Tendon removal device

Abstract

The present invention relates to the technical field of medical devices, and in particular to a tendon harvesting device. The tendon harvesting device comprises two tendon harvesting parts, both of which comprise an extension rod, a cylinder and a handle, the cylinder and the handle being arranged at both ends of the extension rod, the two ends of the cylinder being open, an opening being arranged on one side wall of the cylinder, the opening penetrating the wall along the thickness direction of the wall in which it is located to communicate with the inner cavity of the cylinder, and penetrating the wall in the length direction of the cylinder. The outer contour size of the cylinder of one of the two tendon harvesting parts is smaller than the inner cavity size of the cylinder of the other tendon harvesting part, so that the two cylinders can be sleeved together, and the openings on the two cylinders can be staggered. Closed-mouth tendon harvesting can be adopted while retaining the tendon bone end attachment point, reducing the risk of tendon rupture and damage to normal tissue during tendon harvesting. The device is simple to operate, easy to assemble and use, can reduce the difficulty of work, save working time, and has a simple structure, which is convenient for postoperative cleaning and disinfection.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a tendon removal device. Background Art

[0002] In sports medicine and orthopedic surgery, patients with ligament or tendon injuries or ruptures often require native tendon reconstruction. (Explanation: One end of a tendon attaches to the bone, while the other continues with the muscle. During tendon harvesting, the muscle end is severed, while the bone end is either severed or retained, depending on the surgical procedure.)

[0003] In most cases, since there is no need to preserve the tendon's insertion at the bone end (such as in anterior cruciate ligament reconstruction and adult patellar dislocation), a closed tendon retriever can basically meet the surgical requirements. However, in some cases, such as using the semitendinosus transposition to reconstruct the medial collateral ligament or using the adductor magnus tendon to reconstruct the medial patellofemoral ligament in minors with patellar dislocation, it is necessary to preserve the tendon's insertion at the bone end, and in these cases, an open tendon retriever is required.

[0004] The open tendon harvesters currently commonly used in clinical practice do not have a complete closed loop, so they are prone to getting stuck in tendons, muscles, subcutaneous fat and other soft tissues as well as surrounding normal tissues during use, which leads to difficulties in the tendon harvesting process, premature tendon rupture, and damage to normal structures, thus failing to meet clinical needs. Some of the currently disclosed patents for tendon harvesting with bone-end retention (Chinese patent application with publication number CN111904487A) have the disadvantages of having a long cylinder that is not conducive to postoperative cleaning and disinfection, or failing to truly achieve closed-loop tendon harvesting, leading to tendon rupture. While closed-end tendon harvesters are significantly superior to open-end tendon harvesters in the tendon harvesting process (less likely to get stuck in soft tissues and tendon harvesting is smoother), when using a closed-end tendon harvester, the bone end attachment point of the tendon must first be severed. Based on this, there is an urgent need to develop a tendon harvesting device that can meet clinical needs. Summary of the Invention

[0005] The purpose of the present invention is to provide a tendon harvesting device which can adopt closed-mouth tendon harvesting while retaining the tendon bone end point.

[0006] In order to achieve the above object, the present invention provides a tendon removal device, characterized in that it comprises:

[0007] A first tendon removal portion includes a first extension rod, a first barrel, and a first handle, wherein the first barrel and the first handle are respectively provided at two ends of the first extension rod, the two ends of the first barrel are open, a first opening is provided on one side wall of the first barrel, the first opening penetrates the wall along the thickness direction of the wall and communicates with the inner cavity of the first barrel, and penetrates the wall along the length direction of the first barrel; and

[0008] The second tendon removal portion includes a second extension rod, a second barrel and a second handle, the second barrel and the second handle being respectively provided at both ends of the second extension rod, the two ends of the second barrel being open, a second opening being provided on one side wall of the second barrel, the second opening penetrating the wall along the thickness direction of the wall in which it is located to communicate with the inner cavity of the second barrel, and penetrating the wall along the length direction of the second barrel;

[0009] The outer contour size of the second cylinder is smaller than the inner cavity size of the first cylinder, so that the second cylinder can be inserted into the first cylinder and the first opening and the second opening can be staggered.

[0010] Optionally, the cross-sections of the first cylinder and the second cylinder are both circular.

