CN201912218U - Device for extending and fixing pedicle of vertebral arch - Google Patents
Device for extending and fixing pedicle of vertebral arch Download PDFInfo
- Publication number
- CN201912218U CN201912218U CN201020696647XU CN201020696647U CN201912218U CN 201912218 U CN201912218 U CN 201912218U CN 201020696647X U CN201020696647X U CN 201020696647XU CN 201020696647 U CN201020696647 U CN 201020696647U CN 201912218 U CN201912218 U CN 201912218U
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- CN
- China
- Prior art keywords
- nail
- rear screw
- pedicle
- core bar
- vertebral arch
- Prior art date
- 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
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- Prostheses (AREA)
Abstract
The utility model discloses a device for extending and fixing pedicle of vertebral arch, which comprises a front screw, a mandrel, a rear screw and a rear screw cap, wherein the front end of the mandrel is in threaded connection with the front screw; the rear screw is sleeved at the rear end of the mandrel; the mandrel is glidingly connected with the rear screw; the rear screw cap is arranged at the rear end of the rear screw; external threads matched with the rear screw cap are arranged on the outer lateral surface of the rear screw; and one end of the rear screw cap is closed, so that the mandrel is abutted against the inside of the rear screw cap when the rear screw is in threaded connection with the rear screw cap and further the mandrel and the rear screw are relatively fixed. According to the device for extending and fixing the pedicle of vertebral arch, which is disclosed by the utility model, the distance between a vertebral body and the pedicle of vertebral arch can be prolonged, and thereby vertebral canal and foramen intervertebrale are enlarged, the neurothlipsis is relieved and the aim of reducing the pressure is achieved; and the device can be used as a fixing device to be applied to a lumbar spinal canal narrow surgery.
Description
Technical field
This utility model belongs to the lumbar spinal stenosis surgical field, is specifically related to a kind of pedicle of vertebral arch and prolongs fixture.
Background technology
Along with the aggravation and the bad work living habit of modern of aged tendency of population, the sickness rate of lumbar spinal stenosis is more and more higher.Lumbar spinal stenosis is meant that the hyperosteogeny that caused by a variety of causes or proliferation of fibrous tissue, plumpness cause the narrow of canalis spinalis or nerve root canal, stimulation and pressuring neural root or cauda equina nerve and a series of clinical symptoms of causing; Lumbar spinal stenosis can be monoplane (adjacent two vertebral bodys, intervertebral disc, little joint and a suporting ligament), or many planes (involving two or more gaps).Its typical clinical manifestation is: the bilateral nerve is walked lamely, and intermittent thigh or shank radiated pain are stood, sx when activity or waist hyperextension for a long time, sits, crouches or alleviate during the waist flexing.Invalid to regular expectant treatment for some, lumbago and skelalgia, numbness of lower limbs, intermittent claudication continue to increase the weight of, and carrying out property of neurological disorder sign increases the weight of, and influence the work life, and patient requires to make the life better quality person, multirow operative treatment.
Present operation method to be adopted through excision decompression, pedicle screw fixation and intervertebral fusion arts such as way of escape vertebral plate, articular processes, thereby enlarges canalis spinalis and intervertebral foramina, reaches the purpose of releasing to the compressing of nerve.
Yet, in the practical application, when adopting the pedicle screw fixation device, often there are complication such as internal fixation failure, neighbouring section regression, this operation wound is big simultaneously, expense is expensive, and it is big painful to bring the patient.
Summary of the invention
This utility model purpose provides a kind of pedicle of vertebral arch with well secured power and prolongs fixture.
For achieving the above object, the technical solution adopted in the utility model is: a kind of pedicle of vertebral arch prolongs fixture, comprises preceding nail, core bar, back nail and rear nut,
The front end of described core bar is connected with preceding oncomelania stricture of vagina, and its rear end is socketed with the back nail, and core bar is slidingly connected with the back nail;
Described rear nut is located at the rear end of back nail, and the lateral surface of back nail is provided with the external screw thread that cooperates with described rear nut, the end sealing of rear nut, and core bar was butted in the described rear nut when back nail and rear nut were threaded, and made core bar and back nail relative fixed.
Above, nail is Intrapyramidal for fixing to lumbar vertebra before described, then nail is to be fixed in the pedicle of vertebral arch, connects by core bar between the two, because core bar is connected with preceding oncomelania stricture of vagina, be slidingly connected with the back nail, thereby externally promote core bar and preceding nail and back nail can be strutted, the distance of nail and back nail before prolonging, thus vertebral body and pedicle of vertebral arch separated, prolong distance between the two, finally reach the purpose of expansion canalis spinalis and intervertebral foramina, decompression.
The effect of described rear nut is to make core bar and back nail relative fixed, thereby the softened state of preceding nail and back nail is maintained.
In the technique scheme, the lateral surface of described preceding nail is provided with screw thread, projection or frosted structure.
In the technique scheme, the lateral surface of described back nail is provided with screw thread, projection or frosted structure.
