Expandable interbody fusion cage driving channel
The expansion of intervertebral fusion device injects the channel, which solves the problem of fixed-size channel limitation, and achieves minimally invasive implantation and cost reduction of fusion devices of different sizes, protecting neurosafety.
Patent Information
- Application Number
- CN202422127518.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The fixed shape and size of the existing intervertebral fusion channel limit the choice of implants, resulting in increased manufacturing costs and hospital procurement costs, and it is easy to cause damage to the intervertebral nerves during minimally invasive surgery.
An expandable intervertebral fusion device inlet channel is designed, through a combination of a U-shaped base and a U-shaped upper cover, allowing the channel height to be adjusted, adapted to different sizes of intervertebral fusion devices, reducing wound size and protecting nerves.
It is realized that the larger intervertebral fusion device is placed through a small invasion, reducing the manufacturing cost and procurement cost, while reducing the risk of nerve damage.
Smart Images
Figure CN223068655U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an expandable intervertebral fusion device insertion channel, belonging to the technical field of medical devices. Background Art
[0002] Compared with traditional open spine surgery, minimally invasive spine surgery has the advantages of reducing muscle dissection and reducing wound infection. However, in minimally invasive surgery, intervertebral fusion is relatively difficult, and during the process of inserting the fusion device, it is easy to damage the nerves between the vertebral bodies.
[0003] Currently, the intervertebral fusion device channel generally uses a channel tube with a fixed shape and size, which limits the size of the implanted intervertebral fusion device. Thus, it is necessary to produce and design channel tubes of different sizes for different-sized intervertebral fusion devices, which not only increases the manufacturing cost but also increases the procurement cost of hospitals. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an expandable intervertebral fusion device insertion channel to solve the technical problems in the prior art. It can be expanded to realize the construction of insertion channels for different-sized intervertebral fusion devices, not only reducing the manufacturing cost but also reducing the procurement cost.
[0005] The utility model provides an expandable intervertebral fusion device insertion channel, including a U-shaped base and a U-shaped upper cover. The U-shaped upper cover covers the U-shaped base, and the U-shaped upper cover can move along the height direction of the U-shaped base. The U-shaped base and the U-shaped upper cover form a channel with both ends open.
[0006] In the aforementioned expandable intervertebral fusion device insertion channel, preferably, the U-shaped base includes a first side plate, a bottom plate, and a second side plate. The first side plate and the second side plate are respectively fixed on two long sides of the bottom plate. The first side plate is parallel to the second side plate, and both are perpendicular to the bottom plate.
[0007] In the aforementioned expandable intervertebral fusion device insertion channel, preferably, a holding plate is fixed on the outer walls of the same ends of the first side plate and the second side plate.
[0008] In the aforementioned expandable intervertebral fusion device insertion channel, preferably, a long strip-shaped groove is formed on the holding plate.
[0009] In the aforementioned expandable intervertebral fusion device insertion channel, preferably, both the first side plate and the second side plate are composed of two sections, and the height of one section is greater than that of the other section.
[0010] In the aforementioned expandable intervertebral fusion device insertion channel, preferably, a guiding post and a limiting protrusion are formed on the outer walls of both the first side plate and the second side plate. The guiding post is located at one end close to the handheld plate, and the limiting protrusion is located at one end far from the handheld plate.
[0011] In the aforementioned expandable intervertebral fusion device insertion channel, preferably, a shielding plate is formed at the end of the first side plate far from the handheld plate.
[0012] In the aforementioned expandable intervertebral fusion device insertion channel, preferably, the U-shaped upper cover includes a third side plate, a top plate, and a fourth side plate. The third side plate and the fourth side plate are respectively fixed on the two long sides of the top plate, and the distance between the inner walls of the third side plate and the fourth side plate is equal to the distance between the outer walls of the first side plate and the second side plate.
[0013] In the aforementioned expandable intervertebral fusion device insertion channel, preferably, the third side plate and the fourth side plate are also composed of two segments, and the height of one segment is greater than that of the other segment.
[0014] In the aforementioned expandable intervertebral fusion device insertion channel, preferably, long strip guiding holes and rectangular limiting grooves are formed on both the third side plate and the fourth side plate.
[0015] Compared with the prior art, the utility model includes a U-shaped base and a U-shaped upper cover. The U-shaped upper cover covers the U-shaped base, and the U-shaped upper cover can move along the height direction of the U-shaped base. The U-shaped base and the U-shaped upper cover form a channel open at both ends. Through the cooperation of the U-shaped base and the U-shaped upper cover, the height of the channel can be changed by moving the U-shaped upper cover upward, so that intervertebral fusion devices of different sizes can be sent into the lamina space through this channel, realizing the insertion of a larger intervertebral fusion device through a small incision. By using the utility model, channel tubes of different sizes in the prior art can be replaced, not only reducing the manufacturing cost but also reducing the procurement cost of hospitals. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is an axonometric view of the utility model;
[0017] Figure 2 is an axonometric view of the utility model in a separated state of the U-shaped upper cover and the U-shaped base;
[0018] Figure 3 is a front view of the utility model in a separated state of the U-shaped upper cover and the U-shaped base.
