CN203777032U - Pediclescrew cannula - Google Patents
Pediclescrew cannula Download PDFInfo
- Publication number
- CN203777032U CN203777032U CN201420109302.8U CN201420109302U CN203777032U CN 203777032 U CN203777032 U CN 203777032U CN 201420109302 U CN201420109302 U CN 201420109302U CN 203777032 U CN203777032 U CN 203777032U
- Authority
- CN
- China
- Prior art keywords
- locking sleeve
- sleeve
- pedicle nail
- locking
- cylindrical section
- 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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Abstract
The utility model discloses a pedicle screw cannula. The pedicle screw cannula comprises a cannula body and a first locking sleeve, wherein the cannula body comprises a clamping arm section and a cylinder section, the clamping arm section comprises a first clamping arm and a second clamping arm, a first inclined surface is transversely arranged on the outer surface of the first clamping arm, and a second inclined surface is transversely arranged on the outer surface of the second clamping arm; the cylinder section of the cannula body is sleeved with the first locking sleeve, the first locking sleeve is provided with inclined surfaces matched with the first inclined surface and the second inclined surface, and when the first locking sleeve moves towards the clamping arm section along the cannula body, the inclined surfaces of the first locking sleeve apply forces which enable the first clamping arm and the second clamping arm to move oppositely to the first inclined surface and the second inclined surface, so that a pedicle screw is clamped by the first clamping arm and the second clamping arm. The pedicle screw cannula is simple to operate, the screw is flexible and convenient to mount, the operation difficulty of surgery is reduced, and risks of the surgery are reduced.
Description
Technical field
This utility model relates to medical instruments field, relates in particular to a kind of pedicle nail sleeve pipe.
Background technology
Common thoracolumbar spine disease comprises degeneration, fracture, tumor, infection etc.Traditional internal fixation of spine operation wound is larger, and soft tissue cuts and peels off widely, easily cause hemorrhage more, complication that the dissect physiology of spinal column changes and vertebral body is unstable, postoperative rehabilitation time lengthening etc.Micro-wound surgical operation is since the development seventies in last century, and along with operating theater instruments is constantly updated, advanced person's the continuous appearance of medical imaging equipment and the application of art Computer assisting navigation, less invasive techniques develops very fast in spinal surgery.Minimally Invasive Surgery reduces operating time, reduces the sickness rate of complication, alleviates Shu Zhong tissue injury and hemorrhage, shortens patient's recovery time, alleviates operation pain, is that otch is attractive in appearance, shortens and is in hospital and rehabilitation duration, reduces drug use and the Financial cost of the cost of being in hospital.Along with scientific and technological development, vertebral column minimally invasive technology, using the part as conventional surgical technology, becomes a main trend of internal fixation of spine technical development.
Pedicle screw instrumentation has fixedly advantage of three posts, is a kind of very ripe spinal surgery technology, is widely used.Conventionally the securing members such as pedicle screw, hook implanted and fixed with vertebral body, by pitman, connecting, then fix with holding screw, playing a supportive role.Pedicle nail sleeve pipe has played the controlling of pedicle nail, positioning action in operation process, by its distinctive hollow channel, under the prerequisite of tiny incisions, can guide other apparatus to realize the screw-in of pedicle nail, fix, lift some row such as resets, rod reset, holding screw screws and operate through sleeve pipe.But in current existing vertebral column minimally invasive system, still there is the shortcomings such as loaded down with trivial details, the upper nail of operating process is difficult, motility is weak, increased the operation easier of operation, operation risk is increased.
Therefore, it is easy that those skilled in the art is devoted to develop a kind of flexible operation, the pedicle nail sleeve pipe that can be good at being used in conjunction with other operating theater instruments in art simultaneously.
Utility model content
Because the above-mentioned defect of prior art, technical problem to be solved in the utility model is to provide a kind of simple and convenient pedicle nail sleeve pipe.
