CN107802337B - Limiting adjustable pre-tightening positioning device - Google Patents
Limiting adjustable pre-tightening positioning device Download PDFInfo
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- CN107802337B CN107802337B CN201711194340.2A CN201711194340A CN107802337B CN 107802337 B CN107802337 B CN 107802337B CN 201711194340 A CN201711194340 A CN 201711194340A CN 107802337 B CN107802337 B CN 107802337B
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- slider
- intramedullary nail
- locating lever
- positioning
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- 238000000034 method Methods 0.000 description 7
- 210000000988 bone and bone Anatomy 0.000 description 5
- 208000010392 Bone Fractures Diseases 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 210000002303 tibia Anatomy 0.000 description 3
- 230000008685 targeting Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/90—Guides therefor
Abstract
The application discloses pretension positioner with adjustable it is spacing, including locating lever, second slider, the concave spout that holds of second slider is equipped with the locating lever, the second slider pass through spout slidable mounting in locating lever one end, the second slider is followed the locating lever axis slides, the second slider with the locating lever passes through a set screw to be fixed, the locating lever in a plurality of circular recesses have been arranged in concave arrangement of set screw fixed side, set screw passes through circular recess location. The invention has the advantage that the position of the circular groove for positioning the second sliding block is selected according to the size of the intramedullary nail, so that accurate positioning is realized.
Description
Technical Field
The application relates to a medical instrument, in particular to a limiting adjustable pre-tightening positioning device.
Background
When a fracture of the tibia needs to be fixed by an intramedullary nail, how to accurately and conveniently fix the intramedullary nail is always a problem in the industry.
Disclosure of Invention
The invention aims to provide a limiting adjustable pre-tightening positioning device for accurately positioning an intramedullary nail.
In order to achieve the above purpose, the present invention provides the following technical solutions.
The embodiment of the application discloses pretension positioner with adjustable spacing, including locating lever, second slider, the second slider is concave to be equipped with to hold the spout of locating lever, the second slider pass through spout slidable mounting in locating lever one end, the second slider is followed the locating lever axis slides, the second slider with the locating lever passes through a set screw to be fixed, the locating lever in a plurality of circular recesses have been arranged in the concave arrangement of set screw fixed side, set screw passes through circular recess location, the second slider is connected and is fixed in L shape support xarm, the locating lever deviates from the one end connection of second slider is fixed in aiming support, L shape support vertical arm bottom and intramedullary nail proximal end connection are fixed, the locating lever with the intramedullary nail is located L shape support is with one side, the locating lever axis with intramedullary nail distal end axis is parallel.
Preferably, in the above-mentioned spacing adjustable pre-tightening positioning device, the second slider and the L-shaped bracket are detachably riveted by bolts.
Preferably, in the above-mentioned spacing adjustable pre-tightening positioning device, the positioning rod and the aiming bracket are detachably riveted by bolts.
Preferably, in the above-mentioned limiting adjustable pre-tightening positioning device, the L-shaped bracket cross arm is parallel to the proximal axis of the intramedullary nail.
Preferably, in the above-mentioned spacing adjustable pre-tightening positioning device, the positioning rod and the second slider are leveled at the opening of the chute.
Preferably, in the above-mentioned spacing adjustable pre-tightening positioning device, the section of the positioning rod is trapezoidal.
Preferably, in the above-mentioned spacing adjustable pre-tightening positioning device, the length of the cross section of the positioning rod located inside the chute is greater than the length of the cross section located at the opening of the chute.
