Semi-automatic minimally invasive graft tendon taking device for articular ligament reconstruction

Abstract

The invention belongs to the field of medical instruments, and relates to a semi-automatic minimally invasive graft tendon taking device for articular ligament reconstruction, which comprises a control handle and a hollow tendon taking rod, and the hollow tendon taking rod is connected with the end part of the control handle; a first through groove is formed in the middle of the control handle, and a push rod penetrates through the first through groove; a cutting edge is coaxially arranged in the hollow tendon taking rod; one end of the cutting edge abuts against the inner side wall of one end of the control handle and is connected with the push rod, and the other end of the cutting edge is a bendable end which is located at the tendon taking end of the hollow tendon taking rod. A cutting groove is formed in the inner side wall of the tendon taking end, and a guide curved surface is arranged opposite to the cutting groove; the push rod can drive the cutting edge to move towards the tendon taking end, so that the bendable end of the cutting edge is bent along the guide curved surface and then is meshed with the cutting groove, and the taken tendon is cut off. By means of the device, directional cutting can be achieved, then the obtained tendon can be completely stripped, and chronic pain caused by residues is prevented.

Description

Technical Field

[0001] This application belongs to the field of medical devices, and more specifically, relates to a semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction using graft tendons. Background Technology

[0002] Injuries and ruptures of joint ligaments commonly occur in sports injuries or traffic accidents. Joint ligaments play a vital role in maintaining the stability of various joints, especially the ligaments of the ankle, knee, and shoulder, and the incidence of injuries and ruptures is increasing year by year. Mild to moderate joint ligament injuries can be treated conservatively or with ligament repair, while severe injuries resulting in complete ligament tears usually require surgical treatment with grafts to restore joint stability.

[0003] Currently, joint ligament reconstruction can be categorized into autologous transplantation, allogeneic transplantation, and synthetic ligament transplantation based on the source of the graft. Autologous grafts remain the preferred choice for joint ligament reconstruction due to their high biocompatibility, lack of immune rejection and disease transmission risk, ease of acquisition, and rapid healing. While traditional push-in tendon harvesting instruments offer advantages such as ease of operation and low cost, their inherent limitations can significantly impact surgical outcomes and patient prognosis in clinical practice. Traditional manual tendon harvesting instruments are highly dependent on the surgeon's experience, relying entirely on tactile perception of the tendon-surrounding tissue interface. This makes them highly susceptible to misjudging the dissection path due to anatomical variations or tissue adhesions. Furthermore, the mechanical control of the instruments has significant limitations. The mechanical structure of traditional push-in dissectors makes it difficult to precisely adjust the dissection force. Improper force application (such as forceful pushing or angle deviation) can not only cause tendon fiber tearing or even complete rupture, resulting in insufficient graft length and affecting repair outcomes, but also potentially lead to postoperative aseptic inflammation or adhesion recurrence due to residual tendon debris. This instrument is poorly suited for complex cases. In cases of calcified tendinopathy, post-traumatic scar contracture, or anatomical abnormalities, traditional push-in tendon harvesting instruments often fail to achieve effective dissection due to a lack of directional cutting or dynamic adjustment capabilities. This necessitates a temporary switch to open surgery during the procedure, increasing trauma and anesthesia risks, and potentially exacerbating tissue damage due to the secondary manipulation. Incomplete dissection leading to residual fibrous bundles can become a potential cause of chronic pain or limited joint mobility. The iliotibial band on the lateral thigh is wide and thick, making it difficult to effectively dissect with push-in instruments. Significant force is required for separation, and complete removal is sometimes impossible. Currently, traditional open methods are still commonly used, increasing the risk of soft tissue injury and infection. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction, which aims to solve the problem that the existing push-in dissection and tendon harvesting devices lack directionality and directional cutting ability, resulting in easy dissection failure and difficulty in successful tendon harvesting.

[0005] To achieve the above objectives, this application provides a semi-automatic minimally invasive tendon harvesting device for tendon grafts used in joint ligament reconstruction, comprising: a control handle and a hollow tendon harvesting rod, wherein the hollow tendon harvesting rod is connected to the end of the control handle; a first through groove is provided on the middle part of the control handle, and a push rod is inserted through the first through groove; a cutting blade is coaxially provided inside the hollow tendon harvesting rod; one end of the cutting blade abuts against the inner sidewall of one end of the control handle and is connected to the push rod, and the other end is a flexible end, which is located at the tendon harvesting end of the hollow tendon harvesting rod; a cutting groove is formed on the inner sidewall of the tendon harvesting end, and a guide curved surface is provided opposite the cutting groove; the push rod can drive the cutting blade to move towards the tendon harvesting end, so that the flexible end of the cutting blade bends along the guide curved surface and engages with the cutting groove to cut the harvested tendon.

