A needle guide device capable of angular fine adjustment

Abstract

The utility model discloses a kind of needle guiding devices that can be angle fine tuning belong to femoral neck kirschner wire needle insertion technical field, including handle holder, the top of handle holder is fixedly installed with mounting column, the top of mounting column is fixedly installed with mounting seat, the upper surface of mounting seat is fixedly installed with fixed guide, the side of mounting seat is fixedly installed with hollow connecting rod, the inside of hollow connecting rod is slidably installed with solid connecting rod;By setting fixed guide and movable guide cooperation, overall structure is pure mechanical structure cooperation, the neck angle of femoral neck kirschner wire can be accurately adjusted, the angle of inclination, improve the angle accuracy of femoral neck kirschner wire, reduce the number of repeated needle insertion, avoid the risk of operation time extension, femoral neck internal mechanical structure drop due to repeated needle insertion, improve surgical efficacy, also same can reduce patient and operator C arm machine perspective number, reduce radiation damage.

Description

Technical Field

[0001] This utility model belongs to the field of femoral neck Kirschner wire insertion technology, specifically relating to a needle insertion guide device with adjustable angle. Background Technology

[0002] Kirschner wires are a commonly used internal fixation material in orthopedics. Their original specifications typically involved fixing fractures around 20 cm in diameter, with several different sizes ranging from 0.5 to 2 mm. They are used for fixing short fractures or avulsion fractures and other fractures with low stress, and are also frequently used for temporary fixation of fracture fragments during orthopedic surgery. Due to their widespread use, the maximum diameter of Kirschner wires has gradually increased to 4 mm, and with the development of external fixation devices, they are used in conjunction with locking screws to fix larger fractures in emergencies such as pelvic fractures and calcaneal fractures.

[0003] Percutaneous femoral neck Kirschner wire insertion is a routine procedure in orthopedic clinical practice. Whether it's closed cannulated screw fixation for femoral neck fractures or core decompression surgery for early-stage avascular necrosis of the femoral head, a suitable anteversion angle, neck-shaft angle, and Kirschner wire insertion through the femoral neck are prerequisites. However, due to limitations imposed by the surgeon's experience and patient positioning, coupled with the confined space of the femoral neck, multiple attempts are often required to successfully insert the Kirschner wire through the femoral neck at the desired angle and position. The drawbacks of repeated attempts are obvious: in addition to causing additional damage to patients and surgeons under C-arm fluoroscopy, it also reduces the mechanical strength of the bone, increasing the risk of surgical failure.

[0004] To address this, we propose a needle-threading guide device with adjustable angle. Utility Model Content

[0005] The purpose of this invention is to provide a needle-guided device with adjustable angle to address the percutaneous femoral neck Kirschner wire insertion technique mentioned in the background art. This technique is a routine procedure in orthopedic clinical practice, whether for closed cannulated screw fixation of femoral neck fractures or core decompression surgery for early-stage avascular necrosis of the femoral head. Appropriate anteversion angles, neck-shaft angles, and Kirschner wire insertion through the femoral neck are prerequisites. However, due to limitations imposed by the surgeon's experience and patient positioning, coupled with the confined space of the femoral neck, multiple attempts are often required to ensure the Kirschner wire passes through the femoral neck and is positioned at the desired angle. The drawbacks of repeated attempts are obvious: besides causing additional damage to patients and surgeons under C-arm fluoroscopy, it also reduces the mechanical strength of the bone, increasing the risk of surgical failure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a needle-threading guide device with adjustable angle, comprising a handle holder, a mounting post fixedly mounted on the top of the handle holder, a mounting base fixedly mounted on the top of the mounting post, a fixed guide fixedly mounted on the upper surface of the mounting base, a hollow connecting rod fixedly mounted on the side of the mounting base, a solid connecting rod slidably mounted inside the hollow connecting rod, one end of the solid connecting rod slidably extending out of the hollow connecting rod and fixedly mounted on a fixed base, a rotating seat rotatably mounted inside the fixed base, and a movable guide rotatably mounted inside the rotating seat.

[0007] The above-mentioned scheme, using a combination of fixed and movable guides in a purely mechanical structure, allows for precise adjustment of the neck-shaft angle and anteversion angle of the femoral neck Kirschner wire. This improves the angular accuracy of the femoral neck Kirschner wire, reduces the number of repeated insertions, and avoids the risks of prolonged operation time and decreased biomechanical structure within the femoral neck caused by repeated insertions, thus improving surgical efficacy. It also reduces the number of times patients and surgeons need C-arm fluoroscopy, reducing radiation damage. By using hollow and solid connecting rods in combination, the distance between the fixed and movable guides can be adjusted, thereby improving the versatility of insertion and the ease of operation.

