CN112336497A

CN112336497A - Aortic root stent system

Info

Publication number: CN112336497A
Application number: CN202011504274.6A
Authority: CN
Inventors: 陈宏伟; 陈欣榆
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-02-09

Abstract

The aortic root stent system comprises an aortic stent and a sinus anchoring stent, wherein the aortic stent is correspondingly arranged on the inner wall of an ascending aorta, the sinus anchoring stent is attached to the inner wall of an aortic sinus and extends downwards from the junction of sinus canals, the bottom of the sinus anchoring stent extends inwards to form a plurality of coronary valve stents attached to the aortic sinus, the peripheral surfaces of the plurality of coronary valve stents form a garlic valve-shaped structure, the top ends of the inner sides of the coronary valve stents correspondingly extend to the outer side of a valve ring, and the tail ends of all the coronary valve stents form an opening for free movement of valve leaflets. The aortic root stent system and the coronary valve stent can increase the anchoring area of the whole sinus anchoring stent in the aortic valve, are firmly positioned, are not easy to displace under the impact of blood flow, and improve the stability of the aortic root anchoring system in the aortic valve.

Description

Aortic root stent system

Technical Field

The invention relates to the field of implantable blood vessels, in particular to an aortic root stent system.

Background

The application publication number of CN 105287051a, chinese patent invention discloses a prosthetic aortic valve annulus system implanted via peripheral artery, comprising a valve annulus support at distal end and an anchoring foot at proximal end, wherein the valve annulus support is fixedly connected with the anchoring foot, and the valve annulus support is tubular and has a grid structure; the anchoring foot is arranged along the periphery of the annular support and is used for embedding into a cavity structure at the root part of the ascending aorta so as to fix the artificial aortic annular system, and the artificial aortic annular system can be changed between a first radial expansion state and a second radial contraction state; the annular support is provided with a first part and a second part, the first part is located at the far-end, the second part is located at the near-center end, the anchoring foot is fixedly connected with the second part, in the axial length, the length of the first part is larger than that of the second part, when the annular support is in the first form, the radial section radius of the first part is gradually reduced from the far-end to the near-center end, the radial section radius of the second part is equal to the minimum radial section radius of the first part, and when the anchoring foot is in the first form, the plane where the anchoring foot is located and the axial direction of the annular support form an included angle of 20-45 degrees.

However, the proximal end of the above patent is positioned only by embedding the anchoring leg into the lumen of the root of the ascending aorta, and the anchoring area is small, the positioning is not firm, and the proximal end is easily displaced by blood flow impact. Moreover, the patent can only be used for treating calcified simple aortic regurgitation, has small application range and cannot be applied to treatment of ascending aortic dissection and aortic sinus disease. To this end, we provide an active root cradle system.

Disclosure of Invention

The invention provides an aortic root stent system, which aims to solve the defects that the existing aortic valve ring is positioned only by an anchoring foot, the anchoring area is small, the positioning is not firm, the displacement is easy to occur and the like.

The invention adopts the following technical scheme:

the utility model provides an aortic root support system, includes aortic stent and sinus anchor support, the ascending aorta inner wall is located to the aortic stent correspondence, sinus anchor support corresponds to paste to lean on the inner wall of aortic sinus, by sinus pipe juncture downwardly extending, and the bottom of this sinus anchor support is extended to the inboard and is formed a plurality of and correspond the canopy support of pasting on the aortic sinus, and is a plurality of the outer peripheral face of canopy support forms garlic clove column structure, the inboard top of canopy support corresponds and extends to the valve ring outside, and the end of all canopy supports forms an opening that supplies leaflet free activity.

Preferably, the sinus anchor stent is a bare stent, and the sinus anchor stent may be provided with a notch corresponding to the coronary artery opening or not provided with a notch.

Furthermore, a second coating is arranged on the outer peripheral surface or the inner peripheral surface of the sinus anchoring stent above the coronary artery.

Furthermore, a second coating is arranged on the outer peripheral surface or the inner peripheral surface of the whole sinus anchoring stent, and a through hole corresponding to the coronary artery opening is formed in the second coating.

Furthermore, every two adjacent coronary artery stents are intersected to form a convex ridge, an annulus anchoring stent is arranged on the top surface of the convex ridge or above the convex ridge, and a third covering film is arranged on the annulus anchoring stent, is tubular or crown-shaped and is connected with the second covering film at the opening.

Preferably, the number of the crown valve supports is three, a concave curve is formed at the top end of the inner side of each crown valve support, and the three concave curves are connected in sequence to form the opening.

Further, the projection of the opening in the vertical plane is a triangular, approximately triangular or petal-shaped structure.

Further, the aortic stent is a bare stent with a length of between 0-16 cm.

Further, the aortic stent is provided with a first covering membrane, and the length of the first covering membrane is 0-7 cm.

Further, the sinus anchoring stent is woven by a medical alloy stent to form a grid-shaped structure.

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

1. the aortic root stent system comprises an aortic stent and is additionally provided with a sinus anchoring stent correspondingly attached to the inner wall of the aortic sinus, the bottom of the sinus anchoring stent extends inwards to form a plurality of coronary valve stents correspondingly attached to the aortic sinus, the peripheral surfaces of the coronary valve stents form garlic valve shapes, and the top ends of the inner sides of the coronary valve stents are correspondingly embedded outside valve rings, so that the anchoring area of the whole sinus anchoring stent in the aortic valve is enlarged, the positioning is firm, the aortic root anchoring stent is not easy to displace under the impact of blood flow, the stability of the aortic root anchoring system in the aortic valve is improved, the sinus anchoring stent can prevent the coronary artery from being blocked, and the blood supply of the coronary artery is ensured.

2. When the aortic stent and the sinus anchoring stent are both of a bare stent structure, the aortic stent and the sinus anchoring stent can be used for treating a part of light patients in an A-type aortic dissection, so that an inner membrane torn from the dissection is reset to block a laceration, and the purpose of eliminating the laceration is achieved; can also be used for treating only one aortic valve junction avulsion or aortic sinus slight affection in the type A aortic dissection.

3. When the aortic stent and the sinus anchoring stent are both provided with the covering films, the aortic stent and the sinus anchoring stent can be used for treating ascending aorta interlayers and affected sinus lesions, and the application range of the aortic root stent system is widened.

4. The aortic root stent system is characterized in that the annular anchoring stent is additionally arranged on or above the ridge formed by the intersection of every two coronary stents, and the annular anchoring stent is provided with the third covering film which is connected with the second covering film at the opening, so that an anchoring carrier can be provided for the subsequent aortic interventional valve operation, and favorable conditions are created for the treatment of aortic insufficiency.

Drawings

FIG. 1 is a front view of an aortic root stent system according to an embodiment of the present invention.

FIG. 2 is a schematic view of the aortic root stent system deployed in the ascending aorta according to an embodiment of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

FIG. 4 is a front view of a second aortic root stent system according to an embodiment of the present invention.

FIG. 5 is a schematic view of the aortic root stent system released in the ascending aorta according to the second embodiment of the present invention.

FIG. 6 is a front view of a three aortic root stent system according to an embodiment of the present invention.

FIG. 7 is a front view of a four aortic root stent system according to an embodiment of the present invention.

Fig. 8 is a sectional view taken in the direction B-B in fig. 7.

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 aortic root stent system, referring to fig. 1 and 2, includes an aortic stent 10 and a sinus anchor stent 20. The aortic stent 10 is provided with a first covering membrane 11, and the aortic stent 10 is correspondingly attached to the inner wall of the ascending aorta 1 and extends from the inner wall of the distal end of the ascending aorta 1 to the inner wall of the sinotubular junction 2. When a certain part of the ascending aorta 1 has a dissection lesion, a corresponding part of the aorta stent 10 is provided with a first covering film 11, the surrounding part is also correspondingly provided with the first covering film 11 as an anchoring area, and other parts of the aorta stent 10 can be provided with the first covering film 11 or can not be provided with the first covering film 11.

