Instrument for micro fracture surgery and subchondral bone injection

Abstract

The utility model discloses an instrument for micro fracture surgery and subchondral bone injection, which comprises a handle, the front end of the handle is connected with a conversion interface, the conversion interface is fixedly connected with a connecting rod, the front end of the connecting rod is fixedly connected with a pointed cone part, a liquid inlet pipeline II is arranged in the connecting rod, and a liquid outlet pipeline II is arranged in the liquid inlet pipeline II. Four injection holes in the same direction as the pointed cone are formed in the pointed cone part of the liquid inlet pipeline II; the handle is fixedly connected with the injector through the two annular lock catches, the injector is connected with one end of the first liquid inlet pipeline, and the other end of the first liquid inlet pipeline is in butt joint with the second liquid inlet pipeline at the conversion connector. The handle is provided with a multidirectional striking piece and a fixing device, and the multidirectional striking piece is locked through the fixing device. The instrument can inject a medicine for promoting cartilage repair into subchondral bones while completing a micro-fracture surgery operation, so that the operation process is simplified, the surgery effect is improved, and the pain of a patient and the infection risk are reduced.

Description

Technical Field

[0001] The utility model relates to the field of orthopedic surgical instruments, in particular to an instrument for microfracture surgery and subchondral bone injection. Background Art

[0002] Osteoarthritis, such as cartilage damage and arthritis, has become a key factor leading to joint dysfunction and chronic pain worldwide. Microfracture surgery is a commonly used procedure in clinical practice to treat joint diseases and promote cartilage repair, also known as bone marrow stimulation. This surgery uses a special microfracture instrument to form tiny channels in the damaged cartilage, so that blood clots containing bone marrow mesenchymal stem cells in the medullary cavity gather at the site of cartilage damage to promote the regeneration of cartilage tissue. During the operation, the doctor needs to strike the microfracture instrument to ensure that the sharp cone can make a hole in the cartilage surface.

[0003] At present, microfracture surgical instruments have certain limitations. Existing instruments are generally composed of a handle, a connecting rod, a pointed cone and other parts, and the angle between the long axis of the pointed cone and the long axis of the connecting rod is fixed and cannot be adjusted. Due to the anatomical differences in different joint structures of the human body, when doctors tap the microfracture instrument to make holes during surgery, the same instrument with a fixed pointed cone angle is often difficult to adapt to all situations, especially it cannot ensure that the pointed cone remains perpendicular to the cartilage surface. Moreover, tapping and drilling in an oblique direction will transmit the impact force, causing unnecessary damage to the cartilage outside the drilling area, and even affecting the surgical effect.

[0004] In addition, studies have confirmed that injecting stem cells, platelet-rich plasma and other drugs into the subchondral bone after microfracture surgery can achieve better therapeutic effects than simple microfracture surgery. However, subchondral bone injection currently needs to be performed in an operating room, lacks specific surgical instruments, and often requires another puncture and injection with a syringe after microfracture surgery. The operation steps are cumbersome and easily increase the risk of infection.

[0005] Therefore, there is an urgent need to design a microfracture instrument that can be used for different joint conditions and has sharp cones at different angles. It can also integrate microfracture and subchondral bone injection, simplify the operation steps, better facilitate doctors, and benefit patients. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an instrument for microfracture surgery and subchondral bone injection to simplify the operating steps of microfracture surgery.

[0007] To achieve the above purpose, the technical solution of the utility model is as follows:

[0008] An instrument for microfracture surgery and subchondral bone injection, comprising a handle and a front end portion, wherein the front end portion comprises a conversion interface, a connecting rod, a second liquid inlet pipe, an injection hole, and a pointed cone; the front end of the handle is threadedly connected to the conversion interface, the conversion interface is fixedly connected to the connecting rod, the front end of the connecting rod is fixedly connected to the pointed cone portion, a second liquid inlet pipe is arranged inside the connecting rod, and the second liquid inlet pipe is provided at the pointed cone portion with an injection hole running in the same direction as the pointed cone;

[0009] The handle is fixedly connected to the syringe via two annular lock buckles, the syringe is connected to one end of the first liquid inlet pipe, and the other end of the first liquid inlet pipe is butt-jointed with the second liquid inlet pipe at the conversion interface;

[0010] The handle is provided with a multi-directional striking piece and a fixing device. The multi-directional striking piece is formed by integrally welding a multi-directional striking head, a striking rod and a base. The base is fixedly connected to the handle, and the multi-directional striking piece is locked by the fixing device.

