CN217660104U - Multi-electrode ablation catheter for PFA pulse ablation - Google Patents

Abstract

The utility model discloses a PFA pulse ablation is with multielectrode ablation catheter, including the pipe shaft, its characterized in that: the tube body; the spiral electrode tip is integrally covered on the pipe body, extends from the head end of the pipe body to the pipe body direction and is gradually increased; the spiral electrode head is provided with a plurality of electrodes, and the number of electric fields formed by the electrodes is larger than that of the electrodes. The head end of the ablation tube of the device is in a spiral shape, the covered area is larger, an electric field can be formed between each positive electrode and each negative electrode, the wider the area which can be covered by the electric field is, the larger the ablation area is correspondingly, and the ablation efficiency is improved.

Description

Multi-electrode ablation catheter for PFA pulse ablation

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to PFA pulse is ablated and is ablated pipe with multiple electrode.

Background

In interventional therapy of Atrial Fibrillation (AF), pulmonary Vein Isolation (PVI) is a standard operation, and currently, there are pulmonary vein Ablation methods of different energies, including radio frequency Ablation (RF Ablation), cryoablation and pulse Ablation (PFA), and the Ablation end points of different energies are afferent and efferent bidirectional blockages to achieve internal and external potentials of pulmonary veins, and the existing pulse Ablation catheters have the following disadvantages:

(1) The traditional radio frequency ablation has low efficiency, and causes long operation time, so that the operation has potential safety problem;

(2) The traditional radiofrequency ablation catheter cannot be well attached to the vestibule of the heart (pulmonary vein);

(3) The same kind of pulse ablation catheters cannot record electric potentials simultaneously and ablate simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects in the prior art, and provides a multi-electrode ablation catheter for PFA pulse ablation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a multi-electrode ablation catheter for PFA pulse ablation, characterized by: the method comprises the following steps:

a tube body;

the spiral electrode tip is integrally covered on the pipe body, extends from the head end of the pipe body to the pipe body direction and is gradually increased;

the spiral electrode head is provided with a plurality of electrodes, and the number of electric fields formed by the electrodes is larger than that of the electrodes.

As a further description of the above technical solution: the pipe body and the spiral electrode tip are connected into a whole, the pipe body is a bendable pipeline, and the bending angle is 0-180 degrees.

As a further description of the above technical solution: the spiral electrode head is provided with a plurality of positive electrodes and a plurality of negative electrodes, and the number of the positive electrodes and the negative electrodes is not less than 10.

As a further description of the above technical solution: the spiral electrode head comprises a first area conduit, a second area conduit and a third area conduit, a plurality of electrodes are uniformly distributed outside the first area conduit, the second area conduit and the third area conduit, and the number of the electrodes is gradually increased.

As a further description of the above technical solution: the diameters of the first zone conduit, the second zone conduit, and the third zone conduit gradually increase.

As a further description of the above technical solution: the electrodes external to the first zone conduit, the second zone conduit, and the third zone conduit are independently controlled.

As a further description of the above technical solution: the lengths of the positive electrode and the negative electrode are 1-5mm, and the positive electrode and the negative electrode are wrapped outside the spiral electrode head.

As a further description of the above technical solution: the positive electrode and the negative electrode are made of metal materials.

As a further description of the above technical solution: and the outer parts of the leads connected with the positive electrode and the negative electrode are wrapped with insulating layers, and the leads are positioned in the tubes of the spiral electrode heads.

As a further description of the above technical solution: one of the positive electrodes and one of the negative electrodes constitute a pulse unit.

The utility model discloses following beneficial effect has:

1. the utility model discloses a head end of ablation pipe is the helical shape, and the area that covers is bigger, all can form an electric field between each positive and negative electrode, and 20 electrodes form 50 crisscross electric fields, and the area that the electric field can cover is wider, melts the area corresponding big more, improves the efficiency of melting.

2. The utility model discloses a head end of ablation pipe is helical shape, inner circle, well circle, and the outer lane, three kinds of diameters can adapt to different patient's different pulmonary veins's thickness and spatial structure, consequently can improve and paste the efficiency of pasting the tissue, has reduced the time of doctor operation pipe when efficiency improves, reduces the latent complication that probably takes place of patient, safety more.

3. The utility model discloses an inner circle, the well circle of spiral electrode, outer lane electrode detachable independent control can accomplish the different functions of electrode realization of different positions. For example, the inner ring electrode records the electric potential, and the middle ring and the outer ring electrode emit pulse energy to perform ablation.

4. The utility model discloses a wholly be a pipe, accomplish simultaneously and record the effect of electric potential and granting pulse therapy, need not to use other pipes to assist the operation, reduce the operation cost.

Drawings

Fig. 1 is a side view of a multi-electrode ablation catheter for PFA pulse ablation as set forth in the present invention;

fig. 2 is a schematic view of the spiral electrode tip of the multi-electrode ablation catheter for PFA pulse ablation according to the present invention in a planar shape.

