CN114699165B - An electrical memory ablation catheter suitable for radial artery - Google Patents

Abstract

Translated fromChinese

本发明公开了一种适用于桡动脉的电记忆消融导管，属于医疗器械技术领域，该适用于桡动脉的电记忆消融导管，包括电磁构件，其未通电时的形态为常态，所述电磁构件用以在所述常态时进入桡动脉，所述电磁构件通电后的形态为电磁态，所述电磁构件用以在电磁态时，其磁性变化，所述电磁构件的主体卷曲变形；发热件，所述电磁构件处于所述电磁态时，用以放热并跟随所述电磁构件的形变而配合产生形变，以进入射频消融状态。通过设置电磁构件，其在未通电状态下呈平直的线形，极大的减小了导管的外径，使得本发明提供的导管可以从桡动脉进入，使导管能够平缓顺利的进入桡动脉血管中，与现行技术相比，本装置无需使用导引导丝也能拥有转向功能。

The present invention discloses an electric memory ablation catheter suitable for radial artery, belonging to the field of medical device technology. The electric memory ablation catheter suitable for radial artery includes an electromagnetic component, whose shape when not powered on is normal, and the electromagnetic component is used to enter the radial artery in the normal state, and the shape of the electromagnetic component after powering on is electromagnetic state, and the electromagnetic component is used to change its magnetism in the electromagnetic state, and the main body of the electromagnetic component is curled and deformed; a heating element, when the electromagnetic component is in the electromagnetic state, it is used to release heat and follow the deformation of the electromagnetic component to produce deformation to enter the radiofrequency ablation state. By setting the electromagnetic component, it is in a straight line shape when not powered on, which greatly reduces the outer diameter of the catheter, so that the catheter provided by the present invention can enter from the radial artery, so that the catheter can smoothly enter the radial artery blood vessel. Compared with the existing technology, this device can have a steering function without using a guide wire.

Description

Electric memory ablation catheter suitable for radial artery

Technical Field

The invention belongs to the technical field of medical appliances, and particularly relates to an electrical memory ablation catheter suitable for radial artery.

Background

Radiofrequency ablation is a minimally invasive interventional therapy aimed at tumor parts, and has proven to be an effective, safe, minimally invasive technique with few complications and accurate positioning for treating malignant solid tumors. The fundamental principle of radiofrequency ablation is hyperthermia. The radio frequency is a high-frequency electromagnetic wave, which consists of an alternating electric field and a magnetic field, and forms a closed loop in the human body from the emitter to the therapeutic electrode needle through the negative plate by energy generated by the radio frequency wave of 375kHz to 500 kHz. The charged ions and the charged colloid mutually collide and rub at high speed under the action of an alternating current electric field formed by radio frequency to generate heat energy so as to raise the temperature of tissues and generate coagulation necrosis. It is generally believed that when temperatures above (65.+ -.5) degrees C.are reached, maximum damage to the tumor tissue is achieved.

The radial artery access is associated with reduced incidence of bleeding, vascular complications and mortality in high risk populations (e.g., STEMI patients) and reduces treatment costs compared to the femoral artery access. The current catheter structure to radio frequency ablation technique adopts the structure and adopts the coaxial structure of inlayer skin pipe, middle skeleton layer, wire layer, electrode layer, and occupy the space of one deck respectively, utilizes this kind of structure can increase the external diameter of pipe, makes the external diameter be greater than radial artery opening part internal diameter, can't realize radial artery access.

A flexible radio frequency ablation catheter is proposed by CN112773499A, an insulating catheter is sleeved on a conductive capillary tube to form an annular pipeline, the conductive capillary tube penetrates through the opening end of a conductive circular tube and is deeply connected with the insulating catheter to the sealing end of the conductive circular tube, and circulating flow of a refrigerant medium takes away heat excessively concentrated on the working end, namely the surface of the conductive circular tube and nearby tissues, so that blood in a lesion vein cavity wall or vein cavity is not adhered to the surface of the working end, carbonization on the surface of the working end is avoided, the operation time is shortened, but the catheter is generally designed for femoral artery access, and the outer diameter of the catheter is larger than the inner diameter of a radial artery opening, so that radial artery access cannot be realized.

