CN117860332A - Aortic dissection progress blocking device - Google Patents

Abstract

The present invention relates to the field of medical devices, and specifically discloses a device for blocking the progression of aortic dissection, comprising: an interventional catheter for entering the aorta in an interventional manner; a plurality of guide catheters, which enter the aorta along the inner cavity of the interventional catheter, the tube heads of each of the guide catheters are distributed circumferentially and are connected in sequence by elastic connectors, and the elastic connectors enable the tube heads of each of the guide catheters to extend from the port of the interventional catheter and then expand radially to contact the inner wall of the aorta; a plurality of puncture guidewires, which travel along the corresponding inner cavity of the guide catheter and extend from the tube head of the guide catheter to puncture the aorta to form a pore; and a plurality of occluders, which travel along the corresponding puncture guidewires and block the pore inside and outside the aorta while clamping the aorta. The present invention can block the progression of aortic dissection in an interventional manner, thereby stabilizing the condition and buying time for surgical treatment.

Description

A device for blocking progression of aortic dissection

Technical Field

The present invention relates to the field of medical devices, and in particular to a device for blocking the progression of aortic dissection.

Background technique

Aortic dissection (AD) refers to a disease in which the aortic intima ruptures under the influence of various factors, forming a tear. The blood in the blood vessels enters the weak middle layer of the aortic wall through the tear in the aortic intima, with or without longitudinal tearing of the middle layer, and the normal arterial wall separates, eventually forming a false lumen in the arterial wall, causing hemodynamic disorders and thus endangering life. Aortic dissection is a fatal, critical disease with an acute onset. It can cause aortic rupture in a short period of time, leading to shock and rapid death, or cause serious complications due to ischemia of distal important organs. Therefore, the pathogenesis and treatment of AD have always been a hot topic in the field of vascular disease research.

In clinical practice, aortic dissection can be divided into type A and type B according to the location of the patient's aortic dissection; type A dissection involves the aorta connected to the heart, which has the highest blood pressure and is most likely to rupture; currently the only treatment for type A dissection is emergency thoracotomy, replacing the aorta connected to the heart with an artificial blood vessel; type B dissection, in which the aortic dissection is limited to the aorta in the chest and abdomen, can be treated conservatively with interventional stents or drugs.

Aortic dissection is a dangerous disease that progresses rapidly. Some patients die before reaching the hospital. When aortic dissection progresses, blood enters the false lumen through the rupture. As the pressure increases, the false lumen continues to progress along the blood vessels. The greater the false lumen progresses, the greater the risk of rupture and organ impact. Because the dissection is constantly progressing, it is common in clinical practice that patients with type A dissection cannot undergo emergency surgery or have a long waiting period for surgery, or type B dissection reverses to type A dissection after progression. According to the inventors of the present invention, the existing technologies at home and abroad do not have devices that can block the progression of dissection, and often can only allow the progression to occur, which is extremely dangerous for patients.

Therefore, in order to solve the above problems, a device for blocking the progression of aortic dissection is needed.

Summary of the invention

In view of this, an object of the present invention is to provide a device for blocking the progression of aortic dissection, which can block the progression of aortic dissection in an interventional manner, thereby stabilizing the condition and buying time for surgical treatment.

In order to achieve the above-mentioned object, the present invention provides a device for blocking the progression of aortic dissection, comprising:

An interventional catheter, used to enter the aorta in an interventional manner;

A plurality of guide catheters are inserted into the aorta along the inner cavity of the interventional catheter, the tube heads of the guide catheters are distributed along the circumferential direction and are sequentially connected by elastic connectors, and the elastic connectors enable the tube heads of the guide catheters to extend from the ports of the interventional catheters and then expand radially to contact the inner wall of the aorta;

A plurality of puncture guide wires are arranged along the inner lumens of the corresponding guide catheters and extended from the tube heads of the guide catheters to puncture the aorta to form a puncture; and

Several occluders are advanced along corresponding puncture guidewires to block holes inside and outside the aorta while clamping the aorta.

As a further improvement to the above technical solution, the number of the guide catheters is 3 to 8, and the number of the puncture guidewires and the occluders is the same as the number of the guide catheters.

As a further improvement to the above technical solution, the elastic connecting member is an arc-shaped spring or a compression spring.

As a further improvement to the above technical solution, when the tube head of the guide catheter is placed in the inner cavity of the interventional catheter, the elastic connector is in a compressed state.