[0006] Furthermore, it also includes a traction slide bar, on which a second through groove is provided, and the second through groove is arranged parallel to the first through groove; the periphery of the second through groove is provided with a scale; the traction slide bar can be inserted into the tendon through the second through groove, and can move within the second through groove to adjust the cutting length of the tendon on the hollow tendon extraction rod.

[0007] Furthermore, the second through groove includes a pair and is symmetrically arranged on the side wall of the hollow tendon-retrieving rod, and the length of the traction slide rod is greater than the distance between the pair of second through grooves.

[0008] Furthermore, the hollow tendon-taking rod is a hollow elliptical cylindrical rod.

[0009] Furthermore, the end opening of the tendon-retrieving end of the hollow elliptical cylindrical rod is inclined relative to its rod wall, and the guide surface is located inside the side wall of the tendon-retrieving end near the control handle, while the cutting groove is located inside the side wall of the tendon-retrieving end away from the control handle.

[0010] Furthermore, the control handle is provided with an elastic element, which is located between the side wall of the control handle near the tendon harvesting end and the push rod, and can deform when the push rod moves toward the tendon harvesting end.

[0011] Furthermore, the elastic element is a spring.

[0012] Furthermore, the length of the first through groove is not less than the maximum deformation of the elastic element.

[0013] Furthermore, a guide limiting structure is provided on the inner wall of the hollow tendon-retrieving rod along its central axis, and the cutting blade is located within the guide limiting structure and can slide within the guide limiting structure.

[0014] Furthermore, the guide limiting structure is an elongated groove.

[0015] Overall, the technical solutions conceived in this application have the following beneficial effects compared with the prior art: (1) The semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction provided in this application integrates the functions of dissection and cutting. By pushing the push rod, the internal cutting blade can be driven to complete the cutting action. The flexible end of the cutting blade bends along the preset guide surface and finally engages precisely with the cutting groove. This design ensures that the cutting action path is controlled and predictable, and can achieve a clean and efficient cutting of the tendon in one go. This semi-automatic design simplifies the operation steps, shortens the operation time, improves the tendon harvesting efficiency, can better protect the tissues around the tendon, and reduce the occurrence of complications. At the same time, the directional cutting ability of the cutting end can completely dissect the harvested tendon and prevent residual tendons from causing chronic pain.

[0016] (2) This application solves the core pain points of traditional minimally invasive tendon harvesting surgery, such as blind operation, complicated steps, high cutting difficulty and high risk of tissue damage, through an integrated and semi-automated mechanical design, and achieves the goal of obtaining high-quality tendon grafts quickly, accurately and safely under minimally invasive conditions.

[0017] (3) This application also has a tendon length adjustment structure, that is, by the cooperation of the detachable traction slide and the second through groove, the tendon length can be adjusted to a suitable length. For the wide and thick iliotibial band or fascia lata, the length and diameter of the tendon to be better controlled, and minimally invasive tendon harvesting can be performed. At the same time, the trauma caused by open tendon harvesting or secondary tendon harvesting can be avoided, and a healthy, complete and undamaged strip-shaped tendon tissue for transplantation can be obtained.

[0018] (4) The elliptical cylindrical tendon harvesting rod of this application can avoid incomplete separation of the tendon and soft tissue at the front of the tendon harvesting device, which may lead to the tendon harvesting device becoming trapped in the soft tissue, resulting in tendon harvesting failure or even the need for cutting and removal. It can effectively separate the harvested tissue from the surrounding soft tissue, allowing it to pass through more smoothly and reducing unnecessary soft tissue damage. Moreover, the elliptical opening can distribute the pressure and cutting force more evenly over the entire circumference of the harvested tendon tissue, avoiding stress concentration. The long axis of the ellipse is more consistent with the direction of the tendon fiber, which can better maintain the natural direction of the tendon during advancement and rotation, preventing it from being excessively twisted, curled or knotted inside the device, which is conducive to obtaining a healthy, complete and undamaged tendon. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction provided in an embodiment of this application; Figure 2 This is a cross-sectional schematic diagram of a semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction during bite cutting, as provided in the embodiments of this application. Figure 4 This is a top view schematic diagram of a semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction provided in this application embodiment; Figure 5 This is a schematic diagram illustrating the tendon harvesting principle of a semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction provided in this application embodiment.

