CN211750015U - A go up nail spanner when being used for unipolar pedicle of vertebral arch screw to implant - Google Patents
A go up nail spanner when being used for unipolar pedicle of vertebral arch screw to implant Download PDFInfo
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- CN211750015U CN211750015U CN201922466166.3U CN201922466166U CN211750015U CN 211750015 U CN211750015 U CN 211750015U CN 201922466166 U CN201922466166 U CN 201922466166U CN 211750015 U CN211750015 U CN 211750015U
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Abstract
The utility model discloses a go up nail spanner when being used for unipolar pedicle of vertebral arch screw to implant. The spanner comprises a screw feeding rod and a connecting rod, wherein the connecting rod is movably positioned in the screw feeding rod, one end of the connecting rod is provided with an operating head, the screw feeding rod is provided with an external thread at one end corresponding to the operating head, the structure of the spanner is characterized in that the screw feeding rod is provided with a rotating device, the rotating device comprises a rotating block and a guide rail block, the other end of the screw feeding rod corresponding to the operating head is provided with a steel ball hole and a guide rail groove, the rotating block is sleeved at the end of the screw feeding rod, the rotating block is provided with a through positioning hole and a guide rail hole, the positioning hole is sequentially provided with a steel ball, a spring and a screw from inside to outside, the steel ball is positioned in the steel ball hole, and the screw presses; the guide rail block is fixed in the guide rail hole and matched with the guide rail groove, and the guide rail block can move along the guide rail groove. The utility model has the advantages of accurate and stable nail feeding, convenient use, reduced operation risk and improved operation efficiency.
Description
Technical Field
The utility model relates to an orthopedic surgical instrument, in particular to a nail-feeding wrench used for implanting a single axial vertebra arch root screw in a spinal internal fixation system.
Background
The pedicle screw is used in the internal fixation operation of the spine, and mainly plays a role in restoring the sequence of the spine and maintaining the stability of the spine. For patients with spinal instability or spinal fracture, the internal fixation of the pedicle screws can play roles in resetting and maintaining the stability of the spinal; the patient with scoliosis or kyphosis can be corrected; for degenerative diseases of the spine, the stability of the spine can be maintained after the operation, and the fusion of bones is promoted.
When fixing the pedicle screws on the vertebral column, special screw-up wrenches are needed to be used for installing the pedicle screws into vertebral bodies to a preset depth. Under the cooperation of a special nail-feeding wrench, the operation time can be shortened, the pain of a patient can be relieved, and the infection probability of an operation wound can be reduced, so that the key for ensuring the safety of the patient and improving the success rate of the operation is realized. Pedicle screws in the spinal internal fixation system can be divided into six types, namely single-shaft short-tail screws, single-shaft long-tail screws, universal short-tail screws, universal long-tail screws, hollow single-shaft long-tail screws and universal long-tail screws according to the types of spines. According to different types of pedicle screws, six different screw-up wrenches are matched to complete the implantation of the pedicle screws.
The existing spanner is operated in a complex three-dimensional space when being implanted into a pedicle screw, so that the positioning failure is easily caused, and higher difficulty and risk are realized. If the screw is implanted wrongly, the internal fixation frame is unstable in the early stage, and false joint formation can be caused in the later stage. Therefore, in the process of the internal fixation operation of the vertebral column, the key for ensuring the accurate implantation of the pedicle screws is the success of the internal fixation operation of the whole vertebral column, and the selected implantation surgical instrument is particularly important.
Disclosure of Invention
The utility model aims to solve the technical problem that a go up nail spanner when being used for unipolar pedicle of vertebral arch screw that goes up that nail is accurate stable, convenient to use, reduces the operation risk, improves operation efficiency is provided.
The utility model provides a technical scheme that above-mentioned problem adopted is: the spanner comprises a screw feeding rod and a connecting rod, wherein the connecting rod is movably positioned in the screw feeding rod, one end of the connecting rod is provided with an operating head, the screw feeding rod is provided with an external thread at one end corresponding to the operating head, the structure of the spanner is characterized in that the screw feeding rod is provided with a rotating device, the rotating device comprises a rotating block and a guide rail block, the other end of the screw feeding rod corresponding to the operating head is provided with a steel ball hole and a guide rail groove, the rotating block is sleeved at the end of the screw feeding rod, the rotating block is provided with a through positioning hole and a guide rail hole, the positioning hole is sequentially provided with a steel ball, a spring and a screw from inside to outside, the steel ball is positioned in the steel ball hole, and the screw presses; the guide rail block is fixed in the guide rail hole and matched with the guide rail groove, and the guide rail block can move along the guide rail groove.
