgf / cm when the amount add...

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Abstract

The invention discloses a bone cement filling balloon structure, which comprises a pipeline-shaped injector, and a balloon connected onto the lower end of the injector, wherein a preassembled rod extending into the balloon is arranged in an inner cavity of the injector; the balloon is made of absorbable materials, such as poly-L-lactic acid, poly-DL-lactic acid, polyglycolic acid, polycaprolactone, polyethylene glycol, poly-di-chalk alkyl ketone, polytrimethylene carbonate, and a copolymer or a polymer blend thereof; and the molecular weight of the absorbable materials is 5,000-1,000,000. The bone cement filling balloon structure disclosed by the invention has the advantages that not only is the distribution of bone cement in a vertebral body be effectively controlled to prevent the bone cement from leaking in quantity, but also the bone cement can be absorbed in the body; and the bone cement filling balloon structure is simple to operate during an operation.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a bone cement filling balloon device for percutaneous kyphoplasty. Background technique [0002] Vertebroplasty is a treatment method that injects filling material into the vertebral body through the pedicle to increase the compression resistance of the vertebral body, prevent further collapse of the vertebral body, relieve low back pain and restore the height of the vertebral body. In open surgery for spinal fractures, bone slurry is used as a filling material, but bone slurry cannot immediately restore the strength and stability of the vertebral body. [0003] In 1984, Galibert et al. in France treated a case of C 2 In the case of vertebral body invasive vertebral hemangioma, the method of percutaneous puncture into the vertebral body was firstly used, and the method of injecting polymethylmethacrylate (PMMA), commonly known as "bone cement", into the vertebral body was successf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/56
Inventor 李庆曹烽王琦马驰陈和春熊成东庞秀炳陈栋梁
Owner ZHEJIANG APELOA JIAYUAN BIOMEDICAL MATERIAL
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