CN2301178Y

CN2301178Y - Needle extraction device

Info

Publication number: CN2301178Y
Application number: CN 97237205
Authority: CN
Inventors: 陶启冬
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-12
Filing date: 1997-06-12
Publication date: 1998-12-23
Anticipated expiration: 2007-06-12

Abstract

The utility model relates to a bone surgery device for picking intramedullary needles. The utility model is mainly composed of a rotary handle 1, a threaded rod 3, a nut 8, a supporter 2 and a needle hook 7, and the threaded rod 3 is connected with the needle hook 7. Larger axial tension is generated by minor torque according to the screw drive principle, the threaded rod 3 rises by the driving of the axial tension, and the intramedullary needle is pulled out from the marrow cavity with the needle hook 7. The needle extraction device has the characteristics of labour saving, high safety, stability and noiselessness. The needle hook is not easy to damage, and the time and cost of the operation are saved.

Description

A kind of pin extractor

This utility model relates to a kind of bone surgery set, and specifically, it relates to a kind of operating theater instruments that is used to win intramedullary needle.

Intramedullary needle is a bone surgery apparatus commonly used, after the reduction of the fracture it is inserted medullary cavity knochenbruch is played fixation, needs operation to take out after the knochenbruch healing.The existing known pin extractor that is used to win intramedullary needle, primary structure is the telescopic cylindrical steel column of an outer steel pipe, steel column one end connects pinhock, the other end is connected with the shelves ring, sleeve is shorter, can on steel column, slidably reciprocate, when winning intramedullary needle, pinhock is hung on the pin hole of intramedullary needle afterbody, hold guide then and firmly slide to the shelves ring from the pinhock end, the guide end face fiercely knocks the shelves ring, knocks so repeatedly, shelves ring forced vibration withdraws from medullary cavity gradually by steel column and the pinhock traction intramedullary needle that links to each other.Owing to be interrupted the application of force, unbalance stress adopts this method the situation of pinhock fracture usually to occur, and the pinhock of having to frequently change has not only strengthened the operation cost, has also prolonged operating time.

The purpose of this utility model provides a kind of device of winning intramedullary needle, and its pinhock is not fragile, easy-to-operate, and it is rapid to finish the process of winning.

For achieving the above object, the technical solution that this utility model adopts is: utilize the worm drive principle, produce bigger axial tension by less moment of torsion, this pulling force drives screw rod and rises, and intramedullary needle steadily withdraws from from medullary cavity with the screw rod traction.This utility model is made of swing handle, screw rod, nut, bracing frame and pinhock.The axis of screw rod and bracing frame axis coincide, the bracing frame axis is provided with the hole, and screw rod is inserted in it, and pinhock links to each other with screw rod at the relative other end of swing handle place side, the rotation swing handle can make screw rod and nut generation relative motion, rises or descends with respect to bracing frame thereby drive screw rod.During operation technique, held the bracing frame bottom and be tight against apophysis portion or the tuberosity tuberal part of intramedullary needle around portalling by to be allowed its lower end by the assistant, the whole swing handle of operator hand adjustment hangs over pinhock on the pin hole of intramedullary needle, firmly rotates swing handle then, screw rod is risen, and intramedullary needle promptly is pulled out medullary cavity with pinhock.

Because such scheme has utilized the worm drive principle, has laborsaving, safe, steady, muting characteristics, during its operation, the pinhock stress equalization, easy fracture can not saved surgery cost, need not change pinhock in the operation, can shorten operating time, alleviate patient's misery.

Accompanying drawing is a structural representation of the present utility model.

Below in conjunction with accompanying drawing embodiment of the present utility model is further described.

As shown in the figure, this utility model is made of swing handle 1, screw rod 3, nut 8, bracing frame 2, slide block 5, pinhock 7, and swing handle 1 links to each other with screw rod 3, and integral body is " T " font structure, an end relative with swing handle 1 is provided with shelves ring 6 on the screw rod 3, in shelves ring 6 holes 11 that are enclosed within on the slide block 5.Pinhock 7 is connected with the mode of slide block 5 with thread connection, can certainly other movable connected mode be connected, and for example the pinhock afterbody can be designed to big head shapes, stub end is snapped in the hole of corresponding position on the slide block 5 to get final product.Bracing frame 2 is an elongate structure, and the axis of its axis and screw rod 3 coincides, and does not have screwed hole on the axis of bracing frame 2, and promptly nut 8, and nut 8 is complementary with screw rod 3.2 liang of inboards of bracing frame are provided with chute 10, and the slide plate 9 on the slide block 5 is entrapped in the chute 10, and slide plate 9 can slide up and down along chute 10.The effect that slide block 5 is set is to make pinhock 7 to be unlikely to and then screw rod 3 rotations.Handle 4 is fixed on both sides, bracing frame 2 bottom.

During operation technique, assistant's both hands are held handle 4, allow bracing frame 2 lower ends be tight against apophysis portion or the tuberosity tuberal part of intramedullary needle around portalling, the whole swing handle 1 of operator hand adjustment hangs over pinhock 7 on the pin hole of intramedullary needle, firmly rotate swing handle 1 then, screw rod 3 is risen, and intramedullary needle promptly is pulled out medullary cavity with pinhock 7.

Certainly, also can go out the pin extractor of another kind of structure according to above-mentioned principle design, the through hole on the bracing frame axis is passed in its screw rod upper end, be inserted in then in the nut that is fixed on the swing handle, the lower end directly links to each other with pinhock, swivel nut, screw rod is risen, and intramedullary needle promptly is pulled out medullary cavity with pinhock.

Claims

1, a kind of pin extractor, it comprises pinhock 7, it is characterized in that it also comprises: swing handle 1, screw rod 3, nut 8, bracing frame 2, the axis of screw rod 3 and bracing frame 2 axis coincide, screw rod 3 one ends link to each other with pinhock 7, and the other end passes the nut of being located on the bracing frame axis 8, and nut 8 is fixed on the bracing frame 2 or maintenance contacts with bracing frame 2, during rotation swing handle 1, can make screw rod 3 relative bracing frames 2 rise or descend;

2, pin extractor according to claim 1, its screw rod 3 lower ends are provided with slide block 5, and slide block 5 links to each other with screw rod 3;

3, according to claim 1 and the described pin extractor of claim 2,2 liang of inboards of its bracing frame are provided with chute 10, and slide block 5 can slide up and down along chute 10;

4, pin extractor according to claim 1, its both sides, bracing frame bottom are provided with handle 4.