Go up the external diameter that the nail pole corresponds operating head one end and is less than or equal to the widest department of the contact surface of operating head and last nail pole.
The other end of connecting rod is equipped with the ready-packaged joint.
The utility model discloses still include movable handle, movable handle movably is located the middle part of last nail pole.
The guide rail block is welded and fixed in the guide rail hole.
The quick-assembling joint passes through flat top hexagonal screw fixation on the connecting rod.
Compared with the prior art, the utility model, following beneficial effect has: 1. the upper screw rod of the wrench is provided with the rotating device, the rotating device can be connected with the upper screw rod into a whole and can also be separated from the upper screw rod, the rotating device is connected with the upper screw rod into a whole before screw feeding, the upper screw rod can be driven to rotate together when the rotating device is rotated, so that the upper screw rod and the pedicle screw are fixed, the rotating device is separated from the upper screw rod when screw feeding is performed, the quick-assembly handle is rotated, the upper screw rod is driven to rotate together by the quick-assembly handle, so that the pedicle screw is screwed into a vertebral body to a preset depth, the design can avoid misoperation caused by the fact that the rotating block is accidentally collided with the rotating block when the screw is fed, the rotating block can drive the upper screw rod to rotate so that loosening and slipping are generated between the upper screw rod and the pedicle screw, and the effects of accurately and stably feeding the screw, convenience in use, reduction of surgical risks and improvement of; 2. the external diameter that the nail pole corresponds operating head one end on this spanner is less than or equal to the widest department of the contact surface of operating head and last nail pole, after the external screw thread screw in of last nail pole is in the U-shaped inslot of pedicle of vertebral arch screw like this, the operating head card is at the U-shaped inslot, the one end that the nail pole corresponds the operating head supports and leans on the operating head, die the operating head, make at last nail in-process, go up and can't rotate or remove each other between nail pole and the connecting rod again, can only rotate in step or remove, when rotating the fast-assembling handle, when the nail pole rotated together by the fast-assembling handle drive, the connecting rod also followed the nail pole and rotated together, avoid connecting rod and last nail pole reversal, lead to producing not hard up the slippage between nail pole and the pedicle of vertebral arch screw, further play accurate stable nail, high durability and convenient use. 3. The wrench has simple structural design, reduces the weight of the wrench, and is a better choice for clinical operations.
Drawings
Fig. 1 is a front view of embodiment 1 of the present invention.
Fig. 2 is a left side view of embodiment 1 of the present invention.
Fig. 3 is a right side view of embodiment 1 of the present invention.
Fig. 4 is a bottom view of embodiment 1 of the present invention.
Fig. 5 is a plan view of embodiment 1 of the present invention.
Fig. 6 is a perspective view of embodiment 1 of the present invention.
Fig. 7 is a schematic structural view of a rotation block in embodiment 1 of the present invention.
Fig. 8 is a sectional view a-a of fig. 7.
Fig. 9 is a schematic structural view of the upper nail rod in embodiment 1 of the present invention.
Fig. 10 is a sectional view B-B of fig. 9.
Fig. 11 is a cross-sectional view of embodiment 1 of the present invention (when the rotary block is connected to the upper nail rod).
Fig. 12 is a cross-sectional view of embodiment 1 of the present invention (when the rotary block is separated from the upper nail shank).
Fig. 13 is a schematic structural view of the short-tailed pedicle screw of single-shaft according to embodiment 1 of the present invention.
Fig. 14 is a perspective view of embodiment 2 of the present invention.
Fig. 15 is a cross-sectional view of embodiment 2 of the present invention (when the rotary block is connected to the upper nail rod).
Fig. 16 is a cross-sectional view of embodiment 2 of the present invention (when the rotary block is separated from the upper nail shank).
Fig. 17 is a schematic structural view of the pedicle screw of the present invention used in combination with a single-shaft long-tail pedicle screw in embodiment 2.
Detailed Description
Example 1:
this embodiment is used for a uni-axial short-tailed pedicle screw.
