CN204121149U - A kind of intramedullary pin - Google Patents
A kind of intramedullary pin Download PDFInfo
- Publication number
- CN204121149U CN204121149U CN201420410682.9U CN201420410682U CN204121149U CN 204121149 U CN204121149 U CN 204121149U CN 201420410682 U CN201420410682 U CN 201420410682U CN 204121149 U CN204121149 U CN 204121149U
- Authority
- CN
- China
- Prior art keywords
- intramedullary pin
- ratchet mechanism
- special
- screw rod
- intramedullary
- 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 kind of intramedullary pin, relate to a kind of medical apparatus and instruments inner fixing device intramedullary pin of human bone marrow's intracavity.Intramedullary needle treatment fracture can not solve bone length cripetura problem, without Limb lengthening function now.This intramedullary pin primary structure is by the female intramedullary pin pipe (1) of tool, there is externally threaded intramedullary pin screw rod (2) and special-shaped ratchet mechanism (3) composition, top major part screw rod time initial with external screw thread intramedullary pin screw rod (2) screws in be had in female thread intramedullary pin pipe (1), its underpart end inserts in the ratchet hole of special-shaped ratchet mechanism (3), by repeatedly rotating to specific direction and reversely rotating special-shaped ratchet mechanism (3), abnormity ratchet mechanism (3) drive has external screw thread intramedullary pin screw rod (2) and has female thread intramedullary pin pipe (1) rotation, make its whole intramedullary pin extension, can be used as Limb lengthening, fracture instruments.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments metal inner fixing device intramedullary pin of human bone marrow's intracavity.
Technical background
Intramedullary pin is a kind of inner fixing device of human bone marrow's intracavity, the conventional medical apparatus and instruments for the treatment of fracture.Intramedullary pin is positioned at medullary cavity to be coupled together by the long bone after fracture by intramedullary pin body and pinning, has and make sclerite para-position to line, fixing, supports the function of certain gravity, in order to growth of spur union of fracture.Prior art Shortcomings problem is: after fracture, has part long bone to have Cranial defect to damage, the cripetura of long bone length, and after fracture healing, this long bone length is comparatively fractured front cripetura.Due to intramedullary pin now without extension function so can not treat during treatment fracture and solve cripetura problem; Domesticly now there is no a kind of intramedullary pin with Limb lengthening function, be namely applied to the intramedullary pin that long bone extends.
Summary of the invention
This utility model carries out improvement and bring new ideas for above-mentioned technical problem, and intending provides a kind of intramedullary pin having extension function, is applied to fracture and the Limb lengthening treatment of long bone.
For this reason, the technical scheme that this utility model adopts is: intramedullary pin comprises the female intramedullary pin pipe (1) of tool, there is externally threaded intramedullary pin screw rod (2) and special-shaped ratchet mechanism (3), described special-shaped ratchet mechanism (3) is combined into one by square or round metal rod (3a) and the ratchet on it (3b), it is characterized in that: described external screw thread intramedullary pin screw rod (2) the top screw-in that has has in female thread intramedullary pin pipe (1), it has external screw thread intramedullary pin screw rod (2) bottom hexagonal tail end (2a) and inserts in the ratchet hole (3b) of special-shaped ratchet mechanism (3), the intramedullary pin pipe (1) of the female thread of intramedullary pin is fixed on the epimere in medullary cavity by pinning (4), abnormity ratchet mechanism (3) is fixed on the hypomere inwall in medullary cavity, by repeatedly rotating to specific direction and reversely rotating special-shaped ratchet mechanism (3), drive has external screw thread intramedullary pin screw rod (2) and has female thread intramedullary pin pipe (1) rotation, its whole intramedullary pin is extended, to realize the extension function object of intramedullary pin.
Useful effect and feature are that this utility model is by repeatedly rotating to specific direction and reversely rotating abnormity.Time ratchet mechanism (3), drive and there is external screw thread intramedullary pin screw rod (2) having rotation in female thread intramedullary pin pipe (1), its whole intramedullary pin is extended, to realize the extension function object of intramedullary pin.
