CN110432960B

CN110432960B - A jacker for reducing collapsed fracture fragments

Info

Publication number: CN110432960B
Application number: CN201910654343.2A
Authority: CN
Inventors: 陈春; 陈雷; 林垂聪; 吴存造
Original assignee: First Affiliated Hospital of Wenzhou Medical University
Current assignee: First Affiliated Hospital of Wenzhou Medical University
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2021-07-13
Anticipated expiration: 2039-07-19
Also published as: CN110432960A

Abstract

The invention discloses a jacking device for resetting a collapsed fracture fragment. The main point of the technical solution is that it includes an ejector rod body and a positioning device, the end of the ejector rod body is provided with a first magnet, and the positioning device includes a A second magnet that attracts each other, and a pointing laser light disposed on the second magnet that can irradiate a laser corresponding to the position of the first magnet, and a steering mounting bracket for mounting the second magnet on it, turning the The mounting frame includes a mounting ring for installing the second magnet, and a turret that is axially rotatably connected to the mounting ring. The mounting ring is arranged in a circular structure, the second magnet is axially rotatably connected in the mounting ring, and the turret is formed as a C. The zigzag structure is arranged, the mounting ring is axially rotatably connected to the opening of the turret, the rotational axis of the second magnet in the mounting ring is perpendicular to the rotational axis of the mounting ring on the turret, and the jack can overcome the unclear Disadvantage of the position of the ejector bar when the platform is reset.

Description

A jack-up ware for restoring to throne fracture piece that sinks

Technical Field

The invention relates to the technical field of medical instruments, in particular to a jacking device for resetting a collapsed fracture block.

Background

High violence injury easily causes the fracture of tibial plateau collapse, and poor reduction easily causes the line of force unstable to arouse traumatic arthritis, bring huge misery to the patient. In order to solve the problem of collapse fracture of the tibial plateau, in the operation process, an operator needs to perform 'windowing' (removing partial cortex by using a bone knife) on a tibial diaphysis part under the tibial plateau, then inserts a jacking rod below the tibial plateau, jacks up the collapsed articular cartilage, and then implants bones for fixation.

However, the above-described surgical repair of a collapsed region of the tibial plateau suffers from the following disadvantages: although the surgeon can look directly at the tibial plateau to see the collapsed position, the mandril cannot be guaranteed to be inserted into the medullary cavity and just below the collapsed fracture, so that the operation cannot achieve the expected effect.

Disclosure of Invention

In view of the deficiencies of the prior art, it is an object of the present invention to provide a jack for repositioning a collapsed fracture block that overcomes the disadvantage of not knowing the position of the jack rod when the platform is repositioned.

In order to achieve the purpose, the invention provides the following technical scheme: a jack for resetting a collapsed fracture block comprises a jack body and a positioning device for detecting and positioning the end position of the jack body, wherein the end part of the jack body, which is used for extending into a marrow cavity, is internally provided with a first magnet, the positioning device comprises a second magnet capable of attracting the first magnet, a finger position laser lamp and a steering mounting frame, the finger position laser lamp is arranged on the second magnet and can irradiate laser corresponding to the position of the first magnet, the steering mounting frame is used for mounting the second magnet on the second magnet, the finger position laser lamp is positioned in the middle of the end surface of the second magnet facing the first magnet, the steering mounting frame comprises a mounting ring for mounting the second magnet and a rotating frame axially and rotatably connected with the mounting ring, the mounting ring is arranged in a circular ring structure, the second magnet is axially and rotatably connected in the mounting ring, and the rotating frame is arranged in a C-shaped structure, the mounting ring is axially and rotatably connected to an opening of the rotating frame, the rotating axial direction of the second magnet in the mounting ring is perpendicular to the rotating axial direction of the mounting ring on the rotating frame, and the second magnet can be driven to rotate in the mounting ring and/or the mounting ring on the rotating frame until the second magnet is attracted to the first magnet in the process of approaching the first magnet.

