Tendon taking device

Abstract

The utility model relates to a tendon taking device, and relates to the technical field of medical instruments, and the tendon taking device comprises a tendon taking device body, a hook-shaped open slot, a collection block for clamping a tendon in the open slot, a collection driving part for driving the collection block to slide, a cutting edge for cutting the tendon in the open slot, and a cutting driving part for driving the cutting edge to slide, and the expansion assembly is used for wrapping the open slot and conveniently expanding the dissected part. According to the device, the opening groove is wrapped by the expansion assembly and then extends into the dissection position for expansion, after expansion is completed, the expansion assembly slides to enable the opening groove to leak again, a tendon is conveniently placed in the opening groove, then the collection driving piece drives the collection block to clamp the tendon in the opening groove, and the tendon is collected. And then the cutting driving piece drives the cutting blade to cut the tendon in the open groove, and finally the key taking device is taken out and the cut tendon is taken out, so that the complexity of the operation process caused by mutual switching among various tools in the tendon taking process is reduced.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to a tendon harvesting device. Background Technology

[0002] With the advancement of medical technology in my country, various new medical devices are being applied to the medical field. In ACL or PCL reconstruction surgery, it is generally necessary to take autologous tendons such as hamstring tendons and quadriceps tendons.

[0003] In existing technologies, tendon harvesting typically involves dissecting soft tissue, expanding the dissected area, cutting the tendon, and finally collecting and removing the cut tendon to complete the tendon harvesting procedure.

[0004] However, this process requires the use of multiple tools, necessitating switching between them during tendon harvesting, which complicates the procedure and increases surgical costs. Utility Model Content

[0005] To reduce the complexity of the procedure caused by switching between multiple tools during tendon harvesting, this application provides a tendon harvesting device.

[0006] This application provides a tendon harvesting device, which adopts the following technical solution:

[0007] A tendon harvester includes a tendon harvester body, on the side of the tendon harvester body near the tendon having a hook-shaped opening groove for facilitating tendon placement, a collection block slidably disposed on the tendon harvester body to clamp the tendon within the opening groove, a collection drive component for driving the collection block to slide on the tendon harvester body, a cutting blade slidably disposed on the tendon harvester body to cut the tendon within the opening groove, a cutting drive component for driving the cutting blade to slide on the tendon harvester body, and an expansion component slidably disposed on the tendon harvester body to wrap around the opening groove and facilitate expansion of the anatomical site.

[0008] By adopting the above technical solution, the opening groove is wrapped by the expansion component, the tendon harvester is inserted into the anatomical site to expand it, and after the expansion is completed, the opening groove is exposed again by sliding the expansion component, which makes it easier to put the tendon into the opening groove. Then, the harvesting drive component drives the harvesting block to slide and clamp the tendon in the opening groove. Then, the cutting drive component drives the cutting blade to slide and cut the tendon in the opening groove. Finally, the tendon harvester is taken out, thereby bringing out the cut tendon and reducing the complexity of the operation process caused by switching between multiple tools during tendon harvesting.

[0009] Furthermore, the acquisition driver includes:

[0010] A collection connecting rod is slidably disposed within the body of the tendon harvester and connected to the collection block;

[0011] A collection push block is slidably mounted on the body of the tendon retrieval device and is used to push the collection connecting rod to slide.

[0012] A first compression spring is sleeved on the acquisition push block and is used to push the acquisition block to slide towards the opening slot.

[0013] By adopting the above technical solution, the first compression spring is used to push the collection block to clamp the tendon in the opening groove. When it is necessary to put the tendon into or take it out of the opening groove, the collection pushing block is pushed to move, thereby driving the collection connecting rod and the collection block to slide away from the opening groove.

[0014] Furthermore, the side of the collection block near the bottom of the opening slot is an inclined surface, and the distance between the bottom of the collection block and the bottom of the opening slot gradually decreases as it approaches the collection connecting rod.

