CN214017787U - A vertebral body fracture lordoplasty device - Google Patents
A vertebral body fracture lordoplasty device Download PDFInfo
- Publication number
- CN214017787U CN214017787U CN202021921462.4U CN202021921462U CN214017787U CN 214017787 U CN214017787 U CN 214017787U CN 202021921462 U CN202021921462 U CN 202021921462U CN 214017787 U CN214017787 U CN 214017787U
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- China
- Prior art keywords
- working channel
- lordoplasty
- channel tube
- vertebral
- vertebral body
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- 239000002639 bone cement Substances 0.000 claims abstract description 12
- 208000010392 Bone Fractures Diseases 0.000 claims description 13
- 206010017076 Fracture Diseases 0.000 claims description 13
- 206010041569 spinal fracture Diseases 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 208000007623 Lordosis Diseases 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 206010010214 Compression fracture Diseases 0.000 description 2
- 206010023509 Kyphosis Diseases 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000001054 cortical effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 210000004712 air sac Anatomy 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 230000001009 osteoporotic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
Images
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- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The utility model relates to a kyphoplasty device for vertebral body fracture, which comprises a working channel tube with the top end placed into the vertebral body through the vertebral pedicle, and a bolt group for tensioning the space between the adjacent working channel tubes; the tail of the working channel pipe is provided with a fixed block, a through hole is arranged in the fixed block, and the bolt group penetrates through the through hole on the adjacent working channel pipe and is assembled and screwed. The utility model discloses can carry out the basis that bone cement reinforces at the adjacent centrum of fracture centrum to the sleeve pipe of neighbouring centrum is the lever, uses the joint suddenly to be the fulcrum, exerts preceding convex moment, and the centrum of compression resets corrects the back convex deformity, can obtain comparatively ideal effect that resets.
Description
Technical Field
The utility model relates to a surgical instrument, in particular to a vertebral fracture reduction device applied to the vertebroplasty.
Background
Osteoporotic thoracolumbar vertebral compression fractures are a common senile disease, and percutaneous vertebral reinforcement technology is the most common surgical method. The percutaneous vertebral body strengthening technology mainly comprises vertebroplasty and kyphoplasty, and the two technologies are used for strengthening and stabilizing fractured vertebral bodies by injecting bone cement so as to achieve the purpose of immediately relieving pain symptoms. For severe vertebral compression fractures, segmental kyphosis is often associated.
However, vertebroplasty cannot sufficiently restore the height of the vertebral body and segmental lordosis, and therefore, cannot effectively solve the problem of kyphosis. Kyphoplasty can theoretically restore segmental lordosis and vertebral body height by opening a compressed fractured vertebral body through an air sac. However, in clinical procedures, vertebral body height restoration and deformity correction is limited because the height of the distracted vertebral body partially collapses again during the period from balloon deflation to cement injection, and therefore, the maximum corrected kyphoplasty is 6-9 ° and the orthopedic effect is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art, solve the defects of the percutaneous vertebral body strengthening technology in the prior art and realize the lordosis forming operation in a matching way.
In order to achieve the purpose of the utility model, the utility model provides a kyphoplasty device for vertebral body fracture, which comprises a working channel tube with the top end placed into the vertebral body through the vertebral pedicle, and a bolt group for tensioning the space between the adjacent working channel tubes; the tail of the working channel pipe is provided with a fixed block, a through hole is arranged in the fixed block, and the bolt group penetrates through the through hole on the adjacent working channel pipe and is assembled and screwed.
The bolt group comprises a long bolt and a nut matched with the long bolt; when the long bolt fastening device is used specifically, the long bolt penetrates through the through holes in sequence, the head of the long bolt is abutted against the fixing block, and then the matched nut is abutted against the other fixing block and the bolt group is screwed, so that the distance between the fixing blocks is shortened.
Preferably, the through hole is a long round hole with the long diameter parallel to the central axis of the working channel pipe.
Preferably, the side wall of the working channel pipe is provided with scales along the axial direction.
The scale as referred to herein generally refers to a scribe on the wall surface, and may be provided in the form of a developing material or the like as needed.
Preferably, the fixing block is fixed outside the tail end wall of the working channel pipe; the fixing and pressing wrench is matched with the fixed block in shape.
The fixed block is communicated with a working channel pipe in a penetrating way. The fixing block is in a protruding shape, can be a cube, and is convenient for a wrench for pressing to clamp the fixing block outside to form relative fixation; the fixed pressing wrench is provided with a recess for fixing the fixing block and a holding pressing handle, the fixing block is fixed through the recess during use, and force application to the working channel pipe is realized through the handle.
