Unicondylar arthroplasty tibia vertical osteotomy auxiliary device

Abstract

The utility model discloses a tibia vertical osteotomy auxiliary device for unicompartmental knee arthroplasty, and relates to the technical field of unicompartmental knee arthroplasty. The device comprises a base, a stand column, a machine box, a winding shaft, an inhaul cable and a drag hook, a fixing area is arranged in the middle of the base, the stand column is arranged at the upper end of the base, the machine box is arranged above the stand column, and a small self-locking motor is fixed in the machine box. According to the utility model, the inhaul cable and the drag hook are locked through the small self-locking motor, the winding disc, the motor driver and the touch screen, so that medical personnel can adjust the degree of tightness of traction according to the number of turns of winding of the winding disc as required, and an assistant can carry out long-time bare-handed traction; secondly, the two extendable extension rods and the corresponding drag hooks are mounted on the mounting seat, so that the medical staff can adjust the distance between the two drag hooks according to the exposure requirement of the surgical incision, the surgical exposure area is expanded, and a doctor can conveniently perform an operation.

Description

TECHNICAL FIELD

[0001] The utility model belongs to single condyle replacement operation field, concretely relates to a single condyle replacement tibia vertical bone cutting auxiliary device. BACKGROUND

[0002] Single condyle knee arthroplasty is an effective means for treating medial knee osteoarthritis, and has the advantages of small trauma, less surgical blood loss, fewer complications, faster recovery, etc. compared with total knee arthroplasty, but the requirements for surgical technique, position and angle of femoral and tibial prosthesis placement are higher, and tibial osteotomy is an important link of single condyle knee arthroplasty.

[0003] When tibial osteotomy is needed, an assistant needs to use a retractor to pull the surgical incision site to expose the surgical area for the doctor to operate, and the long-time pulling requires higher arm strength and stability of the assistant, and secondly, multiple retractors need to be used to expose the surgical field, for example, when four retractors are needed, at least two assistants are needed to pull, and when there are too many people in the surgical area, it may affect the operation of the main surgeon, and therefore the utility model is proposed. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a single condyle replacement tibia vertical bone cutting auxiliary device.

[0005] To solve the above technical problems, the basic idea of the technical scheme of the utility model is:

[0006] A single condyle replacement tibia vertical bone cutting auxiliary device, comprising a base, a stand, a machine case, a winding shaft, a cable and a retractor, a fixed area is arranged in the middle of the base, a stand is arranged at the upper end of the base, a machine case is arranged above the stand, a small self-locking motor is fixed in the machine case, a winding disc for fixing the cable is fixed to the output shaft of the small self-locking motor, and a fixed head threadedly connected with a sleeve block is fixedly installed at one end of the cable;

[0007] A mounting seat is installed at one side of the valley of the sleeve block, a gap hole for pulling the extension rod is formed on both sides of the mounting seat, a guide groove matched with the guide column in the mounting seat is formed in the middle of the two extension rods, tooth blocks matched with the transmission gears are distributed at equal intervals on the opposite surfaces of the two extension rods, a threaded groove for screwing in the screw column is formed at the end of the two extension rods, and the side ends of the two screw columns are fixed with the retractor;

[0008] A spring bolt is installed on one side of the mounting seat, the pin head of the spring bolt abuts against the alignment hole, and the positioning hole is arranged at equal intervals on the side of one of the extension rods.

[0009] Optionally, the side of the fixing area is fixed with a guide rail for installing a guide block, the side of the guide block is fixed with a pressing plate, the bottom of the pressing plate is rotatably connected with the end of a positioning bolt through a bearing, and the positioning bolt is threadedly connected with the lower end of the base.

[0010] Optionally, the opposite surfaces of the pressing plate and the base are both fixed with a plurality of anti-skid protrusions, and the upper end of each anti-skid protrusion is provided with a clamping groove for installing a rubber strip.

[0011] Optionally, the inside of the stand is provided with a cavity for installing an electric push rod, the telescopic end of the electric push rod penetrates through the stand and is fixedly connected with the bottom of the case, and a dustproof organ case is fixed between the case and the stand.