[0015] By adopting the above technical solution, when the collection block slides towards the opening groove, the inclined surface pushes the tendon away from the collection connecting rod. At the same time, as the distance from the bottom of the opening groove decreases, the clamping and fixing effect of the collection block on the tendon is better.

[0016] Furthermore, a positioning protrusion is provided on the end of the acquisition block away from the acquisition connecting rod, and a positioning groove is provided on the body of the tendon extractor to cooperate with the positioning protrusion.

[0017] By adopting the above technical solution, when the acquisition block clamps onto the tendon in the opening groove, the positioning protrusion and the positioning groove cooperate to improve the sealing degree of the acquisition block on the top of the opening groove. At the same time, the positioning groove and the positioning protrusion limit the movement to prevent the acquisition block from sliding further away from the handle, thereby reducing the probability of damage to the tendon.

[0018] Furthermore, the expansion component includes:

[0019] An expansion sleeve is fitted onto the body of the tendon harvester and slides on the body of the tendon harvester. The expansion sleeve is used to wrap the opening groove and facilitate the expansion of the anatomical site.

[0020] An expansion drive is disposed on the body of the tendon harvester and is used to drive the expansion sleeve to slide.

[0021] By adopting the above technical solution, the expansion drive unit drives the expansion sleeve to wrap around the opening groove of the tendon harvester body, thereby expanding the anatomical site. After the anatomical site is expanded, the expansion drive unit drives the expansion sleeve to slide away from the opening groove, thereby exposing the opening groove, which facilitates subsequent operations and allows tendon cutting and harvesting to continue without removing the tendon harvester.

[0022] Furthermore, the tendon harvester body has a guide groove along its axial direction, and locking grooves perpendicular to the guide groove are respectively formed at both ends of the guide groove. The expansion drive includes:

[0023] A connecting sleeve, which is slidably disposed on the body of the tendon harvester and connected to the expansion sleeve;

[0024] A rotating ring is sleeved on the body of the tendon harvester and rotatably connected to the connecting sleeve. The rotating ring is provided with a locking rod that slides in a guide groove or a locking groove. After the locking rod enters the locking groove, the connecting sleeve cannot slide.

[0025] By adopting the above technical solution, the rotating ring is rotated so that the locking rod groove enters the guide groove. The connecting sleeve drives the expansion sleeve to slide and the locking rod slides in the guide groove. When the expansion sleeve slides to the designated position, the rotating ring is rotated so that the locking rod enters another set of locking grooves from the guide groove, thereby preventing the expansion sleeve from sliding during use.

[0026] Furthermore, the expansion sleeve includes:

[0027] A sliding sleeve is slidably disposed on the body of the tendon harvester;

[0028] The first expansion member is rotatably mounted on the sliding sleeve;

[0029] The second expansion member is rotatably mounted on the sliding sleeve. The first expansion member and the second expansion member are located on opposite sides of the tendon harvester body. The first expansion member and the second expansion member are slidably connected. The first expansion member and the second expansion member slide on the tendon harvester body with the sliding sleeve and wrap around the opening groove.

[0030] By adopting the above technical solution, when the sliding sleeve slides, the first expansion member and the second expansion member slide with the sliding sleeve. At the same time, the first expansion member and the second expansion member rotate simultaneously in the direction of moving away from or towards each other, thereby increasing or decreasing the width of the expansion sleeve. This makes it easier to increase the width of the expansion sleeve when wrapping the opening slot, and to reduce the width of the expansion sleeve when moving away from the opening slot, thus reducing the impact on other operations.

[0031] Furthermore, the first expansion member includes:

[0032] The first expansion block is rotatably mounted on the sliding sleeve and slides on the body of the tendon harvester along with the sliding sleeve.

[0033] The first support block has one end rotatably mounted on the tendon harvester body and the other end rotatably mounted on the end of the first expansion block away from the sliding sleeve. When the first expansion block moves toward the opening groove, the first support block drives the end of the first expansion block away from the sliding sleeve away from the tendon harvester body.