Referring to fig. 1-12, the present embodiment includes an upper nail rod 2 and a connecting rod 3, the connecting rod 3 is movably located in the upper nail rod 2, and the connecting rod 3 and the upper nail rod 2 can rotate or move with each other. One end of the connecting rod 3 is provided with an operating head 12, and the shape of the operating head 12 is matched with the nail head of the pedicle screw 18; the other end of connecting rod 3 is equipped with quick-assembling joint 1, and quick-assembling joint 1 passes through flat-topped hexagonal screw 6 to be fixed on connecting rod 3, and quick-assembling joint 1 is used for installing fast-assembling handle 17. The upper screw rod 2 is provided with an external thread 15 at one end corresponding to the operating head 12, the external thread 15 is matched with an internal thread in a U-shaped groove of the pedicle screw 18 and is used for screwing the upper screw rod 2 into the U-shaped groove of the pedicle screw 18 so as to be fixed with the pedicle screw 18; and the outer diameter of the end of the upper nail rod 2 corresponding to the operating head 12 is less than or equal to the widest part of the contact surface of the operating head 12 and the upper nail rod 2.
The upper nail rod 2 is provided with a rotating device, the rotating device comprises a rotating block 5 and a guide rail block 10, the other end of the upper nail rod 2, corresponding to the operating head 12, is provided with a steel ball hole 13 and a guide rail groove 11, and the rotating block 5 is sleeved at the end of the upper nail rod 2. The rotating block 5 is provided with a through positioning hole 14 and a guide rail hole 16, the positioning hole 14 is sequentially provided with a steel ball 9, a spring 8 and a screw 7 from inside to outside, the steel ball 9 is positioned in the steel ball hole 13, and the screw 7 presses the steel ball 9 on the connecting rod 3 through the spring 8. The guide rail block 10 is welded and fixed in the guide rail hole 16, the guide rail block 10 is matched with the guide rail groove 11, the guide rail block 10 can move along the guide rail groove 11, and the guide rail block 10 plays a role in guiding and positioning, so that the rotating block 5 cannot rotate around the upper nail rod 2 and can only move along the upper nail rod 2 within the length range of the guide rail groove 11. As shown in fig. 11, when the steel ball 9 is pressed on the connecting rod 3 by the spring 8, the rotating block 5 and the upper nail rod 2 are connected into a whole, and at the moment, the rotating block 5 is rotated, and the rotating block 5 drives the upper nail rod 2 to rotate together; as shown in figure 12, when the rotating block 5 is pulled out towards the direction of the quick connector 1, the steel ball 9 is separated from the steel ball hole 13 of the upper nail rod 2 under the action of the spring 8, the rotating block 5 is separated from the upper nail rod 2, and at the moment, the rotating block 5 is rotated, and the rotating block 5 cannot drive the upper nail rod 2 to rotate together.
The embodiment also comprises a movable handle 4, the movable handle 4 is movably positioned in the middle of the upper nail rod 2, and the movable handle 4 and the upper nail rod 2 can rotate or move mutually.
The working process is as follows:
before the nailing is started, the rotating block 5 and the nailing rod 2 are in a state of being connected into a whole, as shown in fig. 11. Firstly, the operating head 11 of the connecting rod 3 is placed into the U-shaped groove of the pedicle screw 18 to clamp the pedicle screw 18, then the movable handle 4 is held by one hand, the rotating block 5 is rotated by the other hand, the rotating block 5 drives the upper screw rod 2 to rotate, so that the external thread 15 of the upper screw rod 2 is screwed into the internal thread in the U-shaped groove of the pedicle screw 18, and the upper screw rod 2 and the pedicle screw 18 are fixed together as shown in fig. 13. At this time, because the outer diameter of the end of the upper nail rod 2 corresponding to the operating head 12 is less than or equal to the widest part of the contact surface between the operating head 12 and the upper nail rod 2, the end of the upper nail rod 2 is abutted against the operating head 12 to push the operating head 12 to be dead, so that in the next operating step, the upper nail rod 2 and the connecting rod 3 can not rotate or move mutually any more and only can rotate or move synchronously.
Then, a quick-assembling handle 17 is installed on the quick-assembling joint 1, and then the rotating block 5 is pulled out in the direction of the quick-assembling joint 1, so that the steel ball 9 is disengaged from the steel ball hole 13, and the rotating block 5 is separated from the upper nail rod 2, as shown in fig. 12.
And starting to screw, holding the movable handle 4 by one hand, rotating the quick-mounting handle 1 by the other hand, driving the upper screw rod 2 and the connecting rod 3 to rotate together by the quick-mounting handle 1, and screwing the pedicle screw 18 into the vertebral body to a preset depth. The rotating block 5 and the upper nail rod 2 are separated at the moment, and the design can avoid misoperation caused by the fact that the rotating block 5 is collided carelessly during nailing. When the pedicle screw is screwed, the rotating block 5 is still connected with the upper screw rod 2 into a whole, and the rotating block 5 drives the upper screw rod 2 to rotate by misoperation, so that the external thread 15 and the pedicle screw 18 are loosened and slipped; because turning block 5 and last nail pole 2 are in the separation state this moment, even if collide turning block 5 carelessly, turning block 5 can not drive and go up nail pole 2 and rotate, has played the effect of accurate stable nail, reduction operation risk, improvement operation efficiency.
