Bone grafting device for open lumbar interbody fusion

Abstract

The utility model discloses a bone grafting device for open lumbar intervertebral fusion, which comprises a bone grafting funnel and a push rod, and the push rod can be inserted into a catheter to push bone grains in the catheter into intervertebral space and compact the bone grains so as to complete bone grafting. The bone grafting funnel comprises a catheter and a funnel groove, the catheter is through in the length direction, and the cross section of the catheter is rectangular, so that an exposed intervertebral space bone grafting inlet in an operation is fully utilized; the funnel groove is fixed at one end of the conduit along the length direction, an outlet of the funnel groove is communicated with the conduit, and an inlet of the funnel groove is exposed; the funnel groove is in a long and narrow groove shape, so that the funnel groove can be conveniently held by a hand in the process of pushing the push rod, particularly knocking the push rod to assist in pushing the push rod, the stability of the funnel groove is improved, and the funnel groove is prevented from shifting; the funnel grooves are symmetrically formed in the two sides of the catheter, balanced counterforce can be provided, the push rod can stably push bone grains into the intervertebral space, and the beneficial effects that the operation is convenient, the efficiency is high, and the safety is high are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a bone grafting device for open lumbar interbody fusion surgery. Background Art

[0002] Open lumbar fusion is a surgical method for treating lumbar diseases. Its main purpose is to remove the diseased intervertebral disc and other tissues, and implant bone tissue (bone particles) between the vertebral bodies or use an internal fixation device to restore the stability of the lumbar spine, thereby alleviating the patient's pain and other related symptoms. Currently, clinically, open lumbar fusion is still the gold standard for the treatment of many lumbar diseases (such as lumbar spondylolisthesis, severe lumbar disc herniation, etc.), and plays a crucial role in lumbar spine surgery.

[0003] In posterior open lumbar surgery, after discectomy and decompression, clinically, a bone grafting funnel is used in cooperation with a solid metal push rod to send a certain amount of bone particles into the decompressed lumbar intervertebral space, and then an interbody fusion cage is placed to complete the interbody bone grafting operation. The bone grafting funnel includes a funnel mouth and a metal tube communicating with the funnel mouth, and the metal tube is a circular tube with a circular cross-section. The metal tube is inserted into the operation entrance of the intervertebral vertebra to introduce the bone particles.

[0004] However, the applicant found that after discectomy, the exposed operation entrance of the intervertebral vertebra is usually the posterolateral of the intervertebral space. This entrance is rectangular, and its size can usually reach 1.2 cm × 1.5 cm. And during the placement of the fusion cage, since the intervertebral space can be further expanded, this operation entrance can be further enlarged. The diameter of the above metal rod is usually about 0.8 cm, and obviously, the bone grafting entrance of the exposed intervertebral space during the operation is not fully utilized.

[0005] In addition, the inner diameter of the metal rod is smaller, about 0.6 cm, and the cross-sectional area is 0.28 cm 2 ². The bone grafting particles are autologous bone or allogeneic bone with a diameter of about 0.5 cm. Therefore, the channel for the bone grafting particles is very narrow. During the bone grafting process, the bone particles barely pass through the hollow metal rod, and are easily stuck. It is necessary to use the push rod to send the bone particles into the intervertebral space in small amounts multiple times, resulting in the bone grafting process usually taking more than 10 minutes, which is time-consuming and laborious, and the efficiency is very low.

[0006] In addition, the current funnel mouth is arranged on one side of the metal tube. When knocking the push rod to send the bone aggregate into the intervertebral space, it is easy to be uneven in force, affecting the stability.

[0007] Therefore, the above prior art has at least the following technical problems: The device for sending bone particles into the intervertebral space in open lumbar fusion in the prior art is time-consuming and laborious, with low efficiency and insufficient stability. Summary of the Utility Model

[0008] The embodiment of the present application provides a bone grafting device for open lumbar intervertebral fusion surgery, thereby solving the technical problems in the prior art that the device used to deliver bone particles into the intervertebral space in open lumbar intervertebral fusion surgery is time-consuming, labor-intensive, inefficient and lacks stability.

[0009] In order to solve the above technical problems, in a first aspect, an embodiment of the present application provides a bone grafting device for open lumbar intervertebral fusion surgery, the bone grafting device comprising:

[0010] A bone grafting funnel, the bone grafting funnel comprises a catheter and a funnel groove, wherein: the catheter is through along the length direction, and the cross-sectional shape of the catheter is rectangular; the funnel groove is fixed on one end of the catheter along the length direction, the outlet of the funnel groove is connected to the catheter, and the inlet of the funnel groove is exposed; the funnel groove is in the shape of a narrow and long groove, and the funnel grooves are symmetrically arranged on both sides of the catheter;

[0011] A push rod can be inserted into the catheter to push the bone particles in the catheter into the intervertebral space and compact them, thereby completing bone grafting.

[0012] Furthermore, the catheter is provided with a handle for holding by hand.

[0013] Furthermore, the handle is configured with grooves for fingers to engage.

[0014] Furthermore, the outer wall of the funnel groove is ergonomically curved to be suitable for single-handed holding.

[0015] Furthermore, anti-slip patterns are arranged on the outer wall of the funnel groove.

[0016] Furthermore, the push rod includes a push rod for inserting into the catheter, and a holding rod fixedly arranged on one end of the push rod, the push rod is vertically connected to the holding rod, and the holding rods are symmetrically arranged on both sides of the holding rod.

[0017] Furthermore, the holding rod is a round rod, and a striking plane is configured on the top surface of the holding rod to facilitate striking.

[0018] Furthermore, a clamping block is arranged on the top surface of the holding rod, the bottom surface of the clamping block is fixed on the top surface of the holding rod, and the top surface of the clamping block is a horizontal plane, thereby constituting the striking plane.

[0019] Furthermore, the cross-sectional shape of the pushing rod is rectangular to adapt to the catheter.

[0020] Furthermore, the cross-sectional dimensions of the catheter are 1 cm×0.8 cm.

[0021] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0022] In the embodiments of the present application, bone particles are introduced through a bone grafting funnel, and at the same time, a pushing rod is provided to push the bone particles in the catheter into the intervertebral space and compact them, thereby completing bone grafting; wherein:

[0023] The cross-sectional shape of the catheter is rectangular, which can be adapted to the shape of the operating entrance of the intervertebral vertebra, so as to make full use of the bone grafting entrance of the intervertebral space exposed during the operation, increase the bone grafting operation space, expand the passing area of the bone particles, and avoid the jamming of the bone particles in the catheter during the bone grafting process;

[0024] In addition, the funnel groove is in the shape of a long and narrow groove, which is convenient for holding the funnel groove by hand during the process of pushing the pushing rod, especially when knocking the pushing rod to assist the pushing of the pushing rod, so as to improve the stability of the funnel groove and avoid the displacement of the funnel groove;

[0025] In addition, the funnel grooves are symmetrically arranged on the left and right sides of the catheter. During the process of pushing the pushing rod, especially when knocking the pushing rod to assist the pushing of the pushing rod, a balanced counterforce can be provided, so that the pushing rod can smoothly push the bone particles into the intervertebral space, improving the accuracy and safety of the operation;

[0026] Therefore, the embodiments of the present application effectively solve the technical problems of the device for delivering bone particles into the intervertebral space in the existing open lumbar fusion surgery, such as time-consuming, laborious, low efficiency and insufficient stability, and achieve the beneficial effects of convenient operation, high efficiency and high safety in the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 Structural schematic diagram of a bone grafting funnel of a bone grafting device for open lumbar interbody fusion surgery in an embodiment of the present invention Figure 1 ;

[0029] Figure 2 Structural schematic diagram of a bone grafting funnel of a bone grafting device for open lumbar interbody fusion surgery in an embodiment of the present invention Figure 2 ;

[0030] Figure 3 Structural schematic diagram of a pushing rod of a bone grafting device for open lumbar interbody fusion surgery in an embodiment of the present invention Figure 1 ;

[0031] Figure 4 The structure of a push rod of a bone grafting device for open lumbar intervertebral fusion surgery in one embodiment of the utility model is schematically shown. Figure 2 ;

[0032] Figure 5 The structure of a bone grafting device for open lumbar intervertebral fusion in one embodiment of the utility model is shown in FIG. Figure 1 ;

[0033] Figure 6 The structure of a bone grafting device for open lumbar intervertebral fusion in one embodiment of the utility model is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0034] The embodiment of the present application provides a bone grafting device for open lumbar intervertebral fusion surgery, thereby solving the technical problems in the prior art that the device used to deliver bone particles into the intervertebral space in open lumbar intervertebral fusion surgery is time-consuming, labor-intensive, inefficient and lacks stability.

[0035] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] like Figures 1 to 6 As shown, one or more embodiments of the present application provide a bone grafting device for open lumbar intervertebral fusion surgery, the bone grafting device comprising:

[0037] The bone grafting funnel 100 comprises a conduit 110 and a funnel groove 120, wherein:

[0038] The conduit 110 is through in the length direction, and the cross-section of the conduit 110 is rectangular. The funnel groove 120 is fixed at one end of the conduit 110 in the length direction, and the outlet of the funnel groove 120 is connected to the conduit 110, and the inlet of the funnel groove 120 is exposed. The funnel groove 120 is in the shape of a long and narrow groove, and the funnel groove 120 is symmetrically arranged on both sides of the conduit 110;

[0039] The push rod 200 can be inserted into the catheter 110 to push the bone particles in the catheter 110 into the intervertebral space and compact them, thereby completing bone grafting.

[0040] As described above, in the embodiment of the present application, bone particles are introduced through the bone grafting funnel 100, and at the same time, the pushing rod 200 is provided to push the bone particles in the catheter 110 into the intervertebral space and compact them, thereby completing the bone grafting. Among them, the cross-sectional shape of the catheter 110 is rectangular, which can be adapted to the shape of the operation entrance of the intervertebral vertebra, so as to make full use of the bone grafting entrance of the intervertebral space exposed during the operation, increase the bone grafting operation space, expand the passing area of the bone particles, and avoid the jamming of the bone particles in the catheter 110 during the bone grafting process; in addition, the funnel groove 120 is in the shape of a long and narrow groove, which is convenient for holding the funnel groove 120 by hand during the process of pushing the pushing rod 200, especially when knocking the pushing rod 200 to assist the pushing rod 200 to push, so as to improve the stability of the funnel groove 120 and avoid the displacement of the funnel groove 120; in addition, the funnel groove 120 is symmetrically arranged on the left and right sides of the catheter 110, and during the process of pushing the pushing rod 200, especially when knocking the pushing rod 200 to assist the pushing rod 200 to push, it can provide a balanced counterforce, so that the pushing rod 200 can smoothly push the bone particles into the intervertebral space, improving the accuracy and safety of the operation, effectively solving the technical problems of time-consuming, laborious, low efficiency and insufficient stability of the device for sending bone particles into the intervertebral space in the existing open lumbar fusion surgery, and achieving the beneficial effects of convenient operation, high efficiency and high safety of the operation.

[0041] Further, the size of the cross-section of the catheter 110 is 1 cm × 0.8 cm.

[0042] Specifically, considering that the height of the intervertebral space varies from person to person, the cross-sectional size of the catheter 110 is reserved and designed to be 1 cm × 0.8 cm (that is, the length of the rectangle is 1 cm and the width is 0.8 cm), so as to make full use of the space of the operation entrance created during the operation as much as possible and leave some room to adapt to the vast majority of patients. In this way, the cross-sectional area of the catheter 110 can reach 0.8 cm 2 , which is 2.8 times that of the circular bone grafting channel, will greatly expand the passing area of the bone particles, avoid the jamming of the bone particles in the channel during the bone grafting process, and can effectively improve the bone grafting efficiency. Of course, the above cross-sectional size of the catheter 110 is only an example, and of course, it can also be other sizes, as long as it is suitable for the operation entrance created during the operation, and it is not limited here.

[0043] In an embodiment of the present application, as Figure 1 、 2 shown, a handle 111 for holding by hand is provided on the catheter 110.