Compared with the prior art, the invention has the advantages that the length of the intramedullary nail is different due to different heights of people when the operation is performed, so that the position of the aiming bracket is required to be confirmed before the distal end of the intramedullary nail is fixed during the operation, and the positioning rod is parallel to the distal end axis of the intramedullary nail due to the fact that the second sliding block slides along the axis of the positioning rod, so that the positioning rod can not influence the positioning of the distal screw hole of the intramedullary nail by the aiming bracket when the length is adjusted, and the position of the circular groove positioned by the second sliding block is selected according to the size of the intramedullary nail, thereby realizing accurate positioning.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a tibial adjustable locking intramedullary nail aiming device in accordance with an embodiment of the present invention;
FIG. 2 is an exploded view of an intramedullary nail, a shaft, and an L-shaped bracket according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a perspective view of an L-shaped bracket according to an embodiment of the present invention;
FIG. 5 is an enlarged view of the junction of the intramedullary nail and the shaft of FIG. 3;
FIG. 6 is an enlarged view of the joint of the rotating blocks of FIG. 3;
FIG. 7 is a schematic view of the internal structure of the rotary block;
FIG. 8 is a schematic view of the internal structure of a rotary block from another perspective;
FIG. 9 is a schematic perspective view of a positioning rod according to an embodiment of the present invention;
FIG. 10 is a schematic view illustrating the connection of a first ejector pin according to an embodiment of the present invention;
FIG. 11 is a schematic perspective view of a first ejector rod according to an embodiment of the present invention;
FIG. 12 is a diagram illustrating the application of the aiming block in a third position according to an embodiment of the present invention;
FIG. 13 is a schematic perspective view of a sliding device according to an embodiment of the present invention;
fig. 14 is a schematic perspective view of an aiming bracket according to an embodiment of the present invention.
Detailed Description
The following detailed description of the technical solutions according to the embodiments of the present invention will be given with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Intramedullary nails are generally fold-line shaped with a proximal and distal axis that is different.
Referring to fig. 1-8, the proximal multi-directional adjustable fixing device comprises a rotating shaft 110, an intramedullary nail 400 and an L-shaped bracket 120, wherein one end of the rotating shaft 110 is fixedly connected with the proximal end of the intramedullary nail 400, the other end of the rotating shaft is rotatably connected with a vertical arm of the L-shaped bracket 120, the axis of the rotating shaft 110 is the same as that of the proximal end of the intramedullary nail 400, a cross arm of the L-shaped bracket 120 is parallel to that of the proximal end of the intramedullary nail 400, the vertical arm of the L-shaped bracket 120 rotates around the axis of the rotating shaft 110, 6-8 positioning slots 119 are arranged on one side surface of the rotating shaft 110, which is close to the L-shaped bracket 120, positioning windows 122 with the positions of the positioning slots 119 are formed in the vertical arm of the L-shaped bracket 120, first screw holes 410 with the same number of the positioning slots 119 in different directions are formed on the proximal side surface of the intramedullary nail 400, and when the positioning windows 122 rotate to any one of the positioning slots 119, namely, the second positioning holes 121 are the same as that of the first screw holes 410 are one of the second positioning holes, and the first screw holes are in one-to-one position by adjusting the positioning slots.
By adopting the technical scheme, when the proximal end of the intramedullary nail is fixed, the L-shaped bracket is only required to be rotated, the positioning grooves are used for determining the positions of the intramedullary nail holes and the positioning holes on the L-shaped bracket, and the fixing screws can be directly driven into the positioning holes on the L-shaped bracket to drive screw holes on the intramedullary nail to realize fixation, so that the operation is convenient and the positioning is accurate.
Further, the cross arm of the L-shaped bracket 120 includes two symmetrically arranged elastic arms, and a lock catch 123 is disposed at one end of the elastic arms facing away from the vertical arm.
Referring to fig. 4, the sleeve is conveniently fixed when the screw is driven.
Further, the side of the L-shaped bracket 120 is provided with the slots 124, the number of which is the same as that of the second positioning holes 121, each slot 124 is provided at the outer side of each second positioning hole 121, and the extending direction of the slot 124 is parallel to the axis of the corresponding second positioning hole 121.
And in combination with the illustration of fig. 4, the direction of the positioning hole can be known directly through the direction of the external wire slot, so that the method is convenient and quick.
Further, the positioning grooves 119 corresponding to the second positioning holes 121 and the surfaces of the wire grooves 124 are coated with the same color, and the colors of the surfaces of the different positioning grooves 119 are different.
When the need know the constant head tank and which locating hole corresponds, directly look at the colour on constant head tank and wire casing surface can, after the location window rotates, rotate the constant head tank to certain colour, then find the same colour wire casing, just can confirm at once that the second locating hole of this colour that should beat the screw this moment, further improvement efficiency.
Further, the bottom of the vertical arm of the L-shaped bracket 120 is fixedly connected to a rotating block 130, the rotating block 130 rotates around the axis of the rotating shaft 110, and the positioning window 122 is formed in the rotating block 130.
This solution is preferred, as shown in connection with fig. 6, although other means are of course within the scope of the present application.
Further, the outer surface of the rotating shaft 110 is provided with N strip-shaped grooves 101 corresponding to the array of the positioning grooves 119, the strip-shaped grooves 101 are parallel to the axis of the rotating shaft 110, the positioning grooves 119 are positioned on the extending line of the strip-shaped grooves 101 corresponding to the positioning grooves 119, the rotating block 130 is provided with a cavity 131 for accommodating the rotating shaft 110, the inside of the cavity 131 is sequentially supported and provided with a strip-shaped press button 132, a first strip-shaped pin 133 and a second strip-shaped pin 134 from top to bottom, the strip-shaped press button 132 is vertical to the first strip-shaped pin 133, the second strip-shaped pin 134 is parallel to the strip-shaped press button 132, the bottom of the second strip-shaped pin 134 is accommodated in the strip-shaped groove 101, one end of the strip-shaped press button 132 protrudes out of the rotating block 130, the other end of the strip-shaped press button 132 is abutted against the first spring 135, the other end of the first spring 135 is abutted against the inner surface of the rotating block 130, the bottom of the strip-shaped press button 132 is provided with a first groove 136 for accommodating the first strip-shaped press button 133,
when the bar button 132 is located at the first position, the first bar pin 133 abuts against the bottom of one end of the bar button 132 far away from the first groove 136, the second bar pin 134 abuts against the bottom of the first bar pin 133, and the bottom of the second bar pin 134 is supported by the bar groove 101;
when the button 132 is in the second position, the first bar-shaped pin 133 is located in the first groove 136, and the second bar-shaped pin 134 rolls along its axis on the surface of the rotating shaft 110.
7-8, this is an embodiment of this application, when the bar presses the button to press inwards, because the first recess of its bottom, first bar round pin body gets into first recess for do not support each other between first bar round pin body and the upper and lower each part, and rotatory bulk can rotate this moment, drives whole L shape support, and select which second locating hole that needs, just need confirm the constant head tank promptly can, selected, loosen the bar and press the button, owing to the existence of first spring, pop out the bar and press the button, all parts support each other from top to bottom can not become flexible, can drive the screw of corresponding second locating hole according to the constant head tank of selecting this moment.
Further, when the snap button 132 is in the first position, the first spring 135 is in an extended state, and when the snap button 132 is in the second position, the first spring 135 is in a compressed state.
Further, an elastic protruding member 117 is disposed at the bottom of the rotating shaft 110, and the elastic protruding member 117 abuts against the inner surface of the rotating block 130.
By adopting the technical scheme, the whole structure is stable.
Further, the outer surface of the rotating shaft 110 protrudes outwards to form a first annular supporting surface 118, and the first annular supporting surface 118 abuts against the rotating block 130.
By adopting the technical scheme, the whole structure is stable.
Further, one end of the first bar-shaped pin body 133 is fixedly installed to the rotary block 130.
By adopting the technical scheme, the whole structure is stable.
