Electrophysiological mapping catheter device

Abstract

This invention discloses an electrophysiological mapping catheter device. The device includes a catheter, an adjustment handle, electrodes, and a connector. The catheter comprises an adjustment tube and multiple branch tubes, with each branch tube having a connection end and a detection end at its two ends. The detection ends are staggered and each detection end is equipped with an electrode. Each connection end is connected to the adjustment tube. The adjustment tube is connected to the adjustment handle and its bending angle can be adjusted by the adjustment handle. The connector is located on the adjustment handle and electrically connected to the electrodes. The connector also connects to an electrophysiological system to transmit the electrical signals detected by the electrodes. This electrophysiological mapping catheter device can adapt to irregular cardiac chambers in three-dimensional space and can record electrophysiological signals from numerous folds or loose grooves on the surface of the cardiac chambers. It can also generate more accurate three-dimensional mapping images in a shorter time, reducing the difficulty for doctors to identify the images and facilitating surgical procedures.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to an electrophysiological mapping catheter device. Background Technology

[0002] Electrophysiological mapping catheters play a crucial role in the field of cardiac electrophysiology. They are used to record electrophysiological signals within the body, thereby identifying abnormal lesions and guiding ablation. The mapping catheters are also used to verify the treatment's effectiveness after ablation. With the development of cardiac electrophysiology and related medical devices, the application of electrophysiological mapping catheters is becoming increasingly widespread. Multi-site simultaneous endocardial mapping is a newly emerging technique applied to mapping various complex arrhythmias and catheter radiofrequency ablation.

[0003] Three-dimensional mapping systems can display three-dimensional anatomical images and electrocardiogram (ECG) signals within the cardiac chambers. Due to their unique safety, accuracy, and efficiency, they are now widely used in the clinical field of cardiac electrophysiology. However, current three-dimensional mapping systems have certain limitations in practical applications, including the following reasons: The spatial structure of the cardiac chambers is not a regular shape; the size of the human heart varies, and there are significant individual differences. Furthermore, the physiological structure within the heart is complex, and the inner surface of the cardiac chambers is not smooth, containing uneven grooves or loose pits. For the grooves formed by the pectinate muscles in the atria and the reticular loose structure formed by the trabecular muscles in the ventricles, it is difficult for the tip of the current electrophysiological mapping catheter to achieve sufficient electrode contact. Therefore, it is impossible to obtain electrophysiological signals from these complex anatomical structures, and it cannot fully meet the needs of intracardiac electrophysiological diagnosis and treatment. It is evident that traditional three-dimensional mapping systems cannot achieve sufficient contact with irregular cardiac chamber structures, uneven inner walls, and confined spaces such as proximal and distal dead zones, making it difficult to accurately record electrical signals. Summary of the Invention

[0004] Therefore, it is necessary to provide an electrophysiological mapping catheter device. This electrophysiological mapping catheter device can adapt to the irregular three-dimensional space of the heart chamber, can record the electrophysiological signals of the numerous folds or loose grooves on the inner surface of the heart chamber, and can form more accurate three-dimensional mapping images in a shorter time, reducing the difficulty of identification for doctors and facilitating surgical operations.

[0005] An electrophysiological mapping catheter device includes a catheter, an adjusting handle device, electrodes, and a connector. The catheter includes an adjusting tube and multiple branch tubes, with a connection end and a detection end formed at both ends of each branch tube. The multiple detection ends are staggered and each detection end is provided with an electrode. Each connection end is connected to the adjusting tube. The adjusting tube is connected to the adjusting handle device and its bending angle can be adjusted by the adjusting handle device. The connector is disposed on the adjusting handle device and electrically connected to the electrodes. The connector is also used to connect to an electrophysiological system to transmit the electrical signals detected by the electrodes.

[0006] In one embodiment, the end faces of the detection ends of the plurality of branch pipes are distributed on the same curved surface.

[0007] In one embodiment, the surface is a sphere, a partial sphere, an ellipsoid, or a partial ellipsoid.

[0008] In one embodiment, the axial angle between the branch pipe and the regulating pipe is 10°-180°.

[0009] In one embodiment, the branch tube is flexible and has shape memory capability.

[0010] In one embodiment, the plurality of branch pipes are divided into at least two groups, and the branch pipes in each group are axially symmetrical about the axis of the regulating pipe.

[0011] In one embodiment, the adjustment tube includes a distal end connected to the branch tube and a proximal end connected to the adjustment handle device. The electrophysiological mapping catheter device also includes an adjustment cable, one end of which is connected to the distal end and the other end of which is connected to the adjustment handle device.

[0012] In one embodiment, the distal end is flexible.

[0013] In one embodiment, the distal end has a first lumen, one end of which opens onto the end face of the distal end and the other end is used to communicate with an infusion tube disposed in the proximal end, the infusion tube extending to the adjusting handle device and communicating with an extension tube connected to the adjusting handle device for connecting an external infusion pump.

[0014] In one embodiment, the distal end further has a second lumen, one end of which is connected to the distal end and the other end of which is connected to the proximal end. One end of the adjusting cable is connected to the distal end and the other end passes through the second lumen and is connected to the adjusting handle device.

[0015] In one embodiment, the distal end further has a third lumen, one end of which is connected to the branch tube and the other end of which is connected to the proximal end. The electrode wire passes through the third lumen, the proximal end and the adjusting handle device in sequence and is then connected to the connector.

[0016] In one embodiment, the electrode is a ring electrode with a width of 0.2 to 2 mm, an outer diameter of 0.3 to 1 mm, and a spacing of 1 to 10 mm. Each ring electrode has an inner surface connected to mutually insulated wires that are connected to the connector.

[0017] The electrophysiological mapping catheter device of this invention can adapt to irregular cardiac chambers in three-dimensional space and record electrophysiological signals from numerous folds or loose grooves on the inner surface of the cardiac chambers. It can also generate more accurate three-dimensional mapping images in a shorter time, reducing the difficulty for doctors to identify the images and facilitating surgical procedures. This electrophysiological mapping catheter device can fully contact irregular cardiac chamber structures, rough inner walls, and confined spaces such as proximal and distal dead angles, thereby accurately recording electrical signals. The multiple branch tubes of the electrophysiological mapping catheter device provided by this invention have a divergent three-dimensional spatial structure, with staggered distribution of the detection ends. This staggered distribution of the detection ends can adapt to various irregular cardiac chamber structures, and the electrodes at the detection ends can easily reach various confined spaces and fine structures within the cardiac chambers.

[0018] Compared with the prior art, the electrophysiological mapping catheter device of this invention has multiple branch tubes that are divergent and whose angles are adjustable. The large number of branches and electrodes increases the reliability of the electrodes in contact with irregular cardiac chambers and folds or grooves in the heart wall during surgery, improves the precision and accuracy of intracardiac electrical signal acquisition, shortens the operation time, makes the operation safer and more efficient, and greatly facilitates the surgeon. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the electrophysiological mapping catheter device according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 The diagram shows a spherical arrangement of the branch tubes of the electrophysiological mapping catheter device.

[0021] Figure 3 for Figure 1 A schematic diagram of the electrophysiological mapping catheter device projected along direction A;

[0022] Figure 4 for Figure 1 The diagram shows a hemispherical arrangement of the branch tubes of the electrophysiological mapping catheter device.

[0023] Figure 5 for Figure 4 A schematic diagram of the electrophysiological mapping catheter device projected along direction A;

[0024] Figure 6 for Figure 1 The diagram shows the electrodes on the branch tube of the electrophysiological mapping catheter device.

[0025] Figure 7 for Figure 1 The diagram shows a cross-sectional view of the adjustment tube of the electrophysiological mapping catheter device.

