Arterial stent blood vessel unit

Abstract

An arterial stent blood vessel unit includes a tubular coating and a support ring arranged on the tubular coating, wherein the tubular coating is curved or straight, and at least one support ring is arranged on the tubular coating, and the inlet end and the outlet end of the tubular coating both form cut surfaces, wherein the two cut surfaces of the curved tubular coating are oblique cut surfaces and / or vertical cut surfaces, and the straight tubular coating has at least one cut surface that is an oblique cut surface. When constructing an arterial stent blood vessel, the present invention can select arterial stent blood vessel units of different specifications for splicing according to the different vascular curvatures of the patient, so as to meet the needs of patients with various different vascular curvatures. The constructed arterial stent blood vessel matches the spatial form of the human aorta in a natural state, and when implanted in a human blood vessel, the tubular coating can better fit the blood vessel without wrinkles, thereby reducing the recoil force generated by the arterial stent blood vessel after being released in the blood vessel, and preventing it from compressing the blood vessel.

Description

Technical Field

[0001] The invention relates to the field of implantable blood vessels, and more particularly to an arterial stent blood vessel unit. Background Art

[0002] At present, the existing arterial stents are usually straight tubular structures before being implanted in the aorta, including a tubular coating and a stent arranged on the tubular coating, wherein the stent includes a plurality of wavy support rings distributed at equal intervals along the axial direction of the tubular coating. However, due to the different curvatures of the aorta in the human body, although the aortic stents of the existing structures can basically conform to the requirements of the blood vessel curvature after being delivered into the aortic arch and released, the rebound force generated on both sides of the blood vessel curvature is relatively large, which brings greater pressure to the blood vessels at the corresponding positions, and even causes the blood vessels to rupture.

[0003] Moreover, the high flexibility of the stent allows the skeleton to deform accordingly as the thrombus in the blood vessel bulges, allowing the outer wall of the skeleton to better fit the diseased blood vessel, but this also causes wrinkles in the stent coating, and the inner lumen of the stent is no longer smooth, but irregular in shape. The irregular shape of the inner lumen of the stent can easily change the blood flow in the lumen of the blood vessel, such as generating vortices in the blood vessel. The change in the blood flow in the lumen of the blood vessel can easily cause thrombus formation in the inner lumen of the coated stent, causing restenosis in the coated stent. In the clinical application of coated stents, the problem of restenosis of coated stents has always been the focus of clinical research. To this end, we provide an arterial stent vascular unit. Summary of the invention

[0004] The present invention provides an arterial stent blood vessel unit to solve the shortcomings of the existing aortic stent, such as the large rebound force generated on both sides of the blood vessel bend, which brings great pressure to the blood vessels at the corresponding positions, and the coating is easily affected by the deformation of the stent blood vessel to produce wrinkles.

[0005] The present invention adopts the following technical solution:

[0006] An arterial stent blood vessel unit comprises a tubular coating and a support ring arranged on the tubular coating, characterized in that: the tubular coating is curved or straight, at least one support ring is arranged on the tubular coating, and the inlet end and the outlet end of the tubular coating both form cut surfaces, wherein the two cut surfaces of the curved tubular coating are oblique cut surfaces and / or vertical cut surfaces, and the straight tubular coating has at least one cut surface which is an oblique cut surface.

[0007] Specifically, the curved tubular coating includes a large curved side and a small curved side, and the planes where the large curved side and the small curved side are located form a symmetry plane of the curved tubular coating, and the symmetry plane divides the support ring into two half support rings, each of the half support rings includes a plurality of wave circles, and the wave circles on each half support ring are distributed from large to small from the long side to the short side.

[0008] Furthermore, the intersection line of the oblique section of the curved tubular coating with the symmetry plane and the tangent line of its corresponding large curved side forms an acute angle or an obtuse angle; the vertical section is perpendicular to the symmetry plane, and the intersection line of the vertical section with the symmetry plane and the tangent line of its corresponding large curved side forms a right angle.

[0009] Preferably, both of the two cut surfaces of the curved tubular coating are vertical cut surfaces.

[0010] Preferably, both cut surfaces of the curved tubular coating are beveled surfaces.

[0011] Preferably, one of the two cut surfaces of the curved tubular coating is an oblique cut surface, and the other is a vertical cut surface.

[0012] Furthermore, the intersection line of the oblique cut surface of the straight tubular coating and the symmetry plane of the straight tubular coating forms an acute angle or an obtuse angle with the central axis of the straight tubular coating.

[0013] Preferably, both cut surfaces of the straight tubular coating are beveled surfaces.

[0014] Preferably, the two cut surfaces of the straight tubular coating are one oblique cut surface and the other vertical cut surface, and the intersection line of the vertical cut surface of the straight tubular coating and the symmetry plane of the straight tubular coating is perpendicular to the central axis of the straight tubular coating.

[0015] Furthermore, the diameters of the tubular coating are different along the length extension direction thereof.

[0016] Furthermore, the support ring is supported by medical stainless steel, memory alloy or degradable biomaterial.

[0017] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages:

[0018] 1. The arterial stent blood vessel unit of the present invention has a tubular coating that is curved or straight. When the tubular coating is curved, its two cut surfaces are oblique cut surfaces and / or vertical cut surfaces; when the tubular coating is straight, at least one cut surface is an oblique cut surface. Therefore, when constructing an arterial stent blood vessel, arterial stent blood vessel units of different specifications can be selected for splicing according to the different vascular curvatures of the patient, and the constructed arterial stent blood vessel can meet the needs of patients with various vascular curvatures.

[0019] 2. By using the arterial stent blood vessel unit of the present invention, the constructed arterial stent blood vessel matches the spatial shape of the human aorta in a natural state. When it is implanted into a human blood vessel, on the one hand, its tubular coating can better fit the blood vessel without wrinkles. On the other hand, it can greatly reduce the recoil force generated by the arterial stent blood vessel after being released into the blood vessel, preventing it from causing compression to the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the first embodiment of the arterial stent blood vessel unit of the present invention.

[0021] Figure 2 for Figure 1 Schematic diagram of view A in the middle.

[0022] Figure 3 It is a front view of the second embodiment of the arterial stent blood vessel unit of the present invention.

[0023] Figure 4 This is a front view of the third embodiment of the arterial stent blood vessel unit of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the fourth embodiment of the arterial stent blood vessel unit of the present invention.

[0025] Figure 6 It is a front view of the fifth embodiment of the arterial stent blood vessel unit of the present invention.

[0026] Figure 7 for Figure 6 Top view of the .

[0027] Figure 8 It is a front view of the sixth embodiment of the arterial stent blood vessel unit of the present invention.

[0028] Fig. 9 It is a schematic diagram of the structure of the seventh embodiment of the arterial stent blood vessel unit of the present invention.

[0029] Fig.10 It is a schematic diagram of the structure of a two-dimensional curved arterial stent obtained by splicing multiple arterial stent blood vessel units.

[0030] Fig.11 It is a schematic diagram of the structure of a three-dimensional curved arterial stent vessel obtained by splicing multiple arterial stent vessel units. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0032] In various embodiments of the present invention, well-known structures or materials are not shown or described in detail. Moreover, the described features, structures or characteristics may be combined in any manner in one or more embodiments. In addition, it should be understood by those skilled in the art that the various embodiments described below are only for illustration and are not intended to limit the scope of protection of the present invention. It can also be easily understood that the components in the various embodiments described herein and shown in the drawings can be arranged and designed in a variety of different configurations or proportions.

[0033] Embodiment 1

[0034] An arterial stent blood vessel unit, referring to Figure 1 and Figure 2 , including a tubular coating 10 and a support ring 20 provided on the tubular coating 10. The tubular coating 10 of the present embodiment is curved, and the inlet end and the outlet end of the tubular coating 10 both form a cut surface 101, and the two cut surfaces 101 of the present embodiment are both vertical sections. The tubular coating 10 includes a large curved side 11 and a small curved side 12, and the plane where the large curved side 11 and the small curved side 12 are located forms a symmetry plane of the curved tubular coating 10. The above-mentioned vertical section is perpendicular to the symmetry plane of the curved tubular coating 10, and the intersection line of the vertical section and the symmetry plane forms a right angle with the tangent line of the corresponding large curved side 11.

[0035] Reference Figure 1 and Figure 2 At least one support ring 20 is provided on the circumferential surface of the tubular covering 10 along the bending direction thereof, and two support rings 20 are specifically shown in this embodiment. The support ring 20 is divided into two semi-support rings 21 between the large curved side 11 and the small curved side 12, and each semi-support ring 21 includes a plurality of wave circles connected in sequence to form a wave-like structure, and all the wave circles on each semi-support ring 21 from the large curved side 11 to the small curved side 12 are distributed from large to small. The main purpose of the arrangement of such wave circles is to cooperate with the arc-shaped bending structure of the tubular covering 10, so that after the arterial stent vascular unit is implanted in the aorta and released, the restoring force generated by the aortic vascular stent is greatly reduced.

[0036] The tubular coating of this embodiment is curved, and the cut surfaces at both ends are vertical sections. By selecting arterial stent blood vessel units with different curvatures, a variety of stent blood vessels with different curvatures can be constructed. Moreover, since each two arterial stent blood vessel units can rotate freely when docked, arterial stent blood vessels with different three-dimensional spatial forms can be constructed to meet the needs of some patients with special aortic blood vessel deformation curvature.

[0037] Embodiment 2

[0038] The arterial stent blood vessel unit of this embodiment refers to Figure 3, including a tubular coating 10 and a support ring 20 arranged on the tubular coating 10, the tubular coating 10 is curved, and the main difference between this embodiment and the first embodiment is that the two cut surfaces 101 of this embodiment are both beveled surfaces, the two beveled surfaces are perpendicular to the symmetry plane of the curved tubular coating 10, and the intersection line of the beveled surface and the symmetry plane forms an angle with the tangent of the corresponding large curved side, and the angle is not a right angle. The angles specifically shown in this embodiment are all acute angles, of course, they can also be obtuse angles, or one is an acute angle and the other is an obtuse angle.

[0039] Embodiment 3

[0040] The arterial stent blood vessel unit of this embodiment refers to Figure 4 , including a tubular coating 10 and a support ring 20 arranged on the tubular coating 10, the tubular coating 10 is curved, and the two incision surfaces 101 of this embodiment are also beveled surfaces. The main difference between this embodiment and the second embodiment is that the two beveled surfaces of this embodiment are not perpendicular to the symmetry plane of the curved tubular coating 10.

[0041] Embodiment 4

[0042] The arterial stent blood vessel unit of this embodiment, the arterial stent blood vessel unit of this embodiment, refer to Figure 3 , including a tubular covering 10 and a support ring 20 arranged on the tubular covering 10, the tubular covering 10 is curved, and the main difference between this embodiment and the second embodiment is that: the two cut surfaces of this embodiment, one is an oblique cut surface, and the other is a vertical cut surface, wherein the intersection line of the oblique cut surface shown in this embodiment and the symmetry plane of the curved tubular covering forms an acute angle with the tangent line of the corresponding large curved side. The oblique cut surface and the vertical cut surface can be arbitrarily distributed in the two cut surfaces.

[0043] Embodiment 5

[0044] The arterial stent blood vessel unit of this embodiment refers to Figure 6 and Figure 7 , including a tubular coating 10 and a support ring 20 arranged on the tubular coating 10. The tubular coating 10 of this embodiment is straight. The inlet end and the outlet end of the straight tubular coating 10 both form a cut surface 101. The two cut surfaces 101 of this embodiment are both beveled surfaces. The intersection line formed by the beveled surface and the symmetry plane of the straight tubular coating 10 forms a non-right angle with the central axis of the straight tubular coating 10. The angles shown in this embodiment are all obtuse angles, and of course they can also be both acute angles, or one can be an acute angle and the other can be an obtuse angle. And the two beveled surfaces of this embodiment are respectively perpendicular to the symmetry plane of the straight tubular coating 10.

[0045] In this embodiment, the straight tubular covering 10 is provided with two support rings 20 along the circumference of the axial direction thereof, and the support rings are provided inside or outside the covering, or integrated with the support rings. Each support ring 20 includes a plurality of corrugations connected in sequence to form a wave-like structure.

[0046] Embodiment 6

[0047] The arterial stent blood vessel unit of this embodiment refers to Figure 8 , including a tubular covering 10 and a support ring 20 disposed on the tubular covering 10. The tubular covering 10 of this embodiment is in a straight tube shape. The inlet end and the outlet end of the straight tube-shaped tubular covering 10 both form a cut surface 101. The two cut surfaces 101 of this embodiment are also beveled surfaces. However, the main difference between this embodiment and the fifth embodiment is that the beveled surface of this embodiment is not perpendicular to the symmetry plane of the straight tube-shaped tubular covering 10.

[0048] Embodiment 7

[0049] The arterial stent blood vessel unit of this embodiment refers to Fig. 9 , including a tubular coating 10 and a support ring 20 arranged on the tubular coating 10. The tubular coating 10 of this embodiment is also straight-cylindrical. The main difference between this embodiment and the fifth embodiment is that the two cut surfaces of the tubular coating of this embodiment are an oblique cut surface and a vertical cut surface. Among them, the intersection line of the oblique cut surface and the symmetry plane of the straight-cylindrical tubular coating shown in this embodiment forms an obtuse angle with the central axis of the straight-cylindrical tubular coating, which can also be an acute angle; the intersection line of the vertical cut surface and the symmetry plane of the straight-cylindrical tubular coating is perpendicular to the central axis of the straight-cylindrical tubular coating. The oblique cut surface and the vertical cut surface of this embodiment can be arbitrarily distributed in the two cut surfaces.

[0050] Reference Fig.10 The figure shows a human artery stent vessel with a two-dimensional curvature obtained by splicing a plurality of artery stent vessel units of the above different embodiments. The principle of splicing the artery stent vessel is: when the curvature of the vessel is relatively large, the large curvature side of the artery stent vessel unit corresponds to the large curvature side of the patient's artery; and when the curvature of the vessel is small, the distal end can preferably be connected with a plurality of straight-tube artery stent vessel units.

[0051] Reference Fig.11 ,Should Fig.11 The figure shows a human artery stent blood vessel with three-dimensional curvature obtained by splicing a plurality of artery stent blood vessel units according to the above different embodiments.

[0052] The tubular coverings shown in the above embodiments have the same diameter along their length extension direction. Of course, in the specific implementation process, the diameters of the tubular coverings along their length extension direction may be different to meet the diameter requirements of different arterial vessels in the human body.

[0053] The above support rings are all made of medical stainless steel alloy rings with good biocompatibility, chemical stability, mechanical and physical properties, such as nickel-based alloys, cobalt-based alloys, 316 medical stainless steel, shape memory alloys or degradable biomaterials; and the tubular coating is polytetrafluoroethylene film, polyester fiber film, polyamide film or polypropylene film.

[0054] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A human artery stent blood vessel, characterized in that: A two-dimensional spatial curvature is obtained by splicing a plurality of the arterial stent blood vessel units, wherein the arterial stent blood vessel unit comprises a tubular covering and a support ring arranged on the tubular covering, wherein the tubular covering is curved or straight, and at least one support ring is arranged on the tubular covering, and the inlet end and the outlet end of the tubular covering both form cut surfaces, wherein the two cut surfaces of the curved tubular covering are oblique cut surfaces and / or vertical cut surfaces, and the straight tubular covering has at least one cut surface which is an oblique cut surface; By selecting arterial stent units with different curvatures, a variety of stents with different curvatures can be constructed. Moreover, since every two arterial stent units can rotate freely when docked, arterial stents with different three-dimensional spatial forms can be constructed to meet the needs of some patients with special aortic vascular deformation curvatures. The principle of splicing the arterial stent is: when the blood vessel is relatively curved, the larger curved side of the arterial stent unit corresponds to the larger curved side of the patient's arterial vessel; and when the blood vessel is relatively curved, the distal end portion is selected to connect multiple straight cylindrical arterial stent units.

2. A human artery stent according to claim 1, characterized in that: The curved tubular coating includes a large curved side and a small curved side. The planes where the large curved side and the small curved side are located form a symmetry plane of the curved tubular coating. The symmetry plane divides the support ring into two half support rings. Each of the half support rings includes a plurality of wave circles. The wave circles on each half support ring are distributed from large to small from the long side to the short side.

3. A human artery stent according to claim 2, characterized in that: The intersection line of the oblique section of the curved tubular coating with the symmetry plane and the tangent line of the corresponding large curved side forms an acute angle or an obtuse angle; the vertical section is perpendicular to the symmetry plane, and the intersection line of the vertical section with the symmetry plane and the tangent line of the corresponding large curved side forms a right angle.

4. A human artery stent according to claim 3, characterized in that: The two cut surfaces of the curved tubular coating are both vertical cut surfaces.

5. A human artery stent according to claim 3, characterized in that: Both cut surfaces of the curved tubular coating are beveled surfaces.

6. A human artery stent according to claim 3, characterized in that: The two cut surfaces of the curved tubular coating are one oblique cut surface and the other vertical cut surface.

7. The human artery stent according to claim 1, characterized in that: The intersection line of the oblique cut surface of the straight tubular coating and the symmetry plane of the straight tubular coating forms an acute angle or an obtuse angle with the central axis of the straight tubular coating.

8. A human artery stent according to claim 7, characterized in that: Both cut surfaces of the straight tubular coating are beveled surfaces.

9. The human artery stent according to claim 7, characterized in that: The two cut surfaces of the straight tubular coating are one oblique cut surface and the other vertical cut surface. The intersection line of the vertical cut surface of the straight tubular coating and the symmetry plane of the straight tubular coating is perpendicular to the central axis of the straight tubular coating.

10. The human artery stent according to claim 1, characterized in that: The tubular coating has different diameters along its length extension direction.

Images