CN111297515A

CN111297515A - Aorta covered stent and system

Info

Publication number: CN111297515A
Application number: CN202010204054.5A
Authority: CN
Inventors: 潘湘斌; 徐靖
Original assignee: Shijiazhuang Dizhong Medical Device Technology Co ltd
Current assignee: Shijiazhuang Dizhong Medical Device Technology Co ltd
Priority date: 2020-03-21
Filing date: 2020-03-21
Publication date: 2020-06-19

Abstract

The invention belongs to the technical field of medical instruments, and provides an aorta tectorial membrane support which comprises a first support, tectorial membranes and pre-opening membranes, wherein the tectorial membranes surround and cover the first support, the pre-opening membranes are arranged on the tectorial membranes, and the pre-opening membranes are separated from the tectorial membranes under the action of pressure. Through the technical scheme, the problems that in the prior art, the operation difficulty is very high, the support installation risk is too large, and the long-term treatment effect is unknown are solved.

Description

Aorta covered stent and system

Technical Field

The invention belongs to the technical field of medical instruments, and relates to an aorta covered stent and a system.

Background

With the aging population, the incidence of cardiovascular diseases such as 'aortic aneurysm', 'aortic dissection' and the like is higher and higher. The implantation of aortic stents is currently the most effective method for treating cardiovascular diseases. The main coverage area of the stent on the market is on the descending aorta behind the aortic arch, and the stent is installed to ensure that the blood supply of three main branch vessels on the aortic arch is not blocked, which cannot be realized by a stanford A-type dissection common aortic tectorial membrane stent. Some covered stents adopt a windowing technology, a chimney technology or a covered stent with branches to solve the problems, but the effects are not ideal, and the main defects are that the operation difficulty is very high, the stent installation risk is too large, and the long-term treatment effect is unknown, so the technical problem can not be solved all the time.

Disclosure of Invention

The invention provides an aorta tectorial membrane stent and a system, which solve the problems of high operation difficulty, too large stent installation risk and unknown long-term treatment effect in the prior art.

The technical scheme of the invention is realized as follows:

an aorta covered stent comprises

A first support frame and a second support frame,

a covering membrane, which is covered on the first stent in a surrounding way,

the pre-opening pore membranes are arranged on the covering membranes in a plurality, and are separated from the covering membranes under the action of pressure.

As a further technical proposal, the method also comprises

A plurality of flow holes which are continuously arranged on the coating film, are respectively and correspondingly arranged in the flow holes and are connected with the edges of the flow holes,

an auxiliary groove disposed at a junction of the pre-perforated membrane and the flow hole.

As a further technical solution, the depth of the auxiliary groove accounts for more than 50% of the thickness of the coating.

As a further technical scheme, the flow holes are hexagonal.

As a further technical scheme, the first stent is a cylindrical frame formed by a plurality of hexagonal frames, the size of each hexagonal frame is the same as that of the flow hole, and the first stent is arranged inside the coating.

As a further technical proposal, the method also comprises

The second support is in a single-circle wave shape and is arranged at the near end of the first support.

As a further technical solution, the first scaffold is seamless.

An aorta tectorial membrane system comprises an aorta tectorial membrane stent,

also comprises

A balloon for placement within the cover to compress the pre-fenestrated membrane,

a filter disposed within the branch vessel to recover the detached pre-perforated membrane.

The working principle and the beneficial effects of the invention are as follows:

1. in the invention, after the aorta covered stent is placed at the aorta with the branch blood vessels, pressure is applied to the inside of the covered membrane, and the pre-opening membrane blocked on the branch blood vessels falls off from the covered membrane to form openings in the branch blood vessels after being subjected to a certain radial compression force, so that the aorta is connected with the branch blood vessels by opening the pre-opening membrane pre-pressed on the branch blood vessels while the stent and the covered membrane are kept to be attached to the inner walls of the blood vessels.

The aorta covered stent of the invention overcomes the defect that the traditional covered stent can not cover the branch blood vessels aiming at the condition that the branch blood vessels exist in the aortic vascular disease range. The position of the covered stent does not need to be adjusted according to the branch blood vessels when the covered stent is released, so that the use flexibility of the stent is increased, and the operation difficulty of a doctor is reduced. When the release is carried out at the branch blood vessel, the blood flow in the blood vessel is slightly influenced, the unknown risk injury to the human body is reduced, and the operation risk is reduced. The aorta covered stent is no longer limited to the condition of branched blood vessels, and the treatment range of the product is wider. So that the whole lesion area on the aorta can be covered. The structure can also reduce the probability of fold generation while ensuring the strength of the covered stent, and the product has better long-term treatment effect.

2. The connection part of the pre-opening pore membrane and the flow pore is provided with the auxiliary groove, namely, the coating membrane is continuously pre-pressed in the manufacturing process, so that a plurality of continuous pre-opening pore membranes are formed, the auxiliary groove is formed between the pre-opening pore membranes and the coating membrane, so that the connection between the pre-opening pore membranes and the coating membrane is weak, when the pre-opening pore membranes are pressed at the branch blood vessel, the bottom of the auxiliary groove, namely the connection part of the pre-opening pore membranes and the coating membrane is broken, the pre-opening pore membranes are separated from the coating membrane, and the flow pore is formed on the coating membrane, so that the connection of the main artery and the branch blood vessel is realized.

3. The depth of the auxiliary groove is more than 50% of the thickness of the covering film, so that the thickness of the bottom of the auxiliary groove is moderate, when the pre-opening film is pressed at the branch blood vessel, the bottom of the auxiliary groove, namely the joint of the pre-opening film and the covering film, can be broken, and the smooth communication between the aorta and the branch blood vessel is ensured.

4. The flow holes are hexagonal, the hexagons are the same in size, the compression of the support is facilitated, the processing is also facilitated, on the other hand, the continuous arrangement of the hexagons is beneficial to reducing the arrangement gap between every two flow holes, the arrangement is reasonable, and the blockage of the circulation in the blood vessel is avoided.

5. The first support is a cylindrical frame formed by surrounding a plurality of hexagonal frames, is favorable for matching with the pre-perforated membrane, ensures the strength of the support, reduces the probability of generating folds, and is reasonable in design, safe and reliable.

6. The second support is in a single-ring wave shape, is arranged at the near end of the first support, is favorable for being more attached to a blood vessel, is convenient to assemble with a conveying system, and can obtain enough near-end and far-end anchoring areas without blocking main branch blood vessels. As used herein, the proximal end of the stent refers to the end closer to the heart and the distal end refers to the end farther from the heart.

7. The structure without the sewing line can effectively prevent the occurrence of IV-type internal leakage and ensure the safety.

8. According to the invention, after the covered stent is released at the main artery with the branch blood vessel, the covered membrane blocked on the branch blood vessel can be separated from the covered stent along the indentation through the compression effect of the self-adaptive saccule, and the covered residual pieces falling off the branch blood vessel are recovered through the filter device to prevent the blood vessel from being blocked. The blood flow in the blood vessel is slightly influenced, the unknown risk injury to the human body is reduced, and the operation risk is reduced.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic sectional view of the structure in the direction A of FIG. 2;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3;

FIG. 5 is a schematic view of the aortic stent graft system of the present invention;

FIG. 6 is an enlarged schematic view of portion B of FIG. 5;

FIG. 7 is a schematic view of a first bracket structure according to the present invention;

in the figure: 1-first support, 2-coating film, 3-flow hole, 4-pre-opening hole film, 5-auxiliary groove, 6-second support, 7-balloon and 8-filter.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figures 1-4 and 7, the invention provides an aorta covered stent, which comprises

The first support (1) is provided with a plurality of support frames,

a covering film 2, the covering film 2 is covered on the first stent 1 in a surrounding way,

the pre-perforated membranes 4 are arranged on the coating film 2, and the pre-perforated membranes 4 are separated from the coating film 2 under the action of pressure.

After putting aorta tectorial membrane support into the aorta department that has the branch blood vessel in this embodiment, exert pressure in the tectorial membrane 2, the trompil membrane 4 of pre-opening that blocks up on the branch blood vessel can drop to the branch blood vessel after receiving certain radial compressive force and form the trompil from tectorial membrane 2 to the realization is when keeping support and tectorial membrane 2 and the laminating of blood vessel inner wall, makes aorta and branch blood vessel be connected through opening the pre-opening membrane 4 of pre-pressing on the branch blood vessel.

The aorta covered stent of the embodiment overcomes the defect that the traditional covered stent 2 can not cover the branch vessels aiming at the condition that the branch vessels exist in the aortic vascular disease range. The position of the stent covered with the film 2 does not need to be adjusted according to the branch blood vessel when the stent is released, so that the use flexibility of the stent is increased, and the operation difficulty of a doctor is reduced. When the release is carried out at the branch blood vessel, the blood flow in the blood vessel is slightly influenced, the unknown risk injury to the human body is reduced, and the operation risk is reduced. The aorta covered stent is no longer limited to the condition of branched blood vessels, and the treatment range of the product is wider. So that the whole lesion area on the aorta can be covered. The structure can also reduce the probability of fold generation while ensuring the strength of the stent covered with the membrane 2, and the long-term treatment effect of the product is better.

Further, also comprises

A plurality of flow holes 3, the flow holes 3 are continuously arranged on the coating film 2, are respectively and correspondingly arranged in the flow holes 3 and are connected with the edges of the flow holes 3,

and the auxiliary groove 5 is arranged at the joint of the pre-perforated membrane 4 and the flow hole 3.

The junction of pre-opening pore membrane 4 and mobile pore 3 is provided with supplementary groove 5 in this embodiment, carry out continuous pre-compaction to tectorial membrane 2 in making promptly, thereby form the continuous pre-opening pore membrane 4 of a plurality of, and form supplementary groove 5 between these pre-opening pore membrane 4 and the tectorial membrane 2, it is relatively weak to make the connection between pre-opening pore membrane 4 and the tectorial membrane 2, thereby make pre-opening pore membrane 4 receive when branch vessel department oppresses, the bottom of supplementary groove 5 is the junction fracture of pre-opening pore membrane 4 and tectorial membrane 2 promptly, make pre-opening pore membrane 4 come off from tectorial membrane 2, form mobile pore 3 on the tectorial membrane 2, thereby realize the connection of aorta and branch vessel, and reasonable in design, through the experiment, can effectively realize the intercommunication effect, the operation degree of difficulty is little, the installation risk is little.

