Multifunctional Arthroscopic Approach Guide Rod

Abstract

To provide a multifunctional arthroscopic approach guide rod that effectively solves problems that have conventionally existed in the process of establishing an approach for hip arthroscopic surgery, such as complicated operation, time and labor required, excessive exposure to radiation, and the possibility of damage to tissues around the hip joint. [Solution] The device comprises a guide structure (10) having a first guide rail (11) along which the puncture needle slides, and a separation structure (20) connected to the guide structure, the separation structure having an arcuate surface (21) at the end of the separation structure away from the guide structure, the separation structure having a second guide rail (22) along which the puncture needle slides, the second guide rail being connected to the first guide rail.

Description

[Technical Field]

[0001] This application relates to the field of arthroscopic treatment instruments, and more particularly to a multi-function arthroscopic approach guide rod. [Background technology]

[0002] Hip sports injuries, such as femoroacetabular impingement (FAI), are common among young and middle-aged sports fans. With the continuous development of minimally invasive arthroscopic surgical techniques, hip arthroscopy has gradually replaced traditional open surgical treatment methods and become the mainstream surgical treatment for hip sports injuries. Hip arthroscopy offers significant advantages, including less trauma, faster postoperative recovery, and fewer complications, and significantly improved treatment outcomes compared with open surgery. However, hip arthroscopy remains technically challenging, particularly due to the long learning curve and difficulty in mastering the technique, which limits its adoption and also results in some uncertainty regarding patient outcomes.

[0003] Establishing the approach for hip arthroscopic surgery is the main technical challenge surgeons face. Only once the approach is successfully established can subsequent surgical procedures be performed. The main reasons for the difficulty in establishing the approach are the narrow space of the hip joint and the abundant muscle and fatty tissue surrounding it. The hip joint is a ball-and-socket joint, and the femoral head and acetabular cartilage surface are in close contact under a negative pressure environment. During surgery, the lower leg must be pulled to expand the joint space. However, this space is very narrow, only 8–10 mm, making it difficult to accurately identify its location. At the same time, the surrounding muscle and fatty tissue make it difficult for surgeons to quickly determine the location of the joint space by touch, further complicating the establishment of the approach.

[0004] Conventional solutions rely on fluoroscopic guidance, identifying the joint space through fluoroscopy, roughly inserting a needle into the space, and then confirming the accuracy of the needle through fluoroscopy. This process often requires repeated manipulations, which is tedious and time-consuming, increases radiation exposure, and can damage the muscles, nerves, and blood vessels around the hip joint, potentially leading to complications. Therefore, there is an urgent need for a device that can quickly and accurately find a path to the joint space and bluntly separate the surrounding tissues without fluoroscopy.

[0005] In fact, the hip joint is surrounded by a tough joint capsule, forming a sealed space. When the lower limb is pulled to open the hip joint space, the continuous negative pressure within the hip joint cavity causes the joint capsule on the surface of the joint space to deform and sink into the joint space. This characteristic provides an effective basis for locating the hip joint space. However, because the hip joint is surrounded by thick muscle and fatty tissue, this depression cannot be directly felt by hand. By designing this device based on this principle, it is possible to quickly and accurately find the correct path to enter the joint space without relying on X-ray fluoroscopy. With further refinement, this device can also bluntly separate the tissues around the hip joint, thereby avoiding damage to surrounding structures. Summary of the Invention [Problem to be solved by the invention]

[0006] One technical problem that this application solves is the problems that exist in the process of establishing a hip arthroscopic surgery approach, such as cumbersome procedures, time-consuming and labor-intensive procedures, excessive exposure to radiation, and the possibility of damage to tissues around the hip joint.

