CN102151170B - Universal pedicle screw pressure injection system device - Google Patents
Universal pedicle screw pressure injection system device Download PDFInfo
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- CN102151170B CN102151170B CN201110049469A CN201110049469A CN102151170B CN 102151170 B CN102151170 B CN 102151170B CN 201110049469 A CN201110049469 A CN 201110049469A CN 201110049469 A CN201110049469 A CN 201110049469A CN 102151170 B CN102151170 B CN 102151170B
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- screw
- screw thread
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- hole
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- 238000002347 injection Methods 0.000 title claims abstract description 13
- 239000007924 injection Substances 0.000 title claims abstract description 13
- 239000002639 bone cement Substances 0.000 abstract description 15
- 208000001132 Osteoporosis Diseases 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 8
- 210000000988 bone and bone Anatomy 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 206010010214 Compression fracture Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000001054 cortical effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003412 degenerative effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000001009 osteoporotic effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 108010048734 sclerotin Proteins 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Abstract
The invention discloses a universal pedicle screw pressure injection system device and relates to medical instruments. The universal pedicle screw pressure injection system device comprises a screw head (1) embedded into a sunken arc surface at the lower end of a U-shaped connecting piece (7); an internal hexagonal counter hole (6) formed at the top end of the screw head (1); a through lower U-shaped slot (5) formed at the lower end of the mid-lower part of a screw rod; an upper circular hole (3) formed on the right side of the U-shaped slot (5); and a middle elliptical hole (4) formed at the position of a screw pitch lower than the upper circular hole (3), on the left side of the U-shaped slot (5). The outer screw thread at the upper end of a connecting pipe (10) is engaged with the inner screw thread of a pressure injector barrel bottom output pipe (11), while the lower end of the connecting pipe (10) is a hexagonal pipe head inserted into the internal hexagonal counter hole (6) at the top end of the screw head (1). The outer screw thread at the lower end of a rotary handle pipe (9) is engaged with the inner screw thread of the U-shaped connecting piece (7). The outer screw thread at the upper part of an outer barrel (12) is engaged with the inner screw thread of an outer barrel cover (14). The inner screw thread of the outer barrel (12) is engaged with the outer screw thread of a vertebra rod (13). The universal pedicle screw pressure injection system device has the characteristics of high pedicle screw inner fixing stability, simple device structure, good operation operability and reduced bone cement leakage, and meets the requirement on the inner fixing of osteoporosis centrum for clinicians.
Description
Technical field
The present invention relates to medical apparatus and instruments, the universal pedicle screw system device of especially a kind of vasopressing injection.
Background technology
The world population aging makes under the osteoporosis patient more and more, follows osteoporotic vertebral body pathological changes also more and more,As: compression fracture of vertabral body, degenerative lumbar, spinal canal stenosis and centrum olisthe etc.Osteoporosis is a kind of general skeletal diseases, and it is impaired mainly to show as minimizing of osseous tissue content of mineral substances and bone trabecula, and bone fragility increases simultaneously.In spinal surgery, for the better patient of sclerotin condition, cervical arc root screw internal fixing system because have that short segment is fixed, three posts are fixing and advantage such as easy and simple to handle becomes the most frequently used spinal column way of escape internal fixation method at present.But in patients with osteoporosis operation, common pedicle screw descends to the hold of vertebral body, and its constant intensity can not satisfy the internal fixation requirement, and its consequence will cause becoming flexible, extract etc. of pedicle screw, make reset, fixing failure.Row is inserted again or revision procedure need be taken out former screw and inserted new screw, and the internal fixation effect of pedicle screw will be by further weakening.The loosening rate of LOCATION OF PEDICLE SCREW FIXATION is between 0.6%～11% according to statistics.Therefore, stability how to strengthen the osteoporosis centrum fixation of pedicle becomes the challenge that spinal surgery faces.
The reliability of pedicle screw fixation depends on the hold at bone-screw interface.In order to increase the intensity of pedicle screw fixation, many diverse ways are applied in clinical.1. increase the length and the diameter of screw; 2. utilize bone material to fill the nail road; 3. in the nail road, put into bone cement before being screwed into pedicle screw; 4. use the hollow screw that to inject bone cement.2. 1. the research display packing improve the effect of stability and not obvious, and exist pedicle of vertebral arch to break and damage the danger of vertebral body the place ahead internal organs.3. method can improve the screw fixed effect to a certain extent, but will be screwed into the bone cement risk that perhaps broken cortical bone is leaked from the nail road in the process in the face of screw.The bone cement (PMMA) that leaks exists heat of polymerization damage effect, toxicity, can not absorb, insert shortcomings such as the loosening and bone absorption of thing long term.Method 4. fixed effect is better, and the bone cement leakage problem can be effectively avoided in operation under C arm machine.Therefore, 4. method becomes the focus that osteoporosis centrum internal fixation field is clinical and scientific research is studied.
