CN211156189U - Double-cortex pedicle screw limiting and tunneling device - Google Patents
Double-cortex pedicle screw limiting and tunneling device Download PDFInfo
- Publication number
- CN211156189U CN211156189U CN201921796662.9U CN201921796662U CN211156189U CN 211156189 U CN211156189 U CN 211156189U CN 201921796662 U CN201921796662 U CN 201921796662U CN 211156189 U CN211156189 U CN 211156189U
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- Prior art keywords
- cortex
- opening
- way
- pole
- pedicle
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000000670 limiting effect Effects 0.000 title claims description 13
- 230000005641 tunneling Effects 0.000 title description 6
- 101000720704 Homo sapiens Neuronal migration protein doublecortin Proteins 0.000 title description 2
- 102100025929 Neuronal migration protein doublecortin Human genes 0.000 title description 2
- 230000001054 cortical effect Effects 0.000 claims description 4
- 230000006378 damage Effects 0.000 abstract description 3
- 210000000056 organ Anatomy 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 210000001519 tissue Anatomy 0.000 description 4
- 208000001132 Osteoporosis Diseases 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000002639 bone cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 208000015122 neurodegenerative disease Diseases 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
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- Surgical Instruments (AREA)
Abstract
The utility model provides a spacing ware of opening a way of two cortex pedicle of vertebral arch screws, includes opening a way pole (2), its characterized in that: there is handle (1) division pole (2) rear end, and the front end has spacing awl (4), division pole (2) external diameter is 2.9mm ~3.1mm, the external diameter of spacing awl (4) is 1/2 of division pole 2 external diameter, and length is 1.9mm ~2.1mm, and the front end is blunt. The auxiliary device has the advantages of simple structure and convenient use, and can well assist the rapid and accurate placement of the double-cortical pedicle screws. The anterior important tissue and organ injury caused by too long an incision through the anterior cortex or too long a screw through the anterior of the vertebral body can be avoided.
Description
Technical Field
The utility model relates to a surgical operation apparatus relates to an instrument of opening a way that carries out two cortex pedicle of vertebral arch screw fixation to the osteoporosis patient, indicates a two spacing ware of opening a way of cortex pedicle of vertebral arch screw especially.
Background
The pedicle screw fixing technology is widely applied to the correction, fixation and reconstruction of spine fracture, spine degenerative diseases, spine deformity, spine tumor and the like at present. But the conventional screw row single cortical pedicle screw fixation for osteoporosis patients is often insufficient in holding force. At present, the holding force of the pedicle screw of the osteoporosis patient is enhanced mainly at home and abroad by methods such as bone cement strengthening, expansion pedicle screw fixing, double-cortical screw fixing and the like. The method of enhancing holding force by cement reinforcement presents the risk of cement leakage and difficulty in nail removal once infected. The expansion pedicle screw is adopted for fixing, so that the economic cost is increased, and the increase of the holding force is limited. The use of the common pedicle screws for double-cortical fixation can better enhance the holding force without increasing the economic cost. However, the common pedicle screws are mostly designed with blunt ends and non-self-tapping for safety, and only after the tunneling tool breaks through the contralateral cortex, the screws can be screwed into the contralateral cortex, but an effective tool which can just break through the contralateral cortex is not available at present, so that the screws just thread through the contralateral cortex to obtain good holding force and can not damage the tissues in front of the vertebral body.
Disclosure of Invention
To the shortcoming and the practical needs of prior art, the utility model aims to provide a spacing ware of opening a way of two cortex pedicle of vertebral arch screws. The pedicle screw fixing device aims to ensure that the pedicle screw can be just screwed into the contralateral cortex of a vertebral body to obtain good holding force through the assistance of the channel opener in the pedicle screw fixing operation and the important front tissue structure can not be damaged due to the fact that the screw penetrates out of the front cortex of the vertebral body too much.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a spacing ware of opening a way of two cortex pedicle of vertebral arch screws, including the pole of opening a way, its characterized in that: the outer diameter of the track opening rod is 2.9 mm-3.1 mm, the rear end of the track opening rod is provided with a handle, the front end of the track opening rod is provided with a limiting cone, the front end of the limiting cone is a blunt end, the outer diameter of the limiting cone is 1/2 of the outer diameter of the track opening rod, and the length of the limiting cone is 1.9 mm-2.1 mm.
