Foldable stapling assembly

Abstract

According to the foldable anastomosis assembly, the anastomosis sections are divided into two groups, all the anastomosis sections in each group are sequentially connected end to end through the pivoting mechanism, and the two groups of anastomosis sections are connected end to end through the pivoting mechanism; the opposite faces of the pair of anastomosis rings are provided with positioning rods and positioning holes which correspond in position respectively, and the positioning rods can be inserted into the positioning holes and locked in the positioning holes through ratchet structures. According to the folding anastomosis ring, the whole folding operation process is convenient, the size of the anastomosis ring in the contraction state can be further reduced compared with that of a foldable anastomosis ring in the prior art, the flatness and roundness of the anastomosis ring can be calibrated, and it is guaranteed that needle holes of the anastomosis ring can be smoothly inserted to complete anastomosis operation.

Description

Technical Field

[0001] The invention relates to the field of vascular surgical medical instruments, and in particular to a foldable anastomosis component. Background Art

[0002] Vascular anastomosis components are usually used in open surgery, because the operating space of open surgery is large, the operator can clearly observe the local structure of the anastomosis component, and it is also convenient to operate the anastomosis process. However, for minimally invasive surgery, especially in endoscopic surgery, the anastomosis component is large in size and difficult to put into a small space and operate in a small space.

[0003] To solve this problem, the prior art proposes a foldable anastomosis assembly. U.S. Patent No. 11413044B2 divides the anastomosis ring into multiple sections, and adjacent sections can be pivoted and folded in a direction consistent with the axial direction of the anastomosis ring; U.S. Patent No. 10045769B2 also divides the anastomosis ring into multiple sections, and adjacent sections can be pivoted and folded in a direction consistent with the radial direction of the anastomosis ring. The sections of the anastomosis ring of the above prior art can only pivot in one direction, so that the size of the folded and contracted anastomosis ring is still large, which cannot fully meet the needs of minimally invasive surgery applications. Summary of the invention

[0004] The present invention provides a foldable anastomosis assembly.

[0005] Specifically, the present invention is achieved through the following technical solutions: An embodiment of the present invention provides a foldable anastomosis assembly, comprising a pair of bidirectionally foldable anastomosis rings, each of which is provided with an even number of anastomosis segments greater than 4, the anastomosis segments being divided into two groups, the anastomosis segments in each group being connected in sequence at their ends by a pivot mechanism, so that the anastomosis segments in each group can be folded along a first direction consistent with the axial direction of the anastomosis ring between an axial contraction state and an axial expansion state, and each group of anastomosis segments is semi-annular in the axial expansion state; the two groups of anastomosis segments are connected at their ends by a pivot mechanism, so that the two groups of anastomosis segments can be folded along a second direction consistent with the radial direction of the anastomosis ring between a radial contraction state and a radial expansion state, and the two groups of anastomosis segments are complete annular in the radial expansion state; wherein, the opposite surfaces of a pair of anastomosis rings are respectively provided with corresponding positioning rods and positioning holes, the positioning rods can be inserted into the positioning holes, and locked in the positioning holes by a ratchet structure.

[0006] In some embodiments, a positioning and locking structure is provided between the mating surfaces of adjacent anastomotic segments, and the positioning and locking structure is used to provide positioning and locking between the adjacent anastomotic segments.

[0007] In some embodiments, the positioning and locking structure includes a convex column and a concave hole respectively arranged on the matching surfaces of adjacent anastomotic segments, so that the convex column can be embedded in the concave hole in the expanded state.

[0008] In some embodiments, a conical surface is formed on the top of the convex column, and an inverted conical surface matching the conical surface is formed on the top of the concave hole.

[0009] In some embodiments, at least one positioning rod or positioning hole is disposed on each anastomotic segment.

[0010] In some embodiments, the length of the positioning rod is set to be more than 1.5 times the depth of the corresponding positioning hole.

[0011] In some embodiments, the positioning rod is formed with a smooth section and a ratchet section, and the smooth section is located on a side of the ratchet section away from the anastomotic ring.

[0012] In some embodiments, the pivot mechanism is a pivot pin.

[0013] In some embodiments, the pivot pin is disposed on one side of the mating surface of the anastomotic segment, and the protruding column or the recessed hole is disposed on the other side of the mating surface away from the pivot pin.

