Adjustable vertical positioning guider for patella fracture fixation

Abstract

An adjustable vertical positioning guider in patella fracture fixation comprises a forceps body, a kirschner wire guide tube, a positioning rod, a guide ring and a guide needle cylinder, the positioning rod is arranged on one side of the kirschner wire guide tube, the positioning rod is connected with the guide ring, and the guide needle cylinder is connected with the guide ring. The shortest distance from the axis of the guide ring to the kirschner wire guide pipe is equal to the distance from the axis of the guide ring to the top end of the guide ring, the first forceps rod of the forceps body is connected with the kirschner wire guide pipe, the guide needle cylinder is arranged in the guide ring in a penetrating mode, and the outer diameter of the guide needle cylinder is equal to the inner diameter of the guide ring. The Kirschner wire guiding device is provided with the guiding ring perpendicular to the Kirschner wire guiding pipe, the guiding needle cylinder provided with a titanium cable / steel wire in a penetrating mode can be located on the deep face of the Kirschner wire and tightly attached to the patella in the process of penetrating through muscular tissue, the problems that an orthopedist is inaccurate in touch typing and needs multiple times of perspective are solved, and meanwhile the guiding ring can rotate up and down to adjust the direction; and the requirement of multi-angle fixation during the operation of orthopedists can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an adjustable vertical positioning guide for patellar fracture fixation. Background Art

[0002] Patellar fractures occur in the patella at the front of the knee joint. Surgery is the preferred treatment to reduce complications and disability. Kirschner wire tension banding is a classic internal fixation method for patellar fractures, and to date, no other internal fixation method can fully replace it.

[0003] Currently, during surgery, after the Kirschner wire is inserted into the patella, the titanium cable / steel wire must be passed through the deep surface of the Kirschner wire and close to the patella when tying the tension band. Due to obstruction by the quadriceps femoris and patellar ligament, repeated punctures and C-arm fluoroscopy are required to determine the position of the titanium cable / steel wire, which is time-consuming and labor-intensive. Utility Model Content

[0004] In order to solve the defects of the prior art, the utility model provides an adjustable vertical positioning guide for patellar fracture fixation.

[0005] The technical solution adopted by the utility model is: an adjustable vertical positioning guide for patellar fracture fixation, comprising a clamp body, a Kirschner wire guide tube, a positioning rod, a guide ring and a guide needle cylinder, the positioning rod being arranged on one side of the Kirschner wire guide tube, the positioning rod comprising a positioning rod one, a positioning rod two and a positioning rod three, the positioning rod one being vertically connected to the Kirschner wire guide tube, the positioning rod one being perpendicular to the clamp body, the end of the positioning rod one being vertically connected to the positioning rod two, the positioning rod two being parallel to the clamp body, the end of the positioning rod two being vertically connected to the positioning rod three, the positioning rod three being parallel to the Kirschner wire guide tube, the positioning rod three being parallel to the clamp body, the lower end of the Kirschner wire guide tube being provided with a puncture tip, the bottom end of the positioning rod three and the bottom end of the puncture tip being in the same plane, the end of the positioning rod three being connected to the guide ring, the shortest distance from the axis of the guide ring to the Kirschner wire guide tube being equal to the distance from the axis of the guide ring to the top end of the guide ring, the first clamp rod of the clamp body being connected to the Kirschner wire guide tube, the guide needle cylinder being passed through the guide ring, and the outer diameter of the guide needle cylinder being equal to the inner diameter of the guide ring.

[0006] A further improvement to the above scheme is that the pliers body includes a first pliers rod, a second pliers rod, a grip ring, a rotating shaft, a limit rod one and a limit rod two, the second pliers rod is provided with a pliers tip, the first pliers rod and the second pliers rod are rotatably connected by a rotating shaft, the ends of the first pliers rod and the second pliers rod are both provided with grip rings, the limit rod one is provided on the inner side of the first pliers rod, the limit rod two is provided on the inner side of the second pliers rod, a serrated protrusion is provided on the limit rod two, and a groove matching the serrated protrusion is provided on the limit rod one.

[0007] A further improvement to the above scheme is that a connecting hole is provided on the positioning rod three, and the connecting hole is a structure that is wide on the outside and narrow on the inside. A rotating rod is provided on the side of the guide ring, and the rotating rod is a structure that is narrow on the outside and wide on the inside that cooperates with the connecting hole. A limiting buckle is provided at the end of the rotating rod, and the width of the limiting buckle is greater than the inner width of the connecting hole. A space slightly larger than the limiting buckle is provided inside the positioning rod three.