[0007] In order to solve the above technical problems, the present application provides a multifunctional arthroscopic approach guide rod. [Means for solving the problem]

[0008] The multifunctional arthroscopic approach guide rod provided by the present application comprises a guide structure having a first guide rail along which a puncture needle slides, and a separation structure connected to the guide structure, the separation structure having an arcuate surface at an end of the separation structure away from the guide structure, the separation structure having a second guide rail along which the puncture needle slides, the second guide rail being connected to the first guide rail.

[0009] In some embodiments, the separation structure includes a first transition surface and a second transition surface, the first transition surface is connected to the guide structure and is connected to the arc surface, and the second transition surface is connected to the guide structure and is connected to the arc surface, and the distance between the first transition surface and the second transition surface continuously decreases in a direction toward and away from the guide structure.

[0010] In some embodiments, the second guide rail is located on the first transition surface, a first end of the second guide rail is connected to the first guide rail, and a second end of the second guide rail passes through the arc apex of the arc surface.

[0011] In some embodiments, the minimum distance between the first transition surface and the second transition surface is 1 mm.

[0012] In some embodiments, there are two separation structures, and the two separation structures are respectively installed at both ends of the guide structure.

[0013] In some embodiments, the bottom surface of the first guide rail and the bottom surface of the second guide rail are coplanar.

[0014] In some embodiments, the outer wall of the guide structure is a cylindrical surface.

[0015] In some embodiments, the arcuate surface has a width projected along the axis of the cylindrical surface that is greater than the width projected along the axis of the cylindrical surface of the guide structure.

[0016] In some embodiments, the multi-function arthroscopic approach guide rod further includes a tapered structure connected to the end of the guide structure remote from the separation structure.

[0017] In some embodiments, the depth of the second guide rail decreases continuously in a direction toward and away from the guide structure.

[0018] Using the above technical solution, the multifunctional arthroscopic approach guide rod provided in this application first pulls the lower limb to open the hip joint space by 8 to 10 millimeters. Then, the end with the separation structure is inserted through a surgical incision around the hip joint. The separation structure of the multifunctional arthroscopic approach guide rod is used to bluntly separate tissues such as muscles, nerves, and blood vessels around the hip joint capsule. The separation structure slides in the joint capsule area until it touches a depression on the surface of the hip joint capsule. When the separation structure presses against the depression, it feels elastic and hollow. This is called the "soft spot." At this point, the separation structure is located outside the distracted hip joint space. At this position, a puncture needle is inserted along the first guide rail, which guides the puncture needle to slide to the second guide rail, after which the puncture needle penetrates the joint capsule and enters the joint space. A guidewire and an exchange guide rod are sequentially inserted along the path determined by the puncture needle. After expanding the diameter of the approach channel, an approach chute is placed to complete the establishment of the approach. The end of the separation structure away from the guide structure has an arcuate design, which allows for blunt separation of the tissues surrounding the hip joint capsule, avoiding damage to muscles, nerves, and blood vessels, and allowing for a clearer subsequent location of the "soft spot" on the surface of the joint capsule. At the same time, medical staff can determine by touch whether the separation structure has reached the outside of the hip joint space without relying on X-ray fluoroscopy, greatly improving the efficiency of locating the joint space and the accuracy of the puncture operation. The technical solution of this application effectively solves the problems that exist in the prior art in the process of establishing an approach for hip arthroscopic surgery, such as cumbersome operations, time-consuming and labor-intensive procedures, excessive radiation exposure, and the possibility of damage to the tissues surrounding the hip joint. [Brief explanation of the drawings]

[0019] In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can further obtain other drawings based on these drawings without any creative work.

[0020] [Figure 1] 1 is a schematic structural diagram of a multifunctional arthroscopic approach guide rod disclosed in Example 1 of the present application. [Figure 2] FIG. 2 is a schematic structural diagram of the multifunctional arthroscopic approach guide rod of FIG. 1 in an operating state. [Figure 3] 2 is a schematic view showing the front structure of the multifunctional arthroscopic approach guide rod of FIG. 1. [Figure 4] 2 is a schematic diagram showing the top surface structure of the multifunctional arthroscopic approach guide rod of FIG. 1. FIG. [Figure 5] 2 is a schematic diagram showing a partially enlarged top view of the separation structure of the multifunctional arthroscopic approach guide rod of FIG. 1. FIG. [Figure 6] 2 is a schematic diagram showing a partial cross-sectional structure of the multifunctional arthroscopic approach guide rod of FIG. 1. [Figure 7] FIG. 10 is a schematic diagram showing a partial cross-sectional structure of a multifunctional arthroscopic approach guide rod disclosed in Example 2 of the present application. [Figure 8] FIG. 10 is a schematic diagram showing the top structure of the multifunctional arthroscopic approach guide rod disclosed in Example 3 of the present application. [Figure 9] FIG. 10 is a schematic diagram showing a right side view of the guide structure of the multifunctional arthroscopic approach guide rod disclosed in Example 4 of the present application. [Figure 10] 10 is a schematic diagram showing a left side view of the separation structure of the multifunctional arthroscopic approach guide rod of FIG. 9. FIG. [Figure 11] FIG. 10 is a schematic structural diagram of the limiting protrusion of the multifunctional arthroscopic approach guide rod of FIG. 9 . [Figure 12] FIG. 10 is a schematic diagram showing the top surface structure of the multifunctional arthroscopic approach guide rod disclosed in Example 5 of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, the embodiments of the present application will be described in more detail with reference to the drawings and examples. The detailed description of the following examples and the drawings are used to exemplify the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be realized in many different forms and is not limited to the specific embodiments of the present application, but rather includes all technical solutions included in the claims.

[0022] The present application provides these examples to make the present application thorough and complete and to fully convey the scope of the present application to those skilled in the art. It should be noted that unless otherwise specified, the relative arrangement of components and steps, composition of materials, formulas and numerical values described in these examples should be construed as merely illustrative and not limiting.

[0023] It should be noted that in the description of this application, unless otherwise specified, "plurality" means two or more, and the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "inner," and "outer" are merely for the purpose of facilitating and simplifying the description of this application, and do not indicate or imply that the devices or elements shown necessarily have a particular orientation or are constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. If the absolute positions of the objects described change, the relative positional relationships may change accordingly.

[0024] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, number, or importance, but are used to distinguish between different parts. "Perpendicular" does not mean perpendicular in the strict sense, but has a margin of error. "Parallel" does not mean parallel in the strict sense, but has a margin of error. Similar terms such as "include" or "comprise" mean that the element shown before the term covers the element listed after the term, but does not exclude other elements.

[0025] It should also be noted that, unless otherwise clearly specified or limited, in the description of this application, terms such as "attached," "coupled," and "connected" should be understood in a broad sense, and may refer to, for example, fixedly connected, detachably connected, or integrally connected. They may also refer to direct connection or indirect connection via an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances. When describing that a specific device is located between a first device and a second device, there may or may not be an intervening device between the specific device and the first or second device.

[0026] Unless otherwise defined, all terms used herein have the same meaning as understood by those skilled in the art. It should also be understood that terms defined in, for example, commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined.

[0027] Techniques, methods and equipment known to those of ordinary skill in the relevant art need not be described in detail, but where appropriate, the techniques, methods and equipment should be considered part of the specification.

[0028] As shown in Figures 1 to 6, the multifunctional arthroscopic approach guide rod disclosed in Example 1 of the present application includes a guide structure 10 and a separation structure 20, where the guide structure 10 has a first guide rail 11 for the puncture needle to slide along, the separation structure 20 is connected to the guide structure 10 and has an arcuate surface 21 at the end of the separation structure 20 away from the guide structure 10, and the separation structure 20 has a second guide rail 22 for the puncture needle to slide along, the second guide rail 22 is connected to the first guide rail 11.

