A bone grafting funnel device

Abstract

The utility model relates to a kind of bone grafting funnel devices, including bone grafting funnel, the bone grafting funnel includes funnel and round pipe, the upper portion of the round pipe is connected with the lower portion of the funnel;It further includes guide needle, the guide needle includes needle body of strip, the needle body one end has needle tip;It further includes funnel sleeve core, the funnel sleeve core includes pipe body of strip, the one end of the pipe body with the funnel cooperation is conical bucket, the one end of the pipe body with the guide needle cooperation has core hole;Beneficial effect lies in: the funnel sleeve core can be filled between the bone grafting funnel and the guide needle, so that the bone grafting funnel is accurately aligned along the guide needle to the injured vertebra, to avoid the bone grafting funnel directly sleeved on the guide needle occurs inclination.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a bone implantation funnel device. Background Technology

[0002] Thoracolumbar vertebral fractures are a common type of fracture in clinical practice. The most common surgical treatment is pedicle screw fixation. In the past, the surgery often required a posterior midline approach, extensive dissection of the paraspinal muscles, and then pedicle screw fixation through the adjacent vertebral bodies above and below the injured vertebra. For patients with severe compression of the injured vertebra, it is usually necessary to implant autologous or allogeneic bone into the vertebral body through the pedicle.

[0003] In minimally invasive surgery, the bone graft funnel needs to be guided to the appropriate position and depth by a guide needle to ensure that bone fragments are implanted at the injured vertebra and improve surgical outcomes. However, the existing guide needle has a diameter of 1.5 mm, while the inner diameter of the bone graft funnel is 3.0 mm. When the bone graft funnel is fitted onto the guide needle, there is a 1.5 mm gap between the inner diameter of the bone graft funnel and the guide needle. Due to this gap, the bone graft funnel may not be accurately aligned with the injured vertebra, and the bone fragments may not be accurately inserted into the injured vertebra, resulting in a longer healing and recovery time for the patient. In order to improve surgical precision and ensure that the bone graft funnel is accurately aligned with the injured vertebra, further measures are needed.

[0004] In view of the above, it is necessary to propose a bone implantation funnel device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a bone graft funnel device.

[0006] To achieve the above objectives, the technical solution of this utility model is to design a bone graft funnel device, characterized in that it includes: a bone graft funnel, wherein the bone graft funnel comprises a funnel and a circular tube, the upper part of the circular tube being connected to the lower part of the funnel. It also includes a guide needle, which comprises a long, needle-like body with a needle tip at one end; It also includes a funnel core, which includes a long tube, one end of which is conical and the other end of which is cooperating with the funnel has a core hole.

[0007] A further preferred technical solution is that the outer cylindrical diameter of the funnel sleeve core tube is 2.8 mm; and the inner diameter of the core hole of the funnel sleeve core is 1.8 mm.

[0008] In a further preferred embodiment, the core hole of the funnel sleeve penetrates the funnel sleeve body along the axial direction.

[0009] In a further preferred embodiment, the outer periphery of the tube at the end of the funnel sleeve that mates with the guide needle has an outer conical surface.

[0010] A further preferred technical solution is that the conical hopper of the funnel sleeve abuts against the funnel at the upper end of the circular tube.

[0011] The advantages and beneficial effects of this utility model are as follows: the funnel core can be filled between the bone graft funnel and the guide needle, so that the bone graft funnel is accurately aligned with the injured vertebra along the guide needle, and the bone graft funnel is avoided from tilting when directly fitted onto the guide needle. The bone graft funnel device is simple in structure, convenient to use, and precise in operation. This design achieves minimally invasive bone grafting through the cooperation of the puncture component and the bone graft component. Based on minimally invasive spinal surgery techniques, the bone graft funnel is quickly and accurately placed into the pedicle through the guidance of the puncture component. This enables minimally invasive bone grafting after percutaneous pedicle screw fixation in thoracolumbar fracture surgery. It not only achieves the effect of fully filling the fractured vertebral body and enhancing the support capacity of the anterior and middle columns of the spine after spinal fracture, but also greatly shortens the operation time, reduces surgical trauma, and improves the surgical outcome. Attached Figure Description

[0012] Figure 1 This is the front view of the present utility model; Figure 2 This is a view of the bone graft funnel of this utility model; Figure 3 This is a view of the funnel sleeve core of this utility model; Figure 4 This is a view of the guide pin of this utility model; In the diagram: 10, bone graft funnel; 20, funnel core; 30, guide needle; 11. Funnel; 12. Round tube; 21. Pipe body; 22. Cone bucket; 23. Outer cone surface; 31. Needle-like body; 32. Needle tip. Detailed Implementation