[0012] Optionally, the small self-locking motor is connected with the motor driver circuit through wires, and the motor driver is connected with the touch screen at the top of the case through wires.

[0013] Optionally, the middle of the winding plate is fixed with a thimble for inserting the end of the cable, and a limiting bolt for fixing the cable is threadedly connected with the front end of the thimble.

[0014] Optionally, the side of the case is provided with an extension end for threadedly connecting a guide pipe, and a guide shaft for guiding the cable is symmetrically arranged in the inside of the extension end and the guide pipe.

[0015] After the above technical scheme is adopted, the present application has the following advantages compared with the prior art, of course, any product implementing the present application does not necessarily need to achieve all the advantages described below:

[0016] 1. The small self-locking motor, the winding disc, the motor driver and the touch screen of the present application play a locking role on the cable and the hook, so that medical staff can adjust the tightness of the pulling by winding the number of turns of the winding disc, thereby assisting the long-time manual pulling. In addition, in order to expose the surgical field, multiple hooks are needed for traction, for example, when four hooks are needed for traction, at least two assistants are needed for traction. When there are too many people in the surgical area, the operation of the main surgeon is affected. The present application installs two extendable extension rods and corresponding hooks on one mounting seat, so that medical staff can adjust the distance between the two hooks according to the exposure needs of the surgical incision, thereby expanding the surgical exposure area to facilitate the operation of the doctor.

[0017] 2. The present application considers the disinfection of surgical instruments that come into contact with patients, and adopts a threaded connection between the hook and the extension rod, which facilitates subsequent disinfection of medical staff.

[0018] 3, The utility model discloses a height of the device can be adjusted through the electric push rod telescopic end to adjust the use height of the machine case, thereby adjusting the use height of the drag hook.

[0019] The specific embodiments of the utility model will be described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings in the following description are only some embodiments, and other drawings can be obtained according to these drawings without the creative labor of the ordinary skilled in the art. In the drawings:

[0021] Figure 1 It is the main view cross section structure schematic drawing of the utility model;

[0022] Figure 2 It is the part structure appearance schematic drawing of the drag hook in the utility model;

[0023] Figure 3 It is the combined part structure schematic drawing of the drag cable, fixed head, cover block, mounting seat and drag hook in the utility model;

[0024] Figure 4 It is the combined part structure diagram of the guide pipe and guide shaft in the utility model;

[0025] Figure 5 It is the part structure schematic drawing of A part in Figure 1 ;

[0026] Figure 6 It is the part structure schematic drawing of B part in Figure 1 ;

[0027] Figure 7 It is the part structure schematic drawing of C part in Figure 1 ;

[0028] Figure 8 It is the part structure schematic drawing of D part in Figure 3 ;

[0029] Figure 9 It is the part structure schematic drawing of E part in Figure 3 .

[0030] In the drawings, the component list represented by each sign is as follows:

[0031] 1, base; 2, stand; 3, machine case; 4, small self-locking motor; 5, cable; 6, winding disc; 7, fixed head; 8, sleeve block; 9, mounting seat; 10, extension rod; 11, guide column; 12, transmission gear; 13, tooth block; 14, stud; 15, pull hook; 16, spring bolt; 17, alignment hole; 18, guide block; 19, guide rail; 20, pressing plate; 21, positioning bolt; 22, anti-skid convex strip; 23, rubber strip; 24, electric push rod; 25, dust organ case; 26, motor driver; 27, touch screen; 28, sleeve ring; 29, limiting bolt; 30, guide pipe; 31, extension end; 32, guide shaft.

[0032] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the utility model in any way, but to illustrate the concept of the utility model to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0033] The utility model will be further described in detail in combination with the drawings.

