CN215307028U

CN215307028U - Branch type aorta artificial stent

Info

Publication number: CN215307028U
Application number: CN202120363746.4U
Authority: CN
Inventors: 周小彪
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-12-28
Anticipated expiration: 2031-02-08

Abstract

The utility model relates to a branch type aorta artificial stent, which comprises an aorta stent and at least one branch aorta stent, wherein the aorta stent comprises a stent main body and a covering film sewed on the stent main body, a branch connecting area is arranged on the covering film, and the branch connecting area is not sewed with the covering film; the branch artery stent is connected to a branch connection area of the covering membrane, a folding portion is arranged on the branch connection area, and the folding portion is located on the periphery of the branch artery stent.

Description

Branch type aorta artificial stent

Technical Field

The utility model relates to the field of medical instruments, in particular to a branched artificial aortic stent.

Background

Aortic aneurysms and aortic dissections are aortic pathologies that are seriously life-threatening to the patient. If not treated in time, the tumor mass of the aortic aneurysm will grow, leading to rupture and death; the aortic dissection is likely to rupture and die, and meanwhile, the aortic dissection can cause branch artery ischemia, so that ischemia of organs such as brain, spinal cord, heart, liver and kidney, limbs and the like occurs and serious complications occur, such as cerebral infarction, paraplegia, acute liver and kidney function injury, lower limb dysfunction and the like. In some cases, aortic aneurysms and aortic dissections require emergency surgical treatment.

With the development of intraluminal techniques, Thoracic Aortic intraluminal Repair (TEVAR) has become the primary method of treatment for partial Thoracic Aortic aneurysms and Aortic dissections. The stent is placed in the thoracic aorta, aortic lesions are isolated outside the stent, and blood flow is constrained to completely pass through the stent, so that the aims of isolating the lesions and protecting blood vessels are fulfilled. At present, various aortic stent vessels exist at home and abroad, and in order to ensure the firm fixation of the stent in the vessel and prevent blood from leaking out of the stent from the proximal end of the stent, the proximal end of the currently used aortic stent vessel needs an anchoring area of at least 15 mm. Therefore, when the aortic aneurysm or aortic dissection is adjacent to or affects the branch aorta, the branch aorta can be blocked to different degrees in the current stent on the market, which affects the blood perfusion, and even the aortic aneurysm or aortic dissection cannot be treated by the intracavity repair technology.

The method for windowing the aorta branch stent or the aorta stent tectorial membrane which is specially customized at home and abroad comprises the following steps: according to the specific anatomical condition of a patient, manufacturing a side hole on a tubular aortic stent blood vessel, wherein the position of the side hole corresponds to the position of a branch artery; in the operation, when the aorta stent blood vessel is implanted into the aorta lesion part, the side hole is aligned to the branch artery at the same time, so that the blood flow of the branch artery is ensured to be smooth, and a small stent is implanted into the branch artery. However, this approach has a number of disadvantages: firstly, the stent vessel must be specially tailored to the specific anatomical morphology of the patient and cannot be mass produced; secondly, the customized stent is long in use and cannot be used for emergency surgery, and the integrity and the service life of the stent can be damaged by windowing the aortic stent covered membrane; third, when a customized stent with a side hole or a fenestrated stent is released in vivo, the side hole must be aligned with an affected branch artery, and if deviation occurs, the side hole may cause complications related to blood flow obstruction, occlusion, endoleak and the like of the branch artery, and the stent is seriously life-threatening.

To above-mentioned problem, patent publication number is CN1026411164A, and the patent application of publication date for 2012, 08 month 22 days discloses a branch type aorta stent vascular system, and it includes an aorta stent blood vessel and three branch artery stent blood vessels, the middle section of aorta stent blood vessel is equipped with the depressed part, the depressed part is equipped with three side opening, three branch artery stent blood vessels split charging are in three side opening. The branch type aortic stent vascular system can isolate aortic lesions affecting the aortic arch part and ascending aorta, can reconstruct the blood flow of branch arteries, avoids customizing stents, and can be produced in batch and used for emergency operations. However, when the branched aortic stent vascular system is used, the aortic stent blood vessels need to be delivered to corresponding positions of the aorta through the guide wires, and then the three branched aortic stent blood vessels are delivered into each branched artery through the aortic stent blood vessels one by using the guide wires. This undoubtedly increases the difficulty of the surgery, makes the surgical operation more complicated, and increases the surgical time and surgical risks.