[0008] A further improvement to the above solution is that a needle core is provided in the guide needle cylinder, the needle core has the same length as the inner space of the guide needle cylinder, and the needle core is closely attached to the inner wall of the guide needle cylinder.

[0009] A further improvement to the above solution is that a transverse plate is provided on the guide needle cylinder, a slot is provided on the transverse plate, a push block is provided at the end of the needle core, an insert block is provided on the push block, and the insert block cooperates with the slot.

[0010] A further improvement to the above solution is that a guide channel that is wide on the outside and narrow on the inside is provided in the guide needle cylinder.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] First, a guide ring perpendicular to the Kirschner wire guide tube is provided, which allows the guide needle tube for inserting the titanium cable / steel wire to be located deep inside the Kirschner wire and close to the patella during the process of passing through the muscle tissue, thus avoiding the problem of inaccurate blind insertion by orthopedic surgeons and the need for multiple fluoroscopy.

[0013] Secondly, the guide ring can be rotated up and down to adjust the direction, which can meet the needs of orthopedic surgeons for multi-angle fixation during surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the Kirschner wire guide tube and positioning rod;

[0017] Figure 3 This is the front view of the Kirschner wire guide tube and positioning rod;

[0018] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0019] Figure 5 Schematic diagram of the guide needle cylinder and needle core structure.

[0020] In the figure: 1. Clamp body; 101. First clamp rod; 102. Second clamp rod; 103. Grip ring; 104. Rotating shaft; 105. Limit rod 1; 106. Limit rod 2; 2. Kirschner wire guide tube; 3. Positioning rod; 301. Positioning rod 1; 302. Positioning rod 2; 303. Positioning rod 3; 4. Guide ring; 5. Guide syringe; 6. Puncture tip; 7. Clamp tip; 8. Connecting hole; 9. Rotating rod; 10. Limit buckle; 11. Needle core; 12. Horizontal plate; 13. Slot; 14. Push block; 15. Insert block; 16. Guide channel. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0022] An adjustable positioning vertical guide for patellar fracture fixation includes a clamp body 1, a Kirschner wire guide tube 2, a positioning rod 3, a guide ring 4 and a guide needle 5. The first clamp rod 101 of the clamp body 1 is connected to the Kirschner wire guide tube 2. After the Kirschner wire guide tube is put onto the Kirschner wire, the clamp body 1 is used to clamp the patella, and the tip of the Kirschner wire guide tube 2 is in close contact with the patella. The positioning rod 3 is arranged on one side of the Kirschner wire guide tube 2, and the positioning rod 3 includes a positioning rod 1 301, a positioning rod 2 302 and a positioning rod 3 303. The positioning rod 1 301 is vertically connected to the Kirschner wire guide rod, and the positioning rod 1 301 is perpendicular to the clamp body 1. The end of the positioning rod 1 301 is vertically connected to the positioning rod 2 302, and the positioning rod 2 302 is parallel to the clamp body 1. The end of the positioning rod 2 302 is vertically connected to the positioning rod 3 303, and the positioning rod 3 303 is parallel to the Kirschner wire guide tube 2. The positioning rod 3 303 is parallel to the clamp body 1. The lower end of the Kirschner wire guide tube 2 is provided with a puncture tip 6, and the bottom end of the positioning rod 3 303 is in the same plane as the bottom of the puncture tip 6. The end of the positioning rod 3 303 is connected to the guide ring 4, and the shortest distance from the axis of the guide ring 4 to the Kirschner wire guide tube 2 is equal to the distance from the axis of the guide ring 4 to the top of the guide ring 4. A guide ring 4 is provided, and a guide needle tube 5 can be inserted into the guide ring 4, the needle core is pulled out, and then the titanium cable / steel wire is inserted in the reverse direction from the guide needle tube 5. When the guide needle tube 5 is pulled out, the titanium cable / steel wire is transmitted to the opposite side, and there is no need to blindly hit the titanium cable / steel wire, thereby avoiding directional deviation when inserting the titanium cable / steel wire. The guide ring 4 can be set on one side of the Kirschner wire guide tube 2 by the positioning rod 3, so that it avoids muscle tissue and allows the Kirschner wire guide tube 2 to be smoothly inserted into the patella. The guide needle tube 5 is inserted into the guide ring 4, and the outer diameter of the guide needle tube 5 is equal to the inner diameter of the guide ring 4. The guide needle tube 5 can be placed close to the Kirschner wire guide tube 2 so that the titanium cable / steel wire passed through is close to the deep surface of the Kirschner wire.