For achieving the above object, this utility model provides a kind of pedicle nail sleeve pipe, and described pedicle nail sleeve pipe comprises,
Sleeve body, described sleeve body comprises gripper arm segments and cylindrical section, described gripper arm segments comprises the first clamping limb and the second clamping limb, on described the first clamping limb outer surface, is laterally provided with the first inclined-plane, on described the second clamping limb outer surface, is laterally provided with the second inclined-plane; With
The first locking sleeve, described the first locking sleeve is socketed on the described cylindrical section of described sleeve body, on described the first locking sleeve, there is the inclined-plane matching with described the first inclined-plane and described the second inclined-plane, when described the first locking sleeve moves along described sleeve body to described gripper arm segments, the inclined-plane of described the first locking sleeve applies to described the first inclined-plane and described the second inclined-plane described the first clamping limb and the mobile in opposite directions power of described the second clamping limb of making.Under the effect of power, the relative distance of described the first clamping limb and described the second clamping limb shortens, thereby realizes the first clamping limb and the clamping of the second clamping limb to pedicle nail, and the larger clamping of dynamics is tighter, when this power is eliminated, pedicle nail can depart from from described pedicle nail sleeve pipe easily.Preferably, described the first inclined-plane and described the second inclined-plane are on the same conical surface.Herein, " inclined-plane " can be general inclined-plane, can be also the conical surface, and in this utility model, preferably " inclined-plane " is the conical surface." sleeve body axially " is the length direction of sleeve body herein, laterally refers to the width of sleeve body.
Further, the cylinder of described cylindrical section offer on arm be parallel to pedicle nail quill to groove, described groove is to described gripper arm segments opening, and described groove is between the connecting portion and described the second clamping limb and the connecting portion of described cylindrical section of described the first clamping limb and described cylindrical section.Preferably, described groove is inverted U-shaped or inverted V-shaped.This groove is the breach on pedicle nail sleeve outer wall, can effectively reduce the first clamping limb and the mobile in opposite directions resistance of the second clamping limb.
Further, the outer wall of described sleeve body is provided with and is parallel to the axial guiding groove of described sleeve body, when described the first locking sleeve is socketed on described sleeve body, only can moves and can not rotate along guiding groove.Preferably, described guiding groove is located on described cylindrical section outer wall near clamping limb place.
Further, described pedicle nail sleeve pipe also comprises the second locking sleeve, described the second locking sleeve is socketed on described cylindrical section, and in use described the second locking sleeve can apply the power that described the first locking sleeve is moved to described gripper arm segments to described the first locking sleeve.
Further, described the second locking sleeve is positioned at the side away from described gripper arm segments (outside of the first locking sleeve) of described the first locking sleeve, described the first locking sleeve and described the second locking sleeve are provided with the screw thread cooperatively interacting, and described the second locking sleeve is set to only can not move axially along described sleeve body along described sleeve body outer wall rotation.
Further, the described cylindrical section outer wall of described sleeve body is provided with annular groove, and described the second locking sleeve is provided with the ridge that protrudes from the second locking sleeve inwall, and described ridge inlay card is in described annular groove.
Further, the second locking sleeve is provided with threaded hole, described ridge is the bolt adapting with described hole, when described bolt screws in described hole, the tightening latch end of described bolt can protrude from the inwall of described the second locking sleeve, and is entrenched in the annular groove on described cylindrical section outer wall.
Further, the number with threaded hole on described the second locking sleeve is 2-6, is preferably 3-4.
Further, described the first locking sleeve is provided with threaded aperture, described the first locking sleeve is furnished with the bolt adapting with described aperture, when described bolt screws in described aperture, the tightening latch end of described bolt can protrude from the inwall of described the first locking sleeve, and is entrenched in the guiding groove of described sleeve body.Preferably, the number of the threaded aperture on described the first locking sleeve is 2.
Further, described the first locking sleeve is provided with female thread, and described the second locking sleeve is provided with the external screw thread matching with the female thread of described the first locking sleeve.
