CN202960737U

CN202960737U - Kirschner wire tail end locking device

Info

Publication number: CN202960737U
Application number: CN 201220681269
Authority: CN
Inventors: 王坤; 夏慧
Original assignee: Jinshan Hospital of Fudan University
Current assignee: Jinshan Hospital of Fudan University
Priority date: 2012-12-11
Filing date: 2012-12-11
Publication date: 2013-06-05
Anticipated expiration: 2022-12-11

Abstract

The utility model discloses a kirschner wire tail end locking device which comprises a four-piece hollow screw, a hollow drill bit used with the four-piece hollow screw in a matched mode and a hollow cross screwdriver. The four-piece hollow screw is composed of a screw tail nut and a screw body which are molded in an integrated mode. The screw body is hollow and used for a kirschner wire to penetrate through, and the screw tail nut is used for the hollow cross screwdriver to hold and screw in. the hollow drill bit is used for drilling a position counterbore in the kirschner wire, and the position counterbore is used for the four-piece hollow screw to screw in. the four-piece hollow screw is thin in the far end, and thick in the near end, and in a four-piece shape. When the hollow cross screwdriver screws in a screw along the kirschner wire, due to extrusion of peripheral sclerotin, the screw body in a four-piece shape is folded to the kirschner wire until the kirschner wire is locked. The kirschner wire tail end locking device can effectively reduce occurrence rate of loosening, slipping of the kirschner wire and exposure of the tail needle.

Description

Kirschner wire tail end locking device

Technical field

This utility model belongs to clinical medicine, and the medical device in bone surgery relates in particular to a kind of Kirschner wire tail end locking device.

Background technology

Kirschner wire is a kind of Orthopedic Clinical internal fixation material commonly used, and its former specification generally is fixed on 20 centimeters left and right, and diameter has different several specifications between the 1.0-3.0 millimeter.Kirschner wire is used for short and small fracture or the little fracture fixation of avulsion fracture iso-stress.The fixing advantage of Kirschner wire is Wicresoft, and is simple to operate, operation safety, and expense is low.Shortcoming is along with bone absorption around Kirschner wire, and needle body is loosening, slippage, and it is higher that backshank exposes incidence rate.

Summary of the invention

The technical problems to be solved in the utility model is to provide a kind of Kirschner wire tail end locking device, and is simple to operate, can coordinate the Kirschner wire of using clinically at present to use, and it is loosening effectively to reduce the Kirschner wire needle body, slippage, the incidence rate that backshank exposes.

For solving the problems of the technologies described above, this utility model provides a kind of Kirschner wire tail end locking device, and it comprises the pintongs hollow screw, and hollow boring bit matching used with it, hollow Phillips screwdriver; Described pintongs hollow screw is comprised of screw tail cap and screw rivet nut, and this screw tail cap and this screw rivet nut are one-body molded; Described screw rivet nut is hollow, penetrates for Kirschner wire; Described screw tail cap is controlled and is screwed in for described hollow Phillips screwdriver; Described hollow boring bit is used in the reaming of Kirschner wire implantation position, and this hole screws in for described pintongs hollow screw.

The length of described screw rivet nut (being the length of pintongs hollow screw) is 4-10mm, and diameter is 1.0mm, 1.5mm, 2.0mm, 2.5mm or 3.0mm, and is supporting with present routine clinical use Kirschner wire.

It is thin that the screw rivet nut of described pintongs hollow screw is far-end, and near-end is thick, and the surface of this screw rivet nut has screw thread.

Described screw tail cap is the pintongs shape, between this pintongs, the space is arranged, and it is inner that this space extends to the screw rivet nut, and the length in this space is 3/4 of whole screw rivet nut length.

Compared to the prior art, the present invention has following beneficial effect: this utility model is simple in structure, simple to operate, the pintongs hollow screw can effectively tighten Kirschner wire after screwing in, and screw has screw thread, than the smooth needle body of Kirschner wire can with comparatively stable fixing of New bone formation on every side, can effectively reduce the Kirschner wire needle body loosening, the incidence rate that slippage, backshank expose.