[0011] Optionally, the second cylinder is truncated cone-shaped, and the inner cavity of the first cylinder is truncated cone-shaped; and / or

[0012] The distance between the outer side surface of the second cylinder and the inner cavity wall of the first cylinder is no more than 1 mm.

[0013] Optionally, one of the first handle and the second handle is provided with a connecting portion, and the other is provided with a limiting portion. When the second cylinder is inserted into the first cylinder and the connecting portion and the limiting portion can match to limit relative rotation between the first tendon retrieval portion and the second tendon retrieval portion, the first opening and the second opening are staggered.

[0014] Optionally, when the connecting portion matches the limiting portion to limit relative rotation between the first tendon retrieval portion and the second tendon retrieval portion, the offset angle between the first opening and the second opening is greater than 90° and less than 270°.

[0015] Further preferably, when the connecting portion matches the limiting portion to limit relative rotation between the first tendon retrieval portion and the second tendon retrieval portion, the offset angle between the first opening and the second opening is 180°.

[0016] Optionally, the connecting portion is a card block, and the limiting portion is a card slot matching the card block.

[0017] Optionally, when the second cylinder is inserted into the first cylinder, the first handle and the second handle can be connected by a fixing member to limit relative rotation between the first tendon removal part and the second tendon removal part.

[0018] Optionally, at least one of the first extension rod and the second extension rod is provided with a bend; and / or

[0019] At least one of the first extension rod and the second extension rod is provided with a scale line.

[0020] Optionally, the corners of the first tendon removal portion and the second tendon removal portion are rounded.

[0021] The above technical solution of the present invention has the following advantages: the tendon removal device provided by the present invention includes two tendon removal parts, and both tendon removal parts include an extension rod, a cylinder and a handle. The cylinder and the handle are arranged at both ends of the extension rod. The two ends of the cylinder are open, and an opening is arranged on one side wall of the cylinder. The opening penetrates the wall along the thickness direction of the wall to communicate with the inner cavity of the cylinder, and penetrates the wall in the length direction of the cylinder. The outer contour size of the cylinder of one of the two tendon removal parts is smaller than the inner cavity size of the cylinder of the other tendon removal part, so that the two cylinders can be installed together, and the openings on the two cylinders can be staggered. It is possible to use closed-mouth tendon removal while retaining the tendon bone end point, reducing the risk of tendon rupture and damage to normal tissue during tendon removal. It is simple to operate, easy to assemble and use, can reduce work difficulty, save work time, and has a simple structure, which is convenient for postoperative cleaning and disinfection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings of the present invention are provided for illustrative purposes only, and the proportions and quantities of the components in the drawings may not necessarily be consistent with the actual product.

[0023] Figure 1 1 is a schematic structural diagram of a tendon removal device according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Another angle of the tendon removal device shows the structural intent;

[0025] Figure 3 yes Figure 2 A magnified schematic diagram of part A in FIG;

[0026] Figure 4 This is a schematic structural diagram of a first tendon removal portion in an embodiment of the present invention;

[0027] Figure 5 yes Figure 4 Another perspective structural diagram of the first tendon removal part;

[0028] Figure 6 yes Figure 4 Another structural diagram of the first tendon removal part at another angle;

[0029] Figure 7 This is a schematic structural diagram of a second tendon removal portion in an embodiment of the present invention;

[0030] Figure 8 yes Figure 7 Schematic diagram of the structure of the second tendon removal site from another angle;

[0031] Figure 9 yes Figure 8 A magnified schematic diagram of part B in FIG.

[0032] Figure 10is a schematic structural diagram of another first tendon removal portion in an embodiment of the present invention;

[0033] Figure 11 1 is a schematic structural diagram of a tendon removal device according to an embodiment of the present invention;

[0034] Figure 12 yes Figure 11 Schematic diagram of the structure of the first tendon harvesting part of the tendon harvesting device;

[0035] Figure 13 yes Figure 11 Schematic diagram of the structure of the second tendon harvesting part of the middle tendon harvesting device.