[0034] Please refer to Figures 1 to 9 The utility model provides a technical scheme: a single condyle replacement tibial vertical osteotomy auxiliary device, including base 1, stand 2, machine case 3, winding shaft, cable 5 and pull hook 15, the middle part of base 1 is equipped with fixed area, is equipped with stand 2 on the upper end of base 1, is equipped with machine case 3 in the upper of stand 2, the inside fixed small self-locking motor 4 of machine case 3, the output shaft of small self-locking motor 4 is fixed with the winding disc 6 of cable 5 fixed, and the fixed head 7 of one end fixed installation of cable 5 is connected with sleeve block 8 screw thread;

[0035] The installation seat 9 is installed on the side valley bottom of sleeve block 8, and the accommodation hole for the extension rod 10 is formed on both sides of the installation seat 9, the guide groove that is adapted to the guide column 11 in the installation seat 9 is formed in the middle part of the two extension rods 10, the tooth block 13 that is engaged with transmission gear 12 is distributed at equal intervals on the opposite surface of the two extension rods 10, the threaded groove for the stud 14 is formed on the end of the two extension rods 10, and the side end of the two studs 14 is fixed with pull hook 15 respectively;

[0036] The side of the mounting base 9 is provided with a spring latch 16, and the pin head of the spring latch 16 is in abutment with a positioning hole 17. The positioning hole is equidistantly arranged on the side of one of the extension rods 10. Firstly, the assistant needs to use the drag hook 15 to pull the surgical incision position to expose the surgical area for the doctor to operate when the tibia is cut. In the case that the long-time pulling requires higher arm strength and stability of the assistant, the small self-locking motor 4, the winding disc 6, the motor driver 26 and the touch screen 27 are used to lock the pull cable 5 and the drag hook 15, so that the medical staff can adjust the tightness of the pulling by winding the number of turns of the winding disc 6 according to the need, thereby the assistant can pull for a long time without hands. Secondly, in order to expose the surgical field, multiple drag hooks 15 need to be used for traction. For example, when four drag hooks 15 are needed for traction, at least two assistants are needed to pull. When there are too many people in the surgical area, the operation of the main doctor is affected. The mounting base 9 is provided with two extension rods 10 that can be stretched and the corresponding drag hooks 15, so that the medical staff can adjust the distance between the two drag hooks 15 according to the exposure needs of the surgical incision, thereby expanding the surgical exposure area to facilitate the operation of the doctor. When adjusting, the other extension rod 10 is opened synchronously through the transmission of the transmission gear 12, the synchronous approach or synchronous trend movement is completed, and the spring latch 16 is released after the adjustment is completed, so that the pin head of the spring latch 16 is in abutment with the inside of the positioning hole to complete the positioning.

[0037] The side of the fixed area is fixed with a guide rail 19 for mounting the guide block 18. The side of the guide block 18 is fixed with a pressing plate 20. The bottom of the pressing plate 20 is rotatably connected with the end of the positioning bolt 21 through a bearing, and the positioning bolt 21 is screw-connected with the lower end of the base 1. The base 1, the pressing plate 20 and the positioning bolt 21 are matched with each other, so that the device can be fixed on the surgical bed or any plate-shaped fixed object in the surgical area. When fixed, the positioning bolt 21 is tightened, so that the pressing plate 20 is guided or jacked up by the guide block 18 and the guide rail 19, thereby abutting with the fixed object to complete the fixing.

[0038] The opposite surfaces of the pressing plate 20 and the base 1 are fixed with a plurality of anti-skid protrusions 22. The upper end of each anti-skid protrusion 22 is provided with a clamping groove for mounting the rubber strip 23. The anti-skid protrusions 22 are matched with the rubber to increase the friction between the pressing plate 20 and the surface of the fixed object, thereby improving the stability of the device when fixed.

[0039] The inside of the stand column 2 is provided with a cavity for installing the electric push rod 24, the telescopic end of the electric push rod 24 penetrates through the stand column 2 and is fixedly connected with the bottom of the case 3, and the dustproof organ case 25 is fixed between the case 3 and the stand column 2; considering that the lower limbs of the patient need to be bent to the bending position required in the operation, the height of traction needs to be adjusted, at this time, the device can adjust the use height of the case 3 through the telescopic end of the electric push rod 24, so as to adjust the use height of the pull hook 15.

[0040] The small self-locking motor 4 is connected with the motor driver 26 through wires, the motor driver 26 is connected with the touch screen 27 at the top of the case 3 through wires, and the touch screen 27 and the motor driver 26 are arranged, so that the user can conveniently control the number of rotations of the small self-locking motor 4.

