CN103445834B - Fast drawing extension rod - Google Patents

Abstract

The invention provides a fast drawing extension rod, which is connected between two hole rings in an external fixator, and comprises a threaded rod, an inner sleeve rod and an outer sleeve rod, wherein the threaded rod is inserted into the inner sleeve rod from top to bottom, the inner sleeve rod is inserted into the outer sleeve rod from top to bottom, the lower end of the outer sleeve rod is provided with threaded connecting pieces for hole ring connection, the upper end of the inner sleeve rod is provided with an outer flange, a pressure controller is arranged between the upper end part of the inner sleeve rod and the threaded rod, the inner side wall of the upper end part of the outer sleeve rod is provided with a cone-shaped opening, the outer side wall of the upper end part of the outer sleeve rod is provided with an outer thread section, and a locking joint is arranged between the upper end part of the outer sleeve rod and the inner sleeve rod. The fast drawing extension rod can meet the requirements of performing rigid fixation in the early stage of fracture, providing elastic fixation with axial and comprehensive stress stimulation in the middle stage of fracture and providing balanced fixation in the later stage, and compared with the prior art, the fast drawing extension rod is easier to use.

Description

Quick lengthening bar

Technical field

The present invention relates to a kind of connecting rod be applied on exter-nal fixer.

Background technology

In the modern process of medical skill, material and the configuration aspects of exter-nal fixer obtain significant progress, the hole ring type external fixator that outstanding Russia medical expert Ilizarov beyond doubt invents, hole ring type external fixator and fine steel needle tension technology, make the exter-nal fixer in primitive meaning, there occurs quality change, performance of control raising in mechanical function mode and Mechanobiology performance, indication is more extensive, is the major progress of exter-nal fixer technical field.The technology of Ilizarov also excites the study of countless orthopedist to bone External technique, the interest of investigation and application, thereafter U.S. Dror Paley has write " orthopedics's principle ", CORA concept is applied among rescuing of bone extenal fixation by creativeness, and bone extenal fixation straightening technique is made substantial progress in standardization and digitized.Meanwhile, the research of orthopedic instruments also has rapid progress: 1984, and Bastiani etc. have invented a kind of monolateral axle dynamic external fixator, simplifies and has grasped and make difficulty, is the more a kind of exter-nal fixer of domestic and international application; AO school also recognizes the using value of exter-nal fixer opening, in infected fracture, have developed a kind of tubulose external fixator.American J Charles Taylor in 1994 (charles. Taylor) etc. people on the basis of Ilizarov annular external fixator, Curve guide impeller becomes " Spatial infrastructure " external fixator (Taylor Spatial Frame of numeral, be called for short TSF), " Spatial infrastructure " external fixator a kind ofly six telescopic connecting rods is connected obliquely the hole ring type external fixator that can rotate freely on near-end and distal loop and at junction point place, and this hole ring type external fixator also claims " Taylor's space frame ".

Taylor's space frame has six connecting rods that can regulate length, and the length of each connecting rod can directly read, 6 connecting rods connect support two rings, (if with 5 connecting rods, system is unstable to form an entirety, if with 7 connecting rods, system is subject to excessive restriction), total is abnormal firm.As long as Taylor's space frame regulates the length of a wherein connecting rod, a ring will change position by another ring relatively, connect the 6 piece pillars of base surface to platform, its length, spatially-variable, by means of robotics and parallel mechanics, regulated the length of 6 connecting rods by the instruction of computer export numeral, change the steric configuration of Taylor's space frame, reach that fracture site resets, the orthopedic or object that extends.

During treatment fracture (comprising skeleton deformity osteotomy orthopedic rear), how to implement reasonably fixing, can only according to the biological regularity of knitting, analyze, evaluate, explore rational rigidity of fixation, and carry out technological innovation with this, and be not only the reasonability around study on fixation methods rigidity of fixation, so since the nineties in 20th century, Chinese scholar creativeness proposes based on regeneration reconstruction theory, take cybernetics as the bone External technique system of criterion.