[0036] In the picture:

[0037] 1: First tendon removal;

[0038] 11: first extension rod;

[0039] 111: bending;

[0040] 12: first cylinder;

[0041] 121: First opening;

[0042] 13: First handle;

[0043] 131: limiting part;

[0044] 2: The second tendon is harvested;

[0045] 21: second extension rod;

[0046] 22: second cylinder;

[0047] 221: Second opening;

[0048] 23: Second handle;

[0049] 231: Connecting part. DETAILED DESCRIPTION

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0051] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0052] In addition, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0053] See also Figures 1 to 3 As shown, the tendon retrieval device provided in an embodiment of the present invention includes a first tendon retrieval part 1 and a second tendon retrieval part 2.

[0054] See also Figures 4 to 6 As shown, the first tendon removal part 1 includes a first extension rod 11, a first barrel 12, and a first handle 13. The first barrel 12 and the first handle 13 are respectively arranged at the two ends of the first extension rod 11. The two ends of the first barrel 12 are open. A first opening 121 is provided on one side wall of the first barrel 12. The first opening 121 penetrates the wall along the thickness direction of the wall to communicate with the inner cavity of the first barrel 12, and penetrates the wall along the length direction of the first barrel 12.

[0055] See also Figures 7 to 9 As shown, the second tendon removal part 2 includes a second extension rod 21, a second cylinder 22 and a second handle 23. The second cylinder 22 and the second handle 23 are respectively arranged at the two ends of the second extension rod 21. The two ends of the second cylinder 22 are open openings. A second opening 221 is provided on one side wall of the second cylinder 22. The second opening 221 penetrates the wall along the thickness direction of the wall and is connected with the inner cavity of the second cylinder 22, and penetrates the wall in the length direction of the second cylinder 22.

[0056] See also Figures 1 to 3 As shown, the outer contour size of the second cylinder 22 is smaller than the inner cavity size of the first cylinder 12, so that the second cylinder 22 can be inserted into the first cylinder 12, and the first opening 121 and the second opening 221 can be staggered to form an annular cylinder structure with closed side walls.

[0057] When removing the tendon, first use the first tendon removal part 1 to insert the tendon from the first opening 121 into the first cylinder 12, then use the second tendon removal part 2 to buckle the tendon so that the tendon enters the second cylinder 22 from the second opening 221, and then slide the second cylinder 22 into the first cylinder 12. The first opening 121 and the second opening 221 are misaligned to form an annular cylinder structure with closed side walls. At this time, the tendon is located in the second cylinder 22, and then the first tendon removal part 1 and the second tendon removal part 2 are synchronously moved to achieve closed tendon removal. The tendon removal device can convert the open tendon removal method to closed tendon removal while retaining the tendon bone end point, reducing the risk of tendon rupture and damage to normal tissue during tendon removal. It is simple to operate, easy to assemble and use, can reduce work difficulty, save work time, and better protect the safety of patients. It also has a simple structure and is convenient for postoperative cleaning and disinfection.

[0058] It should be noted that the shapes of the first barrel 12 and the second barrel 22 only need to be compatible with each other.

[0059] Preferably, the cross-sections of the first barrel 12 and the second barrel 22 are both circular, which can reduce the risk of scratching and improve safety in use. For example, in one embodiment, the first barrel 12 and the second barrel 22 are both cylinders, and the cavities of the two are also cylindrical cavities. In another embodiment, the first barrel 12 and the second barrel 22 are both truncated cone-shaped barrels (one end is large and the other end is small), the cavity of the first barrel 12 is also truncated cone-shaped (trumpet-shaped), and the cavity of the second barrel 22 can be truncated cone-shaped (trumpet-shaped) or a cylindrical cavity. The second barrel 22 enters from the large end of the first barrel 12 from the small end, and slides into the first barrel 12 under the guidance of the truncated cone-shaped cavity.

[0060] Preferably, the first barrel 12 and the first extension rod 11 are an integral structure. The second barrel 22 and the second extension rod 21 are an integral structure. Preferably, the first handle 13 and the second handle 23 are provided with anti-slip grooves or anti-slip patterns.

[0061] In order to prevent the tissue around the tendon from being stuck between the two cylinders, it is further preferred that the distance between the outer side of the second cylinder 22 and the inner wall of the first cylinder 12 is no greater than 1 mm, for example, 0.5 mm, 0.8 mm, 0.9 mm, 1 mm, etc.

