CN219000516U

CN219000516U - Patella fracture reduction and auxiliary fixing device

Info

Publication number: CN219000516U
Application number: CN202222197089.8U
Authority: CN
Inventors: 要星晨; 杜心如; 赵会; 徐子彧; 张扬璞; 张苡齐
Original assignee: Beijing Chaoyang Hospital
Current assignee: Beijing Chaoyang Hospital
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2023-05-12
Anticipated expiration: 2032-08-19

Abstract

The utility model discloses a patella fracture reduction and auxiliary fixing device, which belongs to the technical field of medical appliances and comprises a shell, a guider, an adjusting mechanism, a limiting piece and a plurality of clamping pieces, wherein the clamping pieces are in sliding connection with the shell, part of the clamping pieces are fixedly connected with the guider one by one, the connecting parts of the adjusting mechanism and the clamping pieces are arranged in the shell, the adjusting mechanism is connected with the clamping pieces and drives the clamping pieces to retract inwards or extend outwards from the shell, and the limiting piece is detachably connected with the adjusting mechanism and the shell when the clamping pieces retract to a proper position. The utility model can reduce the patella fracture by the claw structure, simultaneously determine the nail path direction by the guide device, is more convenient, reduces the risk of poor fixing position of the hollow pressurizing screw and even entering the joint surface, and avoids the fracture and displacement of the small bone block caused by reducing the patella fracture of a plurality of fracture lines by the forceps jaws of the towel forceps by the contraction pressurizing and fixing the patella fracture of a plurality of claw structures which are symmetrical in center.

Description

Patella fracture reduction and auxiliary fixing device

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a patella fracture reduction and auxiliary fixing device.

Background

Patellar fracture is one of the common limb fractures in trauma. At present, the conventional operation mode mainly comprises internal fixation of incision reset hollow nails, fixation of cabled screws and fixation of tension belt steel wires, and the reset mode mainly depends on point reset pliers for reset.

Because the patella fracture mainly depends on the point type reduction forceps for reduction, for the patella fracture of osteoporosis and a plurality of fracture lines, the reduction of the forceps clamp is easy to cause the fracture and the displacement of the small bone block, and the fracture or the poor reduction is caused; the guiding problem of the hollow pressurizing screw in fixation is not considered, the hollow pressurizing screw is easy to be positioned in poor position by hand feeling, and the hollow pressurizing screw breaks through the lower joint surface and the like.

Disclosure of Invention

The embodiment of the utility model provides a patella fracture reduction and auxiliary fixing device, which aims to solve the technical problems.

The embodiment of the utility model adopts the following technical scheme: the utility model provides a patella fracture resets and supplementary fixing device, includes casing, director, adjustment mechanism, locating part and a plurality of clamping piece, clamping piece and casing sliding connection, part clamping piece and director one-to-one fixed connection, adjustment mechanism and clamping piece's connecting portion set up inside the casing, and adjustment mechanism and casing rotatable coupling, adjustment mechanism are connected and drive the clamping piece to the casing internal contraction or to the outer extension of casing with the clamping piece, and the locating part can dismantle with adjustment mechanism and casing when the clamping piece contracts suitable position.

Further, the clamping piece sets up around the casing, and the clamping piece divide into two sets of, and two sets of clamping pieces are arranged along the central plane symmetry of casing, and the clamping piece includes claw type structure and connecting rod, and claw type structure is towards the casing, is equipped with the first through hole of a plurality of intercommunications on the claw type structure, but the one end and the upper end fixed connection of claw type structure of connecting rod, but the other end and casing sliding connection, but the below of one section of claw type structure is kept away from to the connecting rod is provided with "T" type draw runner, and the top of one end of claw type structure is kept away from to the connecting rod is provided with columniform slider.

Further, be equipped with the first opening that supplies the connecting rod business turn over on the lateral wall of casing, first open-ended quantity is the same with the quantity of clamping piece, and the top of casing is equipped with the second opening that suits with adjustment mechanism, and the open-ended surface of second is equipped with a plurality of equidistant annular grooves, and the bottom in the casing is provided with and "T" type recess of "T" type draw runner complex, and the outer bottom surface of casing is the cambered surface.

Further, the side fixed connection of director and claw type structure, the one section of director and claw type structure fixed connection is keeping away from the arc structure of casing, and the surface plane of one section of director that keeps away from claw type structure is perpendicular with the shortest line section of surface plane to casing center pin, and one section of director that keeps away from claw type structure is equipped with the second through-hole.