[0008] In the above scheme, it should be noted that the neck-shaft angle of the femoral neck Kirschner wire is defined as the angle between the femoral neck Kirschner wire in the coronal plane and the longitudinal axis of the patient's body; the anteversion angle of the femoral neck Kirschner wire is defined as the angle between the femoral neck Kirschner wire and the coronal plane of the patient.

[0009] In a preferred embodiment, an adjusting rod is fixedly installed at one end of the solid connecting rod located inside the hollow connecting rod. An adjusting channel is formed on the surface of the hollow connecting rod, and the adjusting rod extends out of the hollow connecting rod through the adjusting channel. The surface of the adjusting rod has threads and an adjusting nut is threaded onto the threads.

[0010] Using the above scheme, the adjusting rod passes through the adjusting channel and is used in conjunction with the adjusting nut to achieve the adjustment and locking of the solid connecting rod extending into the hollow connecting rod. The adjustment structure is simple and the operation is convenient.

[0011] In a preferred embodiment, an anti-slip pad is attached to the lower surface of the adjusting nut, and the anti-slip pad is attached to the surface of the hollow connecting rod.

[0012] By adopting the above solution, the anti-slip pads can provide a fixed and anti-slip effect, thereby preventing the connection between the hollow and solid connecting rods from becoming loose and improving the stability of the performance.

[0013] In a preferred embodiment, a limiting slider is fixedly installed on the inner wall of the hollow connecting rod, and a limiting groove is provided on the side of the solid connecting rod for the limiting slider to slide.

[0014] By adopting the above scheme, the movement of the solid connecting rod can be supported and guided by the sliding of the limiting slider in the limiting groove, thereby improving stability and preventing the solid connecting rod from sliding off the hollow connecting rod.

[0015] In a preferred embodiment, the inner wall of the fixed seat is horizontally rotatably mounted with two rotating shafts, the rotating seat is fixedly mounted between the two rotating shafts, the side of the fixed seat is provided with an arc-shaped slide rail and a bolt passes through the arc-shaped slide rail, and the tail end of the bolt is used to cooperate with the threaded groove provided on the side of the rotating seat.

[0016] Using the above scheme, the rotating shaft is used in conjunction with the bolt. When the bolt is unscrewed, the rotating seat is unlocked. At this time, the rotating seat can be tilted through the rotating shaft to adjust the forward tilt angle of the movable guide. After adjustment, the bolt is screwed in to lock it.

[0017] In a preferred embodiment, two rotating shafts are vertically rotatably mounted on the inner wall of the rotating seat, and the movable guide is fixedly installed between the two rotating shafts. An arc-shaped slide is provided on the surface of the rotating seat, and a bolt passes through the arc-shaped slide. A threaded groove is provided on the surface of the movable guide for the bolt to be screwed into.

[0018] Using the above scheme, the second rotating shaft is used in conjunction with the second bolt. When the second bolt is unscrewed, the movable guide is unlocked. At this time, the movable guide can be rotated horizontally through the second rotating shaft, thereby adjusting the neck angle of the movable guide. After adjustment, the second bolt is screwed in to lock it.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This finely adjustable needle-guided device uses a combination of a fixed guide and a movable guide. The overall structure is purely mechanical, which can precisely adjust the neck-shaft angle and anteversion angle of the femoral neck Kirschner wire, improve the angle accuracy of the femoral neck Kirschner wire, reduce the number of repeated needle insertions, avoid the risks of prolonged operation time and decreased biomechanical structure of the femoral neck caused by repeated needle insertions, improve surgical efficacy, and also reduce the number of times patients and surgeons need C-arm fluoroscopy, thus reducing radiation damage.

[0021] This needle-threading guide device, which allows for fine-tuning of the angle, uses a combination of hollow and solid connecting rods to adjust the distance between the fixed and movable guides, thereby improving the versatility of needle-threading applications and the ease of operation and adjustment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a structural schematic diagram of the cross-section of the hollow connecting rod of this utility model;

[0024] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0025] Figure 4 This is a schematic diagram of the structure of the fixed base and the rotating base of this utility model.