The invention is further configured to: the relative both sides of second magnet all are provided with the axis of rotation of being connected with the rotation of installation ring, and second magnet passes through the axis of rotation of axis of rotation and connects in the installation ring, the relative both sides of installation ring also all are provided with the axis of rotation of being connected with the rotating turret rotation, and the installation ring is connected through the axis of rotation of axis of rotation on the rotating turret, be provided with the locating part that is used for restricting the axis of rotation to produce the axial float in the axis of rotation, the locating part is contradicted on the inside and outside wall of installation ring and rotating turret.

The invention is further configured to: the second magnet rotates the mount pad of being connected including with the mount pad, second magnet fixed mounting is on the mount pad, axis of rotation and mount pad fixed connection, second magnet pass through the axis of rotation on the mount pad and rotate with the mount pad and be connected.

The invention is further configured to: the steering mount is made of a non-magnetic material.

The invention is further configured to: all the cover is equipped with the bearing in the axis of rotation, the inner circle fixed connection of bearing is in the axis of rotation, all be provided with the installation through-hole that is used for supplying the outer lane embedding of bearing on installation circle and the rotating turret, the external diameter of locating part is greater than the external diameter of bearing.

The invention is further configured to: the bearing is a plastic bearing.

The invention is further configured to: the excellent body of top is including the festival stick of a plurality of head and tail ends butt in proper order and the top that is located excellent body top and with top fixed connection at the fastening rope and be located excellent body tail end and be used for the fastener of fixed fastening rope, the curved surface structure setting of indent is become to the one end of festival excellent length direction, and the other end is the curved surface structure setting of evagination, the radian size looks adaptation of festival excellent both ends curved surface, the coaxial connect the through-hole who is used for supplying the fastening rope to pass that is provided with of festival excellent, connect the through-hole and run through the both ends curved surface setting of festival excellent.

The invention is further configured to: the fastening device comprises a fastening handle fixedly connected to the tail end of the ejector rod body and a fastening nut screwed on the fastening handle, and the fastening rope penetrates through one end of the fastening handle and is connected with the fastening nut.

In conclusion, the invention has the following beneficial effects: in the process of the tibial plateau collapse fracture surgery, an operator firstly windows the tibial diaphysis part under the tibial plateau (removes partial cortex by using a scalper), then the ejector rod body extends into the marrow cavity from the open window to the lower part of the tibial plateau, the second magnet can gradually approach the first magnet by moving the steering mounting frame until the second magnet and the first magnet can attract each other, the second magnet is attracted by the first magnet to drive the second magnet to rotate in the mounting ring and/or the mounting ring on the rotating frame, thereby make the finger position laser lamp of setting on the second magnet terminal surface can fall on the tibial plateau through shining light and guide the position that first magnet corresponds, also be the tip position that the ejector pin body stretched into the marrow intracavity, make things convenient for the operation person through ejector pin body jack-up articular cartilage that sinks, then the bone grafting is fixed until accomplishing the operation.

In the above scheme, under the effect that second magnet and first magnet can attract each other, make this end of body of ejector pin correspond the position that tibial plateau located through the light sign that shines out to indicate position laser lamp, make the fracture face that the jack-up that the ejector pin body can be accurate collapsed not influence other normal articular surfaces again to operative effect has effectively been improved.

Drawings

FIG. 1 is a cross-sectional view of a mandrel body;

FIG. 2 is a schematic perspective view of the positioning device;

fig. 3 is a schematic view of the structure of the steering mount.

