Multifunctional arthroscopic access guide rod

Abstract

Multifunctional arthroscopic access guide rod, characterized in that it comprises: a guide structure (10), wherein the guide structure (10) has a first guide rail (11) provided for the sliding movement of a puncture needle; a separating structure (20), wherein the separating structure (20) is connected to the guide structure (10), the end of the separating structure (20) remote from the guide structure (10) has a curved surface (21), and the separating structure (20) has a second guide rail (22) which is also provided for the sliding movement of the puncture needle, wherein the second guide rail (22) is connected to the first guide rail (11).

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of arthroscopic treatment devices, in particular a multifunctional arthroscopic access guide rod. STATE OF THE ART

[0002] Hip injuries such as femoroacetabular impingement syndrome (FAI), which are caused by sports activities, are common in young and adult athletes. With the continuous development of minimally invasive arthroscopic surgical techniques, traditional open surgical treatment methods are increasingly being replaced by hip arthroscopy, which has become the primary method for the surgical treatment of sports-related hip injuries. Hip arthroscopy has significant advantages such as minimal trauma, rapid postoperative recovery, and few complications. Treatment outcomes are significantly improved compared to open surgery. However, significant technical difficulties still exist with hip arthroscopy; the learning curve is long, and mastery of the technique is challenging, particularly for the surgeon.This leads to a certain limitation in the spread of hip arthroscopy and to a certain instability of surgical results in patients.

[0003] Establishing access for hip arthroscopy is the first technical challenge for the surgeon. Only when access is successfully established can the subsequent surgical steps be performed. There are two main causes of this challenge: the narrow joint space of the hip joint and the surrounding dense muscle and fatty tissue. The hip joint is a ball-and-socket joint in which the femoral head and the cartilage surface of the acetabulum lie closely together under negative pressure. During surgery, the lower extremity must be pulled to open the joint space. However, the gap is only 8 to 10 millimeters and is very narrow. It is extremely difficult to precisely localize this gap. At the same time, the surrounding muscle and fatty tissue make it difficult for the surgeon to quickly locate the joint space by palpation, which further complicates the establishment of access.

[0004] The traditional solution relies on fluoroscopy, which involves locating the joint space and inserting a puncture needle in an approximate direction. The fluoroscopy is then used to verify that the puncture needle is accurately positioned. This process often requires repeated procedures, is complicated and time-consuming, increases radiation exposure, and can damage the muscles, nerves, and blood vessels around the hip joint, leading to complications. Therefore, there is an urgent need for a device that can quickly and precisely access the joint cavity without fluoroscopy while simultaneously bluntly dissecting the surrounding tissue.

[0005] In fact, the hip joint is surrounded by a tough joint capsule that forms a sealed cavity. When the lower extremity is pulled to open the joint space of the hip joint, the sustained negative pressure in the joint cavity causes the part of the joint capsule closest to the joint space to deform and deepen into the joint cavity. This feature provides an effective basis for locating the joint space of the hip joint. Because the hip joint is surrounded by thick muscle and fatty tissue, this depression cannot be directly perceived by palpation. The inventors have developed a device based on this principle to quickly and precisely find correct access to the joint cavity without the need for X-ray imaging. After further improvement, the device is also capable of bluntly dissecting the tissues surrounding the hip joint, thus avoiding damage to the surrounding structures. CONTENT OF THIS APPLICATION

[0006] The object of the present application is to solve the problems of complicated and time-consuming procedures, excessive radiation exposure and possible damage to the tissues around the hip joint when establishing an access for hip arthroscopy.

[0007] The problem is solved by a multifunctional arthroscopic access guide rod according to the present application.

[0008] The multifunctional arthroscopic access guide rod comprises a guide structure and a separating structure, wherein the guide structure has a first guide rail provided for the sliding movement of a puncture needle; the separating structure is connected to the guide structure, the end of the separating structure remote from the guide structure has a curved surface, and the separating structure has a second guide rail, which is also provided for the sliding movement of the puncture needle, wherein the second guide rail is connected to the first guide rail.

