Viscous hydrogel injection system for aortic abdominal dissection

Abstract

The invention relates to the technical field of medical apparatus and instruments, in particular to a viscous hydrogel injection system for abdominal aortic dissection, comprising: a cannula internally provided with a puncture member capable of puncturing the endangium of a patient; the traction assembly is connected with the sleeve, the traction assembly can stabilize the sleeve when the puncture part performs puncture action, and the traction assembly comprises a traction part which is arranged in the sheath tube and can extend to the outside of the sheath tube from the side hole; the traction assembly further comprises an expansion piece connected with the traction piece. The expansion piece comprises a balloon arranged on the traction piece, and the balloon enables the traction piece to be stable through expansion.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a viscous hydrogel injection system for abdominal aortic dissection. Background Art

[0002] Aortic dissection is divided into thoracic aortic dissection and abdominal aortic dissection. Currently, the treatment options for aortic dissection include: 1. Open surgery: artificial blood vessel replacement; 2. Minimally invasive surgery: intravascular intervention and covered stent implantation.

[0003] Current treatments usually require the implantation of covered stents, but these stents are non-degradable and are accompanied by risks such as endoleak, which may lead to long-term vascular complications such as stent infection, endoleak and stent migration.

[0004] Specifically, the existing technical solution uses viscous hydrogel instead of coated stents. When in use, the injection needle can inject the gel into the aortic dissection, but this device lacks stability, that is, during injection, the sheath is easily displaced due to the reaction force, affecting the stable progress of the operation. Summary of the invention

[0005] The object of the present invention is to provide a viscous hydrogel injection system for abdominal aortic dissection to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A viscous hydrogel injection system for abdominal aortic dissection, comprising:

[0008] A cannula, wherein the cannula has a built-in puncture element capable of puncturing the endothelium of a patient's blood vessel;

[0009] A traction assembly is connected to the sleeve, and the traction assembly can stabilize the sleeve when the puncture member performs a puncture action.

[0010] As a further solution of the present invention: the cannula includes a sheath tube, the interior of the sheath tube is a hollow structure, and a side hole is formed on the sheath tube;

[0011] One end of the sheath tube is a 30° curved tube.

[0012] As a further solution of the present invention: the puncture member includes an injection needle arranged in the sheath tube, two independent channels are formed in the injection needle, and each of the independent channels is provided with a gel injection port.

[0013] As a further solution of the present invention: the traction assembly includes a traction member disposed in the sheath tube and capable of extending from the side hole to the outside thereof;

[0014] The traction assembly further includes an expansion member connected to the traction member.

[0015] As a further solution of the present invention: the expansion member includes a balloon arranged on the traction member, and the balloon stabilizes the traction member by expanding.

[0016] As a further solution of the present invention: a guiding arc surface is formed on one side of the side hole, and the guiding arc surface can guide the traction member to extend from the side hole toward the outside of the sheath tube.

[0017] As a further solution of the present invention: the diameter of the side hole is 1 to 5 mm.

[0018] As a further solution of the present invention: the length of the balloon is 6 to 9 mm.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By injecting viscous hydrogel, thrombosis in the aneurysm cavity is promoted to reduce the risk of rupture of abdominal aortic dissecting aneurysm. The hydrogel is a biodegradable material, which avoids the risk of long-term complications.

[0021] By setting up the traction component, the sheath can be connected to the healthy common iliac artery by inflating the balloon before puncture and injection, so that the healthy common iliac artery can be used as a fulcrum to provide stability assistance for the sheath, avoiding the reaction force during puncture and injection from acting on the sheath and causing it to move, thereby improving the safety and stability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a schematic structural diagram of an embodiment of a viscous hydrogel injection system for abdominal aortic dissection.

[0023] Figure 2 This is a schematic diagram of the internal structure of the sheath in one embodiment of a viscous hydrogel injection system for abdominal aortic dissection.

[0024] Figure 3 for Figure 2 A magnified view of the structure at center.

