Split anastomosis locking assembly

Abstract

The present invention provides a split anastomotic locking assembly, comprising a pair of anastomotic rings and a locking device, each anastomotic ring is composed of a pair of semi-ring bodies spliced ​​together, the locking device is composed of a pair of locking pieces detachably connected to each other through a locking buckle, each locking piece is provided with a partial ring body and a locking buckle, the locking buckle is respectively located above and below the partial ring body, the locking buckles of the pair of locking pieces are provided as mutually matching male buckles and female buckles, the male buckle is provided with a finger extending toward the other locking piece, at least one side of the finger is provided with a first ratchet portion, the female buckle is provided with a groove extending toward the other locking piece, a second ratchet portion is provided on the side corresponding to the first ratchet portion of the finger in the groove, the finger has a shape adapted to the groove, so that the finger can extend into the groove in a direction toward the opposite locking piece, and mutually lock through the first ratchet portion and the second ratchet portion. According to the present invention, it is ensured that the radial locking strength of the partial ring body to the anastomotic ring is sufficiently large, the locking force distribution is sufficiently uniform, and it can be applicable to the locking scene of the split anastomotic ring.

Description

Technical Field

[0001] The invention relates to the field of vascular surgery, and in particular to a split anastomosis and locking assembly. Background Art

[0002] Anastomotic rings are often used in vascular suture. The two ends of the blood vessels are respectively hooked to an anastomotic ring, and then a pair of anastomotic rings are connected and locked to each other, so that the blood vessels can be sutured and the suture of the blood vessels can be facilitated. In order to prevent the pressure blood flow in the blood vessels from leaking from the anastomosis, the prior art has designed various locks to lock a pair of anastomotic rings. For example, the vascular anastomotic assembly disclosed in patent CN202410852421.0 uses plastic deformation of a "C"-shaped ring to achieve anastomotic ring locking. It is found through actual use that the "C"-shaped ring of this locking method is easy to loosen under the action of a large blood flow pressure, and cannot fully meet the actual use needs. For another example, the anastomotic ring for the aorta disclosed in patent CN201710012261.9 uses a first buckle and a second buckle to be inserted and self-locked by teeth. However, this technology can only provide a unilateral locking force. Especially for the split anastomotic ring used in the prior art, the unilateral locking force will cause uneven distribution of radial locking force, affecting the locking effect. Summary of the invention

[0003] The invention provides a split type anastomotic locking assembly.

[0004] Specifically, the present invention is achieved through the following technical solutions:

[0005] The embodiment of the present invention provides a split type anastomosis and locking assembly, comprising:

[0006] A pair of anastomotic rings, each of which is composed of a pair of half rings spliced ​​together, and anastomotic surfaces are formed on the opposite sides of the pair of anastomotic rings;

[0007] The locker is composed of a pair of locking members detachably connected to each other through a locking buckle, each locking member is provided with a partial ring body and a locking buckle, the locking buckle is respectively located above and below the partial ring body, and a matching surface in a partial ring shape is formed on the inner side of the partial ring body, so that when the pair of locking members are connected to each other, the matching surface is configured to adapt to the outer peripheral annular contour of a pair of anastomotic rings in an anastomotic state, thereby providing radial locking for the pair of anastomotic rings in an anastomotic state;

[0008] Among them, the lock buckles of a pair of locking elements are arranged as a male buckle and a female buckle that cooperate with each other, the male buckle is provided with a finger extending toward the other locking element, at least one side of the finger is provided with a first ratchet portion, the female buckle is provided with a groove extending toward the other locking element, and a second ratchet portion is provided on the side of the groove corresponding to the first ratchet portion of the finger, the finger has a shape adapted to the groove, so that the finger can extend into the groove in a direction toward the opposite locking element, and be mutually locked through the first ratchet portion and the second ratchet portion.

[0009] In some embodiments, a portion of the ring body is provided with walls on both sides of the mating surface, the extension shape of the walls is consistent with the mating surface, and the walls protrude radially inward from the mating surface, thereby providing axial locking for a pair of mating rings in anastomotic state.