[0026] Explanation of reference numerals in the attached figures

[0027] 10. Electrophysiological mapping catheter device; 100. Branch tube; 110, 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, 110i, 110A, 110B, 110C, 110D, 110E, 110F, 110G, 110H, 110I. Detection end; 120. Connection end; 200. Adjustment tube; 210. Distal end; 211. First lumen; 212. Second lumen; 213. Third lumen; 214. Outer tube; 215. Intermediate reinforcing metal layer; 216. Inner tube; 220. Proximal end; 300. Adjustment handle device; 400. Electrode; 500. Connector; 600. Lead wire; 700. Extension tube; 800. Luer connector. Detailed Implementation

[0028] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0029] In the description of this invention, it should be understood that the terms used in this invention, such as "center," "upper," "lower," "bottom," "inner," and "outer," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] It should be understood that the terms "first," "second," etc., are used in this invention to describe various types of information, but these terms are not limited to them; they are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two elements. That is, when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Please see Figure 1 As shown, one embodiment of the present invention provides an electrophysiological mapping catheter device 10.

[0034] An electrophysiological mapping catheter device 10 includes a catheter, an adjustment handle device 300, an electrode 400, and a connector 500. The catheter includes a branch tube 100 and an adjustment tube 200.

[0035] Please see Figure 1 As shown, there are multiple branch pipes 100. Each branch pipe 100 has a detection end 110 and a connection end 120 at both ends. The multiple detection ends 110 are staggered. Please refer to... Figure 2 As shown, each detection end 110 is equipped with an electrode 400. The connection end 120 is connected to the regulating tube 200.

[0036] The regulating tube 200 is flexible and is also connected to the regulating handle device 300, which can adjust the bending angle of the regulating tube 200.

[0037] The connector 500 is disposed on the adjustment handle device 300 and electrically connected to the electrode 400. The connector 500 is also used to connect to the electrophysiological system to transmit the electrical signal detected by the detection end 110.

[0038] In one specific example, the end faces of multiple detection ends 110 are distributed at different positions on the same curved surface. It should be noted that this curved surface is a virtual surface, referring to a virtual surface composed of the end faces of multiple detection ends 110. When the curved surface is a sphere, the sphere is the circumscribed sphere of the end faces of the multiple detection ends 110.

[0039] In one specific example, the surface is a sphere, a partial sphere, an ellipsoid, or a partial ellipsoid. For example, in one embodiment, all the detection ends 110 are distributed at different positions on the same sphere; in another embodiment, all the detection ends 110 are distributed at different positions on the same hemisphere.

[0040] In one specific example, the branch pipes 100 are divided into at least two groups, with the branch pipes 100 in each group symmetrically distributed about the axis of the regulating pipe 200. Specifically, the branch pipes 100 in each group are circumferentially symmetrically distributed about the axis of the regulating pipe 200. Circumferential symmetry means that the branch pipes 100 in each group are distributed on the same circumferential surface with the axis of that circumferential surface as the axis of symmetry, for example, an umbrella-shaped symmetrical distribution. The number of branch pipes 100 includes two to sixteen, and they can be divided into two to eight groups, with the branch pipes 100 in each group being circumferentially symmetrically distributed with respect to the axis of the regulating pipe 200. For example, in one embodiment, the number of branch pipes 100 is nine, and the nine branch pipes 100 are divided into three groups, each group containing three branch pipes 100, with the three branch pipes 100 in each group being circumferentially distributed. It is easy to understand that in other embodiments, the number of branch pipes 100 can also be other numbers, and the number of branch pipes 100 in each group can also be two, four, etc., which will not be listed here.

[0041] In one specific embodiment, see Figure 2 and 3As shown, this embodiment illustrates nine branch tubes 100, which are divided into three groups, each containing three branch tubes 100. The detection ends 110 of the nine branch tubes 100 are numbered sequentially as 110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, and 110i in a counter-clockwise direction. The detection ends (110a, 110b, 110c, 110d, 110e, 110f, 110g, 110h, and 110i) of the nine branch tubes 100 are symmetrical along the axial direction. Among them, 110a, 110d, and 110g form a group with an angle of 60° to the axis of the regulating tube 200; 110b, 110e, and 110h form a group with an angle of 110° to the axis of the regulating tube 200; and 110c, 110f, and 110i form a group with an angle of 150° to the axis of the regulating tube 200. In this embodiment, the lengths of each branch tube 100 are equal, and the detection ends of the nine branch tubes 100 are arranged in a spherical structure, forming a dandelion-like shape.