Now, applicant, according to " orthopaedics Natural Reconstruction theory ", proposes one " the adaptability rigidity concept of fracture fixation ", i.e. adaptability rigidity of fixation.Described adaptability rigidity of fixation, refer to that exter-nal fixer is while the maintenance reduction of the fracture is stable, according to the original growth mode of bone embryo, interim best rigidity of fixation is provided, make full use of the adaptive control of bone counter stress, the growth of adjustment bone and absorption, promote the process of union of fracture, the optimized reconstruction of complete osteogenesis function, until knitting returns to the most perfect degree, in other words, the rigidity being exactly fracture fixation reduces, the dynamic conversion process that biomechanics of bone intensity increases along with the reduction of rigidity of fixation along with the increase of the intensity of knitting.Sum up thus: fracture early implementation is strong fixing, there is provided axial mid-term and the flexible fastening of combined stress stimulation, later stage provides balance fixing, this concept meets the biological process of fracture fixation, healing, reconstruction, provides to External technique rationally application clinically the theoretical direction be of practical significance.

Although the design of Taylor's space frame, make and reach precision with clinical practice, standardization and intelligentized degree, but the place also existed not as people's will: 1, Taylor's space frame is difficult to meet fracture fixation, healing, the biological process of rebuilding, namely be difficult to meet fracture early implementation strong fixing, there is provided axial mid-term and the flexible fastening of combined stress stimulation, the needs that later stage provides balance fixing, specifically, be exactly that the fixing rigidity of Taylor's space frame can not change, when running into some cases complicated especially (such as several problem for the treatment of that needs exists) simultaneously, the motility of Taylor's space frame seems not enough, and the instruction numeral that exports of computer must regulate the length of 6 connecting rods, change the steric configuration of support thus, reach fracture site to reset, orthopedic or extend object, so lack function adaptability, certain limitation is had when clinical practice.2, Taylor's space frame can only connect support two rings with 6 bars, forms an entirety, if with 5 bars, system is unstable, if with 7 bars, system is subject to excessive restriction, and obviously, whole system has been cured, not only manufacturing cost is high, and uses expensive, adds medical treatment cost.

Summary of the invention

The object of this invention is to provide a kind ofly can meet flexible fastening that fracture early implementation provides axis and combined stress to stimulate strong fixing, mid-term, the quick lengthening bar of requirement that the later stage provides balance fixing, solve the compatibility (reasonability of the Mechanobiology environment) problem of mechanical energy (mechanical environment) and bioenergy (tissue regeneration), and solve traditional exter-nal fixer manufacturing cost high, use expensive problem.

For achieving the above object, the present invention adopts following technical scheme: a kind of lengthening bar fast, be connected between two hole rings in exter-nal fixer, it is characterized in that: include threaded rod, interior bar cover and outer bar cover, described threaded rod is inserted in interior bar cover from top to bottom, described interior bar cover is inserted in outer bar cover from top to bottom, and the lower end of described outer bar cover is provided with the threaded connector be connected with hole ring.

The upper end of described interior bar cover is provided with flanging, and be provided with pressure controller between the upper end of interior bar cover and threaded rod, described pressure controller is overlapped by adjusting sleeve, Stress control and Compress Spring forms, the upper end of described adjusting sleeve is threaded with threaded rod, the bottom of adjusting sleeve is connected with Stress control external threading, the interior bar that described Stress control cover is movably set on the downside of flanging puts, and described Compress Spring is enclosed within the threaded rod between flanging that the upper end of adjusting sleeve and interior bar overlap.

It is uncovered that the medial wall, upper end that described outer bar overlaps is provided with taper, the lateral wall, upper end of outer bar cover is provided with external thread section, and be provided with lock-on connection between the upper end of outer bar cover and interior bar overlap, described lock-on connection is made up of cone shaped elastic circle and locking nut, described locking nut is threaded by external thread section the upper end of the cover of bar outside, described cone shaped elastic circle be inserted in taper uncovered in, be clipped in interior bar cover and between outer bar overlap, and the fixing of the upper end of cone shaped elastic circle is on the upper end of locking nut.

Bar can be provided with between the medial wall that the lateral wall, bottom of described interior bar cover and outer bar overlap and overlap pad.

The medial surface of described bar cover pad can be provided with union joint, and described interior bar puts and is provided with the locating hole corresponding with union joint, and bar cover pad is fixed on interior bar puts by union joint is relative with locating hole.

Described threaded connector can be the internal thread hole being arranged on outer bar cover lower end.