[0029] Using the technical solution of Example 1, first, the lower limb is pulled to open the hip joint space by 8 to 10 millimeters. Then, the end with the separation structure 20 is inserted through a surgical incision around the hip joint. The separation structure 20 of the multifunctional arthroscopic approach guide rod is used to bluntly separate tissues such as muscles, nerves, and blood vessels around the hip joint capsule. The separation structure 20 slides in the joint capsule area until it touches a depression on the surface of the hip joint capsule. When the separation structure presses against the depression, it feels elastic and hollow. This is called the "soft spot." At this point, the separation structure 20 is located outside the distracted hip joint space. At this position, a puncture needle is inserted along the first guide rail 11, which guides the puncture needle to slide to the second guide rail 22, after which the puncture needle penetrates the joint capsule and enters the joint space. The guidewire and exchange guide rod are inserted sequentially along the path determined by the puncture needle to expand the diameter of the approach channel, and then the approach chute is positioned to complete the establishment of the approach. The end of the separation structure 20 away from the guide structure 10 is designed with an arcuate surface 21, which allows for blunt separation of the surrounding tissue, avoiding damage to muscles, nerves, and blood vessels, and allowing for a clearer subsequent identification of the "soft spot" on the surface of the joint capsule. At the same time, medical staff can determine whether the separation structure 20 has reached the outside of the hip joint space by touch without relying on fluoroscopy, greatly improving the efficiency of identifying the joint space and the accuracy of the puncture operation. The technical solution of Example 1 effectively solves the problems that exist in the prior art during the establishment of the approach for hip arthroscopic surgery, such as cumbersome operations, time-consuming and labor-intensive procedures, excessive radiation exposure, and the possibility of damage to the tissues surrounding the hip joint.

[0030] It is necessary to explain that the guide structure 10 corresponds to the approach guide rod of the prior application, the separation structure 20 corresponds to the tongue depressor of the prior application, the first guide rail 11 and the second guide rail 22 correspond to the open chute of the prior application, and the arc surface 21 corresponds to the outer arc surface of the tongue depressor of the prior application. From the center to the periphery of the arc surface 21, the distance between the arc surface 21 and the guide structure 10 decreases continuously, and the arc surface 21 is a smoothly curved surface.

[0031] As shown in Figures 1 to 6, in the technical solution of Example 1, the separation structure 20 includes a first transition surface 23 and a second transition surface 24. The first transition surface 23 is connected to the guide structure 10 and also to the arcuate surface 21. The second transition surface 24 is connected to the guide structure 10 and also to the arcuate surface 21. The distance between the first transition surface 23 and the second transition surface 24 continuously decreases from the direction toward the guide structure 10 to the direction away from the guide structure 10. The first transition surface 23 and the second transition surface 24 correspond to the upper and lower surfaces of the tongue depressor in the prior application. The arcuate surface 21 and the first transition surface 23 and the second transition surface 24 are all smoothly connected, which prevents sharp protrusions on the separation structure 20 from damaging the hip joint tissues. After the arthroscopic approach guide rod is inserted near the hip joint, the arc-shaped surface 21 abuts against the muscle tissue attached to the surface of the joint capsule, and the peripheral muscle tissue of the hip joint is located on both sides of the separation structure 20. As the arthroscopic approach guide rod slides, the muscle tissue attached to the surface of the joint capsule and the arc-shaped surface 21 slide relative to each other. As the arthroscopic approach guide rod moves toward and away from the guide structure 10, the distance between the first transition surface 23 and the second transition surface 24 continuously decreases. Furthermore, because the first transition surface 23 and the second transition surface 24 are both concave arc-shaped surfaces, as the arthroscopic approach guide rod continues to slide, the muscle tissue attached to the surface of the joint capsule, along with the blood vessels and nerves contained therein, is gradually separated from the surface of the joint capsule and moves toward the first transition surface 23 and the second transition surface 24.

