CN215688805U

CN215688805U - Blood vessel stent and stent system

Info

Publication number: CN215688805U
Application number: CN202120607079.XU
Authority: CN
Inventors: 娄德大; 彭宇程; 苏成明
Original assignee: Shenzhen Chuangxin Medical Technology Co ltd
Current assignee: Shenzhen Chuangxin Medical Technology Co ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2022-02-01
Anticipated expiration: 2031-03-25

Abstract

The invention discloses a blood vessel stent and a stent system. This blood vessel support includes support subject, fossil fragments connecting wire and tectorial membrane part, and the support subject is the tubular structure, and the support subject has the punchhole that a plurality of intervals set up, and the support subject includes the exposed section of support and the support tectorial membrane section that relative position set up, and tectorial membrane part covers and is connected in the support tectorial membrane section, and the fossil fragments connecting wire is connected in the support subject and is extended to the support tectorial membrane section by the exposed section of support. The stent system comprises a delivery device and the blood vessel stent, wherein the delivery device is used for matching with the blood vessel stent, and the delivery device is used for delivering the blood vessel stent into the aorta. The blood vessel support is reliable in installation, can properly solve the problem of plugging the distal end groove of the aorta, simultaneously ensures smooth blood supply of branch blood vessels, can be applied to minimally invasive treatment, is favorable for reducing the pain and operation risk of patients, greatly shortens the operation time of operators, and improves the success rate of operations.

Description

Blood vessel stent and stent system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a vascular stent and a stent system.

Background

In recent years, in the medical field, attempts have been made to treat aortic diseases using endoluminal exclusion, with some initial results on associated aneurysm and dissection treatments, and encouraging results. The aortic dissection (aortic dissection) is a catastrophic disease seriously endangering the life safety of patients, and is characterized by sudden onset of disease, rapid disease progression and high mortality, however, clinically, no relevant medical apparatus is available for the treatment of the aortic dissection involving branches, particularly, the treatment of the distal laceration of the aorta, and the current medical apparatus such as the traditional vascular stent is not suitable or has poor effect after use, and still remains to be solved.

Disclosure of Invention

Based on this, there is a need for a vascular stent and stent system. The blood vessel bracket is reliable in installation, can properly solve the problem of plugging the distal end groove of the aorta, and simultaneously ensures smooth blood supply of the branch blood vessel. The intravascular stent can be applied to minimally invasive treatment, is favorable for reducing the pain and the operation risk of a patient, greatly shortens the operation time of an operator, and improves the success rate of the operation.

The utility model provides a vascular stent, includes support subject, fossil fragments connecting wire and tectorial membrane part, the support subject is the tubular structure, the support subject has the punchhole that a plurality of intervals set up, the support subject includes the exposed section of support and the support tectorial membrane section that relative position set up, tectorial membrane part cover connect in the support tectorial membrane section, the fossil fragments connecting wire connect in the support subject and by the exposed section of support extends to the support tectorial membrane section.

In one embodiment, the stent main body comprises a plurality of annular units which are arranged at intervals and formed by weaving preset metal wires, and a connecting part which connects the plurality of annular units to form the tubular structure, the annular units are provided with the eyelets, and the keel connecting wire is wound on the preset metal wires arranged on the exposed section of the stent.

In one embodiment, the predetermined metal wire is a nitinol wire.

In one embodiment, the number of the keel connecting lines is multiple, and the keel connecting lines are arranged at intervals.

In one embodiment, the keel connecting line is in a straight line shape, a fold line shape or a spiral line shape.

In one embodiment, the axial length of the stent coating section is 20mm to 120 mm;

and/or the radial diameter of the stent coating section is 20 mm-50 mm.

In one embodiment, the axial length of the exposed section of the bracket is 60 mm-160 mm;

and/or the radial diameter of the exposed section of the bracket is 20 mm-50 mm.

In one embodiment, the film member is a polytetrafluoroethylene film or a polyester resin film.