Further, adjustment mechanism includes disc and knob, and the disc sets up inside the casing, is equipped with near the arc logical groove to being close to the edge from the center on the disc, and arc logical groove cooperatees with the slider of connecting rod, and the knob setting is equipped with the third opening on the knob in the top of casing, and the third opening surface is equipped with the screw thread, passes the second opening at casing top and with the center fixed connection of disc with knob integrated into one piece's rotation axis, and the rotation axis is provided with annular groove matched with annular bulge with the surface of second opening contact.

Further, the limiting piece is a hand-screwed screw rod, and when the clamping piece is contracted to a proper position, the hand-screwed screw rod penetrates through the third opening and abuts against the surface of the shell.

The above at least one technical scheme adopted by the embodiment of the utility model can achieve the following beneficial effects:

firstly, the nail way direction is determined through the guide device fixedly connected with the claw structure when the claw structure contracts and pressurizes to reset the patella fracture, so that the nail way direction is more convenient, the hollow pressurizing screw is used for fixing the patella fracture through the guide device, and the risk that the fixing position of the hollow pressurizing screw is poor and even the hollow pressurizing screw enters the joint surface is reduced.

Secondly, the patella fracture is fixed through the contraction and pressurization of a plurality of clamping pieces with central symmetry, so that the patella fracture can be better wrapped, the patella fracture is more uniformly stressed, the fracture and the displacement of small bone blocks or poor reduction and re-fracture of the small bone blocks caused when the patella fracture of the osteoporosis and the multi-position fracture lines is reduced by using the point type reduction forceps are avoided, and the reduction of the patella fracture is facilitated.

Thirdly, the rotary knob can drive the clamping pieces to shrink simultaneously or pressurize or extend outwards through the rotation of the disc, the operation is not needed in each direction, simplicity and convenience are achieved, the condition that pressurization in different directions is inconsistent is avoided, and the stress is more uniform when the patella fracture is reset.

Fourth, the claw-shaped structure contracts to the suitable position and passes the hand screw rod through the second opening on the knob and abuts against the surface of the shell, so that the rotation of the knob can be limited, the rotation of the disc is limited, the outward extension of the clamping piece is limited, the situation that the clamping piece is damaged in the contraction and pressurization of the patella fracture, the error of the nail channel direction determined by the guide fixedly connected to the claw-shaped structure is caused, and the position is poor when the patella fracture is fixed by the follow-up hollow pressurizing screw through the second through hole of the guide is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic diagram of an explosive structure according to the present utility model;

FIG. 3 is a schematic view of a partial perspective structure of the present utility model;

FIG. 4 is a schematic perspective view of an adjusting mechanism according to the present utility model;

FIG. 5 is a schematic perspective view of a connecting rod according to the present utility model;

FIG. 6 is a schematic perspective view of a housing according to the present utility model;

fig. 7 is a schematic perspective view of the hand screw of the present utility model.

Reference numerals:

the clamping piece 1, the claw-shaped structure 11, the first through hole 111, the connecting rod 12, the T-shaped sliding strip 121 and the sliding block 122;

the housing 2, the first opening 21, the second opening 22, the "T" shaped recess 23;

a guide 3, a second through hole 31;

the adjusting mechanism 4, the disc 41, the arc through slot 411, the knob 42, the rotating shaft 421 and the third opening 422;

the limiting piece 5 is screwed with the screw rod 51 by hand.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The following describes in detail the technical solutions provided by the embodiments of the present utility model with reference to the accompanying drawings.

Referring to fig. 1-7, an embodiment of the present utility model provides a patella fracture reduction and auxiliary fixing device, for comminuted patella fracture, fracture blocks are not easy to reduce after the aponeurosis is cut, the device can perform fracture reduction without cutting the aponeurosis, the device comprises a clamping piece 1, a housing 2, a guide 3, a disc 41, a rotating shaft 421, a knob 42 and a screwing screw 51, the outer bottom surface of the housing 2 is a cambered surface attached to the upper edge of the patella, the clamping piece 1 has four clamping pieces, the clamping piece 1 comprises a claw-shaped structure 11 and a connecting rod 12 which is arranged at the top end of the claw-shaped structure 11 and integrally formed with the claw-shaped structure 11, the four clamping pieces 1 are centrally symmetrically arranged around the housing 2 and face the housing 2, when the patella fracture is reduced, the claw-shaped structure 11 can be better attached to and wrap the patella, so that the patella fracture is more uniformly stressed, the fracture and displacement of the small bone blocks caused when the fracture is reduced by a point-type reduction clamp is avoided, two communicated first through holes 111 are arranged on the housing 11, the first through holes 111 are formed by the wire through holes 111, the fixing device is directly wound around the first through the wire through the hole 11 after the wire is reduced by the wire, the wire fracture is not being rotated, and the first through hole 111 is fixed to the wire is directly and the wire-wound around the hole 11, and the first through the hole is fixed to the fracture;