Referring to fig. 1 and 9, the limiting adjustable pre-tightening positioning device comprises a positioning rod 210 and a second sliding block 220, wherein a sliding groove 221 for accommodating the positioning rod 210 is concavely formed in the second sliding block 220, the second sliding block 220 is slidably mounted at one end of the positioning rod 210 through the sliding groove 221, the second sliding block 220 slides along the axis of the positioning rod 210, the second sliding block 220 is fixed with the positioning rod 210 through a fixing screw 230, a plurality of circular grooves 211 are concavely formed in the fixed side surface of the positioning rod 210, the fixing screw 230 is positioned through the circular grooves 211, the second sliding block 220 is fixedly connected with a cross arm of the L-shaped bracket 120, one end, deviating from the second sliding block 220, of the positioning rod 210 is fixedly connected with the aiming bracket 310, the bottom of a vertical arm of the L-shaped bracket 120 is fixedly connected with the proximal end of the intramedullary nail 400, the positioning rod 210 is positioned at the same side of the L-shaped bracket 120, and the axis of the positioning rod 210 is parallel with the distal axis of the intramedullary nail 400.
When the intramedullary nail is operated, the length of the intramedullary nail is different due to different heights of people, so that the position of the aiming bracket is required to be confirmed before the distal end of the intramedullary nail is fixed during operation, the second sliding block slides along the axis of the positioning rod and the positioning rod is parallel to the axis of the distal end of the intramedullary nail, the positioning rod can not influence the positioning of the positioning bracket to position the screw hole at the distal end of the intramedullary nail when adjusting the length, the position of the circular groove for positioning the second sliding block is selected according to the size of the intramedullary nail, and the aiming bracket and the screw hole at the distal end of the intramedullary nail are positioned, so that the adjustable aiming device of the distal end parallel positioning platform is seen.
Further, the second slider 220 is detachably riveted with the L-shaped bracket 120 by bolts. The positioning rod 210 is detachably riveted with the aiming bracket 310 by bolts.
Riveting is preferred, although other connections, such as snaps, etc., may be implemented and are intended to fall within the scope of the present application.
Further, the cross-arm of the L-shaped bracket 120 is parallel to the proximal axis of the intramedullary nail 400.
Further, the positioning rod 210 and the second slider 220 are leveled at the opening of the sliding slot 221.
Further, the positioning rod 210 has a trapezoidal cross section. The sectional length of the positioning rod 210 located inside the chute 221 is greater than the sectional length located at the opening of the chute 221.
The whole stability of the structure is ensured.
Referring to fig. 1 and fig. 10-14, the adjustable aiming device with a parallel locating platform at the far end comprises an intramedullary nail 400, an L-shaped bracket 120, a locating rod 210 and an aiming bracket 310, wherein the near end of the intramedullary nail 400 is fixedly arranged at the bottom of a vertical arm of the L-shaped bracket 120, the locating rod 210 is fixedly connected with a cross arm of the L-shaped bracket 120, the locating rod 210 and the intramedullary nail 400 are positioned at the same side of the L-shaped bracket 120, the axis of the locating rod 210 is parallel to the far end axis of the intramedullary nail 400 and forms a first plane, the aiming bracket 310 is movably arranged at one end of the locating rod 210 far away from the L-shaped bracket 120, the moving direction of the aiming bracket is perpendicular to the first plane, the aiming bracket 310 is provided with a first locating hole 311 and a developing hole 312, the axis of which is parallel to the first plane, the far end of the intramedullary nail 400 is provided with a second screw hole 440 and a third screw hole 450 in parallel to the axial direction, the axes of the second screw hole 440 and the third screw hole 450 are respectively parallel to the first plane and perpendicular to the far end axis of the intramedullary nail 400, when the aiming bracket 310 is positioned at the third position, the second screw hole 440 is identical to the axis of the first locating hole 311, the third axis is identical to the axis of the first locating hole 320, the third screw hole 450 and the developing hole 320 is also provided with the first locating post 320, and the locating post 320 is detachable from the first locating post 320. The positioning post 320 is detachably fixed to the second screw hole 440 by screw threads.