[0020] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1-Control handle, 11-First through groove, 12-Push rod, 13-Elastic element; 2-Hollow tendon-retrieving rod, 21-Cutting blade, 22-Cutting groove, 23-Guide surface, 24-Second through groove; 3-Traction slide bar. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] In this article, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The symbol " / " in this article indicates that the related objects are in an "or" relationship; for example, A / B means A or B.

[0023] The terms "first" and "second," etc., used in the specification and claims herein are used to distinguish different objects, not to describe a specific order of objects. For example, "first response message" and "second response message," etc., are used to distinguish different response messages, not to describe a specific order of response messages.

[0024] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0025] In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more, for example, multiple processing units means two or more processing units, multiple elements means two or more elements, etc.

[0026] The embodiments of this application are described below with reference to the accompanying drawings.

[0027] This embodiment provides a semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction, such as... Figures 1-4 As shown, the tendon retrieval device includes: a control handle 1 and a hollow tendon retrieval rod 2, the hollow tendon retrieval rod 2 being connected to the end of the control handle 1; a first through groove 11 is provided on the middle part of the control handle 1, and a push rod 12 is inserted through the first through groove 11; a cutting blade 21 is coaxially arranged inside the hollow tendon retrieval rod 2; one end of the cutting blade 21 abuts against the inner sidewall of one end of the control handle 1 and is connected to the push rod 12, and the other end is a bendable end, which is located at the tendon retrieval end of the hollow tendon retrieval rod 2; a cutting groove 22 is provided on the inner sidewall of the tendon retrieval end, and a guide surface 23 is provided opposite the cutting groove 22; the push rod 12 can drive the cutting blade 21 to move towards the tendon retrieval end, so that the bendable end of the cutting blade 21 bends along the guide surface 23 and engages with the cutting groove 22 to cut the retrieved tendon.

[0028] Specifically, the control handle 1 and the hollow tendon harvesting rod 2 can be connected by a precision threaded connection or a quick-release snap-fit ​​structure, or they can be manufactured as a single unit. The threaded connection ensures operational stability and precise force transmission; the quick-release snap-fit ​​structure facilitates postoperative disassembly, cleaning, and disinfection of the hollow tendon harvesting rod 2; and the single-unit structure provides greater stability and safety during operation. The shape of the control handle 1 can also be biomimetically designed to suit hand gripping posture, with a surface covered by anti-slip textures or a soft rubber coating, providing a stable grip and preventing slippage even in slippery environments stained with blood or saline solution.

[0029] The aforementioned control handle 1 can be made of high-strength engineering plastics (such as PEEK, polycarbonate) to reduce the overall weight.

[0030] The aforementioned hollow tendon harvesting rod 2 is made of medical-grade stainless steel (such as 304 or 316L) or titanium alloy to ensure that it has sufficient rigidity, toughness and corrosion resistance. The inner diameter of the hollow tendon harvesting rod 2 can be adjusted according to the actual application to be suitable for most tendons to be harvested.

[0031] Specifically, the thumb contact surface of the aforementioned push rod 12 is designed as a wide, grooved push button, which makes it convenient for the operator to apply pushing force with a single thumb finger, making the operation precise and effortless.

[0032] Specifically, the first through groove 11 is provided with precise scales (e.g., in millimeters) on both sides. The exposed end of the push rod can serve as a pointer, allowing the operator to clearly see the push rod's advance stroke, thereby indirectly determining the movement position of the internal cutting blade and achieving visual operation.

[0033] In other preferred embodiments, the push rod 12 is also provided with a limiting structure at the outer end of the first through groove 11. For example, the limiting structure may be a ring with a diameter greater than the width of the first through groove 11, a limiting cap, or a protrusion with a width greater than the width of the first through groove 11.

[0034] Specifically, the aforementioned cutting blade 21 can be made of super-elastic nickel-titanium alloy. This material has extremely high elastic limit and shape memory effect, which allows it to maintain sharp cutting force after bending significantly along the guide surface, and automatically restores its straight shape after being withdrawn without plastic deformation.

[0035] Specifically, the edge of the aforementioned cutting groove 22 is a sharp blade that has been precisely ground. When the flexible cutting blade 21 bends under the guidance of the guide surface 23 and engages with the cutting groove 22, its movement trajectory is similar to the shearing action of scissors, achieving a clean and neat shearing of the tendon, rather than squeezing or tearing, thus maximizing the protection of the quality of the tendon cross-section.