[0009] In some embodiments, the separation structure comprises a first transition surface and a second transition surface, wherein the first transition surface is connected to the guide structure, the first transition surface is connected to the curved surface, the second transition surface is connected to the guide structure, and the second transition surface is connected to the curved surface, and wherein the distance between the first transition surface and the second transition surface decreases in the direction from proximity to distance from the guide structure.

[0010] In some embodiments, the second guide rail is disposed on the first transition surface, the first end of the second guide rail is connected to the first guide rail, and the second end of the second guide rail extends beyond the apex of the curved 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, two separation structures are provided, each arranged at either end of the guide structure.

[0013] In some embodiments, the bottom surfaces of the first guide rail and the second guide rail are in the same plane.

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

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

[0016] In some embodiments, the multifunctional arthroscopic access guide rod further comprises a conical 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 in the direction from proximity to distance from the guide structure.

[0018] With the above technical solutions, when using the multifunctional arthroscopic access guide rod provided in the present application, the joint space of the hip joint is first widened to 8 to 10 millimeters by pulling the lower extremity. Then, one end with a separating structure is inserted into the area around the hip joint through a surgical incision. Using the separating structure of the multifunctional arthroscopic access guide rod, the tissues around the joint capsule of the hip joint, such as the muscles, nerves, and blood vessels, are bluntly separated. The separating structure is moved in the area of the joint capsule of the hip joint until a depression is reached on the surface of the joint capsule. When the depression with the separating structure is pressed, elasticity and a feeling of emptiness can be perceived. This point is referred to as a "soft spot."At this point, the separation structure is positioned at an outer position corresponding to the spread joint space of the hip joint. At this position, the puncture needle is inserted along the first guide rail and glides through the first guide rail to the second guide rail. The puncture needle pierces the joint capsule and enters the joint space. A guide wire and an exchange rod are inserted one after the other along the path determined by the puncture needle. After expanding the diameter of the access path, an access groove is inserted to establish access. Since the end of the separation structure far from the guide structure is designed as a curved surface, it can bluntly separate the tissues surrounding the joint capsule of the hip joint, thus avoiding damage to the muscles, nerves, and blood vessels.At the same time, it facilitates the subsequent, clearer location of the "soft spot" on the surface of the joint capsule. At the same time, medical personnel can assess, by touch, whether the separating structure has reached the external position corresponding to the joint space of the hip joint without relying on X-ray fluoroscopy, which significantly improves the efficiency of locating the joint space and the accuracy of the puncture. The technical solutions of the present application effectively solve the problems of complicated and time-consuming procedures, excessive radiation exposure, and potential damage to the tissues surrounding the hip joint when establishing access for hip arthroscopy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in embodiments of the present application or in the related art, the accompanying drawings necessary for describing the embodiments and the related art are briefly presented below. It is obvious that the accompanying drawings in the following description are some embodiments of the present application, and a person skilled in the art can obtain other accompanying drawings based on these drawings without performing any creative work. Fig. 1 shows a schematic representation of a multifunctional arthroscopic access guide rod in an embodiment I of the present application. Fig. Figure 2 shows a schematic representation of the working state of the multifunctional arthroscopic access guide rod from Fig. 1. Fig. Figure 3 shows a main view of the multifunctional arthroscopic access guide rod from Fig. 1. Fig. 4 shows a top view of the multifunctional arthroscopic access guide rod from Fig. 1. Fig. 5 shows an enlarged partial plan view of a separating structure of the multifunctional arthroscopic access guide rod of Fig. 1. Fig. Figure 6 shows a partial sectional view of the multifunctional arthroscopic access guide rod of Fig. 1. Fig. 7 shows a partial sectional view of a multifunctional arthroscopic access guide rod in an embodiment II of the present application. Fig. 8 shows a top view of a multifunctional arthroscopic access guide rod in an embodiment III of the present application. Fig. 9 shows a right view of a guide structure of a multifunctional arthroscopic access guide rod in an embodiment IV of the present application. Fig. 10 shows a left view of a separating structure of the multifunctional arthroscopic access guide rod of Fig. 9. Fig. 11 shows a schematic representation of a limiting projection of the multifunctional arthroscopic access guide rod of Fig. 9. Fig. 12 shows a top view of a multifunctional arthroscopic access guide rod in an embodiment V of the present application. List of reference symbols:

