CN213722659U

CN213722659U - Aortic arch branch tectorial membrane support

Info

Publication number: CN213722659U
Application number: CN202021490747.7U
Authority: CN
Inventors: 戚悠飞; 卢敏
Original assignee: Hainan General Hospital
Current assignee: Hainan General Hospital
Priority date: 2020-07-26
Filing date: 2020-07-26
Publication date: 2021-07-20
Anticipated expiration: 2030-07-26

Abstract

The utility model relates to an aortic arch branch tectorial membrane support, including the branch bracket subassembly, branch bracket subassembly both ends are near-end and distal end respectively, the branch bracket subassembly includes outer support and inlayer support, outer support is connected with the inlayer support that is close to the near-end. The outer layer bracket structure adopts the design of a semi-ring shape and is arranged in parallel with the thoracic aorta main body bracket in the aortic arch cavity, so that the gap at the position of the bracket parallel arrangement is reduced to the maximum extent, the occurrence of inner leakage is reduced, and the success rate of the operation is improved.

Description

Aortic arch branch tectorial membrane support

Technical Field

The utility model relates to the technical field of medical equipment, more specifically say, relate to an aortic arch branch tectorial membrane support.

Background

Aortic dissection or aneurysms involving the aortic arch often complicate and make surgery difficult because of the handling involved with branches in the aortic arch. At present, the reconstruction method of aortic arch branches includes open repair (aortic arch total arch replacement), hybrid technology (hybrid aortic arch replacement, anatomical external blood vessel bypass + thoracic aorta covered stent implantation), and full-cavity technology (thoracic aorta covered stent implantation + in-situ windowing or pre-windowing, branch type thoracic aorta covered stent implantation, thoracic aorta covered stent implantation + chimney technology). Wherein, "chimney" support technique is the earliest, the most extensive technique of application, but the ubiquitous difficult problem mainly is gap ubiquitous between thoracic aorta tectorial membrane support main part and the branch support, causes "interior hourglass" problem unable to be solved, and long-term "interior hourglass" will lead to the unable intracavity of aorta pathological change (intermediate layer or aneurysm) to be isolated, and the tumor body continues to increase, finally leads to the aorta to break, the utility model discloses a new solution is proposed to above problem.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model aims to provide an aortic arch branch tectorial membrane support to solve the technical problem who mentions in the background art.

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides an aortic arch branch tectorial membrane support, includes the branch bracket subassembly, branch bracket subassembly both ends are near-end and distal end respectively, the branch bracket subassembly includes outer support and inlayer support, outer support is connected with the inlayer support that is close to the near-end.

Preferably, the outer stent is a stent graft structure.

In any of the above aspects, preferably, the inner stent is a stent graft structure.

In any of the above embodiments, preferably, the outer stent has a semicircular cross section when deployed.

In any of the above embodiments, it is preferable that the inner stent has a circular cross-section when deployed.

In any of the above schemes, preferably, the length of the outer stent is 1cm, the joint between the outer stent and the inner stent is 2cm from the proximal end, and the length of the inner stent extending out of the outer stent is 1 cm.

In any of the above aspects, it is preferred that the length of the branch stent assembly is 4cm, 5cm or 6 cm.

In any of the above aspects, it is preferred that the diameter of the branch stent assembly is 6-18 mm.

Compared with the prior art, the utility model has the advantages of:

1. the outer layer bracket structure adopts the design of a semi-ring shape and is arranged in parallel with the thoracic aorta main body bracket in the aortic arch cavity, so that the gap at the position of the bracket parallel arrangement is reduced to the maximum extent, the occurrence of inner leakage is reduced, and the success rate of the operation is improved. The design of the aorta branch bracket component with flexible outside and rigid inside skillfully solves the biggest difficult problem- 'internal leakage' which troubles clinicians for a long time in the chimney technology;

2. the inner side support frame keeps higher radial supporting force and excellent flexibility, and ensures smooth blood flow of the branch blood vessel.

Drawings

Fig. 1 is an overall structural front view of an aortic arch branch stent graft of the present invention;

fig. 2 is the utility model discloses an overall structure side view section of aortic arch branch tectorial membrane support.