[0010] In some embodiments, the wall is formed with a notch in the interlocking finger and groove region so that the mating surface is exposed axially from the notch.

[0011] In some embodiments, the gap is formed by a wall that is tapered in the groove region toward the opposite locking element.

[0012] In some embodiments, the radial dimension of the mutually locked male and female buckles is not less than the radius dimension of the annular contour formed by the mating surfaces.

[0013] In some embodiments, a positioning hole is formed on a portion of the ring body and radially penetrates the portion of the ring body. A radially protruding positioning block is provided on the outer periphery of any half of the ring body of a pair of anastomotic rings, so that the positioning block can extend into the positioning hole, thereby providing circumferential locking for a pair of anastomotic rings in an anastomotic state.

[0014] In some embodiments, the positioning blocks are arranged on the periphery of the joint of a pair of semi-ring bodies, and the positioning blocks of the pair of semi-ring bodies can be inserted into the positioning holes together, thereby preventing the pair of semi-ring bodies in the joint state from separating from each other.

[0015] In some embodiments, the fingers and grooves extend in concentric arcs with the annular contour formed by the mating surface.

[0016] In some embodiments, the closure is made of an elastic material.

[0017] In some embodiments, the arc covered by the mutually locked area between the first ratchet portion and the second ratchet portion is 8-12°.

[0018] According to an embodiment of the present invention, two locking buckles above and below the partial ring body provide locking force to the partial ring body at the same time, thereby ensuring that the radial locking strength of the partial ring body to the anastomotic ring is large enough and the locking force distribution is uniform enough, which can be applicable to the locking scenario of the split anastomotic ring.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] Figure 1is a schematic diagram of an explosion state of a split type anastomotic locking assembly in one embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of a lock in one embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of an anastomotic ring in one embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of a locking state of a split type anastomotic locking assembly in one embodiment of the present invention;

[0025] Figure 5 is a front view of a split type anastomotic locking assembly in a locked state in one embodiment of the present invention;

[0026] Figure 6 is a cross-sectional view of a split type anastomotic locking assembly in a locked state in one embodiment of the present invention;

[0027] Figure 7 It is a schematic diagram of an initial state of an anastomotic ring placed in a locking element in one embodiment of the present invention.

[0028] Reference numerals:

[0029] 10: anastomotic ring; 11: half ring body; 111: positioning block;

[0030] 20: locking element; 21: part of the ring body; 211: matching surface; 212: wall; 213: slope; 214: positioning hole; 22: finger; 221: first ratchet portion; 23: groove; 231: second ratchet portion. DETAILED DESCRIPTION

[0031] The present invention will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present invention, rather than implying any limitation on the scope of the present invention.

[0032] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to"; the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment"; the term "another embodiment" is to be interpreted as "at least one other embodiment"; the terms "first", "second", etc. may refer to different or the same objects; the term "setting" is not limited to direct or indirect connection, nor is it limited to a specific connection method. Other explicit and implicit definitions may also be included below.

[0033] In the following description, some specific numerical values ​​or numerical ranges may be involved. It should be understood that these numerical values ​​and numerical ranges are merely exemplary, and they may be helpful in putting the idea of ​​the present invention into practice. However, the description of these examples is not intended to limit the scope of the present invention in any way. According to specific application scenarios and requirements, these numerical values ​​or numerical ranges can be set separately.

[0034] As described above, the locking assembly of the prior art cannot meet the locking requirements of the split anastomotic ring 10. The split anastomotic locking assembly proposed in the embodiment of the present invention at least partially solves the above problem. Figure 1-Figure 6 The structure and working principle of the split anastomosis and locking assembly in the embodiment of the present invention are described. Figure 1 As shown, the split anastomotic locking assembly of the embodiment of the present invention generally includes a locker composed of a pair of locking members 20 and a pair of anastomotic rings 10. Each anastomotic ring 10 is used to be fixed to the end of a blood vessel. After the pair of anastomotic rings 10 are anastomosed with each other, they are wrapped and locked by a pair of locking members 20 to prevent the blood vessels from loosening from each other at the anastomotic site.

[0035] In order to facilitate the secondary operation to remove the anastomotic ring 10 after the blood vessel heals, especially when facing the anastomosis of large-diameter blood vessels in organ transplantation surgery, technicians have designed a split anastomotic ring 10, each of which is configured to be composed of two semi-ring bodies 11, which is exactly half of a complete ring body, and a pair of semi-ring bodies 11 are spliced ​​together to form a complete anastomotic ring 10. However, the pair of semi-ring bodies 11 are prone to loosening at the joints, further exacerbating the phenomenon of blood seepage from the anastomosis.

[0036] To solve this problem, the lock of the embodiment of the present invention is configured to be composed of two lock members 20, each lock member 20 includes a partial ring body 21 and a lock buckle, and each lock member 20 is provided with two lock buckles, which are respectively arranged above and below the partial ring body 21. Those skilled in the art will understand that the definitions of "upper" and "lower" are only for the convenience of description. Figure 5 and Figure 6 In actual use, the orientation descriptions of "up" and "down" will change according to the direction state of the lock.

[0037] In one embodiment, the structures of the pair of partial ring bodies 21 can be completely the same, that is, when each partial ring body 21 shares a half of the ring structure, they form a complete ring. In another embodiment, the structures of the pair of partial ring bodies 21 can also be different. In this case, one partial ring body 21 has a small ring shape and the other partial ring body 21 has a large ring shape, so that they can also form a complete ring.

[0038] In order to achieve the mutual locking of a pair of locking elements 20, thereby keeping the partial ring body 21 in a complete ring shape, the lock buckle of each locking element 20 in the embodiment of the present invention is configured as a male buckle / female buckle combination, the male buckle is formed as a finger 22 extending toward another locker that cooperates with it, and the female buckle is formed as a groove 23 extending toward another locker that cooperates with it, and the extension profiles of the finger 22 and the groove 23 are adapted to each other, thereby ensuring that the finger 22 and the groove 23 can achieve radial locking by relying on the mutual fit of the profiles.

[0039] In one embodiment, the finger 22 and the slot 23 also need to be locked by a ratchet structure. Specifically, a first ratchet portion 221 is provided on one side of the finger 22, and a second ratchet portion 231 is provided on the side of the slot 23 corresponding to the first ratchet portion 221. Since the locking of the first ratchet portion 221 and the second ratchet portion 231 is directional, the cooperation between the first ratchet portion 221 and the second ratchet portion 231 allows the finger 22 to be inserted into the slot 23, but can prevent the finger 22 from being disengaged from the slot 23, thereby achieving mutual locking of a pair of locking members 20. In another embodiment, the first ratchet portion 221 can be provided on both sides of the finger 22 at the same time, and correspondingly, the second ratchet portion 231 is also provided on both sides of the slot 23 at the same time. Such a configuration further improves the anti-disengagement locking strength between the finger 22 and the tooth.

[0040] In one embodiment, since the male buckle and the female buckle cooperate with each other, the two buckles of the same locking component 20 can be a male buckle and a female buckle respectively, or they can be both male buckles or female buckles, as long as the other locking component 20 that cooperates with them is set to a corresponding male buckle or female buckle.

[0041] In one embodiment, in order to ensure that the male buckle and the female buckle have sufficient anti-detachment strength, the structural dimensions of the finger 22 and the groove 23 need to be designed accordingly. Figure 6 As shown, the radial dimension of the male buckle and the female buckle is b, and the radius dimension of the annular profile formed by the mating surface 211 is r. Since the strength of the force generated by the first ratchet portion 221 and the second ratchet portion 231 depends on the structural strength of the finger 22 and the groove 23, the dimension b is at least equal to or greater than the dimension r.

[0042] In one embodiment, in order to ensure that the male buckle and the female buckle have sufficient release and separation strength, it is also necessary to design the arc size of the area covered by the mutual locking area between the first ratchet portion 221 and the second ratchet portion 231. Figure 6 As shown, in the locking area of ​​the ratchet structure on both sides of the finger 22, the arc covered by the radially outer ratchet interlocking area is a1, and the arc covered by the radially inner ratchet interlocking area is a2. At least one of a1 and a2 is required to reach 8 to 12°. For example, 8° is the minimum requirement.