[0025] Figure 4 A cross-sectional view of an injection needle in one embodiment of a viscous hydrogel injection system for abdominal aortic dissection.

[0026] In the figure: 1, sheath; 2, injection needle; 201, gel injection port; 3, traction piece; 4, balloon; 401, air injection port; 5, side hole; 6, guiding arc surface. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0029] See also Figure 1 to Figure 4 In an embodiment of the present invention, a viscous hydrogel injection system for abdominal aortic dissection includes: a cannula and a traction assembly, so that before puncture injection, the sheath tube 1 can be connected to the healthy common iliac artery by expanding the balloon 4, so that the healthy common iliac artery can be used as a fulcrum to provide stability assistance for the sheath tube 1, avoiding the reaction force during puncture injection from acting on the sheath tube 1 and causing it to move, thereby improving the safety and stability of the operation.

[0030] The details are as follows: the sleeve has a built-in puncture element capable of puncturing the endothelium of a patient's blood vessel;

[0031] The sleeve includes a sheath tube 1, the interior of the sheath tube 1 is a hollow structure, and one end of the sheath tube 1 is a 30° arc-shaped bend tube. The puncture piece includes an injection needle 2 arranged in the sheath tube 1, and two independent channels are formed in the injection needle 2. Each of the independent channels is provided with a gel injection port 201. The two independent channels enable the mixed gel to be injected separately and mixed in the abdominal aortic dissection to generate a viscous gel, thereby promoting the formation of aortic dissection thrombosis.

[0032] When in use, the injection needle 2 is first inserted into the sheath 1, and the end of the injection needle 2 is controlled not to be exposed from one end of the sheath 1. Then the sheath 1 is held and inserted into the patient's body through surgery on the patient's body. The doctor observes the position of the sheath 1 in the patient's body through an endoscope, adjusts the position of the sheath 1 to align it with the patient's affected area, and after the sheath 1 is stable, pushes the injection needle 2 to move, thereby completing the puncture action.

[0033] The sheath tube 1 can be used repeatedly. In order to avoid cross infection among patients, the sheath tube 1 must be disinfected and sterilized before and after use and stored in a sterile environment.

[0034] It should be noted that when the injection needle 2 performs injection, the injected substance is a viscous hydrogel.

[0035] See also Figure 2-Figure 3 The sheath tube 1 is formed with a side hole 5, the aperture of the side hole 5 is 1 to 5 mm, and a guide arc surface 6 is formed on one side of the side hole 5;

[0036] The traction assembly is connected to the sleeve, and the traction assembly can stabilize the sleeve when the puncture member performs a puncture action;

[0037] The traction assembly includes a traction member 3 arranged in the sheath tube 1 and capable of extending from the side hole 5 to the outside thereof. The traction member 3 is a tubular structure with a hollow interior. The guiding arc surface 6 can guide the traction member 3 to extend from the side hole 5 toward the outside of the sheath tube 1. Preferably, the aperture of the side hole 5 is 3 mm so as to match the traction member 3 and facilitate the traction member 3 to enter the outside of the sheath tube 1 through the side hole 5.

[0038] It should be noted that the injection needle 2 has a certain elasticity, and the traction member 3 is made of an elastic material, and can be exposed from the sheath tube 1 after being deviated at a certain angle.

[0039] The traction assembly also includes an expansion piece connected to the traction piece 3, and the expansion piece includes a balloon 4 arranged on the traction piece 3. The balloon 4 stabilizes the traction piece 3 by expanding. The length of the balloon 4 is 6 to 9 mm. Specifically, the length of the balloon 4 is preferably 8 mm, so that after the balloon 4 is expanded, it can ensure the stabilizing force of the traction piece 3 while avoiding the inconvenience of the balloon 4 moving in the patient's body.

[0040] One end of the traction member 3 is provided with an air injection port 401, and the other end is connected to the balloon 4. When the sheath tube 1 is inserted into the patient's body, the traction member 3 is first controlled to move so that the balloon 4 can be placed at the healthy common iliac artery, and the balloon 4 is inflated through the air injection port 401 to control the expansion of the balloon 4 and act on the healthy common iliac artery to fix the balloon 4. At this time, the balloon 4 pulls the sheath tube 1 through the traction member 3, so that the sheath tube 1 can be relatively fixed. During the puncture injection process, the sheath tube 1 is subjected to the pulling force, and is prevented from being displaced due to the reaction force of the puncture, thereby improving the stability of the sheath tube 1 during the puncture injection process.

[0041] Through the above-mentioned arrangement, before puncture injection, the sheath 1 can be connected to the healthy common iliac artery by expanding the balloon 4, so that the healthy common iliac artery can be used as a fulcrum to provide stability assistance for the sheath 3, avoiding the reaction force during puncture injection from acting on the sheath 1 and causing it to be displaced, thereby improving the safety and stability of the operation.

[0042] To summarize, when in use, first insert the injection needle 2 into the sheath 1, and control the end of the injection needle 2 not to be exposed from one end of the sheath 1, then hold the sheath 1 and insert it into the patient's body through surgery on the patient's body. The doctor observes the position of the sheath 1 in the patient's body through an endoscope, adjusts the position of the sheath 1 to align it with the patient's diseased area, and after the sheath 1 is stable, pushes the injection needle 2 to move, thereby completing the puncture action.

[0043] Before puncture injection, the traction member 3 is controlled to move so that the balloon 4 can be placed at the healthy common iliac artery. The balloon 4 is controlled to expand and dilate through an external control device, and can act on the healthy common iliac artery to fix the balloon 4. At this time, the balloon 4 pulls the sheath tube 1 through the traction member 3, so that the sheath tube 1 can be relatively fixed. During the puncture injection, the sheath tube 1 is subjected to the traction force, and is prevented from being displaced due to the puncture reaction force, thereby improving the stability of the sheath tube 1 during the puncture injection.

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A viscous hydrogel injection system for abdominal aortic dissection, characterized in that: include: A cannula, wherein the cannula has a built-in puncture element capable of puncturing the endothelium of a patient's blood vessel; A traction assembly is connected to the sleeve, and the traction assembly can stabilize the sleeve when the puncture member performs a puncture action.

2. A viscous hydrogel injection system for abdominal aortic dissection according to claim 1, characterized in that: The cannula comprises a sheath tube (1), the interior of the sheath tube (1) is a hollow structure, and a side hole (5) is formed on the sheath tube (1); One end of the sheath tube (1) is a 30° arc-shaped curved tube.

3. A viscous hydrogel injection system for abdominal aortic dissection according to claim 2, characterized in that: The puncture member comprises an injection needle (2) arranged in the sheath tube (1), two independent channels are formed in the injection needle (2), and each of the independent channels is provided with a gel injection port (201).

4. A viscous hydrogel injection system for abdominal aortic dissection according to claim 2, characterized in that: The traction assembly comprises a traction member (3) which is arranged in the sheath tube (1) and can extend from the side hole (5) to the outside thereof; The traction assembly also includes an expansion piece connected to the traction piece (3).

5. A viscous hydrogel injection system for abdominal aortic dissection according to claim 4, characterized in that: The expansion member comprises a balloon (4) arranged on the traction member (3); the balloon (4) stabilizes the traction member (3) by expanding.

6. A viscous hydrogel injection system for abdominal aortic dissection according to claim 4, characterized in that: A guiding arc surface (6) is formed on one side of the side hole (5), and the guiding arc surface (6) can guide the traction member (3) to extend from the side hole (5) toward the outside of the sheath tube (1).

7. A viscous hydrogel injection system for abdominal aortic dissection according to claim 2, characterized in that: The diameter of the side hole (5) is 1 to 5 mm.

8. The viscous hydrogel injection system for abdominal aortic dissection according to claim 5, characterized in that: The length of the balloon (4) is 6 to 9 mm.

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