[0020] 10, guide structure; 11, first guide rail; 12, limiting groove; 20, separating structure; 21, curved surface; 22, second guide rail; 23, first transition surface; 24, second transition surface; 25, limiting projection; 30, conical structure; 40, handle structure. DETAILED DESCRIPTION

[0021] Specific embodiments of the present application are described in more detail below in conjunction with the accompanying drawings and exemplary embodiments. The detailed description of the following exemplary embodiments and the accompanying drawings serve to illustrate the principles of the present application by way of example, but are not intended to limit the scope of this application. This application may be implemented in many different forms and is not limited to the specific embodiments described herein, but encompasses all technical solutions that fall within the scope of the claims.

[0022] This application provides these embodiments to make this application thorough and complete, and to fully explain the scope of this application to those skilled in the art. It should be noted that the relative arrangement of the components and steps set forth in these embodiments, the composition of materials, numerical expressions, and numerical values are intended to be exemplary and not limiting unless expressly stated otherwise.

[0023] It should be noted that in the description of the present application, unless otherwise stated, the term "plural" means greater than or equal to two. The terms "top," "bottom," "left," "right," "inside," "outside," etc., are used merely to indicate directional or positional relationships to facilitate understanding and simplify the description of this application. However, they do not indicate or imply that the devices or elements in question must have a particular orientation or must be constructed and operated in a particular orientation, and therefore should not be construed as limitations on the present application. If the absolute position of the described object changes, the relative position may also change accordingly.

[0024] Furthermore, terms such as "first," "second," and similar expressions used in this application do not indicate order, quantity, or importance, but merely serve to distinguish different parts. "Vertical" does not mean exact verticality in the strict sense, but rather an alignment within a permissible tolerance range. "Parallel" does not mean exact parallelism in the strict sense, but rather an alignment within a permissible tolerance range. "Comprise" or "include" and similar terms mean that the elements listed before the term include the elements listed after the term, without, however, excluding the possibility that other elements may also be included.

[0025] It should also be noted that in the description of the present application, the terms "attach," "connect," and "join" are to be understood in their broadest sense. For example, it may be a fixed connection, a detachable connection, or a one-piece connection; it may be a direct connection or an indirect connection via an intermediate medium. Those skilled in the art will be able to understand the specific meaning of the above terms in the present application in certain cases. When a particular component is described as being between a first component and a second component, intermediate components may or may not be present between the particular component and the first or second component.

[0026] All terms used in this application have the same meaning as understood by one skilled in the art, unless expressly defined otherwise. It should also be understood that terms defined in general dictionaries should be interpreted in accordance with their meaning in the context of the relevant art, and not in an idealized or extremely formal manner, unless expressly defined so herein.

[0027] Technologies, methods, and devices known to those skilled in the art may not be discussed in detail, but should be considered part of the description where appropriate.

[0028] As in Fig. 1 to Fig. 6, an embodiment I of the present application discloses a multifunctional arthroscopic access guide rod comprising a guide structure 10 and a separating structure 20. The guide structure 10 has a first guide rail 11 provided for the sliding movement of a puncture needle. The separating structure 20 is connected to the guide structure 10, and the end of the separating structure 20 remote from the guide structure 10 has a curved surface 21. The separating structure 20 has a second guide rail 22, which is also provided for the sliding movement of the puncture needle, wherein the second guide rail 22 is connected to the first guide rail 11.

