Electrical catheter devices, catheters, cables

Abstract

To provide an electrical catheter device and the like which can achieve both the insulation property and operability.SOLUTION: An electrical catheter device includes a catheter including a first electrode, a second electrode, a first conductor connected to the first electrode and extending toward a proximal end of a defibrillation catheter, a second conductor connected to the second electrode and extending toward the proximal end, and a connector 23 that integrally accommodates a proximal end portion 51 of the first conductor and a proximal end portion 52 of the second conductor; and a voltage applying device that is connected to the connector 23 and applies different voltages to the proximal end portion 51 of the first conductor and the proximal end portion 52 of the second conductor. In the connector 23, a creepage distance longer than a spatial distance is provided between the proximal end portion 51 of the first conductor and the proximal end portion 52 of the second conductor.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to electrical catheter devices and the like. [Background technology]

[0002] Patent Document 1 discloses a defibrillation catheter that applies electrical stimulation to an arrhythmia site in the body. The distal end of the defibrillation catheter is provided with two electrodes (groups) to which a direct current voltage is applied. A positive voltage (positive potential) is applied to one electrode, and a negative voltage (negative potential) is applied to the other electrode. In this specification, an electrode to which a positive voltage is applied at a given time point is conveniently referred to as a positive electrode or a + electrode, and an electrode to which a negative voltage is applied at the given time point is conveniently referred to as a negative electrode or a - electrode. At a time point other than this given time point, a negative voltage may be applied to the positive electrode, and a positive voltage may be applied to the negative electrode. However, at any time point, different voltages are applied to the positive electrode and the negative electrode (or no voltage is applied to either electrode). Similarly, the conductors connected to the positive electrode and the negative electrode and extending to the base end side of the catheter are conveniently referred to as a positive electrode conductor and a negative electrode conductor, respectively. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-115567 Summary of the Invention [Problem to be solved by the invention]

[0004] Since a high voltage of, for example, 600 V can be applied between the positive and negative electrodes, it is important to improve the insulation between the positive and negative conductors to prevent short circuits. In conventional defibrillation catheters, the positive and negative conductors were sometimes completely isolated or separated for insulation. In this case, the connector for connecting the base end of the defibrillation catheter to the cable of the voltage application device has a bifurcated structure divided into a positive conductor and a negative conductor. In accordance with this, the cable of the voltage application device also has a bifurcated structure divided into a positive conductor connection and a negative conductor connection. Such a complex bifurcated structure increases the volume and weight of the connector and cable, which may reduce the operability of the defibrillation catheter. For example, if the cable becomes tangled due to the doctor's operation of the defibrillation catheter, it is assumed that the defibrillation treatment must be interrupted in order to untangle it or to detach the cable from the connector and reconnect it.

[0005] The present disclosure has been made in consideration of these circumstances, and aims to provide an electric catheter device and the like that is capable of achieving both insulation properties and operability. [Means for solving the problem]

[0006] In order to solve the above problems, an electric catheter device according to one embodiment of the present disclosure includes a catheter including a first electrode, a second electrode, a first conductor connected to the first electrode and extending to the base end of the catheter, a second conductor connected to the second electrode and extending to the base end, and a connector that integrally houses the base ends of the first conductor and the second conductor, and a voltage application device connected to the connector that applies different voltages to the base ends of the first conductor and the second conductor, wherein the connector provides a creepage distance between the base end of the first conductor and the base end of the second conductor that is longer than the spatial distance.

[0007] In this embodiment, the connector integrally houses the base ends of the first conductor (e.g., conductive to a positive electrode conductor) and the second conductor (e.g., conductive to a negative electrode conductor), improving the operability of the catheter compared to the bifurcated connector described above. Also, the connector provides a creepage distance between the base ends of the first conductor and the second conductor that is longer than the clearance distance, improving the insulation between the two conductors.

[0008] Another embodiment of the present disclosure is a catheter comprising: a first electrode, a second electrode, a first conductor connected to the first electrode and extending to the proximal end of the catheter, a second conductor connected to the second electrode and extending to the proximal end, and a connector to which a voltage application device is connected that applies different voltages to the proximal ends of the first conductor and the second conductor, the connector integrally housing the proximal ends of the first conductor and the second conductor and providing a creepage distance between them that is longer than the spatial distance.

[0009] Yet another embodiment of the present disclosure is a cable, the base end of which is connected to a voltage application device that applies different voltages between a first electrode and a second electrode provided in a catheter, and the tip of which is connected to a connector that integrally houses the base ends of a first conductor connected to the first electrode and extending to the base end side of the catheter and a second conductor connected to the second electrode and extending to the base end side, and that provides a creepage distance longer than a clearance distance between the base ends of the first conductor and the second conductor.

