A bone graft assembly for use in orthopedic minimally invasive surgery

Abstract

The utility model provides a kind of bone grafting assembly for orthopedics minimally invasive surgery belongs to medical instrument technical field. Bone grafting assembly for orthopedics minimally invasive surgery, including and kirschner wire, hollow nail and sleeve, hollow nail is movably connected in the inside of sleeve, kirschner wire is movably connected in the inside of hollow nail, kirschner wire is fixedly connected in the inside of patient's skeleton, sleeve includes magnetic attraction part, side connecting part, corner groove and straight guide groove, side connecting part outside is detachably connected with stopper, further include: material pushing rod, material pushing rod movably connected in the inside of sleeve, material pushing rod includes long rod, material pushing piston, feeding rotary disc and dosing cylinder, long rod is provided with the increase of friction line in long rod far from material pushing piston one end, dosing cylinder outside is fixedly connected with sliding link convex. The utility model has the advantages of can fast independent positioning connection, can adapt to each attitude and be convenient for filling material.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a bone grafting component used in minimally invasive orthopedic surgery. Background Technology

[0002] Orthopedic trauma refers to damage to the human skeleton caused by external factors. It is very common in clinical treatment and has a high incidence rate. As a branch of orthopedics, trauma orthopedics includes a wide range of conditions, commonly including joint injuries and limb fractures.

[0003] Fracture surgery can generally be divided into two steps: reduction and fixation. Currently, except for severe comminuted fractures, closed reduction is commonly used clinically, meaning reduction is performed without cutting the fracture ends. Fracture fixation often employs minimally invasive methods, such as intramedullary fixation or subcutaneous plate fixation, neither of which requires cutting the fracture ends. Bone grafting at the fracture ends is an effective technique for promoting fracture healing; during open surgery, it can reduce the incidence of nonunion. However, closed reduction and minimally invasive fixation techniques do not involve cutting the fracture ends, making bone grafting impossible. Therefore, this application provides a bone grafting component for minimally invasive orthopedic surgery, allowing bone grafting without cutting the fracture ends. Utility Model Content

[0004] To address the aforementioned technical issues, this invention proposes a bone graft component for minimally invasive orthopedic surgery that can be quickly and autonomously positioned and connected, adaptable to various postures, and easy to fill with materials.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A bone grafting component for minimally invasive orthopedic surgery includes a Kirschner wire, a hollow screw, and a sleeve. The hollow screw is movably connected inside the sleeve, and the Kirschner wire is movably connected inside the hollow screw. The Kirschner wire is fixedly connected inside the patient's bone. The sleeve includes a magnetic suction part, a side connection part, a corner groove, and a straight guide groove. The side connection part is externally detachably connected to a plug. The component also includes:

[0007] The ejector rod is movably connected inside the sleeve. The ejector rod includes a long rod, an ejector piston, a feeding turntable, and a metering cylinder. The end of the long rod away from the ejector piston has friction-enhancing grooves, and the metering cylinder is fixedly connected to a sliding lug.

[0008] Furthermore, the magnetic attraction part is fixedly connected inside the sleeve and the hollow nail connection end, the side connection part is opened on the side of the sleeve away from the magnetic attraction part, the corner groove is opened inside the sleeve, the straight guide groove is opened inside the sleeve, and the corner groove and the straight guide groove are interconnected.

[0009] Furthermore, the magnetic attraction part is magnetically connected to the hollow nail, and the hollow nail and the sleeve are interconnected.

[0010] Furthermore, the long rod is movably connected inside the sleeve, the top piston is fixedly connected to one end of the long rod located inside the sleeve, the feeding turntable is movably connected to the outside of the long rod, and the metering cylinder is movably connected to the outside of the feeding turntable.

[0011] Furthermore, a gap is provided between the metering cylinder and the top material piston, the diameter of the top material piston is smaller than the inner diameter of the sleeve, the sliding coupling cam is fitted into the corner groove, and the feeding turntable is fitted into the straight guide groove.

[0012] Furthermore, a detachable funnel is movably connected to the outside of the sleeve. A snap-fit ​​protrusion is fixedly connected to the straight handle end of the detachable funnel. A limit ring is fixedly connected to the outside of the snap-fit ​​protrusion. The limit ring has the same diameter as the end of the sleeve. The snap-fit ​​protrusion can snap into both the corner groove and the straight guide groove. The detachable funnel can be movably connected to the sleeve port or the side connection part as needed.

[0013] Furthermore, the magnetic suction part is located inside the sleeve and fits into the shape of the top material piston, and artificial bone particles are placed inside the detachable funnel.

[0014] Furthermore, both the snap-fit ​​protrusion and the sealing plug contain magnetic materials and are magnetically connected to the sleeve.

[0015] This utility model has the following beneficial effects:

[0016] 1. By setting up a sleeve and a top rod, the device can be quickly connected to the hollow nail. With the help of the sleeve, the artificial bone particles can be more easily delivered into the hollow nail, preventing the artificial bone particles from falling into the patient's wound and causing harm to the patient.

