Sutureless vascular system

Abstract

This invention relates to a sutureless vascular system, comprising a sutureless blood vessel, an artificial blood vessel, a stent, and a fixation ring. One end of the fixation ring is connected to one end of the artificial blood vessel, and the end of the artificial blood vessel connected to the fixation ring is simultaneously connected to one end of the stent, with the fixation ring positioned around the outside of the stent. In the initial state, the stent is restrained and in a contracted state, with the distal end of the stent able to enter the target blood vessel. The fixation ring can be positioned outside the target blood vessel. In the release state, the stent is released and expands, and after expansion, the target blood vessel is clamped between the stent and the fixation ring. This invention's sutureless vascular system effectively controls the pre-tightening force at the incision site of the target blood vessel, is simple to operate, and significantly shortens the surgical time. Furthermore, the sutureless vascular system has a simple structure, is easier to manufacture, and has lower manufacturing costs.

Description

Technical Field

[0001] This invention relates to the field of interventional medicine, specifically to a sutureless vascular system. Background Technology

[0002] Surgical suturing of blood vessels is now commonplace in medical procedures, used to establish blood circulation channels or for vascular bridging. Compared to conventional surgical suturing, artificial blood vessel anastomosis is difficult, takes too long, and is prone to bleeding and complications. Sutureless rapid docking structures are simple to operate, effectively compensate for shortened vascular sutures, provide secure fixation, prevent bleeding, and reduce suturing time.

[0003] Currently, most sutureless connection structures on the market rely on a compressible elastic metal stent sewn onto one end of an artificial blood vessel (corrugated tube or straight tube), while the other end has a sutureless ring connection module. The sutureless ring is mainly made of a compressible elastic metal stent braid, a pre-bent titanium alloy plate with openings, and a stainless steel sleeve. Generally, after the sutureless ring is inserted into the blood vessel, it is fixed externally using a hemostatic band or elastic restraint device. The sutureless process involves first inserting the sutureless ring inside the target blood vessel, and then using a band to secure the vessel externally to ensure a tight seal.

[0004] The market-standard sutureless surgical procedure requires the use of a tool to tighten the band after implanting the sutureless ring. This involves numerous parts, a complex structure, and complicated operation, and is prone to cross-infection. Furthermore, due to varying operator techniques and different band tightening forces, it can easily cause vascular necrosis or prolong the surgical time. The protrusions at the band connection points can also easily scratch internal organs. Summary of the Invention

[0005] To overcome the problems existing in the prior art, the present invention provides a sutureless vascular system.

[0006] The present invention provides a sutureless vascular system, comprising a sutureless blood vessel, an artificial blood vessel, a stent, and a fixation ring. One end of the fixation ring is connected to one end of the artificial blood vessel, and the end of the artificial blood vessel connected to the fixation ring is simultaneously connected to one end of the stent. The fixation ring is positioned around the outside of the stent. In the initial state, the stent is restrained and in a contracted state, and the distal end of the stent can enter the target blood vessel. The fixation ring can be positioned outside the target blood vessel. In the release state, the stent is released and expands, and after expansion, the target blood vessel is clamped between the stent and the fixation ring.

[0007] In some embodiments of the present invention, the sutureless vascular system includes a pull cord, the pull cord loop being disposed on the stent so that the stent can be in a contracted state when bound by the pull cord, and pulling the pull cord away from the stent can release the stent for expansion.

[0008] In some embodiments of the present invention, the stent includes a first stent and a second stent, the fixing ring includes a first fixing ring and a second fixing ring, the artificial blood vessel is connected between the first stent and the second stent, the first fixing ring is located outside the first stent, and the end side of the first fixing ring near the artificial blood vessel is connected to the end side of the first stent near the second stent, the second fixing ring is located outside the second stent, and the second fixing ring is connected to the end side of the second stent near the first stent, the first pull wire can be looped around the first stent, and the second pull wire can be looped around the second stent.

[0009] In some embodiments of the present invention, the fixing ring includes a first hollow portion, which includes a plurality of supporting hollow areas and a plurality of friction hollow areas. The plurality of supporting hollow areas and the plurality of friction hollow areas are alternately spaced in the circumferential direction. The axial length of the supporting hollow area is less than the axial length of the friction hollow area, and the circumferential length of the supporting hollow area is greater than the circumferential length of the friction hollow area. The friction hollow area includes a first friction area and a second friction area, which are arranged side by side and spaced apart along the axial direction.

[0010] In some embodiments of the present invention, the fixing ring includes a plurality of second hollow portions disposed near the artificial blood vessel, the plurality of second hollow portions being evenly spaced on the fixing ring in the circumferential direction, and the side of the second hollow portion away from the artificial blood vessel being arranged in an arc shape.

[0011] In some embodiments of the present invention, the fixing ring includes a fixing part, an adapting part, and a connecting part, the adapting part being connected between the fixing part and the connecting part, the connecting part being used to connect to the artificial blood vessel, and the adapting part including a braided mesh tube.

[0012] In some embodiments of the present invention, a plurality of interconnected clamping brackets are provided on one side of the stent connected to the artificial blood vessel, and the plurality of clamping brackets are disposed on the outer surface of the stent. The clamping bracket includes a fixed section and a movable section. One end of the movable section is connected to the fixed section, and the other end is a free end. The fixed section is fixedly connected to the outer surface of the stent, and the free end of the movable section can rotate relative to the fixed section. When the stent is restrained and in a contracted state, the movable section is disposed close to the outer surface of the stent. When the stent is in a released state, the free end of the movable section can rotate relative to the fixed section so that the movable section can be close to the outer surface of the fixed ring.

[0013] In some embodiments of the present invention, the movable segment includes a first movable segment and a second movable segment connected axially. The first movable segment is connected to the fixed segment through the second movable segment. When the bracket is in the released state, the fixed segment and the second movable segment have an angle of less than 90 degrees, and the first movable segment and the second movable segment have an angle of greater than 90 degrees and less than 180 degrees.

[0014] In some embodiments of the present invention, the fixed segment is fixedly connected to the movable segment; or a connector is provided between the fixed segment and the movable segment. When the support is constrained and in a contracted state, the two ends of the connector are tightly attached to the outer surface of the support. When the support is in a released state, the connector bends, causing the movable segment to rotate relative to the fixed segment.

[0015] In some embodiments of the present invention, the sutureless vascular system further includes a third pull wire. When the stent is in a contracted state, the third pull wire is looped around the clamping stent. Pulling the third pull wire can cause the third pull wire to move away from the clamping stent, thereby causing the movable segment to rotate relative to the fixed segment.

[0016] In some embodiments of the present invention, the sutureless vascular system further includes a delivery device, the delivery device including a restraint assembly disposed at a distal end and a release assembly connected to the restraint assembly, the stent being restrained by the restraint assembly in a contracted state, the release assembly being able to move proximally to release the restraint assembly, the stent expanding and unfolding causing the restraint assembly to expand and unfold, so that the outer surface of the restraint assembly is tightly attached to the inner wall of the blood vessel.

[0017] Compared with existing technologies, the sutureless vascular system of the present invention has the following advantages: The sutureless vascular system of the present invention can effectively control the pre-tightening force of the target blood vessel incision, that is, the force with which the stent and fixing ring clamp the target blood vessel, avoiding differences in pre-tightening force due to individual operator differences, thereby avoiding various complications and even surgical failure. Simultaneously, the connection between the artificial blood vessel and the target blood vessel is completed simply by placing the stent into the target blood vessel and then releasing the stent, simplifying the operation and greatly shortening the surgical time. Furthermore, the sutureless vascular system has a simple structure, is easier to manufacture, and has lower manufacturing costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the sutureless vascular system provided in the first embodiment of the present invention.

[0019] Figure 2 A three-dimensional structural schematic diagram of a deformable example of a sutureless vascular system provided in the first embodiment of the present invention.

[0020] Figure 3 A three-dimensional structural schematic diagram of the fixation ring of the sutureless vascular system provided in the first embodiment of the present invention.

[0021] Figure 4 A schematic diagram of the fixation ring of the sutureless vascular system provided in the first embodiment of the present invention from another angle.

[0022] Figure 5 A schematic diagram of the three-dimensional structure of the fixation ring in other embodiments of the sutureless vascular system provided in the first embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the stent and clamping stent of the sutureless vascular system provided in the first embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the stent of the sutureless vascular system provided in the first embodiment of the present invention and the structure of the clamped stent in a contracted state.

[0025] Figure 8 This is a structural schematic diagram of the stent and the stent release state of the sutureless vascular system provided in the first embodiment of the present invention.

[0026] Figure 9A This is a schematic diagram of the clamping and rotating process of the sutureless vascular system provided in the first embodiment of the present invention.

[0027] Figure 9B This is an enlarged schematic diagram of the local clamping stent and the fixing ring of the sutureless vascular system provided in the first embodiment of the present invention.

[0028] Figure 10This is an enlarged schematic diagram of the local clamping stent structure in other embodiments of the sutureless vascular system provided in the first embodiment of the present invention.

[0029] Figure 11 This is a schematic diagram of the sutureless vascular system provided in the first embodiment of the present invention, in which the sutureless vascular vessel is loaded in the delivery device.

[0030] Figure 12 This is a three-dimensional structural diagram of the sutureless vascular system provided in the second embodiment of the present invention.

[0031] Figure 13 This is a three-dimensional structural diagram of a sutureless vascular system in other embodiments provided by the second embodiment of the present invention.

[0032] Figure 14 This is a three-dimensional structural diagram of a sutureless vascular system in other embodiments provided by the second embodiment of the present invention.

[0033] Figure 15 This is a three-dimensional structural diagram of a sutureless vascular system in other embodiments provided by the second embodiment of the present invention.

[0034] Figure 16 This is a three-dimensional structural diagram of the locking ring of the sutureless vascular system provided in the second embodiment of the present invention.

[0035] Figure 17 This is a three-dimensional structural schematic diagram of another locking ring of the sutureless vascular system provided in the second embodiment of the present invention.

[0036] Figure 18 This is a three-dimensional structural schematic diagram of the balloon catheter dilation locking ring of the sutureless vascular system provided in the second embodiment of the present invention.

[0037] Figure 19 This is a three-dimensional structural diagram of the sutureless vascular system provided in the third embodiment of the present invention.

[0038] Figure 20 This is a three-dimensional structural schematic diagram of the locking device of the sutureless vascular system provided in the third embodiment of the present invention.

[0039] Figure 21 This is a three-dimensional structural diagram of the locking component of the sutureless vascular system provided in the third embodiment of the present invention.

[0040] Figure 22 This is a perspective view of the adjustable component of the sutureless vascular system provided in the third embodiment of the present invention after rotation.

[0041] Figure 23 This is a three-dimensional structural schematic diagram of another locking component of the sutureless vascular system provided in the third embodiment of the present invention.

[0042] Explanation of reference numerals in the attached diagram: 1. Sutureless vascular system; 11. Sutureless blood vessel; 111. Artificial blood vessel; 112. Stent; 1121. First stent; 1122. Second stent; 113. Fixing ring; 1131. First fixing ring; 1132. Second fixing ring; 1133. First hollow section; 1134. Supporting hollow area; 1135. Friction hollow area; 11351. First friction area; 11352. Second friction area; 1136. 1137. Fixing part; 1138. Adapting part; 1139. Connecting part; 1130. Connecting hole; 114. Second hollow part; 115. Pull wire; 1161. First pull wire; 1172. Second pull wire; 118. Clamping bracket; 1191. Fixing section; 1192. Movable section; 11921. First movable section; 11922. Second movable section; 1193. Connecting section; 12. Conveyor; 121. Restraint assembly; 1211. Wrapping film; 1 212. Tightening thread; 122. Release assembly; 1221. Fixing wire; 2. Sutureless vascular system; 21. Sutureless blood vessel; 211. Artificial blood vessel; 212. Locking ring; 2121. Locking ring body; 2122. Snap-fit ​​part; 2123. Snap-fit ​​groove; 2124. Through hole; 213. Fixing ring; 22. Balloon catheter; 221. Balloon; 222. Catheter; 3. Sutureless vascular system; 31. Sutureless blood vessel; 311. Vascular assembly Components; 3111, artificial blood vessel; 3112, fixing ring; 312, locking device; 3121, locking ring; 31211, snap-fit ​​groove; 3122, locking assembly; 3123, locking body; 31231, sliding groove; 31232, rotating shaft hole; 3124, locking element; 31241, connecting post; 31242, protrusion; 31243, wedge block; 3125, adjusting element; 31251, arc-shaped lever; 3126, rotating shaft. Detailed Implementation

[0043] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0044] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0045] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0046] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0047] To more clearly describe the structure of this application, the terms "proximal" and "distal" are used herein as conventional terms in the field of interventional medicine. Specifically, "distal" refers to the end furthest from the operator during the surgical procedure, "proximal" refers to the end closest to the operator during the surgical procedure, "axial" refers to its length direction, and "radial" refers to the direction perpendicular to the "axial".

