CN217566280U - Pedicle screw extractor - Google Patents
Pedicle screw extractor Download PDFInfo
- Publication number
- CN217566280U CN217566280U CN202220383435.9U CN202220383435U CN217566280U CN 217566280 U CN217566280 U CN 217566280U CN 202220383435 U CN202220383435 U CN 202220383435U CN 217566280 U CN217566280 U CN 217566280U
- Authority
- CN
- China
- Prior art keywords
- claw
- straight cylinder
- thick bamboo
- straight section
- loop
- 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
Links
- 210000000078 claw Anatomy 0.000 claims abstract description 19
- 230000001737 promoting effect Effects 0.000 abstract description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract 6
- 235000017491 Bambusa tulda Nutrition 0.000 abstract 6
- 241001330002 Bambuseae Species 0.000 abstract 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract 6
- 239000011425 bamboo Substances 0.000 abstract 6
- 238000000605 extraction Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The utility model discloses a pedicle of vertebral arch screw extractor, including a sleeve body, the sleeve body is held tightly the portion and is located the straight section of thick bamboo portion on upper portion by the claw type of the tubaeform that is located the lower part of integrated into one piece and has certain elasticity, the top of straight section of thick bamboo portion, still fixedly connected with handle, and on straight section of thick bamboo portion, from last down still overlap in proper order and be equipped with a loop and a nut cover, be clearance fit between loop and the straight section of thick bamboo portion, straight section of thick bamboo portion is equipped with the external screw thread on being close to the position of claw type portion of holding tightly at least, the claw type portion of holding tightly contains at least three claw piece, all is equipped with the opening between two adjacent claw pieces, and each claw piece is equipped with the external screw thread on being close to the position of straight section of thick bamboo portion at least, be equipped with the internal thread in the nut cover. The utility model discloses a pedicle of vertebral arch screw extractor, the structure is ingenious, is applicable to taking out fast of the pedicle of vertebral arch screw of various patterns, labour saving and time saving, and the commonality is strong, and application scope is wide, and the practicality is strong, is worth promoting.
Description
Technical Field
The utility model belongs to the field of medical equipment, especially, relate to a pedicle of vertebral arch screw extractor.
Background
A pedicle screw is a screw used for spinal fixation. The existing pedicle screw comprises two structures, wherein one structure is fixedly connected between a screw part and a tail part, the other structure is a non-fixed connecting structure which can slide relatively between the screw part and the tail part, the tail parts of the two structures are respectively provided with an inwards sunken taking-out groove with a certain shape, such as a hexagon or a triangle, and when the taking-out groove is taken out, a corresponding taking-out accessory is used and is inserted to rotate, so that the tail part is driven to rotate to take out the screw. The pedicle screw with the fixedly connected structure is convenient to take out, and the pedicle screw with the non-fixed connection structure is convenient to have no influence on the screw when the tail part is connected with the tensioning device. For the pedicle screw with the unfixed connecting structure, the tail part needs to be lifted upwards when the pedicle screw is taken out, the lifting force is larger than the sliding friction force between the tail part and the screw, and then the taking-out accessory stretches into the taking-out groove in the tail part to take out the screw. For this reason, physicians desire a universal extraction tool that facilitates rapid response to extraction of different pedicle screws.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a pedicle screw extractor is provided.
The utility model discloses a realize through following technical scheme:
the pedicle screw extractor comprises a sleeve body, wherein the sleeve body consists of a horn-shaped claw-shaped clamping part which is integrally formed and positioned at the lower part and has certain elasticity and a straight cylinder part positioned at the upper part, a handle is fixedly connected above the straight cylinder part, a loop and a nut sleeve are sequentially sleeved on the straight cylinder part from top to bottom, the loop and the straight cylinder part are in clearance fit, the straight cylinder part is at least provided with an external thread at a position close to the claw-shaped clamping part, the claw-shaped clamping part comprises at least three claw sheets, an opening is arranged between every two adjacent claw sheets, each claw sheet is at least provided with an external thread at a position close to the straight cylinder part, the nut sleeve is internally provided with an internal thread, and the internal thread on the nut sleeve can be matched with the external thread on the straight cylinder part and the external thread on the outer side surface of each claw sheet so that the nut sleeve can move up and down relative to the straight cylinder part and the claw-shaped clamping part.
Preferably, the surface of the loop, which is in contact with the handle, is provided with a circular bulge, so that the friction force between the loop and the handle is reduced, and the handle is rotated more conveniently.
Preferably, the surface of the handle, which is in contact with the loop, is provided with the plane bearing, so that the friction force between the handle and the loop is reduced, and the handle is rotated more conveniently and more labor-saving.
Preferably, each of the lower ends of the claw pieces is provided with an inward hook for clasping the tail edge of the screw to ensure a more secure clasping of the screw tail.
