CN204072296U

CN204072296U - Expandable nail special sleeve tool for same in orthopaedics marrow

Info

Publication number: CN204072296U
Application number: CN201420572546.XU
Authority: CN
Inventors: 侯培勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-10-03
Filing date: 2014-10-03
Publication date: 2015-01-07
Anticipated expiration: 2024-10-03

Abstract

This utility model relates to a kind of special sleeve tool for same matched with expandable nail in orthopaedics marrow, it is characterized in that having inside and outside two sleeve barrel tools to be nested together, namely, the cylinder bar of inner sleeve is through outer sleeve cylinder bar inner chamber, respectively there are the six square set heads be fixedly connected with inside and outside sleeve cylinder bar front end, the size of two six square set heads is corresponding with inside and outside six side's screw sockets of expandable nail in orthopaedics, and the length of small-bore sleeve cylinder bar is greater than the length of heavy caliber six square socket, and cylinder rod rear end respectively has rotating handles.In the orthopaedics marrow of the design, expandable nail special sleeve tool for same structure is simple, can be exclusively used in the interior expansive working of expandable nail in orthopaedics marrow, use the interior expansion that can realize intramedullary pin quickly and fix, safe and reliable, does not have sequela.

Description

Expandable nail special sleeve tool for same in orthopaedics marrow

Technical field

This utility model relates to a kind of surgical medical equipment, especially a kind of special sleeve tool for same matched with expandable nail in orthopaedics marrow.

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 higher-strength of should having asked, is safe from harm to human body again, can be absorbed by the body, and material is very difficult to be looked for.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, expandable nail special sleeve tool for same in a kind of orthopaedics marrow is provided, expandable nail in the orthopaedics marrow using this particular design, regulate the forward part of this expandable nail to be realized in intramedullary cavity expanding by screw when performing the operation and fix, safe and reliable, fast, sequela is not had.

This utility model solves the technical scheme that its technical problem adopts:

Expandable nail special sleeve tool for same in orthopaedics marrow, it is characterized in that having inside and outside two sleeve barrel tools to be nested together, namely, the cylinder bar of inner sleeve is through outer sleeve cylinder bar inner chamber, respectively there are the six square set heads be fixedly connected with inside and outside sleeve cylinder bar front end, the size of two six square set heads is corresponding with inside and outside six side's screw sockets of expandable nail in orthopaedics, and the length of small-bore sleeve cylinder bar is greater than the length of heavy caliber six square socket, and cylinder rod rear end respectively has rotating handles.

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, and two six square sockets do rightabout and rotate, or, after being in place by this intramedullary pin, grip large six square sockets on the other hand motionless, little six square sockets of positive rotation, the sliver of rivet nut front portion can be opened, and reach the effect of expansion internal fixtion.

Expandable nail in orthopaedics marrow, 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.

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.

In the orthopaedics marrow of the design, expandable nail special sleeve tool for same structure is simple, can be exclusively used in the interior expansive working of expandable nail in orthopaedics marrow, use the interior expansion that can realize intramedullary pin quickly and fix, safe and reliable, does not have sequela.

Accompanying drawing explanation

The cross-sectional section structure schematic diagram of the intramedullary pin of Fig. 1 involved by this utility model;

The intramedullary pin rearward end structural representation of Fig. 2 involved by this utility model;

Fig. 3 is expandable nail special sleeve tool for same structural representation in this utility model orthopaedics marrow;

The intramedullary pin mounting structure schematic diagram of Fig. 4 involved by 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, expandable nail in the orthopaedics marrow of 12. the design.

Detailed description of the invention

Expandable nail in orthopaedics marrow, 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

1. expandable nail special sleeve tool for same in orthopaedics marrow, it is characterized in that having inside and outside two sleeve barrel tools to be nested together, namely, the cylinder bar of inner sleeve is through outer sleeve cylinder bar inner chamber, respectively there are the six square set heads be fixedly connected with inside and outside sleeve cylinder bar front end, the size of two six square set heads is corresponding with inside and outside six side's screw sockets of expandable nail in orthopaedics, and the length of small-bore sleeve cylinder bar is greater than the length of heavy caliber six square socket, and cylinder rod rear end respectively has rotating handles.