The lower end of described outer bar cover can be provided with multidirectional articulation joint, and described threaded connector is located in multidirectional articulation joint.

Described multidirectional articulation joint can be made up of Connection Block, hinged otic placode, middle pin, axle sleeve and bearing pin, wherein hinged otic placode is arranged on the lower end of outer bar cover, axle sleeve and bearing pin are articulated and connected on hinged otic placode by middle pin, Connection Block is articulated and connected again on bearing pin, and described threaded connector is arranged on Connection Block.

Described threaded connector can be out the internal thread hole on Connection Block.

Compared with prior art the present invention has following characteristics and beneficial effect: have employed that exter-nal fixer structure of the present invention is simple, lightweight, cost is low, controllable, flexible operation, can targetedly, personalized carrying out combine, regulate and control, and substantially increases the safety of bone External technique, advance, practicality and clinical value.

During operation, according to the needs of different case, exter-nal fixer of the present invention will be provided with and be placed on orthopedic bone, and fix with draw point, the needs of whole-course treatment after once importing exter-nal fixer, can be met.

Have employed exter-nal fixer of the present invention can make mechanical energy (mechanical environment) and bioenergy (tissue regeneration) have the good compatibility (reasonability of Mechanobiology environment), can meet flexible fastening that fracture early implementation provides axis and combined stress to stimulate strong fixing, mid-term, requirement that the later stage provides balance fixing.

Have employed exter-nal fixer of the present invention can according to the needs for the treatment of, optional 2 ~ 4 are carried out Combination application on exter-nal fixer, and the whole system overcoming existing exter-nal fixer is cured, manufacturing cost is high, it is expensive to use, medical treatment cost is high shortcoming.

Have employed exter-nal fixer of the present invention enforcement thread a needle fixing after, maneuver (staff) can be passed through and directly carry out reduction (orthopedic) adjustment, preoperative measurement is carried out rapidly by means of orthopedic dip stick (by Beijing Institute of External Skeletal Fixation Technology's development and production) and lower limb orthopedic ruler (by Beijing Institute of External Skeletal Fixation Technology's development and production), operative treatment quality can be ensured, computer-aided system need not be used again to operate, reduce workload, save time, laborsaving, economize medical care expenses, simultaneously also for the intelligentized control method realizing real meaning provides solid foundation.

Have employed each component in exter-nal fixer of the present invention compared with existing Combined bone external-fixer, while the original component feature of maintenance, carry out again larger improvement and bring new ideas, add new function, the improvement and bring new ideas of each component makes the performance of exter-nal fixer newly be promoted, function is science, advanced person and practical more, meets the needs of multiple case.Specific as follows: 1, lengthening bar has drawing-off, pressurization function fast, over the course for the treatment of, according to treatment requirement, elasticity drawing-off, pressurization, flexible fastening (regulation and control elasticity) and adaptability rigidity can be implemented by pressure controller and fix.2, lengthening bar can stretch fast, namely clockwise or rotate counterclockwise lock-on connection 360 degree, quick lengthening bar can increase or shorten, solve the difficult problem that rigidity that exter-nal fixer fixes can not change, so can require to implement gap according to treatment at therapeutic process is that the adaptability balance of to be the flexible fastening of 1 ~ 2mm and later stage gap be in gap in early stage strong fixing, mid-term 3 ~ 5mm of zero is fixing.3, lengthening bar is the important component implementing overall configuration and function combinations fast, the optimum organization of configuration can be carried out, increase practicality and the dexterity of configuration, can require that implementing drawing-off, pressurization, regulation and control elasticity and adaptability rigidity fixes according to treatment at therapeutic process, embody bionics function highlightedly, improve the compatibility of mechanical energy and bioenergy, meet the requirement of regeneration reconstruction and control theory, ensure that the curative effect of 98 ~ 100%.

The present invention has quick-expansion, slow prolongation and dynamic elasticity drawing-off three kinds of functions, there is adjustment easy to operate, geometries optimize, practical, dexterous feature, more importantly, in the overall process for the treatment of, namely early, in, the difference in later stage fixes the stage, under the prerequisite of repertoire keeping exter-nal fixer, can meet early stage strong fixing respectively, flexible fastening in mid-term, the treatment requirement of the fixing stage bone of later stage balance, promote new bone growth, sclerotin mineralising, realize the optimized reconstruction of bone function and positive rehabilitation, realize healing completely, facilitate management after operation simultaneously, be convenient for measuring.

