Spinal pedicle internal fixation bar bending device and its working methodTechnical field
The present invention relates to a kind of spinal pedicle internal fixation bar bending device and its working methods, belong to medical instrument neckDomain.
Background technique
Clinically mostly use pedicle screw-rod solid the treatment of the diseases such as scoliosis orthopedic, spine fracture, dislocation at presentDetermine system (USS internal fixation system)-internal fixation of spine pedicle screw and is fixed on the metal bar of connection to be resetted, be fixed.Because backbone is different in each centrum stage physiological camber, the metal bar bending angle of pedicle nail is connected in interior fixed USS systemWith regard to difference.The curved rod instrument of the prior art can not strict control curved rod angle or angle it is inadequate, orthopedic purpose is not achieved,Curved rod angle is excessive, needs back bending.Operating time is extended in this way, and metal bar also is connected to pedicle of vertebral arch in USS internal fixation systemIt is a kind of damage.
Summary of the invention
According to the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to：There is provided one kind can be accurateStringent control curved rod angle, and curved rod adjustable angle, it is adaptable, it greatly improves solid in the spinal pedicle of procedure efficiencyDetermine stick bending device and its working method.
Spinal pedicle internal fixation bar bending device of the present invention, including mounting plate, mounting plate is rounded, mounting plateSafety barrel and dynamic cylinder is arranged in upper side；
Safety barrel is fixed on a mounting board, moves cylinder right end lower part together with the lower hinge of safety barrel left end, hinge joint is being pacifiedLoading board center location, safety barrel is fixed on a mounting board, and safety barrel inner hollow is fixation hole, and fixation hole cross section is in rectangle, fixedGroove is determined in upper side setting in hole, and jam-packed block is cooperated in fixation hole, and jam-packed block cross section is in rectangle, and jam-packed block height is less than fixation holeHighly, dynamic groove is set on jam-packed block upper surface, and the width fits of jam-packed block width and fixation hole, jam-packed block left end is located at hingedRight above point, threaded hole is determined in the setting of safety barrel lower part, determines cooperation in threaded hole and determines bolt, determines bolt upper end and be against jam-packed block bottom surfaceOn, determine the fixed calmly stubborn handle in bolt lower part；
Dynamic cylinder inner hollow is adjustment hole, and several upper rollers, several upper roller specification phases are installed in adjustment hole topTogether, and all upper rollers in the same plane, upper roller circumferentially takes turns groove in setting, and U-shaped frame, U-shaped are arranged below upper rollerTwo bottom rollers are installed, circumferentially setting lower whorl groove, dynamic cylinder lower part are arranged dynamic threaded hole, move in threaded hole and cooperate bottom roller in frameDynamic bolt, dynamic bolt upper end are fixed in bearing inner race, and bearing outer ring is fixed on U-shaped frame bottom surface, and it is fixed dynamic to move bolt lower endTwist handle；
Circular scale is set on mounting plate, circular scale using safety barrel lower surface as zero graduation line, determine groove, dynamic groove, onIt takes turns groove and lower whorl groove in the same plane, determine that groove is parallel with safety barrel bottom surface, putting down where the shaft of all upper rollersFace is parallel with dynamic cylinder bottom surface, meanwhile, when fixation hole and adjustment hole on the same line when, on upper roller lower edge and fixation holeEdge is concordant.
Dynamic cylinder left end blocks, and measured hole, conjunction measuring bar in measured hole, measurement pole length and dynamic tube length are arranged at closureDegree is consistent, and length scale, the fixed limit film in measuring rod outer end are arranged on measuring rod, and limit film prevents measuring rod on the right side of measured holeAbjection.
Mounting rod right lower quadrant determines handle, moves the fixed dynamic handle in cylinder left end, and operator is hand-held to be moved handle and determine handleIt is operated, saves manpower.
Determining groove, dynamic groove, upper wheel groove and lower whorl groove cross section is V-arrangement, two medial surfaces of V-arrangement not only with fixationThe periphery of stick is tangent, prevents hold-down bars from deviating from, and can adapt to the hold-down bars of different-diameter.