The reference numbers in the figures illustrate: 1. a branch support assembly; 2. an outer layer bracket; 3. an inner layer support; 4. a proximal end; 5. a distal end.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

Example 1:

referring to fig. 1 to 2, an aortic arch branch covered stent includes a branch stent assembly 1, two ends of the branch stent assembly 1 are a proximal end 4 and a distal end 5 respectively, the branch stent assembly 1 includes an outer stent 2 and an inner stent 3, the outer stent 2 is connected with the inner stent 3 near the proximal end 4; the outer layer stent 2 is a covered stent structure; the inner layer stent 3 is a covered stent structure.

In this embodiment, the outer stent 2 has a semicircular cross section when deployed. The occurrence of the phenomenon of 'internal leakage' is organized to the maximum extent.

In this embodiment, the inner stent 3 has a circular cross-section when it is expanded. Ensuring blood flow of the branch vessel.

In the embodiment, the size is that the length of the outer layer bracket 2 is 1cm, the distance from the joint of the outer layer bracket 2 and the inner layer bracket 3 to the near end 4 is 2cm, and the length of the inner layer bracket extending out of the outer layer bracket 2 is 1cm, namely the length of the inner layer bracket extending out of the inner layer bracket is 1 cm; the length of the branch stent assembly 1 is 4cm, 5cm or 6 cm; the diameter of the branch stent assembly 1 is 6-18 mm.

Example 2:

on the basis of the embodiment 1, the inner layer bracket 3 and the outer layer bracket 2 are both made of nickel-titanium alloy materials and manufactured by the currently popular laser engraving technology, and the surface of the metal bracket is adhered with a polytetrafluoroethylene film and is arranged in a bracket conveyor outside the body. When in use, the nickel-titanium memory alloy is selected, the branch stent system is compressed in the conveyor in vitro, the stent released after entering the body is completely expanded at the normal body temperature of the human body, and the section of the outer layer film-coated stent forms a semi-annular shape. The inner layer stent 3 is in a round shape after being unfolded, the blood flow of a branch blood vessel is ensured, and the outer layer covered stent is filled in a gap between the main body of the thoracic aorta covered stent and the inner layer of the aorta branch stent, so that the inner leakage is prevented to the greatest extent.

The diameter of the bracket is 6mm at the minimum and 18mm at the maximum, which means that when a patient suffers from a pathological change position and a plurality of aortic arch branches are accumulated, the operation of double chimneys or even three chimneys can be completed only by selecting the branch brackets with corresponding specifications according to the anchoring size of each branch, thereby providing a simpler and more convenient solution for more complicated and difficult cases and simultaneously avoiding the problem of inner leakage caused by modular bracket combination.

In addition, the proximal end 4 of the branch stent assembly 1 is located within the thoracic aorta in parallel alignment with the main stent of the thoracic aorta, and the distal end 5 of the branch stent assembly 1 is located within the aortic arch branch vessel (e.g., the left subclavian artery). The inner layer bracket 3 has relatively higher radial supporting force, ensures smooth blood flow of the branch blood vessel, and ensures good medium and long-term patency rate by excellent flexibility. The outer-layer tectorial membrane bracket is relatively soft, and can effectively block the gap between the brackets, thereby reducing the occurrence of 'internal leakage' and improving the success rate of the operation. The design of the aortic branch stent system skillfully solves the biggest difficult problem of disturbing clinicians for a long time in chimney technology, namely internal leakage "

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. An aortic arch branch covered stent comprises a branch stent component (1) and is characterized in that the two ends of the branch stent component (1) are respectively a near end (4) and a far end (5), the branch stent component (1) comprises an outer stent (2) and an inner stent (3), and the outer stent (2) is connected with the inner stent (3) close to the near end (4); the section of the outer layer bracket (2) is semicircular when being unfolded.

2. The aortic arch branch stent graft of claim 1, wherein: the outer layer stent (2) is of a covered stent structure.

3. The aortic arch branch stent graft of claim 1, wherein: the inner layer stent (3) is of a covered stent structure.

4. The aortic arch branch stent graft of claim 1, wherein: the section of the inner layer bracket (3) is circular when being unfolded.

5. The aortic arch branch stent graft of claim 1, wherein: the length of the outer layer support (2) is 1cm, the distance between the joint of the outer layer support and the inner layer support (3) and the near end (4) is 2cm, and the length of the inner layer support extending out of the outer layer support (2) is 1 cm.

6. The aortic arch branch stent graft of claim 1, wherein: the length of the branch support assembly (1) is 4cm, 5cm or 6 cm.

7. The aortic arch branch stent graft of any one of claims 1-6, wherein: the diameter of the branch bracket component (1) is 6-18 mm.