[0032] As shown in Figures 1 to 3, in the technical solution of Example 1, the second guide rail 22 is located on the first transition surface 23, the first end of the second guide rail 22 is connected to the first guide rail 11, and the second end of the second guide rail 22 passes through the arc apex of the arc surface 21. After the multifunctional arthroscopic approach guide rod is properly installed, the first transition surface 23 contacts the outer tissue, and the second transition surface 24 contacts the joint capsule, at which time the arc apex of the arc surface 21 abuts against the corresponding joint capsule outside the joint space. The second guide rail 22, installed on the first transition surface 23, faces the outer tissue and divides the first transition surface 23 into two arcuate surfaces. The second guide rail 22 is located in the center of the first transition surface 23. The puncture needle is installed within the first guide rail 11. At this time, the tip of the puncture needle abuts the bottom surface of the first guide rail 11 and slides along the first guide rail 11 into the second guide rail 22. After the tip extends from the second end of the second guide rail 22, it punctures the joint capsule and enters the joint space, establishing an access for the arthroscope. During this process, the tip of the puncture needle always remains within the first guide rail 11 or the second guide rail 22 until it punctures the joint capsule. The first guide rail 11 and the second guide rail 22 not only guide the puncture needle, but also prevent it from puncturing other external tissues or damaging blood vessels or nerves around the hip joint.

[0033] As shown in Figures 1, 2, 4, and 5, in the technical solution of Example 1, the minimum distance between the first transition surface 23 and the second transition surface 24 is 1 mm. This minimum distance is the minimum thickness of the end of the separation structure 20 that is away from the guide structure 10. 'd' represents this minimum thickness. As shown in Figure 4, if the minimum distance between the first transition surface 23 and the second transition surface 24 is less than 1 mm, the end of the separation structure 20 that first contacts the joint capsule will be relatively sharp and will likely pierce blood vessels and nerves around the hip joint during the process of separating the joint capsule from external tissues. If the minimum distance between the first transition surface 23 and the second transition surface 24 is 1 mm or more, it will be difficult to separate the joint capsule from the muscle tissue attached to its surface during the process of sliding the multifunctional arthroscopic approach guide rod.

[0034] As shown in Figure 6, in the technical solution of Example 1, the bottom surface of the first guide rail 11 and the bottom surface of the second guide rail 22 are located on the same plane. In Example 1, this plane is parallel to the horizontal plane, that is, the depth of the first guide rail 11 is the same everywhere. This ensures a smooth connection between the first guide rail 11 and the second guide rail 22, and the movement of the puncture needle is stable and unhindered during the sliding insertion process.

[0035] As shown in Figures 1 to 5, in the technical solution of Example 1, the outer wall of the guide structure 10 is a cylindrical surface. The outer surface of the cylindrical surface has no edges or corners, which can prevent secondary trauma when the outer wall of the guide structure 10 comes into contact with the inner surface of a wound on the human body. In other examples, the outer surface of the guide structure 10 can be an elliptical cylinder. In Example 1, selecting a guide structure 10 with a cylindrical outer surface ensures that the guide structure 10 is stable against external forces applied by medical staff during operation and is less likely to rotate.

[0036] 1 to 3, in the technical solution of Example 1, the projected width of the arc surface 21 along the axis of the cylindrical surface is greater than the projected width of the cylindrical surface of the guide structure 10 along the axis. Because the separation structure 20 is flat, while the guide structure 10 is cylindrical, and the thickness of the separation structure 20 is less than the diameter of the guide structure 10, the projected width of the arc surface 21 along the axis of the cylindrical surface is greater than the projected width of the cylindrical surface of the guide structure 10 along the axis of the cylindrical surface, which ensures that the guide structure 10 can be inserted into the passage after being separated by the separation structure 20.

