Vertebral body internal expansion device based on three-column fixation, implantation sleeve and implantation method

A technology of expansion device and vertebral body, which is applied in the field of medical devices to achieve the effects of improving stability, reducing the incidence of surgical failure, and avoiding the risk of injury

Pending Publication Date: 2020-07-28
FIRST PEOPLES HOSPITAL OF YUNNAN PROVINCE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has not been widely promoted into clinical practice, it has achieved certain results

Method used

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  • Vertebral body internal expansion device based on three-column fixation, implantation sleeve and implantation method
  • Vertebral body internal expansion device based on three-column fixation, implantation sleeve and implantation method
  • Vertebral body internal expansion device based on three-column fixation, implantation sleeve and implantation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Instructions attached Figure 1-7 As shown, a vertebral body expansion device based on three-column fixation includes a slender implant body 1 hollowed out in the middle and a hollow screw 2 inside. The distal port of the implant body 1 is provided with a first internal thread 11. The proximal port of the implant body 1 is connected to the head of the screw 2 in one piece.

[0048] Further, as attached to the manual Figure 4-6 As shown, the implant 1 and the screw 2 can also be separated and assembled, by providing a second internal thread 12 in the proximal port of the implant 1 that matches the thread of the head of the screw 2 .

[0049] Further, the middle part of the implant 1 is a mesh structure, crossing to form holes of different shapes, and by reducing the distance between the distal end and the proximal end of the implant 1, the middle part of the implant 1 expands, as shown in the attached manual. image 3 and Figure 6 As shown, the elongated implant 1 exp...

Embodiment 2

[0053] As attached to the manual Figure 8 As shown, a kind of sleeve implanted in the vertebral body based on three-column fixation, the implant sleeve 3 includes an outer sleeve 31 and an inner rod 32, the inner rod 32 can move in the outer sleeve 31, and the inner rod 32 One end is provided with an external thread 321 .

[0054] Further, the external thread 321 is compatible with the first internal thread 11 .

Embodiment 3

[0056] A method for implanting an integrated expansion device in a vertebral body based on three-column fixation, comprising the following steps:

[0057] Step 1, establishing a working channel 4 to the fracture area through bilateral or unilateral pedicle 6 channels;

[0058] Step 2, as shown in the manual Figure 11-14 As shown, the integrated vertebral body expansion device of appropriate size is implanted into the target area in the vertebral body 5 through the established working channel 4 by using the implant sleeve 3, and the first half of the implant body 1 and the screw 2 support the vertebral body 5 , the second half of the screw 2 holds the pedicle 6; Figure 12 As shown, screw into the inner rod 32 of the implant sleeve 3, the inner rod 32 passes through the inside of the screw 2, and passes through the implant 1, through the external thread 321 and the first internal thread at the distal end of the implant 1 11 connection, the outer sleeve 31 of the implanted sl...

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Abstract

The invention discloses a vertebral body internal expansion device based on three-column fixation, an implantation sleeve and an implantation method. An elongated implant (1) with a hollow middle anda hollow screw (2) form an integrated or separated expansion device, the implantation sleeve (3) comprises an outer sleeve (31) and an inner rod (32), the inner rod (32) can move in the outer sleeve (31), and an external thread (321) is arranged at one end of the inner rod (32), an integrated vertebral body internal expansion device or a separated assembly type vertebral body internal expansion device can be implanted into target area in a vertebral body through an established working channel (4) by means of the implantation sleeve (3), and the distance between a front end and a proximal end of the implant (1) is shortened through the acting force between the outer sleeve (31) and the inner rod (32); the middle part of the implant (1) is expanded to have a certain supporting force, so thatimmediate mechanical support in an operation is realized; and three-column fixation is realized through the implant (1) and the screw (2), so that the stability of the expansion device in the vertebral body is further enhanced.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a three-column fixation-based intravertebral expansion device, an implant sleeve and an implant method. Background technique [0002] Osteoporosis is an age-related disease. By 2020, for the first time, the number of people aged 60 and over will exceed the number of people under the age of 5. There are currently 841 million elderly people aged 60 and over in the world, and it is expected to reach 2 billion by 2050. Osteoporosis and its related complications have become the main diseases that threaten the health of the elderly. Among them, about 39% of women over the age of 65 suffer from osteoporotic vertebral compression fractures. [0003] The most widely used treatment methods are percutaneous vertebroplasty (PVP) and percutaneous kyphoplasty (PKP), both of which aim to infuse polymethacrylate into the fractured vertebral body. Ester (polymethyl methacr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/88
CPCA61B17/88A61B17/8852
Inventor 陆维陆声
Owner FIRST PEOPLES HOSPITAL OF YUNNAN PROVINCE
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