Preferably, the fixed pressing spanner is T-shaped, the transverse section of the fixed pressing spanner is pressed to rotate, and the tail end of the vertical section of the fixed pressing spanner is provided with a concave cavity matched with the shape of the fixed block.
The T-shaped fixed pressing wrench is characterized in that the transverse section is used for holding a pressing handle, and the top surface of the tail end of the vertical section is provided with a recess.
Preferably, the top end of the working channel pipe is provided with a reducing section.
The reduced diameter section is specifically reduced in diameter by the outer diameter of the reduced diameter section, so that the projection of the top end of the working channel tube on the operation working position is smaller.
Preferably, the bone cement injector further comprises an injector for injecting bone cement, wherein the outer diameter of the injector tube body is smaller than the inner diameter of the working channel tube, and the length of the injector tube body is larger than that of the working channel tube.
The outlet of the injector can penetrate out of the top end of the working channel pipe, so that the bone cement injection to the designated position is realized.
Preferably, the graduated scale is arranged outside the wall of the syringe tube body along the axial direction of the syringe tube body.
Through setting up the slotted hole, for the working channel pipe provides longitudinal swing space, also restricted horizontal excessive rocking and upset simultaneously.
The scales on the working channel tube are arranged, so that the depth of the working channel tube can be conveniently observed in the operation.
Through the fixed block of rational arrangement, cooperate and press and use the spanner, can conveniently realize the application of force to the working channel pipe. Due to the design of the bolt group, the resetting operation is simpler and more convenient, and the resetting effect can be accurately predicted by controlling the force of the rotary pressurizing bolt.
The fixed pressing spanner is arranged to be T-shaped, so that the holding pressing handle can keep a certain distance from the fixed block when force is applied, and force is conveniently applied to the holding pressing handle. After the T-shaped fixed pressing spanner is disassembled, the working channel pipe is small in size, when the adjacent centrum working channel pipe is pressurized to be close to the spanner, the collision of the handle can not occur, the operation is convenient, and the working efficiency and the reset effect are improved.
The arrangement of the reducing section facilitates the top end of the working channel tube to puncture cortical bone and move in the vertebral pedicle and vertebral body, and meanwhile, the whole working channel tube can still keep certain strength.
The arrangement of the graduated scale facilitates observation of the insertion depth of the syringe tube.
The utility model discloses can carry out the basis that bone cement reinforces at the adjacent centrum of fracture centrum to the sleeve pipe of neighbouring centrum is the lever, uses the joint suddenly to be the fulcrum, exerts preceding convex moment, and the centrum of compression resets corrects the back convex deformity, can obtain comparatively ideal effect that resets.
Drawings
FIG. 1 is a schematic view of a working channel tube of the device for kyphoplasty for vertebral body fracture of the present invention;
FIG. 2 is a schematic view of the end surface of the working channel tube of the device for kyphoplasty for vertebral body fracture of the present invention;
FIG. 3 is a schematic view of a bolt set of the device for kyphoplasty of vertebral body fracture of the present invention;
FIG. 4 is a schematic view of the working channel tube and the bolt set of the kyphoplasty device for vertebral body fracture of the present invention;
FIG. 5 is a front view of the fixing and pressing wrench of the device for kyphoplasty of vertebral body fracture of the present invention;
FIG. 6 is a bottom view of the wrench for fixing and pressing the kyphoplasty device for vertebral body fracture;
FIG. 7 is a schematic view of the injector of the kyphoplasty device for vertebral body fracture of the present invention;
wherein:
1-working channel tube 11-fixing block 111-through hole
12-scale 2-bolt group 21-long bolt
22-nut 3-fixed pressing wrench 31-horizontal segment
32-vertical 321-cavity 4-syringe
41-graduated scale
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
A kyphoplasty device for vertebral fracture according to fig. 1 to 4, comprising a working channel tube 1 inserted into a vertebral body with its top end transpedicular and a bolt set 2 for tightening the space between adjacent working channel tubes 1; the tail of the working channel pipe 1 is provided with a fixed block 11, the fixed block 11 is fixed outside the tail end wall of the working channel pipe 1, a through hole 111 is arranged in the fixed block 11, and the bolt group 2 penetrates through the through hole 111 on the adjacent working channel pipe 1 and is assembled and screwed. The through hole 111 is a long round hole with the long diameter parallel to the central axis of the working channel pipe 1. The side wall of the working channel pipe 1 is provided with scales 12 along the axial direction. The bolt group 2 comprises a long bolt 21 and a nut 22 matched with the long bolt. The top end of the working channel pipe 1 is provided with a reducing section.