In one embodiment, the radial diameter of the stent body gradually decreases from the exposed section of the stent to the stent graft section, so that the stent body has a conical tubular structure.

In one embodiment, the stent graft segment has the graft member attached to an inner surface of the stent graft segment and/or an outer surface of the stent graft segment.

It is yet another object of the present invention to provide a stent system

A stent system comprises a delivery device and the blood vessel stent, wherein the delivery device is used for matching with the blood vessel stent, and the delivery device is used for delivering the blood vessel stent into an aorta.

The blood vessel support is reliable in installation, can properly solve the problem of plugging the distal end groove of the aorta, simultaneously ensures smooth blood supply of the branch blood vessel, can be applied to minimally invasive treatment, is favorable for reducing the pain and the operation risk of patients, greatly shortens the operation time of an operator, and improves the success rate of the operation.

The integrity of the blood vessel support is improved by arranging the keel connecting line, so that the exposed section of the support has certain torsion property and is more in line with the anatomical structure of a blood vessel, the blood vessel support is reliably installed, the operation quality is favorably improved, and the operation risk is reduced.

Drawings

FIG. 1 is a schematic view of a stent according to an embodiment of the present invention;

FIG. 2 is a schematic view of a bare stent section of the vascular stent shown in FIG. 1;

fig. 3 is a schematic view of the usage state of the blood vessel stent shown in fig. 1.

Description of the reference numerals

10. A vascular stent; 100. a stent body; 110. a bracket exposed section; 120. a stent coating section; 130. presetting a metal wire; 140. an eyelet; 200. a keel connecting line; 300. and (3) a film covering component.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

An embodiment of the present invention provides a vascular stent 10.

Referring to fig. 1, the blood vessel stent 10 includes a stent body 100, a keel connecting line 200 and a film covering component 300.

Referring to fig. 1, the stent body 100 is a tubular structure. The stent body 100 has a plurality of spaced apart eyelets. The stent body 100 includes a stent bare section 110 and a stent covered section 120 disposed in opposing positions.

Referring to FIG. 1, a stent graft segment 120 is shown attached to and covered by a graft component 300.

Referring to fig. 2, the keel connecting line 200 is connected to the stent body 100 and extends from the stent exposed section 110 to the stent covering section 120. The blood vessel support 10 increases the integrity of the blood vessel support 10 by arranging the keel connecting line 200, so that the exposed section 110 of the support has certain torsion property and is more consistent with the anatomical structure of a blood vessel, the blood vessel support 10 is reliably installed, the operation quality is favorably improved, and the operation risk is reduced.

In one embodiment, the stent body 100 includes a plurality of annular units arranged at intervals woven from the preset wires 130 and a connecting part connecting the plurality of annular units in a tubular structure. The annular unit has an aperture. The keel connection wire 200 is wound around the preformed wire 130 of the exposed section 110 of the stent. The stent main body 100 of the blood vessel stent 10 is woven by the preset metal wires 130 to form a plurality of annular units which are arranged at intervals, and the annular units can form eyelets without additional perforation and windowing treatment, so that the blood vessel stent 10 can be suitable for lesion occlusion of an aorta related to branches, and has strong applicability.

The stent main body 100 is made by adopting a preset metal wire 130 weaving process, a plurality of meshes can be naturally formed, the safety of a branch blood vessel is favorably ensured, the aorta is conveniently communicated with the branch artery, the branch blood flow is not influenced, and the original blood flow stability of the aorta is kept.

Further, the connecting part is a film-coated connecting body or a metal connecting body. The stent covered section 120 is directly connected into a closed pipeline structure through a covered connector, or a plurality of annular units are connected into a whole through a metal connector, and then the covered membrane forms a closed pipeline structure, at the moment, the stent exposed section 110 can be connected with the pipeline structure through the metal connector, so that the stent covered section 120 has a plugging function.