Accompanying drawing explanation
Fig. 1 structure chart of the present utility model
Fig. 2 part drawing of the present utility model
Fig. 3 design sketch of the present utility model
Specific embodiments
Below by embodiment, also the utility model is described in further detail by reference to the accompanying drawings: shown in composition graphs, intramedullary pin is in medullary cavity, it is by the female intramedullary pin pipe (1) of tool, there is intramedullary pin screw rod (2) and special-shaped ratchet mechanism (3) the three part composition of outer silk screw thread, having outer silk thread intramedullary pin screw rod (2) top major part screw-in during original state has in female thread intramedullary pin pipe (1), its underpart hexagonal tail end (2a) is inserted in the ratchet hole (3b) of special-shaped ratchet mechanism (3), the intramedullary pin pipe (1) of the female thread of intramedullary pin is fixed on the epimere in medullary cavity by pinning (4), abnormity ratchet mechanism (3) is fixed on the hypomere inwall in medullary cavity, the hypomere of bone is rotated in vitro to specific direction, drive special-shaped ratchet mechanism (3), then drive and there is external screw thread intramedullary pin screw rod (2) having female thread intramedullary pin pipe (1) in rotation, make its whole intramedullary pin extending length, then the hypomere of bone is reversely rotated in vitro, special-shaped ratchet mechanism (3) is driven oppositely to circle round, operation principle due to ratchet mechanism has external screw thread intramedullary pin screw rod (2) and can not circle round, it is transfixion in the female intramedullary pin pipe (1) of tool.Again repeat the hypomere rotating bone in vitro to specific direction, drive special-shaped ratchet mechanism (3), then can drive have external screw thread intramedullary pin screw rod (2) have in female thread intramedullary pin pipe (1) rotate, make its whole intramedullary pin extending length again, the hypomere of forward and reverse rotation bone drives special-shaped ratchet mechanism to rotate so repeatedly, thus make that there is external screw thread intramedullary pin screw rod (2) intermittent rotary repeatedly, intramedullary pin extends gradually, drives long bone to extend gradually.
Claims (4)
1. an intramedullary pin, comprise the female intramedullary pin pipe (1) of tool, there is externally threaded intramedullary pin screw rod (2) and special-shaped ratchet mechanism (3), it is characterized in that: described external screw thread intramedullary pin screw rod (2) the top screw-in that has has in female thread intramedullary pin pipe (1), it has external screw thread intramedullary pin screw rod (2) bottom tail end and inserts in the ratchet hole of special-shaped ratchet mechanism (3), by repeatedly rotating to specific direction and reversely rotating special-shaped ratchet mechanism (3), drive have external screw thread intramedullary pin screw rod (2) have in female thread intramedullary pin pipe (1) rotate, its whole intramedullary pin is extended, the long bone that band is automatically connected in intramedullary pin two ends extends.
2. according to intramedullary pin according to claim 1, it is characterized in that: described special-shaped ratchet mechanism (3) is fixed with one by square or round metal rod (3a) and its ratchet (3b) be arranged on wherein, forms a special-shaped ratchet mechanism.
3. intramedullary pin according to claim 1, is characterized in that the intramedullary pin pipe (1) of female thread is fastened in the medullary cavity of long bone by pinning (4).
4. intramedullary pin according to claim 1, is characterized in that described special-shaped ratchet mechanism (3) is fastened on the medullary cavity inwall of long bone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420410682.9U CN204121149U (en) | 2014-07-21 | 2014-07-21 | A kind of intramedullary pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420410682.9U CN204121149U (en) | 2014-07-21 | 2014-07-21 | A kind of intramedullary pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204121149U true CN204121149U (en) | 2015-01-28 |
Family
ID=52377544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420410682.9U Expired - Fee Related CN204121149U (en) | 2014-07-21 | 2014-07-21 | A kind of intramedullary pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204121149U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113197631A (en) * | 2021-04-14 | 2021-08-03 | 无锡市第九人民医院 | Interlocking intramedullary nail applicable to metaphysis fracture bone defect |
-
2014
- 2014-07-21 CN CN201420410682.9U patent/CN204121149U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113197631A (en) * | 2021-04-14 | 2021-08-03 | 无锡市第九人民医院 | Interlocking intramedullary nail applicable to metaphysis fracture bone defect |
| CN113197631B (en) * | 2021-04-14 | 2022-07-12 | 无锡市第九人民医院 | Interlocking intramedullary nail applicable to metaphysis fracture bone defect |
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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: 20150128 Termination date: 20170721 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |