CN204072302U - A kind of orthopaedics expandable nail - Google Patents
A kind of orthopaedics expandable nail Download PDFInfo
- Publication number
- CN204072302U CN204072302U CN201420572814.8U CN201420572814U CN204072302U CN 204072302 U CN204072302 U CN 204072302U CN 201420572814 U CN201420572814 U CN 201420572814U CN 204072302 U CN204072302 U CN 204072302U
- Authority
- CN
- China
- Prior art keywords
- rivet nut
- inner chamber
- screw
- orthopaedics
- expandable nail
- 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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- Surgical Instruments (AREA)
Abstract
This utility model relates to a kind of orthopaedics expandable nail, comprise rivet nut, rivet nut has inner chamber, have screw roller to pass in inner chamber, the forward part inner chamber of rivet nut is bell mouth shape, has the tapered cup nut matched to match with screw roller in horn mouth, rivet nut front portion has longitudinal open-minded seam rivet nut front portion to be separated into three or four slivers of can opening a business, there is screw socket the rear end of rivet nut, and rivet nut rear end inner chamber has recessed expansion platform, and the screw rod rearward end of stretching out from inner chamber also has screw socket to be on expansion platform.The design's structure is simple, can use general orthopaedics titanium alloy material, is easy to processing, uses the interior expansion that can realize intramedullary pin quickly and fix, safe and reliable, does not have sequela.
Description
Technical field
This utility model relates to a kind of surgical medical equipment, especially a kind of orthopaedics expandable nail.
Background technology
Fracture is fixedly common surgical by titanium plate or screw.In fracture of the femoral head operation, sometimes need to use intramedullary pin, patent report is had to use intramedullary expansion intramedullary pin effective, see Chinese Patent Application No. 2013200398556, the scheme of its invention is: be designed to by the first half of intramedullary pin several from a type intramedullary pin, comprise rivet nut, the head of a nail, rivet nut front end bifurcated, form two or more and have the flexure strip flicking trend laterally, each flexure strip is drawn in by the fixed cover being easy to dissolve or soften and is fixed together.Like this, when operation technique, first bone passage is set up, again the rivet nut in this utility model is squeezed into from bone passage, after rivet nut is squeezed into, the fixed cover on flexure strip and bioresorbable soften or dissolve, and flexure strip opens voluntarily under the tension force effect of self opening trend laterally, form the support nail structure of many different directions, to playing the effect strengthened and be connected and fixed between near end of thighbone end face.Its wrong point is that one be soluble fixed cover is generally chemical solvable dispergation, and this brood lac comparatively high bond strength of should having asked, is safe from harm to human body again, can be absorbed by the body, and material is very rare.Even if people's physical ability absorbs, also can slowly, and also how many people knows from experience and has rejection to it, can be applied to reality hardly.Two is be difficult to realize self expandable in the loose sclerotin of pulp cavity from tension force (tension force should be not too large) only by intramedullary pin front elastic sheet, and must need special titanium alloy material, general orthopaedics titanium alloy elastic is so not good.
Summary of the invention
Wood utility model will solve above-mentioned prior art Problems existing, provides a kind of orthopaedics expandable nail, regulates the forward part of this expandable nail to be realized in intramedullary cavity expanding fix when performing the operation by screw, safe and reliable, fast, does not have sequela.
This utility model solves the technical scheme that its technical problem adopts: a kind of orthopaedics expandable nail, comprise rivet nut, rivet nut is hollow structure, screw roller is had to pass in inner chamber, the forward part inner chamber of rivet nut is bell mouth shape, the tapered cup nut matched is had to match with screw roller in horn mouth, rivet nut front portion has longitudinal open-minded seam rivet nut front portion to be separated into three or four slivers of can opening a business, there is screw socket the rear end of rivet nut, rivet nut rear end inner chamber has recessed expansion platform, and the screw rod rearward end external diameter stretched out from inner chamber is greater than rivet nut intracavity diameter and has screw socket to be on expansion platform.
Screw rod between described screw rod screw socket and expansion platform overlaps and has packing ring.
Described rivet nut screw socket and screw rod screw socket are outer six sides.
Described the first transaction of a day's business sliver root has the breach of transverse section, so that the expansion of sliver.
The design needs special sleeve barrel tool, substantially: outer six square socket inner sleeves have small-bore outer six square sockets, the length of small-bore sleeve is greater than the length of heavy caliber six square socket, like this, six square set heads of two sleeves can entangle the rivet nut of the design and six side's screw sockets of screw rod rear end simultaneously respectively, two six square sockets do rightabout and rotate, or, after this intramedullary pin is in place, grip large six square sockets on the other hand motionless, little six square sockets of positive rotation, can open the sliver of rivet nut front portion, and reach the effect of expansion internal fixtion.
The design's structure is simple, can use general orthopaedics titanium alloy material, is easy to processing, uses the interior expansion that can realize intramedullary pin quickly and fix, safe and reliable, does not have sequela.
Accompanying drawing explanation
Fig. 1 is the cross-sectional section structure schematic diagram of this utility model;
Fig. 2 is this utility model rearward end structural representation;
Fig. 3 is the six square socket tool construction schematic diagrams supporting with this utility model.
In figure, a 1. hole, 2. tapered cup nut, 3. screw rod, 4. the first transaction of a day's business sliver, 5. crack, 6. rivet nut, 7. large six side's screw socket, 8. packing rings, 9. little six side's screw socket, 10. outer sleeves, 11. inner sleeves, a kind of orthopaedics expandable nail of 12. the design.
Detailed description of the invention
A kind of orthopaedics expandable nail, comprise rivet nut 6, rivet nut 6 has inner chamber, have screw roller 3 to pass in inner chamber, the forward part inner chamber of rivet nut 6 is bell mouth shape, has the tapered cup nut 2 matched to match with screw roller 3 in horn mouth, rivet nut 6 front portion has longitudinal open-minded seam rivet nut front portion to be separated into three or four slivers 4 of can opening a business, there are large six side's screw sockets 7 rear end of rivet nut, and rivet nut rear end inner chamber has recessed expansion platform, and the screw rod rearward end of stretching out from inner chamber also has little six side's screw sockets 9 to be on expansion platform; Screw rod between described screw rod screw socket and expansion platform overlaps and has packing ring 8; Described the first transaction of a day's business sliver 4 root has the breach of transverse section, so that the expansion of sliver.
Claims (4)
1. an orthopaedics expandable nail, comprise rivet nut, it is characterized in that rivet nut is hollow structure, screw roller is had to pass in inner chamber, the forward part inner chamber of rivet nut is bell mouth shape, the tapered cup nut matched is had to match with screw roller in horn mouth, rivet nut front portion has longitudinal open-minded seam rivet nut front portion to be separated into three or four slivers of can opening a business, there is screw socket the rear end of rivet nut, rivet nut rear end inner chamber has recessed expansion platform, and the screw rod rearward end external diameter stretched out from inner chamber is greater than rivet nut intracavity diameter and has screw socket to be on expansion platform.
2. a kind of orthopaedics expandable nail as claimed in claim 1, is characterized in that the screw rod between described screw rod screw socket and expansion platform overlaps have packing ring.
3. a kind of orthopaedics expandable nail as claimed in claim 1 or 2, is characterized in that described rivet nut screw socket and screw rod screw socket are outer six sides.
4. a kind of orthopaedics expandable nail as claimed in claim 1, the first transaction of a day's business sliver root that it is characterized in that described has the breach of transverse section, so that the expansion of sliver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420572814.8U CN204072302U (en) | 2014-10-06 | 2014-10-06 | A kind of orthopaedics expandable nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420572814.8U CN204072302U (en) | 2014-10-06 | 2014-10-06 | A kind of orthopaedics expandable nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204072302U true CN204072302U (en) | 2015-01-07 |
Family
ID=52165074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420572814.8U Expired - Fee Related CN204072302U (en) | 2014-10-06 | 2014-10-06 | A kind of orthopaedics expandable nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204072302U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107028649A (en) * | 2017-05-23 | 2017-08-11 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | One kind is used for sufferers of osteoporosis face screw and strengthens fixing device |
-
2014
- 2014-10-06 CN CN201420572814.8U patent/CN204072302U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107028649A (en) * | 2017-05-23 | 2017-08-11 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | One kind is used for sufferers of osteoporosis face screw and strengthens fixing device |
| CN107028649B (en) * | 2017-05-23 | 2024-03-26 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | Screw reinforcing and fixing device for osteoporosis patient |
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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: 20150107 Termination date: 20151006 |
|
| EXPY | Termination of patent right or utility model |