CN217366188U

CN217366188U - Flow self-adaptive coronary venous sinus current limiting device

Info

Publication number: CN217366188U
Application number: CN202220457132.7U
Authority: CN
Inventors: 王建; 何奔
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2022-09-06
Anticipated expiration: 2032-03-03

Abstract

The utility model belongs to the field of medical equipment, a coronary sinus current limiting device of flow self-adaptation is disclosed, including two sets of metal support and restrictor ring, the equal nickel titanium alloy (memory metal) material of metal support and restrictor ring, metal support is fusiform and both ends are blunt nature shirt rim structure, two sets of metal support pass through the restrictor ring and connect, the outside cover of metal support has the ePTFE membrane, this device adopts the design of blunt nature shirt rim and metal beam tectorial membrane, to the damage of coronary sinus during effectual reduction device release, reduce the emergence of operation complication, adopt the aperture can expand the design of the restrictor ring of moulding for equidimension not, realize the heart blood dynamic control under different physiological states.

Description

Flow self-adaptive coronary venous sinus current limiting device

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a coronary sinus current limiting device of flow self-adaptation.

Background

With the prevalence of the risk factors of ischemic heart diseases such as aging population, hypertension and diabetes, the population of patients with refractory angina pectoris is continuously expanded, and patients with ischemic heart diseases can realize revascularization treatment by implanting coronary artery stent or coronary artery bypass graft operation, but the method still has a high proportion of angina pectoris symptoms and seriously affects the life quality of the patients.

In recent years, foreign countries have appeared that implantation of a metal stent in the coronary sinus restricts the blood flow in the coronary sinus and simulates the effect of ligating the coronary sinus at a surgical site.

However, the device adopts a fixed-aperture flow limiting design, and the adverse effect on the heart blood backflow under different physiological conditions can be generated.

Disclosure of Invention

The utility model aims at providing a coronary sinus current limiting device of flow self-adaptation to solve prior art and can't adjust the problem of coronary sinus current limiter according to individual heart blood flow volume.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a basic technical scheme is: the utility model provides a coronary sinus current limiting device of flow self-adaptation, includes two sets of metal support and restrictor ring, metal support and restrictor ring are nickel titanium alloy material, metal support is fusiform and both ends are blunt nature shirt rim structure, and is two sets of the metal support passes through the restrictor ring and connects.

The principle of the basic technical scheme is as follows: the two groups of metal supports are connected through the flow limiting ring, the metal supports and the flow limiting ring are made of nickel-titanium alloy, can be plastically deformed and can be recovered to an original state at a specific temperature, the metal supports are in a fusiform structure woven by memory metal, and the two ends of the metal supports are designed to be blunt skirt edges.

The beneficial effects of the basic technical scheme are as follows: the material that the device used has shape memory characteristic, and it is more convenient to implant, and metal support is fusiform structure and both ends of nickel titanium alloy establishment for blunt shirt rim design, can avoid naked metal roof beam to vascular sharp nature cutting, coronary sinus perforation when reducing to implant, the emergence of complication such as intermediate layer, and nickel titanium alloy has the hyperelasticity, and the current-limiting ring can be through the moulding aperture for equidimension of sacculus expansion, realizes the heart blood dynamic control under different physiological states.

Preferably, the metal stent is externally coated with an ePTFE membrane.

Through the arrangement, the device can generate a flow limiting effect on the coronary sinus immediately after being implanted, adjust the redistribution of the cardiac blood flow, increase the myocardial perfusion in an ischemic area, effectively relieve the angina pectoris symptoms of a patient, accelerate the endothelialization of the device and avoid the occurrence of complications such as venous thrombosis and the like.

Drawings

Fig. 1 is a schematic structural view of a flow adaptive coronary sinus flow limiting device according to the present invention;

the reference numerals include: metal support 1, restrictor ring 2.

Detailed Description

The invention is explained in further detail below with reference to the figures and the embodiments.

As shown in fig. 1, a flow self-adaptive coronary venous sinus flow limiting device comprises two groups of metal supports 1 and a flow limiting ring 2, wherein the two groups of metal supports 1 are connected through the flow limiting ring 2, the metal supports 1 are spindle-shaped and have blunt skirt structures at two ends, the metal supports 1 are covered with an ePTFE membrane, and the metal supports 1 and the flow limiting ring 2 are made of nickel-titanium alloy.

The specific implementation process is as follows: the method is characterized in that a patient with intractable angina is clinically evaluated before an operation, the blood flow of the coronary sinus is measured, the current-limiting aperture suitable for the patient is calculated, local anesthesia is carried out on the patient under the aseptic condition, the right internal jugular vein of the patient is punctured, a target tube access of the device entering the coronary sinus during the operation is established, coronary sinus angiography is carried out, the device is released and fixed on the coronary sinus through a guide wire, and the balloon is used for expanding the current-limiting ring 2 to the aperture suitable for the size of the blood flow of the patient.

The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A flow adaptive coronary sinus flow restriction device, comprising: including two sets of metal support (1) and restrictor ring (2), metal support (1) and restrictor ring (2) are the nickel titanium alloy material, metal support (1) is fusiform and both ends are blunt nature shirt rim structure, and are two sets of metal support (1) is connected through restrictor ring (2).

2. The flow adaptive coronary sinus flow restriction device of claim 1, wherein: the metal stent (1) is externally covered with an ePTFE membrane.