CN208876733U - A medical nail remover - Google Patents
A medical nail remover Download PDFInfo
- Publication number
- CN208876733U CN208876733U CN201821021969.7U CN201821021969U CN208876733U CN 208876733 U CN208876733 U CN 208876733U CN 201821021969 U CN201821021969 U CN 201821021969U CN 208876733 U CN208876733 U CN 208876733U
- Authority
- CN
- China
- Prior art keywords
- bone screw
- handle
- bone
- cutting
- sliding sleeve
- 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
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 62
- 239000011324 bead Substances 0.000 description 10
- 230000014759 maintenance of location Effects 0.000 description 10
- 208000010392 Bone Fractures Diseases 0.000 description 4
- 206010017076 Fracture Diseases 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037118 bone strength Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
Abstract
本实用新型公开了一种医用取钉器，包括前端的切削杆、中部的锥形杆以及尾部的手柄，所述切削杆、锥形杆以及手柄中部均设有排屑通道，所述切削杆前端部设置有切削刃，所述手柄前端设置有为多边形滑动部，所述多边形滑动部上滑动套设有滑动套，所述滑动套外边缘为与接骨螺钉配合的六边形。采用该种取钉器在取出接骨螺钉时，能够从接骨螺钉端部的中心孔穿入到接骨螺钉内，通过手柄旋转将嵌入接骨螺钉中心孔长出的新骨切除，将滑动套移动至与接骨螺钉外部的内六角凹槽配合，然后旋转取钉器取出接骨螺钉，由于嵌入接骨螺钉中心孔长出的新骨被切除，能够有效防止接骨螺钉断裂。
The utility model discloses a medical nail remover, which comprises a cutting rod at the front end, a tapered rod at the middle and a handle at the tail. The cutting rod, the tapered rod and the middle of the handle are all provided with a chip removal channel. The front end portion is provided with a cutting edge, the front end of the handle is provided with a polygonal sliding portion, a sliding sleeve is provided on the polygonal sliding portion, and the outer edge of the sliding sleeve is a hexagonal shape matched with the bone screw. When taking out the bone screw, the screw remover can penetrate into the bone screw from the central hole at the end of the bone screw, and the new bone embedded in the central hole of the bone screw can be excised by rotating the handle, and the sliding sleeve can be moved to the same position as the bone screw. The hexagonal socket on the outside of the bone screw is matched, and then the screw extractor is rotated to take out the bone screw. Since the new bone that grows out of the central hole of the bone screw is removed, it can effectively prevent the bone screw from breaking.
Description
Technical field
The utility model belongs to orthopedic medical device technical field, specifically a kind of medical nail-fetching device.
Background technique
In fracture operation, when being treated to fracture patient, usually with fixed plate and bone screw to fracture site
It is fixed, steel nail implantation human body also needs to take out and can be connected with skeleton afterwards for a period of time, and skeleton intensity is very big
It will lead to bone screw to be difficult to take out, the method usually taken out is to rotate by using screwdriver in the end of bone screw, is made
The threaded function for obtaining bone screw is displaced outwardly, and is easy to break disconnected steel nail since bone strength is excessive, usually will appear synthetism spiral shell
The inside of nail is closely connect with bone, and the feelings that the outside of bone screw then follows screwdriver rotation that bone screw is caused to be broken
Condition just needs to be cut off a part of bone and bone screw together with core drill if there is fracture, this causes bone secondary again
Damage is serious.
Summary of the invention
In view of the shortcomings of the prior art, providing a kind of medical nail-fetching device, this kind of medical nail-fetching device can guarantee the utility model
The case where stress is consistent when bone screw takes out, and bone screw is prevented to be broken.
In order to solve the above-mentioned technical problem, the utility model is addressed by following technical proposals: one kind is medical to take nail
Device, the tapered rod of cutting bar, middle part including front end and the handle of tail portion, the cutting bar, tapered rod and middle handle
It is equipped with channel of chip removal, the cutting bar front end is provided with cutting edge, and promising polygon sliding part is arranged in the handle front end,
Sliding sleeve is equipped with sliding sleeve on the polygon sliding part, and the sliding sleeve outer edge is the hexagon cooperated with bone screw.