[0043] In one embodiment, the shape of the finger 22 and the groove 23 can be a horizontally extending straight line. In this case, when the finger 22 and the groove 23 are arranged along Figure 6 In another embodiment, the shape of the finger 22 and the groove 23 can also be a concentric arc extension with the annular contour formed by the mating surface 211. In this case, when the finger 22 and the groove 23 are moved along the horizontal direction, only the ratchet structure provides a locking force to prevent the separation. Figure 6 When the two components are separated from each other in the horizontal direction, in addition to the ratchet structure, the shape fit between the finger 22 and the groove 23 also provides a locking force to prevent the two components from being separated from each other.

[0044] According to the split type anastomotic locking assembly of the embodiment of the present invention, the undivided ring body of each locking element 20 is formed with a mating surface 211, and when a pair of locking elements 20 are in a mutually connected state, they jointly form a complete annular mating surface 211, and the mating surface 211 just fits and surrounds the outer circumference of the anastomotic ring 10, thereby providing radial locking for the pair of anastomotic rings 10. The radial locking here, on the one hand, prevents the pair of semi-ring bodies 11 of each anastomotic ring 10 from being separated from each other, and on the other hand, prevents the pair of anastomotic rings 10 from being dislocated and separated from each other.

[0045] In one embodiment, a portion of the ring body 21 is provided with walls 212 on both sides of the mating surface 211. The extension shape of the wall 212 is consistent with the mating surface 211, and the wall 212 protrudes radially inward from the mating surface 211, so that when a pair of locking members 20 are in a locked state, the wall 212 can provide axial locking for a pair of anastomotic rings 10 in an anastomotic state, that is, the anastomotic rings 10 are blocked by the wall 212 to prevent them from falling out. The ratchet structure of the finger 22 and the groove 23 allows the finger 22 and the groove 23 to separate from each other along the axial direction of the anastomotic ring 10. In the locked state, in the locking assembly of the prior art, the anastomotic ring 10 is prone to fall out axially. However, the split anastomotic locking assembly of the embodiment of the present invention can not only avoid the problem of axial fallout of the anastomotic ring 10, but also only needs to be moved along the wall 212 when unlocking a pair of lockers. Figure 6 After separating the finger 22 and the groove 23 perpendicular to the paper surface, the pair of locks can be separated from each other, and the unlocking process is convenient.

[0046] In one embodiment, the wall 212 is a slope 213 that gradually narrows toward the other locking element 20 in the groove 23 area. A notch is formed on the wall 212 through the slope 213, and the anastomotic ring 10 can be gradually sent from the notch into the mating surface 211 between the two side walls 212, making the process of sending the anastomotic ring 10 into the locker convenient. Figure 7As shown, when the anastomotic ring is ready to be placed between the two walls 212 of the locking member 20, due to the formation of the slope 213, even if the anastomotic ring and the locking member 20 are not aligned along the axis, the anastomotic ring will not be stuck on the edge of the wall 212. At this time, the position of the anastomotic ring is appropriately adjusted along the axial direction, and the anastomotic ring can be conveniently placed on the matching surface 211 between the two walls 212. In another embodiment, the notch can also be formed at other positions of the wall 212.

[0047] In one embodiment, a positioning hole 214 is formed on the partial ring body 21 and penetrates the partial ring body 21 in the radial direction. The positioning hole 214 is used to cooperate with the positioning block 111 on the outer periphery of the anastomotic ring 10, so as to provide circumferential locking for the anastomotic ring 10. Exemplarily, the positioning hole 214 can be provided on only one partial ring body 21, or the positioning hole 214 can be provided on both partial ring bodies 21. In another example, the number of the positioning holes 214 can be one or more.

[0048] In one embodiment, the positioning block 111 can be set at any position on the periphery of the anastomotic ring 10. For example, the positioning block 111 can be set on the periphery of the joint of a pair of ring bodies, so that the positioning blocks 111 of a pair of semi-ring bodies 11 are in contact with each other, and the size of the positioning hole 214 is set to match the total size of the positioning blocks 111 of a pair of semi-ring bodies 11. When the positioning blocks 111 of a pair of semi-ring bodies 11 are inserted into the positioning hole 214 together, it can not only provide circumferential locking for the anastomotic ring 10, but also further prevent the pair of semi-ring bodies 11 from separating from each other.