As a further improvement to the above technical solution, the tube heads of the guide catheters are evenly distributed along the circumferential direction.

As a further improvement to the above technical solution, the tip end of the guide catheter is a tip structure.

As a further improvement of the above technical solution, the occluder includes an elastic mesh support and a sealing membrane. The elastic mesh support includes a left disc, a waist and a right disc made of nickel-titanium alloy wire woven into one piece. The sealing membrane is arranged inside the left disc and the right disc.

Compared with the prior art, the present invention has the following beneficial technical effects:

The present invention provides an aortic dissection progression blocking device. When in use, an interventional catheter enters the aorta in an interventional manner and reaches the distal normal blood vessel position in the progression direction of the dissection false lumen. Then, the tube heads of each guide catheter extend from its port and extend toward the inner wall of the aorta. After the guide catheter is unfolded, a puncture guide wire is extended to puncture the tube wall to form a pore. Then, an occluder is used to block the pore and clamp the aorta at the same time, thereby forming a ring-shaped band formed by multiple occluders. This ring-shaped band presses the outer membrane, the middle membrane and the inner membrane of the normal aortic wall, so that when the dissection progresses, the false lumen progresses to this point and cannot continue to progress.

Therefore, the aortic dissection progression blocking device provided by the present invention can block the progression of aortic dissection in an interventional manner, thereby stabilizing the condition and buying time for surgical treatment; the present invention meets social needs, has strong practicality, and is conducive to promoting the further development of cardiovascular medical technology.

Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their description are used to explain the present invention but do not constitute a limitation of the present invention.

Fig. 1 is a schematic diagram of the structure of the present invention;

Fig. 2 is a diagram showing a state of use of the present invention;

FIG. 3 is a diagram showing the effect of the aorta after being blocked using the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments; of course, the accompanying drawings are simplified schematic diagrams, and their proportional sizes do not constitute a limitation on the patented product.

Example

As shown in FIGS. 1 to 3 : This embodiment provides a device for blocking the progression of aortic dissection, comprising an interventional catheter 1 , a plurality of guide catheters 2 , a plurality of puncture guidewires 3 and a plurality of occluders 4 .

The interventional catheter 1 is used to enter the aorta 9 in an interventional manner. The interventional treatment method is well known to physicians in the field of cardiovascular medicine and will not be described in detail here.

A plurality of guide catheters 2 enter the aorta 9 along the inner cavity of the interventional catheter 1, and the tube heads of the guide catheters 2 are distributed along the circumferential direction and are connected in sequence with elastic connectors 5. The elastic connectors 5 enable the tube heads of the guide catheters 2 to extend from the ports of the interventional catheters 1 and then expand radially until they contact the inner wall of the aorta 9; the tube head of the guide catheter 2 is the end that penetrates deep into the aorta 9 (away from the in vitro operating end); the number of guide catheters 2 can be determined according to needs, for example, the number of guide catheters 2 can be 3 to 8, and the number of puncture guidewires 3 and occluders 4 is the same as the number of guide catheters 2.

Preferably, the tube heads of each of the guide catheters 2 are evenly distributed along the circumference, and the head ends of each guide catheter 2 are in the same plane, and adjacent tube heads have the same angle; the diameter of the circle where the tube heads of the guide catheters 2 are located after being unfolded is larger than the diameter of the interventional catheter 1; when the tube head of the guide catheter 2 is placed in the inner cavity of the interventional catheter 1, the elastic connector 5 is in a compressed state (partially compressed or fully compressed), and at this time there is a certain relative pressure between the guide catheter 2 and the inner wall of the interventional catheter 1, so that the guide catheter 2 can move with the interventional catheter 1; the elastic connector 5 can be an arc-shaped spring or a compression spring; in addition, the head end of the guide catheter 2 can be a pointed structure to facilitate its positioning on the inner wall of the aorta 9.

A plurality of puncture guidewires 3 travel along the corresponding inner cavity of the guide catheter 2 and extend from the tube head of the guide catheter 2 to puncture the aorta 9 to form a pore 8; the puncture guidewires 3 can be elastic metal wires that can puncture the wall of the aorta 9 and can play a guiding role during interventional operations.

