CN102908184A - Extension tube and connector, as well as extension tube component and pedicle screw assembly - Google Patents
Extension tube and connector, as well as extension tube component and pedicle screw assembly Download PDFInfo
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- CN102908184A CN102908184A CN2012104655624A CN201210465562A CN102908184A CN 102908184 A CN102908184 A CN 102908184A CN 2012104655624 A CN2012104655624 A CN 2012104655624A CN 201210465562 A CN201210465562 A CN 201210465562A CN 102908184 A CN102908184 A CN 102908184A
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- extension tube
- nail
- union joint
- pedicle
- tail
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Abstract
The invention discloses an extension tube, which is a flexible extension tube and arranged on the tail of a pedicle screw. In an operation process, after the pedicle screw is implanted, the pedicle screw on the same side or opposite side of the spinal column (or other bones) is arranged at an large angle, and when the extension tube has chiasma interference, medical staff can apply an external force to deform the flexible extension tube to achieve the state of mutual noninterference; and after the extension tube does not interfere mutually, the medical staff can smoothly connect a connection device to the extension tube, moves along the extension tube to realize connection with the tail of the pedicle screw, and performs compression, dilation, pressurization and other actions under a noninterference situation. Therefore, the operation difficulty and operation risk can be reduced by virtue of the flexible extension tube. The invention also discloses a connector, an extension tube component and a pedicle screw assembly.
Description
Technical field
The present invention relates to technical field of medical instruments, particularly a kind of extension tube, union joint, extension tube member and pedicle screw component.
Background technology
Along with the development of spinal biomechanics research and material science, the internal fixation of spine technology has obtained huge advance made, in spinal column degenerative disease, tumor of spine, wound, and has widely application in the operative treatment such as Spondylitis.
The internal fixation of spine technology can simply be summarised as two steps: 1) plant nail, implant pedicle nail formation at the bone piece at different vertebral bodys or fracture two ends and control anchor; 2) mounted connector is installed in the connecting devices such as steel plate, rod or steel wire on the pedicle nail, thereby by compression, strut or reverse relative position between each anchor node and carry out rectification to bone structure, then locks each anchor node and form whole interior fixed structure.
Please refer to Fig. 1-2, Fig. 1 is the scheme of installation of reposition lever and pedicle nail; Fig. 2 is the structural representation that the extension tube 3 of pedicle nail nail tail is intersected.
For the ease of realize being connected of connecting device and pedicle nail 25 in operation, the nail tail of pedicle nail 25 has extension tube 23, and as shown in Figure 1, the rivet nut of extension tube 23 and pedicle nail 25 is one-body molded.
The step of operation technique is:
1, prepares before the art.It mainly is the selection of carrying out pedicle nail 25 (length and diameter);
2, pedicle nail 25 location and nail road are prepared;
3, implant pedicle nail 25, among Fig. 1, spinal column two pleurocentrums 24 are all implanted pedicle nail 25;
4, curved rod, dress rod.Being about to reposition lever 21 (connecting device a kind of) is connected with pedicle nail 25, reposition lever 21 is provided with at least two connectors 22, connector 22 has through hole 221, during connection, the extension tube 23 of two or more pedicle nail 25 is inserted respectively in the through hole 221 of a connection piece 22, then connector 22 can constantly press down near pedicle nail 25 afterbodys along extension tube 23;
5, pressure bar, interim locking.Continue to press down connector 22, until the afterbody of pedicle nail 25 inserts in the through hole 221 of connector 22, pedicle nail 25 afterbodys are provided with external screw thread, by bolt with connector 22 temporary lockings between afterbody and bolt;
6, carry out orthopedic resetting (strutting/pressurize).After resetting, further tight a bolt, to realize final locking.
As shown in the above, extension tube 23 has played preferably guide effect, can fast and successfully reposition lever 21 be connected with pedicle nail 25 in the assurance operation process.
Yet, when carrying out such operation, often need to be in the both sides of spinal column all by reposition lever 21 maintenances, then pedicle nail 25 all need be implanted in both sides, according to spinal column position and rectification needs, both sides pedicle nail 25 may be the wide-angle state, as described in Figure 2, namely both sides pedicle nail 25 be mutually close, the ailhead of nail tail away from state; In fact, the pedicle nail 25 of the same side also may wide-angle be implanted.At this moment, chiasm interference may appear in the extension tube 23 of pedicle nail 25 nail tails, has increased operating difficulty, and surgical risk is corresponding improve also.
In view of this, how avoiding the chiasm interference of pedicle nail nail tail extension tube in the operation process, reduce operation risk, is those skilled in the art's technical issues that need to address.
Summary of the invention
For solving the problems of the technologies described above, purpose of the present invention is for providing a kind of extension tube, union joint that is arranged at pedicle nail nail tail, and extension tube member, pedicle screw component.This extension tube can be avoided chiasm interference in the operation process, thereby reduces operating difficulty, reduces operation risk.
Extension tube provided by the invention is arranged at the nail tail of pedicle nail, and extension tube is flexible extension tube.
In the operation process, behind the implantation pedicle nail, the pedicle nail that is positioned at spinal column (also can be other bone pieces) homonymy or heteropleural is the wide-angle setting, and when causing extension tube chiasm interference to occur, the medical worker can impose external force, and make flexible extension tube distortion and reach the state of mutually noninterfere.After the extension tube mutually noninterfere, the medical worker can successfully be connected to connecting device on the extension tube, and then moves to realize to be connected with the afterbody of pedicle nail along extension tube, and can be in the situation that the action such as mutually noninterfere is carried out pressure bar, strutted, pressurization.As seen, flexible extension tube has reduced the difficulty of operation, has reduced the risk of operation.
The present invention also provides the union joint of a kind of above-mentioned extension tube and pedicle nail nail tail, and the one end is for inserting the first external thread section of pedicle nail nail tail internal thread hole, and the other end of described union joint is crimped in the tube chamber of described extension tube one end.
Connect first end and be threaded with the nail tail of pedicle nail, be easy to realize, and the other end of union joint is crimped in the extension tube, to realize interference fit, also be easy to realize.Therefore the union joint of this structure has realized that easily flexible extension tube is connected connection with pedicle nail, and union joint is simple in structure, is easy to processing.
Preferably, an end that is connected with described extension tube on the described union joint is the second external thread section.
Preferably, described union joint has axially extending bore.
The present invention also provides a kind of extension tube member, comprises extension tube, and described extension tube is flexible extension tube; Also comprise be used to the union joint that connects described extension tube and pedicle nail nail tail, the one end is for inserting the first external thread section of pedicle nail nail tail internal thread hole, and the other end of described union joint is crimped in the tube chamber of described extension tube one end.
Because above-mentioned extension tube has above-mentioned technique effect, the extension tube member with this extension tube also has identical technique effect.
The present invention also provides a kind of pedicle screw component, comprises pedicle nail and is connected in the extension tube that described pedicle nail is followed closely tail, and described extension tube is extension tube described above; Also comprise union joint, the nail tail of described pedicle nail has internal thread hole, and an end of described union joint is the first external thread section that cooperates with described internal thread hole, and the other end of described union joint is crimped in the tube chamber of described extension tube one end.
Pedicle screw component has comprised above-mentioned flexible extension tube, because above-mentioned extension tube has above-mentioned technique effect, the pedicle screw component with this extension tube also has identical technique effect.
Preferably, an end that is connected with described extension tube on the described union joint is the second external thread section, and described the second external thread section is crimped on an end of described extension tube.
Preferably, described pedicle nail has axial through bore, and described union joint has axially extending bore; The tube chamber of described axial through bore, described axially extending bore, described extension tube, the coaxial setting of three is in order to inject bone cement.
Description of drawings
Fig. 1 is the scheme of installation of reposition lever and pedicle nail;
Fig. 2 is the structural representation that the extension tube of pedicle nail nail tail is intersected;
Fig. 3 is the structural representation of a kind of specific embodiment of pedicle screw component provided by the present invention;
Fig. 4 is the structural representation that the extension tube of pedicle screw component among Fig. 3 is in the elastic bending state;
Fig. 5 is after pedicle nail is implanted, the structural representation of extension tube chiasm interference;
Fig. 6 is the structural representation of mutually noninterfere after the extension tube generation strain among Fig. 5;
Fig. 7 is the structural representation of a kind of specific embodiment of union joint provided by the present invention;
Fig. 8 is the structural representation of extension tube member;
Fig. 9 is extension tube, union joint, and the assembling schematic diagram of pedicle nail.
Among Fig. 1-2:
21 reposition levers, 22 connectors, 221 through holes, 23 extension tubes, 24 vertebral bodys, 25 pedicle nails;
Among Fig. 3-9:
11 extension tubes, 12 pedicle nails, 13 union joints, 131 first external thread sections, 132 second external thread sections, 121 nail tails
The specific embodiment
In order to make those skilled in the art understand better technical scheme of the present invention, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 3-6, Fig. 3 is the structural representation of a kind of specific embodiment of pedicle screw component provided by the present invention; Fig. 4 is the structural representation that the extension tube of pedicle screw component among Fig. 3 is in the elastic bending state; Fig. 5 is after pedicle nail is implanted, the structural representation of extension tube chiasm interference; Fig. 6 is the structural representation of mutually noninterfere after the extension tube generation strain among Fig. 5.
Pedicle screw component among this embodiment comprises pedicle nail 12 and is connected in the extension tube 11 that pedicle nail 12 is followed closely tails 121.As shown in Figure 3, the ailhead implant into body of pedicle nail 12, nail tail 121 is provided with extension tube 11.Can the description partly of reference background technology understand, extension tube 11 can play guide effect for connecting device (such as reposition lever) and being connected of pedicle nail 12.Extension tube 11 in the present embodiment is flexible extension tube, and namely this extension tube 11 can elastic bending, thereby can do suitable distortion under external force, as shown in Figure 4.
In the operation process, after implanting pedicle nail 12, the pedicle nail 12 that is positioned at spinal column (also can be other bone pieces) homonymy or heteropleural is the wide-angle setting, and when causing extension tube 11 chiasm interference to occur, as shown in Figure 5, the medical worker can impose external force, makes extension tube 11 distortion and reaches the state of mutually noninterfere, as shown in Figure 6.After extension tube 11 mutually noninterferes, the medical worker can successfully be connected to connecting device on the extension tube 11, and then move to realize that along extension tube 11 afterbody with pedicle nail 12 is connected, and can be in the situation that the action such as mutually noninterfere is carried out pressure bar, strutted, pressurization.As seen, flexible extension tube 11 has reduced the difficulty of operation, has reduced the risk of operation.For ease of understanding and succinct the description, this paper is combined in extension tube 11 in the pedicle screw component and describes, and beneficial effect no longer repeats to discuss.
This pedicle screw component comprises the union joint 13 that connects extension tube 11 and pedicle nail 12 nail tails 121.As shown in Figure 7, Fig. 7 is the structural representation of a kind of specific embodiment of union joint provided by the present invention; Fig. 8 is the structural representation of extension tube member; Fig. 9 is extension tube, union joint, and the assembling schematic diagram of pedicle nail.
The nail tail 121 of pedicle nail 12 has internal thread hole, and an end of union joint 13 is the first external thread section 131 that cooperates with internal thread hole, and the other end of union joint 13 is crimped in the tube chamber of extension tube 11 1 ends, namely fixes with extension tube 11 interference fit.Before the operation, the other end of union joint 13 can be crimped in the end of extension tube 11, namely be crimped in the tube chamber, thereby be fixed together with extension tube 11, form the extension tube member, as shown in Figure 8; Then, the union joint 13 that is connected with extension tube 11 is connected with pedicle nail 12, the nail tail 121 of pedicle nail 12 has internal thread hole, the first external thread section 131 is tightened in the internal thread hole, thereby has realized the assembling of pedicle screw component.
