CN201279177Y - Slide rail type intervertebral spreader - Google Patents
Slide rail type intervertebral spreader Download PDFInfo
- Publication number
- CN201279177Y CN201279177Y CNU2008201060508U CN200820106050U CN201279177Y CN 201279177 Y CN201279177 Y CN 201279177Y CN U2008201060508 U CNU2008201060508 U CN U2008201060508U CN 200820106050 U CN200820106050 U CN 200820106050U CN 201279177 Y CN201279177 Y CN 201279177Y
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- distraction plate
- handle
- slide rail
- rail type
- distraction
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Abstract
The utility model relates to a sliding rail type intervertebral spreader, belongs to the technical field of medical instruments and is used for solving the problem of spreading and reduction of sliding vertebras. The technical proposal thereof is as follows: the spreader comprises a handle, a lower spreading plate and an upper spreading plate; the lower spreading plate is provided with a sliding rail; the upper spreading plate is provided with a groove which is matched with the upper spreading plate; the two spreading plates are in slide fit; and the lower spreading plate end is connected with the handle in a disassembling mode. The utility model has simple structure, can complete the operation of spreading and reduction conveniently, provides a comfortable appliance for clinical treatment of patients with serious lumbar spondylolisthesis and solves the problem no special instruments are available for the spreading and reduction in the operation of the lumbar spondylolisthesis in long time.
Description
Technical field
This utility model relates to a kind of medical equipment for the treatment of spondylolysis, belongs to the surgical medical equipment technical field.
Background technology
During illness such as treatment spinal cord injury, slippage at present, the most effective Therapeutic Method is to take the pedicle of vertebral arch internal fixation system with the vertebral body of the slippage converged fixed between parallel vertebral body that resets, final normal sagittal sequence of spinal column and the line of force relation recovered removed tractive and compressing to nerve root.Because the formation of spondylolysis is a chronic pathological process; lesion segment is under the effect of long-term ABNORMAL STRESS; partial structurtes become disorderly; spot hamartoplasia; stenosis of disc space; intervertebral height is lost even merged, and therefore want the slippage vertebral body is resetted, need can realize by the active force of three kinds of different directions; These three kinds of power are: intervertebral pulling power, act on traction force of slippage vertebral body and the support force of the next vertebral body, as shown in Figure 4: the pedicle of vertebral arch internal fixation system comprises and lifts pedicle nail 9, fixedly pedicle nail 8 and pitman between the two 10, utilize the fixation of pedicle nail fixing, lift pedicle nail and lift.Pedicle nail should be brought into play the effect that struts intervertebral space in the operation process, realize lifting the function of vertebral body again, two nails, one bar structure is difficult to the balance pivot that provides reliable and stable, therefore extremely narrow for intervertebral space, the slippage case that the vertebra slippage is very serious, it is big and therefore mutual restriction causes the difficulty that resets that intervertebral pulling and vertebral body lift these two kinds of active forces.And, the most normal middle-aged and elderly people that betides of spondylolysis, this age bracket patient sclerotin quality is generally relatively poor, the intervertebral brute force struts to lift and causes the loosening of nail bone interface unavoidably, make screw loosening, cause operative failure or can not reset fully, and under the situation that can not reset fully, screw will bear bigger buckling stress, more increase the risk of the disconnected rod of later stage broken nail.In the operation, must realize effectively strutting to the slippage gap, the pedicle nail system could effectively bring into play it and lift effect, but it is available to there is no independent intervertebral pulling device when treating lumbar spondylolisthesis clinically, the simple pedicle nail bar system that relies on is realized simultaneously effectively strutting, is lifted to reset and need suitable operation skill and consummate surgical experience, operation technique complexity, time-consuming, effort.Therefore, need a kind of distraction reduction apparatus that can cooperate the pedicle of vertebral arch inner fixing device of design badly, so that overcome this obstacle.
Summary of the invention
Defective that this utility model exists at existing pedicle nail system dilator and the situation that lacks device for spreading between the vertebra vertebral body clinically provide a kind of and the spondylolysis matching used slide rail type intervertebral pulling of the inner fixer device that resets.
The alleged problem of this utility model solves by the following technical programs:
A kind of slide rail type intervertebral pulling device comprises handle, down distraction plate and last distraction plate in the formation, described time distraction plate is provided with slide rail, and last distraction plate is provided with the groove that is mated, between two distraction plates for being slidingly matched; Be connected with handle removably after the described distraction plate assembly.
Above-mentioned slide rail type intervertebral pulling device is provided with clamping mechanism between described distraction plate and the handle, and described clamping mechanism is made up of spring and steel ball, and spring and steel ball place down in the blind hole of distraction plate one side, and the corresponding position on the handle is provided with the pit with the steel ball coupling.
Above-mentioned slide rail type intervertebral pulling device, it is described that distraction plate is identical with last distraction plate length down; The length of described distraction plate is 10～25cm, and its rear is narrower support portion, and the place ahead is the operate portions of broad, and its operate portions length is equivalent to the degree of depth of vertebral body, is 2～6cm.
Above-mentioned slide rail type intervertebral pulling device, the cross section of the junction of described handle and distraction plate are square, cross or polygon.
The utlity model has following beneficial effect:
1, can directly strut the intervertebral space of slippage, strut smooth operation, reliable, laborsaving, strut distance and be easy to hold;
2, this utility model only is responsible for producing the power that axially struts along lumbar vertebra in operation, the burden axial compressive load, and pedicle nail then is responsible for applying and is lifted reset force, thereby has avoided the phase mutual interference restriction of two kinds of different directions active forces;
When 3, the intervertebral brute force struts, often need great role power, after this part active force is born by this utility model, avoided pedicle nail to cause the loosening or damage of vertebra nail because of the application of force is excessive, this is particularly important to sufferers of osteoporosis face.
4, behind the intervertebral pulling, the reseting procedure of slippage vertebral body will be finished between level and smooth slide rail, the bigger frictional force between bone-bone interface or even bone-cicatrix interface of avoiding knowing clearly.
In a word, this utility model is simple in structure, be used for operation, and flexible and convenient operation is reliable and stable, can be widely used in the vertebral body distraction reduction art.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A profile (amplification) of Fig. 1;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is this utility model user mode reference diagram;
Fig. 5 is the lumbar vertebra plane graph.
Number in the figure is expressed as follows: 1. hands handle; 2. descend distraction plate; 3. go up distraction plate; 4. blind hole; 5. pit; 6. steel ball; 7. spring; 8. fixing pedicle nail; 9. lift pedicle nail; 10. pitman; 11. rumpbone; 12. lumbar vertebra 5; 13. lumbar vertebra 4; 14. pedicle of vertebral arch; 15. slide rail.
The specific embodiment
Referring to Fig. 1, Fig. 2, slide rail type intervertebral pulling device described in the utility model comprises handle 1, following distraction plate 2 and last distraction plate 3 in the formation, support portion one end of described distraction plate is connected with handle, be provided with between two distraction plates between 15, two distraction plates of slide rail to being slidingly matched.In the present embodiment, described handle is a T shape structure, extends forward along the connecting rod of handle vertical direction, and its tip position is provided with slot, and described slot is connected with the support portion of distraction plate; Between described handle connecting rod slot and following distraction plate, be provided with clamping mechanism, described clamping mechanism is made up of spring 7 and steel ball 6, spring and steel ball place down in the blind hole 4 of distraction plate end, corresponding position on the handle is provided with the pit 5 with the steel ball coupling, because blind hole is for tightening up mouth, before the clamping, steel ball can not skid off.During use, will descend distraction plate and last distraction plate to be slidingly matched after, be plugged on the handle slot with the following support portion of distraction plate, steel ball snaps fit onto in the pit on the handle under spring action, and distraction plate closely is connected with handle.For preventing the distraction plate slippage, also can between last distraction plate and handle slot, set up a clamping mechanism.In addition, the cross section of handle and distraction plate junction is square, cross or polygon; This kind structure can apply bigger revolving force under the handle effect.It is described that distraction plate is identical with last distraction plate length down; The length of described distraction plate is 10～25cm, and the length of operate portions is selected 2～6cm, and its size should not reset to the slippage lumbar vertebra with convenient less than the lumbar vertebra degree of depth.
Referring to accompanying drawing 4, Fig. 5, in the operation process, the direction that slide rail type intervertebral pulling device is parallel to intervertebral space is squeezed into, and dilator is slowly revolved turn 90 degrees, and realizes intervertebral pulling; At this moment, slippage vertebra vertebral body the next with it tightly rides in respectively up and down on two distraction plates, then handle taken, screw and lift the oncomelania mother, under the effect that lifts that lifts nail, rely on the effect of the guide rail between two distraction plates, can lift the slippage vertebra very easily and reset.