In one embodiment, the shape of the annular cells may be diamond-shaped, parallelogram-shaped, wedge-shaped, or the like. Furthermore, the wave structure of the ring unit can be designed into different positive wave numbers, and the connection mode of the ring unit and the ring unit can be a wave crest to wave crest connection mode or a wave crest to wave trough connection mode.

During weaving, the stent covering section 120 and the stent uncovering section 110 can be manufactured and assembled together respectively or can be integrally formed. For example, in one embodiment, the stent covered sections 120 and the stent uncovered sections 110 can be woven independently and then connected together. In another embodiment, the stent cover segment 120 and the stent uncovering segment 110 are integrally formed.

In one embodiment, the preset metal wires 130 have elasticity and memory functions, when the stent 10 is implanted into a blood vessel, the entire stent 10 can be folded, and after the stent is implanted into the blood vessel, the stent body 100 can restore to the original state, so as to fit and support the blood vessel.

In one embodiment, the predetermined metal wire 130 may be made of a memory alloy. Preferably, the pre-set wires 130 are nitinol wires. The preset metal wire 130 is made of nickel-titanium alloy wire, so that the exposed section 110 of the stent has better mechanical property and normal blood flow in blood vessels cannot be influenced.

In one embodiment, the diameter of the wire 130 is preset to be 0.1mm to 1 mm. For example, the diameter of the wire 130 is preset to be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, or other values.

In one embodiment, the number of keel connecting lines 200 is plural. For example, the number of keel connection lines 200 is two, three or another number, etc. When the number of the keel connecting lines 200 is plural, the plural keel connecting lines 200 are arranged at intervals. The keel connecting wires 200 may be woven around the predetermined wires 130 before the exposed sections 110 of the stent are woven, or may be woven around the predetermined wires 130 of the stent body 100 after the entire stent body 100 is woven.

In one embodiment, the keel connection line 200 is linear, dog-leg, or helical. Specifically, the specific shape of the keel connecting line 200 can be designed according to the torsion characteristics required by the exposed section 110 of the stent, so that the exposed section 110 of the stent has better mechanical properties and better conforms to the anatomical characteristics of blood vessels. For example, in one embodiment, the keel connection line 200 is linear; in another embodiment, the keel connection line 200 is dog-legged; in another embodiment, the keel connection 200 is helically shaped.

In one embodiment, the axial length of the stent graft segment 120 is 20mm to 120 mm. Further, the axial length of the stent coating section 120 is 40mm to 80 mm. For example, the stent graft segment 120 may have an axial length of 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, or other values. Where axial length is referred to along the length of fig. 1.

In one embodiment, the stent graft segment 120 has a radial diameter of 20mm to 50 mm. For example, the stent graft segment 120 may have a radial diameter of 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, or other values. Wherein the radial diameter refers to the diameter along a cross section perpendicular to the length direction in fig. 1.

In one embodiment, the axial length of the exposed section 110 of the stent is 60mm to 160 mm. For example, the axial length of the exposed segment 110 of the stent may be 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, or other values.

In one embodiment, the radial diameter of the exposed segment 110 of the stent is 20mm to 50 mm. For example, the radial diameter of the exposed segment 110 of the stent may be 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, or other values.

In one embodiment, the film member 300 is made of polytetrafluoroethylene (ptfe) or polyester resin (PET). Correspondingly, the film member 300 is a polytetrafluoroethylene film or a polyester resin film. For example, in one specific example, the material of the film member 300 is polytetrafluoroethylene, and correspondingly, the film member 300 is a polytetrafluoroethylene film. In another specific example, the material of the film member 300 is a polyester resin film, and correspondingly, the film member 300 is a polyester resin film.

In one embodiment, the radial diameter of the stent body 100 gradually decreases from the stent bare section 110 to the stent covered section 120, so that the stent body 100 has a tapered tubular structure. It should be understood that, in other embodiments, the overall shape of the stent main body 100 may have other structures, and may be set according to actual needs.

