CN2461500Y

CN2461500Y - External fixer for orthopaedics

Info

Publication number: CN2461500Y
Application number: CN 00232568
Authority: CN
Inventors: 李绍刚; 蒋冠珞
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-13
Filing date: 2000-12-13
Publication date: 2001-11-28
Anticipated expiration: 2010-12-13

Abstract

The utility model provides an external fixer for orthopaedics. The utility model is mainly composed of a frame body, wherein, both ends of the frame body are connected with two needle clamping blocks through two universal joints. A locking device of the locking device is arranged in the frame body. A length adjustment device is arranged between one needle clamping block and a main body. Three to thirteen needle channels are arranged in the needle clamping blocks. A fixing needle can be arranged in any needle channel. Screw holes are arranged in the middle of the needle channels 2, 4, 6, 8, 10, 12. Locking screws can be arranged on the screw holes for locking the two semi-edge needle clamping blocks. The fixer can adjust the needle distances of a group of needles. Gradual reduction of fixed stiffness can be realized. The utility model has the advantages of enhancement of stability, reliability and adaptability, and good cure effect.

Description

The orthopaedics external fixator

This utility model relates to a kind of orthopaedics external fixator, belongs to the medical surgical apparatus.

The external fixation of the usefulness that resets after the fracture has experienced plaster splint external fixation method, open reduction adds inner fixed law, has developed into the fixation that external and internal fixation combines now, because of it has advantage extensive uses such as easy, that damage is little, stable.Now be its formation of example explanation with the unilateral external fixator: the external fixator stage casing is a main body, its two ends are connected with two folder pin pieces at two ends by two universal joints, each universal joint all has a retaining mechanism to be contained in the intermediary support body, and length regulator is also on support body.During use, will fracture earlier resets as far as possible, and the locking pin that will press from both sides again on the pin piece creeps into the fracture site both sides, clamps with folder pin piece.By adjusting length adjuster fracture is resetted then, the locking universal joint has promptly fixed.This external fixator is easy to use, and the patient can be free movable, helps rehabilitation.But in use find to have following shortcoming: being restricted between two groups of locking pins apart from adjusting range, ideal situation is that first pair of nearest in two groups of pins pin should be positioned as close to fracture, and a correspondence farthest is as far as possible away from fracture.After fixing like this, its mechanical structure stability, reliability are best.Existing holder can't reach this requirement because of main body is oversize.Patent application 00229161 has solved this problem, but the needle gage of one group of pin fixes, and can not adjust, and can't adapt to various cases, and the no stroke in fixing back is unfavorable for patient's rehabilitation.

The purpose of this utility model is that a kind of needle gage adjusting range of design is big, stroke is arranged after fixing, more helps the fracture rehabilitation, and all adjustable external fixator between one group of pin needle gage and two groups of pin needle gages improves stability, reliability and the adaptability of holder.The structure of length adjustment device makes the length of holder can produce 1 millimeter fine motion, makes the healing that fracture can be faster, more firm.

The technical solution of the utility model is achieved in that

This orthopaedics external fixator mainly comprises support body 1, and its two ends press from both sides pin pieces 4 and are connected with 5 with two with 3 by two universal joints 2, universal joint retaining mechanism 7 is arranged in the support body, between one side folder pin piece and universal joint length adjustment device is arranged, establish N needle track, N＞2 in its folder pin piece.

Above-mentioned orthopaedics external fixator, its length adjustment device comprises length adjuster 6 and retractor device 8, length adjuster 6 comprises length adjustment screw rod 6-1, length adjustment sleeve 6-2, stop collar 6-3, stop nut 6-4, fixed bar 6-5, the telescopic screw-internal thread fit of the external screw thread of length adjustment screw rod and length adjustment, stop collar 6-3 is enclosed within the last screw rod head near the length adjustment screw rod of length adjustment screw rod 6-1, stop nut 6-4 pins stop collar, head that is vertically fixed on length adjustment sleeve 6-2 of fixed bar 6-5, one is vertically fixed on the stop collar, two fixed bars in the same way, tail end has screw thread, insert respectively in the hole of universal joint and folder pin piece, retractor device 8 comprises the telescopic head 8-1 of folder pin piece side, the telescopic hole 8-2 of universal joint side and hold-down screw 8-3, elongate slots 8-4 is arranged on the telescopic head, telescopic head inserts telescopic hole, and hold-down screw is aimed at elongate slots and screwed.

Above-mentioned orthopaedics external fixator, its folder pin piece is made up of two halves, in establish 7 to 13 needle tracks, locking pin 12 can place any needle track, is provided with screw 10 in the middle of 2,4,6,8,10,12 needle tracks, can go up lock-screw two halves is pressed from both sides the locking of pin piece.

The utility model has the advantages that: establish 7 to 13 needle tracks in its folder pin piece, not only prolonged the needle gage in the pin group, and the scalable needle gage, select needle track to thread a needle according to the situation of fracture, greatly improved stability, reliability and the adaptability of holder.The length adjuster 6 and the retractor device 8 of its length adjustment device are used, can realize progressively reducing fixed stiffness, fracture is carried out with the third mode of healing, primary healing is promptly arranged, secondary healing is arranged again, the not only healing that can quicken to fracture, and the generation that helps avoid bone does not connect and refracture etc. and issue licence.