[0048] Please see Figure 1 The first embodiment of this invention provides a sutureless vascular system 1, which is used to connect an artificial blood vessel to a target blood vessel, replacing the target blood vessel with an artificial blood vessel. The target blood vessel can be a model blood vessel or a native blood vessel. In this invention, a native blood vessel is used as an example for detailed description. The sutureless vascular system 1 includes a sutureless blood vessel 11, which includes an artificial blood vessel 111, a stent 112, and a fixing ring 113. One end of the fixing ring 113 is connected to one end of the artificial blood vessel 111, and the end of the artificial blood vessel 111 connected to the fixing ring 113 is simultaneously connected to one end of the stent 112, with the fixing ring 113 surrounding the outside of the stent 112. In the initial state, that is, before the sutureless blood vessel 11 is connected to the target blood vessel, the stent 112 is restrained and in a contracted state. At this time, the distal end of the stent 112 can be inserted into the target blood vessel, allowing the entire stent 112 to enter the target blood vessel, with the fixing ring 113 positioned outside the target blood vessel. The stent 112 is then released and expands, opening up the target blood vessel and clamping it between the stent 112 and the fixing ring 113. Through the self-expanding property of the stent 112, the target blood vessel is opened and pressed tightly against the inner wall of the fixing ring 113, thus clamping the target blood vessel and achieving a sutureless connection between the artificial blood vessel 111 and the target blood vessel. The sutureless vascular system 1 of the first embodiment of the present invention can effectively control the pre-tightening force of the incision for ligating the target blood vessel, that is, the force with which the stent 112 and the fixing ring 113 clamp the target blood vessel, avoiding differences in pre-tightening force due to individual operator differences, thereby avoiding various complications and even surgical failure. Furthermore, the connection between the artificial blood vessel 111 and the target blood vessel is completed simply by inserting the stent 112 into the target blood vessel and then releasing it, simplifying the operation and greatly shortening the surgical time. Furthermore, the sutureless vascular system 1 has a simple structure, is easier to manufacture, and has a lower manufacturing cost.

[0049] It should be noted that the stent 112 is a self-expanding covered stent 112, and the fixation ring 113 can be made of metal or polymer materials. A flexible material, such as silicone or a polymer membrane, can be coated on the fixation ring 113 to prevent the fixation ring 113 from being too rigid and causing excessive irritation to the target blood vessel.

[0050] Please continue reading. Figure 1In the first embodiment of the present invention, the stent 112 can be restrained by a pull suture 114. The sutureless blood vessel 11 also includes a pull suture 114. One end of the pull suture 114 is looped around the stent 112 so that the stent 112 is restrained and in a contracted state. The other end of the pull suture 114 is a free end that extends outside the stent 112 for the operator to manually pull. Pulling the free end of the pull suture 114 directly releases the portion of the pull suture 114 that is looped around the stent 112 until the pull suture 114 moves away from the stent 112. At this point, the stent 112 is no longer restrained by the pull suture 114 and is thus released, allowing the stent 112 to expand and unfold. The method of looping the pull suture 114 around the stent 112 is prior art and will not be described in detail here.

[0051] Please see Figure 1 and Figure 2The sutureless blood vessel 11 can also connect target blood vessels on both sides. The stent 112 includes a first stent 1121 and a second stent 1122. The fixing ring 113 includes a first fixing ring 1131 and a second fixing ring 1132. The pull wire 114 includes a first pull wire 1141 and a second pull wire 1142. One end of the first stent 1121 is connected to one end of the artificial blood vessel 111. The end of the artificial blood vessel 111 connected to the first stent 1121 is also connected to one end of the first fixing ring 1131. One end of the second stent 1122 is connected to the other end of the artificial blood vessel 111. The end of the artificial blood vessel 111 connected to the second stent 1122 is also connected to one end of the second fixing ring 1132. The first pull wire 1141 can be looped around the first stent 1121, and the second pull wire 1142 can be looped around the second stent 1122. That is, the artificial blood vessel 111 is connected between the first stent 1121 and the second stent 1122. The first fixing ring 1131 is located outside the first stent 1121, and the end side of the first fixing ring 1131 near the artificial blood vessel 111 is connected to the end side of the first stent 1121 near the second stent 1122. The second fixing ring 1132 is located outside the second stent 1122, and the second fixing ring 1132 is connected to the end side of the second stent 1122 near the first stent 1121. In use, one end of the sutureless blood vessel 11 is aligned with a target blood vessel on one side. Then, the first stent 1121 is inserted into the target blood vessel, and the first fixing ring 1131 is placed outside the target blood vessel. Next, the first pull wire 1141 is pulled, clamping the first stent 1121 and the first fixing ring 1131 onto the target blood vessel on one side. The other end of the sutureless blood vessel 11 is clamped onto the target blood vessel on the other side using the same method via the second stent 1122, the second fixing ring 1132, and the second pull wire 1142. This configuration further facilitates operation and accelerates the connection between the sutureless blood vessel 11 and the target blood vessel.

[0052] Please see Figure 2 - Figure 5To reduce the weight of the fixing ring 113 while ensuring the clamping force between the fixing ring 113 and the support 112, thereby ensuring that the fixing ring 113 and the support 112 can stably clamp the target blood vessel, the fixing ring 113 includes a first hollow portion 1133, which is a hollow structure that penetrates the inner and outer surfaces of the fixing ring 113. The first hollow portion 1133 includes multiple supporting hollow areas 1134 and multiple friction hollow areas 1135, which are alternately arranged in the circumferential direction. The supporting hollow areas 1134 are used to ensure the overall structural strength of the fixing ring 113 while minimizing its weight, and to ensure the supporting force at the end of the fixing ring 113, ensuring that the fixing ring 113 and the support 112 can stably clamp the target blood vessel and avoid blood leakage due to insufficient support force of the fixing ring 113. The friction perforated area 1135 is used to increase the friction between the fixing ring 113 and the target blood vessel while minimizing the weight of the fixing ring 113, thereby ensuring that the fixing ring 113 and the stent 112 can stably clamp the target blood vessel. Specifically, the axial length of the support perforated area 1134 is less than the axial length of the friction perforated area 1135, and the circumferential length of the support perforated area 1134 is greater than the circumferential length of the friction perforated area 1135. The friction perforated area 1135 includes a first friction area 11351 and a second friction area 11352, which are arranged side by side and spaced apart along the axial direction. In the first embodiment of the invention, the support perforated area 1134 is a large hexagonal structure, while the friction perforated area 1135 is composed of two smaller hexagonal structures, that is, the first friction area 11351 and the second friction area 11352 are two smaller hexagonal structures. It should be noted that both the supporting hollow area 1134 and the friction hollow area 1135 can reduce the weight of the fixing ring 113 and increase the friction between the fixing ring 113 and the target blood vessel. With the above arrangement, when the support 112 presses the outer wall of the target blood vessel tightly against the inner wall of the fixing ring 113, part of the outer wall of the target blood vessel will enter the smaller first friction area 11351 and the second friction area 11352, thereby increasing the friction between the fixing ring 113 and the target blood vessel.Between the supporting perforated area 1134 and the two adjacent friction perforated areas 1135, due to the size difference, there is a supporting non-perforated area S1 between the supporting perforated area 1134 and the two adjacent friction perforated areas 1135. This ensures the supporting performance at the end of the fixing ring 113 and the sealing performance when the fixing ring 113 and the support 112 clamp the target blood vessel. Therefore, through the above arrangement, the fixing ring 113 can balance supporting performance, friction with the target blood vessel, and the overall lightness of the fixing ring 113.