Referring to fig. 1 to 3, a sinus anchor stent 20 is further fixedly disposed at the proximal bottom of the aortic stent 10, and the sinus anchor stent 20 is correspondingly abutted against the inner wall of the aortic sinus 3 and extends downward from the sinotubular junction 2. The sinus part anchoring support 20 has several coronary valve supports 21 attached to the sinus of aorta at the bottom, garlic-shaped structures formed on the outer peripheral surfaces of the coronary valve supports 21, and openings 22 for the valve leaflets to move freely formed at the ends of the coronary valve supports 21, wherein the top ends of the inner sides of the coronary valve supports 21 correspondingly extend to the outer side of the valve annulus 4.

In the embodiment, three crown valve supports 21 are shown, and the top end of the inner side of each crown valve support 21 forms a concave curve, preferably a concave arc. The three curves are connected in sequence to form an opening 22, and the projection of the opening 22 in a vertical plane is a triangle, an approximate triangle or a petal-shaped structure.

The sinus anchor stent 20 of the present embodiment is a bare stent structure, and the sinus anchor stent 20 may be specifically woven by using stainless steel alloy to form a grid structure.

The embodiment is mainly used for treating ascending aortic dissection diseases, the sinus anchoring stent enlarges the anchoring area of the whole aortic root anchoring system in the aortic valve, the aortic root anchoring system is not easy to displace under the impact of blood flow, and the stability of the aortic root anchoring system in the aortic valve is improved.

Example two

Referring to fig. 4 and 5, the aortic root stent system of the present embodiment also includes an aortic stent 10 and a sinus anchor stent 20. The aortic stent 10 is correspondingly attached to the inner wall of the ascending aorta 1 and extends from the inner wall of the distal end of the ascending aorta 1 to the inner wall of the sinotubular junction 2, and the aortic stent 10 is provided with a first covering film. The sinus anchoring stent 20 is correspondingly attached to the inner wall of the aortic sinus 3 and extends downwards from the sinotubular junction 2, a plurality of coronary valve stents 21 correspondingly attached to the aortic sinus are formed at the bottom of the sinus anchoring stent 20, and a garlic-shaped structure is formed on the outer peripheral surfaces of the plurality of coronary valve stents 21.

The main differences between this embodiment and the first embodiment are: the aortic stent 10 is a stent graft provided with a first stent graft 11, and the outer circumferential surface or inner circumferential surface portion of the sinus anchor stent 20 is provided with a second stent graft 23. The second coating 23 is only arranged on the sinus anchor stent 20 above the coronary artery opening 5, but the second coating is not arranged on the coronary artery opening 5 and the sinus anchor stent below the coronary artery opening 5, and because the coronary artery opening 5 and the sinus anchor stent below the coronary artery opening are in a bare stent structure, a through hole does not need to be formed in a position corresponding to the coronary artery opening, the sinus anchor stent 20 is convenient to release in the sinus, and the through hole does not need to be aligned with the coronary artery opening.

EXAMPLE III

Referring to fig. 6, the aortic root stent system of the present embodiment also includes an aortic stent 10 and a sinus anchor stent 20, and a plurality of coronary stents 21 are formed at the bottom of the sinus anchor stent 20 and are correspondingly attached to the aortic sinus. The main differences between the present embodiment and the second embodiment are: when the sinus lesion sandwich of the present embodiment occurs below the coronary artery opening, the sinus anchor stent 20 of the present embodiment has to be provided with the second covering film 23 corresponding to the coronary artery opening, and the second covering film 23 has to be provided with the through hole 24 corresponding to the coronary artery opening to ensure the normal supply of the blood flow of the coronary artery.