[0029] According to the technical solutions of Example I, the joint space of the hip joint is first widened to 8 to 10 millimeters by pulling the lower extremity. Then, one end with a separating structure 20 is inserted into the area around the hip joint through a surgical incision. Using the separating structure 20 of the multifunctional arthroscopic access guide rod, the tissues around the joint capsule of the hip joint, such as the muscles, nerves, and blood vessels, are bluntly separated. The separating structure 20 is moved in the area of the joint capsule of the hip joint until a depression is reached on the surface of the joint capsule. When the depression is pressed with the separating structure, elasticity and a feeling of emptiness can be perceived. This point is referred to as the "soft spot." At this point, the separating structure 20 is located at an outer position corresponding to the expanded joint space of the hip joint.At this position, the puncture needle is inserted along the first guide rail 11 and glides along the first guide rail 11 to the second guide rail 22. The puncture needle pierces the joint capsule and enters the joint space. A guide wire and a replacement rod are inserted one after the other along the path determined by the puncture needle. After expanding the diameter of the access path, an access channel is inserted to establish access. Since the end of the separation structure 20 remote from the guide structure 10 is designed as a curved surface 21, it can bluntly separate the tissues surrounding the joint capsule of the hip joint, thereby avoiding damage to the muscles, nerves, and blood vessels. At the same time, it facilitates the subsequent, clearer location of the "soft spot" on the surface of the joint capsule.At the same time, medical personnel can assess by touch whether the separating structure 20 has reached the external position corresponding to the joint space of the hip joint without relying on X-ray fluoroscopy, which significantly improves the efficiency of locating the joint space and the accuracy of the puncture. The technical solutions of Example I effectively solve the problems of complicated and time-consuming procedures, excessive radiation exposure, and potential damage to the tissues surrounding the hip joint when establishing access for hip arthroscopy.

[0030] It should be noted that the above-mentioned guide structure 10 corresponds to the access guide rod described in a previous application, the partition structure 20 corresponds to the tongue-blade-like structure described in the previous application, the first guide rail 11 and the second guide rail 22 correspond to the open grooves described in the previous application, and the curved surface 21 corresponds to the outer curved surface of the tongue-blade-like structure from the previous application. Along the direction from the center to the outer regions of the curved surface 21, the distance between the curved surface 21 and the guide structure 10 continuously decreases, and the curved surface 21 is a smooth surface.

[0031] As in Fig. 1 to Fig. 6, the separation structure 20 according to the technical solutions of Embodiment 1 includes a first transition surface 23 and a second transition surface 24. The first transition surface 23 is connected to the guide structure 10, the first transition surface 23 is connected to the curved surface 21, the second transition surface 24 is connected to the guide structure 10, and the second transition surface 24 is connected to the curved surface 21. In the direction from the proximity to the distance from the guide structure 10, the distance between the first transition surface 23 and the second transition surface 24 continuously decreases. The above-mentioned first transition surface 23 and second transition surface 24 correspond to the upper and lower surfaces of the tongue-blade-like structure of the previous application.The curved surface 21 is smoothly connected to both the first transition surface 23 and the second transition surface 24 to avoid damage to the tissues surrounding the hip joint that could be caused by sharp protrusions on the separating structure 20. After the multifunctional arthroscopic access guide rod is inserted near the hip joint, the curved surface 21 rests against the muscle tissue attached to the surface of the joint capsule, with the peripheral muscle tissue of the hip joint located on both sides of the separating structure 20. As the multifunctional arthroscopic access guide rod slides, relative movement occurs between the muscle tissue attached to the surface of the joint capsule and the curved surface 21.Since the distance between the first transition surface 23 and the second transition surface 24 continuously decreases in the direction from proximity to distance from the guide structure 10 and both the first transition surface 23 and the second transition surface 24 are concave curved surfaces, the muscle tissue adhering to the surface of the joint capsule, together with the blood vessels and nerves therein, is gradually separated from the surface of the joint capsule by the continuous sliding of the multifunctional arthroscopic access guide rod and moves to the first transition surface 23 and the second transition surface 24.

