Bone cement injection device

Abstract

The invention relates to the technical field of medical instruments, in particular to a bone cement injection device which comprises a pushing needle, the pushing needle is sleeved with a puncture needle, the pushing needle is in sliding fit with the puncture needle, and a plurality of liquid injection holes are formed in the side wall of the bottom of the puncture needle in the circumferential direction of the puncture needle; the bottom of the puncture needle is fixedly connected with a fan-shaped baffle; the puncture needle is sleeved with a support, and the support is in sliding fit with the puncture needle. A plurality of liquid injection holes are formed in the side wall of the bottom of the puncture needle, and meanwhile, a fan-shaped baffle is arranged at the bottom, so that bone cement is injected into a bone cavity from the hole formed in the side face of the puncture needle, the dispersivity of the bone cement in a bone is improved, complex gaps and irregular areas in the bone can be better filled, and the bone fracture resistance is improved. And the filling effect in the skeleton is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a bone cement injection device. Background Art

[0002] In the field of orthopedic surgery, percutaneous vertebroplasty (PVP) and percutaneous kyphoplasty (PVK) for vertebral osteoporotic fractures widely use bone cement injection technology to repair bone damage and enhance bone support, thereby achieving the goal of alleviating patients' pain after vertebral fractures.

[0003] Traditional bone cement injection devices usually use a straight-cylinder pusher, which has significant disadvantages when used. The bone cement of the straight-cylinder pusher can only flow out from a single outlet at the bottom, which results in poor diffusion of the bone cement during the injection process. Since the liquid can only be discharged from the bottom, it is difficult for the bone cement to be evenly dispersed to the target area, and the filling effect formed inside the bone is poor, which affects the overall effect of bone repair. In PVP / PKP surgery, unsatisfactory bone cement filling may lead to unbalanced recovery of bone strength in different areas inside the fractured vertebral body, and uneven load bearing when the vertebral body is subjected to stress load, which may cause the patient to still have pain or secondary vertebral collapse risks after surgery; therefore, uneven bone cement distribution seriously affects the clinical treatment effect of vertebroplasty, is not conducive to patient recovery, and may even cause complications such as vertebral re-fracture in the long term.

[0004] To sum up, how to solve the problem that the bone cement of the straight-cylinder pushing device can only flow out from a single position at the bottom, resulting in poor diffusion of the bone cement during the injection process, making it difficult to evenly disperse to the target area, and thus forming a poor filling effect inside the bone, affecting the overall effect of bone repair has become a difficult problem that needs to be solved urgently in this field. Therefore, it is necessary to propose an improved bone cement injection device. Summary of the Invention

[0005] To solve the above problems, the present invention provides a bone cement injection device for optimizing the liquid outlet design of the push needle, which can promote the multi-directional and uniform diffusion of bone cement during injection, ensuring that during PVP and PVK operations, bone cement can be accurately and fully filled into various key parts of the fractured vertebrae, thereby improving the success rate of the operation, reducing the occurrence of postoperative complications, and bringing better treatment effects to patients.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a bone cement injection device includes a pushing needle, a puncture needle is connected to the outer shell of the pushing needle, the pushing needle and the puncture needle are slidably matched, and a plurality of injection holes are opened on the side wall of the bottom of the puncture needle along its circumference; a fan-shaped baffle is fixedly connected to the bottom of the puncture needle.

[0007] The technical principles of the above solution are as follows:

[0008] The needle's bottom sidewall features several injection holes, combined with a fan-shaped baffle integral to the base. During bone cement injection, the needle pushes the cement inside the needle out through the injection holes. Because the fan-shaped baffle blocks half of the needle's bottom, some cement is forced to flow out through the injection holes on the side of the needle, allowing it to spread evenly around the needle.

[0009] The above scheme has the following beneficial effects:

[0010] The side openings and fan-shaped baffles on the bottom of the puncture needle shift the traditional single outflow of bone cement to a more even diffusion from the side injection holes, improving its diffusion within the bone. This even distribution of bone cement can better fill complex gaps and irregular areas within the bone, significantly enhancing its filling effect.

[0011] Furthermore, scale lines are engraved on the side wall of the push needle.

[0012] Beneficial effects: Medical staff can control the pushing amount of the push needle by observing the scale line according to the specific demand for the amount of bone cement in the surgical site.

[0013] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an axonometric view of the push needle in the bone cement injection device of the present invention.

[0015] Figure 2 This is an axonometric view of the puncture needle in the bone cement injection device of the present invention.

[0016] Figure 3 for Figure 2 Enlarged view of part A.

[0017] The reference numerals in the drawings of the specification include: 1. push needle; 2. puncture needle; 3. injection hole; 4. baffle. DETAILED DESCRIPTION

[0018] The following is further described in detail through specific implementation methods:

[0019] As attached Figure 1-Figure 3 As shown: A bone cement injection device includes a pushing needle 1, which is outer-mounted with a puncture needle 2. The pushing needle 1 and the puncture needle 2 are slidably matched. A plurality of injection holes 3 are opened on the side wall of the bottom of the puncture needle 2 along its circumference; a fan-shaped baffle 4 is integrally formed at the bottom of the puncture needle 2.

[0020] There are scale lines engraved on the side wall of the push needle 1.

[0021] The specific implementation process is as follows:

[0022] Straight-tube bone cement injection devices only allow for flow from a single location at the bottom, resulting in poor diffusion of the bone cement during injection. This limited flow makes it difficult for the bone cement to be evenly distributed across the target area, resulting in poor filling within the bone and impacting the overall effectiveness of bone repair.

[0023] During PVP and PVK surgeries, when bone cement injection is required, the puncture needle 2 is inserted into the stirred bone cement, and the bone cement can be sucked into the puncture needle 2 by pulling the push needle 1 .

[0024] Next, the puncture needle 2 is inserted into the target position of the patient's vertebral body, and then the push needle 1 is pushed so that the bone cement in the puncture needle 2 is injected into the patient's vertebral body.

[0025] The multiple injection holes 3 formed on the bottom side wall of the puncture needle 2 cooperate with the fan-shaped baffle 4 integrally formed at the bottom. During the bone cement injection process, the push needle 1 pushes the bone cement inside the puncture needle 2 out of the injection holes 3. Since the fan-shaped baffle 4 blocks half of the bottom area of the puncture needle 2, a portion of the bone cement is forced to flow out of the injection holes 3 on the side of the puncture needle 2, so that the bone cement can be evenly diffused in all directions after flowing out of the injection holes 3. At the same time, by rotating the puncture needle 2, the injection angle and direction of the injection holes 3 can be flexibly adjusted to achieve injection in three-dimensional space, which can better fill the complex gaps and irregular areas inside the bone, significantly enhance the filling effect inside the bone, and improve the diffusion of bone cement inside the bone.

[0026] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A bone cement injection device, comprising a push needle (1), characterized in that: The push needle (1) is outer-mounted with a puncture needle (2), the push needle (1) and the puncture needle (2) are slidably matched, and a plurality of injection holes (3) are opened on the side wall of the bottom of the puncture needle (2) along its circumference; a fan-shaped baffle (4) is fixedly connected to the bottom of the puncture needle (2).

2. The bone cement injection device according to claim 1, characterized in that: The side wall of the push needle (1) is engraved with scale lines.

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