After the screw is screwed, the rotating block 5 is pushed towards the operating head 11 to enable the steel ball 9 to enter the steel ball hole 13, the rotating block 5 and the screw rod 2 are connected into a whole again, at the moment, the rotating block 5 is rotated in the opposite direction, the external thread 15 of the screw rod 2 is screwed out of the U-shaped groove of the pedicle screw, and the screw placing wrench is withdrawn.
Example 2:
this embodiment is used for a single-axis long-tailed pedicle screw.
Referring to fig. 14 to 17, the present embodiment differs from embodiment 1 in that: the distance of the external thread 15 on the upper nail rod 2 from the operating head 11 is longer than that of the embodiment 1. Other structures and using methods are the same as those of embodiment 1, and are not described again.
Claims (6)
1. The utility model provides an go up nail spanner when implanting for unipolar pedicle of vertebral arch screw, includes and follows closely pole (2) and connecting rod (3), connecting rod (3) movably is located and follows closely pole (2), and the one end of connecting rod (3) is equipped with operating head (12), goes up nail pole (2) and is equipped with external screw thread (15), characterized by at its one end that corresponds operating head (12): the nail feeding device is characterized in that a rotating device is arranged on the nail feeding rod (2), the rotating device comprises a rotating block (5) and a guide rail block (10), the other end, corresponding to the operating head (12), of the nail feeding rod (2) is provided with a steel ball hole (13) and a guide rail groove (11), the rotating block (5) is sleeved at the end of the nail feeding rod (2), the rotating block (5) is provided with a through positioning hole (14) and a guide rail hole (16), the positioning hole (14) is sequentially provided with a steel ball (9), a spring (8) and a screw (7) from inside to outside, the steel ball (9) is located in the steel ball hole (13), and the screw (7) presses the steel ball (9) on the connecting rod (3) through the spring (8); the guide rail block (10) is fixed in the guide rail hole (16), the guide rail block (10) is matched with the guide rail groove (11), and the guide rail block (10) can move along the guide rail groove (11).
2. The screw driver for implanting a uniaxial pedicle screw as claimed in claim 1, wherein: the outer diameter of one end, corresponding to the operating head (12), of the upper nail rod (2) is smaller than or equal to the widest part of the contact surface between the operating head (12) and the upper nail rod (2).
3. The screw driver for implanting a uniaxial pedicle screw as claimed in claim 1, wherein: the other end of the connecting rod (3) is provided with a quick coupler (1).
4. The screw driver for implanting a uniaxial pedicle screw as claimed in claim 1, wherein: the nail-fixing device also comprises a movable handle (4), wherein the movable handle (4) is movably positioned in the middle of the upper nail rod (2).
5. The screw driver for implanting a uniaxial pedicle screw as claimed in claim 1, wherein: the guide rail block (10) is welded and fixed in the guide rail hole (16).
6. The screw driver for implanting a monoaxial pedicle screw as claimed in claim 3, wherein: the quick coupler (1) is fixed on the connecting rod (3) through a flat-top hexagonal screw (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922466166.3U CN211750015U (en) | 2019-12-31 | 2019-12-31 | A go up nail spanner when being used for unipolar pedicle of vertebral arch screw to implant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922466166.3U CN211750015U (en) | 2019-12-31 | 2019-12-31 | A go up nail spanner when being used for unipolar pedicle of vertebral arch screw to implant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211750015U true CN211750015U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922466166.3U Active CN211750015U (en) | 2019-12-31 | 2019-12-31 | A go up nail spanner when being used for unipolar pedicle of vertebral arch screw to implant |
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| CN (1) | CN211750015U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111012473A (en) * | 2019-12-31 | 2020-04-17 | 浙江康慈医疗科技有限公司 | A go up nail spanner when being used for unipolar pedicle of vertebral arch screw to implant |
-
2019
- 2019-12-31 CN CN201922466166.3U patent/CN211750015U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111012473A (en) * | 2019-12-31 | 2020-04-17 | 浙江康慈医疗科技有限公司 | A go up nail spanner when being used for unipolar pedicle of vertebral arch screw to implant |
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