Operation principle and process：
Dynamic cylinder is rotated, so that fasten mounting hole and adjustment hole on same central axes, then protrudes into hold-down bars from safety barrel right end, GuStick is determined when protruding into dynamic cylinder, and hold-down bars ejects measuring rod, and the length that measuring rod is ejected part is that hold-down bars protrudes into tuneLength in knothole, that is, the length of curved rod, the length that measuring rod is ejected part are read by the length scale on measuring rodOut；
After curved rod length determines, drive is determined bolt rotation, determines bolt and jack up jam-packed block, make by stubborn handle, fixed twist calmly for rotationJam-packed block is obtained by hold-down bars jam-packed, hold-down bars, which is located at, at this time determines to prevent hold-down bars from deviating in groove and dynamic groove；
Upper roller lower edge is concordant with fixation hole top edge, and hold-down bars, which protrudes into the part in adjustment hole, can be located at upper wheel grooveIt is interior, dynamic stubborn handle is rotated, moves and twists dynamic bolt rotation is driven, dynamic bolt drives U-shaped frame to move up, so that the lower whorl groove card of bottom rollerOn hold-down bars so that hold-down bars can only be moved along the rotation direction of upper roller and bottom roller and cannot front and back move up and down；
Two hand of operator holds dynamic handle respectively and determines handle, then presses handle down, moves handle and drives dynamic cylinder around hingeContact rotation, and then hold-down bars is bent, the crooked place of hold-down bars is jam-packed block left end, since jam-packed block left end is located atRight above hinge joint, determine that groove is parallel with safety barrel bottom surface, the plane where the shaft of all upper rollers is put down with dynamic cylinder bottom surfaceRow, therefore the angle between safety barrel bottom surface and dynamic cylinder bottom surface is the bending angle of hold-down bars, is swept by dynamic cylinder bottom surfaceThe circular scale on mounting plate crossed accurately to control the angle of curved rod, when carrying out curved rod, can occur between dynamic cylinder and hold-down barsRelative movement, will to generate very big frictional force between hold-down bars and dynamic cylinder, and then in fixation if using and frictionally securingStick surface generates burr, and then damages hold-down bars, can become sliding friction using upper roller and bottom roller as idler wheel friction, preventDamage hold-down bars；
After the completion of curved rod, unscrews dynamic stubborn handle and calmly stubborn handle respectively, hold-down bars is extracted out, if hold-down bars bending angle is spentGreatly, jam-packed block can be extracted out, increases passage space of the hold-down bars in fixation hole.
Compared with the prior art, the invention has the beneficial effects that：
Spinal pedicle internal fixation bar bending device of the present invention and its working method, structure is simple, meets mechanicsIt is required that easy to operate, according to curved rod angle is needed in preoperative imaging data surveying, curved rod angle controllable precise, selection is properlyAngle, the success of curved rod.Solve curved rod difficulty or curved rod angle inaccuracy, surface of a wound exposure duration mistake in clinical operationLong disadvantage.Operating time is reduced, the incidence of the complication such as wound infection is reduced, increases the safety of clinical use.
Detailed description of the invention
Fig. 1 is schematic diagram of the embodiment of the present invention；
Fig. 2 is the Section A-A schematic diagram of embodiment illustrated in fig. 1 movable plate；
Fig. 3 is embodiment illustrated in fig. 1 section B-B schematic diagram.
In figure：1, limit film；2, measuring rod；3, handle is moved；4, measured hole；5, cylinder is moved；6, upper roller；7, mounting plate；8,Hold-down bars；9, safety barrel；10, threaded hole is moved；11, jam-packed block；12, determine handle；13, bottom roller；14, U-shaped frame；15, bearing；16,Dynamic bolt；17, stubborn handle is moved；18, circular scale；19, determine groove；20, fixation hole；21, groove is moved；22, determine bolt；23, determine spiral shellPit；24, handle is twisted surely；25, adjustment hole.
Specific embodiment
The embodiment of the present invention is described further with reference to the accompanying drawing：
As shown in Figure 1-Figure 3, spinal pedicle internal fixation bar bending device of the present invention, including mounting plate 7, installationPlate 7 is rounded, and safety barrel 9 and dynamic cylinder 5 is arranged in 7 upper side of mounting plate；
Safety barrel 9 is fixed on mounting plate 7, moves 5 right end lower part of cylinder together with 9 left end lower hinge of safety barrel, hinge jointIn 7 center location of mounting plate, safety barrel 9 is fixed on mounting plate 7, and 9 inner hollow of safety barrel is fixation hole 20,20 cross section of fixation holeIn rectangle, groove 19 is determined in the setting of 20 upper side of fixation hole, and jam-packed block 11 is cooperated in fixation hole 20, and 11 cross section of jam-packed block is in squareShape, 11 height of jam-packed block are less than the height of fixation hole 20, are arranged dynamic groove 21 on 11 upper surface of jam-packed block, 11 width of jam-packed block and solidDetermine the width fits in hole 20,11 left end of jam-packed block is located at right above hinge joint, and threaded hole 23 is determined in the setting of 9 lower part of safety barrel, determines screw threadBolt 22 is determined in cooperation in hole 23, determines 22 upper end of bolt and is against on 11 bottom surface of jam-packed block, and it is fixed fixed stubborn 24 to determine 22 lower part of bolt；
Dynamic 5 inner hollow of cylinder is adjustment hole 25, and several upper rollers 6, several upper rollers 6 are installed in 25 top of adjustment holeSpecification is identical, and all upper rollers 6 are in the same plane, takes turns groove in the circumferential setting of upper roller 6, U is arranged below upper roller 6Shape frame 14, U-shaped frame 14 is interior to install two bottom rollers 13, and the circumferential setting lower whorl groove of bottom roller 13 moves the dynamic screw thread of 5 lower part of cylinder settingHole 10 is moved and cooperates dynamic bolt 16 in threaded hole 10, and dynamic 16 upper end of bolt is fixed in 15 inner ring of bearing, and 15 outer ring of bearing is fixed onOn 14 bottom surface of U-shaped frame, it is fixed dynamic stubborn 17 to move 16 lower end of bolt；
Circular scale 18 is set on mounting plate 7, and circular scale 18 is determined groove 19, moved using 9 lower surface of safety barrel as zero graduation lineGroove 21, upper wheel groove and lower whorl groove in the same plane, determine that groove 19 is parallel with 9 bottom surface of safety barrel, all upper rollers 6Plane where shaft is parallel with dynamic 5 bottom surface of cylinder, meanwhile, when fixation hole 20 and adjustment hole 25 on the same line when, upper rollingIt is concordant with 20 top edge of fixation hole to take turns 6 lower edges.