[0032] As in Fig. 1 to Fig. 3, according to the technical solutions of Embodiment 1, the second guide rail 22 is arranged 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 extends beyond the apex of the curved surface 21. After the multifunctional arthroscopic access guide rod is placed in a suitable position, the first transition surface 23 is in contact with the external tissues, while the second transition surface 24 is in contact with the joint capsule. At this time, the apex of the curved surface 21 is located on the joint capsule at an outer position corresponding to the joint space. The second guide rail 22 arranged on the first transition surface 23 is oriented toward the external tissues.The second guide rail 22 divides the first transition surface 23 into two curved surfaces, and the second guide rail 22 is located in the center of the first transition surface 23. The puncture needle is positioned within the first guide rail 11, with the tip of the puncture needle resting against the underside of the first guide rail 11. The puncture needle is then slid along the first guide rail 11 into the second guide rail 22. After the tip of the puncture needle protrudes from the second end of the second guide rail 22, it pierces the joint capsule and enters the joint space, establishing access for hip arthroscopy. During this process, the tip of the puncture needle is always located either within the first guide rail 11 or the second guide rail 22 until the puncture needle pierces the joint capsule.The first guide rail 11 and the second guide rail 22 not only serve as a guide for the puncture needle during puncturing, but also prevent the puncture needle from puncturing other external tissues and thus damaging the blood vessels and nerves around the hip joint.

[0033] As in Fig. 1, Fig. 2, Fig. 4 and Fig. 5, the minimum distance between the first transition surface 23 and the second transition surface 24 according to the embodiment 1 is 1 mm. This minimum distance represents the minimum thickness of the end of the separating structure 20 remote from the guide structure 10. The minimum thickness is designated by "d". As shown in Fig. As shown in Figure 4, with a minimum distance of less than 1 mm between the first transition surface 23 and the second transition surface 24, the end of the separation structure 20 that first comes into contact with the joint capsule becomes more pointed. This can result in damage to the blood vessels and nerves around the hip joint during separation of the joint capsule from the surrounding tissues. However, if the minimum distance between the first transition surface 23 and the second transition surface 24 is greater than 1 mm, the sliding of the multifunctional arthroscopic access guide rod becomes difficult, hindering the separation of the joint capsule from the muscle tissue attached to it.

[0034] As in Fig. As shown in Figure 6, according to the technical solutions of Embodiment I, the undersides of the first guide rail 11 and the second guide rail 22 lie in the same plane. In Embodiment I, the plane is parallel to the horizontal plane, i.e., the depth of the first guide rail 11 is uniform throughout. This ensures a smooth connection between the first guide rail 11 and the second guide rail 22, allowing the movement of the puncture needle during insertion to be smooth and unhindered.

[0035] As in Fig. 1 to Fig. As shown in Figure 5, according to the technical solutions of Embodiment 1, the outer wall of the guide structure 10 is formed as a cylindrical surface. The outer surface of the cylindrical surface is free of edges to prevent secondary injuries that occur when the outer wall of the guide structure 10 comes into contact with the inner surface of the human wound. In other embodiments, the outer wall of the guide structure 10 may be formed as an elliptical cylindrical surface. In Embodiment 1, a guide structure 10 with a cylindrical outer surface is selected, whereby the guide structure 10 remains stable and difficult to rotate during surgery under the influence of external forces exerted by medical personnel.

[0036] As in Fig. 1 to Fig. 3, the projected width of the curved surface 21 along the axis of the cylindrical surface is greater than the projected width of the guide structure 10 along the axis of the cylindrical surface. Since the separation structure 20 is flat while the guide structure 10 is cylindrical and the thickness of the separation structure 20 is smaller than the diameter of the guide structure 10, the projected width of the curved surface 21 along the axis of the cylindrical surface is greater than the projected width of the guide structure 10 along the axis of the cylindrical surface. This ensures that the passage formed by the separation structure 20 after separation is large enough to allow the guide structure 10 to be inserted.

