CN2281162Y

CN2281162Y - Intramedullary nail

Info

Publication number: CN2281162Y
Application number: CN 96244547
Authority: CN
Inventors: 戚鸣
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-06
Filing date: 1996-12-06
Publication date: 1998-05-13
Anticipated expiration: 2006-12-06

Abstract

The utility model discloses an intramedullary nail. The side face of the nail body is provided with four screw holes, and the distance of the two left screw holes is equal with the distance of the two right screw holes. The tail of the nail body is provided with a nail taking hole for extracting the intramedullary nail. The utility model is positioned and perforated by a sighting device, and overcomes the disadvantages that the X-ray has harm to the body health of physicians and patients when the original perforation is conducted by an X-ray aiming sight. The operation is simple, the utility model can obtain good reposition and fixation for the comminuted and long oblique fracture, and good condition is created for the healing of the fracture.

Description

A kind of latch intramedullary pin

This utility model relates to a kind of latch intramedullary pin.

At present, in the internal fixation apparatus of fracture, intramedullary pin is to use one of more equipment; Because mostly the pulp cavity of tubular bone is irregular, thus intramedullary pin the treatment isthmus in addition fracture and when comminuted fracture or long oblique fracture, because of rotation and the cripetura that can't effectively control fracture end can not be used; Developed the latch intramedullary pin for this reason clinically again, needed to aim at intramedullary pin screwing hole when this intramedullary pin is packed into and could hole to pierce into the screw location by X line sight.This sight costs an arm and a leg, the operation more complicated, and doctor who works under roentgen radiation x and patient's health are subjected to the X wire spoke and penetrate infringement.

Order of the present utility model is to design in order to overcome above-mentioned weak point that the left and right distance that respectively is provided with two screw holes and the screw of packing into, the left side two screw holes of a kind of intramedullary pin nail body equals the distance of two screw holes in the right and be provided with the latch intramedullary pin of getting the nail hole at afterbody; There is not roentgen radiation x in the use, harmless, easy and simple to handle.

This utility model content, on the side of latch intramedullary pin nail body, be provided with four screw holes, screw (latch) is housed in the screw hole, and the distance of two screw holes of the distance of two screw holes in the left side and the right equates, the afterbody of this nail body be provided with extract the latch intramedullary pin get the nail hole.

The distance that is positioned at two screw holes at two ends in four screw holes on the latch intramedullary pin nail body is 60-120mm.

This utility model advantage is compared with used like product, because this intramedullary pin respectively has two screws to fix at the fracture two ends, can effectively control the rotation of fracture end and become the angle deformity, so the latch intramedullary pin is made slightly carefullyyer than pulp cavity, need not expand medullary cavity in the operation, avoids damaging interior periosteum; Because not using X line sight, no X wire spoke to penetrate can not damage doctor and patient's body health, operate also easier.This utility model obtains reduction with good and fixing for comminuted and long oblique fracture, for good condition has been created in the healing of fracture.

Description of drawings:

Fig. 1 is this utility model sketch map;

Fig. 2 is latch intramedullary pin nail body front view;

Fig. 3 is the side view of Fig. 2;

Fig. 4 is the sight structural representation;

Fig. 5 is the A-A cutaway view of Fig. 4;

Fig. 6 is used for the fracture view for sight;

Below in conjunction with description of drawings this utility model embodiment, the nail body 1 of latch intramedullary pin is a square pipe, the one side is provided with groove, relative net side at unslotted is provided with four screw holes 3,4,5,6, screw hole 3 and 4 distance equal the distance of screw hole 5 and 6, this distance is made as 20MM in the present embodiment, the left side of aforementioned four screw holes, the distance of two screw holes at right two ends is 80MM, these four screw holes are that drill jig is made with sight 13, the afterbody of latch intramedullary pin nail body be provided be used to extract this intramedullary pin get nail hole 7, this quantity of getting the nail hole is five, this is to consider from the longest latch intramedullary pin, be convenient to make in batches, when using short latch intramedullary pin, unnecessary nail tail can be cut so that follow closely tail and be embedded in subcutaneous.Sight is provided with the pilot hole that equates with the screw hole size and the spacing of latch intramedullary pin, because it is the mould of making the screw hole on the latch intramedullary pin and holing on the bone that fracture takes place, so the pitch-row required precision is higher, for the distance of pilot hole 9 and 10 and the distance of pilot hole 11 and 12, error requirements is less than 0.02MM.During clinical manipulation, earlier fracture is cut, but need not peel off outer periosteum, after fracture exposes, the nearside fracture segment of earlier the latch intramedullary pin being packed into, and the screw hole 5,6 of nail body is in this section aligns two pilot holes of sight and loads onto screw 2 and locate with the screw hole 3,4 of latch intramedullary pin, this moment, in addition two pilot holes of sight alignd with screw hole 5,6 in the nearside bone section, can hole; Then unloading sight and screw and the latch intramedullary pin drawn back fracture is resetted, then intramedullary pin is advanced in the fracture segment of distally, aligns in the hole of having got on screw hole 5,6 and bone, and whether the light inspection of available torch aligns; Load onto sight, two pilot holes of one end are alignd with the screw hole 5,6 of latch intramedullary pin and load onto screw, at this moment in addition two pilot holes of sight align with screw hole 3,4 on the latch intramedullary pin, boring is also loaded onto screw, owing on two sections bones of fracture, fix by two screws and latch intramedullary pin respectively, controlled the rotation and the angulation deformity of fracture effectively, obtained reduction with good and fixing, for good condition has been created in the healing of fracture.

Claims

1, a kind of latch intramedullary pin, the cross section of nail body is a square tube shape, on the nail body screw is housed, it is characterized in that: on the side of nail body, be provided with four screw holes, the distance of two screw holes of the distance of two screw holes in the left side and the right equates, the afterbody of nail body be provided be used to extract the latch intramedullary pin get the nail hole.

2, latch intramedullary pin as claimed in claim 1 is characterized in that: the distance of the screw hole that is positioned at two ends in four screw holes is 60-120mm.