[0017] 2. By setting a detachable funnel, the device can be adjusted according to the orientation of the patient's injured area and the ease of operation during the actual operation, ensuring the smooth introduction of artificial bone particles and improving the feasibility and convenience of operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall appearance of this utility model;

[0019] Figure 2 This is an exploded view of the internal structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the sleeve of this utility model;

[0021] Figure 4 This is a schematic diagram of the overall appearance of the top material rod of this utility model;

[0022] Figure 5 This is a schematic diagram of the overall appearance of the detachable funnel of this utility model.

[0023] Among them: 1. Kirschner wire; 2. Hollow nail; 3. Sleeve; 301. Magnetic suction part; 302. Side connection part; 303. Sealing plug; 304. Corner groove; 305. Straight guide groove; 4. Detachable funnel; 401. Snap-fit ​​protrusion; 402. Limiting ring; 5. Ejector rod; 501. Long rod; 502. Ejector piston; 503. Feeding turntable; 504. Metering cylinder; 505. Sliding protrusion; 506. Friction-increasing texture. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of this utility model.

[0025] Example 1

[0026] Please see Figures 1 to 5 This utility model provides a bone grafting component for minimally invasive orthopedic surgery, including a Kirschner wire 1, a hollow screw 2, and a sleeve 3. The hollow screw 2 is movably connected inside the sleeve 3, and the Kirschner wire 1 is movably connected inside the hollow screw 2. The Kirschner wire 1 is fixedly connected inside the patient's bone. The sleeve 3 includes a magnetic suction part 301, a side connection part 302, a corner groove 304, and a straight guide groove 305. A plug 303 is detachably connected to the side connection part 302. The component also includes:

[0027] The ejector rod 5 is movably connected inside the sleeve 3. The ejector rod 5 includes a long rod 501, an ejector piston 502, a feeding turntable 503, and a metering cylinder 504. The long rod 501 has a friction-enhancing groove 506 at the end away from the ejector piston 502. The metering cylinder 504 has a sliding protrusion 505 fixedly connected to its exterior.

[0028] Specifically, during the operation, Kirschner wire 1 is driven into the patient's bone using a tool to complete the positioning. Then, hollow nail 2 is pierced and fixed to the patient's bone along the guide of Kirschner wire 1. Finally, the magnetic suction part 301 is magnetically connected to the end of hollow nail 2, so that hollow nail 2 and the internal channel of sleeve 3 are interconnected. Then, detachable funnel 4 is installed on the outside of the sleeve 3 port or side connection part 302. Finally, the top material rod 5 is pushed into the sleeve 3 as a whole, thus completing the assembly of the device.

[0029] Example 2

[0030] Please see Figures 1 to 5As shown in Embodiment 1, the magnetic suction part 301 is fixedly connected to the inside of the connection end between the sleeve 3 and the hollow nail 2. The side connection part 302 is opened on the side of the sleeve 3 away from the magnetic suction part 301. The corner groove 304 is opened inside the sleeve 3. The straight guide groove 305 is opened inside the sleeve 3. The corner groove 304 and the straight guide groove 305 are connected. The magnetic suction part 301 is magnetically connected to the hollow nail 2. The hollow nail 2 and the sleeve 3 are interconnected. The long rod 501 is movably connected inside the sleeve 3. The top piston 502 is fixedly connected to one end of the long rod 501 located inside the sleeve 3. The feeding turntable 503 is movably connected to the outside of the long rod 501. The metering cylinder 504 is movably connected to the outside of the feeding turntable 503.

[0031] With the above settings, when the device is in a relatively vertical state, the detachable funnel 4 is installed at the end of the sleeve 3. The snap-fit ​​protrusion 401 and the corner groove 304 or the straight guide groove 305 are interlocked and magnetically connected. The top material rod 5 is inserted into the sleeve 3 through the detachable funnel 4. During this process, the sliding protrusion 505 is interlocked with the corner groove 304, and the feeding turntable 503 is interlocked with the straight guide groove 305. Then, the artificial bone particles are placed into the detachable funnel 4, and the long rod 501 is pulled to move outward from the sleeve 3. During the movement of 503 along the corner groove 304, it rotates 90 degrees, thereby aligning the feeding turntable 503 with the opening of the metering cylinder 504. Then, the artificial bone particles fall into the metering cylinder 504 through the opening. The initial metering is completed by the relative static friction between the artificial bone particles. Then, the long rod 501 is pushed to move towards the hollow nail 2. During this process, the artificial bone particles fall downward through the gap between the top piston 502 and the metering cylinder 504. Finally, under the pressure of the top piston 502, they are introduced into the hollow nail 2.

