CN2324977Y

CN2324977Y - External fixation implement for distraction of ilium with femur

Info

Publication number: CN2324977Y
Application number: CN 98235203
Authority: CN
Inventors: 张树桧
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-22
Filing date: 1998-01-22
Publication date: 1999-06-23
Anticipated expiration: 2008-01-22

Abstract

The utility model discloses an external fixation implement for the distraction of ilium with femur, which is mainly composed of the through bolts of the neck of femur and an exosomatic connector. The upper part of the exosomatic connector is a siamesed joint with a support rod, a cotyle and a joint head; the lower part of the external connector is provided with the femur fixed rod of a straight shape; the middle of the external connector is provided with a telescopic adjuster; ilium through bolts and femur through bolts are respectively passed through the upper end and the lower end of the adjuster; the utility model is an exosomatic implement, which can avoid operative incision; the external fixation implement for distraction of ilium with femur can disperse various stresses existing in the position of fracture, which can mitigate various harmful stresses born by the two through bolts of the neck of femur, and avoid various complicating diseases such as open reduction, fixation and narcosis. The utility model is safe, and can shorten the course of treatment.

Description

Ilium-thigh struts external fixator

This utility model relates to a kind of medical apparatus and instruments, relates in particular to a kind of be used for neck of femur and intertrochanteric fracture external and resets and fixed ilium-thigh struts external fixator.

At present, the external fixer of domestic used treatment fracture of femoral neck mainly contains lifting formula exterior fixation bracket, its structure is that neck of femur is worn 2 drift bolts, wear 1-2 root staple on the femoral shaft, drift bolt on the neck of femur runs through the fracture two ends with fixed fracture of femoral neck, the femoral shaft staple is as the strong point, the connecting rod that neck of femur, dried nail connect as one has been strengthened neck of femur drift bolt warping resistance power, have adding on the connecting rod that extension adjustment device is to regulate at any time, the advantage of this structure is that it meets the fixed mechanics principle of fracture of femoral neck, receives good efficacy.But because the neck of femur drift bolt is bearing great shear forces, bending power, revolving force, what make nail produces stress concentration on every side, and stress concentration will cause local osteoclasia bone resorption, makes nail loosening, bearing capacity weakens or bending fractures, and also directly affects the healing of fracture simultaneously.

The purpose of this utility model provides a kind of strutting with the ilium thigh and assists resetting of fracture of femoral neck, and disperse the stress at fracture of femoral neck place to make this treatment of fractures wound little, practicality easy and simple to handle, people from province, laborsaving, the various complication of avoiding open reduction, internal fixation and anesthesia to cause, shorten the course of treatment, economical, safely, ilium-thigh of being beneficial to popularization struts external fixator.

The technical solution of the utility model realizes in the following manner:

A kind of ilium-thigh struts external fixator, it mainly is made up of neck of femur drift bolt and external adapter, its external adapter divides two parts up and down, top is to have cramp bar, cotyla and ball and socket joint disjunctor joint, the lower part is a shape femur fixed bar always, two parts are one by a flexible transfer device suit up and down, and cramp bar has the screw that can wear the ilium drift bolt, on the straight shape femur fixed bar of bottom the screw that can wear the femur drift bolt is arranged also.

Cramp bar is a "T"-shaped cross bar, and being installed with most advanced and sophisticated in the screw on the straight shape femur fixed bar of "T"-shaped cross bar and bottom respectively is that coarse-pitch thread, rear end are ilium drift bolt, the femur drift bolt of flat thread.

The disjunctor joint turns forward, can anteflexion 60-65 °, after stretch 10-15 °, each 30 ° of interior receipts, abductions are synchronized with the movement with the body intrinsic articulation.

Expansion and cotraction regulator is set with scalable 4-5 centimetre of disjunctor joint, straight shape femur fixed bar by the female thread at two ends, struts effect during elongation.

The neck of femur drift bolt is most advanced and sophisticated to be that coarse-pitch thread, rear end have sleeve pipe and nut.

Ilium drift bolt, femur drift bolt respectively are two, and most advanced and sophisticated coarse-pitch thread is that 3-4cm, stage casing are the smooth flat bar of 2-3cm, and back segment is the flat thread that has nut, have one to increase thick nail neck and prevent to enter too dark damaged tissue between most advanced and sophisticated screw thread of ilium drift bolt and the smooth shaft.

Neck of femur drift bolt tip is that 2.0cm coarse-pitch thread, stage casing are that smooth shaft, the back segment of 4cm is flat thread band nut, and outer shroud one thickness of the back segment of nail is the sleeve pipe of 1.5mm.

Good effect of the present utility model is:

1, this device is a device outside, and practicality easy and simple to handle can be avoided operative incision, is more suitable for the old and the weak patient.Its fixation principle reaches the requirement of modern biomechanics fully, the various stress that fracture is existed by 4 on ilium and the femoral shaft fixedly drift bolt be directed to strutted on the connecting rod fixing, and can regulate at any time, two various harmful stress (shearing forces that drift bolt bears on the neck of femur have been alleviated, bending power) only keep along the physiological stress of neck of femur longitudinal axis conduction, the diameter of drift bolt is diminished, minimizing is to the destruction of fracture local bone structure and blood confession, simultaneously because 4 carrying drift bolts are local away from fracture, avoided the osteoclasia due to the bone local stress concentration, bone resorption more helps the healing of fracturing.Avoided open reduction, internal fixation, the various complication of anesthesia, shortened the course of treatment, economical, safely, be beneficial to popularization.