Because extension tube 11 is flexible, can't be as doing integral type design (being processed by the titanium alloy material one) with pedicle nail 12 in the background technology; In addition, the nail tail 121 of pedicle nail 12 is when locking reposition lever class connecting device, the locking member bolt need be tightened in and have externally threaded nail tail 121, in order not interfere the installation of bolt, when extension tube 11 directly is installed on nail tail 121, preferably be embedded in the inside of nail tail 121, flexible extension tube 11 interior stud tails 121 fixedly have difficulties.Extension tube 11 is installed to nail tail 121 therefore design special union joint 13, union joint 13 can adopt metalwork to process, the one end is threaded with the nail tail 121 of pedicle nail 12, be easy to realize, and the other end of union joint 13 is crimped in the extension tube 11, to realize interference fit, also be easy to realize.Therefore the union joint 13 of this structure has been realized the connection that flexible extension tube 11 is connected with pedicle nail easily, and union joint 13 is simple in structure, is easy to processing.
Further, an end that is connected with extension tube 11 on the union joint 13 is the second external thread section 132, and namely the two ends of union joint 13 are external thread section.After the end that union joint 13 is connected with connection tube is processed as external thread section, when entering in the tube chamber of extension tube 11 by the frock crimping, under pressure, the inwall of extension tube 11 ends can produce distortion, and produce the lines match with the second external thread section 132 screw threads, to strengthen the crimping effect, guarantee that extension tube 11 can not break away from union joint 13 in operation process.
For the various embodiments described above, union joint 13 can have axially extending bore, and namely union joint 13 is hollow structure.Therewith accordingly, pedicle nail 12 also is hollow nail, and namely pedicle nail 12 has axial through bore.The tube chamber of axial through bore, axially extending bore, extension tube 11, the three can coaxially arrange, when needs injection bone cement (generally is adhesive or the bone filler that is made of powder and the two components of liquor, be used for being adhesively fixed of artificial joint, the filling that bone is damaged, the fixing and medicine controlled release carrier of fracture etc.) time, the medical worker can directly inject bone cement in the extension tube 11 by syringe, and enters in the vertebral body (or other bone pieces) along the axially extending bore of union joint 13, the axial through bore of pedicle nail 12.As seen, the pedicle nail 12 of this structure, union joint 13, extension tube 11 have realized the injection of bone cement simply.And, because extension tube 11 be flexible design, use injector to inject and when being subject to spatial limitation, only need angle, the position of adjustment extension tube 11 to get final product, so that syringe can use in than the large space scope.
In addition, the tube chamber of axial through bore, axially extending bore, extension tube 11 when the three can coaxially arrange, also makes things convenient for pedicle nail 12 to insert the desired position.When determining to need to insert the position of pedicle nail 12, can at first positioning needle be inserted this position, then, positioning needle is positioned at the tube chamber that part on the skin can sequentially be inserted the axial through bore of pedicle screw component, axially extending bore, extension tube 11, then pedicle screw component inserts body gradually along positioning needle, determines the position until the lower end rivet nut of pedicle nail 12 is inserted.
Above to a kind of extension tube provided by the present invention, union joint, and extension tube member, pedicle screw component all are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (8)
1. extension tube is arranged at the nail tail of pedicle nail, it is characterized in that, described extension tube (11) is flexible extension tube.
2. one kind connects the union joint that extension tube claimed in claim 1 and pedicle nail are followed closely tail, it is characterized in that, the one end is for inserting first external thread section (131) of pedicle nail (12) nail tail (121) internal thread hole, and the other end of described union joint (13) can be crimped in the tube chamber of described extension tube (11) one ends.
3. union joint as claimed in claim 2 is characterized in that, the upper end that is connected with described extension tube (11) of described union joint (13) is the second external thread section (132).
