Bone grafting set device for minimally invasive spinal surgery

Abstract

The utility model discloses a bone grafting set device for minimally invasive spinal surgery, which comprises a sleeve, an armrest frame is embedded and fixed at the lower part of the outer side of the sleeve, a conveying pipe is embedded and fixed at the center of the bottom of the sleeve, a sliding block is matched with the inner side of the conveying pipe in an up-and-down sliding manner, a straight rack is fixedly connected at the center of the top of the sliding block, and the straight rack is fixedly connected with the handle. A transmission gear is rotationally meshed with the left side of the spur rack, the transmission gear leftwards extends out of the sleeve, a gap is reserved between the transmission gear and the sleeve, the outer side of the transmission gear is covered with a protective shell sleeve in an isolated mode, a rotating shaft is fixedly connected to the center of the front side of the transmission gear, and a distance adjusting knob is fixedly connected to the outer side of the front end of the rotating shaft; a common linear pushing mode is replaced with a gear rotating meshing mode, more stable controllability is achieved, force control is more accurate, the bone grain extrusion rate is more stable, in addition, compared with a partial spiral pushing mode, the transmission effect is more direct, and the extrusion rate is higher.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a bone grafting kit for minimally invasive spinal surgery. Background Technology

[0002] Bone grafting is one of the most commonly used techniques in spinal surgery. Currently, there are two common methods for spinal bone grafting. One method is to manually implant bone particles into the bone defect using forceps or other holding tools. This method is difficult to operate, has a low safety factor, and a low bone grafting rate, so it has been abandoned. The other method is to perform intervertebral space and transpedicular vertebral body bone grafting using bone grafting instruments currently available in clinical practice.

[0003] Most current bone grafting instruments use a piston rod to push bone particles into the grafting area of ​​the body in a straight line. Some use a spiral propulsion structure for pressure grafting. The former has low control stability and is prone to slipping back and forth along the extrusion path. Moreover, the pushing force is difficult to control, resulting in large fluctuations in the extrusion rate and affecting the bone grafting effect. The latter has too low conversion efficiency between spiral rotation and straight delivery, and the transmission effect is weak, which leads to low bone particle extrusion efficiency and affects the bone grafting efficiency. In addition, the amount of bone particles extruded is mostly observed by visual inspection of the filling status, which is not rigorous and accurate enough. Furthermore, for some narrow and deep bone grafting areas, bone grafting instruments are difficult to insert, and there is a lack of auxiliary tools to improve the comprehensiveness of bone grafting. Utility Model Content

[0004] The purpose of this invention is to provide a bone grafting kit for minimally invasive spinal surgery. It replaces the common linear pushing method with a gear-driven meshing mechanism, which provides more stable control, more precise force control, and a more stable bone particle extrusion rate. In addition, compared with some spiral propulsion methods, it has a more direct transmission effect and a faster extrusion rate. It can also mark and measure the delivery distance in real time to help doctors control the amount of bone particles extruded and ensure bone grafting accuracy. Furthermore, it is equipped with a slender syringe that can be assembled and connected with the delivery tube to provide more comprehensive bone grafting operations.

[0005] To achieve the above objectives, a bone grafting kit for minimally invasive spinal surgery is provided, comprising a sleeve, a handrail fixedly fitted to the lower outer side of the sleeve, a delivery tube fixedly fitted to the center of the bottom of the sleeve, a slider slidingly engaged with the inner side of the delivery tube, a rack fixedly connected to the center of the top of the slider, the top of the rack extending out of the sleeve and slidingly engaged with it, a transmission gear rotatably engaging with the left side of the rack, the transmission gear extending to the left of the sleeve with a gap between them, a protective shell covering the outer side of the transmission gear, the right side and bottom of the protective shell being fixedly connected to the sleeve and the handrail respectively, a rotating shaft fixedly connected to the center of the front side of the transmission gear, the front end of the rotating shaft extending out of the protective shell and rotatably engaged with it, an adjustment knob fixedly connected to the outer side of the front end of the rotating shaft, and the bottom of the delivery tube... A retaining sleeve is fixedly engaged at the center of the device, and a syringe is fixedly connected to the bottom center of the retaining sleeve. A vertical scale mark is provided on the front side of the rack, embedded in the inner wall of the rack. By replacing the conventional straight push rod with a rack and cooperating with a transmission gear and adjustment knob, the common linear pushing method is transformed into a gear-driven meshing method. Compared to the former, this method offers more stable control, more precise force control, and a more stable bone particle extrusion rate without significant fluctuations. Furthermore, it provides a more direct transmission effect and a faster extrusion rate compared to some spiral propulsion methods. Additionally, the scale mark on the side of the rack is used to measure the delivery distance, assisting doctors in controlling the amount of bone particles extruded and ensuring bone grafting accuracy. For narrower and deeper bone grafting areas, a slender syringe is provided for assembly and docking with the delivery tube, providing more comprehensive bone grafting services.