[0034] By adopting the above technical solution, when the first expansion block slides with the sliding sleeve toward the direction closer to the opening groove, the first support block causes the end of the first expansion block away from the sliding sleeve to rotate toward the direction away from the side wall of the tendon harvester body, thereby increasing the distance between the first expansion block and the side wall of the tendon harvester body; when the first expansion block slides with the sliding sleeve toward the direction away from the opening groove, the first support block causes the end of the first expansion block away from the sliding sleeve to rotate toward the direction closer to the side wall of the tendon harvester body, thereby decreasing the distance between the first expansion block and the side wall of the tendon harvester body.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. The opening groove is wrapped with an expansion sleeve, and the tendon harvester is inserted into the anatomical site to expand it. After expansion, the expansion sleeve is moved by the connecting sleeve to facilitate the placement of the tendon into the opening groove. Then, the harvesting pusher pushes the harvesting block to slide and clamp the tendon in the opening groove. Then, the cutting pusher pushes the cutting blade to slide and cut the tendon in the opening groove. Finally, the tendon harvester is taken out to bring out the cut tendon, reducing the complexity of the operation process caused by switching between multiple tools during tendon harvesting.

[0037] 2. Through the combined action of the first support block and the second support block, when the sliding block drives the first expansion block and the second expansion block to slide, the ends of the first expansion block and the second expansion block away from the sliding block are simultaneously pushed towards or away from the side wall of the tendon head. This achieves the goal of increasing the width of the expansion sleeve during use and decreasing the width of the expansion sleeve during contraction, thereby improving the practicality of the expansion sleeve. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the key extractor structure of Embodiment 1 of this application;

[0039] Figure 2 This is a schematic diagram of the key extractor structure of Embodiment 1 of this application, wherein the expansion component is not shown;

[0040] Figure 3 This is a schematic diagram of the tendon harvester structure according to Embodiment 1 of this application, wherein the body of the tendon harvester is viewed in cross section and the expansion component is not shown;

[0041] Figure 4 yes Figure 3 Enlarged diagram of section A in the middle;

[0042] Figure 5 This is a schematic diagram of the key extractor structure of Embodiment 2 of this application;

[0043] Figure 6 This is a schematic diagram of the key extractor structure of Embodiment 2 of this application, wherein the expansion sleeve is viewed in section and the expansion drive is not shown.

[0044] Reference numerals: 1. Tendon harvester body; 11. Handle; 12. Tendon harvesting head; 121. Opening groove; 122. Guide groove; 123. Locking groove; 2. Harvesting block; 21. Positioning protrusion; 3. Harvesting drive component; 31. Harvesting connecting rod; 32. First compression spring; 33. Harvesting pushing block; 4. Cutting blade; 5. Cutting drive component; 51. Cutting connecting rod; 52. Second compression spring; 53. Cutting pushing block; 6. Expansion assembly; 61. Expansion drive component; 611. Connecting sleeve; 612. Rotating ring; 7. Expansion sleeve; 71. Sliding sleeve; 72. First expansion component; 721. First expansion block; 722. First support block; 73. Second expansion component; 731. Second expansion block; 732. Second support block. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0046] This application discloses a tendon harvesting device.

[0047] Example 1

[0048] Reference Figure 1 and Figure 2 A tendon harvester includes a tendon harvester body 1. A hook-shaped opening groove 121 is provided on one end of the tendon harvester body 1 near the tendon to facilitate tendon placement. A collection block 2 is slidably disposed on the tendon harvester body 1 to clamp the tendon within the opening groove 121. A collection drive 3 is provided on the tendon harvester body 1 to drive the collection block 2 to slide. A cutting blade 4 is slidably disposed on the tendon harvester body 1 to cut the tendon within the opening groove 121. A cutting drive 5 is provided on the tendon harvester body 1 to drive the cutting blade 4 to slide. An expansion component 6 is slidably disposed on the tendon harvester body 1 to wrap around the opening groove 121 and facilitate expansion of the anatomical site.