Bone cement is strengthened pedicle screw and is fixedly being obtained using comparatively widely in the osteoporosis centrum.Whole internal fixation operating system comprises: hollow pedicle screw, connecting device (being used for attachment screw and injection device) and injection device (being used to inject bone cement).There is number of drawbacks in existing internal fixation system, mainly contains that 2. 1. vertebral body stability maintenance is imprecise exists the bone cement canalis spinalis leaks and injected system is leaked problem 3. to install to make complicacy that 4. operation technique is loaded down with trivial details.Develop a kind of bone cement injected system device of avoiding above-mentioned defective, making things convenient for clinical practice, become the urgent needs of osteoporosis centrum fixation of pedicle.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structurely, flow out the side opening of characteristics 3 difformities of design and size in the screw rod middle and lower part according to bone cement, bone cement disperse scope is big, and bone-nail interface contact is extensive, the internal fixation definite effect; System sealing property is good, avoids bone cement leakage problem in the vasopressing injection process; The injection device volume is little, and simple in structure, compact, cost is low; Screw and excellent linking are convenient in the Universal-head design, and be easy to operate; Screw embedded device and bone cement injection channel are designed for integral type, have simplified the universal pedicle screw system device of vasopressing injection of operation technique program.
Technical scheme that the object of the invention adopts, this device comprises: the head of screw that screw comprises is arc surface, the center is the non-through bottom of hollow passageway; The lower end of U-shaped connector is concaved circular cambered surface, there is female thread the middle and upper part; Connecting device comprises connection tube, and said connection tube is with the handler pipe outward; Pressure injector comprises urceolus, has the vertebra bar of handle, outer cover, it is characterized in that:
Head of screw embeds in the concaved circular cambered surface of U-shaped connector lower end; There is interior hexagonal heavy stand hole on aforesaid head of screw top; There is the following U-lag hole of perforation lower end, screw rod middle and lower part, and the low spiral shell spacing L of circular port has middle slotted eye on circular port, the left side ratio on the right side in U-lag hole has;
The outlet tube female thread is connected with a joggle at the bottom of connection tube upper external screw thread and the pressure injector tube, the lower end is hexagonal tube and inserts in the head of screw top in the hexagonal heavy stand hole, and handler pipe lower end external screw thread and U-shaped connector female thread mesh;
Urceolus upper external thread and outer cover female thread engagement, urceolus female thread and the engagement of vertebra bar external screw thread.
The present invention has that pedicle screw fixation has good stability, apparatus structure is simple, operation is handling good, reduces the characteristics that bone cement leaks.Can satisfy the demand of clinician for the osteoporosis centrum internal fixation.
Description of drawings
Further specify the present invention below in conjunction with accompanying drawing.
Accompanying drawing is a sectional structure sketch map of the present invention.
Among the figure: the outer cover 15-handle L-spiral shell spacing of the interior hexagonal countersunk head platform hole 7-U shape connector 8-female thread 9-handler pipe 10-connection tube 11-outlet tube 12-urceolus 13-vertebra bar 14-of U-lag hole 6-under the slotted eye 5-among the last circular port 4-of 1--head of screw 2-screw rod 3-.
The specific embodiment
Shown in accompanying drawing, this device comprises: the head of screw 1 that screw comprises is arc surface, the center is the non-through bottom of hollow passageway; The lower end of U-shaped connector 7 is concaved circular cambered surface, there is female thread 8 middle and upper part; Connecting device comprises connection tube 10, the said connection tube 10 outer handler pipes 9 that are with; Pressure injector comprises urceolus 12, has the vertebra bar 13 of handle 15, outer cover 14, it is characterized in that:
Head of screw 1 embeds in the U-shaped connector 7 lower end concaved circular cambered surfaces; There is interior hexagonal heavy stand hole 6 on aforesaid head of screw 1 top; There is the following U-lag hole 5 of perforation lower end, screw rod middle and lower part, slotted eye 4 during circular port 3 low spiral shell spacing L have on circular port 3, the left side ratio on the right side in U-lag hole 5 has;
Urceolus 12 upper external thread and outer cover 14 female threads engagement, urceolus 12 female threads and the engagement of vertebra bar 13 external screw threads.