The utility model has the advantages that:
the utility model discloses a pedicle of vertebral arch screw extractor, the structure is ingenious, is applicable to taking out fast of the pedicle of vertebral arch screw of various patterns, labour saving and time saving, and the commonality is strong, and application scope is wide, and the practicality is strong, is worth promoting.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
Fig. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a screw tail of a pedicle screw extractor in a clasped manner;
fig. 3 is a cross-sectional view of fig. 2.
Detailed Description
As shown in fig. 1-3, the pedicle screw extractor comprises a sleeve body 1, wherein the sleeve body 1 is composed of a lower horn-shaped clamping portion 2 with certain elasticity and an upper straight cylinder portion 3, the lower horn-shaped clamping portion 2 and the upper straight cylinder portion 3 are integrally formed, a handle 4 is fixedly connected to the upper portion of the straight cylinder portion 3, a loop 5 and a nut sleeve 6 are sequentially sleeved on the straight cylinder portion 3 from top to bottom, the loop 5 is in clearance fit with the straight cylinder portion 3, the straight cylinder portion 3 is provided with external threads 7 at least at a position close to the jaw-shaped clamping portion 2, the jaw-shaped clamping portion 2 comprises at least three jaw pieces 8, an opening is formed between every two adjacent jaw pieces 8, each jaw piece 8 is provided with the external threads 7 at least at a position close to the straight cylinder portion 3, internal threads are formed in the nut sleeve 6, and the internal threads on the nut sleeve 6 can be matched with the external threads of the straight cylinder portion 3 and the external threads on the outer side surfaces of the jaw pieces 8, so that the nut sleeve 6 can move up and down relative to the straight cylinder portion 3 and the jaw-shaped clamping portion 2.
The circular bulge 9 is arranged on the surface of the loop 5 contacting with the handle 4, so that the friction force between the loop and the handle 4 is reduced, and the handle is rotated more labor-saving. Or, the surface of the handle 4, which is in contact with the loop 5, is provided with a plane bearing, so that the friction force with the loop is reduced, and the handle is rotated more conveniently.
The lower end of each claw 8 is provided with an inwardly directed catch 10 for engaging with the edge of the tail 12 of the screw 11 to ensure a more secure engagement of the screw tail.
During the use, hold the afterbody of portion of holding pedicle of vertebral arch screw in advance with the claw type earlier, then make the nut cover move down and hold the claw type portion of holding tightly inwards to tighten up through rotatory nut cover, with hold the screw afterbody completely, next, to the pedicle of vertebral arch screw for fixed connection structure between screw portion and the afterbody, at this moment, only need to rotate the handle and can take out the screw, to the pedicle of vertebral arch screw that is the unfixed connection structure of relative slip between screw portion and the afterbody, at this moment, can hold in the palm the movable sleeve with one hand and upwards mention it and drive the screw afterbody and upwards mention, and make the power of carrying and carrying be greater than the sliding friction power between afterbody and the screw, then another hand of reuse rotates handle portion, take out the screw from this.
The utility model discloses a pedicle of vertebral arch screw extractor, the structure is ingenious, is applicable to taking out fast of the pedicle of vertebral arch screw of various patterns, labour saving and time saving, and the commonality is strong, and application scope is wide, and the practicality is strong, is worth promoting.
The above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (4)
1. The pedicle screw extractor is characterized by comprising a sleeve body, wherein the sleeve body consists of a horn-shaped claw-shaped clamping part which is integrally formed and positioned at the lower part and has certain elasticity and a straight cylinder part positioned at the upper part, a handle is fixedly connected above the straight cylinder part, a loop and a nut sleeve are sequentially sleeved on the straight cylinder part from top to bottom, the loop is in clearance fit with the straight cylinder part, the straight cylinder part is at least provided with an external thread at the position close to the claw-shaped clamping part, the claw-shaped clamping part comprises at least three claw sheets, an opening is arranged between every two adjacent claw sheets, each claw sheet is at least provided with an external thread at the position close to the straight cylinder part, an internal thread is arranged in the nut sleeve, and the internal thread on the nut sleeve can be matched with the external thread on the straight cylinder part and the external thread on the outer side surface of each claw sheet so that the nut sleeve can move up and down relative to the straight cylinder part and the claw-shaped clamping part.
2. The pedicle screw extractor of claim 1, wherein the loop has a rounded protrusion on a surface thereof that contacts the handle.
3. The pedicle screw extractor of claim 1, wherein a flat bearing is provided on the surface of the handle in contact with the loop.
4. A pedicle screw extractor as claimed in claim 1, wherein each claw is provided at its lower end with an inwardly directed catch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220383435.9U CN217566280U (en) | 2022-02-25 | 2022-02-25 | Pedicle screw extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220383435.9U CN217566280U (en) | 2022-02-25 | 2022-02-25 | Pedicle screw extractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217566280U true CN217566280U (en) | 2022-10-14 |
Family
ID=83538315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220383435.9U Expired - Fee Related CN217566280U (en) | 2022-02-25 | 2022-02-25 | Pedicle screw extractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217566280U (en) |
-
2022
- 2022-02-25 CN CN202220383435.9U patent/CN217566280U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20221014 |