[0013] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0014] In minimally invasive spinal surgery, the pedicle of the injured vertebra is first punctured through a puncture device. After the puncture needle is removed from the puncture sleeve, a guide needle 30 is inserted through the puncture sleeve. The puncture sleeve is then removed, and a tap is screwed in along the direction of the guide needle 30. After confirming the position and depth of the guide needle 30 under fluoroscopy, the tap is withdrawn, and the guide needle 30 is kept stationary. The bone graft funnel 10 is then screwed in along the direction of the guide needle 30. After confirming the position and depth of the bone graft funnel under fluoroscopy again, the guide needle 30 is withdrawn. Bone fragments are implanted through the bone graft funnel 10. A bone graft pusher is inserted into the round tube of the bone graft funnel to compact the bone fragments. After confirming under fluoroscopy that there is sufficient bone graft, increased density at the fracture site, and restored vertebral height, the bone graft funnel 10 is withdrawn, completing the bone grafting operation and achieving minimally invasive bone grafting.

[0015] During surgery, the bone graft funnel 10 needs to be guided to the appropriate position and depth by a guide needle to ensure that bone fragments are implanted at the injured vertebra and improve the surgical outcome. However, the existing guide needle 30 has a diameter of 1.5 mm, while the inner diameter of the bone graft funnel 10 is 3.0 mm. When the bone graft funnel 10 is fitted onto the guide needle 30, there is a 1.5 mm gap between the inner diameter of the bone graft funnel 10 and the guide needle 30. Due to this gap, the bone graft funnel 10 may not be accurately aligned with the injured vertebra, and the bone fragments may not be accurately inserted into the injured vertebra, resulting in a longer healing and recovery time for the patient. In order to improve surgical precision and ensure that the bone graft funnel 10 is accurately aligned with the injured vertebra, this application provides a bone graft funnel device.

[0016] like Figure 1-4 As shown, the bone grafting funnel device includes a bone grafting funnel 10, which includes a funnel 11 and a round tube 12. The upper part of the round tube 12 is connected to the lower part of the funnel 11. The bone fragments can be collected in the upper part of the round tube 12 through the funnel 11 and then guided to the injured vertebral position through the round tube 12.

[0017] It also includes a guide needle 30, which includes a long, needle-like body 31 with a needle tip 32 at one end. The guide needle 30 can be pre-implanted into the pedicle of the injured vertebra to guide the bone graft funnel 10 to be aligned with the injured vertebra to a suitable position and depth.

[0018] It also includes a funnel core 20, which includes a long tube 21. One end of the tube 21 that mates with the funnel 11 is a conical hopper 22, and the other end of the tube 21 that mates with the guide needle 30 has a core hole. The tube of the funnel core 20 is inserted into the round tube 12 of the bone graft funnel 10, and the conical hopper 22 of the funnel core 20 abuts against the funnel 11 at the upper end of the round tube 12. The funnel core 20 is fitted onto the guide needle 30. The funnel core 20 can fill the space between the bone graft funnel 10 and the guide needle 30, so that the bone graft funnel 10 is accurately aligned with the injured vertebra along the guide needle 30, avoiding tilting of the bone graft funnel 10 when it is directly fitted onto the guide needle 30.

[0019] The outer cylindrical diameter of the funnel core 20 is 2.8 mm; the inner diameter of the core hole of the funnel core 20 is 1.8 mm. Thus, the gap between the funnel core 20 and the inner tube 12 is 0.2 mm. Even if the tube of the funnel core 20 is inserted into the inner tube 12 of the bone graft funnel 10, the bone graft funnel 10 can be prevented from tilting along the funnel core 20. The gap between the funnel core 20 and the guide needle 30 is 0.3 mm. Even if the funnel core 20 can be fitted onto the guide needle 30 and moved, the funnel core 20 can be prevented from tilting. This allows the bone graft funnel 10 to be accurately aligned with the injured vertebra along the guide needle 30.

[0020] The core hole of the funnel sleeve 20 penetrates the body along the axial direction, so that the funnel sleeve 20 can be completely fitted onto the guide needle 30 and close to the injured vertebra, so that the bone graft funnel 10 can be more accurately aligned with the injured vertebra.

[0021] The outer periphery of the tube 21 at one end of the funnel core 20 that mates with the guide needle 30 has an outer conical surface 23, which has a guiding function. The funnel core 20 is fitted onto the guide needle 30 and close to the injured vertebra. The outer conical surface 23 of the funnel core 20 fits into the injured vertebra, so that the funnel core 20 is accurately aligned with the injured vertebra. Thus, the bone graft funnel 10 is accurately aligned with the injured vertebra along the guide needle 30.

[0022] The funnel sleeve 20 has a conical hopper 22 on the tube body at one end that mates with the round tube 12. The conical hopper 22 can abut against the funnel 11 at the upper end of the round tube 12. In this way, the funnel sleeve 20 and the bone graft funnel 10 have a relatively fixed mating length. By tapping the conical hopper 22 of the funnel sleeve 20, the bone graft funnel 10 can be pressed and moved synchronously, accurately aligning with the injured vertebra along the guide needle. To facilitate the placement of the bone graft funnel 10 into the pedicle, a handle is provided on one side of the bone graft funnel 10, and the handle and the bone graft funnel 10 are an integrated structure.

[0023] The use of the bone grafting infundibulum device in conjunction with vertebral surgery is described in detail. The pedicle of the injured vertebra is punctured through a puncture assembly, which includes a puncture needle and a puncture sleeve. The puncture needle comprises a first needle-like body in the shape of a long strip, with a first handle at its upper part. The puncture sleeve includes a cylindrical sleeve for inserting the first needle-like body, with a second handle at its upper part. The second handle has a through hole for inserting the first needle-like body. The puncture needle is inserted into the puncture sleeve... After removal, the guide needle 30 is inserted through the puncture sleeve, and then the puncture sleeve is removed. To ensure the effectiveness of the puncture assembly, the puncture needle and the puncture sleeve are detachably connected. The second handle has a groove in the middle, and a cylindrical protrusion in the middle of the groove. A through hole is set in the middle of the cylindrical protrusion. An external thread is provided on the outer circumference of the cylindrical protrusion. The lower part of the first handle has an annular protrusion that surrounds the outside of the first needle-like body. An internal thread matching the external thread is provided on the inner wall of the annular protrusion.

[0024] The insertion of the guide pin 30 can be achieved by a tap; the tap includes a first straight rod with a circular cross-section, a third handle at the upper part of the first straight rod, the diameter of the lower part of the first straight rod gradually decreasing from top to bottom, a first thread on the outer surface of the lower part of the first straight rod, and the third handle including a block-shaped body, the first straight rod being fixed to the middle of the block-shaped body, the length of the block-shaped body being greater than the width of the block-shaped body, the upper surface of the block-shaped body being curved, and the thickness of the block-shaped body gradually increasing from both sides to the middle, so that the third handle fits the palm of the operator, making it easy for the operator to turn the tap and insert the guide pin 30.

[0025] The vertebral body is enlarged using a flaring tool, and then a bone graft funnel 10 with a funnel core 20 is inserted. The cone 22 of the funnel core 20 is gently tapped until the anterior third of the vertebral body is reached. The funnel core 20 and guide needle 30 are then removed, and bone grafting is performed.

[0026] Bone grafting is performed using a bone grafting pusher, which includes a second straight rod with a circular cross-section and a fourth handle at the upper part of the second straight rod. Bone fragments are implanted through a bone grafting funnel, and the bone fragments are compacted by inserting the bone grafting pusher into the circular tube of the bone grafting funnel.

[0027] The bone graft funnel device has a simple structure, is easy to use, and is precise to operate. This design achieves minimally invasive bone grafting through the cooperation of the puncture component and the bone graft component. Based on minimally invasive spinal surgery techniques, the bone graft funnel 10 is quickly and accurately placed into the pedicle through the puncture component. This enables minimally invasive bone grafting after percutaneous pedicle screw fixation in thoracolumbar fracture surgery. It not only achieves the effect of fully filling the fractured vertebral body and enhancing the support capacity of the anterior and middle columns of the spine after spinal fracture, but also greatly shortens the operation time, reduces surgical trauma, and improves the surgical outcome.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A bone implantation funnel device, characterized in that, include: A bone grafting funnel, comprising a funnel and a circular tube, wherein the upper part of the circular tube is connected to the lower part of the funnel. It also includes a guide needle, which comprises a long, needle-like body with a needle tip at one end; It also includes a funnel core, which includes a long tube, one end of which is conical and the other end of which is cooperating with the funnel has a core hole.

2. The bone implantation funnel device according to claim 1, characterized in that, The outer cylindrical diameter of the funnel sleeve core tube is 2.8 mm; the inner diameter of the core hole of the funnel sleeve core is 1.8 mm.

3. The bone implantation funnel device according to claim 1 or 2, characterized in that, The core hole of the funnel sleeve penetrates the funnel sleeve body along the axial direction.

4. The bone implantation funnel device according to claim 1, characterized in that, The outer periphery of the tube at one end of the funnel sleeve that mates with the guide needle has an outer conical surface.

5. The bone implantation funnel device according to claim 1, characterized in that, The conical hopper of the funnel sleeve abuts against the funnel at the upper end of the circular tube.

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