[0049] In one embodiment, the closure device may be made of an elastic material, and when the fingers 22 and the slots 23 are separated, the elastic material can ensure that the fingers 22 and the slots 23 return to their original shapes without affecting subsequent use. Exemplarily, the elastic material may be polyethylene, so that the closure device has better biocompatibility.

[0050] The description of the embodiments herein and any reference to directions and orientations are only for the convenience of description and are not to be construed as any limitation on the scope of protection of the present invention. The description of the preferred embodiments may involve combinations of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A split type anastomotic locking assembly, characterized in that: include: A pair of anastomotic rings (10), each of the anastomotic rings being composed of a pair of half ring bodies (11) spliced ​​together, and anastomotic surfaces being formed on mutually opposite sides of the pair of anastomotic rings (10); A locker, comprising a pair of locking members (20) detachably connected to each other via a locking buckle, each locking member (20) being provided with a partial ring body (21) and a locking buckle, the locking buckles being respectively located at two ends of the partial ring body (21), the inner side of the partial ring body (21) being formed with a matching surface (211) in a partially annular shape, so that when the pair of locking members (20) are connected to each other, the matching surface (211) is configured to fit with the outer peripheral annular contour of a pair of anastomotic rings (10) in an anastomotic state, thereby providing radial locking for the pair of anastomotic rings (10) in an anastomotic state; The lock buckles of a pair of locking elements (20) are configured as a male buckle and a female buckle that match each other, the male buckle is provided with a finger (22) extending toward the other locking element (20), at least one side of the finger (22) is provided with a first ratchet portion (221), the female buckle is provided with a groove (23) extending toward the other locking element (20), a second ratchet portion (231) is provided in the groove (23) on a side corresponding to the first ratchet portion (221) of the finger (22), the finger (22) has a shape that matches the groove (23), so that the finger (22) can extend into the groove (23) in a direction toward the other locking element (20), and mutually lock through the first ratchet portion (221) and the second ratchet portion (231), and the radial dimension of the mutually locked male buckle and female buckle is not less than the radius dimension of the annular contour formed by the matching surface (211); Part of the ring body (21) is provided with walls (212) on both sides of the mating surface (211); the extension shape of the wall (212) is consistent with the mating surface (211), and protrudes radially inward from the mating surface (211), thereby providing axial locking for a pair of anastomotic rings (10) in an anastomotic state; A positioning hole (214) is formed on the partial ring body (21) and radially penetrates the partial ring body (21); a positioning block (111) is provided on the outer periphery of the joint of the pair of semi-ring bodies (11); the positioning blocks (111) of the pair of semi-ring bodies (11) can be inserted into the positioning hole (214) together, thereby providing circumferential locking for the pair of anastomotic rings (10) in an anastomotic state and preventing the pair of semi-ring bodies (11) in an anastomotic state from being separated from each other; The locker is made of elastic material, so that a pair of lockers can be separated from each other by only separating the fingers (22) and the grooves (23) in the axial direction, and it can be ensured that the separated fingers (22) and grooves (23) return to their original shapes.

2. The split type anastomosis and locking assembly according to claim 1, characterized in that: The wall (212) is formed with a notch in the area of ​​the interlocking fingers (22) and grooves (23), so that the mating surface is exposed axially from the notch.

3. The split type anastomosis and locking assembly according to claim 2, characterized in that: The notch is formed by the wall (212) having a slope (213) that gradually narrows in the groove region toward the opposite locking element (20).

4. The split type anastomosis and locking assembly according to claim 1, characterized in that: The finger (22) and the groove (23) extend in a concentric arc shape with the annular contour formed by the mating surface (211).

5. The split type anastomosis and locking assembly according to claim 1, characterized in that: The arc covered by the mutually locked area between the first ratchet portion (221) and the second ratchet portion (231) is 8 to 12 degrees.

Images