Technique effect
In use, user only needs to screw the second locking sleeve, just can realize pedicle nail sleeve pipe to the clamping of pedicle nail or relieving.Detailed process is, user screws the second locking sleeve, and because the bolt on the second locking sleeve is entrenched in annular groove, therefore the second locking sleeve cannot move relative to sleeve body in the axial direction.The first locking sleeve coordinates with the second locking sleeve by screw thread, and due to the effect of guiding groove, the first locking sleeve only can move vertically, and cannot rotate, and therefore screws in process, and the first locking sleeve can move to gripper arm segments.Under the inclined-plane of the first locking sleeve and the inclined-plane of gripping section match, the first clamping limb and the second clamping limb can move toward one another, thereby realize the clamping to pedicle nail.Contrary, along screwing, can decontrol easily pedicle nail in the other direction.Pedicle nail sleeve pipe of the present utility model nail simple to operate, upper is convenient flexibly, has reduced the operation easier of operation, has reduced operation risk.
Below with reference to accompanying drawing, the technique effect of design of the present utility model, concrete structure and generation is described further, to understand fully the purpose of this utility model, feature and effect.
Accompanying drawing explanation
Fig. 1 is the perspective exploded view of a preferred embodiment of the present utility model;
Fig. 2 is the front view decomposing schematic representation of a preferred embodiment of the present utility model;
Fig. 3 is the side view decomposing schematic representation of a preferred embodiment of the present utility model;
Fig. 4 is the sleeve body of a preferred embodiment of the present utility model and the connection diagram of the first locking sleeve;
Fig. 5 is the sleeve body of a preferred embodiment of the present utility model and the connection cutaway view of the first locking sleeve;
Fig. 6 is the sleeve body of a preferred embodiment of the present utility model and the connection diagram of the second locking sleeve;
Fig. 7 is the sleeve body of a preferred embodiment of the present utility model and the connection cutaway view of the second locking sleeve;
Fig. 8 is the first locking sleeve of a preferred embodiment of the present utility model and the connection cutaway view of the second locking sleeve;
Fig. 9 is the first locking sleeve of a preferred embodiment of the present utility model and the connection axonometric chart of the second locking sleeve;
Figure 10 is the pedicle nail sleeve pipe of a preferred embodiment of the present utility model and the connection diagram of pedicle nail.
The specific embodiment
Embodiment 1
As shown in the figure, the present embodiment provides a kind of pedicle nail sleeve pipe, comprises sleeve body 1, the first locking sleeve 2 and the second locking sleeve 3.Sleeve body 1 comprises gripper arm segments and cylindrical section, gripper arm segments comprises the first clamping limb 11 and the second clamping limb 12, being connected on cylindrical section of the first clamping limb 11 and the second clamping limb 12 symmetries, the first clamping limb 11 outer surfaces are provided with the first inclined-plane 111, the second clamping limb 12 outer surfaces be provided with 121, the first inclined-planes 111, the second inclined-plane and the second inclined-plane 121 perpendicular to sleeve body axially.The first locking sleeve 2 is socketed on the cylindrical section of sleeve body 1, on the first locking sleeve 2, there is the inclined-plane 25 matching with the first inclined-plane 111 and the second inclined-plane 121, when the first locking sleeve 2 moves along sleeve body 1 to gripper arm segments, the inclined-plane 25 of the first locking sleeve 2 applies to the first inclined-plane 111 and the second inclined-plane 121 the first clamping limb 11 and the mobile in opposite directions power of the second clamping limb 12 of making.Under the effect of power, the relative distance of the first clamping limb 11 and the second clamping limb 12 shortens, thereby realizes the clamping of the first clamping limb 11 and 12 pairs of pedicle nails of the second clamping limb, and the larger clamping of dynamics is tighter, when this power is eliminated, pedicle nail can depart from from pedicle nail sleeve pipe easily.In the present embodiment, the first inclined-plane 111 and the second inclined-plane 121 are on the same conical surface.