The member designs that have employed exter-nal fixer of the present invention is rationally ingenious, the existing relative independence of each component, there is again very strong interchangeability, not only random group can become various clinical required exter-nal fixer individuation configuration of the present invention, can also according to age, position and treatment requirement, the external fixator of the different geometries such as random composition is one-sided, trigonometric expression, half-ring and combined type, achieves " device turns with border ".

The present invention has carried out new innovation to the mechanics effect of exter-nal fixer, there is dynamic elasticity drawing-off function, there is the structure complying with biological requirement, while realization " device turns with border ", make exter-nal fixer bionic boundary of marching toward become possibility, provide technology ensure for implementing cybernetics.

The present invention is connected and fixed by the joint devices such as spherical joint device, damping joint device, self-locking joint device and hole ring, such as combined with hole loopful, hole semi-ring, U-shaped ring etc., improves the performance of exter-nal fixer.

Exter-nal fixer has incorporated the structural element of more Ilizarov external fixator, not only in rationale, there is again new breakthrough the aspects such as apparatus innovation, technical specification, clinical practice and treatment concept, substantially achieve theoretical system, apparatus seriation, regularized operation, criterion of therapeutical effect, define new bone External technique system.

The treatment use scope that have employed exter-nal fixer of the present invention is wide: 1, can according to treatment requirement, by inherent function and the adjusting device of exter-nal fixer, for fractures provides the function of the reduction of the fracture and adaptability rigidity; 2, for the treatment of Cranial defect, skin injury and shortening deformity of extremity provides the function slowly extended; 3, for the treatment of B&J deformity provides progressively drawing-off orthopaedic function; 4, the comprehensive mechanical function under complex situations, provides the biomechanical environment adapted with bone and soft tissue regeneration.These specific functions above-mentioned are not available for other apparatus and Therapeutic Method.

Have employed the multiple comprehensive function that exter-nal fixer of the present invention has exter-nal fixer: static fixing, dynamically fixing, drawing-off, pressurization, rectification angulation deformity, correct side displacement, rotation deformity and stiffness reliability function.In clinical practice, these functions both can play specific effect, also can play total effect, as:

1, static fixed function: both can implement the fixing of whole-course treatment, such as femoral trochanteric, condyle of femur, tibial metaphysis is fractured, radius far-end fracture, the whole process of the treatment such as articular fracture is fixed, or the fractures whole process in conjunction with simple internal fixtion is fixing, the implementation phase of again, property is fixed, the strong fixing stage of such as fracture fixation adaptability rigidity, serious splintered fracture etc. with Cranial defect is interim fixing, fixing in early days of osteotomy orthopaedy and fixing that extension osteotomy is delayed in advance, or fixing (such as both legs intersects fixing) of special circumstances etc. can be implemented.

2, adaptability rigidity of fixation function: in the different phase of fractures, by the regulation and control of external fixator structure and mechanical property, for union of fracture, new bone mineralising provide strong fixing, axial elasticity is fixed, comprehensive flexible fastening and the different rigidity of fixation such as balance is fixing, to realize the optimized reconstruction of bone function.

3, bone and limb lengthening function: application exter-nal fixer can extend bone length, as osteotomy slowly extends operation, can realize bone transport and limbs synchronous lengthening.

4, osteotomy progressively orthopaedic function: in osteotomy orthopaedy, during the extension orthopaedy of joint, utilize the drawing-off adjusting device progressively drawing-off correction deformity of external fixator, as osteotomy drawing-off is rescued, knee joint is inside and outside turns over, and slow drawing-off is rescued.

5, joint drawing-off orthopaedic function: when not osteotomy, progressively drawing-off is orthopedic with exter-nal fixer, makes arthrogryposis deformity be rescued under noinvasive condition, as knee sprung contracture deformity progressively drawing-off rescue, the progressively drawing-off of ankle and foot deformity is rescued.

6, the horizontal drawing-off function of bone: the horizontal drawing-off function of bone, refer to and carrying out along the longitudinal axis of tibia cutting a long bone soon, it progressively retracts by application exter-nal fixer, and bone footpath is increased.This art can be used for treating ischemic disease of lower extremity, as vasculitis etc., also can be used for bone footpath is increased.

