Artificial blood vessel suture-free bridge

Abstract

The utility model discloses an artificial blood vessel suture-free bridge which comprises a supporting cylinder, the supporting cylinder comprises a first supporting cylinder and a second supporting cylinder, one end of the first supporting cylinder is provided with a first counter bore, and one end of the second supporting cylinder is provided with a second counter bore; the pressing ring comprises a first pressing ring and a second pressing ring, the first pressing ring is movably pressed into the first counter bore, and the second pressing ring is movably pressed into the second counter bore; a first eversion section is arranged at one end of the artificial blood vessel, a second eversion section is arranged at the other end of the artificial blood vessel, the first eversion section penetrates through the first pressing ring and the first supporting cylinder, and the second eversion section penetrates through the second pressing ring and the second supporting cylinder; the first outwards-turned section extends and penetrates through the first supporting cylinder and then is turned from inside to outside to sleeve the outer circumferential surface of the supporting cylinder, and then the first outwards-turned section is extruded by a first pressing ring to be fixed in the first counter bore; the second outward turning section extends and penetrates through the second supporting cylinder and then is turned from inside to outside to be arranged on the outer circumferential face of the second supporting cylinder in a sleeving mode, and then the second outward turning section is extruded by a second pressing ring to be fixed into the second counter bore.

Description

Technical Field

[0001] This utility model relates to a sutureless bridging device for artificial blood vessels. Background Technology

[0002] Currently, the Sun's procedure has become the standard treatment for aortic dissections involving the aortic arch. During the procedure, under cardiopulmonary bypass and with the aorta stopped, the ascending aorta and its root are first treated. Then, deep hypothermia and circulatory arrest are performed, and a covered elephant trunk stent is implanted and released into the true lumen of the descending aorta. This completes the anastomosis between the distal end of the four-branch aortic arch prosthesis and the proximal end of the elephant trunk stent prosthesis, as well as the autologous descending aorta. The procedure requires anastomosis of both the proximal and distal portions. The distal aortic arch anastomosis is deep, anatomically complex, and has a thin adventitia, making the anastomosis prone to bleeding.

[0003] Furthermore, cardiovascular surgeons not only need to restore the anatomical structure of the heart's blood vessels in the shortest possible time, but also immediately restore their physiological function; there is no time to wait for the blood vessels to heal completely before starting work. Therefore, after restoring circulation, the corresponding branches of the brachiocephalic artery, left common carotid artery, and left subclavian artery on the artificial blood vessel are anastomosed one by one. As can be seen, there are many anastomoses. The replaced artificial blood vessel needs to be sutured to the aorta, which can easily cause tearing of the aortic intima and epithelium and bleeding at the suture sites, consuming a lot of time. Therefore, to address the shortcomings of existing technologies, a sutureless artificial blood vessel bridging device has been developed. Utility Model Content

[0004] The purpose of this invention is to address the deficiencies of existing technologies by providing a sutureless artificial blood vessel bridging device.

[0005] In order to achieve the above-mentioned objectives of this utility model, the following technical solution is adopted:

[0006] A sutureless artificial blood vessel bridging device includes a support cylinder comprising a first support cylinder and a second support cylinder, wherein one end of the first support cylinder has a first countersunk hole and one end of the second support cylinder has a second countersunk hole; a pressure ring comprising a first pressure ring and a second pressure ring, wherein the first pressure ring is movably pressed into the first countersunk hole and the second pressure ring is movably pressed into the second countersunk hole; and an artificial blood vessel, wherein one end of the artificial blood vessel has a first eversion section and the other end has a second eversion section, wherein the first eversion section passes through the first pressure ring and the first support cylinder, and the second eversion section passes through the second pressure ring and the second support cylinder; wherein the first eversion section extends through the first support cylinder and then everts onto the outer circumferential surface of the support cylinder from the inside out, and is then fixed in the first countersunk hole by the first pressure ring; the second eversion section extends through the second support cylinder and then everts onto the outer circumferential surface of the second support cylinder from the inside out, and is then fixed in the second countersunk hole by the second pressure ring.

[0007] As a further improvement to the technical solution, the present invention provides a sutureless artificial blood vessel bridging device, which further includes a first conical cylinder and a first covering layer. Both the first support cylinder and the second support cylinder are provided with a first conical cylinder that extends outward and narrows in diameter. The first covering layer wraps around and covers the outer side of the first conical cylinder.

[0008] As a further improvement to the technical solution, the present invention provides a sutureless artificial blood vessel bridging device, which further includes a second conical cylinder and a second covering layer. Both the first pressure ring and the second pressure ring are provided with a second conical cylinder that extends outward and has a reduced diameter. The second covering layer wraps around and covers the outer side of the second conical cylinder.

[0009] As a further improvement to the technical solution, a circumferential shoulder is formed at the connection between the first pressure ring, the second pressure ring and the second conical cylinder.

[0010] As a further improvement to the technical solution, the shoulder serves as a binding point.

[0011] As a further improvement to the technical solution, the artificial blood vessel, the first covering layer, and the second covering layer are all made of polyester, polytetrafluoroethylene, or polyurethane.

[0012] As a further improvement to the technical solution, the support cylinder, pressure ring, first conical cylinder, and second conical cylinder are all made of polyetheretherketone; or, the support cylinder, pressure ring, first covering layer, and second covering layer are all made of titanium plate.

[0013] As a further improvement to the technical solution, the titanium plate is provided with multiple mesh holes.

[0014] As a further improvement to the technical solution, the diameter of the artificial blood vessel is...

[0015] As a further improvement to the technical solution, the diameter of the support cylinder is... Its length is 20-40mm.

[0016] The present invention represents a significant advancement over the prior art:

[0017] 1. The support cylinder of this utility model enhances the strength of the bridging point between the artificial blood vessel and the large blood vessel. When compressed at this point, the support cylinder prevents the artificial blood vessel from collapsing due to its support. This facilitates the insertion of one end of the artificial blood vessel, which is wrapped with the support cylinder, into the blood vessel, achieving vascular bridging between the artificial blood vessel and human tissue. The artificial blood vessel is then secured to the blood vessel using ligation sutures, thus eliminating the need for sutures. Therefore, it avoids the damage to the inner and outer membranes of blood vessels caused by sutures and needle holes, as well as bleeding due to anastomosis techniques, which are common in traditional surgery. It also shortens the time of extracorporeal circulation, effectively protecting the function of all organs. Furthermore, it avoids serious complications caused by hypothermic circulatory arrest, significantly reducing surgical time, effectively protecting the function of all organs, improving the survival rate, and reducing the need for blood transfusions.

[0018] 2. The titanium plate of this utility model is made of titanium or titanium alloy. Titanium is similar to human bone and has good biocompatibility with human tissues, with no toxic side effects. Titanium is lightweight, has a low elastic modulus, is non-magnetic, non-toxic, corrosion-resistant, high-strength, and tough.

[0019] 3. The support cylinder and pressure ring of this utility model can also be made of polyetheretherketone (PEEK). PEEK is a semi-crystalline thermoplastic polymer, a special engineering plastic with excellent properties such as high temperature resistance, self-lubrication, easy processing, and high mechanical strength. PEEK has excellent mechanical properties, such as high strength, high modulus, and high toughness, while also having excellent thermal stability and chemical inertness, and good biocompatibility.

[0020] 4. In this utility model, a shoulder is formed at the connection between the pressure ring and the second conical cylinder. The shoulder can serve as a binding point and can also prevent the blood vessel from pulling the binding line towards the support cylinder, which can facilitate better binding and fixation of the artificial blood vessel and the aorta.

[0021] 5. In this utility model, the outward-facing section is pressed into the countersunk hole of the support cylinder by a pressure ring, thereby fixing the outward-facing section while... Artificial blood The tube wraps around the support cylinder to prevent it from slipping out of the artificial blood vessel.

[0022] 6. The diameter of the artificial blood vessel of this utility model is... This can help expand the application range of artificial blood vessels; the diameter of the support tube is... It can be easily used with artificial blood vessels, and the length of the support tube is 20-40mm, which can be adapted to support different parts. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 This is a schematic diagram of the structure of a sutureless artificial blood vessel bridging device according to the present invention;

[0025] Figure 2 This is a schematic diagram of the artificial blood vessel through-support cylinder and pressure ring in this utility model;

[0026] Figure 3 This is a schematic diagram of the unfolded structure of the first support cylinder and the first pressure ring in this utility model;

[0027] Figure 4 This is a schematic diagram of the unfolded structure of the second support cylinder and the second pressure ring in this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the present invention, in which the first support cylinder is fitted with a first conical cylinder and the first pressure ring is fitted with a second conical cylinder;

[0029] Figure 6 This is a schematic diagram of the structure of the present invention, in which the second support cylinder is fitted with the first conical cylinder and the second pressure ring is fitted with the second conical cylinder;

[0030] Figure 7 This is a schematic diagram of one structure of the support cylinder in this utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the artificial blood vessel with branched blood vessels in this utility model;

[0032] Figure 9 This is a schematic diagram of a structure in which an artificial blood vessel is everted and fitted onto a support cylinder in this utility model;

[0033] The names and serial numbers of each component in the diagram are as follows:

[0034] 1-Artificial blood vessel, 101-First eversion segment, 102-Second eversion segment, 2-First pressure ring, 3-First support cylinder, 31-First countersunk hole, 311-Bottom surface, 4-Second conical cylinder, 5-Second covering layer, 6-First covering layer, 7-First conical cylinder, 800-Shoulder, 9-Branch blood vessel, 10-Second pressure ring, 11-Second support cylinder, 111-Second countersunk hole. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments in this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0036] Example 1:

[0037] like Figure 1-9 As shown, this embodiment is a sutureless artificial blood vessel bridging device, including a support cylinder, a pressure ring, and a human... Work blood Tube 1. The support cylinder includes a first support cylinder 3 and a second support cylinder 11. One end of the first support cylinder 3 has a first countersunk hole 31, and one end of the second support cylinder 11 has a second countersunk hole 111. The pressure ring includes a first pressure ring 2 and a second pressure ring 10. The first pressure ring 2 is movably pressed into the first countersunk hole 31, and the second pressure ring 10 is movably pressed into the second countersunk hole 111. One end of the artificial blood vessel 1 has a first eversion section 101, and the other end has a second eversion section 102. The first eversion section 101 passes through the first pressure ring 2 and the first support cylinder 3, and the second eversion section 102 passes through the second pressure ring 10 and the second support cylinder 11. The first eversion section 101 extends through the first support cylinder 3 and then everts from the inside out onto the outer circumference of the support cylinder 3. Subsequently, the first pressure ring 2 presses the first eversion section 101 to fix it in the first countersunk hole 31. The second outward-turned section 102 extends through the second support cylinder 11 and then turns outward from the inside to fit onto the outer circumference of the second support cylinder 11. Subsequently, the second pressure ring 10 presses the second outward-turned section 102 to fix it in the second countersunk hole 11.

[0038] like Figure 8 As shown, the artificial blood vessel can be the abdominal aorta, ascending aorta, aortic arch, or descending thoracic aorta. When the artificial blood vessel is the ascending aorta or aortic arch, it can have branch vessels 9. The branch vessels can be divided into a first branch vessel, a second branch vessel, a third branch vessel, and a fourth branch vessel.

[0039] Example 2:

[0040] Compared with Embodiment 1, the difference is that a first conical cylinder 7 and a first covering layer 6 are added. Both the first support cylinder 3 and the second support cylinder 11 are provided with a first conical cylinder 7 that extends outward and has a narrowed diameter, and the first covering layer 6 wraps around and covers the outer side of the first conical cylinder 7.

[0041] The first support cylinder 3 and the second support cylinder 11 can be quickly inserted into the blood vessel through the first conical cylinder 7, achieving rapid bridging with the blood vessel.

[0042] The first covering layer covers the outer surface of the first conical tube and prevents blood vessels from coming into contact with the first conical tube.

[0043] Example 3:

[0044] Compared with Embodiment 1 or 2, the difference is that a second conical cylinder 4 and a second covering layer 5 are added. Both the first pressure ring 2 and the second pressure ring 10 are provided with a second conical cylinder 4 that extends outward and has a reduced diameter, and the second covering layer 5 wraps around and covers the outer side of the second conical cylinder 4.

[0045] Both the first pressure ring 2 and the second pressure ring 10 are provided with a second conical cylinder 4 that extends outward and narrows in diameter. The second conical cylinder can facilitate the contraction of the blood vessel after it is fitted into the support cylinder, and can facilitate the binding and fixation of the blood vessel to the artificial blood vessel.

[0046] The second covering layer can prevent blood vessels from coming into contact with the second conical tube.

[0047] Example 4:

[0048] The difference compared to any one of Examples 1-3 is as follows:

[0049] The first pressure ring 2, the second pressure ring 10, and the second conical cylinder 4 all form a circumferential shoulder 800 at their connection points. The shoulder 800 serves as a binding point. The diameter of the largest end of the second conical cylinder is smaller than the outer diameter of the pressure ring, causing the pressure ring and the second conical cylinder to form a [missing information - likely a specific shape or feature] at the connection point. The height difference creates a shoulder. Therefore, the end face of the pressure ring and the outer circumference of the second conical cylinder form a space for accommodating it. When tying The ligating suture securely connects the blood vessel to the second conical cylinder, and the shoulder prevents the blood vessel from pulling the ligating suture towards the support cylinder. This facilitates the secure installation of the ligating suture between the pressure ring and the second conical cylinder.

[0050] Example 5:

[0051] Compared with any one of Examples 1-4, the difference is that the material structure of the artificial blood vessel, the first covering layer, and the second covering layer is given.

[0052] The first material structure: The artificial blood vessel 1, the first covering layer 6, and the second covering layer 5 are all made of polyester. Polyester has the following advantages: 1. Excellent mechanical properties: Polyester artificial blood vessels possess excellent mechanical properties, such as high strength, high stiffness, and low expansion rate, allowing them to better withstand the pressure of blood flow. 2. Good biocompatibility: Polyester artificial blood vessels have good biocompatibility, do not cause immune reactions or thrombosis, and can better integrate with human tissues. 3. High customization: Polyester artificial blood vessels can be customized through different production processes, allowing for personalized designs based on different disease conditions, better adapting to diverse clinical needs.

[0053] The second material structure: The artificial blood vessel 1, the first covering layer 6, and the second covering layer 5 are all made of polytetrafluoroethylene (PTFE). PTFE has excellent chemical stability, corrosion resistance, and wear resistance. At the same time, the surface of PTFE material is smooth, resulting in lower adhesion and a lower risk of thrombosis.

[0054] The third material structure: The artificial blood vessel 1, the first covering layer 6, and the second covering layer 5 are all made of polyurethane (PU). Polyurethane has the following advantages: 1. Good biocompatibility: PU artificial blood vessel material has good compatibility with human tissue and is less likely to cause rejection reactions. 2. Corrosion resistance: PU artificial blood vessels are not easily corroded by chemicals in the blood and can maintain stable performance over a long period. 3. Fatigue resistance: PU artificial blood vessels have a certain degree of elasticity, can withstand the impact and pulsation of blood, and are not easily fatigued or damaged. 4. A certain degree of elasticity: The elasticity of PU artificial blood vessels is similar to that of natural human blood vessels, and can adapt to the complex environment inside the human body.

[0055] Example 6:

[0056] Compared with any one of Examples 1-5, the difference is that the material structure of the support cylinder, the pressure ring, the first conical cylinder, and the second conical cylinder is given.

[0057] The first material structure: the support cylinder, pressure ring, first conical cylinder 7, and second conical cylinder 4 are all made of polyetheretherketone (PEEK). PEEK is a semi-crystalline thermoplastic polymer, a special engineering plastic with excellent properties such as high temperature resistance, self-lubrication, easy processing, and high mechanical strength. PEEK possesses excellent mechanical properties, such as high strength, high modulus, and high toughness, while also exhibiting excellent thermal stability and chemical inertness, and good biocompatibility.

[0058] The second material structure: The support cylinder, pressure ring, first conical cylinder 7, and second conical cylinder 4 are all made of titanium plates. The titanium plates have multiple mesh openings. The titanium plates are made of titanium or titanium alloy. Titanium is similar to human bone and has good biocompatibility with human tissues. It is soluble and has no toxic side effects. Titanium is lightweight, has a low elastic modulus, is non-magnetic, non-toxic, corrosion-resistant, high-strength, and tough. Features such as good quality.

[0059] Example 7:

[0060] The difference from any of Examples 1-6 is that the specifications of the artificial blood vessel are given. The diameter of the artificial blood vessel is... Commonly used diameters include or wait.

[0061] Example 8:

[0062] The difference compared to any of Examples 1-7 is that the structure of the support cylinder is given.

[0063] The diameter of the support cylinder is Commonly used diameters can be: or wait.

[0064] The length of the support cylinder is 20-40mm. Commonly used lengths are 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39 or 40mm, etc.

[0065] According to the above embodiments, the working principle of this utility model is as follows:

[0066] A support cylinder and a pressure ring are fitted onto the artificial blood vessel 1. The artificial blood vessel 1 has a first eversion section 101 and a second eversion section 102 at each end. Both the first eversion section 101 and the second eversion section 102 are everted inwards and outwards to wrap around their corresponding support cylinders. Specifically, the first eversion section 101 is everted and fitted onto the first support cylinder 3, and is pressed into the first countersunk hole 31 by the first pressure ring 2 for fixation; the second eversion section 102 is everted and fitted onto the second support cylinder 11, and is pressed into the second countersunk hole 111 by the second pressure ring 10 for fixation. The first and second support cylinders increase the strength of the artificial blood vessel 1 and improve its resistance to compression. When compressed at both ends of the artificial blood vessel, the support cylinders prevent it from collapsing; thus, it is easy to insert one end of the artificial blood vessel, which is wrapped with the support cylinder, into the blood vessel, achieving a vascular bridging between the artificial blood vessel and human tissue. The artificial blood vessel 2 is then ligated and fixed to the blood vessel using ligation sutures, thus achieving sutureless connection. Therefore, it avoids the rupture of the intima and endothelium of blood vessels caused by sutures and needle holes, as well as bleeding due to anastomosis techniques, which are common in traditional surgery. It also shortens the time of cardiopulmonary bypass, effectively protecting the function of the whole body organs. Furthermore, it avoids serious complications caused by deep hypothermic circulatory arrest, greatly shortens the operation time, effectively protects the function of the whole body organs, improves the survival rate, and reduces the need for blood transfusions.

[0067] When artificial blood vessel 2 is used to replace the diseased ascending aorta or aortic arch, the first branch is anastomosed with the brachiocephalic artery, the second branch with the left internal jugular vein, the third branch with the left subclavian artery, and the fourth branch is used for perfusion or degassing. One end of the artificial blood vessel, wrapped with a support tube, is implanted into the aortic lumen and ligated at the corresponding site on the aortic adventitia, quickly completing the artificial blood vessel replacement. This achieves bridging between the artificial blood vessel and the aortic vessel; avoids suture-induced tearing of the aortic adventitia and endothelium, bleeding from suture sites, and bleeding due to anastomotic technique; shortens the time of cardiopulmonary bypass; avoids the serious complications caused by traditional deep hypothermia and circulatory arrest; effectively protects the function of all organs; and greatly reduces the cost of treating complications.

[0068] This invention utilizes an artificial blood vessel wrapped around a support tube inserted into the aorta. The artificial blood vessel isolates the support tube from the blood in the aorta, preventing direct contact between the support tube and the blood. Furthermore, a ligation suture is used at the insertion point to bind and fix the aorta and the artificial blood vessel, achieving a bridge between the artificial blood vessel and the aorta, avoiding sutures and thus achieving an anastomosis-free connection. The support tube expands the artificial blood vessel, facilitating smooth blood flow at the bridge between the artificial blood vessel and the aorta, overcoming the problem of blood blockage during suturing of the artificial blood vessel and the aorta, and also avoiding bleeding from the suture needle holes.

[0069] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A sutureless vascular graft bridge, comprising: Comprising A support cylinder comprising a first support cylinder (3) and a second support cylinder (11), one end of the first support cylinder (3) is provided with a first counterbore (31), one end of the second support cylinder (11) is provided with a second counterbore (111); A compression ring comprising a first compression ring (2) and a second compression ring (10), the first compression ring (2) is pressed into the first counterbore (31), and the second compression ring (10) is pressed into the second counterbore (111); and An artificial blood vessel (1) is provided with a first everted segment (101) at one end and a second everted segment (102) at the other end, the first everted segment (101) penetrates the first compression ring (2) and the first support cylinder (3), and the second everted segment (102) penetrates the second compression ring (10) and the second support cylinder (11); Wherein, the first everted segment (101) extends through the first support cylinder (3) and is then wrapped on the outer circumferential surface of the first support cylinder (3) from inside to outside, and then the first everted segment (101) is fixed in the first counterbore (31) by extruding with the first compression ring (2); The second everted segment (102) extends through the second support cylinder (11) and is then wrapped on the outer circumferential surface of the second support cylinder (11) from inside to outside, and then the second everted segment (102) is fixed in the second counterbore (111) by extruding with the second compression ring (10).

2. The sutureless vascular graft bridge of claim 1, wherein: It also comprises a first tapered cylinder (7) and a first covering layer (6), the first support cylinder (3) and the second support cylinder (11) are both provided with a first tapered cylinder (7) extending outwardly and reducing in diameter, and the first covering layer (6) is wrapped on the outer side of the first tapered cylinder (7).

3. The sutureless vascular graft bridge of claim 1, wherein: It also comprises a second tapered cylinder (4) and a second covering layer (5), the first compression ring (2) and the second compression ring (10) are both provided with a second tapered cylinder (4) extending outwardly and reducing in diameter, and the second covering layer (5) is wrapped on the outer side of the second tapered cylinder (4).

4. The sutureless vascular graft bridge of claim 3, wherein: The connection between the first compression ring (2), the second compression ring (10) and the second tapered cylinder (4) forms a circumferential shoulder (800).

5. The sutureless vascular graft bridge of claim 4, wherein: The shoulder (800) serves as a binding point.

6. The vascular prosthesis according to any one of claims 1 to 5, wherein: The artificial blood vessel (1), the first covering layer (6) and the second covering layer (5) are all made of any one of polyester, polytetrafluoroethylene or polyurethane.

7. The vascular prosthesis according to any one of claims 1 to 5, wherein: The support cylinder, the compression ring, the first tapered cylinder (7) and the second tapered cylinder (4) are all made of polyether ether ketone; or, the support cylinder, the compression ring, the first tapered cylinder (7) and the second tapered cylinder (4) are all made of titanium plate.

8. The sutures-free vascular graft bridge of claim 7, wherein: The titanium plate is provided with a plurality of mesh holes.

9. The sutures-free vascular graft bridge of claim 1, wherein: The diameter of the artificial blood vessel is φ18-30mm.

10. The sutures-free vascular graft bridge of claim 9, wherein: The diameter of the support cylinder is φ18-30mm, and the length thereof is 20-40mm.

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