[0023] Among them, the clamp body 1 includes a first clamp rod 101, a second clamp rod 102, a gripping ring 103, a rotating shaft 104, a limiting rod 105 and a limiting rod 2 106, the second clamp rod 102 is provided with a clamp tip 7, the first clamp rod 101 and the second clamp rod 102 are rotatably connected by the rotating shaft 104, the ends of the first clamp rod 101 and the second clamp rod 102 are both provided with a gripping ring 103, the limiting rod 105 is arranged on the inner side of the first clamp rod 101, the limiting rod 2 106 is arranged on the inner side of the second clamp rod 102, the limiting rod 2 106 is provided with a serrated protrusion, and the limiting rod 105 is provided with a groove that cooperates with the serrated protrusion. During operation, an orthopedic surgeon can use the clamp body 1 to clamp the patella, and at the same time, the limiting rod 105 and the limiting rod 2 106 cooperate to prevent the clamp rod from retracting and maintain the clamping state of the clamp body 1.

[0024] The third positioning rod 303 is provided with a connection hole 8, which is wide on the outside and narrow on the inside. A rotating rod 9 is provided on the side of the guide ring 4. The rotating rod 9 is narrow on the outside and wide on the inside, which matches the connection hole 8. A limit buckle 10 is provided at the end of the rotating rod 9. The limit buckle 10 is wider than the inside width of the connection hole 8, and a space slightly larger than the limit buckle 10 is provided inside the third positioning rod 303. The provision of the connection hole 8 and the rotating rod 9 allows the guide ring 4 to be adjusted in the vertical direction, meeting the needs of multi-angle fixation.

[0025] Among them, a needle core 11 is provided in the guide needle barrel 5. The needle core 11 has the same length as the internal space of the guide needle barrel 5 and is in close contact with the inner wall of the guide needle barrel 5. The needle core 11 is in close contact with the inner wall of the guide needle barrel 5, which can prevent the muscle tissue from entering the guide needle barrel 5 when the guide needle barrel 5 passes through the muscle tissue.

[0026] The guide needle barrel 5 is provided with a transverse plate 12, which is provided with a slot 13. A push block 14 is provided at the end of the needle core 11, and an inserting block 15 is provided on the push block 14. The inserting block 15 cooperates with the slot 13. When the orthopedic surgeon inserts the needle core 11, the inserting block 15 cooperates with the slot 13, which makes it more convenient and accurate to insert the needle core 11 into the guide needle barrel 5.

[0027] The guide needle barrel 5 is provided with a guide channel 16 which is wide outside and narrow inside, so that the orthopedic surgeon can insert the needle core 11 into the guide needle barrel 5 conveniently.

[0028] Working principle:

[0029] During the operation, after the Kirschner wire has been successfully inserted into the patella, the Kirschner wire guide tube 2 is inserted along the tail of the Kirschner wire, and the forceps tip 7 on the second forceps rod 102 is placed on the place where the Kirschner wire on the opposite side connects to the patella. The first forceps rod 101 and the second forceps rod 102 are pressed by the grip ring 103 so that the puncture tip 6 on the Kirschner wire guide tube 2 is in close contact with the edge of the patella. Subsequently, the forceps rod is fixed using limit rod 105 and limit rod 2 106 to prevent the forceps rod from retracting and maintain the clamping state of the forceps body 1. The forceps body 1 is placed perpendicular to the patellar surface as a whole. The guide needle cylinder 5 is passed through the guide ring 4. At this time, the guide needle cylinder 5 can be rotated to slightly adjust the direction to meet the fixation needs at different angles. Due to the provision of the guide ring 4, it can be ensured that the guide needle cylinder 5 is always inserted into the deep surface of the Kirschner wire and close to the patella, avoiding repeated fluoroscopy during the operation and saving time. Then take out the needle core 11 from the guide needle tube 5, pass the titanium cable / steel wire through the inside of the guide needle tube 5 in reverse, then pull out the guide needle tube 5, pass the titanium cable / steel wire through, and use the titanium cable / steel wire to fix the fractured patella with a tension band.