[0042] In another specific embodiment, see Figure 4 and 5 As shown, this embodiment illustrates nine branch tubes 100, which are divided into three groups, each containing three branch tubes 100. The detection ends of the nine branch tubes 100 are numbered sequentially as 110A, 110B, 110C, 110D, 110E, 110F, 110G, 110H, and 110I in a counter-clockwise direction. The detection ends (110A, 110B, 110C, 110D, 110E, 110F, 110G, 110H, and 110I) of the nine branch tubes 100 are symmetrical along the axial direction. In this embodiment, 110A, 110D, and 110G form a group with an angle of 110° to the axis of the regulating tube 200; 110B, 110E, and 110F form a group with an angle of 130° to the axis of the regulating tube 200; and 110C, 110F, and 110I form a group with an angle of 160° to the axis of the regulating tube 200. In this embodiment, all branch tubes 100 are of equal length, and the detection ends of the nine branch tubes 100 are generally hemispherical.

[0043] In one specific example, the axial angle between the branch pipe 100 and the regulating pipe 200 is 10°-180°. For example, in one embodiment, the axial angle between the branch pipe 100 and the regulating pipe 200 is 10°; in another embodiment, the axial angle between the branch pipe 100 and the regulating pipe 200 is 90°. In yet another embodiment, the axial angle between the branch pipe 100 and the regulating pipe 200 is 160°. The axial angle between the branch pipe 100 and the regulating pipe 200 can be adjusted according to actual needs.

[0044] In one specific example, the branch tube 100 is flexible and can be retracted by an external force and reset when the external force dissipates. The detection end 110 of the branch tube 100 is generally soft and has high elasticity. Furthermore, the branch tube 100 also has shape memory capability. The detection end 110 can be retracted into the sheath. When pushed out of the sheath, each detection end 110 can naturally diverge to form a pre-set spherical, hemispherical or ellipsoidal shape.

[0045] In one specific example, the adjustment tube includes a distal end 210 connected to the branch tube 100 and a proximal end 220 connected to the adjustment handle device 300. The electrophysiological mapping catheter device 10 also includes an adjustment cable. One end of the adjustment cable is connected to the distal end 210, and the other end is connected to the adjustment handle device 300. The adjustment cable can be moved by operating a controller arranged in the adjustment handle device 300. The movement of the adjustment cable causes the distal end 210 to bend, thus adjusting the bending angle of the distal end 210.

[0046] In one specific example, the distal end 210 is flexible. The distal end 210 can be bent as needed by adjusting the handle device 300.

[0047] See Figure 7 As shown, in one specific example, the distal end 210 has a first lumen 211, one end of which opens into the distal end 210 and the other end is used to communicate with an infusion tube located on the side or tail of the adjusting handle device 300. A Luer connector 800 is connected to the end of the infusion tube. In use, the infusion pump is connected to the Luer connector 800 to infuse liquid at a certain flow rate, and the infusion liquid is discharged from the opening of the first lumen 211 located at the distal end 210.

[0048] In one specific example, the infusion tube extends to the adjusting handle device 300 and communicates with the extension tube 700 for connecting an external infusion pump connected to the adjusting handle device 300.

[0049] See Figure 7 As shown, in one specific example, the distal end 210 has a second lumen 212. One end of the second lumen 212 is connected to the distal end and the other end is connected to the proximal end 220. One end of the adjusting cable is connected to the distal end and the other end passes through the second lumen 212 and is connected to the adjusting handle device 300.

[0050] See Figure 7As shown, in one specific example, the distal end 210 also has a third lumen 213. One end of the third lumen 213 is connected to the branch pipe 100 and the other end is connected to the proximal end 220. The wire 600 of the electrode 400 passes through the third lumen 213, the proximal end 220 and the adjusting handle device 300 in sequence to connect to the connector 500.

[0051] Furthermore, the regulating pipe 200 includes a three-layer structure, comprising an outer pipe 214, a middle reinforcing metal layer 215, and an inner pipe 216. The aforementioned first cavity 211, second cavity 212, and third cavity 213 are assembled within the inner pipe 216.

[0052] In one specific example, the branch tube 100 is made of one or more of polyimide, polyether, polyester, nylon and their copolymers, and the branch tube 100 is a single-lumen thin-walled tube without an embedded metal reinforcing layer.

[0053] The regulating pipe 200 is embedded with stainless steel wire mesh to give the branch pipe 100 good torsion control, bending resistance and flexibility. The stainless steel wire mesh is woven from 16 or 32 stainless steel wires with a diameter of 0.02-0.1 mm, and the pore density of the stainless steel wire mesh is 20-100 PPI.

[0054] In one specific example, the material used to prepare the regulating tube 200 is selected from one or more of polyimide, polyether, polyester, nylon and their copolymers.

[0055] See Figure 6 As shown, in one specific example, electrode 400 is a ring electrode 400 with a width of 0.2 to 2 mm and an outer diameter of 0.3 to 1 mm. The electrode spacing between adjacent ring electrodes 400 is 1 to 10 mm. Each ring electrode 400 has an inner surface connected to a wire 600 that is mutually insulated and connected to the connector 500.

[0056] A small hole is made on the surface of the detection end 110 at the position where the electrode 400 is fixed. This small hole is used for one end of the wire 600 to pass through and make an electrical connection with the inner wall of the electrode 400.

[0057] Furthermore, conductor 600 is enameled wire, with the core material being any metal with high conductivity such as copper, gold, silver, or nickel, and its outer surface contains an insulating layer. Conductor 600 has a diameter of 0.05–0.20 mm, and the insulating layer is made of one or more of the following materials: polyimide resin, polyurethane resin, polyester resin, polyesterimide, polyamide-imide, and composite polyesterimide.

[0058] Preferably, in one embodiment, the electrode 400 is made of materials such as platinum, platinum-iridium alloy, or gold.

[0059] In one specific example, the spacing between the ring electrodes 400 is equal.

[0060] When in use, the electrophysiological mapping catheter device 10 of the present invention includes the following steps:

[0061] (1) Puncture the femoral vein on one side and insert a guidewire catheter.

[0062] (2) Insert the interatrial septum puncture sheath and puncture the interatrial septum.

[0063] (3) Insert the electrophysiological mapping catheter device 10 into the heart chamber through the puncture sheath, and connect the connector 500 to the electrophysiological system, such as a multi-channel recorder. Continue to push the electrophysiological mapping catheter device 10 so that the electrode 400 on the branch tube 100 is in contact with the inner wall of the heart chamber. The detection end 110 of the branch tube 100 and the electrode 400 on its outer wall can extend into the folds or grooves of the pectinate muscle or trabecular muscle in the heart chamber. At this time, the bending shape of the distal end 210 of the adjustment tube 200 can be changed by adjusting the handle device 300 to make the electrode 400 of the detection end 110 of the branch tube 100 more fully contact the heart chamber wall.

[0064] (4) The electrode 400 of the detection end 110 of the branch tube 100 receives and can transmit and express the electrocardiogram signal in the heart chamber. By observing the electrocardiogram, the doctor can determine the location of the lesion and provide assistance for subsequent ablation surgery.

[0065] (5) Perform ablation surgery.

[0066] (6) After ablation, perform intracardiac mapping in step (3) again. If the lesion is completely eliminated, remove the catheter; if the lesion is not completely eliminated, continue the ablation procedure until the lesion is completely eliminated.