Example four

Referring to fig. 7 and 8, the aortic root stent system of the present embodiment also includes an aortic stent 10 and a sinus anchor stent 20, a plurality of coronary valve stents 21 correspondingly attached to the aortic sinus are formed at the bottom of the sinus anchor stent 20, a second covering membrane 23 is also provided at the sinus anchor stent 20 corresponding to the coronary artery opening, and the covering membrane extends to the opening surrounded by the top end of the inner side of each coronary stent 21. The main differences between this embodiment and the third embodiment are: every two adjacent coronary artery stents 21 are intersected to form a convex ridge 211, the top surface of the convex ridge 211 is provided with an annular anchoring stent 24, the annular anchoring stent is provided with a third covering film 25, and the third covering film 25 is tubular or crown-shaped and is connected with the second covering film 23 at the opening 22 to prevent blood from leaking inwards.

The annular anchoring stent 24 may also be positioned just above the top surface of the ridge 211. The annular anchoring stent 24 may be a circular ring-shaped structure or a tubular structure. The annular anchoring bracket 24 added in the embodiment is mainly used as an anchoring carrier for aortic interventional valve operation, and creates favorable conditions for the treatment of aortic insufficiency.

In the above embodiments, the sinus anchor stent 20 portion with the second covering membrane may be woven from a stainless steel alloy to form a lattice structure, or may be a plurality of support ring structures, while the sinus anchor stent 20 portion without the second covering membrane may be a lattice structure.

The aortic stent, the sinus anchoring stent and the valve ring anchoring stent of the invention can all adopt medical stainless steel alloy 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 first coating film and the second coating film can be polytetrafluoroethylene films, polyester fiber films, polyamide films or polypropylene films.

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. An aortic root stent system comprises an aortic stent and a sinus anchoring stent, wherein the aortic stent is correspondingly arranged on the inner wall of an ascending aorta, and the aortic root stent system is characterized in that: sinus anchor support corresponds to paste on the inner wall in aortic sinus, by sinus pipe juncture downwardly extending, and the bottom of this sinus anchor support inwards extends to form a plurality of and corresponds the canopy valve support of pasting on the aortic sinus, and is a plurality of the outer peripheral face of canopy valve support forms garlic clove column structure, the inboard top of canopy valve support corresponds and extends to the valve ring outside, and the end of all canopy valve supports forms an opening that supplies leaflet free activity.

2. The aortic root stent system as set forth in claim 1, wherein: the sinus anchor stent is a bare stent.

3. The aortic root stent system as set forth in claim 2, wherein: the sinus anchoring stent is provided with a notch corresponding to the coronary artery opening.

4. The aortic root stent system as set forth in claim 1, wherein: and a second coating is arranged on the outer peripheral surface or the inner peripheral surface of the sinus anchoring stent above the coronary artery.

5. The aortic root stent system as set forth in claim 1, wherein: and a second coating is arranged on the outer peripheral surface or the inner peripheral surface of the whole sinus anchoring stent, and a through hole corresponding to the coronary artery opening is formed in the second coating.

6. The aortic root stent system as set forth in claim 5, wherein: every two adjacent coronary artery stents are intersected to form a convex ridge, an annulus anchoring stent is arranged on the top surface of the convex ridge or above the convex ridge, and a third covering film is arranged on the annulus anchoring stent, is tubular or crown-shaped and is connected with the second covering film at the opening.

7. The aortic root stent system as set forth in claim 1, wherein: the number of the crown valve supports is three, a concave curve is formed at the top end of the inner side of each crown valve support, and the three concave curves are connected in sequence to form the opening.

8. The aortic root stent system as set forth in claim 7, wherein: the projection of the opening in the vertical plane is a triangular, approximately triangular or petal-shaped structure.

9. The aortic root stent system as set forth in claim 1, wherein: the aortic stent is a bare stent, and the length of the aortic stent is between 0 cm and 16 cm.

10. The aortic root stent system as set forth in claim 1, wherein: the aortic stent is provided with a first covering membrane, and the length of the first covering membrane is 0-7 cm.