Illustration of the drawings:

1. a tube body; 2. a helical electrode tip; 20. a regional conduit; 21. a first zone conduit; 22. a second zone conduit; 23. a third zone conduit; 3. an electrode; 31. a positive electrode; 32. and a negative electrode.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, the present invention provides an embodiment: the multi-electrode ablation catheter for PFA pulse ablation comprises a catheter body 1;

the spiral electrode tip 2 is integrally covered on the tube body 1, the spiral electrode tip 2 extends from the head end of the tube body 1 to the tube body 1 and gradually increases, the spiral electrode tip 2 comprises a first area conduit 21 with an inner diameter gradually increasing, a second area conduit 22 and a third area conduit 23, a positive electrode 31 and a negative electrode 32 are arranged outside the spiral electrode tip 2 in a staggered mode, four electrodes are uniformly distributed on the first area conduit 21, the center of the first area conduit 21 is fixedly connected with the near end of the tube body 1, the diameter of the first area conduit 21 is 15mm, six electrodes 3 are uniformly distributed on the second area conduit 22, the diameter of the second area conduit 22 is 20mm, ten electrodes 3 are uniformly distributed on the third area conduit 23, and the diameter of the third area conduit 23 is 25mm, when the head end of the spiral electrode tip 2, namely, enters a pulmonary vein, the diameters of the first area conduit 21, the second area conduit 22 and the third area conduit 23 are different, so that ablation and ablation space structures of different patients can be used, and the tissue efficiency of the pulmonary vein is improved;

the spiral electrode head 2 is formed with a plurality of electrodes 3, the number of electric fields formed by the plurality of electrodes 3 is larger than that of the electrodes, wherein the tube body 1 is a linear pipeline, the spiral electrode head 2 is a planar spiral structure similar to a mosquito coil structure, and when the spiral electrode head 2 is extruded, the planar spiral structure is converted into a three-dimensional spiral structure, namely, the structure shown in fig. 1 is transformed from fig. 2.

For example, for a patient with a narrow pulmonary vein, the first region catheter 21 can be attached to the vestibule of the pulmonary vein, for a patient with a thick pulmonary vein, the third region catheter 23 can be attached to the vestibule of the pulmonary vein, and when the spiral electrode head 2 is squeezed, the spiral electrode head is changed into a three-dimensional spiral structure, the contact area with the landscape surface is large enough, the region covered by electric field energy is larger, and the ablation effect is better.

Furthermore, a positive electrode 31 and a negative electrode 32 form a pulse unit to implement pulse ablation, and multiple pairs of electrodes 3 can simultaneously deliver pulses, the positive and negative electrodes 3 outside the first area catheter 21, the second area catheter 22 and the third area catheter 23 can be separately and independently controlled, and different functions can be implemented by the electrodes at different positions, for example, the electrode recording potential of the first area catheter 21 and the pulse energy delivered by the electrodes of the second area catheter 22 and the third area catheter 23 to perform ablation.

Further, the tube body 1 and the spiral electrode tip 2 are connected as an organic whole, and the tube body 1 is the pipeline of just buckling, and the angle of buckling is 0 ~ 180, and an ablation catheter can accomplish simultaneously record the effect of electric potential and distribution impulse therapy, need not to use other pipe to assist the operation, reduces the operation cost.

Furthermore, the number of the positive electrodes 31 and the negative electrodes 32 arranged on the spiral electrode head 2 is 20, an electric field can be formed between each positive electrode and each negative electrode, 50 staggered electric fields are formed by a plurality of 20 electrodes, the wider the area of the electric field is, the larger the ablation area is correspondingly, and thus the ablation efficiency is improved.

Further, the length of the positive electrode 31 and the negative electrode 32 is 1 to 5mm, preferably 4mm. And is wrapped around the outside of the helical electrode tip 2.

Further, the material of the positive electrode 31 and the negative electrode 32 is a metal material, preferably gold or platinum-iridium alloy.

Further, the exterior of the lead wires connected to the positive electrode 31 and the negative electrode 32 is wrapped with an insulating layer, and the lead wires are disposed within the tube of the spiral electrode tip 2.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (10)

1. A multi-electrode ablation catheter for PFA pulse ablation, characterized by: the method comprises the following steps:

a tube body (1);

the spiral electrode tip (2) is integrally covered on the pipe body (1), and the spiral electrode tip (2) extends from the head end of the pipe body (1) to the direction of the pipe body (1) and is in a gradually increasing trend;

the spiral electrode head (2) is provided with a plurality of electrodes (3), and the number of electric fields formed by the electrodes (3) is larger than that of the electrodes (3).

2. The multi-electrode ablation catheter for PFA pulse ablation according to claim 1, wherein: the pipe body (1) and the spiral electrode tip (2) are connected into a whole, the pipe body (1) is a bendable pipeline, and the bending angle is 0-180 degrees.

3. The multi-electrode ablation catheter for PFA pulse ablation according to claim 1, wherein: the spiral electrode head (2) is provided with a plurality of electrodes (3), and the number of the electrodes (3) is not less than 8.

4. The multi-electrode ablation catheter for PFA pulse ablation according to claim 1, wherein: the spiral electrode head (2) comprises a plurality of zone conduits (20) which are connected in sequence, and the number of the electrodes (3) which are uniformly distributed on the outer part of the spiral electrode head is gradually increased in sequence.

5. The multi-electrode ablation catheter for PFA pulse ablation according to claim 4, wherein: the area conduits (20) have a gradually increasing helical diameter.

6. The multi-electrode ablation catheter for PFA pulse ablation according to claim 4, wherein: the electrodes outside the zone conduits (20) are independently controlled.

7. The multi-electrode ablation catheter for PFA pulse ablation according to claim 1, wherein: the length of the electrode (3) is 1-5mm, and the electrode is wrapped outside the spiral electrode head (2).

8. A multi-electrode ablation catheter for PFA pulse ablation according to claim 3, characterized in that: the electrode (3) is made of metal.

9. A multi-electrode ablation catheter for PFA pulse ablation according to claim 3, characterized in that: an insulating layer is wrapped outside a lead connected with the electrode (3), and the lead is positioned in the pipe of the spiral electrode head (2).

10. The multi-electrode ablation catheter for PFA pulse ablation according to claim 1, wherein: the electrodes (3) comprise positive electrodes (31) and negative electrodes (32), and one positive electrode (31) and one negative electrode (32) form a pulse unit.

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