[0041] The middle part of the winding plate is fixedly provided with a sleeve ring 28 for inserting the end of the cable 5, and the front end of the sleeve ring 28 is threadedly connected with a limiting bolt 29 for fixing the cable 5.

[0042] The side of the case 3 is provided with an extension end 31 for threadedly connecting the guide pipe 30, and the inside of the extension end 31 and the guide pipe 30 is symmetrically provided with a guide shaft 32 for guiding the cable 5.

[0043] The utility model is not limited to the above-mentioned embodiment, any person should know that the structural change made under the inspiration of the utility model, any technical scheme with the same or similar technical scheme of the utility model falls into the protection scope of the utility model. The utility model is not described in detail, and the technical, shape and structure parts are all known technologies.

Claims

1. A unicompartmental tibial vertical osteotomy auxiliary device, comprising a base (1), a column (2), a housing (3), a winding shaft, a cable (5), and a hook (15), characterized in that, The base (1) has a fixed area in the middle, and a column (2) is provided at the upper end of the base (1). A machine box (3) is provided above the column (2). A small self-locking motor (4) is fixed inside the machine box (3). A winding reel (6) for fixing the cable (5) is fixed on the output shaft of the small self-locking motor (4). A fixing head (7) that is threadedly connected to the sleeve block (8) is fixedly installed at one end of the cable (5). A mounting base (9) is installed on one side of the valley bottom of the sleeve block (8). A clearance hole for the extension rod (10) to be pulled out is provided on both sides of the mounting base (9). A guide groove adapted to the guide post (11) inside the mounting base (9) is provided in the middle of the two extension rods (10). Tooth blocks (13) that mesh with the transmission gear (12) are evenly distributed on the opposite surfaces of the two extension rods (10). A threaded groove for the stud (14) to be screwed into is provided at the end of the two extension rods (10). The side ends of the two studs (14) are fixed to the hook (15) respectively. A spring pin (16) is installed on one side of the mounting base (9). The pin head of the spring pin (16) abuts against the alignment hole (17). The positioning holes are equally spaced on the side of one of the extension rods (10).

2. The unicompartmental tibial vertical osteotomy auxiliary device according to claim 1, characterized in that, The side of the fixed area is fixed with a guide rail (19) for mounting the guide block (18). A pressure plate (20) is fixed on the side of the guide block (18). The bottom of the pressure plate (20) is rotatably connected to the end of the positioning bolt (21) through a bearing. The positioning bolt (21) is threadedly connected to the lower end of the base (1).

3. The unicompartmental tibial vertical osteotomy auxiliary device according to claim 2, characterized in that, The pressure plate (20) and the base (1) are each fixed with a plurality of anti-slip protrusions (22), and each anti-slip protrusion (22) has a slot at the upper end for installing the rubber strip (23).

4. The unicompartmental tibial vertical osteotomy auxiliary device according to claim 1, characterized in that, The column (2) has an internal cavity for installing an electric push rod (24). The telescopic end of the electric push rod (24) passes through the column (2) and is fixedly connected to the bottom of the chassis (3). A dustproof bellows cover (25) is fixed between the chassis (3) and the column (2).

5. The unicompartmental tibial vertical osteotomy auxiliary device according to claim 1, characterized in that, The small self-locking motor (4) is connected to the motor driver (26) circuit via a wire, and the motor driver (26) is connected to the touch screen (27) on the top of the chassis (3) via a wire.

6. The unicompartmental tibial vertical osteotomy auxiliary device according to claim 1, characterized in that, The winding reel is fixed with a collar (28) for inserting the end of the cable (5) into the middle, and a limiting bolt (29) for fixing the cable (5) is threaded to the front end of the collar (28).

7. The unicompartmental tibial vertical osteotomy auxiliary device according to claim 1, characterized in that, The side of the chassis (3) is provided with an extension end (31) for threaded connection of the guide tube (30), and guide shafts (32) for guiding the cable (5) are symmetrically provided inside the extension end (31) and the guide tube (30).

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