CN2236290Y

CN2236290Y - External bone fixer with reducting and self pressing functions

Info

Publication number: CN2236290Y
Application number: CN 94213723
Authority: CN
Inventors: 杨春雷
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-02
Filing date: 1994-06-02
Publication date: 1996-10-02
Anticipated expiration: 2004-06-02

Abstract

The utility model provides an external fixing instrument for medical fracture treatment having the functions of reposition and automatic pressurization. The instrument is composed of two main arms, four left-right fixing blocks, steel needles, screw rods with traction function, etc. The utility model can reposite various displacements of fracture and correct deformity, and has the advantages of compact structure, and convenient regulation with low requirement for needle penetrating technique. In the middle and later stages of fracture, after regulating and connecting the screws of the main arms, a stress pressurizing function to the fracture end is generated, consequently avoiding the effect of stress shielding, and promoting the healing of bones.

Description

Have and reset and the automatic bone external fixator of pressurization function

This utility model is a kind of medical apparatus and instruments, promptly is a kind of human fracture's of treatment external fixation device.

The external fixator of existing treatment fracture is varied, as the Hoffmann formula, the domestic Meng and, Lee plays great formula, its each tool pluses and minuses.But generally speaking, itself otherwise too simple, do not possess multi-functional regulating action; Structure is too complicated, costs an arm and a leg, can not be extensive use of, and all to the specification requirement height of threading a needle.

And this utility model main purpose is to overcome above-mentioned shortcoming, increases new function.It is different from above-mentioned design, and it is to the miscellaneous fracture displacement rectification that all can reset, and is low to the specification requirement of threading a needle, under multi-functional situation, and simple structure.In early days, fracture end can strongly be fixed, middle and late stage can be flexible fastening, promotes fracture heals in early days.

Now specify structure of the present utility model and implementation process in conjunction with the accompanying drawings.

Fig. 1 is a structure chart of the present utility model.

Fig. 2 is principal arm 1 or 2 exploded views.

Fig. 3 is the ideograph of the fixing fracture of this utility model.

Fig. 4 is one of multiple constitutional diagram of the present utility model.

With reference to Fig. 1 and Fig. 2 as can be seen, this utility model is made up of principal arm 1 and 2, fixed block 3 (about 4), screw mandrel 4, draw point 5 and

screw

6,7,8,9 etc.Principal arm 1 and 2 has the list structure of dead slot in the middle of being, and end boring makes fixed block 3 can slide on principal arm 1,2, rotate or fixes.

Screw

6,7 is principal arm 1 and 2 fixedly, and loosening

screw

6,7 can make principal arm 1 do relative slip with 2.Fixed block 3 is " L " type, and its upper arm also has dead slot, and making fixedly, the porose screw 8 of draw point can slide on dead slot, rotate or be fixing; Its underarm is drilled with a hole, and screw 9 can be fixed on principal arm 1 or 2.The fulcrum of screw mandrel 4 is on principal arm 2, and it can link to each other with fixed block 3, and draws or promote fixed block 3.

With reference to Fig. 3, this utility model practices like this.Pierce draw point at the fracture two ends, again draw point is fixed on the external fixed mount, thus fixing fracture segment, and this is the application principle of all bone external fixators.By the thread a needle rule of external fixation of fracture, after two sections of fracture are respectively worn two of draw points, the draw point of the top and the screw 8,9 of fixed block 3 are tightened, other is loosening state temporarily, at this moment, rotary screw rod 4 tractives are fixed block bottom, promptly the hypomere fracture is drawn by draw point, make the overlapping of fracture, become the angle to draw back.At this moment,, again the position on middle two fixed blocks and draw point angle, length are adjusted, can be resetted fully, remaining fixed block and draw point are tightened up a screw tighten one by one if also have residual displacement, promptly finish one reset, fixation procedure.

Fig. 4 is integrated mode figure of the present utility model, and its one-tenth capable of being combined is bilateral, semi-ring, loopful formula, thereby to the fracture of complexity and bone malformation is orthopedic also can handle.

In sum, the utility model has the advantages that it has a traction screw mandrel (detachably) to draw fracture, thereby can reset fracture.Its fixed block 3 L-shaped designs, it can make the position of draw point do translation, reach and swing up and down, so to the miscellaneous fracture displacement as shorten, become the rectification of angle, side, rotation displacement to become possibility, the technology of threading a needle is not needed to be strict with yet.This is the present not available advantage of each external fixator.More unique is, behind the loosening

screw

6,7 of the middle and late stage of fracture, can make principal arm 1 do relative slip with 2, thereby fracture segment is moved along the limbs longitudinal axis, produce stress, so the stress-shielding effect that can avoid general strong internal fixation and external fixation to bring more can promote growth of spur, accelerating union of bone fracture.

Claims

1. treat that having of fracture resets and the bone external fixator of pressurization function automatically for one kind, this bone external fixator by principal arm 1 and 2 and fixed block 3, screw mandrel 4, draw point 5 and screw 6,7,8,9 form, it is characterized in that:

A. draw point 5 is stuck on the fixed block 3, and can be fixed on principal arm 1 and 2;

But screw mandrel 4 traction and fixation pieces 3 b.;

C. screw 6,7 is connected and fixed principal arm 1 and 2.

2. by the described bone external fixator of claim 1, it is characterized in that fixed block 3 is " L " shape, its upper arm has dead slot, and porose screw 8 can be fixed on draw point 5 on the upper arm, and its underarm is drilled with the hole, and screw 9 can be fixed on principal arm 1 or 2.

3. by the described bone external fixator of claim 1, the fulcrum that it is characterized in that screw mandrel 4 is on principal arm, and it can spur fixed block 3 and move on principal arm, and detachably gets off.

4. by the described bone external fixator of claim 1, it is characterized in that its body supports part is made up of principal arm 1 and 2, this two part all is middle list structures that have dead slot, fixing principal arm 1 and 2 when screw 6,7 is tightened, can make principal arm 1 do relative slip after unscrewing, but can not move up and down and twist with 2.