[0026] In the diagram: 1. Handle holder; 2. Mounting post; 3. Mounting base; 4. Fixed guide; 5. Hollow connecting rod; 6. Solid connecting rod; 7. Fixed base; 8. Rotating base; 9. Movable guide; 10. Anti-slip rubber sleeve; 11. Rotating shaft one; 12. Bolt one; 13. Rotating shaft two; 14. Bolt two; 15. Adjusting rod; 16. Adjusting nut; 17. Anti-slip pad; 18. Limiting slider. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-4 This utility model provides a needle-threading guide device with adjustable angle, including a handle holder 1, a mounting post 2 fixedly installed at the top of the handle holder 1, a mounting base 3 fixedly installed at the top of the mounting post 2, a fixed guide 4 fixedly installed on the upper surface of the mounting base 3, a hollow connecting rod 5 fixedly installed on the side of the mounting base 3, a solid connecting rod 6 slidably installed inside the hollow connecting rod 5, one end of the solid connecting rod 6 slidably extends out of the hollow connecting rod 5 and is fixedly installed on a fixed base 7, a rotating base 8 is rotatably installed inside the fixed base 7, and a movable guide 9 is rotatably installed inside the rotating base 8.

[0031] By using a fixed guide 4 and a movable guide 9 together, the overall structure is a purely mechanical structure that can precisely adjust the neck-shaft angle and anteversion angle of the femoral neck Kirschner wire, improving the angular accuracy of the femoral neck Kirschner wire, reducing the number of repeated insertions, avoiding the risks of prolonged operation time and decreased biomechanical structure of the femoral neck caused by repeated insertions, and improving surgical efficacy. It can also reduce the number of times patients and surgeons need C-arm fluoroscopy, reducing radiation damage. By using a hollow connecting rod 5 and a solid connecting rod 6 together, the distance between the fixed guide 4 and the movable guide 9 can be adjusted, thereby improving the universality of insertion and the ease of operation and adjustment.

[0032] An adjusting rod 15 is fixedly installed at one end of the solid connecting rod 6 inside the hollow connecting rod 5. An adjusting channel is opened on the surface of the hollow connecting rod 5. The adjusting rod 15 extends out of the hollow connecting rod 5 through the adjusting channel. The surface of the adjusting rod 15 has threads and an adjusting nut 16 is installed on the threads. The adjusting rod 15 passes through the adjusting channel and is used in conjunction with the adjusting nut 16 to realize the adjustment and locking of the length of the solid connecting rod 6 extending out of the hollow connecting rod 5. The adjustment structure is simple and the operation is convenient.

[0033] An anti-slip pad 17 is attached to the lower surface of the adjusting nut 16. The anti-slip pad 17 is attached to the surface of the hollow connecting rod 5. The anti-slip pad 17 can play a role in fixing and preventing slippage, thereby avoiding loosening between the hollow connecting rod 5 and the solid connecting rod 6 and improving the stability of the use.

[0034] A limiting slider 18 is fixedly installed on the inner wall of the hollow connecting rod 5. A limiting groove is provided on the side of the solid connecting rod 6 for the limiting slider 18 to slide. By using the limiting slider 18 to slide in the limiting groove, the movement of the solid connecting rod 6 can be supported and guided, improving stability and preventing the solid connecting rod 6 from sliding off the hollow connecting rod 5.

[0035] The inner wall of the fixed seat 7 is horizontally rotatably mounted with two rotating shafts 11. The rotating seat 8 is fixedly installed between the two rotating shafts 11. The side of the fixed seat 7 is provided with an arc-shaped slide rail and a bolt 12 passes through the arc-shaped slide rail. The tail end of the bolt 12 is used in conjunction with the threaded groove on the side of the rotating seat 8. The rotating shafts 11 are used in conjunction with the bolt 12. When the bolt 12 is unscrewed, the rotating seat 8 is unlocked. At this time, the rotating seat 8 can be tilted through the rotating shafts 11, thereby realizing the adjustment of the forward tilt angle of the movable guide 9. After adjustment, the bolt 12 is screwed in to lock it.

[0036] Two rotating shafts 13 are vertically mounted on the inner wall of the rotating seat 8. The movable guide 9 is fixedly installed between the two rotating shafts 13. The surface of the rotating seat 8 is provided with an arc-shaped slide rail, and a bolt 14 passes through the arc-shaped slide rail. The surface of the movable guide 9 is provided with a threaded groove for the bolt 14 to be screwed in. The rotating shafts 13 are used in conjunction with the bolt 14. When the bolt 14 is screwed out, the movable guide 9 is unlocked. At this time, the movable guide 9 can be rotated horizontally through the rotating shafts 13, thereby realizing the adjustment of the neck angle of the movable guide 9. After adjustment, the bolt 14 is screwed in to lock it.