[0019] Description of the reference numerals: U-shaped base 1, U-shaped upper cover 2, first side plate 3, bottom plate 4, second side plate 5, hand-held plate 6, long strip-shaped groove 7, guide post 8, limit projection 9, shielding plate 10, third side plate 11, top plate 12, fourth side plate 13, long strip-shaped guide hole 14, rectangular limit groove 15. Detailed implementation manners
[0020] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.
[0021] Embodiments of the present utility model: As Figures 1 - 3 shown, an expandable intervertebral fusion device insertion channel includes a U-shaped base 1 and a U-shaped upper cover 2. The U-shaped upper cover 2 covers the U-shaped base 1, and the U-shaped upper cover 2 can move along the height direction of the U-shaped base 1. The U-shaped base 1 and the U-shaped upper cover 2 form a channel with both ends open.
[0022] Adopting a split design of the U-shaped upper cover 2 and the U-shaped base 1, by adjusting the position of the U-shaped upper cover 2, the height of the channel formed by the two can be changed, so that intervertebral fusion devices of different sizes can enter the lamina space in the patient's body through this channel. The present utility model can be used for all models of intervertebral fusion devices on the current market, with a wide coverage range, and can replace the channel tubes of all sizes in the prior art.
[0023] In a specific implementation manner, the U-shaped base 1 includes a first side plate 3, a bottom plate 4, and a second side plate 5. The first side plate 3 and the second side plate 5 are respectively fixed on two long sides of the bottom plate 4. The first side plate 3 is parallel to the second side plate 5, and both the first side plate 3 and the second side plate 5 are perpendicular to the bottom plate 4.
[0024] The first side plate 3, the second side plate 5, and the bottom plate 4 are integrally formed. For the convenience of operation, a hand-held plate 6 is fixed on the outer walls of the same ends of the first side plate 3 and the second side plate 5.
[0025] The provision of the hand-held plate 6 can facilitate the doctor to hold the U-shaped base 1 firmly. To prevent slipping, preferably, a long strip-shaped groove 7 is opened on the hand-held plate 6.
[0026] Furthermore, both the first side plate 3 and the second side plate 5 are composed of two sections, which are called the first section and the second section for the convenience of description. The height of the second section is greater than the height of the first section. Please refer to Figure 3, the height h1 of the first section on the first side plate 3 and the second side plate 5 is 8 mm - 12 mm, preferably 10.5 mm. The height h2 of the second section is 13 mm - 18 mm, preferably 15.5 mm. The length of the first section should be greater than that of the second section, and the specific length is set according to requirements and is not specifically limited in this embodiment. The bottom plate 4 is a flat plate.
[0027] With the above structural design, during use, the first section is inserted into the patient's body through the wound, and the second section is located outside the patient's body. In this way, the larger height of the second section facilitates the placement of the intervertebral fusion device, and the smaller height of the first section can pass through a smaller wound, and the smaller wound causes less trauma to the patient's body.
[0028] Similarly, the U-shaped upper cover 2 includes a third side plate 11, a top plate 12, and a fourth side plate 13. The third side plate 11 and the fourth side plate 13 are respectively fixed on the two long sides of the top plate 12. The distance between the inner walls of the third side plate 11 and the fourth side plate 13 is equal to the distance between the outer walls of the first side plate 3 and the second side plate 5.
[0029] The third side plate 11 and the fourth side plate 13 are also composed of two sections, which are called the third section and the fourth section for the convenience of description. The height of the fourth section is greater than that of the third section. The height h3 of the third section is 7 mm - 12 mm, preferably 10 mm. The height h4 of the fourth section is 12 mm - 17 mm, preferably 15 mm. The length of the third section is slightly less than that of the first section, and the length of the fourth section is slightly less than that of the second section.
[0030] Since the top plate 12 is fixedly connected to the tops of the third side plate 11 and the fourth side plate 13, and a height difference is formed on the top surfaces of the third side plate 11 and the fourth side plate 13, the top plate 12 is a bent plate, and the connection position between the third section and the fourth section is transitioned through an inclined surface. Therefore, the top plate 12 is composed of two horizontal sections and an inclined section. With this design, it is convenient to push the top plate 12 by the intervertebral fusion device to move the U-shaped upper cover 2 upward, facilitating the passage of the intervertebral fusion device.
[0031] Furthermore, a guide post 8 and a limit protrusion 9 are formed on the outer walls of the first side plate 3 and the second side plate 5. The guide post 8 is located at one end close to the handheld plate 6, and the limit protrusion 9 is located at one end far from the handheld plate 6.
[0032] Long strip guide holes 14 and rectangular limit grooves 15 are formed on both the third side plate 11 and the fourth side plate 13. The opening of the rectangular limit groove 15 is located at the bottom of the third side plate 11 and the fourth side plate 13, and the long strip guide holes 14 extend along the height direction of the third side plate 11 and the fourth side plate 13.