A number of occluders 4 travel along the corresponding puncture guide wires 3 and block the pores 8 on the inside and outside of the aorta 9 while clamping the aorta 9; the occluders 4 are the same as the existing heart defect occluders 4 in structure and principle, but are smaller in size to meet the placement requirements of the aorta 9; for example, the occluder 4 may include an elastic mesh support and a sealing membrane (not shown in the figure), the elastic mesh support includes a left disc 41, a waist 42 and a right disc 43 made of nickel-titanium alloy wire woven into one piece, and the sealing membrane is arranged inside the left disc 41 and the right disc 43.

The existing heart defect occluder 4 is used to treat congenital heart septal defect. The septal wall of the defect is clamped by the left and right mesh frames of the occluder 4 to close the defect and achieve the purpose of clinical cure. For example, patents CN205903284U and CN219763408U can be seen; while this embodiment creatively utilizes the perforation and clamping characteristics of the occluder 4, and clamps the aorta 9 wall in an artificial perforation manner with multiple occluders 4, thereby blocking the progression of aortic dissection 9. The interventional operation of the occluder 4 is well known to those skilled in the art, and a delivery sheath 5 can generally be used, which will not be repeated here.

Specifically, when in use, the interventional catheter 1 enters the aorta 9 in an interventional manner, and DSA (digital subtraction angiography) is used to determine that it has reached the vicinity of the dissection progression, and the distal normal aorta 9 position in the direction of the dissection false lumen progression is found. A plurality of guide catheters 2 are extended from the interventional catheter 1, and when the elastic connector 5 is relaxed, an umbrella-like structure is formed. The tip of the guide catheter 2 can be pressed against the inner wall of the aorta 9, and a puncture guide wire 3 is extended from the guide catheter 2. The puncture guide wire 3 punctures the aorta 9 wall. As the puncture guide wire 3 is extended, each puncture guide wire 3 can be extended into a small The occluder 4 is used (multiple occluders 4 can reduce bleeding at the same time, and each occluder 4 can adjust its relative position when used one by one to make the occlusion more accurate. The specific operation depends on the objective situation). Finally, an annular belt formed by multiple occluders 4 is formed around the normal aorta 9. This annular belt presses the outer membrane, middle membrane and inner membrane of the wall of the normal aorta 9 at the same time, so that when the dissection progresses, the false lumen 7 progresses to this position and cannot continue to progress. The device of this embodiment is particularly suitable for preventing type B dissection from being torn into type A dissection, and can also provide rivet points for the implantation of type B dissection stents.

Finally, it should be noted that this article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only to help understand the core idea of the present invention. Without departing from the principles of the present invention, the present invention may be further improved and modified, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims (7)

1. A device for blocking the progression of aortic dissection, comprising: An interventional catheter, used to enter the aorta in an interventional manner; A plurality of guide catheters are inserted into the aorta along the inner cavity of the interventional catheter, the tube heads of the guide catheters are distributed along the circumferential direction and are sequentially connected by elastic connectors, and the elastic connectors enable the tube heads of the guide catheters to extend from the ports of the interventional catheters and then expand radially to contact the inner wall of the aorta; A plurality of puncture guide wires are arranged along the inner lumens of the corresponding guide catheters and extended from the tube heads of the guide catheters to puncture the aorta to form a puncture; and Several occluders are advanced along corresponding puncture guidewires to block holes inside and outside the aorta while clamping the aorta. 2. The device for blocking progression of aortic dissection according to claim 1, characterized in that: The number of the guide catheters is 3 to 8, and the number of the puncture guidewires and occluders is the same as the number of the guide catheters. 3. The device for blocking progression of aortic dissection according to claim 1, characterized in that: The elastic connecting member is an arc-shaped spring or a compression spring. 4. The device for blocking progression of aortic dissection according to claim 1, characterized in that: When the tube head of the guide catheter is placed in the inner cavity of the interventional catheter, the elastic connector is in a compressed state. 5. The device for blocking progression of aortic dissection according to claim 1, characterized in that: The tube heads of the guide catheters are evenly distributed along the circumferential direction. 6. The device for blocking progression of aortic dissection according to claim 1, characterized in that: The head end of the guide catheter is a tip structure. 7. The device for blocking progression of aortic dissection according to any one of claims 1 to 6, characterized in that: The occluder comprises an elastic mesh support and a sealing membrane. The elastic mesh support comprises a left disc, a waist and a right disc which are integrally formed by weaving nickel-titanium alloy wires. The sealing membrane is arranged inside the left disc and the right disc.