Tendon taking device
By designing a tendon retrieval device that combines a detachable shearing component with a push-shearing component, the problems of large incisions, difficult cutting, and high resistance in existing devices when extracting quadriceps tendons are solved, achieving labor-saving shearing and efficient tendon retrieval.
Patent Information
- Application Number
- CN202423015468.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Existing tendon harvesting devices have problems such as large surgical incisions, difficulty in harvesting, excessive cutting of autologous tissue, high cutting resistance and small lever arm when harvesting quadriceps tendons, which affect postoperative healing.
A tendon harvesting device was designed. By detachably connecting the first and second shearing components with the push-shearing component, the push-shearing component drives the relative movement between the two components, so that the shearing components cooperate, thereby increasing the shearing force and simplifying the operation.
This method makes tendon harvesting less strenuous, increases shearing force, reduces damage to autologous tissue, simplifies the procedure, and improves the accuracy and efficiency of tendon harvesting.
Smart Images
Figure CN223944456U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of medical devices, in particular to a tendon extraction device. BACKGROUND
[0002] ACL reconstruction is mainly used for repairing or replacing the anterior cruciate ligament in the human knee joint, and it has become the standard procedure for repairing cruciate ligament rupture. Most of them are reconstructed from autologous hamstring tendons, and some are reconstructed from bone tendon bone or quadriceps femoris. The latter two are stronger and larger than the hamstring tendon, so when using the existing extractor to extract part of the patellar bone of the quadriceps muscle to improve postoperative knee pain, there are still clinical pain points such as large surgical incision and difficult quadriceps muscle cutting. However, the existing extractor corresponding to the push-shear method needs to be pushed and sheared all the way to the muscle tissue for shearing, but the length of the cut is not required in the reconstruction procedure, so there is an excessive cutting phenomenon, and the autologous tissue is lost, which is not conducive to postoperative healing. Further, the existing extractor has large resistance when reaching the target position for shearing, small force arm, and is not easy to shear. CONTENT OF THE UTILITY MODEL
[0003] In order to solve the problems existing in the prior art, the present application provides a tendon extraction device technical scheme, that is, the connecting end of the first shearing member and the connecting end of the second shearing member are detachably connected with the push-shear end of the push-shear member, so as to drive the relative movement between the first shearing member and the second shearing member by using the push-shear member, and then the first shearing part and the second shearing part can be matched, so as to save labor in the process of tendon extraction, improve the shearing force of tendon extraction, and the structure is simple and convenient to operate.
[0004] The present application provides a tendon extraction device, which comprises a push-shear member and a tendon extraction assembly, and the push-shear end of the push-shear member is connected with the fixed end of the tendon extraction assembly.
[0005] The tendon extraction assembly comprises a first shearing member and a second shearing member, the second shearing member is sleeved outside the first shearing member, there is a gap between the first shearing member and the second shearing member, and the connecting end of the first shearing member and the connecting end of the second shearing member are detachably connected with the push-shear end of the push-shear member.
[0006] The shearing end of the first shearing member is provided with a first shearing part, the shearing end of the second shearing member is provided with a second shearing part, the shearing end is an end away from the connecting end, the push-shear member can drive the relative movement between the first shearing member and the second shearing member, and the relative movement between the first shearing member and the second shearing member can make the first shearing part and the second shearing part cooperate.
[0007] Further, the push-scissor piece comprises a first holding piece and a second holding piece, the first holding piece is hinged with the second holding piece, the push-scissor end of the first holding piece is detachably connected with the connecting end of the first shearing piece, the push-scissor end of the second holding piece is detachably connected with the connecting end of the second shearing piece, when the holding end of the first holding piece moves towards the direction where the holding end of the second holding piece is located, the first holding piece can drive the first shearing piece to move along the axial direction of the second shearing piece, and the holding end is oppositely arranged with the push-scissor end.
[0008] Further, the first holding piece and the second holding piece are both provided with anti-skid pieces, the anti-skid piece on the first holding piece is arranged on the side of the first holding piece away from the second holding piece, and the anti-skid piece on the second holding piece is arranged on the side of the second holding piece away from the first holding piece.