In combination with the illustration of fig. 1, the positions of the aiming bracket and the positioning rod are confirmed, then the positioning rod and the aiming bracket are removed integrally, the intramedullary nail is driven into the position to be operated, after the intramedullary nail is driven into the position to be operated, the positioning rod and the aiming bracket are installed according to the original position, the original second screw hole and the third screw hole can be slightly misplaced with the corresponding first positioning hole and developing hole due to the stress action, but the length of the first screw hole and the third screw hole cannot be changed, namely the axial distance of the intramedullary nail cannot be changed, namely the misplacement direction of the far end of the intramedullary nail is not changed as seen from the view angle in fig. 1, the left and right length of the intramedullary nail can be deflected upwards and downwards or forwards and backwards, the second screw hole and the third screw hole are parallel to the first plane and perpendicular to the far end axis of the intramedullary nail after the intramedullary nail is driven into the first plane, the first step is adjusted to be capable of adjusting the position of the developing rod and the third screw hole by the external device, namely the first step is moved perpendicular to the first plane, namely the intramedullary nail can be moved upwards and backwards through the first positioning post is moved, and the positioning post can be moved forwards and can be moved backwards through the positioning post if the positioning post is finally moved.
Further, the aiming bracket 310 further includes a third positioning hole 313, the axis of the third positioning hole 313 is perpendicular to the first plane, a square groove 460 is concavely formed at the distal end of the intramedullary nail 400, and the aiming bracket 310 further includes a first ejector rod 330, when the aiming bracket 310 is located at the third position, the first ejector rod 330 passes through the third positioning hole 313 and abuts against the square groove 460. The outer surface of the middle part of the first ejector rod 330 is concavely provided with a first annular groove 331, the aiming bracket 310 is provided with a first elastic stop block 332, the first ejector rod 330 vertically passes through the first elastic stop block 332, one side of the first ejector rod is propped against the first elastic stop block 332, the thickness of the first elastic stop block 332 is slightly smaller than the height of the first annular groove 331, and when the aiming bracket 310 is positioned at a third position, the first elastic stop block 332 is propped against the first annular groove 331 of the first ejector rod 330. The first elastic stopper 332 protrudes from the aiming bracket 310.
By adopting the technical scheme, the traditional doctor prefers to position by adopting the ejector rod, because the deflection of the intramedullary nail only has upward deflection as in most cases in fig. 1, and has no front-back and downward deflection, the ejector rod is quite convenient to be inserted into and abutted against the intramedullary nail, and then the ejector rod is spaced from an elastic stop block on the aiming bracket through a groove of the ejector rod, as shown by 10-11 in the figure, so that the positioning of the intramedullary nail is quite easy to realize.
Further, the aiming bracket 310 is further provided with a fourth positioning hole 314 and a fifth positioning hole 315 which are in different directions from the first positioning hole 311, the distal end of the intramedullary nail 400 is provided with a fourth screw hole 470 and a fifth screw hole 480, and when the aiming bracket 310 is positioned at the third position, the axial leads of the fourth positioning hole 314 and the fourth screw hole 470 are the same, and the axial leads of the fifth positioning hole 315 and the fifth screw hole 480 are the same.
As shown in fig. 10 and 12, is used to staple and fix the intramedullary nail to the bone of a person.
Further, the aiming bracket 310 is movably mounted on the positioning rod 210 through a sliding device 340, the sliding device 340 includes a first sliding block 341 connected to and fixing the aiming bracket 310, and a connecting block 342 supporting and fixing the first sliding block 341, the connecting block 342 is fixedly connected to the positioning rod 210, a linear gear 343 is disposed on a side of the first sliding block 341 facing away from the aiming bracket 310, the extending direction of the linear gear 343 is perpendicular to the first plane, the sliding device further includes a turntable 345 fixedly mounted on the connecting block 342, a first gear 346 coaxially fixed to the turntable 345 is disposed inside the turntable, and the first gear 346 is meshed with the linear gear 343.