Further:
the shaft of the track opening rod is provided with a length mark, so that the needle insertion depth can be conveniently identified.
The handle is a polygonal spherical handle.
The utility model has the advantages that: simple structure, convenient to use, can fine supplementary two cortex pedicle of vertebral arch screws put into fast, accurate. The anterior important tissue and organ injury caused by too long an incision through the anterior cortex or too long a screw through the anterior of the vertebral body can be avoided.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1 is a handle, 2 is an opening rod, 3 is a length mark, and 4 is a limiting cone.
Detailed Description
Referring to the drawings, the utility model relates to a spacing ware of opening a way of two cortex pedicle of vertebral arch screws, including opening a way pole 2, its characterized in that: the outer diameter of the track opening rod 2 is 2.9 mm-3.1 mm, the rear end of the track opening rod is provided with a handle 1, the front end of the track opening rod is provided with a limiting cone 4, the outer diameter of the limiting cone 4 is 1/2 of the outer diameter of the track opening rod, the length of the track opening rod is 1.9 mm-2.1 mm, and the front end of the track opening rod is a blunt end.
In the embodiment of the present invention:
the body of the channel bar 2 is provided with a length mark, so that the needle insertion depth can be conveniently identified.
The handle 1 is a polygonal spherical handle. The friction force of the grab handle can be enhanced, so that the direction can be well controlled during opening and knocking.
The limiting cone 4 has a limiting effect, the tunneling rod 2 is prevented from penetrating through the front cortex of the vertebral body, the length of the tunneling rod is 1.9 mm-2.1 mm, the thickness of the front cortex of the vertebral body is about, and the risk of damaging adjacent tissues and organs can be reduced due to the fact that the front end of the tunneling rod is blunt.
During operation: after the incision is exposed and the pedicle screw needle insertion point is positioned, a common opener punctures cortical bone of the needle insertion point to open, the common opener is used for opening a channel along the direction of the pedicle of vertebral arch, the opener is expected to be pulled out when the opener reaches the front edge of a vertebral body, the probe head is forced forwards to penetrate through residual cancellous bone after the periphery and the front of a spherical probing channel are bone, the probe head is judged to reach the front cortex of the vertebral body when the resistance is increased, and the probe is pulled out to measure the needle insertion length. Will the utility model discloses a ware of opening a way gets into the passageway along the passageway direction of opening, and it gets into the degree of depth and will reach when measuring length to tap the handle tail end with the hammer and make spacing awl just pass centrum leading edge cortex. Then, a screw which is 2mm longer than the measured length is selected for placing the nail, so that the screw just penetrates through the cortex in front of the vertebral body.
Claims (3)
1. The utility model provides a spacing ware of opening a way of two cortex pedicle of vertebral arch screws, includes opening a way pole (2), its characterized in that: there is handle (1) pole of opening a way (2) rear end, and the front end has spacing awl (4), pole of opening a way (2) external diameter is 2.9mm ~3.1mm, the external diameter of spacing awl (4) is 1/2 of pole of opening a way (2) external diameter, and length is 1.9mm ~2.1mm, and the front end is blunt.
2. The double cortical pedicle screw limiting distractor of claim 1, wherein: the body of the opening rod (2) is provided with a length mark.
3. The double cortical pedicle screw limiting distractor of claim 1, wherein: the handle (1) is a polygonal spherical handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921796662.9U CN211156189U (en) | 2019-10-24 | 2019-10-24 | Double-cortex pedicle screw limiting and tunneling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921796662.9U CN211156189U (en) | 2019-10-24 | 2019-10-24 | Double-cortex pedicle screw limiting and tunneling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211156189U true CN211156189U (en) | 2020-08-04 |
Family
ID=71814700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921796662.9U Expired - Fee Related CN211156189U (en) | 2019-10-24 | 2019-10-24 | Double-cortex pedicle screw limiting and tunneling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211156189U (en) |
-
2019
- 2019-10-24 CN CN201921796662.9U patent/CN211156189U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200804 Termination date: 20211024 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |