CN201346238Y - Pouring device used for pourable screw for pedicle of vertebral arch - Google Patents
Pouring device used for pourable screw for pedicle of vertebral arch Download PDFInfo
- Publication number
- CN201346238Y CN201346238Y CNU2009200383291U CN200920038329U CN201346238Y CN 201346238 Y CN201346238 Y CN 201346238Y CN U2009200383291 U CNU2009200383291 U CN U2009200383291U CN 200920038329 U CN200920038329 U CN 200920038329U CN 201346238 Y CN201346238 Y CN 201346238Y
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- push rod
- bolus tube
- pedicle
- screw
- casting
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Abstract
The utility model provides a pouring device used for a pourable screw for pedicle of vertebral arch. The pouring device comprises an injector and a push rod, wherein, the injector has a through-hole structure, a sealing connection structure combined with the hollow wall at the tail end of the screw for pedicle of vertebral arch is arranged at one end of the through-hole structure, and the other end thereof is an injection port; the diameter of the push rod is smaller that that of an injection port of the push-perfusion cylinder; and the push rod is in tight fit with the injector; a convex stepped structure is arranged at the injection port end of the injector; and the push rod adopts a T-shaped structure. The perfusion device enhances the holding force of the injector, facilitates the pressurization on the whole pouring device and the operation.
Description
Technical field
This utility model relates to a kind of surgical instruments, is specifically related to a kind of device for casting that implants such as bone cement is poured into hollow structure to the screw that uses in the pedicle screw implant surgery.
Background technology
In spinal surgery, use the history in existing more than 50 year of internal fixation technology of pedicle screw.The implant surgery of pedicle screw, mainly comprise fixedly two procedures of preparation of nail road and pedicle screw, clinical for many years surface, even with correct position and direction pedicle screw, screw loosening still can occur, extract or phenomenon such as fracture, especially senile and secondary osteoporosis patient, the ratio that this class situation occurs is higher, this is because the bond strength of screw-bone interface is caused inadequately, to cause fixing failure when above-mentioned situation occurring, need second operation, this will be once more brings mentally and sensual misery to the patient.
In order to increase the screw constant intensity, what generally adopt in the prior art is the method for perfusion bone cement in the nail road, the nail body that is about to pedicle screw is arranged to hollow structure, and offer the bleed opening that is communicated with hollow structure on one's body at nail, utilize device for casting implants such as bone cement to be injected the hollow structure of following closely in the body again, bone cement is filled in the space, nail road of bleed opening outside the nail body, make the bone cement in following closely the interior bone cement of body and following closely the road form whole a connection, thereby increased screw constant intensity and stability.
Existing device for casting mainly is made up of bolus tube and push rod, and described bolus tube is the smooth through-hole structure of an appearance, and the one end is provided with the structure that is tightly connected that cooperates with the hollow wall of pedicle screw end, and the other end is an inlet; The diameter of described push rod is less than the diameter of the inlet of bolus tube, and push rod and bolus tube closely cooperate.
Yet, because the implant of injecting generally has bigger viscosity, bone cement particularly can solidify in time and gradually, thereby needs to apply big pressure in the process of implant being poured into to the pedicle screw, and existing bolus tube appearance is smooth smooth, hold is not enough, thereby is difficult to the application of force and produces big pressure, finds in clinical trial, the device for casting of said structure often is difficult to implant is injected in the screw, has caused difficulty to operation.On the other hand,, medical apparatus and instruments is had higher requirement, therefore do not allow to adopt rough power to exert pressure, also limited the application of above-mentioned device for casting because the pedicle screw implant surgery is very meticulous.Therefore, develop the device for casting of a kind of application of force convenience, easy operating, positive effect with reality.
Summary of the invention
But the purpose of this utility model provides a kind of device for casting that is used for perfusion cervical pedicle bolt, to have made things convenient for exerting pressure of device for casting, is convenient to operation technique.
To achieve the above object of the invention, the technical solution adopted in the utility model is: but a kind of device for casting that is used for perfusion cervical pedicle bolt, form by bolus tube and push rod, described bolus tube is a through-hole structure, the one end is provided with the structure that is tightly connected that cooperates with the hollow wall of pedicle screw end, and the other end is an inlet; The diameter of described push rod is less than the diameter of the inlet of bolus tube, and push rod and bolus tube closely cooperate, and the inlet end of described bolus tube is provided with the ledge structure of protrusion; Described push rod is a T shape structure.
Above, the effect of the structure of described step is in order to prevent that bolus tube from skidding in use, to increase its hold; The push rod of described T shape structure is for the ease of operation.Pressurization when being convenient to pour into.
Further technical scheme, the outside of described ledge structure is provided with the friction stricture of vagina.Described friction stricture of vagina can be a plurality of salient points or projection, the structures such as striped that perhaps rub, and its effect is the hold that further increases bolus tube, is convenient to practical operation.
Corresponding with it another kind of technical scheme, the outside of described ledge structure fixedly installs jug.After handle was set, the whole T-shaped structure of bolus tube was convenient to control and operate.
In the technique scheme, described push rod is provided with scale.With accurate control groundwater increment.
Because the technique scheme utilization, the advantage that this utility model compared with prior art has is:
1, this utility model is provided with ledge structure at the inlet end of bolus tube, push rod is arranged to T shape structure again, thereby has increased the hold of bolus tube, has made things convenient for exerting pressure of whole device for casting, is convenient to operation.
2, this utility model is provided with scale on push rod, thereby can accurately control groundwater increment, has further guaranteed the precision of operation.
3, this utility model is simple in structure, is easy to processing and fabricating, is suitable for applying.
Description of drawings
Fig. 1 is the cutaway view of this utility model embodiment one;
Fig. 2 is the cutaway view of bolus tube among this utility model embodiment one;
Fig. 3 is the cutaway view of push rod among this utility model embodiment one;
Fig. 4 is the front view of push rod among this utility model embodiment one.
Wherein: 1, bolus tube; 2, push rod; 3, ledge structure; 4, handle.
The specific embodiment
Below in conjunction with drawings and Examples this utility model is further described:
Embodiment one
Shown in Fig. 1～4, but a kind of device for casting that is used for perfusion cervical pedicle bolt is made up of bolus tube 1 and push rod 2, and described bolus tube 1 is a through-hole structure, the one end is provided with the structure that is tightly connected that cooperates with the hollow wall of pedicle screw end, and the other end is an inlet; The diameter of described push rod 2 is less than the diameter of the inlet of bolus tube, and push rod and bolus tube closely cooperate, and the inlet end of described bolus tube 1 is provided with the ledge structure 3 of protrusion; Described push rod 2 is a T shape structure; The outside of described ledge structure fixedly installs jug 4, and described push rod 2 is provided with scale.
Above, the effect of the structure of described step is in order to prevent that bolus tube from skidding in use, to increase its hold; The push rod of described T shape structure is for the ease of operation.Pressurization when being convenient to pour into.The outside of ledge structure fixedly installs jug, and the whole T-shaped structure of bolus tube is convenient to control and operate.
In the present embodiment, described push rod and bolus tube all adopt titanium alloy material, bolus tube length is 25cm, internal diameter is 3mm, and one time groundwater increment is about 1.5ml, can repeat repeatedly to pour into, be provided with the coupling helicitic texture with the screw junction, making the connecting device of bolus tube and screw is helicitic texture, becomes tight connection, prevents that bone cement is from the junction seepage.The bone cement push rod length is 30cm, and external diameter is 3mm, with the bolus tube tight connecting, does not have refluence when making perfusion, and the body of rod is marked with scale, and with groundwater increment is corresponding, the handle place adopts the design of T type, pressurization during convenient the perfusion.
Certainly, described bolus tube tail end external diameter can slightly enlarge and surface treatment, controls easily during perfusion, and the tail end bore slightly amplifies, and can closely be connected with ordinary syringe.
Embodiment two
But a kind of device for casting that is used for perfusion cervical pedicle bolt is made up of bolus tube and push rod, and described bolus tube is a through-hole structure, and the one end is provided with the structure that is tightly connected that cooperates with the hollow wall of pedicle screw end, and the other end is an inlet; The diameter of described push rod is less than the diameter of the inlet of bolus tube, and push rod and bolus tube closely cooperate, and the inlet end of described bolus tube is provided with the ledge structure of protrusion; Described push rod is a T shape structure.The outside of described ledge structure is provided with the friction stricture of vagina.Described friction stricture of vagina can be a plurality of salient points or projection, the structures such as striped that perhaps rub, and its effect is the hold that further increases bolus tube, is convenient to practical operation.
Claims (4)
1. but device for casting that is used for perfusion cervical pedicle bolt, form by bolus tube (1) and push rod (2), described bolus tube (1) is a through-hole structure, and the one end is provided with the structure that is tightly connected that cooperates with the hollow wall of pedicle screw end, and the other end is an inlet; The diameter of described push rod (2) is less than the diameter of the inlet of bolus tube, and push rod and bolus tube closely cooperate, and it is characterized in that: the inlet end of described bolus tube (1) is provided with the ledge structure (3) of protrusion; Described push rod (2) is a T shape structure.
2. but the device for casting that is used for perfusion cervical pedicle bolt according to claim 1 is characterized in that: the outside of described ledge structure is provided with the friction stricture of vagina.
3. but the device for casting that is used for perfusion cervical pedicle bolt according to claim 1 is characterized in that: the outside of described ledge structure fixedly installs jug (4).
4. but the device for casting that is used for perfusion cervical pedicle bolt according to claim 1 is characterized in that: described push rod (2) is provided with scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200383291U CN201346238Y (en) | 2009-01-14 | 2009-01-14 | Pouring device used for pourable screw for pedicle of vertebral arch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200383291U CN201346238Y (en) | 2009-01-14 | 2009-01-14 | Pouring device used for pourable screw for pedicle of vertebral arch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201346238Y true CN201346238Y (en) | 2009-11-18 |
Family
ID=41365719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200383291U Expired - Fee Related CN201346238Y (en) | 2009-01-14 | 2009-01-14 | Pouring device used for pourable screw for pedicle of vertebral arch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201346238Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102940523A (en) * | 2012-11-26 | 2013-02-27 | 中国人民解放军成都军区总医院 | Assembly for reinforcing injectable vertebral pedicle screw |
| CN109124752A (en) * | 2018-09-14 | 2019-01-04 | 创辉医疗器械江苏有限公司 | A kind of vertebral column minimally invasive Cement fixation device assembly |
-
2009
- 2009-01-14 CN CNU2009200383291U patent/CN201346238Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102940523A (en) * | 2012-11-26 | 2013-02-27 | 中国人民解放军成都军区总医院 | Assembly for reinforcing injectable vertebral pedicle screw |
| CN109124752A (en) * | 2018-09-14 | 2019-01-04 | 创辉医疗器械江苏有限公司 | A kind of vertebral column minimally invasive Cement fixation device assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20160114 |