It using this kind of nail-fetching device when taking out bone screw, can penetrate into bone screw, lead to from the centre bore of bone screw end
The new resected bone that grows of bone screw centre bore will be embedded in by crossing rotatable handle, by sliding sleeve be moved to outside bone screw in
Then hexagonal groove cooperation rotates nail-fetching device and takes out bone screw, since the new bone that insertion bone screw centre bore is grown is cut
It removes, bone screw can be effectively prevent to be broken.
In above-mentioned technical proposal, it is preferred that be provided with several retention beads on the tapered rod, the retention bead is in spine
Colyliform is evenly distributed on the tapered rod.Cooperated by the groove inside retention bead and bone screw and rotated, by synthetism spiral shell
Nail rotates integrally, and due to bone screw entirety stress, bone screw can be effectively prevent to be broken.
In above-mentioned technical proposal, it is preferred that the cutting direction phase of the fastened orientation of the retention bead and the cutting edge
Instead.Using the structure, when being cut, retention bead will not be clasped, and can be guaranteed smooth when cutting.
The utility model compared with prior art, has the following beneficial effects: and is taking out synthetism spiral shell using this kind of nail-fetching device
It when nail, can penetrate into bone screw from the centre bore of bone screw end, will be embedded in bone screw by rotatable handle
Sliding sleeve is moved to and cooperates with the interior hexagonal groove outside bone screw by the new resected bone that heart hole is grown, and then rotation takes nail
Device takes out bone screw, since the new bone that insertion bone screw centre bore is grown is removed, bone screw can be effectively prevent disconnected
It splits.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of the utility model embodiment.
Fig. 2 is schematic cross-sectional view when the utility model embodiment takes nail.
Fig. 3 is the cross section structure schematic diagram of the utility model embodiment.
Specific embodiment
The utility model is described in further detail with specific embodiment with reference to the accompanying drawing: referring to Fig. 1 to Fig. 3,
A kind of medical nail-fetching device, the tapered rod 2 of cutting bar 1, middle part including front end and the handle 3 of tail portion, the cutting bar 1, cone
It is equipped with channel of chip removal 4 in the middle part of shape bar 2 and handle 3,1 front end of cutting bar is provided with cutting edge 5, before the handle 3
Promising polygon sliding part 7 is arranged in end, and sliding sleeve is equipped with sliding sleeve 8,8 outside of sliding sleeve on the polygon sliding part 7
Edge is the hexagon cooperated with bone screw.It, can be from bone screw end using this kind of nail-fetching device when taking out bone screw
Centre bore penetrate into bone screw, the new resected bone that grows of bone screw centre bore will be embedded in by rotatable handle, will be slided
Dynamic set is moved to be cooperated with the interior hexagonal groove outside bone screw, is then rotated nail-fetching device and is taken out bone screw, due to insertion
The new bone that bone screw centre bore is grown is removed, and bone screw can be effectively prevent to be broken.
Several retention beads 6 are provided on the tapered rod 2, the retention bead 6 is evenly distributed on described in ratchet-like
On tapered rod 2.Cooperated by the groove inside retention bead and bone screw and rotated, bone screw rotated integrally, due to connecing
Bone screws entirety stress, can effectively prevent bone screw to be broken.
The fastened orientation of the retention bead 6 is opposite with the cutting direction of the cutting edge 5.It is being cut using the structure
Retention bead will not clasp when cutting, and can guarantee smooth when cutting.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821021969.7U CN208876733U (en) | 2018-06-29 | 2018-06-29 | A medical nail remover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821021969.7U CN208876733U (en) | 2018-06-29 | 2018-06-29 | A medical nail remover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208876733U true CN208876733U (en) | 2019-05-21 |
Family
ID=66505872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821021969.7U Expired - Fee Related CN208876733U (en) | 2018-06-29 | 2018-06-29 | A medical nail remover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208876733U (en) |
-
2018
- 2018-06-29 CN CN201821021969.7U patent/CN208876733U/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: 20190521 Termination date: 20210629 |