[0009] Further, the anti-skid piece on the first holding piece is arranged on the holding end of the first holding piece and extends towards the direction close to the push-scissor end, and the anti-skid piece on the second holding piece is arranged on the holding end of the second holding piece and extends towards the direction close to the push-scissor end.
[0010] Further, the first shearing part is provided with a shearing opening, and the shape of the shearing opening is V-shaped, oval-shaped or circular.
[0011] Further, the second shearing part is in a ring structure, the second shearing part is provided with a hook body, a tendon taking gap and a shearing matching body, the hook body, the tendon taking gap and the shearing matching body are in communication, the hook body extends away from one end of the connecting end and extends out of the second shearing part, the tendon taking gap is arranged on the side wall of the second shearing part in the ring structure and extends along the axial direction of the second shearing part, and the shearing matching body is inclined towards the inner side of the second shearing part.
[0012] Further, the outer side of the second shearing piece is provided with a measuring part, and the measuring part extends along the axial direction of the second shearing piece.
[0013] Further, the cross section of the first shearing piece is circular, oval, semicircular, triangular or rectangular, and the cross section of the second shearing piece is circular, oval, semicircular, triangular or rectangular.
[0014] Further, the shape of the shearing matching body is inverted V-shaped or groove-shaped.
[0015] Further, the first shearing piece is in a hollow ring structure, and the outer diameter of the first shearing piece in the hollow ring structure is 5mm-20mm.
[0016] The application is implemented, and has the following beneficial effects:
[0017] The application is implemented, and has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.
[0019] Figure 1 A structure schematic diagram of a tendon harvesting device provided for the embodiment of the application;
[0020] Figure 2 An exploded view of a tendon harvesting device provided for the embodiment of the application;
[0021] Figure 3 A structure schematic diagram of a first shearing part of a first shearing member provided for the embodiment of the application;
[0022] Figure 4 A structure schematic diagram of a second shearing part provided for the embodiment of the application;
[0023] Figure 5 A structure schematic diagram of a second shearing member provided for the embodiment of the application;
[0024] Figure 6 A structure schematic diagram of a second shearing part provided for the embodiment of the application;
[0025] Figure 7 A flowchart of a tendon harvesting process using the tendon harvesting device provided for the embodiment of the application;
[0026] In the drawings, the reference signs correspond to: 1 - a shearing member; 11 - a first gripping member; 12 - a second gripping member; 2 - a first shearing member; 21 - a first shearing part; 22 - a shearing opening; 3 - a second shearing member; 31 - a second shearing part; 32 - a hook body; 33 - a tendon harvesting gap; 34 - a shearing cooperation body; 35 - a fixing member; 36 - a fixing cooperation part; 4 - an anti-skid member; 5 - a connecting member. DETAILED DESCRIPTION
[0027] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.
[0028] It should be noted that, in the present application, unless specifically defined and limited, the terms such as "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For a person of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.
[0029] In the following, the embodiments are described with reference to the drawings, and the drawings do not limit the disclosure recorded in the claims in any way.
[0030] Please refer to Figures 1-7 , and the following Figures 1-7 A tendon taking device provided by the embodiments of the present application is described in detail.
[0031] The present application provides a tendon taking device, as shown in Figures 1-7 , specifically, the above-mentioned tendon taking device includes a push shear piece 1 and a tendon taking assembly, and the push shear end of the push shear piece 1 is connected with the fixed end of the tendon taking assembly.
[0032] The tendon taking assembly includes a first shear piece 2 and a second shear piece 3, the second shear piece 3 is sleeved outside the first shear piece 2, and there is a gap between the first shear piece 2 and the second shear piece 3. The connecting end of the first shear piece 2 and the connecting end of the second shear piece 3 are detachably connected with the push shear end of the push shear piece 1; the shear end of the first shear piece 2 is provided with a first shear part 21, and the shear end of the second shear piece 3 is provided with a second shear part 31. The shear end is the end away from the connecting end, the push shear piece 1 can drive the relative movement between the first shear piece 2 and the second shear piece 3, and the relative movement between the first shear piece 2 and the second shear piece 3 can make the first shear part 21 cooperate with the second shear part 31.