[0044] Specifically, during the open lumbar interbody bone grafting surgery, it is necessary to hold the bone grafting funnel 100 by hand and insert the bone grafting funnel 100 into the intervertebral disc from which the nucleus pulposus has been removed. By providing a handle 111 on the catheter 110, the catheter 110 can be stably and comfortably grasped, ensuring that the bone grafting funnel 100 is inserted into the predetermined position and preventing the bone grafting funnel 100 from sinking along the intervertebral space during the hammering process, thereby improving the accuracy and safety of the surgery.

[0045] Further, still as Figure 1 、 2 shown, a groove 112 for fingers to dig into is formed on the handle 111.

[0046] Specifically, by providing the groove 112 on the handle 111, it is convenient for fingers to grip, so as to stably and comfortably grasp the catheter 110, ensure that the bone grafting funnel 100 is inserted into the predetermined position, and prevent the bone grafting funnel 100 from sinking along the intervertebral space during the hammering process, thereby improving the accuracy and safety of the surgery.

[0047] For example, the handle 111 can be a sleeve that is fixedly or detachably sleeved on one end of the catheter 110 near the funnel groove 120, the groove 112 is formed on the outer surface of the sleeve, and there are 4 grooves.

[0048] In an embodiment of the present application, as Figure 1 、 2 shown, the outer wall surface 121 of the funnel groove 120 is an arc that conforms to ergonomics and is suitable for single-handed gripping.

[0049] Specifically, during the open lumbar interbody bone grafting surgery, it is necessary to use a bone grafting pusher 200 to pound bone chips into the intervertebral space and compact them. During the pushing process of the pusher 200, it is necessary to hold the funnel groove 120 by hand to stably cooperate with the pusher 200. By designing the outer wall surface 121 of the funnel groove 120 into an arc that conforms to ergonomics, the funnel groove 120 can be stably held, so that during the pushing process of the pusher 200, especially during the process of using a hammer to strike the pusher 200 to assist the pushing of the pusher 200, it can stand stably and avoid displacement, thereby improving the accuracy and safety of the surgery.

[0050] Furthermore, as Figure 1 、 2 shown, anti-slip patterns are provided on the outer wall surface 121 of the funnel groove 120. In this way, the gripping friction is increased, the gripping stability is improved, and thus the accuracy and safety of the surgery are further improved. For example, the patterns can be protective grooves recessed in the outer wall surface 121 or anti-slip ribs protruding from the outer wall surface 121.

[0051] In an embodiment of the present application, as Figure 3, 4 As shown in 4 , the pusher rod 200 includes a pushing rod 210 for inserting into the catheter 110, and a holding rod 220 fixedly arranged at one end of the pushing rod 210. The pushing rod 210 is perpendicularly arranged with the holding rod 220, and the holding rods 220 are symmetrically arranged on both sides of the holding rod 220.

[0052] Specifically, the pushing rod 210 is used to insert into the catheter 110 to push the bone fragments in the catheter 110 into the intervertebral space and compact them, thus completing bone grafting. The holding rod 220 is for hand-holding to facilitate the application of force. At the same time, the holding rod 220 can also be struck with a hammer to increase the applied force. In addition, by symmetrically arranging the holding rods 220 on both sides of the holding rod 220, it is convenient for the doctor to hold and apply force, and the force can be evenly applied to the pushing rod 210 to avoid the deviation of the pushing rod 210, thereby improving the accuracy and safety of the operation.

[0053] Further, as shown in Figure 3 , 4 4 , the holding rod 220 is a round rod, and a knocking plane 221 is constructed on the top surface of the holding rod 220 for easy knocking.

[0054] Specifically, the round rod is suitable for holding, which can improve the comfort and stability of holding. The knocking plane 221 is constructed thereon, which is convenient for the hammer to apply force, improving the practicability of the holding rod 220. In addition, the knocking plane 221 can be obtained by partially planing the top surface of the round rod, or can be realized by adding a clamping block with a flat top surface. The bottom surface of the clamping block is fixed on the top surface of the holding rod 220, and the top surface of the clamping block is a horizontal plane, thus forming the knocking plane 221.