[0014] According to an embodiment of the present invention, by dividing the multiple anastomotic segments of the anastomotic ring into two groups, the anastomotic segments in each group can be folded along a first direction consistent with the axial direction of the anastomotic ring, and the two groups of anastomotic segments can be folded along a second direction consistent with the radial direction of the anastomotic ring. After the anastomotic ring in a contracted state is placed in a narrow space through a narrow channel, it is only necessary to fold and unfold the two groups of anastomotic segments of the anastomotic ring along the second direction, and then fold and unfold the two groups of anastomotic segments along the first direction at the same time to form a complete anastomotic ring. The entire folding operation process is convenient, and the size of the anastomotic ring in a contracted state can be further reduced by half compared with the foldable anastomotic ring of the prior art. In addition, since the anastomotic segments need to pivot in two directions, the formed anastomotic ring has the problem of inaccurate flatness and roundness. When the two anastomotic rings are anastomosed, by providing a positioning rod and a positioning hole with a ratchet structure, even if the alignment is inaccurate, the elastic deformation ability of the ratchet structure can be used to calibrate the flatness and roundness of the anastomotic ring, so as to ensure that the pinholes of the anastomotic ring can be smoothly inserted to complete the anastomotic operation.

[0015] 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 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. Figure 1 is a schematic diagram from a first perspective of a contracted state of an anastomotic ring in a foldable anastomotic assembly in an embodiment of the present invention; Figure 2 yes Figure 1 A partial enlarged view of the middle A; Figure 3 is a schematic diagram from a second viewing angle of a contracted state of an anastomotic ring in a foldable anastomotic assembly in an embodiment of the present invention; Figure 4 is a partial cross-sectional view of a positioning rod and a positioning hole in one embodiment of the present invention; Figure 5 Schematic diagram of the unfolded state of the foldable anastomosis assembly in one embodiment of the present invention.

[0016] Reference numerals: 1: first anastomotic section; 2: second anastomotic section; 3: first pivot pin; 4: second pivot pin; 51: positioning rod; 511: ratchet section; 512: smooth section; 52: positioning hole; 61: convex column; 62: concave hole. DETAILED DESCRIPTION

[0017] 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.

[0018] 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 connection or indirect connection, nor is it limited to a specific connection method. Other explicit and implicit definitions may also be included below.

[0019] 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.

[0020] As mentioned above, the segments of the anastomotic ring in the prior art can only pivot in one direction, so that the size of the anastomotic ring after folding and shrinking is still large, which cannot fully meet the requirements of minimally invasive surgery applications. The foldable anastomotic assembly proposed in the embodiments of the present invention at least partially solves the above problem. Figures 1 to 5 The structure and working principle of the foldable anastomosis assembly according to an exemplary embodiment of the present invention are described below. Figures 1 to 5As shown, the foldable anastomotic assembly of the embodiment of the present invention generally includes a pair of anastomotic rings, each of which adopts the bidirectional folding technology of the embodiment of the present invention, and can obtain a size that is half that of the foldable anastomotic ring of the prior art in the contracted state. The following is a detailed description taking one of the anastomotic rings as an example, and those skilled in the art can understand that the other anastomotic ring that cooperates with it also adopts the same folding method, and the difference is limited to the position and number of the needle and the hole, the position and number of the positioning rod 51 and the positioning hole 52, and the number of the anastomotic segments.

[0021] To achieve bidirectional folding, the number of anastomotic segments constituting the anastomotic ring must be an even number, and the even number of anastomotic segments is divided into two groups, and the number and size of the anastomotic segments between the two groups should be completely corresponding, so as to ensure that the anastomotic ring can be freely folded between the axially contracted state and the axially expanded state. For example, Figures 1 to 3 As shown, the number of the anastomotic segments is 4. In other examples, the number of the anastomotic segments may also be 6, 8 or more.

[0022] by Figures 1 to 5 The first group of anastomotic segments is composed of two first anastomotic segments 1, and the two first anastomotic segments 1 are connected head to tail by a first pivot pin 3. In the same way, the second group of anastomotic segments is composed of two second anastomotic segments 2, and the two second anastomotic segments 2 are connected head to tail by a second pivot pin 4. Figure 1 and Figure 3 In this state, the first pivot pin 3 and the second pivot pin 4 are coaxially arranged so that the two first anastomotic segments 1 and the two second anastomotic segments 2 can smoothly pivot along the first direction at the same time, wherein the first direction is consistent with the axial direction of the anastomotic ring.

[0023] One end of the first anastomotic segment 1 is connected to another first anastomotic segment 1 via a first pivot pin 3, and the other end of the first anastomotic segment 1 is connected to one end of the second anastomotic segment 2 via a second pivot pin 4, so that the first anastomotic segment 1 and the second anastomotic segment 2 can pivot along the second direction. Figure 1 and Figure 3 In the axially contracted state shown, the two sets of anastomotic segments cannot pivot along the second direction because the axes of the two second pivot pins 4 do not coincide. Figure 5 As shown, only when the anastomotic ring is at least in the axially expanded state, the two sets of anastomotic segments can smoothly pivot along the second direction because the axial directions of the two second pivot pins 4 are completely overlapped. The second direction is consistent with the radial direction of the anastomotic ring in the expanded state. It should be noted that Figure 1 and Figure 3 The state shown is the limit state of radial contraction, but not the limit state of axial contraction. In fact, the two first anastomotic segments 1 and the two second anastomotic segments 2 can still continue to contract in the trend of moving away from the semi-annular shape.

[0024] In one embodiment, in order to ensure that the positions of the anastomotic segments remain locked in an unfolded state, a positioning locking structure needs to be provided on the mating surfaces at the ends of the anastomotic segments. The positioning locking structure may be provided on the mating surfaces of each anastomotic segment, or only on the mating surfaces of some anastomotic segments. The positioning locking structure may be provided on the mating surface of one end of an anastomotic segment, or on the mating surfaces of both ends of an anastomotic segment. For example, Figure 2 As shown, the positioning and locking structure is provided as a matching structure of a convex column 61 and a concave hole 62, wherein a convex column 61 is provided on the matching surface of one anastomotic segment, and a concave hole 62 is correspondingly provided on the matching surface of another anastomotic segment, and when the anastomotic ring is in an expanded state, that is, when the matching surfaces of adjacent anastomotic segments are pressed against each other, the convex column 61 can be embedded in the concave hole 62, so as to at least provide a limiting locking effect parallel to the direction of the matching surfaces between the mutually pressed matching surfaces. The convex column 61 and the concave hole 62 are embedded in an interference fit manner, or the convex column 61 has elastic deformation ability and is in a radially compressed state when embedded in the concave hole 62, so that the convex column 61 embedded in the concave hole 62 can also provide a locking effect that hinders the pivoting between adjacent anastomotic segments, and can provide a locking force that keeps the anastomotic ring in an expanded annular state.

[0025] In one embodiment, Figure 2 As shown, a conical surface is formed on the top of the protruding column 61, and an inverted conical surface matching with the conical surface is formed on the top of the recessed hole 62. When the first pivot pin 3 or the second pivot pin 4 is loosened, the conical surface and the inverted conical surface can guide the matching surfaces of adjacent anastomotic segments to align and fit together.

[0026] In one embodiment, the pivot pin is located on one side of the mating surface of the anastomotic segment, and the convex column 61 and the concave hole 62 are located on the other side of the mating surface, so that the convex column 61 and the concave hole 62 are embedded and matched to achieve a maximum locking force arm relative to the mating surface. Figure 1 As shown, at the mating surface at one end of the first mating section, the second pivot pin 4 is located on one side of the mating surface, and the boss 61 or the recessed hole 62 is located on the other side opposite to the second pivot pin; at the mating surface at the other end of the first mating section, the first pivot pin 3 is located on one side of the mating surface, and the boss 61 or the recessed hole 62 is located on the other side opposite to the first pivot pin.

[0027] The anastomotic segments of the embodiment of the present invention need to pivot along the first direction and the second direction, so that the formed anastomotic ring has the problem of inaccurate flatness, that is, the planes of the anastomotic segments are not strictly in the same plane, and the problem of inaccurate roundness, that is, the anastomotic ring is not strictly in a circular ring shape. To solve this problem, the embodiment of the present invention is provided with a positioning rod 51 on the anastomotic surface of an anastomotic ring, and a positioning hole 52 is provided at a corresponding position of the anastomotic surface of another anastomotic ring. When a pair of anastomotic rings are anastomosed with each other, the positioning rod 51 can be inserted into the positioning hole 52. On the one hand, the positioning rod 51 and the positioning hole 52 are arranged closer to the outer periphery of the anastomotic ring than the needle. When the end of the blood vessel is turned outward to cover the needle, the operator can quickly align the positions of the needle and the hole by observing the positions of the positioning rod 51 and the positioning hole 52. On the other hand, more importantly, the positioning rod 51 and the positioning hole 52 are arranged to be locked by a ratchet structure, so that when the positioning rod 51 and the positioning hole 52 cannot be aligned due to inaccurate flatness and roundness of the anastomotic ring, the positioning rod 51 is forcibly inserted into the positioning hole 52. Since the ratchet structure has elastic deformation ability, after the positioning rod 51 is inserted into the positioning hole 52, it can provide a calibration effect on the anastomotic ring, so that the anastomotic ring can be corrected in terms of flatness and roundness.