In one embodiment, a stent graft component 300 is attached to the inner surface of the stent graft segment 120 and/or the outer surface of the stent graft segment 120.

When the intravascular stent 10 is used, the method comprises the following steps:

referring to fig. 3, after the vascular stent 10 is manually compressed, the vascular stent 10 is delivered into the aorta by using the existing delivery device, wherein the stent covering section 120 is used for blocking the laceration or gap on the aorta, and after the vascular stent 10 recovers to the initial state, the stent exposing section 110 is used for crossing the branch vessels and simultaneously opening the aorta, and at this time, the stent exposing section 110 is disposed at the branch vessels and does not block the communication between the aorta and the branch vessels; since the stent graft segment 120 is covered by the graft member 300, the graft member 300 can be used to seal off a breach or notch in the aorta. Because the exposed section 110 of the stent is provided with the plurality of eyelets 140, the safety of the branch blood vessels is ensured, the communication between the aorta and the branch blood vessels is facilitated, the intima of the aorta is easily attached, the branch blood flow is not influenced, and the original blood flow stability of the aorta is maintained.

It is yet another object of the present invention to provide a stent system.

A stent system comprises a delivery device and the blood vessel stent 10, wherein the delivery device is used for matching with the blood vessel stent 10, and the delivery device is used for delivering the blood vessel stent 10 into an aorta. In fig. 1-3, the stent system and delivery device are not shown.

Example 1

The present embodiment provides a vascular stent 10.

The stent body 100 is a tubular structure. The stent body 100 includes a plurality of annular units woven from a predetermined wire 130 to be arranged at intervals and a connecting portion connecting the plurality of annular units in a tubular structure. The annular unit has an aperture. The wave structure of the ring unit can be designed into different sine wave numbers, and the connection mode of the ring unit and the ring unit can be a wave crest-to-wave crest connection mode or a wave crest-to-wave trough connection mode.

The keel connecting wire 200 is wound around the preformed wires 130 of the exposed section 110 and the preformed wires 130 of the covered section 120 of the stent. The stent main body 100 is made by adopting a preset metal wire 130 weaving process, a plurality of meshes can be naturally formed, the safety of a branch blood vessel is favorably ensured, the aorta is conveniently communicated with the branch artery, the branch blood flow is not influenced, and the original blood flow stability of the aorta is kept.

The stent body 100 includes a stent bare section 110 and a stent covered section 120 disposed in opposing positions.

The graft component 300 covers and is attached to the stent graft segment 120. The stent graft section 120 has a graft member 300 attached to the inner surface of the stent graft section 120 and the outer surface of the stent graft section 120.

During the weaving process, the stent covering section 120 and the stent uncovering section 110 are integrally formed.

The default wire 130 has elasticity and memory function. The predetermined metal wire 130 is made of nitinol. The diameter of the wire 130 is preset to be 0.5 mm.

The number of keel connecting lines 200 is two. The keel connecting lines 200 are spaced apart. The keel connection line 200 is wrapped around the preformed wire 130 prior to weaving of the exposed stent section 110. The keel connecting line 200 is in a zigzag shape.

The axial length of the stent graft segment 120 is 60 mm. Where axial length is referred to along the length of fig. 1. The stent graft section 120 has a radial diameter of 30mm, wherein the radial diameter refers to a diameter along a cross section perpendicular to the length direction in fig. 1.

The axial length of the exposed section 110 of the stent is 100 mm. The radial diameter of the exposed segment 110 of the stent is 40 mm.

The material of the film member 300 is polytetrafluoroethylene. Correspondingly, the film member 300 is a polytetrafluoroethylene film.

The radial diameter of the stent body 100 gradually decreases from the stent bare section 110 to the stent covered section 120, so that the stent body 100 has a tapered tubular structure.

Example 2

The present embodiment provides a vascular stent 10.