Disclosure of Invention

The invention aims to provide an electrical memory ablation catheter suitable for radial artery, which aims to solve the problems that in the prior art, the conventional ablation catheter is mainly characterized in that an inner-layer outer-layer catheter, an intermediate skeleton layer, a wire layer and an electrode layer adopt coaxial structures in the use process, and the outer diameter of the catheter can be increased by utilizing the coaxial structures, so that the outer diameter is larger than the inner diameter of an opening of the radial artery, and the radial artery access cannot be realized.

In order to achieve the above purpose, the invention provides the following technical scheme that the electrical memory ablation catheter suitable for radial artery comprises:

An electromagnetic member in a normal state when not energized, wherein the electromagnetic member is used for entering a radial artery in the normal state, the electromagnetic member is in an electromagnetic state after being energized, the electromagnetic member is used for changing magnetism in the electromagnetic state, and a main body of the electromagnetic member is curled and deformed;

And the heating piece is used for releasing heat and generating deformation along with the deformation of the electromagnetic component when the electromagnetic component is in the electromagnetic state so as to enter a radio frequency ablation state.

Preferably, when the electromagnetic member is in the normal state, the electromagnetic member and the heating element therein are straight.

Preferably, the heating element is arranged in the electromagnetic member so as to drive the heating element to deform, and the heating temperature of the heating element is less than 100 ℃.

Preferably, the electromagnetic member is uniformly provided with a plurality of arc-shaped grooves, so that the heating element exposes out of heat release.

Preferably, the electromagnetic member comprises an outer electromagnetic member and an inner electromagnetic member.

Preferably, when the electromagnetic member is electrified to be in the electromagnetic state, the polarities of the magnetic poles of the outer electromagnetic member positioned at two sides of the arc-shaped groove are the same, and the magnetic poles tend to repel each other, so that the electromagnetic member is curled and deformed.

Preferably, when the electromagnetic member is electrified to be in the electromagnetic state, the polarities of the magnetic poles of the inner electromagnetic member positioned at two sides of the arc-shaped groove are opposite, and the magnetic poles have the mutual attraction trend, so that the electromagnetic member is curled and deformed, and the distance between the side walls of the arc-shaped groove at the outer electromagnetic member is larger than the distance between the side walls of the arc-shaped groove at the inner electromagnetic member.

Preferably, the electromagnetic member is bent in a spiral shape by the magnetic force of the outer electromagnetic member and the inner electromagnetic member.

Preferably, when the electromagnetic member is bent into a spiral shape, the electromagnetic member is close to one side of the axis of the spiral structure, and the corresponding external electromagnetic member is far away from one side of the axis of the spiral structure.

Preferably, the material of the electromagnetic member includes iron-cobalt-nickel alloy.

Compared with the prior art, the invention has the beneficial effects that:

1. By arranging the electromagnetic component, the electromagnetic component is in a gentle linear shape in a non-electrified state, so that the outer diameter of the catheter is greatly reduced, the catheter provided by the invention can enter from the radial artery, the catheter can smoothly enter into the radial artery blood vessel, the number of times of radial artery access puncture is reduced, and the radial artery puncture complications are reduced.

2. After the electromagnetic component is electrified, the magnetism in the electromagnetic component changes, the heating element in the electromagnetic component is driven to bend into a spiral shape under the action of the magnetism, the heating element is exposed to generate heat, and radio frequency treatment is further carried out.

Drawings

FIG. 1 is a schematic view of the electromagnetic member of the present invention in a normal state;

FIG. 2 is a schematic view of the front structure of the electromagnetic member of the present invention in a normal state;

FIG. 3 is a schematic polarity diagram of the electromagnetic member of the present invention at A in FIG. 2 in an electromagnetic state;

in the figure, 1, an electromagnetic component, 11, an outer electromagnetic component, 12, an inner electromagnetic component and 2, a heating component.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to FIGS. 1-3, the present invention provides a technical solution of an electrical memory ablation catheter for radial artery, comprising:

An electromagnetic member 1, which is in a normal state when not energized, wherein the electromagnetic member 1 is used for entering radial artery in the normal state, the electromagnetic member 1 is in an electromagnetic state after being energized, the electromagnetic member 1 is used for changing magnetism in the electromagnetic state, and a main body of the electromagnetic member 1 is curled and deformed;

The heating element 2 is used for releasing heat and generating deformation along with the deformation of the electromagnetic member 1 when the electromagnetic member 1 is in an electromagnetic state so as to enter a radio frequency ablation state.

In this embodiment, by arranging the electromagnetic member 1, it becomes gentle line shape under the non-energized state, make the pipe can smoothly get into radial artery blood vessel smoothly, reduce radial artery access puncture number of times, reduce radial artery puncture complication, and the magnetism change in the electromagnetic member 1 after the energization, receive the effect of magnetic force to drive its inside heating element 2 crooked into the heliciform, and make heating element 2 expose and generate heat, get into the radio frequency ablation state, further carry out radio frequency treatment.

Specifically, when the electromagnetic member 1 is in a normal state, the electromagnetic member 1 and the internal heating element 2 thereof are in a straight line shape.

In this embodiment, when the electromagnetic member 1 is in a normal state, the internal stress is balanced, and the whole catheter is in a gentle line shape so as to smoothly enter the radial artery.

Specifically, the heating element 2 is arranged in the electromagnetic member 1 to drive the heating element 2 to deform, and the heating temperature of the heating element 2 is less than 100 ℃.

In this embodiment, when the electromagnetic member 1 is deformed, the heat generating element 2 is deformed into a spiral shape in the electromagnetic member 1, and the melting point of the electromagnetic material is 100 ℃ or higher, so that the heat generating temperature of the heat generating element 2 is set to be less than 100 ℃.

Specifically, a plurality of arc-shaped grooves are uniformly formed on the electromagnetic component 1, so that the heating element 2 exposes out of heat release.

In this embodiment, an arc-shaped groove is provided to expose the heating element 2 from the catheter, so as to release heat and further perform radio frequency ablation treatment.

Specifically, the electromagnetic member 1 includes an outer electromagnetic member 11 and an inner electromagnetic member 12.

In the present embodiment, the electromagnetic member 1 can be regarded as a component composed of the outer electromagnetic member 11 and the inner electromagnetic member 12.

Specifically, when the electromagnetic member 1 is electrified in an electromagnetic state, the polarities of the magnetic poles of the outer electromagnetic pieces 11 positioned at two sides of the arc-shaped groove are the same, and the polarities tend to repel each other, so that the electromagnetic member 1 is curled.

In this embodiment, the magnetic poles on both sides of the arc-shaped groove at the outer electromagnetic member 11 have the same polarity due to electromagnetic induction, and have mutually repulsive magnetic forces.

Specifically, when the electromagnetic member 1 is electrified to be in an electromagnetic state, the polarities of the magnetic poles of the inner electromagnetic piece 12 positioned at two sides of the arc-shaped groove are opposite, and the magnetic poles have a mutual attraction trend, so that the electromagnetic member 1 is curled and deformed, and the distance between the side walls of the arc-shaped groove at the outer electromagnetic piece 11 is larger than the distance between the side walls of the arc-shaped groove at the inner electromagnetic piece 12.

In this embodiment, the magnetic poles on both sides of the arc-shaped groove are opposite in polarity at the inner electromagnetic member 12 due to electromagnetic induction, and have magnetic forces of attraction to each other, and the magnetic poles on both sides of the arc-shaped groove are identical in polarity at the outer electromagnetic member 11, and have magnetic forces of repulsion to each other.

Specifically, the electromagnetic member 1 is bent in a spiral shape by the magnetic force of the outer electromagnetic member 11 and the inner electromagnetic member 12.

In this embodiment, the electromagnetic member 1 generates magnetism on the inner and outer sides of the spiral structure due to electromagnetic induction, polarities on the outer sides of the spirals are the same, polarities on the inner sides of the spirals are different, polarities on the inner sides of the spirals are mutually exclusive, the pipes are attracted to each other, the stress direction is indicated by an arrow in fig. 3, after the power is off, the magnetism disappears, the pipes lose the force of bending into the spirals, and the pipes return to a straight shape.

Specifically, when the electromagnetic member 1 is bent into a spiral shape, the electromagnetic member 1 is close to one side of the axis of the spiral structure, and the corresponding external electromagnetic member 11 is far from one side of the axis of the spiral structure of the electromagnetic member 1.

In this embodiment, when the electromagnetic member 12 is bent in a spiral shape, the electromagnetic member 1 is located near one side of the axis of the spiral structure.

Specifically, the material of the electromagnetic member 1 includes iron-cobalt-nickel alloy.