[0037] As shown in FIGS. 1 to 5 , in the technical solution of Example 1, the multifunctional arthroscopic approach guide rod further includes a tapered structure 30 connected to the end of the guide structure 10 that is remote from the separation structure 20. The tapered structure 30 has a third guide rail connected to the first guide rail 11, allowing the puncture needle to slide freely within the third guide rail, the first guide rail 11, and the second guide rail 22. The diameter of the tapered structure 30 continuously decreases from the direction toward the guide structure 10 to the direction away from it. The tapered structure 30 can also be used to establish an arthroscopic approach. The tapered structure 30 allows both ends of the multifunctional arthroscopic approach guide rod to be used to establish an arthroscopic approach, avoiding the problem of one end being deformed or damaged, rendering the multifunctional arthroscopic approach guide rod unusable.

[0038] As shown in Figure 7, the difference between the technical solution of Example 2 and the technical solution of Example 1 is that the depth of the second guide rail 22 continuously decreases in the direction toward and away from the guide structure 10. The depth of the first guide rail 11 continuously increases in the direction toward and away from the separation structure 20, and the bottom surfaces of the first guide rail 11 and the second guide rail 22 form a smooth connecting surface. This prevents the sliding process of the puncture needle from being hindered, and at the same time, provides a certain initial angle for the insertion of the puncture needle, making it easier to insert the puncture needle.

[0039] As shown in Figure 8, the technical solution of Example 3 differs from the technical solution of Example 1 in that there are two separation structures 20, which are installed at both ends of the guide structure 10. The installation of two separation structures 20 allows both ends of the multifunctional arthroscopic approach guide rod to be inserted into the wound to find the joint space, facilitating operation by medical staff. The second guide rails 22 of the two separation structures 20 can be set to different widths, allowing different sizes of puncture needles to slide through, improving versatility.

[0040] As shown in Figures 9 to 11, the technical solution of Example 4 differs from the technical solution of Example 1 in that the separating structure 20 is detachably connected to the guide structure 10, the guide structure 10 has a limiting groove 12 on an end face close to the separating structure 20, and the separating structure 20 has a limiting protrusion 25 installed corresponding to the limiting groove 12. The limiting groove 12 includes an arc-shaped groove and has a blind hole at one end of the arc-shaped groove, the direction of the blind hole is the same as that of the arc-shaped groove, and the limiting protrusion 25 includes a connecting portion and a limiting portion, and the limiting portion is an arc-shaped block with a diameter the same as that of the arc-shaped groove. When installing the separation structure 20 and the guide structure 10, a portion of the arc-shaped block is inserted into the arc-shaped groove, and the separation structure 20 is rotated. The arc-shaped block slides along the arc-shaped groove and enters the blind hole. The connecting portion presses against the end face of the arc-shaped groove closest to the blind hole, and then the rotation of the separation structure 20 is stopped. At this time, the connection between the separation structure 20 and the guide structure 10 is completed. If it needs to be removed and replaced, the separation structure 20 can be rotated in the opposite direction. The technical solution of Example 4 allows the separation structure 20 to be replaced according to specific needs, thereby enabling arthroscopic approaches of different sizes and increasing versatility.

[0041] As shown in Figures 9 to 11, in the technical solution of Example 4, the width of the second guide rail 22 continuously decreases from the direction toward the guide structure 10 to the direction away from the guide structure 10. To accommodate different sizes of puncture needles, the width of the first guide rail 11 is larger than the diameter of the largest type of puncture needle, and a corresponding separation structure 20 is arranged according to each type of puncture needle. The end of the second guide rail 22 of each separation structure 20 close to the first guide rail 11 and the width of the first guide rail 11 are the same, and the width of the end of the second guide rail 22 of each separation structure 20 away from the first guide rail 11 is set according to the diameter of the corresponding puncture needle, thereby ensuring the sliding of the puncture needle and restricting the puncture needle to move in a direction perpendicular to the side wall of the second guide rail 22, thereby avoiding misalignment of the puncture position.