In view of the above, the present inventors have made extensive and intensive studies to solve the above-mentioned problems, and as a result, have conducted intensive experiments.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a branch type aorta artificial stent which can simplify operation and reduce operation risk.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a branch type aorta artificial stent comprises an aorta stent and at least one branch aorta stent, wherein the aorta stent comprises a stent main body and a covering film sewed on the stent main body, a branch connecting area is arranged on the covering film, and the branch connecting area is not sewed with the covering film; the branch artery stent is connected to a branch connection area of the covering membrane, a folding portion is arranged on the branch connection area, and the folding portion is located on the periphery of the branch artery stent.

The folding part is a folding ring, and at least one folding ring is arranged on the periphery of each branch artery stent.

The artificial stent comprises more than two branch artery stents, and the folding ring at the periphery of each branch artery stent is not intersected with the folding rings at the periphery of other branch artery stents.

The aorta support is provided with a front section, a middle section and a rear section, the rear section is used for being matched with descending aorta, the middle section is used for being matched with an aortic arch part, the front section is used for being matched with ascending aorta or the aortic arch part, and the branch connecting area is arranged on the middle section of the aorta support.

After the scheme is adopted, the branch artery stent and the aorta stent are connected into a whole and can be simultaneously guided into an arterial vessel, so that the operation is simplified, the operation time is shortened, and the operation risk is reduced. Meanwhile, the folding part is arranged in the connecting area of the branch artery support and the aorta support and is positioned at the periphery of the branch artery support, so that a space for adjusting the position and the angle is provided for the branch artery support, the requirements of various distribution positions of the branch blood vessel of the aortic arch part are met, the smoothness of blood flow in the aorta support and the branch artery support is ensured, the problem of branch artery plugging is effectively solved, and the universality of the artificial support is improved.

Drawings

FIG. 1 is a first structural schematic diagram of an embodiment of the present invention;

FIG. 2 is a second structural schematic diagram according to an embodiment of the present invention;

FIG. 3 is a third structural schematic diagram according to an embodiment of the present invention;

FIG. 4 is a first schematic structural diagram according to a second embodiment of the present invention;

FIG. 5 is a second structural schematic diagram according to a second embodiment of the present invention;

fig. 6 is a third structural schematic diagram according to the third embodiment of the present invention.

Description of reference numerals:

an aortic stent 10; a front section 11; a middle section 12; a rear section 13; a holder main body 14; a coating film 15;

a branch arterial stent 20; a first branched arterial stent 21; a second branched arterial stent 22; a third branch arterial stent 23;

a branch connection region 30; the ring 31 is folded.

Detailed Description

As shown in fig. 1-6, the present invention discloses a branched aortic artificial stent, which comprises an aortic stent 10 and at least one branched arterial stent 20, wherein the aortic stent 10 comprises a stent body 14 and a covering membrane 15 sewed on the stent body 14, a branched connecting region 30 is arranged on the covering membrane 15, and the branched connecting region 30 is not sewed with the covering membrane 15; the branch arterial stent 20 is connected to a branch connection region 30 of the cover 15, and a folded portion is provided on the branch connection region 30 and located at the periphery of the branch arterial stent 20.

The present invention connects the branch arterial stent 20 and the aortic stent 10 together, so that the branch arterial stent 20 and the aortic stent 10 are delivered into the thoracic aorta together, thereby eliminating the need for a plurality of stent introduction operations. Compared with the prior art, the artificial stent with the separated aortic stent 10 and the branch arterial stent 20 can simplify the operation, reduce the operation time and reduce the operation risk by using the artificial stent of the utility model. In addition, the folding part is arranged on the periphery of the branch artery stent 20 and is formed by folding the film 15, so that the folding part can provide a certain moving space for the branch artery stent without influencing the smoothness of blood flow in the aorta stent 10 and the branch artery stent 20, and the problems of uneven distribution of the branch blood vessels at the aortic arch part and blockage of the branch arteries are effectively solved.