2, have joint motions and fixing dual function, this device is equipped with external joint and expansion and cotraction regulator on connecting rod, make hip joint that certain range of activity be arranged in fracture fixation, when motion, still do not lose fixation, meet the settled principle that fracture is association of activity and inertia, patient can ground be movable in bed and down in early days, the various severe complications of avoiding long-term bed to cause.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the structural representation in this utility model use;

Fig. 2 is the structural representation of external adapter among Fig. 1;

By Fig. 1-Fig. 2 as can be seen, it mainly is made up of 2 neck of femur drift bolts 12 and external adapter, its external adapter divides two parts up and down, top is the disjunctor joint 5 that has cramp bar 2, cotyla 4, ball and socket joint, the bottom is a shape femur fixed bar 7 always, and two parts are one by flexible transfer device 6 suits up and down, and expansion and cotraction regulator 6 is set with disjunctor joint 5, straight shape femur fixed bar 7 by the female thread at two ends, thereby scalable 4-5 centimetre, strut effect during elongation.Disjunctor joint 5 turns forward, can anteflexion 60-65 °, after stretch 10-15 °, each 30 ° of interior receipts, abductions are synchronized with the movement with the body intrinsic articulation; Support bar 2 is "T"-shaped support bars, and two screws are horizontally arranged on it, is installed with two ilium drift bolts 1 in the hole; The femur fixed bar has and is installed with the supporting-point of two personal share bone nails as the adapter lower end in two screws that are arranged above and below.It is that smooth shaft, the rear end of 4cm is that flat thread has nut that there are 2.0cm coarse-pitch thread, stage casing in neck of femur drift bolt 12 tips, and the back segment periphery of nail has the sleeve pipe 11 that a thickness is 1.5mm; Ilium drift bolt 1, femur drift bolt 8 tips 10 are that 3-4cm, stage casing are the 2-3cm smooth shaft for coarse-pitch thread, and the rear portion is a flat thread band nut 3, ilium drift bolt 1 between most advanced and sophisticated screw thread and smooth shaft, have one increase thick nail neck prevent to enter too dark, damaged tissue; One sleeve pipe 9 is also arranged femur drift bolt 8 back segments in case to advance nail too dark, damaged tissue.

When using operation, the patient is placed on the traction fixator, hard outer anesthesia rear haulage resets, affirmation has resetted under film making or the monitoring of C arm perspective, sterilizes, spreads list then, ilium entry point location, actuator on the adapter is transferred to the maximum compression position, ilium drift bolt in the nail hole on the cramp bar of upper end along femoral screw on two holes, lower end, struts adjusting then; During two drift bolts of last neck of femur, earlier with scale guide pin location, three of general upper, middle and lower, retention position is best, and following closely with this is reference, parallelly with it is screwed into two drift bolts, sets up sleeve pipe at the nail afterbody, and last medicated cap makes it to pressurize gradually, till two broken ends of fractured bone are close to;

Claims

1, a kind of ilium-thigh struts external fixator, it mainly is made up of neck of femur drift bolt (12) and external adapter, it is characterized in that external adapter divides two parts up and down, top is the disjunctor joint (5) that has cramp bar (2), cotyla (4) and ball and socket joint, the lower part is a shape femur fixed bar (7) always, two parts are one by a flexible transfer device suit up and down, the screw (3) that can wear ilium drift bolt (1) is arranged on the cramp bar (2), on the straight shape joint of bottom the screw that can wear femur drift bolt (8) is arranged.

2, ilium according to claim 1-thigh struts external fixator, it is characterized in that cramp bar (2) is a "T"-shaped cross bar, being installed with most advanced and sophisticated in the screw on the straight shape femur fixed bar (7) of "T"-shaped cross bar (2) and bottom respectively is that coarse-pitch thread, back segment are ilium drift bolt (1), the femur drift bolt (8) of flat thread.

3, ilium according to claim 2-thigh struts external fixator, it is characterized in that disjunctor joint (5) turns forward, can anteflexion 60-65 °, after stretch 10-15 °, each 30 ° of interior receipts, abductions.

4, ilium according to claim 1-thigh struts external fixator, it is characterized in that expansion and cotraction regulator (4) is set with disjunctor joint (5), straight shape femur fixed bar (7), scalable 4-5 centimetre of expansion and cotraction regulator (6) by the female thread at two ends.

5, ilium according to claim 1-thigh struts external fixator, it is characterized in that neck of femur drift bolt (12) tip is that 2.0cm coarse-pitch thread, stage casing are that smooth shaft, the back segment of 4cm is flat thread band nut, outer shroud one thickness of the back segment of nail is the sleeve pipe (11) of 1.5mm.

6, strut external fixator according to the described ilium of claim 1-4-thigh, it is characterized in that ilium drift bolt (1), femur drift bolt (8) respectively are two, most advanced and sophisticated coarse-pitch thread is that 3-4cm, stage casing are the 2-3cm smooth shaft, back segment is the flat thread that has nut, has one to increase thick nail neck between most advanced and sophisticated screw thread of ilium drift bolt (1) and the smooth shaft.