Artificial blood vessel

Abstract

The utility model belongs to the technical field of medical treatment, and particularly relates to an artificial blood vessel. The artificial blood vessel comprises an artificial blood vessel body, the two ends of the artificial blood vessel body are each provided with an anastomosis area, and the anastomosis areas are used for being sutured with a blood vessel to be sutured; a buffering bin is arranged at the position, away from the anastomosis area and the end of the artificial blood vessel, of the artificial blood vessel and used for buffering blood flow pulsating pressure after the artificial blood vessel and the blood vessel to be sutured are sutured. According to the artificial blood vessel, the buffer bins are located in the two side walls of the blood vessel, the buffer elements are arranged in the buffer bins, and the two ends of the buffer elements are fixedly connected with the inner wall of the artificial blood vessel. After the artificial blood vessel is transplanted, blood can generate impact when passing through the buffer bin, the buffer element absorbs and counteracts the impact force generated by blood flowing, the artificial blood vessel is prevented from being damaged by blood flow impact, and blood circulation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the medical technical field, and particularly relates to an artificial blood vessel. BACKGROUND

[0002] Cardiovascular disease is the main reason for global morbidity and mortality, according to the report of the World Health Organization, the world cardiovascular and cerebrovascular death accounts for 30.3% of the total death, only in China, "China Cardiovascular Health and Disease Report 2023" shows that there are about 330 million cardiovascular disease patients, and it shows a year-on-year increasing trend. At present, the most effective treatment method is blood vessel transplantation, however, due to the few sources of autologous blood vessels and the damage to the incision site, the autologous blood vessel transplantation is greatly limited in wide application, therefore, the artificial blood vessel becomes a substitute for many serious stenosis or occlusive blood vessels.

[0003] During the artificial blood vessel stent transplantation surgery of the traditional surgical operation, the doctor needs to stitch and connect the two ends of the artificial blood vessel, generally needs to stitch dozens to hundreds of needles, and simply stitching two anastomotic mouths needs more than ten minutes, the operation time is long, and repeated puncture can easily lead to tissue scar formation and compression of the artificial blood vessel. Meanwhile, a larger shear force is generated when the blood flow flows through the anastomotic mouth, which causes the vascular intima injury and intimal reactive hyperplasia. UTILITARY MODEL CONTENT

[0004] The utility model aims at providing an artificial blood vessel, to solve the problem that a larger shear force is generated when the blood flow flows through the anastomotic mouth in the prior art, which causes the vascular intima injury and intimal reactive hyperplasia.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] An artificial blood vessel, comprising an artificial blood vessel main body, one anastomotic area is arranged at each end of the artificial blood vessel main body, and the anastomotic area is used for stitching with a blood vessel to be stitched.

[0007] A buffer bin is arranged on the artificial blood vessel and located away from the anastomotic area and the end of the artificial blood vessel, and the buffer bin is used for buffering the blood flow pulsatile pressure after the artificial blood vessel and the blood vessel to be stitched are stitched.

[0008] As an optional scheme of the utility model, a stent fixing piece is connected at the anastomotic area, and the stent fixing piece is used for guiding the position of the artificial blood vessel in the blood vessel to be stitched during the stitching process of the artificial blood vessel.

[0009] As an optional scheme of the utility model, the support fixing piece comprises a plurality of expandable elastic rings arranged in sequence; the outer periphery of each expandable elastic ring is covered with a film, each expandable elastic ring is covered inside; and a pull wire winding the film for multiple turns is arranged on the film, the first end of the pull wire is connected to the film at a position away from the artificial blood vessel, and the second end of the pull wire is provided with a pull wire head located at a position close to the artificial blood vessel.

[0010] As an optional scheme of the utility model, one end of the film close to the artificial blood vessel is connected to the inner wall of the blood vessel in the anastomosis area of the artificial blood vessel.

[0011] As an optional scheme of the utility model, the edge of the expandable elastic ring is a wavy broken line or a wavy line shape.

[0012] As an optional scheme of the utility model, the buffer bin is arranged in the blood vessel wall of the artificial blood vessel, and the buffer bin is filled with elastic buffer elements.

[0013] As an optional scheme of the utility model, the buffer bin is adjacent to the anastomosis area and is located at a position away from the end of the anastomosis area of the artificial blood vessel.

[0014] As an optional scheme of the utility model, the shape of the buffer element is a wavy line shape.

[0015] As an optional scheme of the utility model, a plurality of wavy line-shaped buffer elements are connected to the two side walls of the cavity respectively at the wave crest and wave trough portions.

[0016] Compared with the prior art, the utility model has the beneficial effects as follows:

[0017] The artificial blood vessel of the utility model is characterized in that the buffer bin is arranged in the two side walls of the blood vessel, the buffer bin is internally provided with buffer elements, and the two ends of the buffer elements are fixedly connected to the inner wall of the artificial blood vessel.

[0018] The artificial blood vessel of the utility model is characterized in that the fixing device at both ends compresses the telescopic support through the film, adjusts the telescopic degree of the support through the pull wire, realizes the matching of the telescopic support at the anastomosis opening with the inner diameter of the blood vessel, realizes the angle adhesion of the artificial blood vessel and the autologous blood vessel, avoids the endometrial injury and endometrial hyperplasia caused by blood flow impact, and effectively reduces the blood vessel injury. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of the present application serve to provide further understanding of the present application, the illustrative embodiments of the present application and the explanations thereof serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0020] Figure 1 The overall structure diagram of the artificial blood vessel in the embodiment of the present application;

[0021] Figure 2 The structure diagram of the support fixing member in the embodiment of the present application;

[0022] Figure 3 The support ring structure schematic diagram of the artificial blood vessel in the embodiment of the present application is made of polyurethane wire winding outside;

[0023] Figure 4 The pulling schematic diagram of the support fixing member in the embodiment of the present application;

[0024] Figure 5 The buffer bin structure schematic diagram in the embodiment of the present application;

[0025] Wherein: 1 artificial blood vessel main body; 2 anastomosis area; 3 buffer bin; 31 buffer element; 4 support fixing member; 41 expandable elastic ring; 5 pull line head; 6 film covering. DETAILED DESCRIPTION

[0026] The present application will be described in detail below with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0027] The following detailed description is exemplary description, which aims to provide further detailed description of the present application. Unless otherwise specified, all technical terms used in the present application have the same meaning as that generally understood by the general technical personnel in the field to which the present application belongs. The terms used in the present application are only for the description of the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application.

[0028] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more than two. In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] In order to solve the problems in the background art, the present scheme provides an artificial blood vessel which can be quickly connected with blood vessels and has a stent support at the anastomotic port, so as to effectively reduce the stenosis at the anastomotic port.

[0031] As shown in Figures 1-5 An artificial blood vessel, comprising an artificial blood vessel body 1, an anastomosis area 2 is arranged at each end of the artificial blood vessel body 1, and the anastomosis area 2 is used for suturing with a blood vessel to be sutured, a buffer bin 3 is arranged on the artificial blood vessel at a position away from the anastomosis area 2 and the end of the artificial blood vessel, and the buffer bin 3 is used for buffering the pulsatile pressure of blood flow after the artificial blood vessel and the blood vessel to be sutured are sutured.

[0032] Specifically, the anastomosis area 2 is a part of the artificial blood vessel and belongs to the end position of the artificial blood vessel.

[0033] In the preferred scheme, a stent fixing member 4 is further connected at the anastomosis area 2, the stent fixing member 4 is used for guiding and positioning the position of the artificial blood vessel in the blood vessel to be sutured during the suturing process of the artificial blood vessel;

[0034] Specifically, the stent fixing member 4 comprises a plurality of expandable elastic rings 41 arranged in sequence, and each expandable elastic ring 41 can be coaxially arranged, a film 6 is arranged on the outer periphery of each expandable elastic ring 41 to cover each expandable elastic ring 41, and a pull wire is arranged on the film 6 and winds around the film 6 for multiple turns, the first end of the pull wire is connected to the film 6 at a position close to the artificial blood vessel, the pull wire is wound on the film 6 in a spiral manner from the starting point of the pull wire to the other end of the film 6, after winding to the other end of the film 6, the pull wire is drawn out from the other end of the film 6 along a straight line from the starting point of the pull wire on the film 6 to form a pull wire head 5, and the pull wire head 5 is located at a position close to the artificial blood vessel.

[0035] Specifically, the covering film 6 is connected to the inner wall of the blood vessel in the anastomosis area 2 of the artificial blood vessel, and a region for suturing is reserved. When suturing of the artificial blood vessel is needed, the pull line head 5 is pulled, at which time the pull line arranged on the covering film 6 is tightened, and the expandable elastic ring 41 is compressed. After the diameter of the support fixing member is reduced, the support fixing member is inserted into the blood vessel to be sutured, and after the pull line is loosened, the expandable elastic ring 41 automatically expands and is supported on the inner wall of the blood vessel, at which time the anastomosis area 2 is sutured with the blood vessel.

[0036] Optionally, a channel for winding and pulling the pull line is arranged on the covering film 6.

[0037] The channel can be a fine hole channel arranged in the covering film 6, and the fine hole channel is between the outer wall and the inner wall of the covering film 6, similar to a sandwich.

[0038] Specifically, the centers of the expandable elastic rings 41 are on the same straight line, and the planes on which the expandable elastic rings 41 are arranged are parallel to each other.

[0039] Optionally, the edges of the expandable elastic ring 41 are in the shape of a vertical wavy fold line or a wavy line. The wavy undulations are in the vertical direction. With such a structure, the expandable elastic ring 41 can be compressed and the diameter of the expandable elastic ring 41 can be reduced by pulling the pull line after the covering film 6.

[0040] Optionally, the buffer compartment 3 is arranged in the blood vessel wall of the artificial blood vessel, and the buffer compartment 3 is filled with elastic buffer elements 31. The buffer compartment 3 is adjacent to the anastomosis area 2 and is located at a position away from the end of the anastomosis area 2 of the artificial blood vessel.

[0041] As an example, the buffer compartment 3 is arranged in the blood vessel wall of the artificial blood vessel and is a ring-shaped cavity, and the ring-shaped cavity is filled with elastic buffer elements 31.

[0042] Optionally, the buffer compartment 3 is adjacent to the anastomosis area 2 and is located at a position away from the end of the anastomosis area 2 of the artificial blood vessel.

[0043] Optionally, the buffer elements 31 are in the shape of a wavy line. A plurality of wavy line-shaped buffer elements 31 are connected to the two side walls of the cavity, respectively.

[0044] Optionally, the buffer compartment 3 is a ring-shaped cavity, and the wavy-shaped buffer elements 31 are arranged in the cavity.

[0045] For example, the buffer element 31 can be wavy, with multiple wavy buffer elements 31, the crests and troughs of which are connected to the two side walls of the cavity. The cavity itself can provide some cushioning, and with the addition of the filling elastic element, the cushioning effect can be further improved.

[0046] The artificial blood vessel provided by this utility model has a membrane 6 at both ends of the stent that can fully fit with the autologous blood vessel after implantation, reducing blood flow instability caused by different connection angles, reducing turbulence during blood flow, reducing the probability of thrombosis, and ensuring long-term patency and anti-stenosis effect in the anastomosis area after implantation.

[0047] In the above approach, a stent is prepared near the anastomosis site to ensure a neat and flat anastomosis between the artificial and autologous blood vessels, reducing blood turbulence. The stent features an adjustable design to adapt to different vascular transplantation environments and facilitates surgical procedures.

[0048] In the optional solution, the stent fixation component includes a retractable tubular stent and a covering membrane 6 encapsulation structure covering it; wherein the connection between the artificial blood vessel part and the two fixation devices is the stent area and the anastomosis area 2 of the artificial blood vessel.

[0049] Figure 1 The first and second retractable stents are in a compressed state of the membrane 6, and the diameter of the membrane 6 gradually decreases at the end furthest from the artificial blood vessel, with the diameter at the farthest end reaching 0.5 to 0.8 times the diameter of the artificial blood vessel.

