CN215874803U

CN215874803U - Left atrial appendage sealant plugging system

Info

Publication number: CN215874803U
Application number: CN202121779505.4U
Authority: CN
Inventors: 刘宗军; 冯骥; 徐佑龙; 张江翔
Original assignee: Shanghai Huida Medical Instrument Co ltd
Current assignee: Shanghai Huida Medical Instrument Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-02-22
Anticipated expiration: 2031-08-02

Abstract

The utility model relates to a left atrial appendage rubber-filled plugging system which comprises an intervention part and an implantation part, wherein the intervention part is a conveying system, the implantation part is hydrogel and a plugging device, the plugging device comprises a guide section and a plugging disc, the guide section comprises a smooth head end and a knitting section, one end of knitting silk of the knitting section is fixedly connected with the smooth head end, the other end of the knitting silk extends to the plugging disc to form a knitting net, the plugging disc is provided with a film-shaped structure on the inner side or the outer side or both the inner side and the outer side of the knitting net, the film-shaped structure is used for blocking contrast agent, blood and hydrogel, the preforming of the knitting net has two forms, one form is a disc-shaped structure, the other form is a tubular structure formed by axially stretching two ends of the disc-shaped structure, and the conveying system is detachably connected with the plugging disc. The plugging disc of the utility model changes the shape along with the mesh grid, so that the plugging disc can tightly plug the left auricle part; the plugging disc can be slowly degraded and disappear at the later stage, and the occupied space is reduced.

Description

Left atrial appendage sealant plugging system

Technical Field

The utility model relates to the technical field of atrial fibrillation treatment, in particular to a left atrial appendage sealant plugging system.

Background

In the field of cardiovascular and cerebrovascular medical treatment, atrial fibrillation is the most common sustained arrhythmia in clinic, leads to thromboembolism, and then leads to symptoms such as palpitation, chest distress, dizziness and the like, and the biggest harm is stroke, and can kill or cause disability in serious cases, thus seriously affecting the health and the life quality of people. Prevention of stroke is therefore a fundamental goal in atrial fibrillation therapy.

The left atrial appendage is an important part of thromboembolism origin of patients with atrial fibrillation, 60 percent of cardiogenic thrombi of patients with rheumatic heart disease and atrial fibrillation come from the left atrial appendage, and more than 90 percent of thrombi in patients with non-valvular ward fibrillation are formed in the left atrial appendage. In view of the importance of the left atrial appendage in atrial thrombosis, percutaneous occlusion of the left atrial appendage has been developed in recent years. The percutaneous occlusion of the left atrial appendage is known as plugging the left atrial appendage by a feasible method, so as to prevent thrombus from falling off to blood vessels to form embolism, and is applied clinically as early as 8 months in 2001. The surgical approach is divided into a surgical approach and an internal medical approach, and the surgical approach is mostly unacceptable due to large trauma. The medical percutaneous left atrial appendage plugging prevention of stroke is more and more concerned, and the minimally invasive interventional therapy method is short in time, small in wound and fast in effect. Although oral anticoagulant drugs can significantly reduce the probability of ischemic stroke of patients with atrial fibrillation, frequent blood drawing is needed to monitor the coagulation index, the probability of intracranial hemorrhage is increased by 2-5 times even in proper anticoagulation strength, and the clinical use of anticoagulants such as warfarin is limited to a certain extent for some patients with anticoagulation contraindications. Therefore, it is anticipated that percutaneous left atrial appendage closure will be the primary means of treating atrial fibrillation complications in the future.