This is an embodiment of the present application, and the movement of aiming support is realized through the regulation of carousel, because the sharp gear of first slider is perpendicular to first plane, has guaranteed that aiming support can only follow the direction of perpendicular to first plane and remove.
Further, a second gear 347 coaxially fixed to the first gear 346 is further disposed inside the turntable 345, the number of teeth of the second gear 347 is greater than that of the first gear 346, and the turntable further includes a screw 348, threads are disposed on an outer surface of the screw 348, the threads on the outer surface of the screw 348 engage with the second gear 347, and the screw 348 protrudes from the turntable 345. One end of the screw 348 is rotatably mounted inside the turntable 345, and the screw 348 is disengaged from the second gear 347.
The second gear is driven by the screw, the first gear is driven by the second gear, the sliding block is driven by the first gear, fine adjustment is realized, and when the screw is separated, coarse adjustment is realized by directly adjusting through the turntable.
Further, a second annular groove is concavely formed in the outer surface of the middle of the positioning post 320, a second elastic stop block 321 is installed on the aiming bracket 310, the positioning post 320 vertically penetrates through the second elastic stop block 321, one side of the positioning post is propped against the second elastic stop block 321, the thickness of the second elastic stop block 321 is slightly smaller than the height of the second annular groove, when the aiming bracket 310 is located at a third position, the second elastic stop block 321 is propped against the second annular groove of the positioning post 320, and the second elastic stop block 321 protrudes from the aiming bracket 310.
The positioning distance of the positioning column is consistent with that of the first ejector rod, and the positioning can be realized only by clamping the second elastic stop block with the second annular groove.
Referring to fig. 1, 2, 3, 5 and 6, the tibia adjustable intramedullary nail sighting device with lock comprises a rotating shaft 110, an L-shaped bracket 120, a positioning rod 210 and a sighting bracket 310, wherein one end of the rotating shaft 110 is fixedly connected with the proximal end of the intramedullary nail 400, the other end of the rotating shaft is rotatably connected with a vertical arm of the L-shaped bracket 120, the axis of the rotating shaft 110 is the same as that of the proximal end of the intramedullary nail 400, a cross arm of the L-shaped bracket 120 is parallel to the axis of the proximal end of the intramedullary nail 400, the vertical arm of the L-shaped bracket 120 rotates around the axis of the rotating shaft 110, the proximal side of the intramedullary nail 400 is provided with a plurality of first screw holes 410 with different directions, the cross arm of the L-shaped bracket 120 is provided with a plurality of second positioning holes 121 corresponding to the first screw holes 410, one end of the positioning rod 210 is fixedly arranged on the cross arm of the L-shaped bracket 120, the length of the positioning rod 210 is adjustable, the positioning rod 210 is parallel to the distal axis of the intramedullary nail 400 and forms a first plane, the sighting bracket 310 is vertically arranged on one end of the positioning rod 210 away from the L-shaped bracket 120 along the first plane, the aiming bracket 310 is provided with a first positioning hole 311 and a developing hole 312, notches 420 are concavely arranged at two sides of the end surface of the intramedullary nail 400 connected with the rotating shaft 110, an inner thread 430 is arranged on the inner surface of one end of the intramedullary nail 400 connected with the rotating shaft 110, the rotating shaft 110 comprises a first round rod 111 and a second round rod 112 with the same axial lead, a convex body 113 filling the notches 420 is convexly extended on the end surface of one end of the first round rod 111, an external thread 114 matching with the inner thread 430 of the intramedullary nail 400 is arranged on the outer surface of one end of the second round rod 112, a second annular supporting surface 115 perpendicular to the axial line of the second round rod 112 is arranged at one end of the second round rod 112 facing away from the external thread 114, the first round rod 111 is meshed with the intramedullary nail 400, the second round rod 112 penetrates through the first round rod 111 along the axial line and is connected with the intramedullary nail 400 through threads, the second annular supporting surface 115 is propped against one end surface of the first round rod 111 facing away from the intramedullary nail 400, the second annular supporting surface 115 abuts against the L-shaped bracket 120, and further includes a second ejector rod 116, where the second ejector rod 116 penetrates the second round rod 112 along a proximal axis of the intramedullary nail 400 and is detachably fixed to the second round rod 112, and at least 1 first screw hole 410 protrudes along an axial direction of the intramedullary nail 400, and the second ejector rod 116 extends to the first screw hole 410. The second ejector rod 116 is screwed with the second round rod 112.