Also can adopt the head of screw 1 of screw and the lower end concaved circular cambered surface of U-shaped connector 7 to form an integral body.
Claims (1)
1. universal pedicle screw system device of vasopressing injection, described device comprises: screw, U-shaped connector (7), connecting device, pressure injector, the head of screw that screw comprises (1) are arc surface, the center is the non-through bottom of hollow passageway; The lower end of U-shaped connector (7) is concaved circular cambered surface, there is female thread (8) middle and upper part; Connecting device comprises connection tube (10), the outer handler pipe (9) that is with of said connection tube (10); Pressure injector comprises urceolus (12), has the vertebra bar (13) of handle (15), outer cover (14); It is characterized in that: head of screw (1) embeds in the concaved circular cambered surface of U-shaped connector (7) lower end; There is interior hexagonal heavy stand hole (6) on aforesaid head of screw (1) top; There is the following U-lag hole (5) of perforation lower end, screw rod middle and lower part, has last circular port (3), left side than the low spiral shell spacing L of last circular port (3) middle slotted eye (4) to be arranged on the right side of U-lag hole (5); Outlet tube (11) female thread is connected with a joggle at the bottom of connection tube (10) upper external screw thread and the pressure injector tube, the lower end is hexagonal tube and inserts in head of screw (1) top in the hexagonal heavy stand hole (6), and handler pipe (9) lower end external screw thread and U-shaped connector (7) female thread mesh; Urceolus (12) upper external thread and the engagement of outer cover (14) female thread, urceolus (12) female thread and the engagement of vertebra bar (13) external screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110049469A CN102151170B (en) | 2011-03-02 | 2011-03-02 | Universal pedicle screw pressure injection system device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110049469A CN102151170B (en) | 2011-03-02 | 2011-03-02 | Universal pedicle screw pressure injection system device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102151170A CN102151170A (en) | 2011-08-17 |
| CN102151170B true CN102151170B (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110049469A Expired - Fee Related CN102151170B (en) | 2011-03-02 | 2011-03-02 | Universal pedicle screw pressure injection system device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103405268A (en) * | 2013-02-26 | 2013-11-27 | 张雪松 | Pedicle screw reinforcing system adopting minimally invasive technology and high-pressure bone cement injection technology |
| CN104068926B (en) * | 2014-07-14 | 2017-01-04 | 朱敏 | A kind of circular knife chip pedicle screw and device and using method are set |
| CN105496543B (en) * | 2016-02-22 | 2020-08-07 | 南通市第一人民医院 | Fusion type bone internal nail |
| CN112386327B (en) * | 2020-11-13 | 2022-06-03 | 毕建平 | Fracture fixing system adopting negative pressure environment and bone cement single-hole injection and working method |
| CN112426218A (en) * | 2020-11-23 | 2021-03-02 | 常州集硕医疗器械有限公司 | Bone cement fixation device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4760844A (en) * | 1986-03-21 | 1988-08-02 | Ace Medical Company | Cannulated screw dye injector |
| CN2778212Y (en) * | 2005-04-13 | 2006-05-10 | 詹肇洋 | Bottling apparatus of bone mud |
| CN101940496A (en) * | 2009-07-01 | 2011-01-12 | 比德曼莫泰赫有限责任两合公司 | The equipment that uses with bone anchor with connector parts |
| CN201958990U (en) * | 2010-12-20 | 2011-09-07 | 常州市康辉医疗器械有限公司 | Hollow U-shaped nail device capable of injecting bone cement |
-
2011
- 2011-03-02 CN CN201110049469A patent/CN102151170B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4760844A (en) * | 1986-03-21 | 1988-08-02 | Ace Medical Company | Cannulated screw dye injector |
| CN2778212Y (en) * | 2005-04-13 | 2006-05-10 | 詹肇洋 | Bottling apparatus of bone mud |
| CN101940496A (en) * | 2009-07-01 | 2011-01-12 | 比德曼莫泰赫有限责任两合公司 | The equipment that uses with bone anchor with connector parts |
| CN201958990U (en) * | 2010-12-20 | 2011-09-07 | 常州市康辉医疗器械有限公司 | Hollow U-shaped nail device capable of injecting bone cement |
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| CN102151170A (en) | 2011-08-17 |
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