The existing left auricle occluder comprises two parts, namely an occluder disc and a fixed disc, and the using method uses a conveying system to reach the left atrium through femoral veins, inferior vena cava, right atrium and interatrial septum, determines the position of the left auricle by radiography at the left auricle, releases the left auricle occluder ventriculi at the left auricle part, ensures that the fixed disc of the left auricle occluder is positioned inside the left auricle, ensures that the occluder disc of the left auricle occluder can completely occlude the left auricle part, disconnects the conveying system from the occluder, withdraws the conveying system and leaves the left auricle part. The problems of complex installation, incapability of degrading the plugging disc, space occupation and the like exist.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a left auricle filling and plugging system, wherein a plugging disc changes the shape along with a mesh grid, so that the plugging disc can tightly plug the mouth part of the left auricle; the plugging disc can be slowly degraded and disappear at the later stage, and the occupied space is reduced.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the left atrial appendage bone filling and sealing system comprises an intervention part and an implantation part, wherein the intervention part is a conveying system, the implantation part is hydrogel and a sealing device, the sealing device comprises a guide section and a sealing disc, the guide section comprises a smooth head end and a knitting section, one end of knitting silk of the knitting section is fixedly connected with the smooth head end, the other end of the knitting silk extends to the sealing disc to form a knitting net, the sealing disc is provided with a film-shaped structure on the inner side or the outer side or both the inner side and the outer side of the knitting net, the film-shaped structure is used for blocking contrast agents, blood and hydrogel, the preforming of the knitting net has two forms, one form is a disc-shaped structure, the other form is a tubular structure formed by axially stretching two ends of the disc-shaped structure, and the conveying system is detachably connected with the sealing disc.

As a supplement to the technical scheme of the utility model, the weaving section has a larger gap grid, so that hydrogel can seep out of the grid and flow to the inner wall of the left auricle conveniently.

As a supplement to the technical solution of the present invention, the knitting yarn material of the knitting section is a high-elasticity deformable material.

In addition to the technical solution of the present invention, the deformable material is a biodegradable material having biocompatibility.

As a supplement to the technical solution of the present invention, the material of the membranous structure on the occlusion disk is a degradable material with biocompatibility.

As a supplement to the solution according to the utility model, the distal end of the delivery system is provided with a thread or a helical structure for connection or release with the proximal end of the occlusion disk.

As a supplement to the technical scheme of the utility model, the center shaft of the plugging disc is of a through hole structure, so that blood suction and hydrogel injection are facilitated, and an internal thread structure is arranged at the proximal end of the through hole.

As a supplement to the technical solution of the present invention, the lumen of the delivery system has two or more independent chambers, wherein one chamber is used for sucking back blood and maintaining a negative pressure state in the left atrial appendage after the occlusion disk occludes the mouth of the left atrial appendage, and the other chamber is used for pouring hydrogel.

Has the advantages that: the utility model relates to a left auricle filling plugging system, wherein the pre-forming of a woven mesh has two forms, one is a disc-shaped structure, the other is that the two ends of the disc-shaped structure are axially stretched to form a tubular structure, and the form of a plugging disc is changed along with the woven mesh, so that the plugging disc can tightly plug the mouth part of the left auricle; the plugging disc can be slowly degraded and disappear at the later stage, and the occupied space is reduced.

Drawings

Fig. 1-4 are diagrams of the present invention in use.

The figure is as follows: 1. left auricle, 2, plugging disc, 3, conveying system, 4, weaving section, 5, smooth head end.

Detailed Description

The utility model will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

The embodiment of the utility model relates to a left atrial appendage caulk system, as shown in fig. 1-4, the caulk system comprises an interventional part and an implanted part, the interventional part is a delivery system 3, the implanted part is hydrogel and a plugging device, the plugging device comprises a guiding section and a plugging disc 2, the guiding section comprises a smooth head end 5 and a knitting section 4, one end of knitting silk of the knitting section 4 is fixedly connected with the smooth head end 5, the other end extends to the plugging disc 2 to form a knitting net, the plugging disc 2 is attached with a film structure at the inner side or the outer side or both sides of the knitting net, the film structure is used for blocking contrast agent, blood and hydrogel, the knitting net can be preformed into a disc-shaped structure shown in fig. 1 due to the fact that the knitting silk is made of high-elasticity material, and the two ends of the disc-shaped structure can also be axially stretched to form a tubular structure (fig. 2), the braided wires cannot break under the two forms, and the conveying system 3 is detachably connected with the plugging disc 2.

The weaving section 4 has a large gap grid, so that hydrogel can seep out of the grid and flow to the inner wall of the left atrial appendage conveniently.