7, skin drawing-off function: exter-nal fixer can implement the drawing-off in various direction to skin, with reparing skin defect and wound surface.Can be used for the various types of skin injury of lower limb.In clinical practice, above-mentioned various function is less to be used alone, and is in most cases the use in conjunction of two or more functions.Therefore, the several functions that the present invention has carries out use in conjunction, obtains beyond thought clinical effectiveness.

Compared with traditional extension rod (application publication number is the Chinese patent application of CN102860861A), the present invention is use better, specific as follows:

The structure of what 1, traditional extension rod adopted is two-stage nitration bar, there is the problem that dilatability is little, and present invention employs the structure of three sections of bars, so tensile elongation increases a lot (collapsing length is larger) than traditional extension rod, 160mm ~ 350mm can be reached, adjusting range is wider, has very large advantage, avoid the drawback of the limited length of traditional extension rod to ankle is orthopedic.

2, when traditional extension rod is carried and shunk locking jaw on lock sleeve, easily make the screw thread in locking jaw fasten threaded rod, make threaded rod and bar cover locking, simultaneously, after traditional extension rod is locked by locking jaw, the fit clearance between threaded rod and bar overlap can cause extension rod to occur slight rolling innervation.Present invention eliminates locking jaw, stuck problem is there will be so avoid when threaded rod and locking jaw stretch, simultaneously, the present invention devises outer bar cover and interior bar cover blind-mate is free to slide, and the slip of outer bar cover and interior bar cover is controlled by lock-on connection, significantly length adjustment is realized fast, owing to being being free to slide of blind-mate between interior bar cover and outer bar cover, so without rocking after locking with this.

3, traditional extension rod inconvenient problem with use is avoided.Stiffness reliability device on traditional extension rod places separately, when it withstands locking jaw, could realize stiffness reliability, adjust complexity during use to lose time, if when not needing stiffness reliability device, must be unloaded, so when using different configuration, must add to consider, and present invention employs principle built-in for stiffness reliability device, rename as pressure controller, by the Stress control cover in rotation pressure controller, the pressure of the present invention to art bone can be adjusted, by the adjusting sleeve in integral-rotation pressure controller, can make threaded rod and interior bar overlap between realize flexible fine setting, regulated the speed so both improve, in turn ensure that the degree of accuracy of adjustment, if when not needing stiffness reliability, directly Stress control cover can be rotated the bosom to adjusting sleeve, Compress Spring is depressed into the shortest (the inelastic state in Compress Spring place), now pressure controller is inoperative, but the effect of being locked is constant.

4, traditional extension rod is when processing locking jaw, and difficulty of processing is large, and finished product rate is low, production cost is high, becomes the bottleneck affecting product promotion, and present invention eliminates locking jaw, reduce difficulty of processing and production cost, improve working (machining) efficiency, avoid the problem that processing locking jaw brings.

5, traditional extension rod all adopts metal material, x-ray fluoroscopy can be affected over the course for the treatment of, and the present invention all have employed carbon fibre materials except threaded rod, so expand x-ray fluoroscopy scope, more be conducive to the situation diagnosing fracture exactly, and significantly reduce the weight of quick lengthening bar.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention will be further described in detail.

Fig. 1 is the schematic front view of the embodiment of the present invention one.

Fig. 2 is the decomposing schematic representation of the embodiment of the present invention one.

Fig. 3 is the assembling schematic diagram of the embodiment of the present invention one.

Fig. 4 is the schematic diagram of the external thread section on the lateral wall, upper end overlapped of lock-on connection and outer bar.

Fig. 5 is the structural representation of the embodiment of the present invention one.

Fig. 6 is the enlarged diagram at I place in Fig. 5.

Fig. 7 is the enlarged diagram at II place in Fig. 5.

Fig. 8 is the schematic front view of the embodiment of the present invention two.

Fig. 9 is the decomposing schematic representation of the embodiment of the present invention two.

Figure 10 is the structural representation of the embodiment of the present invention two.

Figure 11 is the schematic diagram of the long bone fracture reposition instrument applying the embodiment of the present invention two.

Figure 12 is the schematic diagram of the femur ring type triangle synchronous lengthening device applying the embodiment of the present invention two.