[0053] Please see Figure 5 In other specific embodiments of the present invention, to give the fixing ring 113 a certain degree of flexibility so that it can adapt to blood vessels of different shapes, the fixing ring 113 can have a structure having a fixing part 1136, an adapting part 1137, and a connecting part 1138. Specifically, the connecting part 1138 includes a plurality of connecting holes 11381, which can be connected to the artificial blood vessel 111 by sutures, thereby realizing the connection between the fixing ring 113 and the artificial blood vessel 111. The connecting part 1138 is connected to the adapting part 1137, which includes a braided mesh tube, which can be woven from nickel-titanium wire. The adapting part 1137 has good flexibility, thereby allowing the fixing ring 113 to be bent to a large extent to adapt to target blood vessels of different shapes. At the same time, the adapting part 1137 is thin and light, which can also reduce the overall weight of the fixing ring 113. Furthermore, a film can be applied to the adapting part 1137, or a heat-shrinkable tube can be installed on the adapting part 1137 by heat shrinking, thereby ensuring the sealing and supporting performance of the fixing ring 113. The end of the adapting part 1137 away from the connecting part 1138 is connected to the fixing part 1136, which is a solid ring structure to ensure the clamping force between the fixing ring 113 and the bracket 112. To balance the overall supporting performance, flexibility, and light weight of the fixing ring 113, the ratio of the axial length of the adapting part 1137 to the axial length of the fixing ring 113 is 1 / 3 to 1 / 2. It should be noted that the adapting part 1137 and the connecting part 1138 are also applicable to the fixing ring 113 with the first hollowed-out part 1133. The adapting part 1137 and the connecting part 1138 can be adapted to the fixing ring 113 with the first hollow part 1133 according to actual needs.

[0054] Please see Figure 4 , Figure 6 , Figure 7 and Figure 8To further ensure the clamping force between the fixing ring 113 and the stent 112 in holding the target blood vessel, a plurality of clamping brackets 115 are provided on the side of the stent 112 connected to the artificial blood vessel 111, and the plurality of clamping brackets 115 are disposed on the outer surface of the stent 112. Each clamping bracket 115 includes a fixed section 1151 and a movable section 1152. One end of the movable section 1152 is connected to the fixed section 1151, and the other end is a free end. The fixed section 1151 is fixedly connected to the outer surface of the stent 112, and the free end of the movable section 1152 can rotate relative to the fixed section 1151. The fixing ring 113 includes a plurality of second hollow portions 1139 disposed near the artificial blood vessel 111, and the plurality of second hollow portions 1139 are evenly spaced in the circumferential direction on the fixing ring 113. When the bracket 112 is restrained and in a retracted state, the movable segment 1152 is disposed close to the outer surface of the bracket 112. When the bracket 112 is in a released state, the free end of the movable segment 1152 rotates relative to the fixed segment 1151 and passes through the second hollow portion 1139. At this time, the movable segment 1152 is in close contact with the outer surface of the fixed ring 113 (e.g., Figure 9A and Figure 9B (As shown). That is, when the bracket 112 is still in the retracted state, the clamping bracket 115 is also restrained. The clamping bracket 115 lies flat on the outer surface of the bracket 112, and the free end of the movable section 1152 is away from the fixed section 1151 (as shown). Figure 7 (As shown). When the bracket 112 is in the released state, the clamping bracket 115 can be released, and the free end of the movable segment 1152 rotates relative to the fixed segment 1151. The free end of the movable segment 1152 will pass through the second hollow structure and extend out of the fixed ring 113. Finally, the movable segment 1152 is fastened to the outer surface of the fixed ring 113 (as shown). Figure 8 , Figure 9A and Figure 9B As shown in the figure, this increases the clamping force between the fixing ring 113 and the stent 112, ensuring that the fixing ring 113 and the stent 112 tightly clamp the target blood vessel, thereby improving the connection strength between the sutureless blood vessel 11 and the target blood vessel and improving the sealing performance of the sutureless blood vessel 11.

[0055] Furthermore, to further improve the clamping effect of the clamping bracket 115, the second hollow portion 1139 is arranged in an arc shape on the side away from the artificial blood vessel 111, that is, the side of the second hollow portion 1139 closest to the first hollow portion 1133 is arranged in an arc towards the first hollow portion 1133. Please refer to... Figure 9A , Figure 9B and Figure 10The movable segment 1152 includes a first movable segment 11521 and a second movable segment 11522. The second movable segment 11522 is disposed close to the fixed segment 1151. The first movable segment 11521 and the second movable segment 11522 are connected to the side of the first movable segment 11521 away from the fixed segment 1151. The end of the first movable segment 11521 away from the second movable segment 11522 is a free end. When the bracket 112 is in the released state, that is, after the movable segment 1152 rotates relative to the fixed segment 1151, the fixed segment 1151 and the second movable segment 11522 have an angle of less than 90 degrees, and the first movable segment 11521 and the second movable segment 11522 have an angle of greater than 90 degrees and less than 180 degrees. Specifically, the arc-shaped arrangement allows the second hollow portion 1139 to be closer to the first hollow portion 1133, thereby allowing the movable segment 1152 to pass through the second hollow portion 1139 after rotating relative to the fixed segment 1151, and the free end of the first movable segment 11521 to enter the first hollow portion 1133. The angle between the fixed segment 1151 and the second movable segment 11522 is small, allowing the second movable segment 11522 to be as close as possible to the outside of the fixing ring 113. This ensures that the movable segment 1152 can increase the force applied by the fixing ring 113 to the target blood vessel, and increase the force with which the fixing ring 113 and the stent 112 clamp the target blood vessel. The first movable segment 11521 and the second movable segment 11522 have an angle greater than 90 degrees and less than 180 degrees, allowing the free end of the first movable segment 11521 to enter the supporting hollow area 1134 or the friction hollow area 1135 of the first hollow portion 1133. This allows the free end of the first movable segment 11521 to abut against the target blood vessel within the supporting hollow area 1134 or the friction hollow area 1135, creating a clamping force between the first movable segment 11521 and the stent 112. This further enhances the clamping force of the fixing ring 113, the clamping stent 115, and the stent 112 on the target blood vessel. Simultaneously, a pressing part can be provided on the side of the first fixed segment 1151 closer to the fixing ring 113 after rotation. This pressing part is formed by a protrusion on the side of the first fixed segment 1151 closer to the fixing ring 113. By setting the clamping part, the force of the first fixing section 1151 pressing on the target blood vessel is further increased, thereby further increasing the clamping force of the clamping bracket 115 and the bracket 112 in clamping the target blood vessel.

[0056] It should be noted that the fixed segment 1151 and the movable segment 1152 can be directly connected, that is, the fixed segment 1151 and the movable segment 1152 can be fixedly connected together by welding or other methods, or the fixed segment 1151 and the movable segment 1152 can be integrally formed. Furthermore, by pre-bending the connection between the fixed segment 1151 and the movable segment 1152, the movable segment 1152, after being unrestrained, returns to its pre-bent shape and rotates relative to the fixed segment 1151. Alternatively, a connector can be provided between the fixed segment 1151 and the movable segment 1152. This connector is pre-bent; when the support 112 is restrained and in a contracted state, the two ends of the connector are tightly attached to the outer surface of the support 112. When the support 112 is released, the connector returns to its pre-bent shape, causing the movable segment 1152 to rotate relative to the fixed segment 1151.