Further technical scheme is provided with through hole in the described core bar, is provided with the inner chamber that is communicated with the core bar through hole in the described preceding nail, and the outer surface of preceding nail is provided with plurality of openings, and perforate is communicated with the inner chamber of preceding nail.
Because the technique scheme utilization, the advantage that this utility model compared with prior art has is:
1, pedicle of vertebral arch of the present utility model prolongs the length that fixture can prolong pedicle of vertebral arch, increase canalis spinalis and intervertebral foramina thereby reach, improve stenosis, remove nerve compression, reach the purpose of decompression, can be used as fixture and be used for the lumbar spinal stenosis surgical operation.
2. apparatus structure of the present utility model is simple, is easy to make, and has a good application prospect.
Description of drawings
Accompanying drawing 1 is the structural representation of this utility model embodiment one;
Accompanying drawing 2 is the cutaway view of this utility model embodiment one;
Accompanying drawing 3 is the cutaway view of preceding nail among this utility model embodiment one;
Accompanying drawing 4 is the cutaway view of core bar among this utility model embodiment one;
Accompanying drawing 5 is the cutaway view of back nail among this utility model embodiment one;
Accompanying drawing 6 is the cutaway view of rear nut among this utility model embodiment one;
Accompanying drawing 7 is the user mode figure of this utility model embodiment one;
Accompanying drawing 8 is the another user mode figure of this utility model embodiment one.
Wherein: 1, preceding nail; 2, core bar; 3, back nail; 4, rear nut; 5, through hole; 6, perforate; 7, inner chamber.
The specific embodiment
Below in conjunction with drawings and Examples this utility model is further described:
Embodiment one
Shown in Fig. 1 ~ 8, a kind of pedicle of vertebral arch prolongs fixture, nail 1, core bar 2, back nail 3 and rear nut 4 before comprising,
The front end of described core bar 2 is threaded with preceding nail 1, and its rear end is socketed with back nail 3, and core bar is slidingly connected with the back nail;
Described rear nut 4 is located at the rear end of back nail 3, and the lateral surface of back nail is provided with the external screw thread that cooperates with described rear nut, the end sealing of rear nut, and core bar was butted in the described rear nut when back nail and rear nut were threaded, and made core bar and back nail relative fixed.
Be provided with through hole 5 in the described core bar 2, be provided with the inner chamber 7 that is communicated with core bar through hole 5 in the described preceding nail, the outer surface of preceding nail is provided with plurality of openings 6, and perforate 6 is communicated with the inner chamber 7 of preceding nail.
The lateral surface of described back nail is provided with helicitic texture.This is for the combine fastness of nail after strengthening with pedicle of vertebral arch.
Claims (4)
1. a pedicle of vertebral arch prolongs fixture, it is characterized in that: comprise preceding nail (1), core bar (2), back nail (3) and rear nut (4),
The front end of described core bar (2) is threaded with preceding nail (1), and its rear end is socketed with back nail (3), and core bar is slidingly connected with the back nail;
Described rear nut (4) is located at the rear end of back nail (3), and the lateral surface of back nail is provided with the external screw thread that cooperates with described rear nut, the end sealing of rear nut, and core bar was butted in the described rear nut when back nail and rear nut were threaded, and made core bar and back nail relative fixed.
2. pedicle of vertebral arch according to claim 1 prolongs fixture, it is characterized in that: the lateral surface of nail is provided with screw thread, projection or frosted structure before described.
3. pedicle of vertebral arch according to claim 1 prolongs fixture, it is characterized in that: the lateral surface of described back nail is provided with screw thread, projection or frosted structure.
4. pedicle of vertebral arch according to claim 1 prolongs fixture, it is characterized in that: be provided with through hole (5) in the described core bar (2), be provided with the inner chamber (7) that is communicated with core bar through hole (5) in the nail before described, the outer surface of preceding nail is provided with plurality of openings (6), and perforate (6) is communicated with the inner chamber (7) of preceding nail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020696647XU CN201912218U (en) | 2010-12-31 | 2010-12-31 | Device for extending and fixing pedicle of vertebral arch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020696647XU CN201912218U (en) | 2010-12-31 | 2010-12-31 | Device for extending and fixing pedicle of vertebral arch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201912218U true CN201912218U (en) | 2011-08-03 |
Family
ID=44412037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020696647XU Expired - Fee Related CN201912218U (en) | 2010-12-31 | 2010-12-31 | Device for extending and fixing pedicle of vertebral arch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201912218U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104887300A (en) * | 2015-05-26 | 2015-09-09 | 王欢 | Split lengthening pedicle screw |
| CN111001069A (en) * | 2019-11-13 | 2020-04-14 | 邹最 | Exchange guide rod of tracheal catheter and application |
-
2010
- 2010-12-31 CN CN201020696647XU patent/CN201912218U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104887300A (en) * | 2015-05-26 | 2015-09-09 | 王欢 | Split lengthening pedicle screw |
| CN111001069A (en) * | 2019-11-13 | 2020-04-14 | 邹最 | Exchange guide rod of tracheal catheter and application |
| CN111001069B (en) * | 2019-11-13 | 2024-03-01 | 邹最 | Exchange guide rod of tracheal catheter and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20111231 |