[0036] Specifically, the aforementioned guide surface 23 is a smooth concave surface optimized by fluid mechanics or bionics. Its radius of curvature is reasonably designed to ensure that the bending process of the cutting blade 21 is smooth and the resistance is minimal, and the stress distribution is uniform, avoiding breakage due to stress concentration.

[0037] In this embodiment, the tendon retrieval device further includes a traction slide bar 3. The hollow tendon retrieval bar 2 has a second through groove 24, which is parallel to the first through groove 11. The periphery of the second through groove 24 is marked with graduations, and one end of the second through groove 24 is close to the end of the tendon retrieval end, so that the tendon can be seen through the second through groove 24 after the tendon retrieval end is against the tendon. The traction slide bar 3 can be inserted into the tendon through the second through groove 24 and move within the second through groove 24 to traction the tendon and adjust the length of the tendon in the hollow tendon retrieval bar 2.

[0038] Specifically, the insertion end of the aforementioned traction slide bar 3 is pointed, which facilitates insertion into the tendon tissue, and the hand-held end is equipped with a circular handle for easy gripping and control.

[0039] The graduations on the periphery of the aforementioned second through groove 24 are precision graduations laser-engraved, with a minimum accuracy of 1mm. More specifically, after the tendon-retrieving end of the hollow tendon-retrieving rod 2 is pressed against the tendon, the traction slide rod 3 is inserted into the tendon, and then the traction slide rod is slid backward until the graduations on its body indicate that a sufficient length of tendon has been retrieved. Then, the graduations on the second through groove 24 are observed for final confirmation and fine-tuning.

[0040] More specifically, the aforementioned second through groove 24 includes a pair and is symmetrically arranged on the side wall of the hollow tendon-retrieving rod 2. The length of the traction slide rod 3 is greater than the distance between the pair of second through grooves 24, so that the determined tendon length is more accurate.

[0041] In this embodiment, the hollow tendon harvesting rod 2 is a hollow elliptical cylindrical rod. Using an elliptical cylindrical shape instead of a circular cylindrical shape has two main advantages: first, it better conforms to the anatomical shape near human bones (such as the patella and tibia), making insertion and operation easier; second, it can provide a larger internal space for the same circumference, making it easier to accommodate the tendon.

[0042] Specifically, the end opening of the hollow elliptical cylindrical rod is inclined relative to its rod wall. As a built-in peeler, the edge of the end opening is sharp. This oblique opening can easily separate the tendon from the surrounding connective tissue, further enhancing the integrated function of the tendon harvesting device. The guide surface 23 is located in the side wall of the tendon harvesting end near the control handle 1, and the cutting groove 22 is located in the side wall of the tendon harvesting end away from the control handle 1.

[0043] In this embodiment, an elastic element 13 is provided inside the control handle 1. The elastic element 13 is located between the side wall of the control handle 1 near the tendon harvesting end and the push rod 12, and can deform when the push rod 12 moves toward the tendon harvesting end.

[0044] Specifically, the elastic element 13 is a spring. The main function of the elastic element 13 (spring) is to provide an automatic reset function for the push rod 12 after cutting. When the push rod is released, the spring's rebound force will automatically push the push rod 12 back to its initial position, thereby causing the cutting blade 21 to withdraw from the cutting groove and return to a straight state, preparing for the next operation. At this time, one end of the cutting blade 21 will abut against the inner wall of the control handle 1. The elastic element provides a passive safety mechanism. When the tendon retrieval device is not in operation, the cutting blade is always in the retracted safe position, avoiding damage caused by accidental contact.

[0045] In this embodiment, the length of the aforementioned first through groove 11 is not less than the maximum deformation of the elastic element 13, ensuring that the stroke range of the push rod 12 is maximized.

[0046] In this embodiment, a guide limiting structure (not shown in the figure) is provided on the inner side wall of the hollow tendon harvesting rod 2 along its central axis. The cutting blade 21 is limited within the guide limiting structure and can slide along the central axis of the hollow tendon harvesting rod within the guide limiting structure.

[0047] Specifically, in this embodiment, the guide limiting structure is a long strip groove. This long strip groove can be an "I"-shaped groove or an "arc-shaped groove" machined on the inner wall of the hollow tendon-taking rod 2. The root of the cutting blade 21 is machined with a correspondingly shaped slider to cooperate and connect with it, ensuring that the cutting blade 21 can only move in a straight line along the central axis during the entire advancement process, without any rotation or radial offset. This enables the cutting blade to accurately align with and engage the cutting groove, ensuring the reliability and success rate of cutting.