[0057] It should be noted that, please refer to Figure 11The clamping stent 115 can be secured in various ways. For example, the sutureless vascular system 1 also includes a third drawstring 114 (not shown). When the stent 112 is in the contracted state, the third drawstring 114 is looped around the clamping stent 115, thereby securing the clamping stent 115. When it is necessary for the movable segment 1152 to rotate relative to the fixed segment 1151, the third drawstring 114 is pulled away from the clamping stent 115, causing the movable segment 1152 to rotate relative to the fixed segment 1151. Alternatively, the stent 112 and the clamping stent 115 can be placed into the target blood vessel and then released via the delivery device 12. For example, the delivery device 12 includes a restraint assembly 121 disposed at the distal end and a release assembly 122 connected to the restraint assembly 121. The stent 112 can be restrained by the restraint assembly 121 and is in a contracted state. The release assembly 122 can move towards the proximal end to release the restraint assembly 121 from restraint. The stent 112 expands and unfolds, causing the restraint assembly 121 to expand and unfold, so that the outer surface of the restraint assembly 121 is tightly attached to the inner wall of the blood vessel. The stent 112 and the clamping stent 115 can also be released by combining the third pull wire 114 with the delivery device 12. For example, the restraint component 121 of the delivery device 12 restrains the stent 112, while the third pull wire 114 restrains the clamping stent 115 located on the outer surface of the stent 112. First, the restraint component 121 is released by the release component, thereby causing the stent 112 to expand and unfold, and driving the restraint component 121 to expand and unfold as well. The restraint component 121 is driven by the stent 112 and is stretched open by the stent 112 to fit tightly against the target blood vessel, that is, the restraint component 121 is between the target blood vessel and the stent 112. However, the restraint component 121 is not placed at the position of the clamping stent 115. Therefore, the third pull wire 114 can be pulled at this time to release the restraint of the clamping stent 115, thereby causing the movable segment 1152 to rotate relative to the fixed segment 1151 and clamp the target blood vessel. The conveyor 12 is existing technology. Various binding and release structures can be combined to bind and release the support 112. Here, one structure is used as an example for a simple explanation; other structures will not be described in detail. Specifically, the binding assembly 121 has a membrane 1211 and a tightening line 1212, and the release assembly 122 includes a fixing wire 1221. The membrane 1211 covers the support 112, thereby binding and contracting the support 112. The membrane 1211 has an opening in the axial direction, and the tightening line 1212 is connected to the opening in the axial direction. The fixing wire 1221 passes through the tightening line 1212 to fix the tightening line 1212.After the fixing wire 1221 moves towards the proximal end and separates from the tightening wire 1212, the tightening wire 1212 loses the fixation of the fixing wire 1221 and is driven by the force of the expansion of the bracket 112 to detach from the membrane 1211. Since the membrane 1211 has an opening, the membrane 1211 will also be driven by the expansion of the bracket 112 and thus expand, allowing the bracket 112 to expand smoothly.

[0058] Please see Figure 12 The second embodiment of the present invention provides a sutureless vascular system 2. The main difference between the sutureless vascular system 2 of the second embodiment and the sutureless vascular system 1 of the first embodiment lies in the structure of the sutureless vascular system. The sutureless vascular system 2 includes a sutureless vascular system 21, which includes an artificial blood vessel 211, a locking ring 212, and a fixing ring 213. The artificial blood vessel 211 is connected to either the locking ring 212 or the fixing ring 213. The fixing ring 213 and the locking ring 212 are respectively disposed on the inner or outer side of the target blood vessel. The diameter of the locking ring 212 can be increased or decreased to clamp the target blood vessel between the locking ring 212 and the fixing ring 213. Specifically, when the fixing ring 213 is connected to the artificial blood vessel 211, the diameter of the fixing ring 213 is smaller than the diameter of the target blood vessel. After the fixing ring 213 enters the target blood vessel, the locking ring 212 is sleeved on the outer surface of the target blood vessel corresponding to the position of the fixing ring 213. The locking ring 212 contracts, and the diameter of the locking ring 212 decreases so that the locking ring 212 is tightly attached to the outer wall of the target blood vessel. The fixing ring 213 provides support for the target blood vessel and the locking ring 212, so that the locking ring 212 and the fixing ring 213 together clamp the target blood vessel, thereby realizing the connection between the sutureless blood vessel 21 and the target blood vessel. The number of fixing rings 213 can be two, and the two fixing rings 213 are respectively connected to both ends of the artificial blood vessel 211. The number of locking rings 212 is also two. In use, the two locking rings 212 are first placed on the target blood vessels on both sides, and then the two fixing rings 213 are inserted into the target blood vessels on both sides, with the position of the locking rings 212 corresponding to the position of the fixing rings 213. The locking rings 212 contract to clamp the target blood vessels with the fixing rings 213, thereby realizing the connection of the sutureless blood vessel 21 to the target blood vessels on both sides.

[0059] Please see Figure 13When the fixing ring 213 is connected to the artificial blood vessel 211, the diameter of the fixing ring 213 is larger than the diameter of the target blood vessel, and the initial diameter of the locking ring 212 is smaller than the diameter of the target blood vessel. In use, the locking ring 212 is placed inside the target blood vessel, and the fixing ring 213 is fitted onto the outer surface of the target blood vessel corresponding to the position of the locking ring 212. Then, the locking ring 212 is expanded, increasing its diameter so that it clamps the target blood vessel with the fixing ring 213, thereby connecting the sutureless blood vessel 21 to the target blood vessels on both sides. Similarly, there can be two fixing rings 213, each connected to one end of the artificial blood vessel 211, and two locking rings 212, both with an initial diameter smaller than the target blood vessel. In use, first, the two locking rings 212 are respectively inserted into the target blood vessels on both sides. Then, the two fixing rings 213 are respectively fitted onto the target blood vessels on both sides, ensuring that the locking rings 212 and the fixing rings 213 are positioned in tandem. Subsequently, the two locking rings 212 located within the target blood vessels are expanded, increasing their diameter so that the two locking rings 212 and the two fixing rings 213 respectively clamp the target blood vessels on both sides, thereby achieving the connection of the sutureless blood vessel 21 to the target blood vessels on both sides.

[0060] Please see Figure 14 When the locking ring 212 is connected to the artificial blood vessel 211, the diameter of the locking ring 212 in its initial state is smaller than that of the target blood vessel. After the locking ring 212 enters the target blood vessel, the fixing ring 213 is fitted onto the outer surface of the target blood vessel corresponding to the position of the locking ring 212. The locking ring 212 expands, and its diameter increases so that the locking ring 212 and the fixing ring 213 clamp the target blood vessel, thereby achieving the connection between the sutureless blood vessel 21 and the target blood vessel. Similarly, there can be two locking rings 212 and two fixing rings 213, with the two locking rings 212 connected to both ends of the artificial blood vessel 211 respectively. In use, the two fixing rings 213 are first fitted onto the target blood vessels on both sides, and then the target blood vessels on both sides are respectively fitted onto the two locking rings 212, with the positions of the two locking rings 212 corresponding to the positions of the two fixing rings 213. Subsequently, the two locking rings 212 are expanded, and the diameter of the two locking rings 212 is increased so that the two locking rings 212 and the two fixing rings 213 respectively clamp the target blood vessels on both sides, thereby realizing the connection of the sutureless blood vessel 21 to the target blood vessels on both sides.