[0055] Furthermore, the cross-sectional shape of the pushing rod 210 is rectangular to adapt to the catheter 110, thereby improving the pushing efficiency.

[0056] An exemplary usage method of a bone grafting device for open lumbar interbody fusion provided by an embodiment of the present application is as follows:

[0057] During the open lumbar interbody bone grafting operation, first, insert the bone grafting funnel 100 into the intervertebral disc from which the nucleus pulposus has been removed to a predetermined position; then, pour the pre-implanted bone particles into the funnel groove 120 at the upper end of the bone grafting funnel 100; subsequently, use the bone grafting pusher rod 200 to pound the bone fragments into the intervertebral space and compact them, and when necessary, use a hammer to strike the knocking plane 221 on the pusher rod 200 to increase the pushing force, thus completing the implantation of the bone particles.

[0058] It should be understood that although the quantitative terms "first", "second", etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, the first unit may be referred to as the second unit, and similarly the second unit may be referred to as the first unit.

[0059] The outer, middle, inner and other orientation terms mentioned or likely to be mentioned in this specification are defined with respect to the structures shown in the respective drawings. They are relative concepts and may therefore change accordingly depending on their different positions and usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0060] As described above, the above are only the preferred embodiments of the present application, and do not impose any formal or substantial limitations on the present application. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the premise of the method of the present application, several improvements and supplements can still be made, and these improvements and supplements should also be regarded as the protection scope of the present utility model. For those skilled in the art, without departing from the spirit and scope of the present application, any equivalent changes made by making some modifications, decorations and evolutions using the technical content disclosed above are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essence of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A bone grafting device for open lumbar interbody fusion, characterized in that: The bone grafting device comprises: A bone grafting funnel, the bone grafting funnel comprises a catheter and a funnel groove, wherein: the catheter is through along the length direction, and the cross-sectional shape of the catheter is rectangular; the funnel groove is fixed on one end of the catheter along the length direction, the outlet of the funnel groove is connected to the catheter, and the inlet of the funnel groove is exposed; the funnel groove is in the shape of a narrow and long groove, and the funnel grooves are symmetrically arranged on both sides of the catheter; A push rod can be inserted into the catheter to push the bone particles in the catheter into the intervertebral space and compact them, thereby completing bone grafting.

2. A bone grafting device for open lumbar interbody fusion according to claim 1, characterized in that: The catheter is provided with a handle for holding by hand.

3. A bone grafting device for open lumbar interbody fusion as claimed in claim 2, characterized in that: The handle is provided with grooves for fingers to dig into.

4. A bone grafting device for open lumbar interbody fusion as claimed in claim 1, characterized in that: The outer wall surface of the funnel groove is in an arc shape that conforms to ergonomics and is suitable for single-handed holding.

5. The bone grafting device for open lumbar interbody fusion according to claim 1, characterized in that: The outer wall of the funnel groove is provided with anti-slip patterns.

6. A bone grafting device for open lumbar interbody fusion as claimed in claim 1, characterized in that: The push rod comprises a push rod for inserting into the catheter, and a holding rod fixedly arranged on one end of the push rod, the push rod is vertically connected to the holding rod, and the holding rods are symmetrically arranged on both sides of the holding rod.

7. A bone grafting device for open lumbar interbody fusion according to claim 6, characterized in that: The gripping rod is a round rod, and a striking plane is configured on the top surface of the gripping rod for easy striking.

8. A bone grafting device for open lumbar interbody fusion according to claim 7, characterized in that: A clamping block is arranged on the top surface of the holding rod, the bottom surface of the clamping block is fixed on the top surface of the holding rod, and the top surface of the clamping block is a horizontal plane, thereby forming the knocking plane.

9. A bone grafting device for open lumbar interbody fusion according to any one of claims 6 to 8, characterized in that: The cross-sectional shape of the pushing rod is rectangular to fit the catheter.

10. The bone grafting device for open lumbar interbody fusion according to claim 1, characterized in that: The cross-sectional dimensions of the catheter were 1 cm x 0.8 cm.

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