[0048] The working principle of the foregoing embodiments of this application is as follows: Figure 5 As shown, the handheld control handle 1 is inserted into the tendon to be harvested object along the direction of the gray arrow until the tendon enters the hollow tendon harvesting rod 2. At this time, the push rod 12 can be directly pushed towards the tendon to be harvested object so that the flexible end of the cutting blade 21 bends along the guide surface 23 and engages with the cutting groove 22 to cut the harvested tendon; or, the traction slide rod 3 is inserted into the second through groove 24 on the side wall of the hollow tendon harvesting rod 2 to pierce the tendon. Then, the traction slide rod 3 is pulled towards the control handle 1 along the direction of the blue arrow in the figure in the second through groove 24 to control the length of the tendon entering the hollow tendon harvesting rod 2. After that, the push rod 12 is pushed towards the tendon to be harvested object so that the flexible end of the cutting blade 21 bends along the guide surface 23 and engages with the cutting groove 22 to cut the specific length of the harvested tendon.

[0049] It should be understood that expressions such as “comprising” and “may include” used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as “comprising” and / or “having” are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0050] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the components can rotate relative to each other after connection. "Sliding connection" refers to a connection where the components can slide relative to each other after connection. The directional terms mentioned in the embodiments of this application, such as "top," "bottom," "inner," "outer," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0051] Furthermore, the mathematical concepts mentioned in the embodiments of this application, such as symmetry, equality, parallelism, and perpendicularity, are limitations specific to the current technological level, rather than absolute and strict mathematical definitions. Slight deviations are permissible; approximations of symmetry, equality, parallelism, and perpendicularity are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0052] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction, characterized in that, include: A control handle (1) and a hollow tendon-retrieving rod (2) are provided. The hollow tendon-retrieving rod (2) is connected to the end of the control handle (1). A first through groove (11) is provided in the middle of the control handle (1), and a push rod (12) is inserted in the first through groove (11). A cutting blade (21) is coaxially provided in the hollow tendon-retrieving rod (2). One end of the cutting blade (21) abuts against the inner wall of one end of the control handle (1) and is connected to the push rod (12). The other end is a bendable end, which is located at the tendon-retrieving end of the hollow tendon-retrieving rod (2). A cutting groove (22) is provided on the inner wall of the tendon-retrieving end, and a guide surface (23) is provided opposite to the cutting groove (22). The push rod (12) can drive the cutting blade (21) to move towards the tendon-retrieving end, so that the bendable end of the cutting blade (21) bends along the guide surface (23) and engages with the cutting groove (22) to cut the retrieved tendon.

2. The semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction as described in claim 1, characterized in that, It also includes a traction slide bar (3), and the hollow tendon-retrieving rod (2) has a second through groove (24) and the second through groove (24) is arranged parallel to the first through groove (11); the periphery of the second through groove (24) is provided with a scale; the traction slide bar (3) can be inserted into the tendon through the second through groove (24) and move in the second through groove (24) to adjust the cutting length of the tendon in the hollow tendon-retrieving rod (2).

3. The semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction as described in claim 2, characterized in that, The second through groove (24) includes a pair and is symmetrically arranged on the side wall of the hollow tendon-retrieving rod (2). The length of the traction slide rod (3) is greater than the distance between the pair of second through grooves (24).

4. The semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction as described in claim 1, characterized in that, The hollow tendon-taking rod (2) is a hollow elliptical cylindrical rod.

5. The semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction as described in claim 4, characterized in that, The opening at the tendon-removing end of the hollow elliptical cylindrical rod is inclined relative to its rod wall, and the guide surface (23) is located in the side wall of the tendon-removing end near the control handle (1), while the cutting groove (22) is located in the side wall of the tendon-removing end away from the control handle (1).

6. The semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction as described in claim 1, characterized in that, The control handle (1) is provided with an elastic element (13), which is located between the side wall of the control handle (1) near the tendon extraction end and the push rod (12), and can deform when the push rod (12) moves toward the tendon extraction end.

7. The semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction as described in claim 6, characterized in that, The elastic element (13) is a spring.

8. The semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction as described in claim 6, characterized in that, The length of the first through groove (11) is not less than the maximum deformation of the elastic element (13).

9. The semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction as described in claim 1, characterized in that, The hollow tendon-removing rod (2) has a guide limiting structure on its inner side wall along its central axis. The cutting blade (21) is limited within the guide limiting structure and can slide within it.

10. The semi-automatic minimally invasive tendon harvesting device for joint ligament reconstruction as described in claim 9, characterized in that, The guide and limiting structure is a long strip groove.

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