[0030] In the description of the present invention, it should be noted that, unless otherwise specified, “multiple” means two or more; the terms “upper”, “lower”, “left”, “right”, “inside”, “outside”, “top”, “bottom”, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. After reading the above description, various modifications and alternatives to the present invention will be readily apparent to those skilled in the art. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. An adjustable vertical positioning guide for patellar fracture fixation, characterized by: The invention comprises a clamp body (1), a Kirschner wire guide tube (2), a positioning rod (3), a guide ring (4) and a guide needle cylinder (5), wherein the positioning rod (3) is arranged on one side of the Kirschner wire guide tube (2), and the positioning rod (3) comprises a positioning rod 1 (301), a positioning rod 2 (302) and a positioning rod 3 (303), wherein the positioning rod 1 (301) is vertically connected to the Kirschner wire guide tube (2), the positioning rod 1 (301) is perpendicular to the clamp body (1), the end of the positioning rod 1 (301) is vertically connected to the positioning rod 2 (302), the positioning rod 2 (302) is parallel to the clamp body (1), the end of the positioning rod 2 (302) is vertically connected to the positioning rod 3 (303), and the positioning rod 3 (303) is parallel to the clamp body (1). 03) is parallel to the Kirschner wire guide tube (2), the positioning rod three (303) is parallel to the clamp body (1), the lower end of the Kirschner wire guide tube (2) is provided with a puncture tip (6), the bottom end of the positioning rod three (303) and the bottom of the puncture tip (6) are in the same plane, the end of the positioning rod three (303) is connected to a guide ring (4), the shortest distance from the axis of the guide ring (4) to the Kirschner wire guide tube (2) is equal to the distance from the axis of the guide ring (4) to the top of the guide ring (4), the first clamp rod (101) of the clamp body (1) is connected to the Kirschner wire guide tube (2), the guide needle cylinder (5) is inserted into the guide ring (4), and the outer diameter of the guide needle cylinder (5) is equal to the inner diameter of the guide ring (4).

2. The adjustable vertical positioning guide for patellar fracture fixation according to claim 1, characterized in that: The pliers body (1) comprises a first pliers rod (101), a second pliers rod (102), a gripping ring (103), a rotating shaft (104), a limiting rod (105) and a limiting rod (106); the second pliers rod (102) is provided with a pliers tip (7); the first pliers rod (101) and the second pliers rod (102) are rotatably connected via the rotating shaft (104); the first pliers rod (101) and the second pliers rod (102) are both provided with a gripping ring (103); the limiting rod (105) is provided on the inner side of the first pliers rod (101); the limiting rod (106) is provided on the inner side of the second pliers rod (102); a serrated protrusion is provided on the limiting rod (106); and a groove matching the serrated protrusion is provided on the limiting rod (105).

3. The adjustable vertical positioning guide for patellar fracture fixation according to claim 1, characterized in that: The positioning rod (303) is provided with a connecting hole (8), and the connecting hole (8) is a structure with a wide outside and a narrow inside. The side of the guide ring (4) is provided with a rotating rod (9), and the rotating rod (9) is a structure with a narrow outside end and a wide inside end that matches the connecting hole (8). A limiting buckle (10) is provided at the end of the rotating rod (9), and the width of the limiting buckle (10) is greater than the inner width of the connecting hole (8). A space slightly larger than the limiting buckle (10) is provided in the positioning rod (303).

4. The adjustable vertical positioning guide for patellar fracture fixation according to claim 1, characterized in that: A needle core (11) is provided in the guide needle cylinder (5), the needle core (11) has the same length as the inner space of the guide needle cylinder (5), and the needle core (11) is closely attached to the inner wall of the guide needle cylinder (5).

5. The adjustable vertical positioning guide for patellar fracture fixation according to claim 4, characterized in that: The guide needle cylinder (5) is provided with a transverse plate (12), the transverse plate (12) is provided with a slot (13), the end of the needle core (11) is provided with a push block (14), the push block (14) is provided with an insert block (15), and the insert block (15) is matched with the slot (13).

6. The adjustable vertical positioning guide for patellar fracture fixation according to claim 1, characterized in that: A guide channel (16) that is wide outside and narrow inside is provided in the guide needle cylinder (5).

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