In this embodiment, the electromagnetic member 1 may be formed by assembling multiple sections of iron-cobalt-nickel alloy wound by coils, and the iron-cobalt-nickel alloy wound by coils is wrapped by wrapping and packaging to wrap the heating element 2, or when the electromagnetic member 1 is not electrified, the polarities on both sides of the arc-shaped groove are the same or the same, the stress balance is in a straight line shape, after the electrification, the polarities change, the electromagnetic member 1 is bent and deformed, and in addition, when the electromagnetic member 1 is electrified, the polarities on both sides of the arc-shaped groove are as shown in fig. 3.

The electromagnetic component 1 is arranged, and in the non-energized state, the electromagnetic component 1 is in a gentle linear shape, so that the catheter can smoothly enter into a radial artery blood vessel, the radial artery access puncture times are reduced, the radial artery puncture complications are reduced, after the electromagnetic component 1 is energized, the magnetic poles on two sides of the arc-shaped groove are the same in polarity due to electromagnetic induction at the outer electromagnetic component 11, the poles on two sides of the arc-shaped groove are mutually repulsive, the poles on the electromagnetic component 12 are opposite in polarity, the poles on two sides of the arc-shaped groove are mutually attractive, the heating component 2 in the arc-shaped groove is driven to bend into a spiral shape under the action of magnetic force, the heating component 2 is exposed out through the arc-shaped groove to heat, radio frequency treatment is further carried out, the magnetism disappears after the power is off, the catheter loses the force of bending into the spiral shape, and the catheter is restored into a straight shape.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. An electrical memory ablation catheter for radial artery, comprising:

An electromagnetic member (1) in a normal state when not energized, wherein the electromagnetic member (1) is used for entering a radial artery in the normal state, the electromagnetic member (1) in an electromagnetic state after being energized, the electromagnetic member (1) is used for changing magnetism in the electromagnetic state, and a main body of the electromagnetic member (1) is curled and deformed;

The heating element (2) is used for releasing heat and generating deformation along with the deformation of the electromagnetic component (1) when the electromagnetic component (1) is in the electromagnetic state so as to enter a radio frequency ablation state;

a plurality of arc-shaped grooves are uniformly formed in the electromagnetic component (1) so that the heating piece (2) exposes out of heat for releasing;

the electromagnetic member (1) comprises an outer electromagnetic piece (11) and an inner electromagnetic piece (12);

When the electromagnetic component (1) is electrified and is in the electromagnetic state, the polarities of the magnetic poles of the outer electromagnetic pieces (11) positioned on the two sides of the arc-shaped groove are the same, and the magnetic poles tend to repel each other, so that the electromagnetic component (1) is curled and deformed;

When the electromagnetic component (1) is electrified to be in the electromagnetic state, the polarities of the magnetic poles of the inner electromagnetic parts (12) positioned on the two sides of the arc-shaped groove are opposite, and the magnetic poles have the mutual attraction trend, so that the electromagnetic component (1) is curled and deformed, and the distance between the side walls of the arc-shaped groove at the outer electromagnetic part (11) is larger than the distance between the side walls of the arc-shaped groove at the inner electromagnetic part (12).

2. An electrical memory ablation catheter for radial artery according to claim 1, wherein said electromagnetic member (1) and said heat generating element (2) are in a straight line shape when said electromagnetic member (1) is in said normal state.

3. The electrical memory ablation catheter for radial artery of claim 1, wherein the heating element (2) is arranged inside the electromagnetic component (1) to drive the heating element (2) to deform, and the heating temperature of the heating element (2) is less than 100 ℃.

4. An electrical memory ablation catheter for radial arteries according to claim 1 characterised in that the electromagnetic member (1) is bent into a spiral shape by the magnetic forces of the outer electromagnetic member (11) and the inner electromagnetic member (12).

5. An electrical memory ablation catheter for radial arteries according to claim 1, wherein the inner electromagnetic member (12) is the side of the electromagnetic member (1) which is close to the axis of the helical structure when the electromagnetic member (1) is bent into a helix, and the corresponding outer electromagnetic member (11) is the side of the electromagnetic member (1) which is far from the axis of the helical structure.

6. An electrical memory ablation catheter for radial arteries according to claim 1 characterised in that the material of the electromagnetic member (1) comprises iron cobalt nickel alloy.