[0033] In this embodiment, the tendon retrieval device is used to extract tendons, which may be quadriceps tendons with part of the patella or hamstring tendons. Specifically, the push-scissor 1 in the tendon retrieval device is used to drive relative movement between the first shearing member 2 and the second shearing member 3, so that the first shearing member 2 and the second shearing member 3 cooperate with each other to cut the tendon. Furthermore, by detachably connecting the connecting ends of the first shearing member 2 and the second shearing member 3 to the push-scissor end of the push-scissor 1, the push-scissor 1 can drive relative movement between the first shearing member 2 and the second shearing member 3, thereby enabling the first shearing part 21 on the first shearing member 2 to cooperate with the second shearing part 31 on the second shearing member 3, making the tendon retrieval process more labor-saving, increasing the shearing force of the tendon retrieval, and having a simple structure that is easy to operate.
[0034] In one optional embodiment, the cross-section of the first shearing member 2 can be circular, elliptical, semi-circular, triangular, annular, or rectangular, etc., and the cross-section of the second shearing member 3 can be circular, elliptical, semi-circular, triangular, annular, or rectangular, etc. Here, the shape of the cross-section of the first shearing member 2 and the cross-section of the second shearing member 3 are not specifically limited.
[0035] In practical applications, the shape of the cross-section of the first shearing member 2 and the shape of the cross-section of the second shearing member 3 can be the same or different. For example, when the cross-section of the first shearing member 2 is circular, the cross-section of the second shearing member 3 can be triangular; or, when the cross-section of the first shearing member 2 is triangular, the cross-section of the second shearing member 3 can be circular; or, both the cross-sections of the first shearing member 2 and the cross-section of the second shearing member 3 are circular.
[0036] In some embodiments, such as Figure 2 , Figure 3 and Figure 5 As shown, the cross-sections of the first shearing member 2 and the second shearing member 3 are both annular, and the outer diameter of the first shearing member 2 is smaller than the inner diameter of the second shearing member 3. Therefore, when the second shearing member 3 is fitted outside the first shearing member 2, relative movement can occur between the first shearing member 2 and the second shearing member 3. Specifically, the first shearing member 2 can be a hollow annular structure, and the outer diameter of the first shearing member 2 with a hollow annular structure is 5mm-20mm. Preferably, the outer diameter of the first shearing member 2 is 5mm-15mm. The second shearing member 3 can be a hollow annular structure with a hollow structure, and the inner diameter of the second shearing member 3 is 5mm-20mm. Preferably, the inner diameter of the second shearing member 3 is 6mm-18mm.
[0037] In actual application, the shearing end of the second shearing member 3 is provided with a fixing member 35, the second shearing part 31 is provided with a fixing matching part 36, and then the fixing member 35 and the fixing matching part 36 are matched to realize the connection between the second shearing member 3 and the second shearing part 31. For example, the number of the fixing members 35 can be multiple, the fixing members 35 are uniformly arranged along the circumference of the second shearing member 3, the number of the fixing matching parts 36 can be multiple, and the fixing matching parts 36 are uniformly arranged along the circumference of the second shearing part 31. Specifically, the fixing member 35 is in the shape of a trapezoid, and the fixing matching part 36 is in the shape of an inverted trapezoid.
[0038] In a specific embodiment, the connecting end of the second shearing member 3 is provided with a connecting member 5, and then the second shearing member 3 is detachably connected with the push-shearing end of the second holding member 12 through the connecting member 5.
[0039] In an optional embodiment, as shown in Figure 1 and Figure 2 the push-shearing member 1 comprises a first holding member 11 and a second holding member 12, the first holding member 11 is hingedly connected with the second holding member 12, the push-shearing end of the first holding member 11 is detachably connected with the connecting end of the first shearing member 2, the push-shearing end of the second holding member 12 is detachably connected with the connecting end of the second shearing member 3, when the holding end of the first holding member 11 moves towards the direction where the holding end of the second holding member 12 is located, the first holding member 11 can drive the first shearing member 2 to move along the axial direction of the second shearing member 3, and the holding end and the push-shearing end are oppositely arranged.