[0067] The electrophysiological mapping catheter device 10 of the present invention can adapt to irregular cardiac chambers in three-dimensional space and can record electrophysiological signals in numerous folds or loose grooves on the inner surface of the cardiac chamber. It can also generate more accurate three-dimensional mapping images in a shorter time, reducing the difficulty for doctors to identify the images and facilitating surgical procedures. The electrophysiological mapping catheter device 10 of the present invention can fully contact irregular cardiac chamber structures, rough inner walls, and confined spaces such as proximal and distal dead angles, thereby accurately recording their electrical signals. The multiple branch tubes 100 of the electrophysiological mapping catheter device 10 provided by the present invention have a divergent three-dimensional spatial structure, and the detection ends 110 are staggered. This staggered distribution of the detection ends 110 can adapt to various irregular cardiac chamber structures, and the electrodes 400 of the detection ends 110 can easily reach various confined spaces and fine structures within the cardiac chamber.

[0068] Compared with the prior art, the electrophysiological mapping catheter device 10 of the present invention has multiple branch tubes 100 that are divergent and adjustable in angle, with a large number of branches and a large number of electrodes 400. This increases the reliability of the contact between the electrodes 400 and irregular cardiac chambers and folds or grooves in the heart wall during surgery, improves the precision and accuracy of intracardiac electrical signal acquisition, shortens the operation time, makes the operation safer and more efficient, and greatly facilitates the surgeon.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An electrophysiological mapping catheter device, characterized in that, The device includes a catheter, an adjusting handle, electrodes, and a connector. The catheter includes an adjusting tube and multiple branch tubes, each branch tube having a connecting end and a detection end at its two ends. The multiple detection ends are staggered and each detection end is equipped with an electrode. The branch tubes are flexible and have shape memory capabilities, allowing them to be retracted by an external force and reset when the force dissipates. The end faces of the detection ends of the multiple branch tubes are distributed on the same curved surface, which can be a sphere, a partial sphere, an ellipsoid, or a partial ellipsoid. The detection ends can be retracted into a sheath and, when pushed out of the sheath, can naturally diverge. The branch tubes are arranged in a predetermined shape, with an axial angle of 110°-180° between the branch tubes and the regulating tube. The branch tubes are divided into at least two groups, and the branch tubes in each group are circumferentially symmetrical about the axis of the regulating tube. Each connecting end is connected to the regulating tube. The angle between the branch tubes and the regulating tube is different in different groups. The regulating tube is connected to the regulating handle device and the bending angle of the regulating tube can be adjusted by the regulating handle device. The connector is disposed on the regulating handle device and electrically connected to the electrode. The connector is also used to connect to the electrophysiological system to transmit the electrical signals detected by the electrode.

2. The electrophysiological mapping catheter device according to claim 1, characterized in that, The regulating tube includes a distal end connected to the branch tube and a proximal end connected to the regulating handle device. The electrophysiological mapping catheter device also includes an regulating cable, one end of which is connected to the distal end and the other end of which is connected to the regulating handle device.

3. The electrophysiological mapping catheter device according to claim 2, characterized in that, The distal end is flexible.

4. The electrophysiological mapping catheter device according to claim 2, characterized in that, The distal end has a first lumen, one end of which opens onto the end face of the distal end and the other end is used to communicate with an infusion tube disposed in the proximal end. The infusion tube extends to the adjusting handle device and communicates with an extension tube connected to the adjusting handle device for connecting an external infusion pump.

5. The electrophysiological mapping catheter device according to claim 2, characterized in that, The distal end also has a second cavity, one end of which is connected to the distal end and the other end of which is connected to the proximal end. One end of the adjusting cable is connected to the distal end and the other end passes through the second cavity and is connected to the adjusting handle device.

6. The electrophysiological mapping catheter device according to claim 2, characterized in that, The distal end also has a third lumen, one end of which is connected to the branch pipe and the other end of which is connected to the proximal end. The electrode wire passes through the third lumen, the proximal end and the adjusting handle device in sequence and is then connected to the connector.

7. The electrophysiological mapping catheter device according to any one of claims 1-6, characterized in that, The electrode is a ring electrode with a width of 0.2 to 2 mm, an outer diameter of 0.3 to 1 mm, and a spacing of 1 to 10 mm. Each ring electrode has an inner surface connected to a mutually insulated wire that is connected to the connector.

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