4. union joint as claimed in claim 2 or claim 3 is characterized in that, described union joint (13) has axially extending bore.
5. an extension tube member comprises extension tube (11), it is characterized in that, described extension tube (11) is flexible extension tube; Also comprise be used to the union joint (13) that connects described extension tube (11) and pedicle nail nail tail (121), the one end is for inserting first external thread section (131) of pedicle nail (12) nail tail internal thread hole, and the other end of described union joint (13) is crimped in the tube chamber of described extension tube (11) one ends.
6. a pedicle screw component comprises pedicle nail (11) and is connected in the extension tube (11) that described pedicle nail (12) is followed closely tail, and it is characterized in that, described extension tube (11) is extension tube claimed in claim 1 (11); Also comprise union joint (13), the nail tail of described pedicle nail (12) has internal thread hole, one end of described union joint (13) is the first external thread section (131) that cooperates with described internal thread hole, and the other end of described union joint (13) is crimped in the tube chamber of described extension tube (11) one ends.
7. pedicle screw component as claimed in claim 6, it is characterized in that, the upper end that is connected with described extension tube (11) of described union joint (13) is the second external thread section (132), and described the second external thread section (132) is crimped on an end of described extension tube (11).
8. such as claim 6 or 7 described pedicle screw components, it is characterized in that, described pedicle nail (12) has axial through bore, and described union joint (13) has axially extending bore; The tube chamber of described axial through bore, described axially extending bore, described extension tube, the coaxial setting of three is in order to inject bone cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210465562.4A CN102908184B (en) | 2012-11-16 | 2012-11-16 | Pedicle screw assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210465562.4A CN102908184B (en) | 2012-11-16 | 2012-11-16 | Pedicle screw assembly |
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| Publication Number | Publication Date |
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| CN102908184A true CN102908184A (en) | 2013-02-06 |
| CN102908184B CN102908184B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210465562.4A Active CN102908184B (en) | 2012-11-16 | 2012-11-16 | Pedicle screw assembly |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016000229A1 (en) * | 2014-07-02 | 2016-01-07 | Yue Zhou | Extension piece at nail end of pedicle nail, dilator and push rod reset lever |
| WO2016024887A1 (en) * | 2014-08-14 | 2016-02-18 | Общество С Ограниченной Ответственностью "Институт Медицинской Информатики" (Ооо "Ими") | Device for percutaneous transpedicular spine stabilization |
| CN113384335A (en) * | 2021-05-24 | 2021-09-14 | 上海三友医疗器械股份有限公司 | Eccentric screw and spinal correction fixing system |
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| CN202892069U (en) * | 2012-11-16 | 2013-04-24 | 上海三友医疗器械有限公司 | Extension tube and connector and extension tube component and pedicle screw assembly |
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| US6235028B1 (en) * | 2000-02-14 | 2001-05-22 | Sdgi Holdings, Inc. | Surgical guide rod |
| US20030105460A1 (en) * | 2000-03-15 | 2003-06-05 | Dennis Crandall | Multidirectional pivoting bone screw and fixation system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016000229A1 (en) * | 2014-07-02 | 2016-01-07 | Yue Zhou | Extension piece at nail end of pedicle nail, dilator and push rod reset lever |
| WO2016024887A1 (en) * | 2014-08-14 | 2016-02-18 | Общество С Ограниченной Ответственностью "Институт Медицинской Информатики" (Ооо "Ими") | Device for percutaneous transpedicular spine stabilization |
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| CN113384335A (en) * | 2021-05-24 | 2021-09-14 | 上海三友医疗器械股份有限公司 | Eccentric screw and spinal correction fixing system |
| CN113384335B (en) * | 2021-05-24 | 2023-03-31 | 上海三友医疗器械股份有限公司 | Eccentric screw and spinal correction fixing system |
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| CN102908184B (en) | 2015-06-17 |
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Address after: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee after: Shanghai Sanyou medical equipment Limited by Share Ltd Address before: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee before: Shanghai Sanyou Medical Devices Co., Ltd. |