[0049] Reference Figure 1 and Figure 2The tendon harvester body 1 includes a handle 11 and a tendon harvesting head 12. The tendon harvesting head 12 is fixedly installed on one end of the handle 11. A hook-shaped opening groove 121 is provided on the side of the tendon harvesting head 12 away from the handle 11. When in use, the end of the tendon harvesting head 12 away from the handle 11 is inserted into the tendon, and then the tendon is placed in the opening groove 121.

[0050] Reference Figure 2 The collection block 2 is slidably mounted on the tendon head 12. When the tendon is placed into the opening groove 121, the collection block 2 slides away from the handle 11. The collection block 2 presses against the end of the tendon away from the opening groove 121, thereby securing the tendon in the opening groove 121. In order to push the tendon to the designated position and secure it, the side of the collection block 2 near the bottom of the opening groove 121 is inclined. The distance between the bottom of the collection block 2 and the bottom of the opening groove 121 gradually decreases as it approaches the handle 11, thereby pushing the tendon into the opening groove 121 away from the handle 11 and fixing it. At the same time, in order to further improve the pushing effect on the tendon, the bottom of the opening groove 121 in this embodiment is also inclined. The inclination direction of the opening groove 121 is symmetrical to the inclination direction of the collection block 2, further increasing the magnitude of the decrease in the distance between the bottom of the collection block 2 and the bottom of the opening groove 121 as it approaches the handle 11.

[0051] Reference Figure 2 A positioning protrusion 21 is fixedly installed on the end of the collection block 2 away from the handle 11. The body 1 of the tendon harvester has a positioning groove that cooperates with the positioning protrusion 21. When the collection block 2 wants to slide away from the handle 11, the positioning protrusion 21 enters the positioning groove. The positioning groove guides the positioning protrusion 21, thereby improving the sealing degree of the collection block 2 on the top of the opening groove 121. At the same time, when the positioning protrusion 21 is fully entered into the positioning groove, the positioning groove and the positioning protrusion 21 limit it, thereby preventing the collection block 2 from continuing to slide away from the handle 11 and reducing the probability of the collection block 2 damaging the tendon.

[0052] Reference Figure 2 and Figure 3The acquisition drive component 3 is mounted on the tendon retrieval device body 1 and is used to drive the acquisition block 2 to slide. The acquisition drive component 3 includes an acquisition connecting rod 31, an acquisition pushing block 33, and a first compression spring 32. The acquisition connecting rod 31 is slidably installed inside the tendon retrieval device body 1, and the end of the acquisition connecting rod 31 away from the handle 11 is fixedly connected to the acquisition block 2. The acquisition pushing block 33 is slidably installed on the handle 11 and is fixedly connected to the acquisition connecting rod 31. When the acquisition pushing block 33 slides on the handle 11, it drives the acquisition connecting rod 31 to slide. The user can push the acquisition block 2 to slide by pushing the acquisition pushing block 33. The first compression spring 32 is fixedly installed on the acquisition pushing block 33. The two ends of the first compression spring 32 are respectively pressed against the acquisition pushing block 33 and the handle 11. The first compression spring 32 is in a compressed state and is used to push the acquisition block 2 and the acquisition connecting rod 31 to slide away from the handle 11, thereby pushing the acquisition block 2 to clamp the tendon in the opening groove 121.

[0053] Reference Figure 3 and Figure 4 The cutting blade 4 is slidably installed inside the tendon-retrieving head 12 and slides along the axis of the tendon-retrieving head 12 within the opening groove 121. When not in use, the cutting blade 4 retracts into the end of the tendon-retrieving head 12 away from the handle 11 to avoid cutting the tendon. The cutting drive component 5 is set on the tendon-retrieving device body 1 and is used to drive the cutting blade 4 to slide. The cutting drive component 5 includes a cutting connecting rod 51, a cutting pushing block 53, and a second compression spring 52. The cutting drive component 5 has a similar structure to the collection drive component 3 and does not interfere with each other. The cutting connecting rod 51 is slidably installed inside the tendon-retrieving device body 1. The cutting connecting rod 51 and the collection connecting rod 3 1. They are parallel to each other and do not interfere with each other; the cutting push block 53 is slidably installed on the handle 11, and the cutting push block 53 is fixedly connected to the cutting connecting rod 51. When the cutting push block 53 slides on the handle 11, it drives the cutting connecting rod 51 to slide. The user can push the cutting blade 4 to slide by pushing the cutting push block 53; the second compression spring 52 is fixedly installed on the cutting push block 53. The second compression spring 52 is in a compressed state and is used to push the cutting blade 4 and the cutting connecting rod 51 to slide away from the handle 11, so that the cutting blade 4 retracts into the tendon head 12 when not in use.

[0054] Reference Figure 1 and Figure 2 The expansion component 6 is slidably disposed on the tendon harvester body 1 and is used to wrap the opening groove 121. When the expansion component 6 wraps the opening groove 121, it facilitates the expansion of the anatomical site. The expansion component 6 includes an expansion sleeve 7 and an expansion drive 61. The expansion sleeve 7 is sleeved on the tendon harvester head 12. The expander slides on the tendon harvester head 12. The expansion sleeve 7 is used to wrap the opening groove 121. When the expansion sleeve 7 wraps the opening groove 121, the width of the tendon harvester head 12 away from the handle 11 increases, thereby facilitating the expansion of the anatomical site.

[0055] Reference Figure 1 and Figure 2 An expansion drive 61 is mounted on the tendon retrieval device body 1. The expansion drive 61 is used to drive the expansion sleeve 7 to slide. A guide groove 122 is provided on the tendon retrieval device body 1 along the axial direction. Arc-shaped locking grooves 123 perpendicular to the guide groove 122 are respectively provided at both ends of the guide groove 122. The expansion drive 61 includes a connecting sleeve 611 and a rotating ring 612. The connecting sleeve 611 is slidably mounted on the tendon retrieval device body 1. The end of the connecting sleeve 611 away from the handle 11 is fixedly connected to the expansion sleeve 7. The rotating ring 612 is sleeved on the tendon retrieval device body 1. On the body 1, a rotating ring 612 is rotatably connected to a connecting sleeve 611. A locking rod is fixedly installed on one end of the rotating ring 612 near the tendon retrieval device body 1. The locking rod cooperates with the guide groove 122 or the locking groove 123 and slides inside it. When the locking rod slides in the guide groove 122, the connecting sleeve 611 slides on the tendon retrieval device body 1. When the locking rod enters the locking groove 123, the connecting sleeve 611 is locked and cannot slide. The locking rod can be switched between the locking groove 123 and the guide groove 122 by rotating the rotating ring 612.

[0056] The working principle of Embodiment 1 of this application is as follows:

[0057] The opening groove 121 is wrapped by the expansion sleeve 7, and the tendon retrieval tool is inserted into the anatomical site to expand it. After expansion, the expansion sleeve 7 is moved by the connecting sleeve 611 to facilitate the placement of the tendon into the opening groove 121. Then, the collection push block 33 pushes the collection block 2 to slide and clamp the tendon in the opening groove 121. Then, the cutting push block 53 pushes the cutting blade 4 to slide and cut the tendon in the opening groove 121. Finally, the tendon retrieval tool is taken out to bring out the cut tendon, reducing the complexity of the operation process caused by switching between multiple tools during tendon retrieval.