The stent body 100 is a tubular structure. The stent body 100 includes a plurality of annular units woven from a predetermined wire 130 to be arranged at intervals and a connecting portion connecting the plurality of annular units in a tubular structure. The annular unit has an aperture. The shape of the annular unit is a rounded quadrangle. The wave structure of the ring unit can be designed into different sine wave numbers, and the connection mode of the ring unit and the ring unit can be a wave crest-to-wave crest connection mode or a wave crest-to-wave trough connection mode.

The graft component 300 covers and is attached to the stent graft segment 120. The stent graft section 120 has a graft member 300 attached to its outer surface.

The default wire 130 has elasticity and memory function. The predetermined metal wire 130 is made of nitinol. The diameter of the wire 130 is preset to be 0.7 mm.

The number of keel connecting lines 200 is one. The keel connection line 200 is wrapped around the preformed wire 130 prior to weaving of the exposed stent section 110. The keel connecting line 200 is linear.

The axial length of the stent graft segment 120 is 50 mm. Where axial length is referred to along the length of fig. 1. The radial diameter of the stent graft segment 120 is 40mm, wherein the radial diameter refers to the diameter along a cross section perpendicular to the length direction in fig. 1.

The axial length of the exposed section 110 of the stent is 90 mm. The radial diameter of the exposed segment 110 of the stent is 30 mm.

The material of the film member 300 is polyester resin. Correspondingly, the film member 300 is a polyester resin film.

In conclusion, the blood vessel support 10 is reliable in installation, can properly solve the problem of plugging the distal end bevel of the aorta, ensures smooth blood supply of the branch blood vessel, can be applied to minimally invasive treatment, is beneficial to reducing the pain of a patient and the surgical risk, greatly shortens the surgical time of a surgeon, and improves the success rate of surgery.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a vascular stent, its characterized in that, includes support subject, fossil fragments connecting wire and tectorial membrane part, the support subject is the tubular structure, the support subject has the punchhole that a plurality of intervals set up, the support subject includes the exposed section of support and the support tectorial membrane section that relative position set up, tectorial membrane part cover and connect in the support tectorial membrane section, the fossil fragments connecting wire connect in the support subject and by the exposed section of support extends to the support tectorial membrane section.

2. The blood vessel support as claimed in claim 1, wherein the support body comprises a plurality of annular units woven by preset metal wires and arranged at intervals, and a connecting part connecting the plurality of annular units into the tubular structure, the annular units are provided with the eyelets, and the keel connecting wire is wound around the preset metal wires arranged on the exposed section of the support.

3. The vascular stent of claim 2, wherein the pre-set wire is nitinol wire.

4. The blood vessel support according to any one of claims 1 to 3, wherein the number of the keel connecting lines is multiple, and the plurality of keel connecting lines are arranged at intervals;

and/or the keel connecting line is in a linear shape, a fold line shape or a spiral line shape.

5. The blood vessel support of any one of claims 1 to 3, wherein the axial length of the stent coating section is 20mm to 120 mm;

and/or the radial diameter of the stent coating section is 20 mm-50 mm.

6. The blood vessel support according to any one of claims 1 to 3, wherein the axial length of the exposed section of the support is 60mm to 160 mm;

7. The vascular stent according to any one of claims 1 to 3, wherein the covering member is a polytetrafluoroethylene film or a polyester resin film.

8. The blood vessel stent of any one of claims 1 to 3, wherein the radial diameter of the stent main body is gradually reduced from the exposed section of the stent to the stent tectorial section, so that the stent main body is in a conical tubular structure.

9. The blood vessel support according to any one of claims 1 to 3, wherein the membrane covering component is connected to the inner surface of the support membrane covering section and/or the outer surface of the support membrane covering section.

10. A stent system comprising a delivery device for engaging with a stent of a blood vessel according to any one of claims 1 to 9 and a stent of a blood vessel according to any one of claims 1 to 9 for delivering the stent of the blood vessel into an aorta.