[0061] Please see Figure 15When the locking ring 212 is connected to the artificial blood vessel 211, the diameter of the fixing ring 213 is smaller than that of the target blood vessel. The fixing ring 213 enters the target blood vessel, and the locking ring 212 is fitted onto the outer surface of the target blood vessel corresponding to the position of the fixing ring 213. The locking ring 212 contracts, and its diameter decreases so that the locking ring 212 and the fixing ring 213 clamp the target blood vessel, thereby achieving the connection between the sutureless blood vessel 21 and the target blood vessel. Similarly, there can be two locking rings 212 and two fixing rings 213, with the two locking rings 212 connected to both ends of the artificial blood vessel 211. In use, the two fixing rings 213 are first placed into the target blood vessels on both sides, and then the two locking rings 212 are fitted onto the two target blood vessels, with the positions of the two locking rings 212 corresponding to the positions of the two fixing rings 213. Subsequently, the two locking rings 212 are contracted, and the diameter of the two locking rings 212 is reduced so that the two locking rings 212 and the two fixing rings 213 respectively clamp the target blood vessels on both sides, thereby realizing the connection of the sutureless blood vessel 21 to the target blood vessels on both sides.

[0062] Please see Figure 16In one embodiment of the present invention, the locking ring 212 includes a locking ring body 2121. One end of the locking ring body 2121 extends to the other end to form a snap-fit ​​portion 2122, and the other end of the locking ring body 2121 is recessed away from the snap-fit ​​portion 2122 to form a snap-fit ​​groove 2123. The snap-fit ​​portion 2122 is connected to the snap-fit ​​groove 2123. The extent to which the snap-fit ​​portion 2122 enters the snap-fit ​​groove 2123 determines the diameter of the locking ring 212. For example, in an embodiment where the locking ring 212 is fitted onto the outer surface of a target blood vessel, the portion of the snap-fit ​​portion 2122 entering the snap-fit ​​groove 2123 is smaller, resulting in a larger diameter of the locking ring 212 in the initial state, thereby allowing the locking ring 212 to be fitted onto the target blood vessel. When it is necessary to retract the locking ring 212 to reduce its diameter, hold the locking ring 212 by hand and apply force to its interior. This causes more of the locking portion 2122 to enter the locking groove 2123, thereby reducing the diameter of the locking ring 212 until the locking ring 212 and the fixing ring 213 clamp the target blood vessel. In the embodiment where the locking ring 212 is placed into the target blood vessel, the initial diameter of the locking ring 212 is small, and a larger portion of the locking portion 2122 enters the locking groove 2123. When it is necessary to expand the locking ring 212 to increase its diameter, the locking ring 212 can be expanded by means of an instrument, so that the portion of the locking part 2122 in the locking groove 2123 gradually moves from inside the locking groove 2123 to outside the locking groove 2123, thereby increasing the diameter of the locking ring 212 until the locking ring 212 and the fixing ring 213 clamp the target blood vessel.

[0063] It should be noted that the artificial blood vessel 211 has good toughness and elasticity, and can expand or contract to a certain extent. Therefore, the locking ring 212 can be directly connected to the artificial blood vessel 211. When the diameter of the locking ring 212 changes, the artificial blood vessel 211 will undergo adaptive deformation accordingly. The fixing ring 213 can be replaced by the stent in the first embodiment of the present invention.

[0064] Furthermore, to ensure that the locking ring 212 is as lightweight as possible while maintaining overall support, the locking ring body 2121 is provided with multiple through holes 2124 penetrating the locking ring body 2121, and these through holes 2124 are evenly distributed on the locking ring body 2121. It should be noted that the multiple through holes 2124 can also be provided on the fixing ring 213, thereby allowing the fixing ring 213 to also provide overall support for the locking ring 212.

[0065] Please see Figure 17 In one embodiment of the present invention, the locking ring 212 includes a plurality of locking ring bodies 2121, which are evenly arranged circumferentially. One end of each locking ring body 2121 extends to the other end to form a snap-fit ​​portion 2122, and the other end of each locking ring body 2121 is recessed towards the snap-fit ​​portion 2122 to form a snap-fit ​​groove 2123. The snap-fit ​​portion 2122 of one locking ring body 2121 is connected to the snap-fit ​​groove 2123 of its adjacent locking ring body 2121, and the snap-fit ​​portion 2122 of an adjacent locking ring body 2121 is connected to the snap-fit ​​groove 2123 of another adjacent locking ring body 2121, and so on, thereby forming a ring-shaped locking ring 212 structure in which multiple locking ring bodies 2121 are interconnected. The expansion and contraction principle of the above structure is the same as that of the locking ring 212 in the figure, and will not be described again here. The above structure has more uniform expansion and contraction properties, which allows the locking ring 212 and the fixing ring 213 to clamp the target blood vessel more evenly in the circumferential direction when clamping the target blood vessel, ensuring the sealing performance of the locking ring 212 and the fixing ring 213 when clamping the target blood vessel.

[0066] Please see Figure 18 When the locking ring 212 is inserted into the target blood vessel and needs to be expanded, the sutureless vascular system 2 further includes a balloon catheter 22. The balloon catheter 22 includes a balloon 221 and a catheter 222, with the balloon 221 positioned at the distal end of the catheter 222. In use, the distal end of the balloon catheter 22 can be inserted into the artificial blood vessel 211, and then the balloon catheter 22 can be pushed until the balloon 221 is located within the locking ring 212. Subsequently, the balloon 221 is inflated, and the increased inflation of the balloon expands the locking ring 212, thereby achieving the expansion of the locking ring 212.

[0067] The sutureless vascular system 2 of the second embodiment of the present invention has a simple overall structure. The operator only needs to align the target blood vessel with the fixing ring 213 or locking ring 212, and then tighten or expand the locking ring 212 to complete the connection between the artificial blood vessel 211 and the target blood vessel. The sutureless vascular system 2 has high reliability, good sealing, and no blood leakage. It avoids the vascular torsion caused by the original method of using a ligature band during tightening, which affects hemodynamics. At the same time, the overall operation is simple, efficiency is significantly increased, and the operation time is effectively shortened.

[0068] Please see Figure 19The third embodiment of the present invention provides a sutureless vascular system 3. The main difference between the sutureless vascular system 3 and the sutureless vascular system 3 of the second embodiment lies in the different locking ring structure. The structural or principle-similar parts of the third embodiment and the second embodiment of the present invention will not be described again here. The sutureless vascular system 3 includes a sutureless vascular vessel 31, which includes a vascular component 311 and a locking device 312. The locking device 312 includes a locking ring 3121, and the diameter of the locking ring 3121 can be adjusted. One end of the vascular component 311 enters the target vascular vessel, and the locking ring 3121 is sleeved on the outer surface of the target vascular vessel corresponding to the position of the vascular component 311. The locking ring 3121 contracts to clamp the target vascular vessel with the vascular component 311 that has entered the target vascular vessel. Specifically, in one embodiment of the present invention, the vascular assembly 311 includes an artificial blood vessel 3111 and a fixing ring 3112. The fixing ring 3112 is connected to the artificial blood vessel 3111. The diameter of the fixing ring 3112 is smaller than that of the target blood vessel. The fixing ring 3112 enters the target blood vessel. The locking ring 3121 is sleeved on the outer surface of the target blood vessel corresponding to the position of the fixing ring 3112. The locking ring 3121 contracts to clamp the target blood vessel with the fixing ring 3112. Consistent with the second embodiment, there are two locking devices 312 and two corresponding fixing rings 3112. The two fixing rings 3112 are respectively connected to both ends of the artificial blood vessel 3111. The two fixing rings 3112 enter the target blood vessels on both sides respectively. The two locking rings 3121 are respectively sleeved on the outer surface of the target blood vessels on both sides corresponding to the positions of the fixing rings 3112. The locking rings 3121 contract to clamp the target blood vessels with the fixing rings 3112.

[0069] In one embodiment of the present invention, the vascular assembly 311 includes an artificial blood vessel 3111 and a stent (not shown). The stent is connected to the artificial blood vessel 3111. Initially, the stent is restrained and in a contracted state. The stent enters the target blood vessel. Releasing the stent causes it to expand and unfold, adhering tightly to the inner wall of the target blood vessel. A locking ring 3121 is fitted onto the outer surface of the target blood vessel corresponding to the position of the stent. The locking ring 3121 contracts to clamp the target blood vessel with the stent. The stent structure is consistent with that in the first embodiment, and the release and restraint methods are also consistent, and will not be described again here. Similarly, consistent with the second embodiment, the number of locking devices 312 can be two, and the number of stents is correspondingly two. The two stents are respectively connected to both ends of the artificial blood vessel 3111. In the initial state, the two stents are in a contracted state and enter the target blood vessels on both sides respectively. Then, the two stents are released so that the two stents expand and tightly adhere to the inner walls of the target blood vessels on both sides. The two locking rings 3121 are respectively sleeved on the outer surface of the target blood vessels on both sides corresponding to the stent positions. The locking rings 3121 contract so that the locking rings 3121 and the fixing rings 3112 clamp the target blood vessels.

[0070] Please see Figure 19 and Figure 20 The locking device 312 further includes a locking assembly 3122. One end of the locking ring 3121 is fixedly connected to the locking assembly 3122, and the other end of the locking ring 3121 passes through the locking assembly 3122. That is, after one end of the locking ring 3121 is fixedly connected to the locking assembly 3122, the other end of the locking ring 3121 is a free end, and the other end of the locking assembly 3122 is also a free end. The free end of the locking ring 3121 wraps around the locking assembly 3122 and then enters the locking assembly 3122 from the free end, allowing the locking assembly 3122 to move on the locking ring 3121. The movement of the locking assembly 3122 then drives one end of the locking ring 3121 to move relative to the free end. The relative movement of the two ends of the locking ring 3121 thus adjusts the diameter of the locking ring 3121. Further, please refer to... Figure 21 and Figure 22The locking assembly 3122 includes a locking body 3123 and a locking member 3124. One end of the locking ring 3121 is fixedly connected to one end of the locking body 3123, and the free end of the locking ring 3121 passes through the free end of the locking body 3123. Sliding grooves 31231 are provided on both sides of the locking body 3123. One end of the sliding groove 31231 is close to the locking ring 3121, and the other end extends away from the locking ring 3121. That is, one end of the sliding groove 31231 is close to the locking ring 3121, and the other end is away from the locking ring 3121. Both ends of the locking member 3124 are connected to the sliding grooves 31231 on both sides, thereby connecting the locking member 3124 to the locking body 3123, and the locking member 3124 can move along the sliding grooves 31231. The locking ring 3121 has multiple engaging grooves 31211 on its side facing the locking assembly 3122. These grooves are evenly distributed on the locking ring 3121. The locking member 3124 can move towards the end of the sliding groove 31231 closer to the locking ring 3121, so that the locking member 3124 engages within the engaging groove 31211, thereby restricting the movement of the locking assembly 3122 relative to the locking ring 3121. When the locking member 3124 is on the side of the sliding groove 31231 away from the locking ring 3121, the locking member 3124 is not engaged in the locking groove 31211. At this time, the operator can adjust the diameter of the locking ring 3121. After adjusting the locking ring 3121 to the ideal diameter, the locking member 3124 is slid to the side of the sliding groove 31231 closer to the locking ring 3121, thereby engaging the locking member 3124 in the locking groove 31211. At this time, the locking ring 3121 is restricted, and the diameter of the locking ring 3121 can no longer be adjusted, thus enabling the locking ring 3121 to clamp the target blood vessel with the fixing ring 3112 or the stent.

[0071] Further, please refer to Figure 20 - Figure 23The locking assembly 3122 further includes an adjusting member 3125 and a rotating shaft 3126. The locking body 3123 has rotating shaft holes 31232 on both sides. The rotating shaft 3126 passes through the adjusting member 3125, and both ends of the rotating shaft 3126 are connected to the rotating shaft holes 31232 on both sides. The adjusting member 3125 can rotate relative to the locking body 3123 with the rotating shaft 3126 as its axis. One end of the locking ring 3121 passes through the locking body 3123 and is positioned between the locking body 3123 and the adjusting member 3125. The side of the adjusting member 3125 facing the locking ring 3121 protrudes to form an arc-shaped lever 31251, and the arc-shaped lever 31251 is positioned close to the rotating shaft 3126. The end of the adjusting member 3125 away from the arc-shaped lever 31251 rotates away from the locking body 3123. Since the arc-shaped lever 31251 is positioned close to the rotating shaft 3126, it does not move away from the locking ring 3121; its movement is primarily around the rotating shaft 3126. During movement, the free end of the arc-shaped lever 31251 engages with the locking groove 31211, as shown in Figure 21. Subsequently, the adjusting member 3125 is reset towards the locking body 3123. The reset of the arc-shaped lever 31251 causes its free end to abut against the inner wall of the locking groove 31211. As the arc-shaped lever 31251 resets, its free end pushes against the locking groove 31211, thereby causing the locking assembly 3122 to move on the locking ring 3121. The movement of the locking assembly 3122 causes one end of the locking ring 3121 to move relative to the other end, thus adjusting the diameter of the locking ring 3121. It should be noted that during operation, one hand is often needed to act on the locking assembly 3122, while the other hand pulls the free end of the locking ring 3121 to adjust its diameter. During surgery, the operator's hands are confined to the body, limiting their operational and movement space. By incorporating the adjusting element 3125 and the arc-shaped lever 31251, the operator can adjust the size of the locking ring 3121 simply by rotating the adjusting element 3125 with one hand, significantly increasing the convenience of the surgical process. It also allows for fine-tuning of the locking ring 3121's size, preventing the operator from over-adjusting its diameter due to improper force control.