[0050] In an alternative embodiment, the diameters of the various expandable elastic coils 41 can be different, for example, such as Figure 2 As shown, a, b, and c illustrate the expansion and contraction states of the expandable tubular stent: the closer it is to the artificial blood vessel, the closer its diameter is to the artificial blood vessel's diameter. At its furthest point, the diameter of the expandable stent can reach 1.25-1.5 times the diameter of the artificial blood vessel. Region d represents the stent portion within the artificial blood vessel, where the diameter of the tubular stent is slightly smaller than the inner diameter of the artificial blood vessel; region e represents the anastomosis area, such as... Figure 3 As shown, the artificial blood vessel portion in this area has a support ring structure made of polyurethane filaments on its outer side, which can ensure that the artificial blood vessel will not deform during the suturing process, reducing suturing operations and suturing time.

[0051] The telescopic support is wrapped and compressed by a covering film 6. The surface of the covering film 6 has 3-5 evenly distributed adjustment rings formed by pull lines. The size of different adjustment rings can be adjusted by pulling the pull lines, thereby adjusting the diameter of the telescopic tubular support. Figure 4 As shown, by pulling the tensioning wire, the diameter of the adjustment ring at the farthest point of the membrane 6 structure changes the most, and the diameter of the telescopic tubular support is compressed to the greatest extent; the diameter of the adjustment ring gradually decreases from the outside to the inside, and the diameter of the membrane 6 near the innermost adjustment ring hardly changes.

[0052] The artificial blood vessel has a buffer bin 3 structure in the anastomosis area 2 domain, as shown in the drawings Figure 5 The buffer bin 3 is located in the two side walls of the blood vessel, and the buffer bin 3 is internally provided with a buffer element 31, and the two ends of the buffer element 31 are fixedly connected with the inner wall of the artificial blood vessel. After the artificial blood vessel is transplanted, the blood passing through the buffer bin 3 will produce an impact, and the buffer element 31 will absorb and offset the impact force generated by the blood flow, so as to avoid the damage of the blood flow impact to the artificial blood vessel, and facilitate the blood circulation.

[0053] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] From the technical common sense, the present application can be realized by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments, in terms of various aspects, are only illustrative, and not the only. All changes within the scope of the present application or within the scope equivalent to the present application are included in the present application.

Claims

1. An artificial blood vessel, characterized by, The artificial blood vessel body (1) is provided with anastomosis area (2) at both ends, which is used for suturing with the blood vessel to be sutured. The artificial blood vessel is provided with buffer bin (3) at the position away from the anastomosis area (2) and the end of the artificial blood vessel, which is used for buffering the pulsatile pressure of blood flow after the artificial blood vessel and the blood vessel to be sutured are sutured.

2. The artificial blood vessel according to claim 1, characterized by The anastomosis area (2) is connected with a stent fixing member (4), which is used for guiding the position of the artificial blood vessel in the blood vessel to be sutured during the suturing process of the artificial blood vessel.

3. The artificial blood vessel according to claim 2, characterized by The stent fixing member (4) comprises a plurality of expandable elastic rings (41) arranged in sequence; the outer periphery of each expandable elastic ring (41) is covered with a film (6), and each expandable elastic ring (41) is covered inside; and a pull wire is arranged on the film (6) and winds around the film (6) for multiple turns, the first end of the pull wire is connected to the film (6) at a position away from the artificial blood vessel, and the second end of the pull wire is provided with a pull wire head (5) located at a position close to the artificial blood vessel.

4. The artificial blood vessel according to claim 3, characterized by One end of the film (6) close to the artificial blood vessel is connected with the inner wall of the blood vessel in the anastomosis area (2) of the artificial blood vessel.

5. The artificial blood vessel according to claim 3, characterized by The side of the expandable elastic ring (41) is a wavy broken line or a wavy line shape.

6. The artificial blood vessel according to claim 1, wherein The buffer bin (3) is arranged in the blood vessel wall of the artificial blood vessel, and the buffer bin (3) is filled with elastic buffer elements (31).

7. The artificial blood vessel according to claim 1, wherein The buffer bin (3) is adjacent to the anastomosis area (2) and is located at a position away from the end of the artificial blood vessel.

8. The artificial blood vessel according to claim 6, characterized by The shape of the buffer element (31) is a wavy line shape.

9. The artificial blood vessel according to claim 8, characterized by A plurality of wavy line shaped buffer elements (31), the wave crest and wave trough parts are connected with the two side walls of the cavity respectively.

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