Reference numerals: 1. a knock-out pin body; 11. ejecting the head; 111. a first magnet; 12. rod saving; 121. a connecting through hole; 13. fastening the rope; 14. a fastening device; 141. fastening a handle; 142. fastening a nut; 2. a positioning device; 21. a second magnet; 22. a finger position laser lamp; 23. a steering mounting bracket; 231. installing a ring; 232. a rotating frame; 233. a mounting seat; 234. a rotation shaft; 235. and a limiting member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1-3, a jack for restoring a collapsed fracture comprises a jack body 1, a positioning device 2 for detecting and positioning the end position of the jack body 1, a first magnet 111 disposed in the end of the jack body 1 extending into the medullary cavity, the positioning device 2 comprising a second magnet 21 capable of attracting the first magnet 111, a finger laser lamp 22 disposed on the second magnet 21 and capable of emitting laser corresponding to the position of the first magnet 111, and a steering mounting frame 23 for mounting the second magnet 21 thereon, the finger laser lamp 22 being disposed on the second magnet 21 and facing the middle of the end surface of the first magnet 111, the steering mounting frame 23 comprising a mounting ring 231 for mounting the second magnet 21 and a rotating frame 232 axially and rotatably connected with the mounting ring 231, the mounting ring 231 being in a circular structure, the second magnet 21 is axially and rotatably connected in the mounting ring 231, the rotating frame 232 is arranged in a C-shaped structure, the mounting ring 231 is axially and rotatably connected at an opening of the rotating frame 232, the rotating axial direction of the second magnet 21 in the mounting ring 231 is perpendicular to the rotating axial direction of the mounting ring 231 on the rotating frame 232, and the second magnet 21 can be driven to rotate in the mounting ring 231 and/or the mounting ring 231 on the rotating frame 232 until the second magnet 21 is attracted to the first magnet 111 in the process that the second magnet 21 approaches the first magnet 111.

In the process of the tibial plateau collapse fracture surgery, an operator firstly windows a tibial backbone part under a tibial plateau (removes partial cortex by using a osteotome), then extends the ejector rod body 1 into the medullary cavity from the windowed part to the lower part of the tibial plateau, and enables the second magnet 21 to gradually approach the first magnet 111 by moving the steering mounting frame 23 until the second magnet 21 and the first magnet 111 can attract each other, the second magnet 21 can drive the second magnet 21 to rotate in the mounting ring 231 and/or the mounting ring 231 on the rotating frame 232 by the attraction of the first magnet 111, so that the finger position laser lamp 22 arranged on the end surface of the second magnet 21 can fall on the position corresponding to the first magnet 111 on the tibial plateau through irradiating light, namely the end position of the ejector rod body 1 extending into the medullary cavity, thereby facilitating the operator to jack up the collapsed articular cartilage through the ejector rod body 1, then bone grafting and fixing are carried out until the operation is completed.

In the above scheme, under the effect that second magnet 21 and first magnet 111 can attract each other, make finger position laser lamp 22 can mark the position that the corresponding tibial plateau of the tip of excellent body 1 department through the light that shines, make the fracture face that the jack-up that the tip of excellent body 1 can be accurate sinks, do not influence other normal articular surfaces again to operative effect has effectively been improved.

The two opposite sides of the second magnet 21 are provided with rotating shafts 234 rotatably connected with the mounting ring 231, the second magnet 21 is axially rotatably connected in the mounting ring 231 through the rotating shafts 234, the two opposite sides of the mounting ring 231 are also provided with rotating shafts 234 rotatably connected with the rotating frame 232, the mounting ring 231 is axially rotatably connected on the rotating frame 232 through the rotating shafts 234, the rotating shafts 234 are provided with limiting parts 235 for limiting the rotating shafts 234 to axially move, and the limiting parts 235 abut against the inner and outer side walls of the mounting ring 231 and the rotating frame 232. The rotation connection between each component is realized through the setting of rotation shaft 234, the structure is simple and easy to realize, and the structure that is provided with locating part 235 and makes the rotation connection is more stable, avoids producing axial float between each component and each component produces the collision in the use, influences the accuracy of guiding of pointing laser lamp 22.