Description of drawings

Figure 1A is the front view of the pintongs hollow screw of this utility model Kirschner wire tail end locking device;

Figure 1B is the top view of the pintongs hollow screw of this utility model Kirschner wire tail end locking device;

Fig. 2 A is the front view before the pintongs hollow screw of this utility model Kirschner wire tail end locking device screws in;

Fig. 2 B is the top view before the pintongs hollow screw of this utility model Kirschner wire tail end locking device screws in;

Fig. 2 C is the front view after the pintongs hollow screw of this utility model Kirschner wire tail end locking device screws in;

Fig. 2 D is the top view after the pintongs hollow screw of this utility model Kirschner wire tail end locking device screws in;

Fig. 3 A is the cutaway view of Fig. 2 A rotation 45 degree;

Fig. 3 B is the cutaway view of Fig. 2 C rotation 45 degree;

Description of reference numerals is as follows:

The 1st, the skeleton of fracture, the 2nd, Kirschner wire, the 3rd, pintongs hollow screw, the 31st, screw tail cap, the 32nd, screw rivet nut, the 4th, space.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

A kind of Kirschner wire tail end of this utility model locking device comprises the pintongs hollow screw, and hollow boring bit matching used with it, hollow Phillips screwdriver; As shown in Figure 1A and Figure 1B, pintongs hollow screw 3 is comprised of screw tail cap 31 and screw rivet nut 32, and this screw tail cap 31 and this screw rivet nut 32 are one-body molded; The surface of this screw rivet nut 32 has screw thread.Screw rivet nut 32 is hollow, penetrates for Kirschner wire 2; Screw tail cap 31 is controlled and is screwed in for described hollow Phillips screwdriver; Hollow boring bit is used for the position reaming at the skeleton 1 of Kirschner wire 2 implantation fractures, and this hole screws in for described pintongs hollow screw 3.With the matching used hollow boring bit of pintongs hollow screw and hollow Phillips screwdriver be this area conventional products, all can buy on market.

As shown in Figure 1A and Figure 1B, it is thin that the screw rivet nut 32 of pintongs hollow screw 3 of the present utility model is far-end, near-end is thick, screw tail cap 31 is the pintongs shape, and space 4 is arranged between this pintongs, and this space 4 extends to screw rivet nut 32 inside, the length in this space 4 is that the 3/4(of whole screw rivet nut 32 length sees Fig. 2 A, Fig. 2 C, Fig. 3 A, Fig. 3 B).The length of screw rivet nut 32 is 4-10mm, and diameter is 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, and is supporting with present routine clinical use Kirschner wire.Before the hollow Phillips screwdriver of use screws in pintongs hollow screw 3 along Kirschner wire, larger space (seeing Fig. 2 A, Fig. 2 B, Fig. 3 A) is arranged between the pintongs of pintongs hollow screw 3; When using hollow Phillips screwdriver to screw in screw along Kirschner wire, due to sclerotin extruding on every side, the rivet nut that is pintongs can be drawn in to Kirschner wire, until the chucking Kirschner wire can't continue to screw in (seeing Fig. 2 C, Fig. 2 D, Fig. 3 B), can reach the purpose of locking Kirschener wire.

Concrete operation method is as follows: after Kirschner wire was implanted sclerotin, the hollow boring bit reaming that supporting this area is commonly used under the Kirschner wire guiding, used this area hollow Phillips screwdriver commonly used that supporting pintongs hollow screw is screwed in, until screw, Kirschner wire is stuck by screw.Tail end exposes Kirschner wire to be cut off and gets final product.

This utility model is simple to operate, and the pintongs hollow screw can effectively tighten Kirschner wire after screwing in, and screw has screw thread, than the smooth needle body of Kirschner wire can with comparatively stable fixing of New bone formation on every side, can effectively reduce the Kirschner wire needle body loosening, slippage, the incidence rate that backshank exposes.

Claims

1. a Kirschner wire tail end locking device, is characterized in that, comprises the pintongs hollow screw, and hollow boring bit matching used with it, hollow Phillips screwdriver; Described pintongs hollow screw is comprised of screw tail cap and screw rivet nut, and this screw tail cap and this screw rivet nut are one-body molded; Described screw rivet nut is hollow, penetrates for Kirschner wire; Described screw tail cap is controlled and is screwed in for described hollow Phillips screwdriver; Described hollow boring bit is used in the reaming of Kirschner wire implantation position, and this hole screws in for described pintongs hollow screw.

2. Kirschner wire tail end locking device as claimed in claim 1, is characterized in that, the length of described screw rivet nut is 4-10mm, and diameter is 1.0mm, 1.5mm, 2.0mm, 2.5mm or 3.0mm, and is supporting with present routine clinical use Kirschner wire.

3. Kirschner wire tail end locking device as claimed in claim 1, is characterized in that, it is thin that the screw rivet nut of described pintongs hollow screw is far-end, and near-end is thick, and the surface of this screw rivet nut has screw thread.

4. Kirschner wire tail end locking device as claimed in claim 1, is characterized in that, described screw tail cap is the pintongs shape, between this pintongs, the space is arranged, and it is inner that this space extends to the screw rivet nut, and the length in this space is 3/4 of whole screw rivet nut length.