[0033] The guide post 8 is located within the long strip guide hole 14. Through the cooperation of the guide post 8 and the long strip guide hole 14, the U-shaped upper cover 2 can only move along the height direction, and the cooperation between the limit protrusion 9 and the rectangular limit groove 15 plays an auxiliary limiting role.
[0034] In a preferred embodiment, a shielding plate 10 is formed at the end of the first side plate 3 away from the hand-held plate 6. The ends of the second side plate 5, the third side plate 11, and the fourth side plate 13 away from the hand-held plate 6 are all arc-shaped structures. The shielding plate 10 can shield the nerves and tissues near the lamina gap, preventing damage to the nerves or tissues during the implantation of the intervertebral fusion device. The other side plates are not provided with shielding plates to prevent excessive obstruction of the visual field.
[0035] The working principle of the present utility model: When in use, hold the two hand-held plates 6 with hands, insert the end with a smaller height of the U-shaped base 1 and the U-shaped upper cover 2 into the patient's body through the wound on the patient, so that the shielding plate 10 shields the nerves and tissues beside the lamina gap, align the passage opening formed by the U-shaped base 1 and the U-shaped upper cover 2 with the lamina gap where the intervertebral fusion device needs to be implanted, and insert the intervertebral fusion device into the passage through the end where the hand-held plate 6 is located. The height of this end is larger and can accommodate intervertebral fusion devices of all sizes. If the size of the intervertebral fusion device is larger, the U-shaped upper cover 2 can be manually lifted to expand the size of the passage. Through the cooperation of the guide post 8 and the long strip guide hole 14, there is no need to worry about the misalignment of the U-shaped upper cover 2 and the U-shaped base 1. After the intervertebral fusion device is successfully inserted into the lamina gap through the passage, the present utility model can be taken out.
[0036] The structure, features, and function effects of the present utility model have been described in detail based on the embodiments shown in the drawings. The above is only the preferred embodiment of the present utility model, but the present utility model is not limited by the scope shown in the drawings. Any changes made according to the concept of the present utility model, or modified into equivalent embodiments with equivalent changes, still within the spirit covered by the description and the drawings, should be within the protection scope of the present utility model.
Claims
1. An expandable intervertebral fusion device insertion channel, characterized in that: It includes a U-shaped base (1) and a U-shaped upper cover (2). The U-shaped upper cover (2) covers the U-shaped base (1), and the U-shaped upper cover (2) can move along the height direction of the U-shaped base (1). The U-shaped base (1) and the U-shaped upper cover (2) form a channel with both ends open.
2. The expandable intervertebral fusion device insertion channel according to claim 1, characterized in that: The U-shaped base (1) includes a first side plate (3), a bottom plate (4) and a second side plate (5). The first side plate (3) and the second side plate (5) are respectively fixed on two long sides of the bottom plate (4). The first side plate (3) is parallel to the second side plate (5), and both are perpendicular to the bottom plate (4).
3. The expandable intervertebral fusion device insertion channel according to claim 2, wherein: A hand-held plate (6) is fixed on the outer walls of the same ends of the first side plate (3) and the second side plate (5).
4. The expandable intervertebral fusion device insertion channel according to claim 3, wherein: A long strip-shaped groove (7) is formed on the hand-held plate (6).
5. The expandable intervertebral fusion implant insertion channel according to claim 4, wherein: Both the first side plate (3) and the second side plate (5) are composed of two sections, and the height of one section is greater than that of the other section.
6. The expandable intervertebral fusion device insertion channel according to claim 5, wherein: A guide post (8) and a limit protrusion (9) are formed on the outer walls of both the first side plate (3) and the second side plate (5). The guide post (8) is located at one end close to the hand-held plate (6), and the limit protrusion (9) is located at one end far from the hand-held plate (6).
7. The expandable intervertebral fusion device insertion channel according to claim 6, characterized in that: A shielding plate (10) is formed at the end of the first side plate (3) far from the hand-held plate (6).
8. The expandable intervertebral fusion device insertion channel according to claim 6, characterized in that: The U-shaped upper cover (2) includes a third side plate (11), a top plate (12) and a fourth side plate (13). The third side plate (11) and the fourth side plate (13) are respectively fixed on two long sides of the top plate (12). The distance between the inner walls of the third side plate (11) and the fourth side plate (13) is equal to the distance between the outer walls of the first side plate (3) and the second side plate (5).
9. The expandable intervertebral fusion device insertion channel according to claim 8, characterized in that: Both the third side plate (11) and the fourth side plate (13) are also composed of two sections, and the height of one section is greater than that of the other section.
10. The expandable intervertebral fusion device insertion channel according to claim 8, characterized in that: Long strip-shaped guide holes (14) and rectangular limit grooves (15) are formed on both the third side plate (11) and the fourth side plate (13).