Below accompanying drawing is described: Fig. 1 is a structural representation of the present utility model, and Fig. 2 is the sketch map of length adjuster.Fig. 3 is the structural representation of retractor device, and 1 is that support body, 2 and 3 is that universal joint, 4 and 5 is folder pin pieces, the 6th among the figure, and length adjuster, wherein 6-1 is that length adjustment screw rod, 6-2 are that length adjustment sleeve, 6-3 are that stop collar, 6-4 are that stop nut, 6-5 are fixed bars.The 7th, universal joint retaining mechanism, the 8th, retractor device, wherein 8-1 is that telescopic head, 8-2 are that telescopic hole, 8-3 are that hold-down screw, 8-4 are elongate slots, the 11st, the needle track, the 12nd on the folder pin piece, locking pin.

The following describes embodiment of the present utility model: embodiment basic structure of the present utility model is provided by accompanying drawing, and support body can adopt each form in the prior art.Length adjuster is installed between a folder pin piece and the main body by two fixed bars, the external screw thread of length adjustment screw rod tail end and the telescopic screw-internal thread fit of length adjustment, stop collar 6-3 is enclosed within the last screw rod head near the length adjustment screw rod of length adjustment screw rod 6-1, the stop nut 6-4 pinning stop collar that matches with the screw thread start-stop position of length adjustment screw rod corresponding position, head that is vertically fixed on length adjustment sleeve 6-2 of fixed bar 6-5, one is vertically fixed on the stop collar, two fixed bars in the same way, tail end has screw thread, insert respectively in the hole of universal joint and folder pin piece, fix by nut.Retractor device 8 comprises telescopic head 8-1, the telescopic hole 8-2 and the hold-down screw 8-3 of universal joint side of folder pin piece side, and elongate slots 8-4 is arranged on the telescopic head, and it makes telescopic head insert telescopic hole, and hold-down screw is aimed at elongate slots and screwed.Unclamp hold-down screw, length adjustment device only is connected and fixed with length adjustment spiral shell device, make fracture site produce 1 millimeter axial fine motion; Folder pin piece is made up of two halves, in establish 3 to 13 needle tracks, locking pin 12 can place any needle track, is provided with screw 10 in the middle of 2,4,6,8,10,12 needle tracks of two halves folder pin piece, can go up lock-screw two halves is pressed from both sides the locking of pin piece.The spacing of optional one group of pin during use.Other technical application requires same as the prior art.

Using method and step:

1, at first with the reduction of the fracture (open or closed reduction all can), on skeleton, hole with sight according to the length of fracture and be screwed into two pieces of parallel locking pins at a lateral root of fracture end, the distance between locking pin is tried one's best and is grown;

2, length adjustment device is adjusted in the middle of, the inserting needle position of measuring the fracture opposite side with sight, folder pin piece the 1st with the 13rd needle track in put two pieces of parallel locking pins on the suitable needle track;

3, unclamp length adjustment device, at the bolt of the two ends of fracture difference screw down clips pin piece;

4, tighten length and transfer device and universal joint retaining mechanism, strong fix one month after, unclamp the hold-down screw of retractor device, length adjustment device only is connected and fixed with the length adjustment screw rod, can produce 1 millimeter axial fine motion at fracture site; Remove length adjuster after two months, make all axial stresses pass through fracture site fully.

Claims

1, a kind of orthopaedics external fixator, mainly comprise support body (1), its two ends are connected with (5) with two folder pin pieces (4) with (3) by two universal joints (2), universal joint retaining mechanism (7) is arranged in the support body, between one side folder pin piece and universal joint length adjustment device is arranged, it is characterized in that pressing from both sides and establish N needle track (11), N＞2 in the pin piece.

2, orthopaedics external fixator according to claim 1, its characteristic length adjusting device comprises the sharp retractor device of length adjuster (6) (8), length adjuster (6) comprises length adjustment screw rod (6-1), length adjustment sleeve (6-2), stop collar (6-3), stop nut (6-4), fixed bar (6-5), the telescopic screw-internal thread fit of the external screw thread of length adjustment screw rod and length adjustment, stop collar (6-3) is enclosed within the last screw rod head near the length adjustment screw rod of length adjustment screw rod (6-1), stop nut (6-4) pins stop collar, head that is vertically fixed on length adjustment sleeve (6-2) of fixed bar (6-5), one is vertically fixed on the stop collar, two fixed bars in the same way, tail end has screw thread, insert respectively in the hole of universal joint and folder pin piece, retractor device (8) comprises the telescopic head (8-1) of folder pin piece side, telescopic hole of universal joint side (8-2) and hold-down screw (8-3), elongate slots (8-4) is arranged on the telescopic head, telescopic head inserts telescopic hole, and hold-down screw is aimed at elongate slots and screwed.

3, orthopaedics external fixator according to claim 1, it is characterized in that pressing from both sides the pin piece is made up of two halves, in establish 3 to 13 needle tracks, locking pin (12) can place any needle track, in the middle of 2,4,6,8,10,12 needle tracks, be provided with screw (10), can go up lock-screw two halves is pressed from both sides the locking of pin piece.