Figure 13 is the schematic diagram of the coxarthropathy external fixator applying the embodiment of the present invention two.

Figure 14 is the orthotic schematic diagram of ankle joint coronalplane osteotomy applying the embodiment of the present invention one.

Figure 15 is the schematic diagram of the ankle joint coronalplane drawing-off deformity corrector applying the embodiment of the present invention one.

Figure 16 is the orthotic schematic diagram of ankle joint coronalplane compound malformation applying the embodiment of the present invention one.

Figure 17 is the orthotic schematic diagram of strephopodia applying the embodiment of the present invention one.

Figure 18 is the orthotic schematic diagram of ankle joint multidimensional applying the embodiment of the present invention one.

Reference numeral: the outer bar cover of bar cover in 1-threaded rod, 2-, 3-, 4-adjusting sleeve, 5-Compress Spring, 6-Stress control cover, 7-taper are uncovered, pin, the hinged otic placode of 17-, 18-Connection Block, 19-union joint, 20-locating hole in 8-cone shaped elastic circle, 9-external thread section, 10-locking nut, 11-bar cover pad, 12-threaded connector, 13-flanging, 14-bearing pin, 15-axle sleeve, 16-.

Detailed description of the invention

Embodiment one is see shown in Fig. 1-7, this quick lengthening bar, be connected between two hole rings in exter-nal fixer, it is characterized in that: include threaded rod 1, interior bar cover 2 and outer bar cover 3, described threaded rod 1 is inserted in interior bar cover 2 from top to bottom, described interior bar cover 2 is inserted in outer bar cover 3 from top to bottom, and the lower end of described outer bar cover 3 is provided with the threaded connector 12 be connected with hole ring.

In the present embodiment, the lower end of outer bar cover 3 is provided with multidirectional articulation joint, and described threaded connector 12 is located in multidirectional articulation joint.Multidirectional articulation joint is made up of Connection Block 18, hinged otic placode 17, middle pin 16, axle sleeve 15 and bearing pin 14, wherein hinged otic placode 17 is arranged on the lower end of outer bar cover 3, axle sleeve 15 and bearing pin 14 are articulated and connected on hinged otic placode 17 by middle pin 16, Connection Block 18 is articulated and connected again on bearing pin 14, described threaded connector 12 is arranged on Connection Block 18, and threaded connector 12 is out the internal thread hole on Connection Block 18.Certainly, in other embodiments, threaded connector 12 also can be the thing of external thread rod and so on.

The upper end of described interior bar cover 2 is provided with flanging 13, and be provided with pressure controller between the upper end of interior bar cover 2 and threaded rod 1, described pressure controller is made up of adjusting sleeve 4, Stress control cover 6 and Compress Spring 5, the upper end of described adjusting sleeve 4 is threaded with threaded rod 1, bottom and the Stress control of adjusting sleeve 4 overlap 6 and are threaded, described Stress control cover 6 is movably set on the interior bars cover 2 on the downside of flanging 13, and described Compress Spring 5 is enclosed within the threaded rod 1 between flanging 13 that the upper end of adjusting sleeve 4 and interior bar overlap 2.

The medial wall, upper end of described outer bar cover 3 is provided with taper uncovered 7, the lateral wall, upper end of outer bar cover 3 is provided with external thread section 9, and the upper end of outer bar cover 3 and interior bar are provided with lock-on connection between overlapping 2, described lock-on connection is made up of cone shaped elastic circle 8 and locking nut 10, described cone shaped elastic circle 8 is inserted in taper uncovered 7, be clipped in interior bar cover 2 and outer bar overlaps between 3, and the upper end of cone shaped elastic circle 8 fixes on the upper end of locking nut 10, described locking nut 10 is threaded by external thread section 9 upper end of the cover of bar outside 3.

Be provided with bar between the medial wall that the lateral wall, bottom of described interior bar cover 2 and outer bar overlap 3 and overlap pad 11, the medial surface of bar cover pad 11 is provided with union joint 19, described interior bar cover 2 is provided with the locating hole 20 corresponding with union joint 19, and bar cover pad 11 is fixed on interior bar cover 2 by union joint 19 is relative with locating hole 20.