[0062] In order to better maintain the relative position of the second tendon removal part 2 and the first tendon removal part 1 after sliding into place and in the subsequent tendon removal process, and reduce the difficulty of tendon removal, see Figures 4 to 8As shown, in some embodiments, a limiting portion 131 is provided on the first handle 13, and a connecting portion 231 is provided on the second handle 23. When the second cylinder 22 is inserted into the first cylinder 12 and the first opening 121 and the second opening 221 are staggered to the set position, the connecting portion 231 and the limiting portion 131 can match to limit the relative rotation between the first tendon removal portion 1 and the second tendon removal portion 2. In some preferred embodiments, the connecting portion 231 is a block protruding from the second handle 23, and the limiting portion 131 is a slot matching the block. After the block is inserted into the slot, the first tendon removal portion 1 and the second tendon removal portion 2 are rotationally limited. Of course, in some other embodiments, the connecting portion 231 can also be a connecting column, a buckle, etc., and the limiting portion 131 can correspond to a connecting column hole and a buckle seat, etc.

[0063] In other embodiments, after the second barrel is inserted into the first barrel, the first handle 13 and the second handle 23 can be connected by a fixing member to restrict relative rotation between the first tendon removal portion 1 and the second tendon removal portion 2. The fixing member can be a structure such as a cable tie or a ring-shaped fixing member that can fix the positions of the two handles.

[0064] In some other embodiments, see Figure 11-13 As shown, a flat surface is provided on the opposite side of the first handle 13 and the second handle 23, with a limiting portion 131 and a connecting portion 231 respectively provided on the flat surfaces of the two handles. The limiting portion 131 is a slot extending upward from the lower end surface of the first handle 13, and the connecting portion 231 is a clamping block. When the first tendon extraction portion 1 and the second tendon extraction portion 2 need to be fitted together, the second handle 23 is located on the lower side of the first handle 13, and the upper end of the clamping block enters the lower end of the slot and moves along the slot with the second tendon extraction portion 2, causing the second cylinder 22 to fit into place.

[0065] In order to better prevent the tendon from slipping out during the tendon retrieval process, in some embodiments, during the tendon retrieval process, the first opening and the second opening are offset at an angle greater than 90° and less than 270°. More preferably, during the tendon retrieval process, the first opening and the second opening are offset at an angle of 180°. In an embodiment having a limiting portion and a connecting portion, when the connecting portion matches the limiting portion to limit relative rotation between the first tendon retrieval portion and the second tendon retrieval portion, the first opening and the second opening are offset at an angle greater than 90° and less than 270°. More preferably, the first opening and the second opening are offset at an angle of 180°.

[0066] In order to avoid interference between the first tendon removal part 1 and the second tendon removal part 2 during the operation, improve the operation efficiency and reduce the operation difficulty, in some embodiments, at least one of the first extension rod 11 and the second extension rod 21 is provided with a bend, so that the first tendon removal part 1 and the second tendon removal part 2 have a larger operation space. Figure 1 and Figure 5As shown, in a specific embodiment, a bend 111 is provided on the upper portion of the first extension rod 11, and the bending direction is toward the direction of the other extension rod (the second extension rod) when the second cylinder 22 is inserted into the first cylinder 12 ( Figure 1 The direction shown in FIG is bent to the right), so that the distance between the axis of the first sleeve 11 and the axis of the first handle 13 is larger.

[0067] Of course, in some other embodiments, see Figure 10 As shown, the bend 111 can be set at the lower part of the first extension rod 11, that is, the bending direction is toward the side away from the first opening 121, so that the first handle 13 is at a certain angle, and the specific angle is not limited.

[0068] For any of the above extension and bending methods, in some other embodiments, the second extension rod 21 may be provided with a bend, or both the first extension rod 11 and the second extension rod 21 may be provided with a bend, and when the second sleeve 22 is inserted into the first sleeve 12, the bending directions of the first extension rod 11 and the second extension rod 21 are opposite.

[0069] In order to facilitate the determination of the distance of insertion during operation, in some embodiments, at least one of the first extension rod 11 and the second extension rod 21 is provided with a scale line. Figure 1 、 Figure 2 、 Figure 7 and Figure 8 As shown, scale lines are provided on the second extension rod 21. Of course, in other embodiments, scale lines can also be provided on both the first extension rod 11 and the second extension rod 21.

[0070] In order to improve operational safety, in some preferred embodiments, the corners of the first tendon removal portion 1 and the second tendon removal portion 2 are rounded transitionally processed.