the connecting rod 12 passes through the first opening 21 arranged on the side wall of the shell 2, a T-shaped sliding bar 121 is arranged below a section of the connecting rod 12 far away from the claw-shaped structure 11, and is matched with a T-shaped groove 23 arranged at the bottom in the shell 2, the T-shaped groove 23 plays a supporting role on the connecting rod 12, so that the connecting rod 12 can slide in the T-shaped groove 23 stably without transverse displacement, the connecting rod 12 drives the claw-shaped structure 11 to stretch outwards and shrink inwards to fix, the reduction of the patella fracture is completed, the patella fracture reduction device is also applicable to patellas different sizes, and the applicability is wider;

the upper part of one end of the connecting rod 12 far away from the claw-shaped structure 11 is provided with a cylindrical sliding block 122, the sliding block 122 is matched with a central symmetrical arc-shaped through slot 411 arranged on the disc 41, the arc-shaped through slot 411 is arranged from the vicinity of the center of the disc 41 to the position close to the edge, when the disc 41 rotates, the sliding block 122 slides in the arc-shaped through slot 411 to drive the connecting rod 12 to slide along the T-shaped groove 23, the disc 41 is arranged in the shell 2, the process of the disc 41 rotating to drive the connecting rod 12 to slide is prevented from being disturbed, the knob 42 is arranged above the shell 2, the knob 42 is provided with a third opening 422, a rotating shaft 421 integrally formed with the knob 42 penetrates through a second opening 22 at the top of the shell 2 and is fixedly connected with the center of the disc 41, the rotating knob 42 can drive the disc 41 to rotate, the surface of the second opening 22 is provided with a plurality of equidistant annular grooves, the surface of the rotating shaft 421 contacted with the second opening 22 is provided with an annular bulge matched with the annular groove, so that the phenomenon that the rotating shaft 421 drives the disc 41 to displace in the vertical direction to cause shaking of the clamping piece 1 is avoided, when the clamping piece 1 is contracted to a proper position, the hand screw rod 51 passes through the second opening 22 on the knob 42 and abuts against the surface of the shell 2, the rotation of the knob 42 is limited, the disc 41 is limited to rotate, the clamping piece 1 is limited to extend outwards, the situation that the contraction and the pressurization of the clamping piece 1 on the patella fracture are damaged, the error of the nail channel direction determined by the guide 3 fixedly connected to the claw-shaped structure 11 is caused, and the position is poor when the patella fracture is fixed by the follow-up hollow pressurizing screw through the second through hole 31 of the guide 3;

the adjacent side surfaces of the two adjacent claw structures 11 are fixedly connected with the two guides 3 respectively, the nail way direction can be determined while the nail way direction is reset, the hollow pressurizing screw is fixed through the guides 3, the fixing position of the hollow pressurizing screw is reduced, the risk of the hollow pressurizing screw entering the joint surface is reduced, the part, fixedly connected with the claw structures 11, of the guides 3 is an arc-shaped structure far away from the shell 2, the contraction fixation of the claw structures 11 on the patella fracture is not blocked due to the fact that the positions of the guides 3 and the patella are improper, the surface plane of the part, far away from the claw structures 11, of the guides 3 is perpendicular to the shortest line from the surface plane to the central shaft of the shell 2, of the guides 3 is provided with a second through hole 31, the nail way direction is determined, the hollow pressurizing screw fixes the patella fracture through the second through hole 31 of the guides 3, and the risk of the poor fixing position of the hollow pressurizing screw even entering the joint surface is reduced;

working principle: when the patella fracture is reduced and fixed, the knob 42 is rotated anticlockwise, the disc 41 is driven to rotate anticlockwise, the clamping piece 1 is driven to extend outwards until the patella can be wrapped, the arc bottom surface of the shell 2 is close to the patella imbedding device, the knob 42 is rotated clockwise to enable the claw-shaped structure 11 to shrink and fix the fracture under pressure, then the hand screw is rotated to penetrate through the second opening 22 on the knob 42 and further rotate to be abutted against the surface of the shell 2, the knob 42 is limited, the expansion and contraction of the clamping piece 1 is limited, the reduction of the patella fracture is completed until the direction of a nail channel is determined by the second through hole 31 on the guide 3 fixedly connected with the claw-shaped structure 11 at the lower end, the hollow pressurizing screw is placed in, the steel wire fracture is fixed through the first through hole 111 on the claw-shaped structure 11, the specific operation is to drill along the first through hole 111 on the right side of the first claw-shaped structure 11, penetrate the steel wire into the patella through the drill, then penetrate the steel wire from the first through hole 111 on the right side of the claw-shaped structure 11 sequentially in the clockwise direction and penetrate the patella from the first through hole 111 on the left side of the claw-shaped structure 11, penetrate the steel wire from the first through hole 111 on the left side of the first claw-shaped structure 11 after one circle, screw the two ends of the steel wire and remove the redundant part, thus completing the fixation of the patella fracture, rotate the hand screw 51 out of the second opening 22 on the knob 42 after the fixation is completed, remove the limit of the knob 42, rotate the knob 42 anticlockwise to enable the clamping piece 1 to be stretched to a device which can be removed from the upper part of the patella, take out the device, and complete the whole operation.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the scope of the claims of the present utility model.