The assembling process of embodiment one: 1, threaded rod and adjusting sleeve are linked by spiral shell and connect, and Compress Spring is penetrated threaded rod, penetrates interior bar cover subsequently, then Stress control cover is penetrated interior bar cover, suppresses Compress Spring gently, is connected by Stress control cover with adjusting sleeve; 2, cone shaped elastic circle is put into inside locking nut, then interior bar cover is penetrated, again two bar cover pads are buckled into interior bar to put, interior bar cover is inserted outer bar cover simultaneously, rotational lock nut, locking nut is connected with outer bar cover, now loosen locking nut, interior bar cover can be free to slide between overlapping with outer bar, and tighten locking nut, interior bar cover and outer bar cover can be locked.3, bearing pin is put into axle sleeve and is connected with Connection Block 18, and then bearing pin is connected with outer bar cover by middle pin.

Embodiment two is see Fig. 8-10, be with the difference of embodiment one, the lower end of outer bar cover 3 does not have multidirectional articulation joint, and described threaded connector 12 is the internal thread holes (the present embodiment is that a nut has been welded in the lower end of directly bar cover 3 outside) being set directly at outer bar cover lower end.Certainly, in other embodiments, threaded connector 12 also can be the thing of external thread rod and so on.

The present invention and various joints device to link aspect identical with traditional, coordinate kind more.Its application be embodied in multidimensional orthopedic on.See Figure 14-18, described embodiment one, except being applied in Taylor's space frame, also can be applicable in other bone anchors such as ankle joint coronalplane osteotomy orthosis, ankle joint coronalplane drawing-off deformity corrector, ankle joint coronalplane compound malformation orthosis, strephopodia orthosis, ankle joint multidimensional orthosis.See Figure 11-13, described embodiment two, except being applied in Taylor's space frame, also can be applicable in other bone anchors such as fracture reposition instrument, femur ring type triangle synchronous lengthening device, the dynamic external fixator of hip joint.

The present invention all have employed carbon fibre materials except threaded rod.

The effect of the lock-on connection in the present invention is: make interior bar cover and outer bar overlap rapid drawing-off and locking, and interior bar cover and outer bar cover are locked at an arbitrary position.Specifically, the medial wall, upper end of described exactly outer bar cover is provided with taper uncovered (namely the medial wall, upper end of outer bar cover is the pyramidal structure that the diameter of axle diminishes gradually) from top to bottom, when tightening the locking nut in lock-on connection, taper is uncovered can be compressed cone shaped elastic circle, make bar cover in the locking of cone shaped elastic circle, bar cover and outer bar cover locking now, when unscrewing locking nut, the reinstatement of cone shaped elastic circle, makes interior bar overlap mutually externally bar cover free-extension.

Treatment stage in early days, when operative reduction, exter-nal fixer of the present invention will be provided with when being fixed on art bone, locking nut in the present invention is unclamped, the present invention is made to be in length fast tunable state (interior bar cover with outer bar cover can relative sliding), lengthening bar is in free movement state under the effect of various joints device fast simultaneously, and exter-nal fixer now can carry out three-dimensional adjustment neatly, carries out drawing-off, rotation, pressurization, reset.After art bone resets substantially, by the joint device locking in exter-nal fixer, carried out the micro stretching contracting (adjusting sleeve can control the relative position of interior bar cover and threaded rod) of threaded rod by the adjusting sleeve in rotation pressure controller, the reduction of the fracture is finely tuned.After the adjustment of art bone resets, Stress control cover in pressure controller can be rotated the bosom to adjusting sleeve, now Compress Spring is compressed into the shortest, pressure controller inoperative (Compress Spring is inoperative), now the present invention will fully fix art bone fast, and for union of fracture, new bone mineralising provide strong fixing, that guarantees required by knitting initial stage is strong fixing, avoid the dislocation because stable difference causes, angulation is forbidden, the problems such as poor healing.

