Artificial blood vessel provided with supporting ring and used for aorta I-type hybridization operation

Abstract

The utility model discloses an artificial blood vessel provided with a support ring and used for aorta I-type hybridization surgery, which comprises an artificial blood vessel main body, the artificial blood vessel main body comprises a blood vessel middle end, one end of the blood vessel middle end is communicated with an artery connection front end, and the other end of the blood vessel middle end is communicated with an artery connection rear end. The section of the blood vessel middle end is of a corrugated structure, an anti-torsion mechanism is arranged on one side of the blood vessel middle end, and the anti-torsion mechanism comprises a fixing ring installed on one side of the blood vessel middle end. According to the utility model, one side of the artificial blood vessel main body is conveniently drawn in the vertical direction through mutual traction among the plurality of connecting rods up and down, and transverse torsion possibly generated by the artificial blood vessel main body is conveniently resisted by utilizing the elasticity characteristic of the connecting rods, so that torsion and knotting of the artificial blood vessel main body are avoided; therefore, the smoothness of blood operation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of artificial blood vessels, in particular to an artificial blood vessel with a support ring for aortic type I hybrid surgery. Background Art

[0002] Aortic type I hybrid surgery refers to the repair of aortic arch pathology using standard arch replacement technology combined with implantation of a covered stent in the descending aorta. It is divided into simultaneous surgery (hybrid type Ia) and staged surgery (hybrid type Ib). Both surgeries are suitable for patients with aortic dissection extending to the descending aorta, and artificial blood vessels are generally required to replace the damaged arterial blood vessels during the operation.

[0003] Chinese patent authorization announcement number CN212037828U discloses an open implantable composite artificial blood vessel for replacing the aortic arch hybrid surgery, including three branches of the five-branch artificial blood vessel respectively anastomosed with the innominate artery, the left common carotid artery, and the left subclavian artery, the fourth branch is used for blood perfusion, and the fifth branch is connected to the implantable composite artificial blood vessel. The front end artificial blood vessel of the implantable composite artificial blood vessel is used to replace the ascending aorta. The utility model can be implanted in the state where only the ascending aorta is open without a hybrid operating room. The composite artificial blood vessel shortens the operation time and reduces complications, achieves the effect of the aortic arch hybrid surgery, and has great clinical value. The above-mentioned prior art scheme has the following shortcomings: due to the complexity of the internal environment of the human body, after the artificial blood vessel is replaced, it is easy to be squeezed by organs, body fluids, etc. and move. In this scheme, since the stent artificial blood vessel mainly plays a role in blood circulation, its structure is relatively long, and it is easy to twist in the human body, resulting in a decrease in the inner diameter of the blood vessel. Since only an elastic metal stent is provided in the stent artificial blood vessel, it is not easy to resist the lateral torsion of the blood vessel, so there is a certain room for improvement. Utility Model Content

[0004] The utility model aims to provide an artificial blood vessel with a support ring for aortic type I hybrid surgery, so as to solve the problem that the existing artificial blood vessels mentioned in the above background technology are not easy to resist lateral torsion.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an artificial blood vessel with a support ring for aortic type I hybrid surgery, comprising an artificial blood vessel main body, the artificial blood vessel main body comprising a blood vessel middle end, and one end of the blood vessel middle end is connected to an arterial connection front end, and the other end of the blood vessel middle end is connected to an arterial connection rear end, the cross-section of the blood vessel middle end is a corrugated structure, one side of the blood vessel middle end is provided with an anti-torsion mechanism, and the anti-torsion mechanism comprises a fixed ring installed on one side of the blood vessel middle end, connecting rods are installed on both sides of the fixing ring, and movable rings are installed at the bottom ends of the outer sides of the connecting rods, a plurality of the fixing rings are provided, and are vertically distributed at equal intervals, the bottom end of the upper connecting rod passes through the interior of the lower fixing ring, and the lower connecting rod passes through the interior of the upper movable ring.

[0006] When using an artificial blood vessel with a support ring for aortic type I hybrid surgery according to the technical solution, the upper and lower multiple connecting rods are mutually restrained so as to form vertical traction on one side of the artificial blood vessel body. The elastic characteristics of the connecting rods are utilized to resist the lateral torsion that may be produced by the artificial blood vessel body, so as to avoid twisting and knotting of the artificial blood vessel body, thereby ensuring the patency of blood circulation.

[0007] Preferably, the artificial blood vessel body is made of expanded polytetrafluoroethylene, and both the inner and outer surfaces of the artificial blood vessel body are provided with an anti-coagulation layer.

[0008] Preferably, the material of the anticoagulant layer is a heparin anticoagulant coating.