[0058] Example 2

[0059] Reference Figure 5 and Figure 6 The difference between this embodiment and Embodiment 1 is that the expansion sleeve 7 includes a sliding sleeve 71, a first expansion member 72, and a second expansion member 73. The sliding sleeve 71 is slidably mounted on the tendon harvester body 1 and is fixedly connected to the connecting sleeve 611. The first expansion member 72 is rotatably mounted on the sliding sleeve 71 and slides on the tendon harvester body 1. The second expansion member 73 is rotatably mounted on the sliding sleeve 71. The first expansion member 72 and the second expansion member 73 are located on opposite sides of the tendon head 12. The first expansion member 72 is slidably mounted on the second expansion member 73. The first expansion member 72 and the second expansion member 73 slide on the tendon harvester body 1 with the sliding sleeve 71 and wrap around the opening groove 121 to facilitate expansion of the anatomical site.

[0060] Reference Figure 5 and Figure 6 The first expansion member 72 includes a first expansion block 721 and a first support block 722. One end of the first expansion block 721 is rotatably mounted on the end of the sliding sleeve 71 near the handle 11, and the first expansion block 721 slides on the tendon-retrieving head 12 with the sliding sleeve 71. The connecting sleeve 611 has a clearance groove for avoiding the first support block 722. One end of the first support block 722 is rotatably mounted on the tendon-retrieving head 12, and the other end of the first support block 722 is rotatably mounted on the end of the first expansion block 721. At one end of the sliding sleeve 71, when the sliding sleeve 71 moves the first expansion block 721 toward the opening groove 121, the first support block 722 moves the end of the first expansion block 721 away from the sliding sleeve 71 away from the tendon head 12, so as to facilitate the expansion of the dissected area; when the sliding sleeve 71 slides toward the handle 11, the first support block 722 moves the first expansion block 721 toward the side wall of the tendon head 12, and then adheres to the side wall of the tendon head 12.

[0061] Reference Figure 5 and Figure 6 The structure of the second expansion member 73 is similar to that of the first expansion member 72. The second expansion member 73 includes a second expansion block 731 and a second support block 732. One end of the second expansion block 731 is rotatably mounted on the end of the sliding sleeve 71 near the handle 11 and slides with the sliding sleeve 71. The second support block 732 is rotatably mounted on the side wall of the tendon head 12, and the other end of the second support block 732 is rotatably mounted on the end of the second expansion block 731 away from the sliding sleeve 71. The first expansion block 721 and the second expansion block 731 are slidably connected so that when the end of the first expansion block 721 and the second expansion block 731 away from the sliding sleeve 71 rotates towards or away from the side wall of the tendon head 12, the first expansion block 721 and the second expansion block 731 always remain connected.

[0062] Reference Figure 5 and Figure 6 When it is necessary to wrap the opening groove 121 of the tendon head 12, the connecting sleeve 611 drives the sliding sleeve 71 to slide away from the handle 11. Through the combined action of the first support block 722 and the second support block 732, the ends of the first expansion block 721 and the second expansion block 731 away from the sliding sleeve 71 rotate away from the side wall of the tendon head 12, thereby increasing the width of the expansion sleeve 7 and facilitating the expansion of the anatomical site. After the expansion is completed, the connecting sleeve 611 drives the sliding sleeve 71 to slide closer to the handle 11. Through the combined action of the first support block 722 and the second support block 732, the ends of the first expansion block 721 and the second expansion block 731 away from the sliding sleeve 71 rotate closer to the side wall of the tendon head 12, thereby reducing the width of the expansion sleeve 7 and minimizing the impact on subsequent operations.

[0063] The working principle of Embodiment 2 of this application is as follows:

[0064] By working together, the first support block 722 and the second support block 732 cause the sliding block to slide the first expansion block 721 and the second expansion block 731, pushing the ends of the first expansion block 721 and the second expansion block 731 away from the sliding block to slide towards or away from the side wall of the tendon head 12. This increases the width of the expansion sleeve 7 when in use and decreases the width of the expansion sleeve 7 when contracted, thereby improving the practicality of the expansion sleeve 7.