[0037] As in Fig. 1 to Fig. As shown in Figure 5, the multifunctional arthroscopic access guide rod according to the technical solutions of Embodiment 1 further comprises a conical structure 30, wherein the conical structure 30 is connected to the end of the guide structure 10 remote from the separating structure 20. The conical structure 30 has a third guide rail connected to the first guide rail 11, whereby the puncture needle can slide freely within the third guide rail, the first guide rail 11, and the second guide rail 22. In the direction from the proximity to the distance from the guide structure 10, the diameter of the conical structure 30 continuously decreases. The conical structure 30 can also be used to establish an arthroscopic access.The arrangement of the conical structure 30 makes it possible to establish the arthroscopic access through the two ends of the multifunctional arthroscopic access guide rod, thereby avoiding the problem that the multifunctional arthroscopic access guide rod becomes unusable due to deformation or damage at one end.

[0038] As in Fig. As shown in Figure 7, the difference between Embodiment II and Embodiment I is that the depth of the second guide rail 22 continuously decreases in the direction from proximity to distance from the guide structure 10. In the direction from proximity to distance from the separation structure 20, the depth of the first guide rail 11 continuously increases. The undersides of the first guide rail 11 and the second guide rail 22 form a seamlessly smooth plane. This ensures that the sliding action of the puncture needle is not impeded, while at the same time providing a certain initial angle for the penetration of the puncture needle, which facilitates the insertion of the puncture needle.

[0039] As in Fig. As shown in Figure 8, the difference between Embodiment III and Embodiment I is that two separation structures 20 are provided, wherein the two separation structures 20 are each arranged at both ends of the guide structure 10. The arrangement of the two separation structures 20 allows the two ends of the multifunctional arthroscopic access guide rod to be inserted into the wound opening to find the joint space, which facilitates operation by the medical personnel. The second guide rails 22 of the two separation structures 20 can be designed in different widths to allow the sliding of puncture needles of different sizes, which increases versatility.

[0040] As in Fig. 9 to Fig. 11, the difference between Embodiment IV and Embodiment I is that the separating structure 20 is detachably connected to the guide structure 10, the guide structure 10 has a limiting groove 12 on the end face facing the separating structure 20, and the separating structure 20 has a limiting projection 25 arranged correspondingly to the limiting groove 12. The limiting groove 12 comprises an arcuate groove, wherein one end of the arcuate groove has a blind hole. The orientation of the blind hole corresponds to the orientation of the arcuate groove. The limiting projection 25 comprises a connecting portion and a limiting portion, wherein the limiting portion is an arcuate element whose diameter corresponds to that of the arcuate groove. When assembling the separating structure 20 with the guide structure 10, the arcuate element is partially inserted into the arcuate groove.Subsequently, the separating structure 20 is rotated, causing the arcuate portion to slide along the arcuate groove and enter the blind hole. After the connecting portion abuts the end face of the arcuate groove closest to the blind hole, the rotation of the separating structure 20 is stopped. At this point, the connection between the separating structure 20 and the guide structure 10 is fully established.

[0041] If the separation structure 20 needs to be disassembled or replaced, it can be removed by rotating it in the opposite direction. In embodiment IV, the separation structure 20 can be replaced as needed to establish arthroscopic accesses of different sizes, thus increasing versatility.

[0042] As in Fig. 9 to Fig. 11, the width of the second guide rail 22 decreases continuously in the direction from the proximity to the distance from the guide structure 10. In order to adapt to puncture needles of different sizes, the width of the first guide rail 11 is greater than the diameter of the largest puncture needle. A corresponding separation structure 20 is provided according to each size of the puncture needle. The end of the second guide rail 22 of each separation structure 20 that is close to the first guide rail 11 has the same width as the first guide rail 11. The end of the second guide rail 22 of each separation structure 20 that is remote from the first guide rail 11 is designed in width according to the diameter of the respective puncture needle.This ensures that the puncture needle can slide while at the same time restricting its movement in a direction perpendicular to the side wall of the second guide rail 22 to prevent deviation of the puncture position.

