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An expandable vertebroplasty stent

A vertebroplasty and main body technology, which is applied in the field of medical devices, can solve the problems of loss of vertebral body height, compression, and non-directional support force, and achieves a recovery of vertebral body height, effective distraction effect, and stable support force. Effect

Active Publication Date: 2016-09-14
SHANGHAI JUNLIAN MEDICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the balloon metal tennis ball has the following disadvantages: 1) The bone cement is easy to leak; 2) The balloon is easily punctured by bone spurs; 3) The support force of the balloon or the metal tennis ball is non-directional, which will compress the vertebral body that does not need support 4) The support force of the self-elastic stent cannot be adjusted, and the support is unstable; 5) The height of the vertebral body may be lost again during the operation

Method used

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  • An expandable vertebroplasty stent
  • An expandable vertebroplasty stent
  • An expandable vertebroplasty stent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] to combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Figure 9 , shows a specific embodiment of an expandable vertebroplasty stent of the present invention, including a stent 1 , a core tube 2 and a nut 3 . The stent 1 can be laser-engraved from a nickel-titanium shape memory alloy tube, and its structure includes a front end 11 , a main body 12 , and a rear end 13 , wherein the main body 12 includes upper and lower symmetrical support rods 121 and support pieces 122 . The core tube 2 can be processed by shape memory alloy tube, stainless steel tube or other materials, and the core tube has an inner chamber 23, and at least one through hole is arranged on its tube wall, so that bone cement enters the core tube; the rear part of the core tube The outer surface of 22 has thread, and this thread can cooperate with nut 3. The nut 3 can be made of shape memory alloy pipe, stainless steel pipe or other materials, and its structure includes a front sect...

Embodiment 2

[0034] to combine Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 , shows a specific embodiment of an expandable vertebroplasty stent of the present invention, including a stent 1 , a core tube 2 and a nut 3 . The stent 1 can be made of a stainless steel tube through laser engraving, and its structure includes a front end 11, a main body 12, and a rear end 13, wherein the main body 12 includes upper and lower symmetrical support rods 121, support pieces 122 and expansion pieces 123. In order to control the expansion of the bracket according to the predetermined direction, the support rod 121 forms a certain angle with the tube axis during laser engraving, resulting in a smaller width of the support piece. In order to ensure the area of ​​the support surface of the bracket, the support piece 122 is welded Or the expansion sheet 123 is bonded. The core tube 2 can be processed by shape memory alloy tube, stainless steel tube or other materials, the c...

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Abstract

The invention relates to a medical instrument, in particular to an expandable vertebroplasty stent. The expandable vertebroplasty stent comprises a stent body, a core tube and a nut, and is characterized in that the stent body is a hollow tube and is at least divided into three parts, i.e. a front end, a main body and a rear end; the main body comprises supporting rods and supporting plates which are longitudinally symmetrical; the core tube comprises a front section and a rear section, and the rear section of the core tube is provided with external threads; the nut comprises a front section and a rear section, the internal threads of the cavity of the nut are matched with the rear section of the core tube, the front section of the nut is connected with the rear end of the stent body, and the rear section of the nut is provided with a notch in which the nut can rotate; the front end of the stent body is fixedly connected with the front section of the core tube. The expandable vertebroplasty stent is a stent which can be adjusted on the aspects of expansion degree and expansion direction and keep the expansion height and does not need to be extracted out of a centrum.

Description

technical field [0001] The invention relates to a medical device, in particular to an expandable shaped bracket implanted in a vertebral body. Background technique [0002] Spinal fractures can be caused by a variety of factors. According to its etiology, it can be divided into: 1) physical factors, such as traumatic fractures caused by violence; 2) age physiological factors, such as osteoporosis; 3) biological factors, such as bacterial inflammation, pathology caused by abscesses, etc. Wait. Conservative treatment methods for spinal fractures include: bed rest, brace treatment, anti-osteoporosis drug treatment, etc. Above-mentioned therapeutic method, not only patient is unbearable, and curative effect is relatively poor. In addition, the main means of surgical treatment of spinal fractures is the use of open internal fixation. Its disadvantage is that the trauma area of ​​the operation is relatively large; and for osteoporotic compression fractures, it is very difficul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/56A61M29/02
CPCA61B17/8852A61B2017/00867
Inventor 何海平崔景民
Owner SHANGHAI JUNLIAN MEDICAL EQUIP