As shown in fig. 5 to 6, the fixing and pressing device further includes a fixing and pressing wrench 3 that matches the external shape of the square fixing block 1. The fixing and pressing wrench 3 is T-shaped, the horizontal section 31 is pressed and rotated, and the end of the vertical section 32 is provided with a recess 321 matching with the shape of the fixing block.
According to the figure 7, the bone cement injector also comprises an injector 4 for injecting bone cement, wherein the outer diameter of the body of the injector 4 is smaller than the inner diameter of the working channel tube 1, and the length of the body of the injector 4 is larger than that of the working channel tube 1. And a graduated scale 41 is arranged outside the wall of the tube body of the injector 4 along the axial direction of the tube body.
From another perspective, it can also be described that, as shown in fig. 1, 2, and 4 to 6, the working channel tube 1 is fixed with a square fixing block 11, and the fixing block 11 is disposed at the tail end of the working channel tube 1 for temporary fixing with the fixing and pressing wrench 3, so as to facilitate the transpedicular placement of the working channel tube 1 into the vertebral body. The through hole 111 is located in the center of the fixing block 11 and is an oblong hole for placing the long bolt 21. The body of the working channel tube 1 is provided with scales 12, so that the placing depth of the working channel tube 1 can be observed conveniently in an operation. The opening end (namely the top end) of the working channel tube 1 is slightly reduced compared with the tube body, so that the operation can conveniently puncture cortical bone and move in the vertebral pedicle and vertebral body. The T-shaped fixed pressing wrench 3 is convenient for placing the working channel pipe 1 for operation. The recess 321 of the fixed pressing wrench 3 is connected to the working channel tube 1 via a square fixing block 11. The recess 321 of the fixed pressing wrench 3 is a square cavity.
In the bolt set 2 shown in fig. 3, one end of the bolt set 2 is a head of a long bolt 21, and the other end is provided with a nut 22, and the long bolt 21 is provided with an external thread. The nut 22 is rotatably movable toward the head of the long bolt 21 via the external thread.
Referring to the syringe 4 shown in fig. 7, the syringe 4 has a handle holding block at the end of the tube, the tube has a graduated scale 41 to facilitate observation of the insertion depth, and the nipple of the tube is a bone cement passage. The tail end of the tube body of the injector 4 is inserted into the rod body of the push injection rod.
In this embodiment, the total length of the working channel tube 1 is 95mm, and the maximum outer diameter is 3 mm; the fixed block 11 is a cube with the side length of 10mm and is 5mm away from the top of the tail end of the working channel pipe 1. The total length of the fixed pressing wrench 3 is 55mm, and the depth of the recess 321 is 15 cm. The long bolt 21 has an overall length of 185mm and a head thickness of 5 mm.
The working process of the utility model is as follows:
step 1: the fixed pressing wrench 3 and the fixed block 11 are installed together, so that the fixed pressing wrench 3 and the working channel tube 1 form a whole, the working channel tube 1 is placed into the adjacent vertebral body of the fracture vertebra through the vertebral pedicle by puncture, and the depth of the working channel tube 1 entering the body is judged through the scale 12. The fixed pressing wrench 3 is then removed. In the same way, another working channel tube 1 is placed adjacent to another fractured vertebral body.
Step 2: the syringe 4 filled with the bone cement is put into the working channel tube 1, and the bone cement in the syringe 4 is injected into the vertebral body by pressurizing the syringe 4. The syringe 4 is pulled out.
And step 3: after cement of adjacent vertebral bodies is hardened, the long bolt 21 sequentially passes through the through holes 111 in the fixing blocks 11 on the adjacent two working channel tubes 1, the nut 22 is screwed in, the nut 22 is gradually moved towards the head of the long bolt 21 by rotating, and the generated pressurizing force enables the fractured vertebral bodies to be reset.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, and that various changes and modifications may be made, which are within the scope of the appended claims.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021921462.4U CN214017787U (en) | 2020-09-04 | 2020-09-04 | A vertebral body fracture lordoplasty device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021921462.4U CN214017787U (en) | 2020-09-04 | 2020-09-04 | A vertebral body fracture lordoplasty device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214017787U true CN214017787U (en) | 2021-08-24 |
Family
ID=77333104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021921462.4U Active CN214017787U (en) | 2020-09-04 | 2020-09-04 | A vertebral body fracture lordoplasty device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214017787U (en) |
-
2020
- 2020-09-04 CN CN202021921462.4U patent/CN214017787U/en active Active
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