[0040] In the embodiment, the user can hold the first holding member 11 and the second holding member 12, when the user holds the first holding member 11 and the second holding member 12 with force, the holding end of the first holding member 11 moves towards the direction where the holding end of the second holding member 12 is located, and then, since the push-shearing end of the first holding member 11 is detachably connected with the connecting end of the first shearing member 2, and the push-shearing end of the second holding member 12 is detachably connected with the connecting end of the second shearing member 3, the first holding member 11 can drive the first shearing member 2 to move along the axial direction of the second shearing member 3, the second holding member 12 can drive the second shearing member 3 to move along the axial direction of the first shearing member 2, that is, the relative movement between the first shearing member 2 and the second shearing member 3 can be driven, so that the first shearing part 21 cooperates with the second shearing part 31, and then the shearing can be realized while the force in the process of taking the tendon is reduced, and the shearing force in the process of taking the tendon is improved.
[0041] In another alternative embodiment, the push-scissor 1 can further comprise a gun-type holding member, wherein the push-scissor end of the gun-type holding member is detachably connected with the connecting end of the first scissor 2 and the connecting end of the second scissor 3, and the holding end of the gun-type holding member is provided with a driving mechanism, when the user presses the driving mechanism, the relative movement between the first scissor 2 and the second scissor 3 can be caused, and then the push-scissor process can also be realized.
[0042] In a specific embodiment, continuing to refer to Figure 1 and Figure 2 , the first holding member 11 and the second holding member 12 are both provided with anti-skid members 4, the anti-skid member 4 on the first holding member 11 is arranged on the side of the first holding member 11 away from the second holding member 12, and the anti-skid member 4 on the second holding member 12 is arranged on the side of the second holding member 12 away from the first holding member 11.
[0043] Specifically, by arranging the anti-skid members 4 on the first holding member 11 and the second holding member 12, the phenomenon of slipping during the push-scissor process can be avoided, and the stability of taking the tendon can be improved.
[0044] In actual application, the anti-skid member 4 on the first holding member 11 is arranged on the holding end of the first holding member 11 and extends towards the direction close to the push-scissor end, and the anti-skid member 4 on the second holding member 12 is arranged on the holding end of the second holding member 12 and extends towards the direction close to the push-scissor end, and then by arranging the anti-skid members 4 according to the above structure, the contact area between the hand and the anti-skid members 4 can be increased, and the anti-skid effect can be further improved.
[0045] In an alternative embodiment, as shown in Figure 2 and Figure 3 , the first scissor part 21 is provided with a scissor opening 22, wherein the shape of the scissor opening 22 is V-shaped, oval-shaped or circular-shaped.
[0046] Specifically, the end of the first scissor part 21 provided with the scissor opening 22 is in a beveled shape, and the scissor opening 22 is located on the side with a longer beveled shape, so as to cooperate with the scissor matching body 34 in the second scissor part 31 to cut the tendon.
[0047] In an alternative embodiment, please refer to Figure 1 and Figure 5 , the second scissor part 31 is in a ring structure, the second scissor part 31 is provided with a hook body 32, a tendon taking gap 33 and a scissor matching body 34, the hook body 32, the tendon taking gap 33 and the scissor matching body 34 are in communication, the hook body 32 extends towards the end away from the connecting end and extends out of the second scissor part 31, the tendon taking gap 33 is arranged on the side wall of the second scissor part 31 in the ring structure and extends along the axial direction of the second scissor part 31, and the scissor matching body 34 is inclined towards the inner side of the second scissor part 31.
[0048] Specifically, the hook end of the hook body 32 extends circumferentially along the second shearing part 31. The hook end of the hook body 32 is the end that does not contact the second shearing part 31. The hook body 32 can hook the tendon. When the user rotates the push shear 1 slightly, the tendon can be put into the receiving space formed by the tendon retrieval gap 33 and the shearing fitting body 34. The tendon can then be pushed forward in the direction of the tendon to cut the tendon of a preset length. At the same time, the resistance to tendon retrieval can be reduced and the accuracy of tendon retrieval can be improved.