[0006] According to the bone grafting kit for minimally invasive spinal surgery, the outer side of the adjusting knob is covered with an anti-slip rubber sleeve, and both the front and rear edges of the adjusting knob are rounded. This facilitates the operator's twisting and feeding of materials.

[0007] According to the bone grafting kit for minimally invasive spinal surgery, the outer side of the rack slides up and down in conjunction with a limiting ring, the bottom of which is fixedly connected to a sleeve. This provides linear displacement limiting assistance for the rack.

[0008] According to the bone graft kit for minimally invasive spinal surgery, a synovial membrane is fitted around the inner side of the delivery tube to ensure smooth extrusion of bone particles.

[0009] According to the bone grafting kit for minimally invasive spinal surgery, a limiting baffle is fitted and fixed to the top front side of the straight rack, and a rubber pad is fitted and fixed to the bottom of the limiting baffle. The straight rack is then subjected to a downward limit.

[0010] According to the bone grafting kit for minimally invasive spinal surgery, an expansion piston is fixedly connected to the bottom of the slider, and the outer side of the expansion piston is pressed and fitted against the delivery tube. This improves the sliding seal of the slider inside the delivery tube.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, a straight rack is used to replace the conventional straight push rod, and in conjunction with a transmission gear and an adjustment knob, the common linear pushing method is transformed into a gear rotation meshing method. Compared with the former, it has more stable control, more precise force control, and a more stable bone particle extrusion rate without significant fluctuations. In addition, it has a more direct transmission effect and a faster extrusion rate compared with some spiral propulsion methods. Furthermore, scale markings are set on the side of the rack to measure the delivery distance, thereby assisting doctors in controlling the amount of bone particles extruded and ensuring bone grafting accuracy. For some narrower and deeper bone grafting areas, a slender syringe is also provided to assemble and connect with the delivery tube, providing a more comprehensive bone grafting operation.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a schematic diagram illustrating the storage of a bone graft kit for minimally invasive spinal surgery according to this utility model.

[0016] Figure 2 This is a schematic diagram illustrating the docking and use of a bone grafting kit for minimally invasive spinal surgery according to this utility model.

[0017] Figure 3 This is a schematic diagram of the connection structure between the transmission gear and the spur rack in a bone grafting kit for minimally invasive spinal surgery according to this utility model.

[0018] Figure 4 This is a schematic diagram of the delivery tube and syringe in a bone graft kit for minimally invasive spinal surgery according to this utility model.

[0019] In the diagram: 1. Sleeve; 2. Handrail; 3. Slider; 4. Rack and pinion; 5. Transmission gear; 6. Protective housing; 7. Adjustment knob; 8. Delivery pipe; 9. Cubicles; 10. Syringe; 11. Scale markings; 12. Limiting ring; 13. Limiting baffle; 14. Expansion piston. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a bone grafting kit for minimally invasive spinal surgery, including a sleeve 1, a handrail 2 fixedly fitted to the lower outer side of the sleeve 1, a delivery tube 8 fixedly fitted to the center of the bottom of the sleeve 1, a synovial membrane wrapped around the inner side of the delivery tube 8, a slider 3 slidingly fitted to the inner side of the delivery tube 8, an expansion piston 14 fixedly connected to the bottom of the slider 3, and the outer side of the expansion piston 14 pressed against the delivery tube 8 to ensure the sealed extrusion of bone particles.