When the mid-term of knitting, need the flexible fastening providing axis and combined stress to stimulate to art bone, Stress control is overlapped rotation unclamp, Compress Spring is made to be in elastic force state, under the effect of the Compress Spring now in pressure controller, the present invention can have certain telescopic resilience (threaded rod and interior bar overlap elasticity and be connected), cover is controlled by rotational pressure, the elastic force of Compress Spring can be regulated, realize adjustment thus and control elastic force of the present invention, thus reach control exter-nal fixer to the object of the pressure size of art bone, now, exter-nal fixer can be controlled, implement drawing-off, pressurization function, adjusting sleeve in the present invention is to drawing-off pressurization scope 0 ~ 200 handkerchief (unit) of knochenbruch.Rotate clockwise adjusting sleeve 360 degree, increase 1mm, rotate counterclockwise, shorten 1mm, this regulation and control, the flexible fastening rigidity that the best combined stress providing knitting mid-term stage stimulates, gives full play to the adaptability of bone counter stress, the growth of adjustable bone and absorption, promote the process of union of fracture, the optimized reconstruction of complete osteogenesis function.

The anaphase stage: being provided with exter-nal fixer of the present invention will provide balance fixing, under the prerequisite of function keeping exter-nal fixer, the quantity of the present invention on exter-nal fixer can be reduced at random fast, so both maintain the support strength of exter-nal fixer, alleviate again the weight of exter-nal fixer, and facilitate management after operation, be beneficial to positive rehabilitation.

Claims (7)

1. a quick lengthening bar, be connected between two hole rings in exter-nal fixer, it is characterized in that: include threaded rod (1), interior bar cover (2) and outer bar cover (3), described threaded rod (1) is inserted in interior bar cover (2) from top to bottom, described interior bar cover (2) is inserted in outer bar cover (3) from top to bottom, and the lower end of described outer bar cover (3) is provided with the threaded connector (12) be connected with hole ring;

The upper end of described interior bar cover (2) is provided with flanging (13), and be provided with pressure controller between the upper end of interior bar cover (2) and threaded rod (1), described pressure controller is by adjusting sleeve (4), Stress control cover (6) and Compress Spring (5) composition, the upper end of described adjusting sleeve (4) is threaded with threaded rod (1), the bottom of adjusting sleeve (4) is threaded with Stress control cover (6), described Stress control cover (6) is movably set on the interior bar cover (2) of flanging (13) downside, described Compress Spring (5) is enclosed within the threaded rod (1) between the upper end of adjusting sleeve (4) and the flanging (13) of interior bar cover (2),

The medial wall, upper end of described outer bar cover (3) is provided with taper uncovered (7), the lateral wall, upper end of outer bar cover (3) is provided with external thread section (9), and be provided with lock-on connection between the upper end of outer bar cover (3) and interior bar cover (2), described lock-on connection is made up of cone shaped elastic circle (8) and locking nut (10), described locking nut (10) is threaded by external thread section (9) upper end of bar cover (3) outside, described cone shaped elastic circle (8) to be inserted in taper uncovered (7) and to be clipped between interior bar cover (2) and outer bar cover (3), and the upper end of cone shaped elastic circle (8) fixes on the upper end of locking nut (10).

2. quick lengthening bar according to claim 1, is characterized in that: be provided with bar between the lateral wall, bottom of described interior bar cover (2) and the medial wall of outer bar cover (3) and overlap pad (11).

3. quick lengthening bar according to claim 2, it is characterized in that: the medial surface of described bar cover pad (11) is provided with union joint (19), described interior bar cover (2) is provided with the locating hole (20) corresponding with union joint (19), and bar cover pad (11) is fixed on interior bar cover (2) by union joint (19) is relative with locating hole (20).

4. quick lengthening bar according to claim 1, is characterized in that: described threaded connector (12) is the internal thread hole being arranged on outer bar cover lower end.

5. quick lengthening bar according to claim 1, is characterized in that: the lower end of described outer bar cover (3) is provided with multidirectional articulation joint, and described threaded connector (12) is located in multidirectional articulation joint.

6. quick lengthening bar according to claim 5, it is characterized in that: described multidirectional articulation joint is made up of Connection Block (18), hinged otic placode (17), middle pin (16), axle sleeve (15) and bearing pin (14), wherein hinged otic placode (17) is arranged on the lower end of outer bar cover (3), axle sleeve (15) and bearing pin (14) are articulated and connected on hinged otic placode (17) by middle pin (16), Connection Block (18) is articulated and connected again on bearing pin (14), and described threaded connector (12) is arranged on Connection Block (18).

7. quick lengthening bar according to claim 6, is characterized in that: described threaded connector (12) is out the internal thread hole on Connection Block (18).