When the proximal end of the intramedullary nail is fixed, before nailing, the reset broken bone needs to be pushed tightly, so that the treatment effect can be achieved, the accurate fixation of the intramedullary nail is realized through the first round rod and the second round rod of the rotating shaft, when the first nail is driven, the first screw hole with the axial protruding extension is selected, the first screw hole with the reference number 410 in fig. 5 is driven, the nail is pushed to the distal end of the intramedullary nail through the second ejector rod after the nail is driven, and the pushing can be conveniently realized due to the fact that the second ejector rod is detachably connected with the second round rod through threads, the broken bone is attached to each other, and then the fixation of the proximal end of the intramedullary nail is realized through fixing other bone nails.
Further, the bottom of the vertical arm of the L-shaped bracket 120 is fixedly connected to a rotating block 130, and the rotating block 130 rotates around the axis of the rotating shaft 110.
Further, an elastic protruding member 117 is disposed at the bottom of the rotating shaft 110, and the elastic protruding member 117 abuts against the inner surface of the rotating block 130.
Further, the outer surface of the rotating shaft 110 protrudes outwards to form a first annular supporting surface 118, and the first annular supporting surface 118 abuts against the rotating block 130.
The overall operation mode of the device is as follows: when the tibia of a human body is required to be reset, the device can be adopted, firstly, a proper intramedullary nail is adopted, the proximal end of the intramedullary nail is connected and fixed on a rotating shaft, the rotating shaft is fixed by adopting occlusion and threaded connection, so that the position of the intramedullary nail can be accurately positioned, an L-shaped bracket vertical arm rotates around the proximal axis of the intramedullary nail, an L-shaped bracket cross arm is always parallel to the proximal axis of the intramedullary nail, the positioning rod is adjusted and positioned through a sliding block, the positioning rod can be fixed in a first positioning hole when being fixed, a hole is realized, the length of the intramedullary nail is a certain specific size, the positioning rod is parallel to the distal axis of the intramedullary nail and forms a first plane through a circular groove on the positioning rod, a targeting bracket can only move in the direction vertical to the first plane, a second screw hole is parallel to a third screw hole and is vertical to the distal axis of the intramedullary nail, only the first positioning hole and a developing hole on the targeting bracket are required to be adjusted, firstly, the upper position and the lower position are confirmed through the developing rod, then the positioning rod is used for realizing the positioning in the front and back direction through the positioning rod, the positioning rod is also used for setting a plurality of symmetrical nail, and the length of the nail is also arranged in the opposite to the first positioning hole and the other positioning holes are symmetrically arranged, and the bone nail is far away from the first positioning holes are symmetrically;
after the distal end of the intramedullary nail and the bone are fixed by the screw, the aiming bracket is removed, the positioning rod is also removed, one of the first screw holes axially protrudes, the position is fixed at first, the rotating position of the L-shaped bracket is selected by color distinction on the positioning groove, when the intramedullary nail rotates to the position, the screw is driven in, the broken bone is tightly propped up by the second ejector rod, then the L-shaped bracket rotates to different positions and drives in the screw at the corresponding position, and the fixation of the proximal end of the intramedullary nail and the bone is realized.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely exemplary of the application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the application and are intended to be comprehended within the scope of the application.