Claims

1. The utility model provides a patella fracture reduction and auxiliary fixation device, its characterized in that, but including casing (2), director (3), adjustment mechanism (4), locating part (5) and a plurality of clamping piece (1), clamping piece (1) and casing (2) sliding connection, part clamping piece (1) and director (3) one-to-one fixed connection, adjustment mechanism (4) and clamping piece (1) connecting portion set up inside casing (2), adjustment mechanism (4) and casing (2) rotatable coupling, adjustment mechanism (4) are connected and drive clamping piece (1) to casing (2) internal contraction or to casing (2) external extension with clamping piece (1), and locating part (5) can dismantle with adjustment mechanism (4) and casing (2) when clamping piece (1) shrink to suitable position.

2. The patella fracture reduction and auxiliary fixing device according to claim 1, wherein the clamping piece (1) is arranged around the shell (2), the clamping piece (1) is divided into two groups, the two groups of clamping pieces (1) are symmetrically arranged along the central plane of the shell (2), the clamping piece (1) comprises a claw-shaped structure (11) and a connecting rod (12), the claw-shaped structure (11) faces the shell (2), a plurality of communicated first through holes (111) are formed in the claw-shaped structure (11), one end of the connecting rod (12) is fixedly connected with the upper end of the claw-shaped structure (11), the other end of the connecting rod is slidably connected with the shell (2), a T-shaped sliding strip (121) is arranged below one section of the connecting rod (12) away from the claw-shaped structure (11), and a cylindrical sliding block (122) is arranged above one end of the connecting rod (12) away from the claw-shaped structure (11).

3. The patellar fracture reduction and auxiliary fixing device according to claim 2, wherein the side wall of the casing (2) is provided with first openings (21) for the connecting rods (12) to enter and exit, the number of the first openings (21) is the same as that of the clamping pieces (1), the top of the casing (2) is provided with second openings (22) which are matched with the adjusting mechanism (4), the surface of the second openings (22) is provided with a plurality of equidistant annular grooves, the bottom in the casing (2) is provided with a 'T' -shaped groove (23) which is matched with a 'T' -shaped slide bar (121), and the outer bottom surface of the casing (2) is a cambered surface.

4. The patellar fracture reduction and auxiliary fixation device according to claim 2, wherein the guide (3) is fixedly connected with the side surface of the claw-shaped structure (11), a section of the guide (3) fixedly connected with the claw-shaped structure (11) is an arc-shaped structure far away from the shell (2), a surface plane of a section of the guide (3) far away from the claw-shaped structure (11) is perpendicular to a shortest line segment from the surface plane to a central shaft of the shell (2), and a section of the guide (3) far away from the claw-shaped structure (11) is provided with a second through hole (31).

5. A patellar fracture reduction and auxiliary fixation device according to claim 3, wherein the adjusting mechanism (4) comprises a disc (41) and a knob (42), the disc (41) is arranged inside the shell (2), the disc (41) is provided with an arc through slot (411) from the vicinity of the center to the position close to the edge, the arc through slot (411) is matched with the sliding block (122) of the connecting rod (12), the knob (42) is arranged above the shell, the knob (42) is provided with a third opening (422), the surface of the third opening (422) is provided with threads, a rotating shaft (421) integrally formed with the knob (42) penetrates through the second opening (22) at the top of the shell (2) and is fixedly connected with the center of the disc (41), and the surface of the rotating shaft (421) contacted with the second opening (22) is provided with an annular bulge matched with the annular groove.

6. The patellar fracture reduction and auxiliary fixation device according to claim 5, wherein the limiting member (5) is a hand screw (51), and the hand screw (51) passes through the third opening (422) and abuts against the surface of the housing (2) when the clamping member (1) is retracted to the proper position.