[0071] In summary, the present invention, through the cooperation of the first tendon removal part and the second tendon removal part, can adopt closed tendon removal while retaining the tendon bone end point, reducing the risk of tendon rupture and damage to normal tissue during tendon removal. It is simple to operate, easy to assemble and use, can reduce work difficulty, save working time, and has a simple structure, which is convenient for postoperative cleaning and disinfection.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that not every embodiment contains only one independent technical solution. In the absence of a conflict of solutions, the various technical features mentioned in each embodiment can be combined in any manner to form other implementation methods that can be understood by those skilled in the art.

[0073] In addition, without departing from the scope of the present invention, the technical solutions described in the aforementioned embodiments may be modified, or some of the technical features thereof may be replaced by equivalents, without causing the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tendon removal device, characterized in that: include: The first tendon removal portion includes a first extension rod, a first barrel and a first handle, wherein the first barrel and the first handle are respectively provided at two ends of the first extension rod, the two ends of the first barrel are open, a first opening is provided on one side wall of the first barrel, the first opening penetrates the wall along the thickness direction of the wall and communicates with the inner cavity of the first barrel, and penetrates the wall along the length direction of the first barrel; as well as The second tendon removal portion includes a second extension rod, a second barrel and a second handle, wherein the second barrel and the second handle are respectively provided at two ends of the second extension rod, the two ends of the second barrel are open, a second opening is provided on one side wall of the second barrel, the second opening penetrates the wall along the thickness direction of the wall and communicates with the inner cavity of the second barrel, and penetrates the wall along the length direction of the second barrel; The outer contour size of the second cylinder is smaller than the inner cavity size of the first cylinder, so that the second cylinder can be inserted into the first cylinder, and the first opening and the second opening can be staggered. When removing the tendon, the first tendon removal part is first used to insert the tendon into the first cylinder from the first opening, and then the second tendon removal part is used to buckle the tendon so that the tendon enters the second cylinder from the second opening, and then the second cylinder is slid into the first cylinder. The first opening and the second opening are staggered to form an annular cylinder structure with closed side walls. The tendon is located in the second cylinder, and then the first tendon removal part and the second tendon removal part are synchronously moved to achieve closed-end tendon removal; Wherein, the first tendon retrieval part and the second tendon retrieval part are independent components that can be detached and separated.

2. The tendon removal device according to claim 1, characterized in that: The cross sections of the first cylinder and the second cylinder are both circular.

3. The tendon removal device according to claim 2, characterized in that: The second cylinder is in the shape of a truncated cone, and the inner cavity of the first cylinder is in the shape of a truncated cone; and / or The distance between the outer side surface of the second cylinder and the inner cavity wall of the first cylinder is no more than 1 mm.

4. The tendon removal device according to claim 1, characterized in that: One of the first handle and the second handle is provided with a connecting portion, and the other is provided with a limiting portion. When the second cylinder is inserted into the first cylinder and the connecting portion and the limiting portion can match to limit relative rotation between the first tendon retrieval portion and the second tendon retrieval portion, the first opening and the second opening are staggered.

5. The tendon removal device according to claim 4, characterized in that: When the connecting portion matches the limiting portion to limit relative rotation between the first tendon removal portion and the second tendon removal portion, the staggered angle between the first opening and the second opening is greater than 90° and less than 270°.

6. The tendon removal device according to claim 5, characterized in that: When the connecting portion matches the limiting portion to limit relative rotation between the first tendon removal portion and the second tendon removal portion, the offset angle between the first opening and the second opening is 180°.

7. The tendon removal device according to claim 4, characterized in that: The connecting portion is a clamping block, and the limiting portion is a clamping slot matching the clamping block.

8. The tendon removal device according to claim 1, characterized in that: When the second cylinder is inserted into the first cylinder, the first handle and the second handle can be connected by a fixing member to limit relative rotation between the first tendon removal part and the second tendon removal part.

9. The tendon removal device according to claim 1, characterized in that: At least one of the first extension rod and the second extension rod is provided with a bend; and / or At least one of the first extension rod and the second extension rod is provided with a scale line.

10. The tendon removal device according to claim 1, characterized in that: The corners of the first tendon removal portion and the second tendon removal portion are rounded.

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