[0009] Preferably, the fixing ring is located at the corrugated protrusion on the middle end of the blood vessel.

[0010] Preferably, the connecting rod is an elastic metal wire, and a plurality of groups of the connecting rods are provided, and each group is provided with two connecting rods, and the two connecting rods are distributed in an inverted eight shape.

[0011] Preferably, a support ring body is provided on the outer sides of the artery connection front end and the artery connection rear end, and the support ring body is composed of four expansion strips and four connection strips alternately connected.

[0012] Preferably, the expansion strip is in a V-shaped structure, is an elastic metal strip, and the connecting strip is in an arc-shaped structure.

[0013] Preferably, both ends of the outer side of the connecting strip are installed with anti-skid pads, and the outer side of the anti-skid pad is evenly installed with anti-skid strips.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) The upper and lower connecting rods are mutually restrained to form vertical traction on one side of the artificial blood vessel body. The elastic characteristics of the connecting rods are used to resist the lateral torsion that may be generated by the artificial blood vessel body, so as to avoid the torsion and knotting of the artificial blood vessel body, thereby ensuring the patency of blood circulation;

[0016] Through the special structure of the middle end of the blood vessel and the function of the movable ring, the length of the artificial blood vessel body has a certain degree of expansion and contraction, so that the artificial blood vessel body has a certain degree of bending toughness inside the human body, so that it can adapt to the characteristics of the internal environment of the human body;

[0017] The particularity of the position of the fixed ring ensures the smoothness of the movable ring sliding up and down along the connecting rod, thereby reducing the contact friction between the movable ring and the artificial blood vessel body;

[0018] (2) Through the elastic effect of the expansion strip, the size of the opening between the front end of the artery connection or the rear end of the artery connection can be adjusted, so that the two ends of the artificial blood vessel body can be closely attached to the inner wall of the connected human blood vessel, thereby reducing the connection gap between the artificial blood vessel body and the human blood vessel after docking;

[0019] The anti-skid pad and the anti-skid strip can further increase the contact friction between the support ring body and the inner wall of the human blood vessel, thereby improving the connection stability between the artificial blood vessel body and the human blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the support ring main body of the utility model;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the anti-slip mat of the utility model;

[0024] Figure 4 It is a three-dimensional structural schematic diagram of the anti-torsion mechanism of the utility model;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the artificial blood vessel main body of the utility model.

[0026] Explanation of the reference numerals in the figure: 1. artificial blood vessel body; 101. front end of artery connection; 102. rear end of artery connection; 103. middle end of blood vessel; 2. support ring body; 201. expansion strip; 202. connecting strip; 3. anti-slip pad; 4. anti-twist mechanism; 401. fixing ring; 402. connecting rod; 403. movable ring; 5. anti-slip strip. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-Figure 5 , the utility model provides the following technical solutions:

[0029] Embodiment 1: In order to solve the problem that the existing artificial blood vessels are not easy to resist lateral torsion, the following solution is disclosed. Figure 1 , Figure 4 , Figure 5 As shown, it includes an artificial blood vessel body 1, the material of the artificial blood vessel body 1 is expanded polytetrafluoroethylene, the inner and outer surfaces of the artificial blood vessel body 1 are both provided with anticoagulant layers, the material of the anticoagulant layers is heparin anticoagulant coating, the artificial blood vessel body 1 includes a blood vessel middle end 103, and one end of the blood vessel middle end 103 is connected to an artery connection front end 101, and the other end of the blood vessel middle end 103 is connected to an artery connection rear end 102, the cross section of the blood vessel middle end 103 is a corrugated structure, the fixing ring 401 is located at the corrugated protrusion on the blood vessel middle end 103, the connecting rod 402 is an elastic metal wire, and the connecting rod 402 is provided There are multiple groups, and each group is provided with two, and the two connecting rods 402 are distributed in an inverted eight shape, and an anti-torsion mechanism 4 is provided on one side of the middle end 103 of the blood vessel, and the anti-torsion mechanism 4 includes a fixed ring 401 installed on one side of the middle end 103 of the blood vessel, connecting rods 402 are installed on both sides of the fixed ring 401, and movable rings 403 are installed on the bottom ends of the outer sides of the connecting rods 402, and multiple fixed rings 401 are provided, and are vertically distributed at equal intervals, the bottom end of the upper connecting rod 402 passes through the interior of the lower fixed ring 401, and the lower connecting rod 402 passes through the interior of the upper movable ring 403.

[0030] In this embodiment, when the middle end 103 of the blood vessel is squeezed between organs and twisted laterally during use, the movement of the middle end 103 of the blood vessel drives the fixing ring 401 to move, and then the upper and lower fixing rings 401 are misaligned to drive the connecting rod 402 to twist and move. Due to the elastic effect of the connecting rod 402 and the interaction of multiple vertically distributed connecting rods 402, an antagonistic force opposite to the direction of the twisting force is generated to drive the artificial blood vessel body 1 to reset, thereby avoiding the contraction of the tube diameter of the artificial blood vessel body 1 due to twisting and avoiding blood blockage. Under the action of the heparin anticoagulant coating, the activity of antithrombin in the blood is enhanced, thereby reducing the coagulation of blood during the circulation process and the blockage of the artificial blood vessel body 1, thereby increasing the patency of the blood in the artificial blood vessel body 1.

[0031] Embodiment 2: This embodiment is different from the embodiment 1. The support ring body 2, the anti-slip pad 3 and the anti-slip strip 5 are used to increase the tightness of the connection between the artificial blood vessel body 1 and the human blood vessel. Figure 1 , Figure 4 , Figure 5 As shown, a support ring body 2 is provided on the outer side of the arterial connection front end 101 and the arterial connection rear end 102, and the support ring body 2 is composed of four expansion strips 201 and four connecting strips 202 that are alternately connected. The expansion strips 201 are V-shaped structures, and the expansion strips 201 are elastic metal strips. The connecting strips 202 are arc-shaped structures, and anti-slip pads 3 are installed at both ends of the outer side of the connecting strips 202, and anti-slip strips 5 are evenly installed on the outer side of the anti-slip pads 3.

[0032] In this embodiment, when in use, the artificial blood vessel body 1 is inserted into the interior of the human blood vessel through the external catheter bracket, and the elastic effect of the expansion strip 201 is used to expand the front end 101 of the artery connection or the rear end 102 of the artery connection, so that the front end 101 of the artery connection or the rear end 102 of the artery connection is tightly attached to the inner wall of the human blood vessel, and then the artificial blood vessel body 1 is connected to the human blood vessel by suturing, and the anti-slip pad 3 and the anti-slip strip 5 are used to increase the contact friction between the front end 101 of the artery connection, the rear end 102 of the artery connection and the inner wall of the blood vessel, reduce the force at the connection between the artificial blood vessel body 1 and the human blood vessel under the impact of blood flow, and ensure the installation stability of the artificial blood vessel body 1.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An artificial blood vessel with a support ring for aortic type I hybrid surgery, comprising an artificial blood vessel body (1), characterized in that: The artificial blood vessel body (1) comprises a blood vessel middle end (103), and one end of the blood vessel middle end (103) is connected to an artery connection front end (101), and the other end of the blood vessel middle end (103) is connected to an artery connection rear end (102). The cross-section of the blood vessel middle end (103) is a corrugated structure. An anti-twist mechanism (4) is provided on one side of the blood vessel middle end (103), and the anti-twist mechanism (4) comprises a fixed ring (401) installed on one side of the blood vessel middle end (103). Connecting rods (402) are installed on both sides of the fixing ring (401), and movable rings (403) are installed at the bottom ends of the outer sides of the connecting rods (402). A plurality of fixing rings (401) are provided and are vertically distributed at equal intervals. The bottom end of the upper connecting rod (402) passes through the interior of the lower fixing ring (401), and the lower connecting rod (402) passes through the interior of the upper movable ring (403).

2. The artificial blood vessel with a support ring for aortic type I hybrid surgery according to claim 1, characterized in that: The material of the artificial blood vessel body (1) is expanded polytetrafluoroethylene, and both the inner and outer surfaces of the artificial blood vessel body (1) are provided with an anti-coagulation layer.

3. The artificial blood vessel with a support ring for aortic type I hybrid surgery according to claim 2, characterized in that: The material of the anticoagulation layer is heparin anticoagulation coating.

4. The artificial blood vessel with a support ring for aortic type I hybrid surgery according to claim 1, characterized in that: The fixing ring (401) is located at the corrugated protrusion on the middle end (103) of the blood vessel.

5. The artificial blood vessel with a support ring for aortic type I hybrid surgery according to claim 1, characterized in that: A support ring body (2) is provided on the outside of the artery connection front end (101) and the artery connection rear end (102), and the support ring body (2) is composed of four expansion strips (201) and four connection strips (202) connected alternately.

6. The artificial blood vessel with a support ring for aortic type I hybrid surgery according to claim 5, characterized in that: The expansion strip (201) has a V-shaped structure, and is an elastic metal strip; the connection strip (202) has an arc-shaped structure.

7. The artificial blood vessel with a support ring for aortic type I hybrid surgery according to claim 6, characterized in that: Anti-skid pads (3) are installed at both ends of the outer side of the connecting strip (202), and anti-skid strips (5) are evenly installed on the outer side of the anti-skid pad (3).

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