[0042] As shown in Figure 12, the technical solution of Example 5 differs from the technical solution of Example 1 in that the arthroscopic approach guide rod further includes a handle structure 40 connected to the guide structure 10 and located at the end of the guide structure 10 away from the separation structure 20. The handle structure 40 has an oval-shaped main body and is ergonomically designed. When gripped, the contact area between the handle structure 40 and the hand is relatively large, making it easy for medical staff to operate. The handle structure 40 is provided with a rubber layer on the outside to improve the friction coefficient and prevent slippage during operation. The guide structure 10 has a threaded portion at the end away from the separation structure 20, and the handle structure 40 has a threaded hole that matches the threaded portion. The handle structure 40 and the guide structure 10 are connected by the thread. When the separation structure 20 or the guide structure 10 is deformed, only the guide structure 10 and the separation structure 20 need to be replaced, and the handle can be used as is, thereby saving costs.

[0043] Up to now, each embodiment of the present application has been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art will not be described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions claimed herein.

[0044] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are for illustrative purposes only and do not limit the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced with equivalents without departing from the scope and spirit of the present application. In particular, various technical features described in each embodiment can be combined in any manner as long as there is no structural contradiction. [Explanation of symbols]

[0045] 10 Guide structure 11 First guide rail, 12 Restriction groove, 20 Separate structure, 21 circular arc surfaces, 22 second guide rail, 23 1st transition plane, 24 second transition plane, 25 limit projection, 30 Tapered structure, 40 Handle structure.

Claims

1. A multi-function arthroscopic approach guide rod, a guide structure (10) having a first guide rail (11) along which the puncture needle slides; a separation structure (20) connected to the guide structure (10), the separation structure (20) having an arcuate surface (21) at an end of the separation structure (20) away from the guide structure (10), the separation structure (20) having a second guide rail (22) along which the puncture needle slides, the second guide rail (22) being connected to the first guide rail (11).

2. 2. The multifunctional arthroscopic approach guide rod of claim 1, wherein the separation structure (20) includes a first transition surface (23) and a second transition surface (24), the first transition surface (23) is connected to the guide structure (10) and connected to the arcuate surface (21), and the second transition surface (24) is connected to the guide structure (10) and connected to the arcuate surface (21), and the distance between the first transition surface (23) and the second transition surface (24) continuously decreases in a direction toward or away from the guide structure (10).

3. 3. The multifunctional arthroscopic approach guide rod according to claim 2, wherein the second guide rail (22) is located on the first transition surface (23), a first end of the second guide rail (22) is connected to the first guide rail (11), and a second end of the second guide rail (22) penetrates the apex of the arc of the arc surface (21).

4. 3. The multifunctional arthroscopic approach guide rod according to claim 2, wherein the minimum distance between the first transition surface (23) and the second transition surface (24) is 1 mm.

5. The multifunctional arthroscopic approach guide rod according to claim 1, characterized in that there are two separation structures (20), and the two separation structures (20) are respectively installed at both ends of the guide structure (10).

6. 2. The multifunctional arthroscopic approach guide rod according to claim 1, wherein the bottom surface of the first guide rail (11) and the bottom surface of the second guide rail (22) are located on the same plane.

7. The multifunctional arthroscopic approach guide rod according to claim 1, wherein the outer wall of the guide structure (10) is a cylindrical surface.

8. 8. The multifunctional arthroscopic approach guide rod according to claim 7, wherein the projected width of the arcuate surface (21) along the axis of the cylindrical surface is greater than the projected width of the cylindrical surface of the guide structure (10) along the axis of the cylindrical surface.

9. The multifunctional arthroscopic approach guide rod according to claim 1, further comprising a tapered structure (30) connected to the end of the guide structure (10) away from the separation structure (20).

10. 2. The multifunctional arthroscopic approach guide rod according to claim 1, wherein the depth of the second guide rail (22) continuously decreases in a direction toward and away from the guide structure (10).

Images