[0010] Yet another aspect of the present disclosure is a method for manufacturing a catheter, the method comprising: a first electrode, a second electrode, a first conducting wire connected to the first electrode and extending to a base end side, a first terminal connected to the base end, a second conducting wire connected to the second electrode and extending to the base end side, a second terminal connected to the base end, and a connector accommodating the first and second terminals as a unit, the method providing a creepage distance between a tip end of the first terminal and a tip end of the second terminal longer than a clearance distance, the method including: covering, with a second insulator, the tip end of the second terminal connected to the base end of the second conducting wire; and covering, with the first insulator, the tip end of the first terminal connected to the base end of the first conducting wire.

[0011] Any combination of the above components, or any conversion of these components into a method, device, system, recording medium, computer program, or the like, is also encompassed by the present disclosure. Effect of the Invention

[0012] According to the electric catheter device etc. of the present disclosure, it is possible to achieve both insulation and operability. [Brief description of the drawings]

[0013] [Figure 1] 1 shows the overall configuration of an electrical catheter device. [Diagram 2] 2 is a cross-sectional view of the shaft 10 taken along line AA in FIG. 1. [Diagram 3] FIG. 2 is a perspective view of the handle portion as viewed from the base end side. [Figure 4] 3A and 3B are schematic diagrams illustrating the base end portion of the conductor group inside the connector body. [Diagram 5] 11 shows a modified example of the arrangement of the base end portion of the conductor group as viewed in the axial direction. [Figure 6] 13 shows a modified example of the arrangement of the base ends of the conductor groups as viewed in the radial direction. [Figure 7] FIG. 11 is a cross-sectional view showing a modified example of the connector. [Figure 8] 1 shows a schematic of an insulator formed in two stages. [Figure 9]1 shows a schematic of an insulator formed in two stages. [Figure 10] 1 shows a schematic of an insulator formed in two stages. [Figure 11] 1 shows a schematic of an insulator formed in two stages. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a form for carrying out the present disclosure (hereinafter also referred to as an embodiment) will be described in detail with reference to the drawings. In the description and / or drawings, the same or equivalent components, members, processes, etc. will be given the same reference numerals, and duplicated explanations will be omitted. The scale and shape of each part shown in the drawings are set for convenience in order to simplify the explanation, and are not to be interpreted as being limiting unless otherwise specified. The embodiment is an example, and does not limit the scope of the present disclosure in any way. All features described in the embodiment and their combinations are not necessarily essential to the present disclosure.

[0015] FIG. 1 shows the overall configuration of an electric catheter device according to an embodiment of the present disclosure. The electric catheter device includes a defibrillation catheter 100 and a voltage application device 200. The defibrillation catheter 100 performs defibrillation by applying electrical stimulation to an arrhythmic site in the body. Typical examples of an arrhythmic site that causes an arrhythmia include atria such as the right atrium and the left atrium, and ventricles such as the right ventricle and the left ventricle (hereinafter, the atrium and the ventricle are collectively referred to as the heart cavity). Note that the catheter that can be used for the electric catheter device according to the present disclosure is not limited to the defibrillation catheter 100, which is described in detail below and targets the interior of the heart cavity. Specifically, any catheter can be used as long as it can perform electrical treatment based on a DC or AC voltage between multiple electrodes (first and second electrodes described later) provided on the tip side (inside the body) to a target site in the body. For example, a pulse electric field ablation catheter that performs ablation treatment on a target site such as an arrhythmic site by a pulse electric field generated according to the voltage between multiple electrodes may be used for the electric catheter device according to the present disclosure.

[0016] The defibrillation catheter 100 includes a flexible tubular shaft 10 that is inserted into the body, and a handle section 20 that is connected to the base end side (outside the body) of the shaft 10. A doctor or the like who is an operator of the defibrillation catheter 100 operates the defibrillation catheter 100 while gripping the handle section 20. The handle section 20 includes a handle body 21, a knob-shaped operation section 22, a connector 23, and a strain relief 24. The operator of the defibrillation catheter 100 rotates the operation section 22 with his / her fingers while gripping the handle body 21, thereby deflecting (swiveling) the tip end (left end in FIG. 1 ) of the shaft 10 in a predetermined direction through a pull wire described later. In addition, the tip end of the shaft 10 can be positioned in a desired direction by rotating the handle body 21 in a circumferential direction. The connector 23 is connected to the tip end of the voltage application device 200 and / or the cable 2 of the electrocardiograph.

