Blocking device and artificial blood vessel system

Abstract

This application relates to a blocking device and an artificial blood vessel system. The outer support body includes multiple modular splicing components, which are assembled together to form a cylindrical structure. The cylindrical structure has an assembly cavity extending through both ends. The inner support body has an internal channel extending through both ends. The inner support body is used to assemble within the assembly cavity of the outer support body, keeping the outer support body in a spliced ​​state. With the help of the blocking device, intraoperative anastomosis can be performed while maintaining perfusion of the patient's lower limb organs, reducing the time when blood circulation to the patient's lower limb organs stops. After the anastomosis is completed, the blocking device can be completely withdrawn from the autologous blood vessel, leaving no device in the autologous blood vessel, avoiding the uncertainty of long-term effects caused by leaving a device in the body. Moreover, the blocking device can reduce its outer contour volume during withdrawal, avoiding situations where the blocking device is difficult or impossible to remove due to narrow anastomosis channels.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a blocking device and an artificial blood vessel system. Background Technology

[0002] In the treatment of aortic diseases, such as aortic dissection, aortic replacement surgery often involves stopping blood circulation to the lower limb organs during the anastomosis of the artificial and autologous blood vessels due to the limited surgical field. This is done to ensure ease of operation. The longer the circulatory arrest, the more severe the damage to the patient's organs. Studies show that skilled surgeons require 10 to 15 minutes for the anastomosis of the artificial and autologous blood vessels during aortic replacement. Reducing the time spent stopping blood circulation to the lower limb organs during surgery can effectively improve the protection of the patient's organs. Currently, the mainstream method to reduce the time spent stopping blood circulation to the lower limb organs during surgery is to shorten the anastomosis time using sutureless techniques. However, this method leaves a relatively rigid supporting component within the blood vessel, and its long-term effects on the body are uncertain. Furthermore, the effectiveness of intraoperative hemostasis is uncertain, and if hemostasis fails, re-needling also presents certain difficulties and risks. Summary of the Invention

[0003] Therefore, it is necessary to provide a blocking device and an artificial blood vessel system to address the aforementioned technical problems.

[0004] This application provides a blocking device, the blocking device comprising:

[0005] An external support body, comprising multiple unit splicing components, wherein the external support body is assembled together by all the unit splicing components to form a cylindrical structure, the cylindrical structure having an assembly cavity that extends through both ends, and the external support body having a spliced ​​state in which all the unit splicing components are spliced ​​together, and a separated state in which all the unit splicing components are separated from each other;

[0006] An inner support body has an internal channel that extends through both ends. The inner support body is used to assemble the outer support body in the assembly cavity to keep the outer support body in the spliced ​​state.

[0007] In one embodiment, the outer wall of the inner support has a plurality of circumferentially distributed unit splicing areas, and each of the unit splicing components of the outer support is positioned and assembled with a corresponding unit splicing area on the inner support.

[0008] In one embodiment, a positioning component is provided between the unit splicing component and the unit splicing area, and the unit splicing component and the unit splicing area are positioned and assembled by the positioning component.

[0009] In one embodiment, the positioning component includes a positioning groove located on the inner sidewall of the unit splicing component, and a positioning protrusion located in the unit splicing area, wherein the positioning groove and the positioning protrusion are positioned and assembled.

[0010] In one embodiment, the sidewalls of the positioning groove facing the distal end are closed, while the sidewalls of the positioning groove facing the proximal end are open, allowing only the inner support to move relative to the outer support in the proximal direction.

[0011] In one embodiment, a portion of the unit splicing components are square splicing blocks, and another portion of the unit splicing components are fan-shaped splicing blocks. All the square splicing blocks and all the fan-shaped splicing blocks are sequentially spaced and spliced ​​along the circumference to form the outer support body.

[0012] In one embodiment, the blocking device includes:

[0013] The retaining sleeve is made of a deformable material and is fitted onto the outside of the outer support body to keep the outer support body in the spliced ​​state.

[0014] In one embodiment, the retaining sleeve is fixedly connected to at least one of the unit splicing components in the outer support; and / or,

[0015] The outer side wall of the unit splicing component has a limiting groove, which is used to accommodate the retaining sleeve.

[0016] In one embodiment, the blocking device includes:

[0017] A conveying assembly connected to at least one of the outer support and the inner support for conveying or retracting at least one of the outer support and the inner support.

[0018] In one embodiment, the conveying component includes:

[0019] A conveying component, said conveying component being detachably connected to said inner support; and / or,

[0020] A retraction component, wherein the retraction component is connected to at least one of the outer support and the inner support.

[0021] In one embodiment, the conveying component includes:

[0022] A connecting end, which is threadedly connected to the inner support body;

[0023] A conveying rod body, which is connected to the connecting end.

[0024] In one embodiment, the retraction component includes:

[0025] The first retraction thread is connected to the unit splicing component; and / or

[0026] The second retraction thread is connected to the inner support body.

[0027] In one embodiment, each of the unit splicing components has a first threading channel extending through both ends. The opening area of ​​the distal end of the first threading channel is larger than the opening area of ​​the proximal end of the first threading channel. The first threading channel is used to thread the first retraction thread; and / or,

[0028] The inner support body has a second threading channel that runs through both ends. The opening area of ​​the far end of the second threading channel is larger than the opening area of ​​the near end of the second threading channel. The second threading channel is used to thread the second retraction thread.

[0029] This application also provides an artificial blood vessel system, the artificial blood vessel system comprising:

[0030] An artificial blood vessel, comprising a main blood vessel and branch blood vessels, wherein the branch blood vessels are connected to the side of the main blood vessel;

[0031] The blocking device is used to connect the main blood vessel and the autologous blood vessel.

[0032] In one embodiment, the artificial blood vessel further includes:

[0033] A perfusion branch tube, wherein the perfusion branch tube is connected to the side of the main blood vessel; and / or,

[0034] A ligating attachment is used to ligate and fix the overlapping area of ​​the artificial blood vessel and the autologous blood vessel to the outside of the outer support of the blocking device.

[0035] In the aforementioned blocking device and artificial blood vessel system, the inner and outer supports of the blocking device can be initially constructed in a spliced ​​state and delivered to the overlapping area between the artificial blood vessel and the autologous blood vessel. The overlapping area of ​​the artificial blood vessel and the autologous blood vessel is then ligated and fixed to the outside of the outer support. Perfusion to the patient's lower limb organs is achieved solely through the perfusion branch tube. During this process, the surgeon can perform the anastomosis connection between the artificial blood vessel and the autologous blood vessel without stopping the blood perfusion to the patient's lower limb organs, thus reducing the time when blood circulation to the patient's lower limb organs is interrupted. After the anastomosis operation is completed, the inner and outer supports of the blocking device can be constructed in a separate state to completely withdraw from the autologous blood vessel, leaving no device inside the autologous blood vessel and avoiding the uncertainty of long-term effects caused by leaving a device in the body. Moreover, during the withdrawal process, the outer contour volume of the blocking device can be reduced due to the conversion to a separate state, avoiding situations where the blocking device is difficult or impossible to remove due to narrow anastomosis channels. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the splicing state structure of the blocking device provided in one embodiment of this application.

[0037] Figure 2 This is a schematic diagram of the separation state structure of the blocking device provided in one embodiment of this application.

[0038] Figure 3 This is a schematic diagram of the structure of a unit splicing component provided in one embodiment of this application.

[0039] Figure 4 For example Figure 3 A cross-sectional view of the unit splicing component provided in the illustrated embodiment.

[0040] Figure 5 For example Figure 3 The side view of the unit splicing component provided in the embodiment shown.

[0041] Figure 6 This is a schematic diagram of the structure of a unit splicing component provided in another embodiment of this application.

[0042] Figure 7 For example Figure 6 A cross-sectional view of the unit splicing component provided in the illustrated embodiment.

[0043] Figure 8 For example Figure 6 The side view of the unit splicing component provided in the embodiment shown.

[0044] Figure 9 This is a schematic diagram of the internal support structure provided in one embodiment of this application.

[0045] Figure 10For example Figure 9 A cross-sectional view of the inner support provided in the illustrated embodiment.

[0046] Figure 11 For example Figure 9 Side view of the inner support provided in the illustrated embodiment.

[0047] Figure 12 This is a schematic diagram of the structure of a connection end provided in one embodiment of this application.

[0048] Figure 13 This is a schematic diagram of the use of an artificial blood vessel system provided in one embodiment of this application.

[0049] Figure 14 For example Figure 13 A partial sectional view of the artificial blood vessel system provided in the illustrated embodiment.

[0050] Figure 15 This is a schematic diagram of the use of an artificial blood vessel system provided in another embodiment of this application.

[0051] Figure 16 For example Figure 15 A partial sectional view of the artificial blood vessel system provided in the illustrated embodiment.

[0052] Figure 17 This is a perspective view of a binding attachment provided in one embodiment of this application.

[0053] Figure 18 This is a plan view of a binding attachment provided in one embodiment of this application.

[0054] Icon labels:

[0055] 1000, External support; 2000, Internal support; 3000, Retaining sleeve; 4000, Delivery assembly; 5000, Artificial blood vessel; 6000, Autologous blood vessel;

[0056] 1100, Unit splicing component; 1000a, Splicing state; 1000b, Separated state;

[0057] 1100a, Positioning groove; 1100b, Limiting groove; 1100c, First threading channel;

[0058] 2000a, Positioning protrusion; 2000b, Second threading channel;

[0059] 4100. Conveying component; 4200. Retraction component;

[0060] 4100a, Connecting end; 4100b, Conveying rod; 4100c, Holding end;

[0061] 4200a, First retraction yarn; 4200b, Second retraction yarn;

[0062] 5100, Main blood vessel; 5200, Branch blood vessel; 5300, Irrigation branch canal;

[0063] 6000a, overlapping vascular area; 6000b, ligation of attachments. Detailed Implementation

[0064] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0065] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0066] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0068] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0069] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0070] To more clearly describe the structure of the blocking device, the term "distal" is defined herein as the end furthest from the operator during the surgical procedure, and "proximal" as the end closest to the operator during the surgical procedure. Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application's specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0071] See Figure 1 and Figure 2 As shown in the figure, an embodiment of this application provides a blocking device, which includes an outer support body 1000 and an inner support body 2000. The outer support body 1000 includes multiple unit splicing components 1100. The outer support body 1000 is assembled together by the multiple unit splicing components 1100 to form a cylindrical structure. The cylindrical structure has an assembly cavity that extends through both ends. The outer support body 1000 has a splicing state 1000a in which the multiple unit splicing components 1100 are spliced ​​together, and a separation state 1000b in which the multiple unit splicing components 1100 are separated from each other. The inner support body 2000 has an internal channel that extends through both ends. The inner support body 2000 is used to assemble in the assembly cavity of the outer support body 1000 to keep the outer support body 1000 in the splicing state 1000a.

[0072] After the artificial blood vessel 5000 is delivered to the target location in the body, it needs to be pre-connected to the existing autologous blood vessel 6000. The connection method is that the end segment of the artificial blood vessel 5000 and the end segment of the autologous blood vessel 6000 are interlocked, thus creating a vascular overlap region 6000a between the artificial blood vessel 5000 and the autologous blood vessel 6000 (refer to [reference needed]). Figures 13 to 16 As shown in the diagram, the overlapping vascular region 6000a formed here is the anastomosis port of the artificial blood vessel 5000 and the autologous blood vessel 6000. The blocking device provided in this application is used to be delivered to the overlapping vascular region 6000a between the artificial blood vessel 5000 and the autologous blood vessel 6000 to ensure blood flow during the anastomosis of the artificial blood vessel 5000 and the autologous blood vessel 6000, thereby reducing the time that blood circulation to the lower limb organs is stopped during the operation.

[0073] Therefore, refer to Figure 1 and Figure 2 As shown, the cylindrical structure formed by the multiple unit splicing components 1100 included in the outer support 1000 needs to be suitable for delivery into the interior of the artificial blood vessel 5000 and the autologous blood vessel 6000, and needs to be adapted to the structure of the overlapping area 6000a of the blood vessels between the artificial blood vessel 5000 and the autologous blood vessel 6000. For example, the cylindrical structure formed by the outer support 1000 is a cylindrical structure, or it can be constructed as a slightly curved elliptical cylinder according to the actual shape of the overlapping area 6000a of the blood vessels. In addition, those skilled in the art can also design the cylindrical structure formed by the outer support 1000 to be other irregular cylindrical shapes based on various factors, which is not limited here.

[0074] The inner support 2000 serves as the basic internal support structure for supporting multiple unit splicing components 1100 and maintaining them in the spliced ​​state 1000a. The inner support 2000 can be constructed to adapt to the shape formed by the outer support 1000 in the spliced ​​state 1000a. For example, the inner support 2000 can also be a cylindrical structure. The cylindrical structure can not only create an internal channel that runs through both ends, but also adapt to the shape of the outer support 1000 to stably support it. Of course, those skilled in the art can also construct the inner support 2000 into other regular or irregular shapes based on various factors, which is not limited here.

[0075] Multiple unit splicing components 1100 can be spliced ​​together in various ways to form the outer support body 1000. For example, they can be spliced ​​together along a standard shaped trajectory such as a circular trajectory, or they can be spliced ​​together along an irregular trajectory. Since ensuring blood flow mainly relies on the internal channel that runs through both ends of the inner support body 2000, no matter how the multiple unit splicing components 1100 are spliced ​​together to form the outer support body 1000, as long as the splicing is completed and the outer support body 1000 is kept in the spliced ​​state 1000a, the internal channel that runs through both ends of the inner support body 2000 is not blocked, so that blood can flow in the internal channel, there is no limitation here.

[0076] In one embodiment, see [reference] Figure 1 and Figure 2 As shown, when the inner support 2000 adopts a cylindrical structure, the multiple unit splicing components 1100 of the outer support 1000 can be spliced ​​together around the inner support 2000 along the circumferential direction. Moreover, since the splicing state 1000a of the multiple unit splicing components 1100 forms a cylindrical structure, some or all of the multiple unit splicing components 1100 need to have a certain curvature so that the multiple unit splicing components 1100 can form a fitting splice around the inner support 2000 along the circumferential direction.

[0077] For example, see Figures 3 to 5 As shown, a portion of the multiple unit splicing components 1100 can be square splicing blocks, wherein the two sides of the square splicing block are mutually parallel splicing surfaces. (Continue reading...) Figures 6 to 8 As shown, another part of the multiple unit splicing components 1100 can be a fan-shaped splicing block. The two side surfaces of the fan-shaped splicing block are splicing surfaces with an angle between them. Therefore, when a square splicing block and a fan-shaped splicing block are connected sequentially along the circumferential direction of the inner support 2000, the splicing surfaces of adjacent square splicing blocks can form a matching contact with the splicing surfaces of the fan-shaped splicing blocks. With the help of the inclined surface formed by the splicing surfaces of the fan-shaped splicing blocks, multiple square splicing blocks and multiple fan-shaped splicing blocks can be connected sequentially along the circumferential direction of the inner support 2000 to form a matching cylindrical structure. There will be no gap between adjacent square splicing blocks and fan-shaped splicing blocks, forming a complete cylindrical structure.

[0078] The number of unit splicing components 1100 can be selected according to requirements. For example, the number of unit splicing components 1100 can vary, such as 6, 7, 8, 9, and 10. For instance, there can be 3, 4, or 5 square splicing blocks and 5 fan-shaped splicing blocks, respectively, without limitation. In addition, those skilled in the art can also use multiple unit splicing components 1100 entirely as fan-shaped splicing blocks, or use multiple unit splicing components 1100 as other blocks that can be spliced ​​to form a complete cylindrical structure, without limitation.

[0079] In one embodiment, the outer wall of the inner support 2000 can be pre-defined with multiple circumferentially distributed unit splicing areas. The installation positions of the unit splicing components 1100 on the outer wall of the inner support 2000 can be pre-determined within these unit splicing areas, ensuring that each unit splicing component 1100 of the outer support 1000 can be positioned and assembled with a corresponding unit splicing area on the inner support 2000. This facilitates the structural design of the inner and outer support 2000s and improves splicing efficiency and accuracy. Furthermore, a positioning component can be designed between the unit splicing components 1100 and the unit splicing areas. When multiple unit splicing components 1100 are spliced ​​on the outer wall of the inner support 2000, each unit splicing component 1100 and its corresponding unit splicing area can be quickly positioned and assembled using the positioning component.

[0080] The positioning component can take various forms, such as snap-fit, plug-in, or adhesive, to achieve rapid positioning and assembly between the unit splicing component 1100 and the corresponding unit splicing area. For example, in one embodiment, see [reference]. Figures 3 to 8 As shown, regardless of the type of unit splicing component 1100, such as a square splicing block or a fan-shaped splicing block, the unit splicing component 1100 can be provided with a positioning groove 1100a. Correspondingly, the inner support body 2000 can be provided with a matching positioning protrusion 2000a. Therefore, the positioning component can include a positioning groove 1100a located on the inner sidewall of the unit splicing component 1100 and a positioning protrusion 2000a located in the unit splicing area. The unit splicing component 1100 and the unit splicing area can achieve quick positioning and assembly through the insertion of the positioning groove 1100a and the positioning protrusion 2000a.

[0081] See Figures 9 to 11 As shown, where Figure 9 The direction towards the left is the distal end, and the direction towards the right is the proximal end; correspondingly, Figure 10 The distal end is oriented upwards, and the proximal end is oriented downwards. Therefore, in one embodiment, by means of... Figure 3 and Figure 4Taking the square splicing block shown in the image as an example (the same applies to the fan-shaped splicing block), the sidewall of the positioning groove 1100a facing the distal end can be defined as closed, while the sidewall of the positioning groove 1100a facing the proximal end can be defined as through. Due to the shape of this positioning groove 1100a, the positioning protrusion 2000a of the unit splicing component 1100 can be inserted into the positioning groove 1100a along the radial direction of the inner support body 2000, achieving rapid positioning and splicing. When multiple unit splicing components 1100 are spliced, as the inner support body 2000 moves towards the distal end, due to… The sidewalls of the positioning groove 1100a facing the distal end are closed, so the inner support 2000 can drive the outer support 1000 to move toward the distal end. When the inner support 2000 moves toward the proximal end, since the sidewalls of the positioning groove 1100a facing the proximal end are open, the movement of the inner support 2000 toward the proximal end is not restricted by the outer support 1000. Thus, it can detach from the outer support 1000 along the open sidewall. The resulting movement is that only the inner support 2000 is allowed to move toward the proximal end relative to the outer support 1000.

[0082] In addition, the positioning protrusion 2000a can also be located on the unit splicing component 1100, and the positioning groove 1100a can also be located on the inner support body 2000; no limitation is made here. Continuing according to... Figures 9 to 11 The direction shown in the text, that is Figure 9 The direction towards the left is the distal end, and the direction towards the right is the proximal end; correspondingly, Figure 10 The direction towards the upper side is the distal end, and the direction towards the lower side is the proximal end. Therefore, if the positioning groove 1100a is located on the inner support 2000, then the sidewall of the positioning groove 1100a facing the proximal end needs to be closed, while the sidewall of the positioning groove 1100a facing the distal end needs to be open. Correspondingly, the positioning protrusion 2000a can be located at the distal end of the unit splicing component 1100. When the inner support 2000 moves towards the distal end, it can drive the outer support 1000 to move towards the distal end. When the inner support 2000 moves towards the proximal end, its movement towards the proximal end is not restricted by the outer support 1000, and it can then detach from the outer support 1000 along the open sidewall. The resulting movement is such that only the inner support 2000 is allowed to move towards the proximal end relative to the outer support 1000. Those skilled in the art can choose a suitable structural design according to their needs, and there are no limitations on this.

[0083] Continue reading Figure 1 and Figure 2As shown, in one embodiment, the blocking device may further include a retaining sleeve 3000. The retaining sleeve 3000 is made of a deformable material, such as rubber, making it an elastic rubber sleeve. The retaining sleeve 3000 can be fitted onto the outside of the outer support 1000. When multiple unit splicing components 1100 of the outer support 1000 form a splicing state 1000a outside the inner support 2000, the retaining sleeve 3000, fitted onto the outside of the outer support 1000, can maintain the outer support 1000 in the splicing state 1000a. The retaining sleeve 3000 has a certain clamping force, which can make the overall structure of the outer support 1000 more stable. The retaining sleeve 3000 can be fixedly connected to at least one unit splicing component 1100 in the outer support 1000. When the unit splicing component 1100 is retracted, the retaining sleeve 3000 can also be retracted synchronously. Furthermore, the outer side wall of the unit splicing component 1100 can be provided with a limiting groove 1100b. After multiple unit splicing components 1100 form a splicing state 1000a, a continuous groove structure can be formed on the outside of the complete outer support body 1000, so that the groove structure formed by multiple limiting grooves 1100b can be used to accommodate the retaining sleeve 3000.

[0084] Continue reading Figure 1 and Figure 2 As shown, the blocking device also includes a delivery assembly 4000, which is connected to at least one of the outer support 1000 and the inner support 2000. The delivery assembly 4000 is configured to deliver or withdraw at least one of the outer support 1000 and the inner support 2000, to complete the delivery of the inner support 2000 and the outer support 1000 relative to the target position in the body, to maintain blood flow during the operation, to reduce the time of cessation of blood circulation to the lower limb organs during the operation, and to withdraw the inner support 2000 and the outer support 1000 after the operation, leaving no device in the body.

[0085] The delivery assembly 4000 can adopt various structures. In one embodiment, the delivery assembly 4000 includes a delivery component 4100, which is detachably connected to the inner support 2000. After the outer support 1000 and the inner support 2000 are assembled into state 1000a, the surgeon can connect the delivery component 4100 to the inner support 2000 and then manipulate the delivery component 4100 to deliver the inner support 2000 and the outer support 1000 to the target location in the body, namely the vascular overlap area 6000a between the artificial blood vessel 5000 and the autologous blood vessel 6000. Then, the surgeon can manipulate the delivery component 4100 to separate from the inner support 2000, retract the delivery component 4100, and leave the inner support 2000 and the outer support 1000 in the vascular overlap area 6000a between the artificial blood vessel 5000 and the autologous blood vessel 6000, using the internal channels in the inner support 2000 to maintain blood flow.

[0086] The conveying component 4100 and the inner support 2000 can be detachably connected in various ways, such as by snap-fit ​​or threaded connections, which is not limited here. In one embodiment, the conveying component 4100 may include a connecting end 4100a and a conveying rod 4100b, see reference. Figure 12 As shown, the connecting end 4100a can be provided with external threads, and the internal channel of the inner support body 2000 can be provided with internal threads. Therefore, the connecting end 4100a and the inner support body 2000 can be detachably connected by threads. The distal end of the delivery rod 4100b is connected to the connecting end 4100a, and the proximal end of the delivery rod 4100b is provided with a gripping end 4100c, such as a handle designed for easy gripping according to the surgeon's gripping habits. The delivery rod 4100b can be connected to the connecting end 4100a or the gripping end 4100c by adhesive bonding, injection molding, or threads, etc., which are not limited here.

[0087] The conveying assembly 4000 also includes a retraction component 4200, which is connected to at least one of the outer support 1000 and the inner support 2000. After the artificial blood vessel 5000 and the autologous blood vessel 6000 are anastomosed, the blood perfusion of the patient's lower limb organs is temporarily stopped. First, the inner support 2000 is withdrawn. Since the withdrawal of the inner support 2000 will cause the multiple unit splicing components 1100 of the outer support 1000 to lose their internal support, the entire multiple unit splicing components 1100 will collapse inward, causing the outer support 1000 to change from the spliced ​​state 1000a to the separated state 1000b. After the multiple unit splicing components 1100 collapse inward, the outer circumferential volume originally maintained by the outer support 1000 will become smaller. At this time, all unit splicing components 1100 are pulled out by the withdrawal component 4200. If there is a retaining sleeve 3000, it is also pulled out at the same time. In this way, the inner support 2000 and the outer support 1000 can be completely withdrawn without leaving any components.

[0088] The retraction component 4200 can take various forms. For example, as shown in Figure 2, the retraction component 4200 includes a first retraction thread 4200a, which is specifically used to connect with the unit splicing component 1100. The first retraction thread 4200a can be connected one-to-one with each unit splicing component 1100, allowing each unit splicing component 1100 to be retracted individually via the first retraction thread 4200a. Alternatively, a single first retraction thread 4200a can also be used to retract more than one unit splicing component 1100 simultaneously. This requires these unit splicing components 1100 to be pre-connected via thread connections or other methods, enabling both splicing state 1000a and separation state 1000b. Those skilled in the art can select the number of first retraction threads 4200a and the retraction method of the unit splicing components 1100 according to their needs; no limitations are imposed here. Referring again to Figure 2, the retraction component 4200 may further include a second retraction thread 4200b, which is specifically designed to connect with the inner support 2000 so that the inner support 2000 can be retracted by the second retraction thread 4200b. The second retraction thread 4200b may be one or more, which is not limited here.

[0089] The connection between the first retraction thread 4200a and the unit splicing component 1100, and the connection between the second retraction thread 4200b and the inner support 2000, can be a fixed connection or a detachable connection. For example, in one embodiment, see [continuing to refer to...] Figures 3 to 5As shown, the unit splicing component 1100 has a first threading channel 1100c that extends through both ends. The first retraction thread 4200a can pass through the first threading channel 1100c and is held in the first threading channel 1100c by tying a fixing knot. The opening area of ​​the distal end of the first threading channel 1100c can be larger than the opening area of ​​the proximal end of the first threading channel 1100c. For example, the first threading channel 1100c has a stepped structure from the distal end to the proximal end, which is used to hold the fixing knot of the first retraction thread 4200a. The first retraction thread 4200a and the second retraction thread 4200b can be distinguished by shape, material, color, or markings so that the surgeon can accurately retract the inner support 2000 or the outer support 1000.

[0090] Continue reading Figure 11 As shown, the inner support 2000 has a second threading channel 2000b that extends through both ends. The second retraction thread 4200b can pass through the second threading channel 2000b and is held in the second threading channel 2000b by tying a fixing knot. The opening area of ​​the distal channel of the second threading channel 2000b can be larger than the opening area of ​​the proximal channel. For example, the second threading channel 2000b has a stepped structure from the distal end to the proximal end, which is used to hold the fixing knot of the second retraction thread 4200b.

[0091] Continue reading 13 and Figure 14 As shown, this application provides an artificial blood vessel 5000 system. The artificial blood vessel 5000 system includes an artificial blood vessel 5000, which can be a stent artificial blood vessel 5000 or a multi-branch artificial blood vessel 5000. The multi-branch artificial blood vessel 5000 can also be single-branch, double-branch, or triple-branch, etc., without limitation. For example, the artificial blood vessel 5000 includes a main blood vessel 5100 and branch blood vessels 5200, with the branch blood vessels 5200 communicating with the side of the main blood vessel 5100. The artificial blood vessel 5000 also includes an infusion branch tube 5300, which is also communicating with the side of the main blood vessel 5100. The artificial blood vessel 5000 needs to be pre-connected to the autologous blood vessel 6000 in the body. The connection method is that the end segment of the artificial blood vessel 5000 and the end segment of the autologous blood vessel 6000 are interlocked. Therefore, a blood vessel overlap region 6000a will be formed between the artificial blood vessel 5000 and the autologous blood vessel 6000. The blood vessel overlap region 6000a formed here is also the anastomosis port position of the artificial blood vessel 5000 and the autologous blood vessel 6000.

[0092] The inner support 2000 and outer support 1000 of the blocking device can first be constructed in a spliced ​​state 1000a, and then delivered to the overlapping area 6000a between the artificial blood vessel 5000 and the autologous blood vessel 6000. At this point, refer to... Figures 13 to 18 As shown, the overlapping area 6000a of the artificial blood vessel 5000 and the autologous blood vessel 6000 is ligated and fixed to the outside of the external support 1000 using ligation sutures or bandages 6000b. During the operation, hemostatic forceps and other devices can be used to clamp and close the main blood vessel 5100 and various branch blood vessels 5200 of the artificial blood vessel 5000. Perfusion is only performed on the patient's lower limb organs through the perfusion branch tube 5300. During this process, the surgeon can perform the anastomosis connection between the artificial blood vessel 5000 and the autologous blood vessel 6000 without stopping the blood perfusion of the patient's lower limb organs. After the anastomosis between the artificial blood vessel 5000 and the autologous blood vessel 6000 is completed, the perfusion of the patient's lower limb organs can be temporarily stopped very briefly. First, the inner support 2000 is withdrawn. Since the withdrawal of the inner support 2000 will cause the multiple unit splicing components 1100 of the outer support 1000 to lose their internal support, the entire multiple unit splicing components 1100 will collapse inward, causing the outer support 1000 to change from the spliced ​​state 1000a to the separated state 1000b. After the multiple unit splicing components 1100 collapse inward, the outer circumference volume originally maintained by the outer support 1000 will become smaller. At this time, all unit splicing components 1100 are pulled out by the withdrawal component 4200. If there is a retaining sleeve 3000, it is also pulled out at the same time. In this way, the inner support 2000 and the outer support 1000 can be completely withdrawn without leaving any devices. The surgeon can then continue to perform the anastomosis operation of the remaining blood vessels. During this process, the surgeon can greatly reduce the time that blood circulation to the lower limb organs is stopped during the operation, thereby shortening the anastomosis time between the artificial blood vessel 5000 and the autologous blood vessel 6000, effectively reducing the impact on human health and lowering the difficulty and risk of the operation.

[0093] Therefore, it can be seen that during the anastomosis of the artificial blood vessel 5000 and the autologous blood vessel 6000, the occlusion device can help maintain perfusion of the patient's lower limb organs while performing the anastomosis, reducing the time when the patient's lower limb organs stop blood circulation. After the anastomosis is completed, the occlusion device can be completely withdrawn from the autologous blood vessel 6000, leaving no device inside, thus avoiding the uncertainty of long-term effects caused by leaving a device in the body. Moreover, the occlusion device can reduce its outer contour volume during withdrawal, avoiding the situation where the occlusion device is difficult or impossible to remove due to narrow anastomosis channels.

[0094] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0095] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A blocking device, characterized in that, The blocking device includes: An external support body, comprising multiple unit splicing components, wherein the external support body is assembled together by all the unit splicing components to form a cylindrical structure, the cylindrical structure having an assembly cavity that extends through both ends, and the external support body having a spliced ​​state in which all the unit splicing components are spliced ​​together, and a separated state in which all the unit splicing components are separated from each other; An inner support body has an internal channel that extends through both ends. The inner support body is used to assemble the outer support body in the assembly cavity to keep the outer support body in the spliced ​​state.

2. The blocking device according to claim 1, characterized in that, The outer wall of the inner support has multiple circumferentially distributed unit splicing areas, and each of the unit splicing components of the outer support is positioned and assembled with a corresponding unit splicing area on the inner support.

3. The blocking device according to claim 2, characterized in that, A positioning component is provided between the unit splicing component and the unit splicing area, and the unit splicing component and the unit splicing area are positioned and assembled by the positioning component.

4. The blocking device according to claim 3, characterized in that, The positioning component includes a positioning groove located on the inner sidewall of the unit splicing component, and a positioning protrusion located in the unit splicing area, wherein the positioning groove and the positioning protrusion are positioned and assembled.

5. The blocking device according to claim 4, characterized in that, The sidewalls of the positioning groove facing the distal end are closed, while the sidewalls of the positioning groove facing the proximal end are open, allowing only the inner support to move relative to the outer support in the proximal direction.

6. The blocking device according to claim 1, characterized in that, Some of the unit splicing components are square splicing blocks, and the other part of the unit splicing components are fan-shaped splicing blocks. All the square splicing blocks and all the fan-shaped splicing blocks are sequentially spaced and spliced ​​along the circumference to form the outer support body.

7. The blocking device according to claim 1, characterized in that, The blocking device includes: The retaining sleeve is made of a deformable material and is fitted onto the outside of the outer support body to keep the outer support body in the spliced ​​state.

8. The blocking device according to claim 7, characterized in that, The retaining sleeve is fixedly connected to at least one of the unit splicing components in the outer support; and / or The outer side wall of the unit splicing component has a limiting groove, which is used to accommodate the retaining sleeve.

9. The blocking device according to claim 1, characterized in that, The blocking device includes: A conveying assembly connected to at least one of the outer support and the inner support for conveying or retracting at least one of the outer support and the inner support.

10. The blocking device according to claim 9, characterized in that, The conveying assembly includes: A conveying component, said conveying component being detachably connected to said inner support; and / or, A retraction component, wherein the retraction component is connected to at least one of the outer support and the inner support.

11. The blocking device according to claim 10, characterized in that, The conveying component includes: A connecting end, which is threadedly connected to the inner support body; A conveying rod body, which is connected to the connecting end.

12. The blocking device according to claim 10, characterized in that, The retraction component includes: The first retraction thread is connected to the unit splicing component; and / or The second retraction thread is connected to the inner support body.

13. The blocking device according to claim 12, characterized in that, Each of the unit splicing components is provided with a first threading channel that extends through both ends. The opening area of ​​the far end of the first threading channel is larger than the opening area of ​​the near end of the first threading channel. The first threading channel is used to thread the first retraction thread. And / or, The inner support body has a second threading channel that runs through both ends. The opening area of ​​the far end of the second threading channel is larger than the opening area of ​​the near end of the second threading channel. The second threading channel is used to thread the second retraction thread.

14. An artificial blood vessel system, characterized in that, The artificial blood vessel system includes: An artificial blood vessel, comprising a main blood vessel and branch blood vessels, wherein the branch blood vessels are connected to the side of the main blood vessel; The blocking device according to any one of claims 1-13, wherein the blocking device is used to connect the main blood vessel and the autologous blood vessel.

15. The artificial blood vessel system according to claim 14, characterized in that, The artificial blood vessel also includes: A perfusion branch tube, wherein the perfusion branch tube is connected to the side of the main blood vessel; and / or, A ligating attachment is used to ligate and fix the overlapping area of ​​the artificial blood vessel and the autologous blood vessel to the outside of the outer support of the blocking device.

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