[0043] As in Fig.As shown in Figure 12, the difference between Embodiment V and Embodiment I is that the multifunctional arthroscopic access guide rod includes a handle structure 40, wherein the handle structure 40 is connected to the guide structure 10 and arranged at the end of the guide structure 10 remote from the separation structure 20. The main body of the handle structure 40 is formed as an ellipsoid structure, which conforms to the ergonomic design. When grasping the handle structure 40, the contact area between the handle structure 40 and the hand is relatively large, which assists medical personnel in operation. The outer surface of the handle structure 40 is provided with a rubber layer, thereby increasing the friction coefficient to prevent slipping during operation.The guide structure 10 has a threaded portion at the end remote from the partition structure 20, and the handle structure 40 has a threaded hole matching the threaded portion. The handle structure 40 and the guide structure 10 are connected to each other via a thread. If deformation or other problems occur in the partition structure 20 or the guide structure 10, only the guide structure 10 and the partition structure 20 can be replaced, while the handle structure can continue to be used, thus saving costs.

[0044] The various embodiments of the present application have been described in detail. In order not to obscure the spirit of the present application, some details known in the art have been omitted. Those skilled in the art can fully understand how to implement the embodiments claimed herein from the above description.

[0045] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art will understand that the above examples are for illustrative purposes only and do not limit the scope of this application. Those skilled in the art should understand that the above embodiments may be modified, or some of the technical features may be substituted with equivalents without departing from the scope and spirit of this application. In particular, the technical features mentioned in the various embodiments may be arbitrarily combined, provided there are no structural conflicts.

Claims

[1] Multifunctional arthroscopic access guide rod, characterized by that it includes: a guide structure (10), wherein the guide structure (10) has a first guide rail (11) provided for the sliding movement of a puncture needle; a separating structure (20), wherein the separating structure (20) is connected to the guide structure (10), the end of the separating structure (20) remote from the guide structure (10) has a curved surface (21), and the separating structure (20) has a second guide rail (22) which is also provided for the sliding movement of the puncture needle, wherein the second guide rail (22) is connected to the first guide rail (11). [2] Multifunctional arthroscopic access guide rod according to claim 1, characterized byin that the separating structure (20) comprises a first transition surface (23) and a second transition surface (24), wherein the first transition surface (23) is connected to the guide structure (10), the first transition surface (23) is connected to the curved surface (21), the second transition surface (24) is connected to the guide structure (10), and the second transition surface (24) is connected to the curved surface (21), and wherein in the direction from the proximity to the distance from the guide structure (10), the distance between the first transition surface (23) and the second transition surface (24) decreases continuously. [3] Multifunctional arthroscopic access guide rod according to claim 2, characterized bythat the second guide rail (22) is arranged 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) extends beyond the apex of the curved surface (21). [4] Multifunctional arthroscopic access guide rod according to claim 2, characterized by that the minimum distance between the first transition surface (23) and the second transition surface (24) is 1 mm. [5] Multifunctional arthroscopic access guide rod according to claim 1, characterized by that two separating structures (20) are provided, wherein the two separating structures (20) are each arranged at both ends of the guide structure (10). [6] Multifunctional arthroscopic access guide rod according to claim 1, characterized bythat the undersides of the first guide rail (11) and the second guide rail (22) are in the same plane. [7] Multifunctional arthroscopic access guide rod according to claim 1, characterized by that the outer wall of the guide structure (10) is designed as a cylindrical surface. [8] Multifunctional arthroscopic access guide rod according to claim 7, characterized by that the projected width of the curved surface (21) along the axis of the cylindrical surface is greater than the projected width of the guide structure (10) along the axis of the cylindrical surface. [9] Multifunctional arthroscopic access guide rod according to claim 1, characterized by that it further comprises a conical structure (30), wherein the conical structure (30) is connected to the end of the guide structure (10) remote from the separating structure (20). [10] Multifunctional arthroscopic access guide rod according to claim 1, characterized bythat the depth of the second guide rail (22) decreases continuously in the direction from the proximity to the distance from the guide structure (10).

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