[0065] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tendon harvesting device, characterized in that: The device includes a tendon harvester body (1), which has a hook-shaped opening groove (121) on the side near the tendon to facilitate the placement of the tendon. A collection block (2) is slidably disposed on the tendon harvester body (1) to clamp the tendon in the opening groove (121). A collection drive (3) is disposed on the tendon harvester body (1) to drive the collection block (2) to slide. A cutting blade (4) is slidably disposed on the tendon harvester body (1) to cut the tendon in the opening groove (121). A cutting drive (5) is disposed on the tendon harvester body (1) to drive the cutting blade (4) to slide. An expansion component (6) is slidably disposed on the tendon harvester body (1) to wrap the opening groove (121) and facilitate the expansion of the anatomical site.

2. The tendon harvesting device according to claim 1, characterized in that: The acquisition driver (3) includes: A collection connecting rod (31) is slidably disposed inside the tendon harvester body (1) and connected to the collection block (2); A collection push block (33) is slidably disposed on the tendon retrieval device body (1) and used to push the collection connecting rod (31) to slide; The first compression spring (32) is sleeved on the acquisition push block (33) and is used to push the acquisition block (2) to slide towards the opening slot (121).

3. The tendon harvesting device according to claim 1, characterized in that: The bottom side of the collection block (2) near the bottom of the opening groove (121) is an inclined surface, and the distance between the bottom of the collection block (2) and the bottom of the opening groove (121) gradually decreases as it approaches the collection connecting rod (31).

4. The tendon harvesting device according to claim 3, characterized in that: The acquisition block (2) is provided with a positioning protrusion (21) at one end away from the acquisition connecting rod (31), and the tendon extractor body (1) is provided with a positioning groove that cooperates with the positioning protrusion (21).

5. A tendon harvesting device according to claim 1, characterized in that: The expansion component (6) includes: Expansion sleeve (7), the expansion sleeve (7) is fitted on the tendon harvester body (1) and slides on the tendon harvester body (1). The expansion sleeve (7) is used to wrap the opening groove (121) and facilitate the expansion of the anatomical site. An expansion drive (61) is disposed on the tendon harvester body (1) and is used to drive the expansion sleeve (7) to slide.

6. A tendon harvesting device according to claim 5, characterized in that: The tendon harvester body (1) has a guide groove (122) along the axial direction, and locking grooves (123) perpendicular to the guide groove (122) are respectively formed at both ends of the guide groove (122). The expansion drive (61) includes: Connecting sleeve (611), which is slidably disposed on the tendon harvester body (1) and connected to the expansion sleeve (7); A rotating ring (612) is sleeved on the tendon harvester body (1) and rotatably connected to the connecting sleeve (611). The rotating ring (612) is provided with a locking rod that slides in the guide groove (122) or the locking groove (123). After the locking rod enters the locking groove (123), the connecting sleeve (611) cannot slide.

7. A tendon harvesting device according to claim 5, characterized in that: The expansion sleeve (7) includes: Sliding sleeve (71), the sliding sleeve (71) is slidably disposed on the tendon harvester body (1); The first expansion member (72) is rotatably mounted on the sliding sleeve (71); The second expansion member (73) is rotatably mounted on the sliding sleeve (71). The first expansion member (72) and the second expansion member (73) are located on opposite sides of the tendon harvester body (1). The first expansion member (72) and the second expansion member (73) are slidably connected. The first expansion member (72) and the second expansion member (73) slide on the tendon harvester body (1) with the sliding sleeve (71) and wrap around the opening groove (121).

8. A tendon harvesting device according to claim 7, characterized in that: The first expansion member (72) includes: The first expansion block (721) is rotatably mounted on the sliding sleeve (71) and slides on the tendon harvester body (1) along with the sliding sleeve (71); The first support block (722) has one end rotatably mounted on the tendon harvester body (1) and the other end rotatably mounted on the end of the first expansion block (721) away from the sliding sleeve (71). When the first expansion block (721) moves toward the opening groove (121), the first support block (722) drives the end of the first expansion block (721) away from the sliding sleeve (71) away from the tendon harvester body (1).

Images