[0028] In one embodiment, at least one positioning rod 51 or positioning hole 52 is provided on each anastomotic segment, so as to ensure that the pivot connection points between all adjacent anastomotic segments of the anastomotic ring can be calibrated.

[0029] In one embodiment, Figure 4 As shown, the length of the positioning rod 51 is set to be more than 1.5 times the depth of the corresponding positioning hole 52, so that the locking gear adjustment range achieved by the ratchet structure between the positioning rod 51 and the positioning hole 52 is large enough to meet the conventional anastomosis requirements of blood vessel wall thickness.

[0030] In one embodiment, the positioning rod 51 is formed with a smooth section 512 and a ratchet section 511. The smooth section 512 is located on the side of the ratchet section 511 away from the anastomotic ring. When the positioning rod 51 is initially inserted into the positioning hole 52, there is less friction between the smooth section 512 and the positioning hole 52, which is conducive to the smooth insertion of the positioning rod 51 into the positioning hole 52.

[0031] When using the foldable anastomosis assembly of the embodiment of the present invention, first put the anastomosis ring in a fully contracted state into a narrow surgical space through a narrow passage, adjust the first pivot pin 3 to make the mating surfaces between the first anastomosis segments 1 and the second anastomosis segments 2 close to each other, and then adjust the second pivot pin 4 to make the first anastomosis segment 1 and the second anastomosis segment 2 radially expand to obtain a complete anastomosis ring. After the end of the blood vessel is everted and hung on the needle of the anastomosis ring, the positioning rods 51 and the positioning holes 52 of a pair of anastomosis rings are aligned and inserted, and then the anastomosis surfaces of the pair of anastomosis rings are further compressed to complete the anastomosis operation.

[0032] 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.

[0033] 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 foldable anastomosis assembly, characterized in that: It comprises a pair of bidirectionally foldable anastomotic rings, each of which is provided with an even number of anastomotic segments greater than 4, and the anastomotic segments are divided into two groups, and the anastomotic segments in each group are connected in sequence at their ends by a pivot mechanism, so that the anastomotic segments in each group can be folded along a first direction consistent with the axial direction of the anastomotic ring between an axial contraction state and an axial expansion state, and each group of anastomotic segments is semi-circular in the axial expansion state; the two groups of anastomotic segments are connected at their ends by a pivot mechanism, so that the two groups of anastomotic segments can be folded along a second direction consistent with the radial direction of the anastomotic ring between a radial contraction state and a radial expansion state, and the two groups of anastomotic segments are complete rings in the radial expansion state; wherein, the opposite surfaces of a pair of anastomotic rings are respectively provided with corresponding positioning rods and positioning holes, and the positioning rods can be inserted into the positioning holes and locked in the positioning holes by a ratchet structure.

2. The foldable anastomosis assembly according to claim 1, characterized in that: A positioning and locking structure is arranged between the matching surfaces of adjacent anastomotic segments, and the positioning and locking structure is used to provide positioning and locking between the adjacent anastomotic segments.

3. The foldable anastomosis assembly according to claim 2, characterized in that: The positioning and locking structure comprises a convex column and a concave hole respectively arranged on the matching surfaces of adjacent anastomotic segments, so that the convex column can be embedded in the concave hole in the unfolded state.

4. The foldable anastomosis assembly according to claim 3, characterized in that: A conical surface is formed at the top of the convex column, and an inverted conical surface matching the conical surface is formed at the top of the concave hole.

5. The foldable anastomosis assembly according to claim 1, characterized in that: At least one positioning rod or positioning hole is arranged on each anastomotic segment.

6. The foldable anastomosis assembly according to claim 1, characterized in that: The length of the positioning rod is set to be more than 1.5 times the depth of the corresponding positioning hole.

7. The foldable anastomosis assembly according to claim 1, characterized in that: The positioning rod is formed with a smooth section and a ratchet section, wherein the smooth section is located on a side of the ratchet section away from the anastomotic ring.

8. The foldable anastomosis assembly according to claim 3, characterized in that: The pivot mechanism is a pivot pin.

9. The foldable anastomosis assembly according to claim 8, characterized in that: The pivot pin is arranged on one side of the matching surface of the anastomotic segment, and the protruding column or the concave hole is arranged on the other side of the matching surface away from the pivot pin.

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