The cylinder of sleeve body 1 cylindrical section offer on arm be parallel to pedicle nail quill to groove 13, groove 13 is to gripper arm segments opening, and groove 13 is positioned at the centre position of the connecting portion of the first clamping limb 11 and described cylindrical section and the connecting portion of the second clamping limb 12 and cylindrical section.In the present embodiment, groove 13 is inverted U-shaped, and groove 13 can be inverted V-shaped in other embodiments.This groove 13 is the breach on pedicle nail sleeve outer wall, can effectively reduce the first clamping limb 11 and the mobile in opposite directions resistance of the second clamping limb 12.
On the outer wall of sleeve body 1, be provided with and be parallel to the axial guiding groove of sleeve body 15, in the present embodiment, the quantity of guiding groove 15 is two, on the symmetrical outer wall that is arranged on sleeve body 1.On the first locking sleeve 2, be arranged with threaded aperture 21 and aperture 22, the first locking sleeve 2 is furnished with bolt 23 and the bolt 24 adapting with aperture 21 and aperture 22, when bolt screws in aperture, the tightening latch end of bolt can protrude from the inwall of the first locking sleeve 1, and is entrenched in the guiding groove 15 of sleeve body 1.When therefore, the first locking sleeve 2 is socketed in sleeve body 1, only can moves and can not rotate along guiding groove 15.Adopt dismountable bolt, not only can easily the first locking sleeve 2 be assembled in sleeve body 1, and in use, can make by tighting a bolt the first locking sleeve 2 be fixed on closely in sleeve body 1, thereby realize pedicle nail in operation process, can effectively be clamped.
The second locking sleeve 3 is socketed on cylindrical section.The second locking sleeve 3 is positioned at the outside of the first locking sleeve 2, and the first locking sleeve 2 is provided with female thread, and the second locking sleeve 3 is provided with the external screw thread matching with the female thread of the first locking sleeve 2.Definition herein, one end of the telescopic joint pedicle nail of pedicle nail is inner side, the other end is outside.
The cylindrical section outer wall of sleeve body 1 is provided with annular groove, the second locking sleeve 3 is provided with threaded hole 31, the number of the present embodiment mesopore 31 is 4, centrosymmetry arranges, the second locking sleeve 3 is furnished with the bolt 32 adapting with hole 31, when bolt 32 screws in hole 31, the tightening latch end of bolt 32 can protrude from the inwall of the second locking sleeve 3, and is entrenched in the annular groove 14 on cylindrical section outer wall.The second locking sleeve 3 only can not move axially along sleeve body 1 along sleeve body 1 outer wall rotation.And adopt the design of bolt, its advantage is, thereby can make by tighting a bolt the second locking sleeve 3 be fixed on closely realization pedicle nail in operation process in sleeve body 1, can effectively be fixed.
In use, user only needs to screw the second locking sleeve 3, just can realize pedicle nail sleeve pipe to the clamping of pedicle nail 01 or relieving.Detailed process is, user screws the second locking sleeve 3, and because the bolt 32 on the second locking sleeve 3 is entrenched in annular groove 14, therefore the second locking sleeve 3 cannot move relative to sleeve body 1 in the axial direction.The first locking sleeve 2 coordinates with the second locking sleeve 3 by screw thread, and due to the effect of guiding groove 15, the first locking sleeve 2 only can be along the moving axially of sleeve body 1, and cannot rotate, and therefore screws in process, and the first locking sleeve 2 can move to gripper arm segments.Under working in coordination on the inclined-plane 25 of the first locking sleeve 2 and the inclined-plane of gripping section (the first inclined-plane 111 and the second inclined-plane 121), the first clamping limb 11 and the second clamping limb 12 can move toward one another, thereby realize the clamping to pedicle nail 01.Contrary, along screwing, can decontrol easily pedicle nail 01 in the other direction.
More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all technical staff in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in the determined protection domain by claims.