[0032] Example 3

[0033] Please see Figures 1 to 5 As shown in Example 2, a gap is provided between the metering cylinder 504 and the top feed piston 502. The diameter of the top feed piston 502 is smaller than the inner diameter of the sleeve 3. The sliding protrusion 505 is fitted and connected to the corner groove 304. The feeding turntable 503 is fitted and connected to the straight guide groove 305. A detachable funnel 4 is movably connected to the outside of the sleeve 3. A snap-fit ​​protrusion 401 is fixedly connected to the straight handle end of the detachable funnel 4. A limit ring 402 is fixedly connected to the outside of the snap-fit ​​protrusion 401. The limit ring 402 has the same diameter as the end of the sleeve 3. The snap-fit ​​protrusion 401 can be snapped into both the corner groove 304 and the straight guide groove 305. The detachable funnel 4 can be movably connected to the port or the side connection part 302 of the sleeve 3 as needed. The magnetic suction part 301 is located inside the sleeve 3 and fits into the shape of the top feed piston 502. Artificial bone particles are placed inside the detachable funnel 4. The snap-fit ​​protrusion 401 and the sealing plug 303 both contain magnetic materials and are magnetically connected to the sleeve 3.

[0034] With the above settings, if the device is in a relatively horizontal state, the detachable funnel 4 is installed at the end of the sleeve 3, and the snap-fit ​​protrusion 401 and the sealing plug 303 are interlocked and magnetically connected. At this time, the top material rod 5 is directly inserted into the sleeve 3. During operation, artificial bone particles need to be fed into the detachable funnel 4 in small amounts multiple times. The particles fall into the sleeve 3 through the detachable funnel 4. Then, by pushing the long rod 501, the top material piston 502 pushes the particles towards the hollow nail 2 and guides them in. After the introduction is completed, the remaining particles are blocked by the magnetic suction part 301 and remain inside the sleeve 3 to prevent the particles from falling into the patient's wound.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bone graft assembly for use in minimally invasive orthopedic surgery, comprising Kirschner wires (1), hollow screws (2), and a sleeve (3), characterized in that, Hollow screw (2) is movably connected inside sleeve (3), Kirschner wire (1) is movably connected inside hollow screw (2), and Kirschner wire (1) is fixedly connected inside the patient's bone. Sleeve (3) includes magnetic suction part (301), side connection part (302), corner groove (304) and straight guide groove (305). The side connection part (302) is externally connected to a plug (303). It also includes: The top material rod (5) is movably connected inside the sleeve (3). The top material rod (5) includes a long rod (501), a top material piston (502), a feeding turntable (503), and a metering cylinder (504). The long rod (501) has a friction-enhancing groove (506) at the end away from the top material piston (502). The metering cylinder (504) has a sliding protrusion (505) fixedly connected to the outside.

2. The bone grafting component for minimally invasive orthopedic surgery according to claim 1, characterized in that, The magnetic suction part (301) is fixedly connected to the inside of the connection end between the sleeve (3) and the hollow nail (2). The side connection part (302) is opened on the side of the sleeve (3) away from the magnetic suction part (301). The corner groove (304) is opened inside the sleeve (3). The straight guide groove (305) is opened inside the sleeve (3). The corner groove (304) and the straight guide groove (305) are interconnected.

3. The bone grafting component for minimally invasive orthopedic surgery according to claim 1, characterized in that, The magnetic suction part (301) is magnetically connected to the hollow nail (2), and the hollow nail (2) and the sleeve (3) are interconnected.

4. A bone grafting component for minimally invasive orthopedic surgery according to claim 1, characterized in that, The long rod (501) is movably connected inside the sleeve (3), the top piston (502) is fixedly connected to one end of the long rod (501) located inside the sleeve (3), the feeding turntable (503) is movably connected outside the long rod (501), and the metering cylinder (504) is movably connected outside the feeding turntable (503).

5. A bone grafting component for minimally invasive orthopedic surgery according to claim 4, characterized in that, A gap is provided between the metering cylinder (504) and the top material piston (502). The diameter of the top material piston (502) is smaller than the inner diameter of the sleeve (3). The sliding cam (505) is fitted and connected with the corner groove (304). The feeding turntable (503) is fitted and connected with the straight guide groove (305).

6. A bone grafting component for minimally invasive orthopedic surgery according to claim 1, characterized in that, The sleeve (3) is externally connected to a detachable funnel (4). The straight handle end of the detachable funnel (4) is fixedly connected to a snap-fit ​​protrusion (401). The snap-fit ​​protrusion (401) is externally connected to a limit ring (402). The limit ring (402) has the same diameter as the end of the sleeve (3). The snap-fit ​​protrusion (401) can be snapped into the corner groove (304) and the straight guide groove (305). The detachable funnel (4) can be movably connected to the port of the sleeve (3) or the side connection part (302) according to the requirements.

7. A bone grafting component for minimally invasive orthopedic surgery according to claim 1, characterized in that, The magnetic suction part (301) is located inside the sleeve (3) and fits into the shape of the top piston (502). The detachable funnel (4) contains artificial bone particles.

8. A bone grafting component for minimally invasive orthopedic surgery according to claim 1, characterized in that, Both the snap-fit ​​protrusion (401) and the plug (303) contain magnetic materials and are magnetically connected to the sleeve (3).

Images