The second magnet 21 includes a mounting seat 233 rotatably connected to the mounting ring 231, the second magnet 21 is fixedly mounted on the mounting seat 233, the rotation shaft 234 is fixedly connected to the mounting seat 233, and the second magnet 21 is rotatably connected to the mounting ring 231 through the rotation shaft 234 on the mounting seat 233. The second magnet 21 and the mounting ring 231 are rotatably connected through the mounting seat 233, and the structure is simple and easy to implement.

The steering mount 23 is made of a non-magnetic material. Such as plastic, the second magnet 21 is prevented from being attracted by the steering mount 23 and affecting the accuracy of the positioning of the first magnet 111.

All the cover is equipped with the bearing on the axis of rotation 234, and the inner circle fixed connection of bearing all is provided with the installation through-hole that is used for supplying the outer lane embedding of bearing on installation circle 231 and the rotating turret 232 on the axis of rotation 234, and the external diameter size of locating part 235 is greater than the external diameter size of bearing. The bearing arrangement improves the flexible degree of rotation at the rotation shaft 234, facilitates the rotation of the mounting ring 231 and the mounting seat 233, and further facilitates the improvement of the accuracy of the pointing of the pointer laser lamp 22 to the end of the ejector rod body 1.

The bearing is a plastic bearing. Plastic bearings are well known in the art and can be of conventional design to avoid the second magnet 21 being attracted by the bearing and affecting the accuracy of the positioning of the first magnet 111.

The excellent body 1 of top is including the festival stick 12 of a plurality of head and tail ends butt in proper order, and be located the top 11 on 1 top of top stick body, and with top 11 fixed connection at fastening rope 13, and be located the 1 tail end of top stick body and be used for fixing the fastener 14 of fastening rope 13, the one end of festival stick 12 length direction becomes the arcwall face structure setting of indent, the other end is the arcwall face structure setting of evagination, the radian size looks adaptation of festival stick 12 both ends arcwall face, festival stick 12 coaxial be provided with be used for supplying fastening rope 13 to pass connect the through-hole 121, connect the through-hole 121 and run through the both ends arcwall face setting of festival stick 12. After the fastening device 14 loosens the fastening rope 13, the fastening rope 12 can be rotated, so that the end of each section of the rod 12 can be rotated, the bending direction and the bending angle of the ejector rod body 1 can be adjusted, after the adjustment is completed, the fastening rope 13 can be tensioned and fixed through the fastening device 14, the end of each section of the rod 12 is shaped in the butt joint state, the ejector rod body 1 can be bent into various types to be applied to various surgical environments, and the use flexibility and the application range of the ejector rod body 1 are effectively improved.

And, still can be provided with the cushion that is used for increasing frictional force in the one end of festival stick 12 length direction, this cushion can be made by silica gel, has effectively strengthened the frictional force of tip butt between the festival stick 12, makes the ejector pin body 1 after adjusting fixed can remain stable usage structure in the art, and then is favorable to improving the result of use of ejector pin body 1.