Claims (10)
1. a pedicle nail sleeve pipe, is characterized in that, described pedicle nail sleeve pipe comprises,
Sleeve body, described sleeve body comprises gripper arm segments and cylindrical section, described gripper arm segments comprises the first clamping limb and the second clamping limb, on described the first clamping limb outer surface, is laterally provided with the first inclined-plane, on described the second clamping limb outer surface, is laterally provided with the second inclined-plane; With
The first locking sleeve, described the first locking sleeve is socketed on the described cylindrical section of described sleeve body, has the inclined-plane matching with described the first inclined-plane and described the second inclined-plane on described the first locking sleeve.
2. pedicle nail sleeve pipe as claimed in claim 1, it is characterized in that, the cylinder of described cylindrical section offer on arm be parallel to pedicle nail quill to groove, described groove is between the connecting portion and described the second clamping limb and the connecting portion of described cylindrical section of described the first clamping limb and described cylindrical section.
3. pedicle nail sleeve pipe as claimed in claim 1, it is characterized in that, the outer wall of described sleeve body is provided with and is parallel to the axial guiding groove of described sleeve body, when described the first locking sleeve is socketed on described sleeve body, only can moves and can not rotate along guiding groove.
4. pedicle nail sleeve pipe as claimed in claim 1, it is characterized in that, described pedicle nail sleeve pipe also comprises the second locking sleeve, described the second locking sleeve is socketed on described cylindrical section, and in use described the second locking sleeve can apply the power that described the first locking sleeve is moved to described gripper arm segments to described the first locking sleeve.
5. pedicle nail sleeve pipe as claimed in claim 4, it is characterized in that, described the second locking sleeve is in the side away from described gripper arm segments of described the first locking sleeve, described the first locking sleeve and described the second locking sleeve are provided with the screw thread cooperatively interacting, and described the second locking sleeve is set to only can not move axially along described sleeve body along described sleeve body outer wall rotation.
6. pedicle nail sleeve pipe as claimed in claim 5, it is characterized in that, the described cylindrical section outer wall of described sleeve body is provided with annular groove, and described the second locking sleeve is provided with the ridge that protrudes from the second locking sleeve inwall, and described ridge inlay card is in described annular groove.
7. pedicle nail sleeve pipe as claimed in claim 6, it is characterized in that, the second locking sleeve is provided with threaded hole, described ridge is the bolt adapting with described hole, when described bolt screws in described hole, the tightening latch end of described bolt can protrude from the inwall of described the second locking sleeve, and is entrenched in the annular groove on described cylindrical section outer wall.
8. pedicle nail sleeve pipe as claimed in claim 7, is characterized in that, the number in the threaded hole on described the second locking sleeve is 2-6.
9. pedicle nail sleeve pipe as claimed in claim 3, it is characterized in that, described the first locking sleeve is provided with threaded aperture, described the first locking sleeve is furnished with the bolt adapting with described aperture, when described bolt screws in described aperture, the tightening latch end of described bolt can protrude from the inwall of described the first locking sleeve, and is entrenched in the guiding groove of described sleeve body.
10. pedicle nail sleeve pipe as claimed in claim 5, is characterized in that, described the first locking sleeve is provided with female thread, and described the second locking sleeve is provided with the external screw thread matching with the female thread of described the first locking sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109302.8U CN203777032U (en) | 2014-03-11 | 2014-03-11 | Pediclescrew cannula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109302.8U CN203777032U (en) | 2014-03-11 | 2014-03-11 | Pediclescrew cannula |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203777032U true CN203777032U (en) | 2014-08-20 |
Family
ID=51313280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420109302.8U Expired - Fee Related CN203777032U (en) | 2014-03-11 | 2014-03-11 | Pediclescrew cannula |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203777032U (en) |
-
2014
- 2014-03-11 CN CN201420109302.8U patent/CN203777032U/en not_active Expired - Fee Related
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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: 20140820 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |