CN111329620A

CN111329620A - Artery stent blood vessel unit

Info

Publication number: CN111329620A
Application number: CN202010304615.9A
Authority: CN
Inventors: 陈宏伟; 叶毅敏
Original assignee: 陈宏伟
Current assignee: Zhongshan Hospital Fudan University
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-06-26

Abstract

The utility model provides an artery support blood vessel unit, includes the tubulose tectorial membrane and locates the support ring on the tubulose tectorial membrane, and the tubulose tectorial membrane is crooked form or straight tube-shape, is equipped with one at least on this tubulose tectorial membrane the support ring, the entry end and the exit end of tubulose tectorial membrane all form the incision face, and wherein, crooked form two incision faces of tubulose tectorial membrane are scarf and/or vertical section, and straight tube-shape tubulose tectorial membrane has at least one incision face to be the scarf. When the invention constructs the artery stent blood vessel, the artery stent blood vessel units with different specifications can be selected according to different blood vessel curvatures of patients for splicing, the requirements of patients with different blood vessel curvatures are met, the constructed artery stent blood vessel is matched with the space shape of the aorta blood vessel of the human body in a natural state and is implanted into the blood vessel of the human body, the tubular coating can be better attached to the blood vessel without folds, the straightening force generated after the artery stent blood vessel is released in the blood vessel is reduced, and the artery stent blood vessel is prevented from oppressing the blood vessel.

Description

Artery stent blood vessel unit

Technical Field

The invention relates to the field of implantable blood vessels, in particular to an artery stent blood vessel unit.

Background

Thoracic aortic aneurysm and aortic dissection are catastrophic diseases seriously threatening the lives of the masses of people, and have high disability rate and high death rate without active treatment. In recent years, the incidence of thoracic aortic aneurysm and aortic dissection has increased significantly with the increase in incidence of hypertension, hyperlipidemia, hyperglycemia, and trauma. At present, the arterial stent vascular repair is good in curative effect and is developed rapidly.

At present, an existing arterial stent blood vessel is generally in a linear tubular structure before being implanted into an aortic blood vessel, and includes a tubular cover and a stent arranged on the tubular cover, wherein the stent includes a plurality of wavy support rings distributed at equal intervals along the axial direction of the tubular cover. However, because of the different curvature of the aorta vessels of the human body, although the aortic stent of the prior structure can basically conform to the requirement of the bending of the blood vessels after being delivered into the aortic arch part and released, the resilience force generated on the two sides of the bending of the blood vessels is larger, so that the blood vessels at the corresponding positions are greatly pressed, and even the blood vessels are ruptured.

Moreover, the high flexibility of the stent enables the framework to generate corresponding deformation along with the rise of thrombus in the blood vessel, so that the outer wall of the framework is better attached to the blood vessel with pathological changes, but the fold of the covering film in the stent is also caused, and the inner cavity of the stent is not smooth any more but is in an irregular shape. The irregular morphology of the stent's lumen tends to alter blood flow in the lumen of the vessel, e.g., creating vortices and the like in the vessel. And the change of blood flow in the lumen of the blood vessel easily causes thrombus to be generated in the inner cavity of the covered stent, thereby causing restenosis in the covered stent. In the clinical application of the stent graft, the problem of restenosis of the stent graft has been the focus of clinical research. To this end, we provide an arterial stent vascular unit.

Disclosure of Invention

The invention provides an arterial stent blood vessel unit, which aims to overcome the defects that the resilience force generated on two bent sides of a blood vessel by the conventional aortic stent is large, the blood vessel at the corresponding position is greatly compressed, a covering film is easily influenced by the deformation of the stent blood vessel to generate folds and the like.

The invention adopts the following technical scheme:

the utility model provides an artery support vascular unit, includes the tubulose tectorial membrane and locates the support ring on the tubulose tectorial membrane, its characterized in that: the tubular film is in a bent shape or a straight cylinder shape, at least one support ring is arranged on the tubular film, the inlet end and the outlet end of the tubular film both form cutting surfaces, wherein the two cutting surfaces of the bent tubular film are oblique cutting surfaces and/or vertical cutting surfaces, and at least one cutting surface of the straight cylinder shaped tubular film is an oblique cutting surface.

Specifically, the tubular tectorial membrane of curved form includes a big camber and a little camber, big camber reaches the plane at little camber place forms the plane of symmetry of curved tubular tectorial membrane, and this plane of symmetry will the support ring divide into two half support rings, every half support ring includes a plurality of ripples circle, follows on every half support ring the ripples circle of long side to short side distributes from big to little.

Further, the intersection line of the oblique cutting plane of the curved tubular coating and the symmetrical plane forms an acute angle or an obtuse angle with the tangent line of the corresponding large-bending side; the vertical tangent plane is vertical to the symmetrical plane, and the intersection line of the vertical tangent plane and the symmetrical plane forms a right angle with the tangent line of the corresponding large bending side.

Preferably, both of the cut surfaces of the curved tubular coating are vertical cut surfaces.

Preferably, both of the cut surfaces of the curved tubular coating are chamfered.

Preferably, two cut surfaces of the curved tubular coating are a chamfer surface and a vertical cut surface.

Furthermore, the intersection line of the oblique cutting plane of the straight tubular coating and the symmetrical plane of the straight tubular coating forms an acute angle or an obtuse angle with the central axis of the straight tubular coating.

Preferably, both of the cut surfaces of the straight tubular coating are chamfered.

Preferably, one of the two cut surfaces of the straight tubular coating is a diagonal cut surface, and the other is a vertical cut surface, and an intersection line of the vertical cut surface of the straight tubular coating and a symmetric surface of the straight tubular coating is perpendicular to a central axis of the straight tubular coating.

Further, the tubular cover film has different tube diameters along the length extension direction.

Further, the support ring is made of medical stainless steel, memory alloy or degradable biological materials.

From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:

1. according to the artery stent vascular unit, the tubular coating is in a curved shape or a straight cylindrical shape, and when the tubular coating is in a curved shape, two incision surfaces of the tubular coating are oblique and/or vertical; when the tubular coating is in a straight cylinder shape, at least one cut surface is a chamfer surface. Therefore, when the artery stent blood vessel is constructed, the artery stent blood vessel units with different specifications can be selected according to different blood vessel curvatures of patients for splicing, and the constructed artery stent blood vessel can meet the requirements of the patients with different blood vessel curvatures.

2. By adopting the arterial stent vascular unit, the constructed arterial stent vascular is matched with the space shape of the aortic blood vessel of a human body in a natural state, when the arterial stent vascular unit is implanted into the blood vessel of the human body, on one hand, the tubular coating of the arterial stent vascular unit can be better attached to the blood vessel without folds, on the other hand, the straightening force generated after the arterial stent vascular unit is released in the blood vessel can be greatly reduced, and the vascular unit can prevent the arterial stent vascular unit from oppressing the blood vessel.

Drawings

Fig. 1 is a front view of a first embodiment of an arterial stent vascular unit of the present invention.

Fig. 2 is a schematic view of view a in fig. 1.

Fig. 3 is a front view of a second embodiment of the arterial stent vascular unit of the present invention.

Fig. 4 is a front view of a third embodiment of the arterial stent vascular unit of the present invention.

Fig. 5 is a schematic structural diagram of a fourth embodiment of the arterial stent vascular unit of the present invention.

Fig. 6 is a front view of a fifth embodiment of the arterial stent vascular unit of the present invention.

Fig. 7 is a top view of fig. 6.

Fig. 8 is a front view of a sixth embodiment of the arterial stent vascular unit of the present invention.

Fig. 9 is a schematic structural diagram of a seventh embodiment of the arterial stent vascular unit of the present invention.

Fig. 10 is a schematic structural diagram of a two-dimensional curved arterial stent blood vessel obtained by splicing a plurality of arterial stent blood vessel units.

Fig. 11 is a schematic structural diagram of an arterial stent with three-dimensional curvature obtained by splicing a plurality of arterial stent blood vessel units.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

Well-known structures or materials are not shown or described in detail in the various embodiments of the invention. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Furthermore, it should be understood by those skilled in the art that the following embodiments are illustrative only and are not intended to limit the scope of the present invention. It will also be readily understood that the components of the embodiments illustrated in the figures and described herein may be arranged and designed in a wide variety of different configurations or proportions.

Example one

An arterial stent vascular unit, referring to fig. 1 and 2, comprises a tubular coating 10 and a support ring 20 arranged on the tubular coating 10. The tubular coating 10 of the present embodiment is curved, the inlet end and the outlet end of the tubular coating 10 both form cut surfaces 101, and both the cut surfaces 101 of the present embodiment are vertical cut surfaces. The tubular coating 10 comprises a large curved side 11 and a small curved side 12, the plane of the large curved side 11 and the small curved side 12 forming a symmetry plane of the curved tubular coating 10. The 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.

Referring to fig. 1 and 2, the tubular coating 10 is provided with at least one support ring 20 along the circumferential surface in the bending direction thereof, and the present embodiment specifically shows two support rings 20. Support ring 20 is in big camber side 11 reaches divide into two half support rings 21 between the little camber side 12, every half support ring 21 includes that a plurality of connects gradually the wave circle that forms the wavy structure, follows on every half support ring 21 big camber side 11 distributes to little camber side 12's all wave circles by big to little, and the mode of setting up of this kind of wave circle, the main objective is the arc bending structure of cooperation tubulose tectorial membrane 10, makes the release in arterial stent vascular unit implantation aorta blood vessel, reduces the straight power that the aortic stent produced by a wide margin.

The tubular coating film of the embodiment is curved, the incision surfaces at two ends of the tubular coating film are vertical sections, and stent blood vessels with various curvatures can be constructed by selecting the artery stent blood vessel units with different curvatures. And because every two arterial support blood vessel units can freely rotate when in butt joint, arterial support blood vessels with different three-dimensional space forms can be constructed so as to adapt to the requirements of patients with special aortic blood vessel deformation curvature.

Example two

Referring to fig. 3, the arterial stent vascular unit of the present embodiment includes a tubular coating 10 and a support ring 20 provided on the tubular coating 10, the tubular coating 10 is curved, and the main difference between the present embodiment and the first embodiment is that: the two cut surfaces 101 of the present embodiment are oblique cut surfaces, the two oblique cut surfaces are perpendicular to the symmetry plane of the curved tubular film 10, and the intersection line of the oblique cut surfaces and the symmetry plane and the tangent line of the corresponding large curved side form an included angle, which is a non-right angle. The included angles specifically shown in this embodiment are all acute angles, but may all be obtuse angles, or one acute angle and one obtuse angle.

EXAMPLE III

Referring to fig. 4, the arterial stent vascular unit of the present embodiment includes a tubular coating 10 and a support ring 20 disposed on the tubular coating 10, the tubular coating 10 is curved, and both of the two incision surfaces 101 of the present embodiment are oblique surfaces, which is different from the second embodiment mainly in that: both chamfer planes of the present embodiment are not perpendicular to the plane of symmetry of the curved tubular membrane 10.

Example four

Referring to fig. 3, the arterial stent vascular unit of this embodiment includes a tubular coating 10 and a support ring 20 disposed on the tubular coating 10, where the tubular coating 10 is curved, and the main difference between this embodiment and the second embodiment is that: in the present embodiment, the intersection line of the oblique cut plane and the symmetrical plane of the curved tubular coating forms an acute angle with the tangent line of the corresponding large curved side. The chamfer and the vertical section can be arbitrarily divided between the two cut surfaces.

EXAMPLE five

Referring to fig. 6 and 7, the arterial stent vascular unit of the present embodiment includes a tubular stent 10 and a support ring 20 provided on the tubular stent 10, and the tubular stent 10 of the present embodiment has a straight tubular shape. The inlet end and the outlet end of the straight tubular film 10 both form a cut surface 101, both the cut surfaces 101 of the straight tubular film 10 are oblique cut surfaces, and the intersecting line formed by the oblique cut surfaces and the symmetrical surface of the straight tubular film 10 and the central axis of the straight tubular film 10 form a non-right angle included angle, which is an obtuse angle, but can be an acute angle, or an acute angle or an obtuse angle. And both of the chamfer planes of this embodiment are perpendicular to the plane of symmetry with the straight tubular film 10, respectively.

The straight tubular film 10 of this embodiment is provided with two support rings 20 on its circumference in the axial direction, and the support rings are provided on the inner or outer side of the film or integrated with the support rings. Each support ring 20 comprises a plurality of wave rings 21 connected in series to form a wave-like structure.

EXAMPLE six

Referring to fig. 8, the arterial stent vascular unit of the present embodiment includes a tubular stent 10 and a support ring 20 provided on the tubular stent 10, and the tubular stent 10 of the present embodiment has a straight tubular shape. The inlet end and the outlet end of the straight tubular film 10 both form a cut surface 101, and both the cut surfaces 101 of the present embodiment are also chamfered surfaces, but the present embodiment is mainly different from the fifth embodiment in that: the chamfer of the present embodiment is not perpendicular to the plane of symmetry of the straight tubular film 10.