In this embodiment, the artificial stent includes an aortic stent 10 and three branched arterial stents 20. Wherein, aortic stent 10 is equipped with anterior segment 11, middle section 12 and back end 13, and anterior segment 11 is used for cooperating ascending aorta or aortic arch portion, and middle section 12 is used for cooperating aortic arch portion, and back end 13 is used for cooperating descending aorta, and branch connection region 30 sets up on the middle section 12 of aortic stent 10. The three branch arterial stents 20 are a first branch arterial stent 21, a second branch arterial stent 22 and a third branch arterial stent 23, respectively, for reconstructing a innominate artery, a left common carotid artery and a left subclavian artery.

The folding part of the aortic stent 10 is a folding ring 31, and the periphery of each branch arterial stent 20 is provided with at least one folding ring 31. Specifically, as shown in fig. 1-3, in the present embodiment, a plurality of folded loops 31 are concentrically nested, the second branched arterial stent 22 is located in the smallest folded loop 31, and the first branched arterial stent 21 and the second branched arterial stent 22 are located between two adjacent folded loops 31. Thus, the folded ring 31 at the outer periphery of each of the branched arterial stents 20 provides a certain space for movement thereof so that the branched arterial stent 20 can adjust its position and angle with respect to the aortic stent 10. Therefore, the artificial stent of the present invention has universality, and even if the shape and the distribution position of the aortic arch branch vessel of each person deviate, the branch arterial stent 20 can also adaptively adjust the position and the angle, enter the corresponding branch arterial vessel, and ensure the smooth blood flow.

In the embodiment shown in fig. 4-6, the folded loops 31 at the periphery of each branch arterial stent do not intersect with the folded loops 31 at the periphery of the other branch arterial stent. Namely, the angle and position adjustment of the first branch artery stent 21, the second branch artery stent 22 and the third branch artery stent 23 are all dependent on the respective folding rings 31 and are not affected each other during the position and angle adjustment.

When the operation is performed, puncture is performed through the left brachial artery, the left common carotid artery and the right brachial artery, and the three branch guide wires are respectively led out from the unknown artery, the left common carotid artery and the left subclavian artery and from the femoral artery on the same side through the aorta. The method comprises the steps of placing the artificial stent into a conveying device, enabling each branch artery stent to correspond to a branch guide wire, enabling the conveying device to enter an aorta along the branch guide wires of the aorta stent, when the aorta stent 10 reaches a specified position, sequentially positioning a first branch artery stent 21, a second branch artery stent 22 and a third branch artery stent 23 to a innominate artery, a left common carotid artery and a left subclavian artery by using the three branch guide wires, and sequentially releasing the aorta and each branch artery stent 20.

In summary, the key point of the present invention is that the branch arterial stent 20 and the aortic stent 10 are integrally connected, and can be simultaneously introduced into the arterial vessel, thereby simplifying the operation, reducing the operation time and reducing the operation risk. Meanwhile, the folding part is arranged in the connecting area of the branch artery support 20 and the aorta support 10 and is positioned at the periphery of the branch artery support 20, so that a space for adjusting the position and the angle is provided for the branch artery, the smoothness of blood flow in the aorta support 10 and the branch artery support 20 is ensured, the problems of uneven distribution of branch blood vessels at the aortic arch part and blocking of the branch artery are effectively solved, and the universality of the artificial support is improved.

The above description is only exemplary of the present invention and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above exemplary embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims

1. A branched aortic artificial stent is characterized in that: the aortic stent comprises an aortic stent and at least one branch arterial stent, wherein the aortic stent comprises a stent main body and a covering film sewed on the stent main body, a branch connecting area is arranged on the covering film, and the branch connecting area is not sewed with the covering film; the branch artery stent is connected to a branch connection area of the covering membrane, a folding portion is arranged on the branch connection area, and the folding portion is located on the periphery of the branch artery stent.

2. The branched aortic artificial stent as set forth in claim 1, wherein: the folding part is a folding ring, and at least one folding ring is arranged on the periphery of each branch artery stent.

3. The branched aortic artificial stent as set forth in claim 2, wherein: the artificial stent comprises more than two branch artery stents, and the folding ring at the periphery of each branch artery stent is not intersected with the folding rings at the periphery of other branch artery stents.

4. The branched aortic artificial stent as set forth in claim 1, wherein: the aorta support is provided with a front section, a middle section and a rear section, the rear section is used for being matched with descending aorta, the middle section is used for being matched with an aortic arch part, the front section is used for being matched with ascending aorta or the aortic arch part, and the branch connecting area is arranged on the middle section of the aorta support.