The weaving thread material of the weaving section 4 is a high-elasticity variable material, preferably a degradable material with biocompatibility.

The material of the membranous structure on the plugging disc 2 is degradable material with biocompatibility.

The far end of the conveying system 3 is provided with a thread or a spiral structure which is used for connecting or releasing with the near end of the plugging disc 2.

The center shaft of the plugging disc 2 is of a through hole structure, so that blood can be conveniently sucked and hydrogel can be conveniently injected, and an internal thread structure is arranged at the near end of the through hole.

Two or more independent chambers exist in the inner cavity of the conveying system 3, wherein one chamber is used for sucking back blood and maintaining the negative pressure state in the left auricle after the plugging disc 2 plugs the mouth of the left auricle, and the other chamber is used for pouring hydrogel.

The using method comprises the following steps: the delivery system 3 is used for reaching the left atrium through femoral vein, inferior vena cava, right atrium and interatrial septum, the position of the left auricle is determined by radiography at the part of the left auricle, the plugging disc 2 is released at the part of the left auricle, so that the plugging disc 2 can completely plug the part of the left auricle, negative pressure suction is carried out, blood in the left auricle is discharged, and the negative pressure state is kept.

At the moment, hydrogel is injected into the left auricle through the conveying system 3, after the hydrogel is primarily cured, the mouth part of the left auricle is tightly adhered by the hydrogel, and meanwhile, the guide section is also adhered and fixed by the hydrogel.

And (3) disconnecting the link between the conveying system 3 and the plugging disc 2, withdrawing the conveying system 3, leaving the plugging disc 2 at the left auricle part, and after a certain time, completely curing the hydrogel and gradually degrading and disappearing the plugging disc 2.

Claims

1. The utility model provides a left atrial appendage caulking plugging system which characterized in that: the adhesive filled occlusion system comprises an interventional part and an implanted part, wherein the interventional part is a delivery system (3), the implanted part is hydrogel and an occlusion device, the plugging device comprises a guide section and a plugging disc (2), wherein the guide section comprises a smooth head end (5) and a weaving section (4), one end of the knitting silk of the knitting section (4) is fixedly connected with the smooth head end (5), the other end extends to the plugging disc (2) to form a knitting net, the plugging disc (2) is attached with a membranous structure at the inner side or the outer side or both the inner side and the outer side of the woven net, the membrane structure is used for blocking contrast agents, blood and hydrogel, the woven mesh preforming has two forms, one is a disc-shaped structure, the other is a tubular structure formed by stretching two ends of the disc-shaped structure along the axial direction, and the conveying system (3) is detachably connected with the blocking disc (2).

2. A left atrial appendage sealant occlusion system as in claim 1, wherein: the braided section (4) has a gap grid, so that hydrogel can seep out of the grid and flow to the inner wall of the left atrial appendage conveniently.

3. A left atrial appendage sealant occlusion system as in claim 1, wherein: the knitting silk material of the knitting section (4) is a high-elasticity variable material.

4. A left atrial appendage caulk closure system as in claim 3, wherein: the deformable material is a degradable material with biocompatibility.

5. A left atrial appendage sealant occlusion system as in claim 1, wherein: the material of the membranous structure on the plugging disc (2) is degradable material with biocompatibility.

6. A left atrial appendage sealant occlusion system as in claim 1, wherein: the far end of the conveying system (3) is provided with a thread or a spiral structure and is used for being connected with or released from the near end of the plugging disc (2).

7. A left atrial appendage caulk closure system as in claim 6, wherein: the center shaft of the plugging disc (2) is of a through hole structure, so that blood can be conveniently sucked and hydrogel can be conveniently injected, and an internal thread structure is arranged at the near end of the through hole.

8. A left atrial appendage sealant occlusion system as in claim 1, wherein: two or more independent chambers are arranged in the inner cavity of the conveying system (3), wherein one chamber is used for sucking back blood and maintaining the negative pressure state in the left auricle after the plugging disc (2) plugs the mouth of the left auricle, and the other chamber is used for pouring hydrogel.