[0011] Furthermore, the included angle between the multi-directional striking member and the connecting rod is angle α, the included angle between the connecting rod and the pointed cone portion is angle β, and angle β is equal to angle α.

[0012] Furthermore, the β angle is 30°, 60° or 90°.

[0013] The beneficial effects of the utility model are: the instrument adopts a replaceable sharp cone design, and only the front end part of the handle part needs to be replaced to achieve the sharp cone drilling effect of different angles, while ensuring the consistency of the striking force line and the drilling force line, avoiding lateral adverse cutting force. Another feature of the instrument is that it can inject drugs that promote cartilage repair into the subchondral bone while completing the microfracture operation, simplifying the operation process, improving the surgical effect, and reducing the patient's pain and risk of infection.

[0014] First, the instrument innovatively adopts a replaceable pointed cone design. The surgeon can easily achieve various angles of drilling by simply replacing the front-end component in the handle. This design not only ensures that the striking force line and the drilling force line are perfectly aligned, but also effectively eliminates the generation of lateral adverse cutting force.

[0015] Secondly, another highlight of the utility model is that the device can inject cartilage repair-promoting drugs into the subchondral bone while performing microfracture surgery. This feature not only greatly simplifies the surgical process, but also significantly improves the surgical effect, thereby effectively alleviating the patient's pain and reducing the potential infection risk caused by multiple punctures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the structure diagram of the utility model and the front-end replacement structure diagram;

[0017] Figure 2 This is the structural diagram of the utility model when β=30°;

[0018] Figure 3 This is the structural diagram of the utility model when β=60°;

[0019] Figure 4 This is the structural diagram of the utility model when β=90°;

[0020] Among them, there are a handle 1, a multi-directional striking piece 2, a fixing device 3, a syringe 4, an annular lock 5, a liquid inlet pipe 1 6, a conversion interface 7, a connecting rod 8, a liquid inlet pipe 2 9, an injection hole 10, and a pointed cone 11. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0022] The utility model relates to an instrument for microfracture surgery and subchondral bone injection, such as Figure 1 As shown,

[0023] A device for microfracture surgery and subchondral bone injection, comprising a handle 1 and a front end portion, wherein the front end portion comprises a conversion interface 7, a connecting rod 8, a liquid inlet pipe 9, an injection hole 10, and a pointed cone 11; the front end of the handle 1 is threadedly connected to the conversion interface 7, the conversion interface 7 is fixedly connected to the connecting rod 8, the front end of the connecting rod 8 is fixedly connected to the pointed cone 11, a liquid inlet pipe 9 is arranged inside the connecting rod 8, and the liquid inlet pipe 9 is provided at the pointed cone 11 with four injection holes 10 running in the same direction as the pointed cone;

[0024] The handle 1 is fixedly connected to the syringe 4 through two annular lock buckles 5, and the syringe 4 is connected to one end of the liquid inlet pipe 1 6, and the other end of the liquid inlet pipe 1 6 is precisely connected to the liquid inlet pipe 2 9 at the conversion interface 7 to ensure smooth flow of liquid;

[0025] The handle 1 is provided with a multi-directional striking piece 2 and a fixing device 3. The multi-directional striking piece 2 is formed by integrally welding a multi-directional striking head, a striking rod and a base. The base is fixedly connected to the handle 1. The multi-directional striking piece 2 is locked by the fixing device 3.

[0026] The included angle between the multi-directional striking member 2 and the connecting rod 8 is angle α, and the included angle between the connecting rod 8 and the pointed cone 11 is angle β, which is equal to angle α.

[0027] The β angle is 30°, 60° or 90°.

[0028] When the utility model is in use, routine disinfection and drape laying are performed, and the doctor evaluates the condition of the surgical joint and adjusts the multi-directional striking piece 2. The angle formed by the long axis of the striking head, the striking rod and the long axis of the connecting rod 8 is marked as angle α, and the angle α can be adjusted (30 degrees, 60 degrees, 90 degrees) by the elliptical base of the multi-directional striking piece 2. After adjustment, it is fixed and locked by the fixing device 3. The angle between the long axis of the connecting rod 8 and the long axis of the pointed cone part is angle β. The front end of the handle 1 part can be replaced by disassembling the conversion interface 7 to replace the entire front end part except the handle, and the pointed cone 11 can be at multiple angles (30 degrees, 60 degrees, 90 degrees) with the connecting rod 8, which can be selected for quick installation, such as Figure 2 , Figure 3 , Figure 4 The diagram shows the structure after the entire front end portion is replaced. After the adjustment is completed, the front end portion that matches the multi-directional striking member 2 is selected and installed.

[0029] During the operation, the doctor holds the handle 1 in one hand and uses a bone hammer (a structure well known to those skilled in the art) in the other hand to hit the striking head of the multi-directional striking piece 2, and the striking force is transmitted along the striking head to the entire multi-directional striking piece 2. After the striking, the striking force is transmitted along the multi-directional striking piece to the connecting rod 8. There is an angle α between the long axis of the striking piece part 2 and the long axis of the connecting rod 8, and there is an angle β between the long axis of the pointed cone 11 on the other side of the connecting rod and the long axis of the connecting rod. Since the angles α and β are the same, this ensures that the direction of the striking force is completely consistent with the direction of the pointed cone. Therefore, during the drilling process, the direction of the pointed cone will not deviate, eliminating the influence of lateral shear force.

[0030] Then, the syringe 4 is fixed with the annular lock 5 so that it fits firmly on the handle. The doctor pushes the syringe so that the medicine in the syringe can enter the liquid inlet pipe 2 9 along the liquid inlet pipe 1 6, and finally completes the uniform injection of the medicine in the subchondral bone area at the injection hole 10. The operation is completed, the patient's condition is evaluated, and the doctor returns to the ward.

Claims

1. An instrument for microfracture surgery and subchondral bone injection, comprising a handle (1) and a front end portion, characterized in that: The front end portion comprises a conversion interface (7), a connecting rod (8), a second liquid inlet pipe (9), an injection hole (10), and a pointed cone (11); the front end of the handle (1) is threadedly connected to the conversion interface (7), the conversion interface (7) is fixedly connected to the connecting rod (8), the front end of the connecting rod (8) is fixedly connected to the pointed cone (11), a second liquid inlet pipe (9) is arranged inside the connecting rod (8), and the second liquid inlet pipe (9) is provided with four injection holes (10) at the pointed cone (11) with the direction being consistent with the direction of the pointed cone; The handle (1) is fixedly connected to the syringe (4) via two annular lock buckles (5); the syringe (4) is connected to one end of the first liquid inlet pipe (6); and the other end of the first liquid inlet pipe (6) is butt-jointed with the second liquid inlet pipe (9) at the conversion interface (7); The handle (1) is provided with a multi-directional striking piece (2) and a fixing device (3); the multi-directional striking piece (2) is formed by integrally welding a multi-directional striking head, a striking rod and a base; the base is fixedly connected to the handle (1); and the multi-directional striking piece (2) is locked by the fixing device (3).

2. The apparatus for microfracture surgery and subchondral bone injection according to claim 1, characterized in that: The included angle between the multi-directional striking member (2) and the connecting rod (8) is angle α, and the included angle between the connecting rod (8) and the pointed cone (11) is angle β, which is equal to angle α.

3. The apparatus for microfracture surgery and subchondral bone injection according to claim 2, characterized in that: The β angle is 30°, 60° or 90°.

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