Operating process was as follows when this utility model used:
1) after anaesthetizing successfully, the lumbar spondylolisthesis patient gets the ventricumbent position, and single back, sterilization shop adopts center, back approach to appear the vertebral plate spinous process and the zygapophysial joints of slippage sections.
2) insert 4 pieces of pedicle screws in the pedicle of vertebral arch of slippage vertebra and the next vertebral body thereof, pitman is installed but is not locked.
3) vertebral plate of excision slippage vertebral body appears dural sac and nerve root, and nerve root is pulled to inboard protection, and the fibrous ring of cutting the slippage sections is with vertebral pulp pincers excision disc tissue.
4) with nerve hook neuroprotective root, the direction that slide rail type intervertebral pulling device is parallel to intervertebral space is squeezed into intervertebral space, slide rail type intervertebral pulling device is slowly revolved turn 90 degrees, and realizes that intervertebral space struts.
5) nut that is locked and follows closely is laid down slide rail type intervertebral pulling device handle, and locking lifts the nut of nail gradually, and in this process, the slippage vertebra can the intervertebral pulling device be a fulcrum promptly, realizes resetting along the slide rail of intervertebral pulling device, and back locking pedicle nail bar system resets.
6) the intervertebral pulling device is rotated back to the position that is parallel to the gap and take off, bone grafting in intervertebral space, the Invasive lumbar fusion device of inserting suitable types.
7) otch is closed in flushing.
This utility model is simple in structure, design is ingenious, easy to operate; Cooperate original pedicle nail pulling apparatus, when improving success rate of operation greatly, also reduced the operation easier of operation, higher utility is arranged.
Claims (4)
1. slide rail type intervertebral pulling device, it is characterized in that: comprise handle (1), following distraction plate (2) and last distraction plate (3) in the formation, described down distraction plate is provided with slide rail (15), and last distraction plate is provided with the groove that is mated, between two distraction plates for being slidingly matched; Be connected with handle after above-mentioned two distraction plate assembly.
2. slide rail type intervertebral pulling device according to claim 1, it is characterized in that: be provided with clamping mechanism between described distraction plate and the handle, described clamping mechanism is made up of spring (7) and steel ball (6), spring and steel ball place down in the blind hole (4) of distraction plate one side, and the corresponding position on the handle is provided with the pit (5) with the steel ball coupling.
3. slide rail type intervertebral pulling device according to claim 1 and 2 is characterized in that: described distraction plate is identical with last distraction plate length down; The length of described distraction plate is 10～25cm, and its rear is narrower support portion, and the place ahead is the operate portions of broad, and its operate portions length is equivalent to the degree of depth of vertebral body, is 2～6cm.
4. slide rail type intervertebral pulling device according to claim 3 is characterized in that: the cross section of the junction of described handle and distraction plate is square, cross or polygon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201060508U CN201279177Y (en) | 2008-09-28 | 2008-09-28 | Slide rail type intervertebral spreader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201060508U CN201279177Y (en) | 2008-09-28 | 2008-09-28 | Slide rail type intervertebral spreader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201279177Y true CN201279177Y (en) | 2009-07-29 |
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ID=40926065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201060508U Expired - Fee Related CN201279177Y (en) | 2008-09-28 | 2008-09-28 | Slide rail type intervertebral spreader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201279177Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109330643A (en) * | 2018-10-19 | 2019-02-15 | 中国人民解放军第二军医大学第二附属医院 | Centrum lifts device for spreading |
| CN115137422A (en) * | 2022-07-29 | 2022-10-04 | 长沙市中心医院 | Percutaneous installation axial distraction system for assisting calcaneus fracture minimally invasive surgery |
-
2008
- 2008-09-28 CN CNU2008201060508U patent/CN201279177Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109330643A (en) * | 2018-10-19 | 2019-02-15 | 中国人民解放军第二军医大学第二附属医院 | Centrum lifts device for spreading |
| CN109330643B (en) * | 2018-10-19 | 2019-12-13 | 中国人民解放军第二军医大学第二附属医院 | Centrum lifting and expanding device |
| CN115137422A (en) * | 2022-07-29 | 2022-10-04 | 长沙市中心医院 | Percutaneous installation axial distraction system for assisting calcaneus fracture minimally invasive surgery |
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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: 20090729 Termination date: 20100928 |