Dynamic 5 left end of cylinder blocks, and is arranged measured hole 4 at closure, conjunction measuring bar 2 in measured hole 4,2 length of measuring rod withDynamic 5 length of cylinder is consistent, and length scale, the fixed limit film 1 in 2 outer end of measuring rod are arranged on measuring rod 2, and limit film 1 prevents measuring rod 2Deviate from the right side of measured hole 4.
Mounting rod right lower quadrant determines handle 12, moves 5 left end of cylinder and fixes dynamic handle 3, operator is hand-held to be moved handle 3 and determineHandle 12 is operated, and manpower is saved.
Determining groove 19, dynamic groove 21, upper wheel groove and lower whorl groove cross section is V-arrangement, two medial surfaces of V-arrangement not only withThe periphery of hold-down bars 8 is tangent, prevents hold-down bars 8 from deviating from, and can adapt to the hold-down bars 8 of different-diameter.
Operation principle and process：
Dynamic cylinder 5 is rotated, so that fixation hole 20 and adjustment hole 25 on same central axes, are then protruded into from 9 right end of safety barrel solidDetermine stick 8, for hold-down bars 8 when protruding into dynamic cylinder 5, hold-down bars 8 ejects measuring rod 2, and the length that measuring rod 2 is ejected part isHold-down bars 8 protrudes into the length in adjustment hole 25, that is, the length of curved rod, and the length that measuring rod 2 is ejected part passes through measurementLength scale on bar 2 is read；
After curved rod length determines, rotate it is fixed twist 24,24 drives are determined bolt 22 and are rotated by fixed twist, and determine bolt 22 for jam-packed block11 jack up, so that jam-packed block 11, by 8 jam-packed of hold-down bars, hold-down bars 8, which is located at, at this time determines to prevent from fixing in groove 19 and dynamic groove 21Stick 8 deviates；
6 lower edge of upper roller is concordant with 20 top edge of fixation hole, hold-down bars 8 protrude into the part in adjustment hole 25 can be located at it is upperIt takes turns in groove, rotation is dynamic to twist 17, and dynamic twist rotates the dynamic bolt 16 of 17 drives, and dynamic bolt 16 drives U-shaped frame 14 to move up, so that underThe lower whorl groove of idler wheel 13 is stuck on hold-down bars 8, so that hold-down bars 8 can only be moved along the rotation direction of upper roller 6 and bottom roller 13It is dynamic and cannot front and back move up and down；
Two hand of operator holds dynamic handle 3 respectively and determines handle 12, then presses handle 3 down, moves handle 3 and drives dynamic cylinder5 rotate around hinge joint, and then hold-down bars 8 is bent, and the crooked place of hold-down bars 8 is 11 left end of jam-packed block, due to jam-packed11 left end of block is located at right above hinge joint, determine that groove 19 is parallel with 9 bottom surface of safety barrel, putting down where the shaft of all upper rollers 6Face is parallel with dynamic 5 bottom surface of cylinder, therefore the angle between 5 bottom surface of 9 bottom surface of safety barrel and dynamic cylinder is the bending angle of hold-down bars 8Degree accurately controls the angle of curved rod by moving the circular scale 18 on the inswept mounting plate 7 of 5 bottom surface of cylinder, when carrying out curved rod,It can be relatively moved between dynamic cylinder 5 and hold-down bars 8, will to produce between hold-down bars 8 and dynamic cylinder 5 if using and frictionally securingRaw very big frictional force, and then burr is generated on 8 surface of hold-down bars, and then damage hold-down bars 8, use upper roller 6 and bottom roller13 can become sliding friction as idler wheel friction, prevent damage hold-down bars 8；
After the completion of curved rod, unscrews dynamic twist respectively and twisted with fixed 24 17, hold-down bars 8 is extracted out, if 8 bending angle of hold-down barsIt spends greatly, jam-packed block 11 can be extracted out, increase passage space of the hold-down bars 8 in fixation hole 20.