[0072] It should be noted that the arc-shaped lever 31251 can have a certain elastic deformation. When the adjusting member 3125 is rotated and reset, the arc-shaped lever 31251 can deform and then leave the locking groove 31211.

[0073] Please continue reading. Figure 21 The locking member 3124 includes a connecting post 31241, with both ends of the connecting post 31241 connected to the sliding grooves 31231 on both sides. Multiple protrusions 31242 are formed on the outer surface of the connecting post 31241 along its axial direction. These protrusions 31242 are evenly spaced along the circumferential direction of the connecting post 31241. The protrusions 31242 can be engaged with the engaging grooves 31211, thereby achieving engagement between the locking member 3124 and the engaging grooves 31211. Please refer to the following for further information. Figure 22 The locking member 3124 may also include a wedge block 31243, with a connecting post 31241 disposed on one side of the wedge block 31243. Both ends of the connecting post 31241 are connected to the sliding grooves 31231 on both sides. A protrusion 31242 is formed on the side of the wedge block 31243 facing the locking ring 3121 away from the connecting post 31241. The protrusion 31242 can be engaged in the engaging groove 31211. The wedge block 31243 further enhances the engagement strength between the protrusion 31242 and the engaging groove 31211, preventing the protrusion 31242 from losing its fit due to external forces.

[0074] Compared with existing technologies, the sutureless vascular system of the present invention has the following advantages: The sutureless vascular system of the present invention can effectively control the pre-tightening force of the target blood vessel incision, that is, the force with which the stent and fixing ring clamp the target blood vessel, avoiding differences in pre-tightening force due to individual operator differences, thereby avoiding various complications and even surgical failure. Simultaneously, the connection between the artificial blood vessel and the target blood vessel is completed simply by placing the stent into the target blood vessel and then releasing the stent, simplifying the operation and greatly shortening the surgical time. Furthermore, the sutureless vascular system has a simple structure, is easier to manufacture, and has lower manufacturing costs.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sutureless vascular system, characterized in that: The sutureless vascular system includes a sutureless blood vessel, which comprises an artificial blood vessel, a stent, and a fixation ring. One end of the fixation ring is connected to one end of the artificial blood vessel, and the end of the artificial blood vessel connected to the fixation ring is simultaneously connected to one end of the stent. The fixation ring is positioned around the outside of the stent. In the initial state, the stent is restrained and in a contracted state, and the distal end of the stent can enter the target blood vessel. The fixation ring can be positioned outside the target blood vessel. In the release state, the stent is released and expands. After the stent expands, the target blood vessel is clamped between the stent and the fixation ring.

2. The sutureless vascular system as described in claim 1, characterized in that: The sutureless vascular system includes a pull cord, which is looped on the stent so that the stent can be in a contracted state when bound by the pull cord. Pulling the pull cord away from the stent can release the stent and allow it to expand.

3. The sutureless vascular system as described in claim 2, characterized in that: The stent includes a first stent and a second stent, and the fixing ring includes a first fixing ring and a second fixing ring. The artificial blood vessel is connected between the first stent and the second stent. The first fixing ring is located outside the first stent, and the end of the first fixing ring near the artificial blood vessel is connected to the end of the first stent near the second stent. The second fixing ring is located outside the second stent, and the end of the second stent near the first stent is connected to the end of the second stent near the first stent. The first pull wire can be looped around the first stent, and the second pull wire can be looped around the second stent.

4. The sutureless vascular system as described in claim 1, characterized in that: The fixing ring includes a first hollow portion, which includes multiple supporting hollow areas and multiple friction hollow areas. The multiple supporting hollow areas and the multiple friction hollow areas are alternately spaced in the circumferential direction. The axial length of the supporting hollow area is less than the axial length of the friction hollow area, and the circumferential length of the supporting hollow area is greater than the circumferential length of the friction hollow area. The friction hollow area includes a first friction area and a second friction area, which are arranged side by side and spaced apart along the axial direction.

5. The sutureless vascular system as described in claim 1, characterized in that: The fixing ring includes a plurality of second hollow portions disposed near the artificial blood vessel. The plurality of second hollow portions are evenly spaced on the fixing ring in the circumferential direction, and the side of the second hollow portion away from the artificial blood vessel is arranged in an arc shape.

6. The sutureless vascular system as described in claim 1, characterized in that: The fixing ring includes a fixing part, an adapting part, and a connecting part. The adapting part is connected between the fixing part and the connecting part. The connecting part is used to connect with the artificial blood vessel. The adapting part includes a braided mesh tube.

7. The sutureless vascular system as described in claim 1, characterized in that: The stent is provided with multiple connected clamping stents on one side of the stent connected to the artificial blood vessel, and the multiple clamping stents are disposed on the outer surface of the stent. Each clamping stent includes a fixed section and a movable section. One end of the movable section is connected to the fixed section, and the other end is a free end. The fixed section is fixedly connected to the outer surface of the stent, and the free end of the movable section can rotate relative to the fixed section. When the stent is restrained and in a contracted state, the movable section is disposed close to the outer surface of the stent. When the stent is in a released state, the free end of the movable section can rotate relative to the fixed section so that the movable section can be close to the outer surface of the fixed ring.

8. The sutureless vascular system as described in claim 7, characterized in that: The movable section includes a first movable section and a second movable section connected axially. The first movable section is connected to the fixed section through the second movable section. When the bracket is in the released state, the fixed section and the second movable section have an angle of less than 90 degrees, and the first movable section and the second movable section have an angle of greater than 90 degrees and less than 180 degrees.

9. The sutureless vascular system as described in claim 7, characterized in that: The fixed section is fixedly connected to the movable section; or a connector is provided between the fixed section and the movable section. When the support is constrained and in a contracted state, the two ends of the connector are tightly attached to the outer surface of the support. When the support is in a released state, the connector bends, causing the movable section to rotate relative to the fixed section.

10. The sutureless vascular system as described in any one of claims 7-9, characterized in that: The sutureless vascular system also includes a third pull wire. When the stent is in the contracted state, the third pull wire is looped around the clamping stent. Pulling the third pull wire can cause the third pull wire to move away from the clamping stent, thereby causing the movable segment to rotate relative to the fixed segment.

11. The sutureless vascular system as described in any one of claims 7-9, characterized in that: The sutureless vascular system also includes a delivery device, which includes a restraint assembly disposed at a distal end and a release assembly connected to the restraint assembly. The stent can be restrained by the restraint assembly and is in a contracted state. The release assembly can move proximally to release the restraint assembly. The stent expands and unfolds, causing the restraint assembly to expand and unfold, so that the outer surface of the restraint assembly is tightly attached to the inner wall of the blood vessel.

Images