EXAMPLE seven

Referring to fig. 9, the arterial stent vascular unit of the present embodiment includes a tubular stent 10 and a support ring 20 provided on the tubular stent 10, the tubular stent 10 of the present embodiment is also in a straight tubular shape, and the main difference between the present embodiment and the fifth embodiment is that: in the present embodiment, two cut surfaces of the tubular coating are a diagonal cut surface and a perpendicular cut surface. In the embodiment, the intersection line of the oblique cutting plane and the symmetrical plane of the straight tubular coating and the central axis of the straight tubular coating form an obtuse angle, but may be an acute angle; the intersecting line of the vertical section and the symmetrical plane of the straight tubular coating is vertical to the central axis of the straight tubular coating. The chamfer and the normal tangent of this embodiment can be arbitrarily divided between the two cut planes.

Referring to fig. 10, the figure shows the human artery stent with two-dimensional curvature obtained by splicing a plurality of artery stent blood vessel units of the different embodiments. The principle of the artery stent blood vessel splicing is as follows: when the bending amplitude of the blood vessel is relatively large, the large bending side of the artery stent blood vessel unit corresponds to the large bending side of the artery blood vessel of the patient; when the bending amplitude of the blood vessel is small, the distal end part can be preferably selected to connect a plurality of straight-tube-shaped artery stent blood vessel units.

Referring to fig. 11, fig. 11 shows a three-dimensional curved human artery stent blood vessel formed by splicing a plurality of artery stent blood vessel units of the above different embodiments.

The tubular membranes shown in the above embodiments have the same tube diameter along the length extension direction, and certainly, in the specific implementation process, the tube diameters of the tubular membranes along the length extension direction can be different, so as to adapt to the tube diameter requirements of different arterial vessels of a human body.

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

The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.

Claims

1. The utility model provides an artery support vascular unit, includes the tubulose tectorial membrane and locates the support ring on the tubulose tectorial membrane, its characterized in that: the tubular film is in a bent shape or a straight cylinder shape, at least one support ring is arranged on the tubular film, the inlet end and the outlet end of the tubular film both form cutting surfaces, wherein the two cutting surfaces of the bent tubular film are oblique cutting surfaces and/or vertical cutting surfaces, and at least one cutting surface of the straight cylinder shaped tubular film is an oblique cutting surface.

2. An arterial stent vascular unit as defined in claim 1, wherein: the curved tubulose tectorial membrane includes a big camber and a little camber, big camber reaches the plane at little camber place forms the plane of symmetry of curved tubulose tectorial membrane, and this plane of symmetry will the support ring divide into two half support rings, every half support ring includes a plurality of ripples circle, follows on every half support ring the ripples circle of long side to short side distributes from big to little.

3. An arterial stent vascular unit as defined in claim 2, wherein: the intersection line of the oblique cutting plane of the curved tubular coating and the symmetrical plane forms an acute angle or an obtuse angle with the tangent line of the corresponding large bending side; the vertical tangent plane is vertical to the symmetrical plane, and the intersection line of the vertical tangent plane and the symmetrical plane forms a right angle with the tangent line of the corresponding large bending side.

4. An arterial stent vascular unit as defined in claim 3 wherein: two cutting surfaces of the bent tubular film are vertical cutting surfaces.

5. An arterial stent vascular unit as defined in claim 3 wherein: two incision surfaces of the bent tubular film are oblique cutting surfaces.

6. An arterial stent vascular unit as defined in claim 3 wherein: two cutting surfaces of the curved tubular film are respectively a diagonal cutting surface and a vertical cutting surface.

7. An arterial stent vascular unit as defined in claim 1, wherein: the intersection line of the oblique cutting plane of the straight tubular coating and the symmetrical plane of the straight tubular coating and the central axis of the straight tubular coating form an acute angle or an obtuse angle.

8. An arterial stent vascular unit as claimed in claim 7, wherein: two incision surfaces of the straight tubular film are oblique cutting surfaces.

9. An arterial stent vascular unit as claimed in claim 7, wherein: and the intersecting line of the vertical section of the straight tubular film and the symmetrical plane of the straight tubular film is vertical to the central axis of the straight tubular film.

10. An arterial stent vascular unit as defined in claim 1, wherein: the tubular film has different tube diameters along the length extension direction.