An electrical memory ablation catheter suitable for radial artery

Abstract

The present invention discloses an electric memory ablation catheter suitable for radial artery, belonging to the technical field of medical devices. 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, and compared with the existing technology, the device can have a steering function without using a guide wire.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an electric memory ablation catheter suitable for radial arteries. Background Art

[0002] Radiofrequency ablation is a minimally invasive interventional therapy for local tumors. It has been proven to be an effective, safe, minimally invasive technology with few complications and accurate positioning for the treatment of malignant solid tumors. The fundamental principle of radiofrequency ablation is heat therapy. Radiofrequency is a high-frequency electromagnetic wave composed of alternating electric fields and magnetic fields. The energy generated by radiofrequency waves of 375kHz to 500kHz forms a closed circuit in the human body from the transmitter to the treatment electrode needle through the negative plate. Under the action of the alternating electric field formed by radiofrequency, charged ions and charged colloids vibrate at high speed, collide and rub against each other to generate heat energy, which increases the temperature of the tissue and causes coagulative necrosis. It is generally believed that when the temperature reaches (65±5)℃ or above, the tumor tissue can be destroyed to the greatest extent.

[0003] Compared with femoral artery access, radial artery access is associated with lower bleeding, vascular complication rates and mortality in high-risk populations (such as STEMI patients), and reduces treatment costs. The current catheter structure used for radiofrequency ablation technology mostly uses a coaxial structure with inner and outer catheters, an intermediate skeleton layer, a wire layer, and an electrode layer, each occupying a layer of space. Using such a structure will increase the outer diameter of the catheter, making the outer diameter larger than the inner diameter of the radial artery opening, making it impossible to achieve radial artery access.

[0004] For example, a flexible radiofrequency ablation catheter proposed in CN112773499A has an insulating catheter sleeved on a conductive capillary to form a circular tube; the conductive capillary passes through the open end of the conductive circular tube and penetrates into the closed end of the conductive circular tube, and the open end of the conductive circular tube is connected to the insulating catheter; the circulation of the cold medium takes away the excessively concentrated heat on the working end, i.e., the surface of the conductive circular tube and the nearby tissues, so that the diseased venous wall or the blood in the venous cavity does not adhere to the surface of the working end, and avoids carbonization on the surface of the working end, thereby reducing the operation time. However, the catheter is generally designed for femoral artery access, so that the outer diameter is larger than the inner diameter of the radial artery opening, and radial artery access cannot be achieved. Summary of the invention

[0005] The object of the present invention is to provide an electric memory ablation catheter suitable for the radial artery, so as to solve the problem raised in the above background technology that during use, the existing ablation catheters mostly adopt a coaxial structure of inner and outer catheters, middle skeleton layers, wire layers, and electrode layers. Such a structure will increase the outer diameter of the catheter, making the outer diameter larger than the inner diameter of the radial artery opening, making it impossible to achieve radial artery access.

[0006] To achieve the above object, the present invention provides the following technical solution: an electric memory ablation catheter suitable for radial artery, comprising:

[0007] The electromagnetic component has a normal state when not powered on, and is used to enter the radial artery in the normal state. The electromagnetic component has an electromagnetic state after being powered on, and its magnetism changes in the electromagnetic state, and the main body of the electromagnetic component is curled and deformed;

[0008] The heating element is used to release heat and deform in coordination with the deformation of the electromagnetic component when the electromagnetic component is in the electromagnetic state, so as to enter the radio frequency ablation state.

[0009] Preferably, when the electromagnetic component is in the normal state, the electromagnetic component and the heating element inside it are in a straight line shape.

[0010] Preferably, the heating element is arranged inside the electromagnetic component to drive the heating element to deform, and the heating temperature of the heating element is less than 100°C.

[0011] Preferably, a plurality of arc-shaped grooves are evenly formed on the electromagnetic component so that the heating element is exposed to release heat.

[0012] Preferably, the electromagnetic component includes an outer electromagnetic component and an inner electromagnetic component.

[0013] Preferably, when the electromagnetic component is energized and in the electromagnetic state, the magnetic poles of the outer electromagnetic component located on both sides of the arc-shaped groove have the same polarity and tend to repel each other, so that the electromagnetic component curls and deforms.

[0014] Preferably, when the electromagnetic component is energized and in the electromagnetic state, the magnetic poles of the inner electromagnetic component located on both sides of the arc-shaped groove have opposite polarities and tend to attract each other, so that the electromagnetic component curls and deforms, and the spacing between the side walls of the arc-shaped groove at the outer electromagnetic component is greater than the spacing between the side walls of the arc-shaped groove at the inner electromagnetic component.

[0015] Preferably, the electromagnetic component is bent into a spiral shape under the magnetic force of the outer electromagnetic component and the inner electromagnetic component.

[0016] Preferably, the inner electromagnetic component is a side of the electromagnetic component close to the axis of its spiral structure when the electromagnetic component is bent into a spiral shape, and the corresponding outer electromagnetic component is a side of the electromagnetic component away from the axis of its spiral structure.