The fastening device 14 includes a fastening handle 141 fixedly connected to the rear end of the top rod body 1, and a fastening nut 142 screwed to the fastening handle 141, and the fastening rope 13 passes through one end of the fastening handle 141 and is connected to the fastening nut 142. The fastening nut 142 can slide along the length direction of the fastening handle 141 in the rotating process of the fastening handle 141, so that the tightness of the fastening rope 13 can be conveniently adjusted and controlled, the structure is simple and easy to implement, the operation is simple and convenient, and the adjustment and the use of an operator are facilitated.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. a jacking device for reducing a collapsed fracture fragment, comprising a jacking rod body (1), characterized in that: the jacking device also includes a positioning device ( 2), a first magnet (111) is provided in the end of the ejector rod body (1) for extending into the medullary cavity, and the positioning device (2) includes a magnet (111) that can attract each other with the first magnet (111). A second magnet (21), a pointing laser lamp (22) arranged on the second magnet (21) and capable of irradiating a laser beam corresponding to the position of the first magnet (111), and a laser light (22) for supplying the second magnet (21) A steering mounting bracket (23) mounted thereon, the pointing laser light (22) is located in the middle of the end face of the second magnet (21) facing the first magnet (111), the steering mounting bracket (23) includes a useful The mounting ring (231) for mounting the second magnet (21) and the turret (232) axially rotatably connected to the mounting ring (231), the mounting ring (231) is arranged in an annular structure, and the first The two magnets (21) are axially rotatably connected in the mounting ring (231), the turret (232) is arranged in a C-shaped structure, and the mounting ring (231) is axially rotatably connected to the opening of the turret (232). , the rotational axis of the second magnet (21) in the mounting ring (231) is perpendicular to the rotational axis of the mounting ring (231) on the turret (232), and the second magnet (21) moves toward the first magnet (111) The second magnet (21) can be driven to rotate in the mounting ring (231) and/or the mounting ring (231) on the turret (232) during the approaching process until the two attract each other;

The ejector body (1) includes a plurality of segment bars (12) whose ends are in contact with each other in sequence, and a plug (11) located at the top of the ejector body (1), and is fixedly connected with the plug (11) on a tightening rope. (13), and a fastening device (14) located at the rear end of the ejector rod body (1) for fixing the fastening rope (13), one end in the length direction of the segment rod (12) has a concave arc surface structure The other end is arranged in a convex arc-shaped surface structure, the arc size of the arc-shaped surfaces at both ends of the segment rod (12) is matched, and the segment rod (12) is coaxially provided with a fastening rope ( 13) A connecting through hole (121) passing through, the connecting through hole (121) is provided through the arc-shaped surfaces of both ends of the segment rod (12).

2. A jacker for reducing a collapsed bone fragment according to claim 1, wherein the second magnet (21) is provided with a rotatable connection to the mounting ring (231) on opposite sides of the second magnet (21). The rotation shaft (234), the second magnet (21) is axially rotatably connected in the installation ring (231) through the rotation shaft (234), and opposite sides of the installation ring (231) are also provided with the turret (232). ) rotatably connected rotation shaft (234), the mounting ring (231) is axially rotatably connected on the turret (232) through the rotation shaft (234), and the rotation shaft (234) is provided with a rotation shaft (234) for limiting the rotation A limiter (235) for axial movement is generated, and the limiter (235) abuts against the mounting ring (231) and the inner and outer side walls of the turret (232).

3. A jacking device for reducing a collapsed bone fragment according to claim 2, wherein the second magnet (21) comprises a mounting seat (233) rotatably connected with the mounting ring (231) , the second magnet (21) is fixedly mounted on the mounting seat (233), the rotation axis (234) is fixedly connected with the mounting seat (233), and the second magnet (21) rotates through the mounting seat (233) The shaft (234) is rotatably connected with the mounting ring (231).

4. A jack for reducing a collapsed bone fragment according to any one of claims 1-3, wherein the steering mounting frame (23) is made of non-magnetic material.

5. A jacking device for resetting a collapsed bone fragment according to claim 2 or 3, wherein a bearing is sleeved on the rotation shaft (234), and the inner ring of the bearing is fixedly connected On the rotation shaft (234), the mounting ring (231) and the turret (232) are both provided with mounting through holes for embedding the outer ring of the bearing, and the outer diameter of the stopper (235) is larger than The outer diameter of the bearing.

6 . The jacker for reducing collapsed fracture fragments according to claim 5 , wherein the bearing is a plastic bearing. 7 .

7. A jacker for reducing a collapsed fracture fragment according to claim 1, wherein the fastening device (14) comprises a fastening handle fixedly connected to the rear end of the ejector rod body (1) (141), and a tightening nut (142) screwed on the tightening handle (141), the tightening rope (13) is connected to the tightening nut (142) through one end of the tightening handle (141).