Claims (5)
1. The utility model provides a pretension positioner with adjustable spacing, its characterized in that includes locating lever, second slider, the concave spout that holds of second slider, the second slider pass through spout slidable mounting in locating lever one end, the second slider is followed the locating lever axis slides, the second slider with the locating lever passes through a set screw to be fixed, the locating lever in a plurality of circular recesses of arranging are concavely established to the side that set screw is fixed, set screw passes through circular recess location, the second slider is connected to be fixed in L shape support xarm, the locating lever deviates from the one end connection of second slider is fixed in the aiming support, L shape support vertical arm bottom is connected fixedly with the intramedullary nail proximal end, the locating lever with the intramedullary nail is located L shape support same one side, the locating lever axis with intramedullary nail distal end axis is parallel, L shape xarm with the intramedullary nail proximal axis is parallel, the locating lever with the second slider is in the spout is held in the leveling.
2. The adjustable-spacing pre-tightening positioning device according to claim 1, wherein the second slider is detachably riveted with the L-shaped bracket by bolts.
3. The adjustable spacing pre-tightening positioning device of claim 1, wherein the positioning rod is detachably riveted with the aiming bracket by bolts.
4. The spacing adjustable pre-tightening positioning device according to claim 1, wherein the positioning rod is trapezoidal in cross section.
5. The adjustable-spacing pre-tightening positioning device according to claim 4, wherein the positioning rod has a cross-sectional length inside the chute that is greater than a cross-sectional length at the chute opening.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194340.2A CN107802337B (en) | 2017-11-24 | 2017-11-24 | Limiting adjustable pre-tightening positioning device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711194340.2A CN107802337B (en) | 2017-11-24 | 2017-11-24 | Limiting adjustable pre-tightening positioning device |
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| Publication Number | Publication Date |
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| CN107802337A CN107802337A (en) | 2018-03-16 |
| CN107802337B true CN107802337B (en) | 2024-04-09 |
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| CN201711194340.2A Active CN107802337B (en) | 2017-11-24 | 2017-11-24 | Limiting adjustable pre-tightening positioning device |
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|---|---|---|---|---|
| CN2676846Y (en) * | 2003-11-19 | 2005-02-09 | 钱福卿 | Remote and aiming composite femur intrameducllary nail device with lock |
| WO2006136086A1 (en) * | 2005-06-20 | 2006-12-28 | Yijing Yang | An intramedullary nail collimator |
| CN2917570Y (en) * | 2006-06-01 | 2007-07-04 | 常州华森医疗器械有限公司 | Femoral intramedullary nail and rapid sighting device thereof |
| CN105411661A (en) * | 2015-12-31 | 2016-03-23 | 张堃 | Far-end positioning rod for tibia intramedullary nail |
| CN208864471U (en) * | 2017-11-24 | 2019-05-17 | 苏州市康力骨科器械有限公司 | The pre- clamping and positioning device of limit adjustable |
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2017
- 2017-11-24 CN CN201711194340.2A patent/CN107802337B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2676846Y (en) * | 2003-11-19 | 2005-02-09 | 钱福卿 | Remote and aiming composite femur intrameducllary nail device with lock |
| WO2006136086A1 (en) * | 2005-06-20 | 2006-12-28 | Yijing Yang | An intramedullary nail collimator |
| CN2917570Y (en) * | 2006-06-01 | 2007-07-04 | 常州华森医疗器械有限公司 | Femoral intramedullary nail and rapid sighting device thereof |
| CN105411661A (en) * | 2015-12-31 | 2016-03-23 | 张堃 | Far-end positioning rod for tibia intramedullary nail |
| CN208864471U (en) * | 2017-11-24 | 2019-05-17 | 苏州市康力骨科器械有限公司 | The pre- clamping and positioning device of limit adjustable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107802337A (en) | 2018-03-16 |
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