[0017] Preferably, the material of the electromagnetic component includes iron-cobalt-nickel alloy.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By setting up the electromagnetic component, it is in a gentle linear shape when not powered, 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 enter the radial artery smoothly, reduce the number of radial artery access punctures, and reduce radial artery puncture complications.

[0020] 2. After the electromagnetic component is powered on, the internal magnetism changes, and the heating element inside is bent into a spiral shape under the action of the magnetic force, and the heating element is exposed to generate heat, and further radio frequency treatment is performed. Compared with the existing technology, this device has a steering function without the use of a guide wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the electromagnetic component of the present invention when it is in a normal state;

[0022] Figure 2 It is a front structural schematic diagram of the electromagnetic component of the present invention when it is in a normal state;

[0023] Figure 3 When the electromagnetic component of the present invention is in the electromagnetic state Figure 2 Polarity diagram at A in the middle;

[0024] In the figure: 1, electromagnetic component; 11, external electromagnetic component; 12, internal electromagnetic component; 2, heating component. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-3 The present invention provides a technical solution: an electric memory ablation catheter suitable for radial artery, comprising:

[0027] The electromagnetic component 1 has a normal state when it is not powered on. The electromagnetic component 1 is used to enter the radial artery in the normal state. The electromagnetic component 1 has an electromagnetic state after being powered on. When the electromagnetic component 1 is in the electromagnetic state, its magnetism changes and the main body of the electromagnetic component 1 is curled and deformed.

[0028] The heating element 2 is used to release heat and deform in coordination with the deformation of the electromagnetic component 1 when the electromagnetic component 1 is in the electromagnetic state, so as to enter the radio frequency ablation state.

[0029] In this embodiment, an electromagnetic component 1 is provided, which is in a flat linear shape when not powered on, so that the catheter can smoothly enter the radial artery, reduce the number of radial artery punctures, and reduce the complications of radial artery puncture. After the electromagnetic component 1 is powered on, the internal magnetism changes, and the heating element 2 inside it is bent into a spiral shape under the action of the magnetic force, and the heating element 2 is exposed to generate heat, entering the radio frequency ablation state, and further performing radio frequency treatment.

[0030] Specifically, when the electromagnetic component 1 is in a normal state, the electromagnetic component 1 and the heating element 2 therein are in a straight line shape.

[0031] In this embodiment, when the electromagnetic component 1 is in a normal state, the internal forces are balanced and the catheter as a whole is in a gentle linear shape so as to smoothly enter the radial artery.

[0032] Specifically, a heating element 2 is disposed 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°C.

[0033] In this embodiment, when the electromagnetic component 1 is deformed, the heating element 2 inside the electromagnetic component 1 is also deformed into a spiral shape. Since the melting point of the electromagnetic material is above 100°C, the heating temperature of the heating element 2 is set to be less than 100°C.

[0034] Specifically, a plurality of arc-shaped grooves are evenly formed on the electromagnetic component 1 so that the heating element 2 is exposed to release heat.

[0035] In this embodiment, an arc-shaped groove is provided to expose the heating element 2 to the catheter to release heat and further perform radiofrequency ablation treatment.

[0036] Specifically, the electromagnetic component 1 includes an outer electromagnetic component 11 and an inner electromagnetic component 12 .

[0037] In this embodiment, the electromagnetic component 1 can be regarded as a component consisting of an outer electromagnetic component 11 and an inner electromagnetic component 12 .

[0038] Specifically, when the electromagnetic component 1 is energized and in an electromagnetic state, the magnetic poles of the outer electromagnetic component 11 on both sides of the arc-shaped groove have the same polarity and tend to repel each other, so that the electromagnetic component 1 curls and deforms.

[0039] In this embodiment, due to electromagnetic induction, the magnetic poles on both sides of the arc-shaped groove at the outer electromagnetic member 11 have the same polarity and have a mutually repelling magnetic force.

[0040] Specifically, when the electromagnetic component 1 is energized and in an electromagnetic state, the magnetic poles of the inner electromagnetic component 12 located on both sides of the arc-shaped groove have opposite polarities and tend to attract each other, so that the electromagnetic component 1 curls and deforms, and the spacing between the side walls of the arc-shaped groove at the outer electromagnetic component 11 is greater than the spacing between the side walls of the arc-shaped groove at the inner electromagnetic component 12.

[0041] In this embodiment, due to electromagnetic induction, the magnetic poles on both sides of the arc-shaped groove at the inner electromagnetic component 12 have opposite polarities, and there is a magnetic force of mutual attraction. The magnetic poles on both sides of the arc-shaped groove at the outer electromagnetic component 11 have the same polarity, and there is a magnetic force of mutual repulsion.

[0042] Specifically, the electromagnetic component 1 is bent into a spiral shape by the magnetic force of the outer electromagnetic component 11 and the inner electromagnetic component 12 .