[0037] During use, the fixed guide 4 is operated via the handle holder 1 to insert the first femoral neck Kirschner wire. Then, based on the intraoperative mobile C-arm X-ray fluoroscopy of the affected hip joint in the supine position (anteroposterior and frog-leg views), and according to the definitions of the femoral neck Kirschner wire neck-shaft angle and anteversion angle in the previous paragraph, the angles lacking in both the neck-shaft angle and anteversion angle of the first femoral neck Kirschner wire can be clearly identified. These lacking angles can be precisely fine-tuned using the adjustable movable guide 9. During fine-tuning, screw 12 is unscrewed, at which point the rotating seat 8 is unlocked and can be tilted via the rotating shaft 11 to adjust the anteversion angle of the movable guide 9. Then, screw 12 in to lock it, and then screw 214 out. At this point, the movable guide... The guide 9 is unlocked and can be rotated horizontally via the pivot 13 to adjust the neck-shaft angle of the movable guide 9. After fine-tuning the neck-shaft angle and anteversion angle of the two planes, the entire rotation can be achieved by manually operating the handle holder 1 under C-arm fluoroscopy, or by adjusting the solid connecting rod 6 and the hollow connecting rod 5. When adjusting, unscrew the adjusting nut 16. At this time, the solid connecting rod 6 is unlocked and can slide relative to the hollow connecting rod 5, thereby adjusting the distance between the fixed guide 4 and the movable guide 9. After adjustment, tighten the adjusting nut 16 to lock it, and the appropriate insertion point of the second femoral neck Kirschner wire can be determined. At this time, the drilled second femoral neck Kirschner wire has obtained the appropriate neck-shaft angle and anteversion angle.

Claims

1. A needle-threading guide device with adjustable angle, characterized in that: The device includes a handle holder (1), a mounting post (2) is fixedly installed at the top of the handle holder (1), a mounting base (3) is fixedly installed at the top of the mounting post (2), a fixing guide (4) is fixedly installed on the upper surface of the mounting base (3), a hollow connecting rod (5) is fixedly installed on the side of the mounting base (3), a solid connecting rod (6) is slidably installed inside the hollow connecting rod (5), one end of the solid connecting rod (6) extends slidably out of the hollow connecting rod (5) and is fixedly installed with a fixing base (7), a rotating base (8) is rotatably installed inside the fixing base (7), and a movable guide (9) is rotatably installed inside the rotating base (8).

2. The needle-threading guide device with adjustable angle according to claim 1, characterized in that: An adjusting rod (15) is fixedly installed at one end of the solid connecting rod (6) inside the hollow connecting rod (5). An adjusting channel is opened on the surface of the hollow connecting rod (5). The adjusting rod (15) extends out of the hollow connecting rod (5) through the adjusting channel. The surface of the adjusting rod (15) has threads and an adjusting nut (16) is installed on the threads.

3. The needle-threading guide device with adjustable angle according to claim 2, characterized in that: The lower surface of the adjusting nut (16) is fitted with an anti-slip pad (17), which is fitted onto the surface of the hollow connecting rod (5).

4. The needle-threading guide device with adjustable angle according to claim 1, characterized in that: The hollow connecting rod (5) has a limiting slider (18) fixedly installed on its inner wall, and the solid connecting rod (6) has a limiting groove on its side for the limiting slider (18) to slide.

5. The needle-threading guide device with adjustable angle according to claim 1, characterized in that: The inner wall of the fixed seat (7) is horizontally rotatably mounted with two rotating shafts (11). The rotating seat (8) is fixedly installed between the two rotating shafts (11). The side of the fixed seat (7) is provided with an arc-shaped slide rail and a bolt (12) passes through the arc-shaped slide rail. The tail end of the bolt (12) is used in conjunction with the threaded groove on the side of the rotating seat (8).

6. The needle-threading guide device with adjustable angle according to claim 1, characterized in that: The inner wall of the rotating seat (8) is vertically rotatably mounted with two rotating shafts (13). The movable guide (9) is fixedly installed between the two rotating shafts (13). The surface of the rotating seat (8) is provided with an arc-shaped slide rail and a bolt (14) passes through the arc-shaped slide rail. The surface of the movable guide (9) is provided with a threaded groove for the bolt (14) to be screwed in.

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