[0022] A rack 4 is fixedly connected to the top center of slider 3. The top of rack 4 extends out of sleeve 1 and slides up and down with it. A limit ring 12 slides up and down with the outer side of rack 4. A limit baffle 13 is fitted and fixed to the front of the top of rack 4. A rubber pad is fixed to the bottom of limit baffle 13. The bottom of limit ring 12 is fixedly connected to sleeve 1. A transmission gear 5 is rotatably engaged on the left side of rack 4. The transmission gear 5 extends to the left outside sleeve 1 with a gap between them. A protective shell 6 covers the outer side of transmission gear 5. The right side and bottom side of the protective shell 6 are fixedly connected to the sleeve 1 and the handrail 2 respectively. A rotating shaft is fixedly connected to the center of the front side of the transmission gear 5. The front end of the rotating shaft extends out of the protective shell 6 and rotates with it. An adjustment knob 7 is fixedly connected to the outer side of the front end of the rotating shaft. The outer side of the adjustment knob 7 is covered with an anti-slip rubber sleeve. The front and rear edges of the adjustment knob 7 are rounded. The gear rotation meshing method replaces the common linear pushing method, which has more stable control, more precise force control, and more stable bone particle extrusion rate.

[0023] A sleeve 9 is fixedly engaged at the bottom center of the delivery tube 8. A syringe 10 is fixedly connected to the bottom center of the sleeve 9. A scale line 11 is provided vertically on the front side of the straight toothed rack 4. The scale line 11 is embedded in the inner wall of the straight toothed rack 4 to mark and measure the delivery distance in real time, assisting doctors in controlling the amount of bone particles extruded and ensuring the accuracy of bone grafting. The syringe is assembled and connected with the delivery tube to provide a more comprehensive bone grafting operation.

[0024] Working principle: By replacing the conventional straight push rod with a rack and pinion 4, and in conjunction with the transmission gear 5 and the pitch adjustment knob 7, the common linear pushing method is transformed into a gear rotation meshing method. Compared with the former, it has more stable control, more precise force control, and a more stable bone particle extrusion rate without large fluctuations. In addition, compared with some spiral propulsion methods, it has a more direct transmission effect and a faster extrusion rate. Furthermore, a scale mark 11 is set on the side of the rack and pinion 4 to measure the delivery distance, thereby assisting doctors in controlling the amount of bone particles extruded and ensuring bone grafting accuracy. For some narrower and deeper bone grafting areas, a slender syringe 10 is also provided to assemble and connect with the delivery tube 8, providing a more comprehensive bone grafting operation.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A bone grafting kit for minimally invasive spinal surgery, comprising a sleeve (1), characterized in that, A handrail (2) is fitted and fixed to the lower outer side of the sleeve (1). A conveying pipe (8) is fitted and fixed to the center of the bottom of the sleeve (1). A slider (3) is slidably fitted to the inner side of the conveying pipe (8). A rack (4) is fixedly connected to the center of the top of the slider (3). The top of the rack (4) extends out of the sleeve (1) and slides with it. A transmission gear (5) is rotatably engaged on the left side of the rack (4). The transmission gear (5) extends to the left of the sleeve (1) with a gap between them. A protective shell (6) covers the outer side of the transmission gear (5). The right side and bottom side of the protective shell (6) are fixedly connected to the sleeve (1) and the handrail (2) respectively. A rotating shaft is fixedly connected to the center of the front side of the transmission gear (5). The front end of the rotating shaft extends out of the protective shell (6) and rotates with it. An adjustment knob (7) is fixedly connected to the outer side of the front end of the rotating shaft. A sleeve (9) is fixedly engaged at the bottom center of the delivery pipe (8). A syringe (10) is fixedly connected to the bottom center of the sleeve (9). A scale mark (11) is provided vertically on the front side of the rack (4). The scale mark (11) is embedded in the inner wall of the rack (4).

2. The bone grafting kit for minimally invasive spinal surgery as described in claim 1, characterized in that: The outer side of the adjustment knob (7) is covered with an anti-slip rubber sleeve, and the front and rear edges of the adjustment knob (7) are rounded.

3. The bone grafting kit for minimally invasive spinal surgery as described in claim 1, characterized in that: The outer side of the straight rack (4) is slidably fitted with a limiting ring (12), and the bottom of the limiting ring (12) is fixedly connected to the sleeve (1).

4. The bone grafting kit for minimally invasive spinal surgery as described in claim 1, characterized in that: A layer of slurry membrane is attached to the inner side of the delivery pipe (8).

5. The bone grafting kit for minimally invasive spinal surgery as described in claim 1, characterized in that: A limiting baffle (13) is fitted and fixed to the top front side of the rack (4), and a rubber pad is attached and fixed to the bottom of the limiting baffle (13).

6. The bone grafting kit for minimally invasive spinal surgery as described in claim 1, characterized in that: An expansion piston (14) is fixedly connected to the bottom of the slider (3), and the outer side of the expansion piston (14) is pressed and adhered to the conveying pipe (8).

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