[0043] In this embodiment, the electromagnetic component 1 generates magnetism on the inner and outer sides of the spiral structure due to electromagnetic induction. The polarities of the outer sides of the spirals are the same and repel each other, while the polarities of the inner sides of the spirals are different and attract each other. The catheter is bent into a spiral shape, and the direction of the force is shown in FIG. Figure 3 As indicated by the upper arrow, after power is turned off, the magnetism disappears, the catheter loses the force to bend into a spiral shape, and the catheter returns to a straight shape.

[0044] Specifically, the inner electromagnetic component 12 is the side of the electromagnetic component 1 close to the axis of its spiral structure when the electromagnetic component 1 is bent into a spiral shape, and the corresponding outer electromagnetic component 11 is the side of the electromagnetic component 1 away from the axis of its spiral structure.

[0045] In this embodiment, the inner electromagnetic part 12 is the side of the electromagnetic component 1 close to the axis of the spiral structure when the electromagnetic component 1 is bent into a spiral shape.

[0046] Specifically, the material of the electromagnetic component 1 includes an iron-cobalt-nickel alloy.

[0047] In this embodiment, the electromagnetic component 1 can be assembled from multiple sections of iron-cobalt-nickel alloy wound by coils, and the iron-cobalt-nickel alloy wound by the coils is wrapped and packaged to wrap the heating element 2, or when the electromagnetic component 1 is not powered on, the polarities on both sides of the arc groove are the same or the same, and the force balance is in a straight line. After power is turned on, the polarity changes, and the electromagnetic component 1 bends and deforms. In addition, when the electromagnetic component 1 is powered on, the polarities on both sides of the arc groove are as follows: Figure 3 shown.

[0048] The working principle and use process of the present invention are as follows: by setting an electromagnetic component 1, which is in a gentle linear shape when not powered on, the catheter can smoothly enter the radial artery, reduce the number of radial artery access punctures, and reduce radial artery puncture complications. After the electromagnetic component 1 is powered on, the internal magnetism changes. Due to electromagnetic induction, the magnetic poles on both sides of the arc-shaped groove at the outer electromagnetic component 11 have the same polarity and repel each other, and the magnetic poles on both sides of the arc-shaped groove at the electromagnetic component 12 have opposite polarity and attract each other. The heating element 2 inside is driven by the magnetic force to bend into a spiral shape, and the heating element 2 is exposed through the arc-shaped groove to generate heat, and further radio frequency treatment is performed. After power is cut off, the magnetism disappears, the catheter loses the force to bend into a spiral shape, and the catheter returns to a straight shape.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrical memory ablation catheter suitable for radial artery, characterized in that: include: The electromagnetic component (1) has a normal state when not energized, and the electromagnetic component (1) is used to enter the radial artery in the normal state. The electromagnetic component (1) has an electromagnetic state after being energized, and the electromagnetic component (1) has a magnetic property change in the electromagnetic state, and the main body of the electromagnetic component (1) is curled and deformed; A heating element (2) is used for releasing heat and deforming in coordination with the deformation of the electromagnetic component (1) when the electromagnetic component (1) is in the electromagnetic state, so as to enter a radiofrequency ablation state; The electromagnetic component (1) is evenly provided with a plurality of arc-shaped grooves so that the heating element (2) is exposed to release heat; The electromagnetic component (1) comprises an outer electromagnetic component (11) and an inner electromagnetic component (12); When the electromagnetic component (1) is energized and in the electromagnetic state, the magnetic poles of the outer electromagnetic component (11) located on both sides of the arc-shaped groove have the same polarity and tend to repel each other, so that the electromagnetic component (1) curls and deforms; When the electromagnetic component (1) is energized and in the electromagnetic state, the magnetic poles of the inner electromagnetic component (12) located on both sides of the arc-shaped groove have opposite polarities and tend to attract each other, so that the electromagnetic component (1) curls and deforms, and the spacing between the side walls of the arc-shaped groove at the outer electromagnetic component (11) is greater than the spacing between the side walls of the arc-shaped groove at the inner electromagnetic component (12).

2. The electrical memory ablation catheter suitable for radial artery according to claim 1, characterized in that: When the electromagnetic component (1) is in the normal state, the electromagnetic component (1) and the heating element (2) inside it are in a straight line shape.

3. The electric memory ablation catheter suitable for radial artery according to claim 1, characterized in that: 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°C.

4. The electrical memory ablation catheter suitable for radial artery according to claim 1, characterized in that: The electromagnetic component (1) is bent into a spiral shape under the action of the magnetic force of the outer electromagnetic component (11) and the inner electromagnetic component (12).

5. The electric memory ablation catheter suitable for radial artery according to claim 1, characterized in that: The inner electromagnetic component (12) is the side of the electromagnetic component (1) close to the axis of its spiral structure when the electromagnetic component (1) is bent into a spiral shape, and the corresponding outer electromagnetic component (11) is the side of the electromagnetic component (1) away from the axis of its spiral structure.

6. The electric memory ablation catheter suitable for radial artery according to claim 1, characterized in that: The material of the electromagnetic component (1) includes an iron-cobalt-nickel alloy.

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