Further, the depth of the auxiliary groove 5 accounts for more than 50% of the thickness of the coating film 2.

The depth of the auxiliary groove 5 in the embodiment is more than 50% of the thickness of the covering film 2, so that the thickness of the bottom of the auxiliary groove 5 is moderate, when the pre-opening film 4 is pressed at the branch blood vessel, the bottom of the auxiliary groove 5, namely the joint of the pre-opening film 4 and the covering film 2, can be broken, and the smooth communication between the aorta and the branch blood vessel is ensured.

Further, the flow holes 3 are hexagonal.

The flow hole 3 is the hexagon in this embodiment, and the hexagonal size is the same, the compression of the support of being convenient for, also the processing of being convenient for, on the other hand, hexagonal is provided with in succession and does benefit to and reduces the clearance that sets up between every flow hole 3, and reasonable layout sets up, is favorable to avoiding hindering the circulation in the blood vessel.

Further, the first stent 1 is a cylindrical frame surrounded by a plurality of hexagonal frames, the size of the hexagonal frames is the same as that of the flow holes 3, and the first stent 1 is arranged inside the coating film 2.

First support 1 is the cylindrical frame that is enclosed by a plurality of hexagon frames in this embodiment, is favorable to cooperateing with trompil membrane 4 in advance, and the probability that the fold produced is reduced in the time of guaranteeing support intensity to the laminating blood vessel, reasonable in design, safe and reliable.

Further, also comprises

And a second stent 6, wherein the second stent 6 is in a single-circle wave shape, and the second stent 6 is arranged at the proximal end of the first stent 1.

In this embodiment, the second stent 6 is in a single-loop wave shape, and the second stent 6 is arranged at the near end of the first stent 1, so that the second stent is beneficial to being more attached to a blood vessel, is convenient to assemble with a conveying system, and can obtain enough near-end and far-end anchoring areas without blocking a main branch blood vessel. As used herein, the proximal end of the stent refers to the end closer to the heart and the distal end refers to the end farther from the heart.

Further, the first stent 1 is seamless.

The structure of no suture in this embodiment can effectively prevent to leak in the IV type and take place, guarantees the security.

As shown in fig. 5-6, the present invention also provides an aortic stent graft 2 system, comprising an aortic stent graft,

also comprises

A balloon 7, the balloon 7 is arranged in the first bracket 1 to press the pre-perforated membrane 4,

and a filter 8, wherein the filter 8 is provided in the branch vessel to recover the detached pre-perforated membrane 4.

In the embodiment, after the stent covered with the membrane 2 is released at the main artery with the branch blood vessel, the membrane 2 blocked on the branch blood vessel can be separated from the stent covered with the membrane 2 along the indentation by the compression action of the self-adaptive saccule 7, and the residual pieces of the membrane 2 falling off the branch blood vessel are recovered by the filter 8 device to prevent the blockage of the blood vessel. The blood flow in the blood vessel is slightly influenced, the unknown risk injury to the human body is reduced, and the operation risk is reduced.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An aorta tectorial membrane stent is characterized by comprising

A first support (1) for supporting the first support,

a coating film (2), wherein the coating film (2) is coated on the first bracket (1) in a surrounding way,

pre-perforated membrane (4), pre-perforated membrane (4) is for setting up a plurality ofly on tectorial membrane (2), pre-perforated membrane (4) breaks away from under the effect of pressure tectorial membrane (2).

2. The aortic stent graft as set forth in claim 1, further comprising

A plurality of flow holes (3) which are continuously arranged on the coating film (2), are respectively and correspondingly arranged in the flow holes (3) and are connected with the edges of the flow holes (3),

an auxiliary groove (5), the auxiliary groove (5) being provided at a junction of the pre-perforated membrane (4) and the flow hole (3).

3. An aortic stent graft as claimed in claim 2, wherein the depth of the auxiliary channel (5) is greater than 50% of the thickness of the graft (2).

4. An aortic stent graft as claimed in claim 2, wherein the flow holes (3) are hexagonal.

5. An aortic stent graft as claimed in claim 4, wherein the first stent (1) is a cylindrical frame surrounded by a plurality of hexagonal frames of the same size as the flow holes (3), the first stent (1) being arranged inside the stent graft (2).

6. The aortic stent graft as set forth in claim 1, further comprising

The second support (6), second support (6) are single circle wave form, second support (6) set up in the near-end of first support (1).

7. An aortic stent graft as claimed in claim 1, wherein the first stent (1) is seamless.

8. An aorta graft system, comprising the aorta graft stent of any one of claims 1 to 7,

also comprises

A balloon (7), the balloon (7) being arranged in the covering membrane (2) to press the pre-perforated membrane (4),

a filter (8), wherein the filter (8) is disposed in a branch vessel and recovers the detached pre-perforated membrane (4).