[0049] In practical applications, the shearing portion of the shearing body 34 extends circumferentially along the second shearing portion 31. The extension direction of the shearing portion of the shearing body 34 is opposite to the extension direction of the hook end of the hook body 32. Furthermore, the shearing portion of the shearing body 34 is inclined toward the direction close to the central axis of the second shearing portion 31, thereby facilitating the engagement of the shearing opening 22 with the shearing body 34.
[0050] In some embodiments, such as Figure 6 As shown, the tendon is hooked up by the hook body 32, and then the tendon enters from end A. It is then advanced forward along the tendon harvesting gap 33 and the shearing mate 34, that is, from point B, thereby realizing the tendon harvesting process.
[0051] In an optional embodiment, the shearing mate 34 is shaped like an inverted V or a groove, wherein the shape of the shearing mate 34 needs to match the shape of the shearing opening 22 so that the shearing opening 22 and the shearing mate 34 cooperate to cut the tendon. For example, when the shape of the shearing opening 22 is V-shaped, the shape of the shearing mate 34 is inverted V-shaped, and when the shape of the shearing opening 22 is elliptical or circular, the shape of the shearing mate 34 is groove-shaped.
[0052] In one optional embodiment, a measuring portion is provided on the outer side of the second shear member 3, and the measuring portion extends along the axial direction of the second shear member 3.
[0053] Specifically, by setting a measuring part to extract the required tendon length, high-precision tendon extraction can be achieved. For example, the measuring part can be a scale extending along the axial direction of the second shearing member 3.
[0054] The following is combined with Figures 1-7 The tendon harvesting process of the tendon harvesting device is described.
[0055] Specifically, first, make a small transverse skin incision at the patellar attachment of the quadriceps tendon, separate the subcutaneous tissue from the quadriceps tendon, preserve the tendon's attachment to the proximal patella, and use a blade to cut the required diameter and depth of the quadriceps muscle at both sides of the tendon-bone junction, while maintaining the tendon-bone connection.
[0056] Secondly, the tendon is hooked by the hook body 32, and when the user slightly rotates the push cutter 1, the tendon can be sleeved into the accommodating space formed by the tendon taking gap 33 and the shearing cooperation body 34, so that the tendon can be pushed forward along the direction of the tendon to cut the tendon with a preset length.
[0057] Furthermore, when the required length position is reached, the first holding member 11 and the second holding member 12 are gripped with force to drive the relative movement between the first shearing member 2 and the second shearing member 3, and then the first shearing part 21 and the second shearing part 31 are sheared to cut the tendon.
[0058] Finally, the tendon is lifted in reverse, and the required patellar bone is cut at the tendon-bone attachment with a swing saw.
[0059] The detailed flowchart of the above steps can be seen in Figure 7 The complete tendon taking process is mainly to facilitate the cutting of the tendon with large thickness or width, and to improve the cutting accuracy. If the width or thickness of the cut tendon is small, the tendon can be hooked by the hook body 32 at the small incision, and directly pushed forward along the direction of the tendon. When the required length position is reached, the first holding member 11 and the second holding member 12 are gripped with force to drive the relative movement between the first shearing member 2 and the second shearing member 3, and then the first shearing part 21 and the second shearing part 31 are sheared to cut the tendon. The specific detailed flowchart can be seen in ③-⑥ in Figure 7 .
[0060] The above embodiments of the present application have the following beneficial effects:
[0061] The connecting end of the first shearing member and the connecting end of the second shearing member are detachably connected with the push and cut end of the push cutter, so that the first shearing member and the second shearing member are driven to move relatively by the push cutter, and then the first shearing part and the second shearing part are matched to make the tendon taking process more labor-saving, improve the shearing force of the tendon taking, and the structure is simple and convenient to operate.
[0062] The structure shown in the embodiment only relates to part of the structure of the present application scheme and does not constitute a limitation on the equipment to which the present application scheme is applied. The specific equipment can include more or fewer components than shown, or combine certain components, or have a different arrangement of components. It should be understood that the methods, devices, etc. disclosed in the embodiment can be implemented in other ways.
[0063] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A tendon harvesting device, characterized in that, It includes a push-shear component (1) and a tendon harvesting assembly, wherein the push-shear end of the push-shear component (1) is connected to the fixed end of the tendon harvesting assembly; The tendon harvesting assembly includes a first shearing member (2) and a second shearing member (3). The second shearing member (3) is sleeved on the outside of the first shearing member (2). There is a gap between the first shearing member (2) and the second shearing member (3). The connecting end of the first shearing member (2) and the connecting end of the second shearing member (3) are detachably connected to the pushing end of the pushing shearing member (1). The first shearing member (2) has a first shearing part (21) at its shearing end, and the second shearing member (3) has a second shearing part (31) at its shearing end. The shearing end is the end away from the connecting end. The push-shear member (1) can drive the first shearing member (2) and the second shearing member (3) to move relative to each other. The relative movement between the first shearing member (2) and the second shearing member (3) can make the first shearing part (21) and the second shearing part (31) cooperate.
2. The tendon harvesting device according to claim 1, characterized in that, The push-shear member (1) includes a first gripper (11) and a second gripper (12). The first gripper (11) and the second gripper (12) are hinged together. The push-shear end of the first gripper (11) is detachably connected to the connecting end of the first shear member (2). The push-shear end of the second gripper (12) is detachably connected to the connecting end of the second shear member (3). When the gripping end of the first gripper (11) moves toward the gripping end of the second gripper (12), the first gripper (11) can drive the first shear member (2) to move along the axial direction of the second shear member (3). The gripping end and the push-shear end are arranged opposite to each other.
3. The tendon harvesting device according to claim 2, characterized in that, Both the first grip (11) and the second grip (12) are provided with anti-slip parts (4). The anti-slip parts (4) on the first grip (11) are located on the side of the first grip (11) away from the second grip (12), and the anti-slip parts (4) on the second grip (12) are located on the side of the second grip (12) away from the first grip (11).
4. The tendon harvesting device according to claim 3, characterized in that, The anti-slip member (4) on the first grip (11) is disposed at the gripping end of the first grip (11) and extends toward the direction close to the push-shear end. The anti-slip member (4) on the second grip (12) is disposed at the gripping end of the second grip (12) and extends toward the direction close to the push-shear end.
5. The tendon harvesting device according to claim 1, characterized in that, The first shearing part (21) is provided with a shearing opening (22), and the shape of the shearing opening (22) is V-shaped, elliptical or circular.
6. The tendon harvesting device according to claim 1, characterized in that, The second shearing part (31) is an annular structure. The second shearing part (31) is provided with a hook (32), a tendon-retrieving gap (33) and a shearing fitting body (34). The hook (32), the tendon-retrieving gap (33) and the shearing fitting body (34) are connected. The hook (32) extends toward the end away from the connecting end and extends out of the second shearing part (31). The tendon-retrieving gap (33) is provided on the side wall of the second shearing part (31) which is an annular structure and extends along the axial direction of the second shearing part (31). The shearing fitting body (34) is inclined toward the inner side of the second shearing part (31).
7. The tendon harvesting device according to claim 1, characterized in that, The second shearing member (3) has a measuring part on its outer side, which extends along the axial direction of the second shearing member (3).
8. The tendon harvesting device according to claim 1, characterized in that, The cross-section of the first shearing piece (2) is circular, elliptical, semi-circular, triangular or rectangular, and the cross-section of the second shearing piece (3) is circular, elliptical, semi-circular, triangular or rectangular.
9. The tendon harvesting device according to claim 6, characterized in that, The shearing mate (34) is in the shape of an inverted V or a groove.
10. The tendon harvesting device according to claim 1, characterized in that, The first shearing member (2) is a hollow ring structure, and the outer diameter of the first shearing member (2) with a hollow ring structure is 5mm-20mm.