[0017] Three types of electrode groups, a first electrode group 31G, a second electrode group 32G, and a third electrode group 33G, are provided on the distal end of the defibrillation catheter 100 and the shaft 10. The positions and order of the first electrode group 31G, the second electrode group 32G, and the third electrode group 33G in the axial direction of the shaft 10 (the left-right direction in FIG. 1) are arbitrary, but in the illustrated example, the first electrode group 31G, the second electrode group 32G, and the third electrode group 33G are arranged in this order from the distal end to the proximal end. When defibrillation treatment is performed in a cardiac cavity using the defibrillation catheter 100 with such an electrode arrangement, for example, the first electrode group 31G on the distal end side is located in the coronary vein, the second electrode group 32G on the proximal end side is located in the right atrium, and the third electrode group 33G on the proximal end side is located in the superior vena cava.

[0018] The first electrode group 31G includes a plurality of (eight in this embodiment) ring-shaped first electrodes 31 separated in the axial direction. The second electrode group 32G includes a plurality of (eight in this embodiment) ring-shaped second electrodes 32 separated in the axial direction. The third electrode group 33G includes a plurality of (four in this embodiment) ring-shaped third electrodes 33 separated in the axial direction. Each of the electrode groups 31G, 32G, and 33G may be composed of one electrode (in this case, it is not strictly an "electrode group"). In addition, as in the illustrated example, the plurality of electrodes 31, 32, and 33 do not have to be arranged in a group for each electrode group 31G, 32G, and 33G, and may be arranged so as to be scattered at any position in the axial direction in any order. A protective tip 35 is provided at the tip of the defibrillation catheter 100 and the shaft 10.

[0019] Voltages of different polarities are applied to the first electrode 31 and the second electrode 32 by the voltage application device 200 connected to the connector 23. Specifically, while a positive (+) voltage is applied to the first electrode 31, a negative (-) voltage is applied to the second electrode 32, and while a negative voltage is applied to the first electrode 31, a positive voltage is applied to the second electrode 32. Furthermore, while neither a positive nor a negative voltage is applied to the first electrode 31, neither a positive nor a negative voltage is applied to the second electrode 32. In a typical defibrillation treatment, the defibrillation catheter 100 applies electrical stimulation to the arrhythmia site based on a DC voltage (applied by the voltage application device 200 as a DC power supply device) between the first electrode 31 (e.g., a coronary vein) and the second electrode 32 (right atrium).

[0020] Hereinafter, the first electrode 31 will be conveniently referred to as a positive electrode or a + electrode, and the second electrode 32 will be conveniently referred to as a negative electrode or a - electrode. This expression is based only on the fact that a positive voltage is applied to the first electrode 31 at a predetermined time point, and a negative voltage is applied to the second electrode 32 at the same predetermined time point. Therefore, at a time point different from this predetermined time point, a negative voltage may be applied to the first electrode 31 as a positive electrode, and a positive voltage may be applied to the second electrode 32 as a negative electrode. It is also possible to apply an AC voltage between the first electrode 31 and the second electrode 32 by increasing the frequency of polarity reversal of the voltage applied by the voltage application device 200 to the first electrode 31 and the second electrode 32 (in this case, the voltage application device 200 functions as an AC power supply device). As shown in the example, when a first electrode group 31G is formed by a plurality of first electrodes 31 and a second electrode group 32G is formed by a plurality of second electrodes 32, all of the first electrodes 31 are substantially at the same potential (e.g., positive potential), and all of the second electrodes 32 are substantially at the same potential (e.g., negative potential) of opposite polarity to the first electrodes 31.

[0021] The third electrode 33 is provided on the distal end side of the defibrillation catheter 100 and the shaft 10 (however, in this embodiment, it is closer to the proximal end than the first electrode 31 and the second electrode 32) to measure a potential (e.g., cardiac potential) inside the body (e.g., the superior vena cava where abnormal potential is likely to occur). The third electrode 33 is connected via the connector 23 to a voltage application device 200 having a function of an electrocardiograph or the like, or to a standalone electrocardiograph or the like.

[0022] Fig. 2 is an AA cross-sectional view of the shaft 10 in Fig. 1. This AA cross-section is a cross-section of the shaft 10 at an arbitrary position on the proximal side of any of the electrode groups 31G, 32G, and 33G. Four lumens (inner cavities), namely, a first lumen 11, a second lumen 12, a third lumen 13, and a fourth lumen 14, are formed inside the tubular shaft 10. Each of the lumens 11 to 14 is partitioned by a tubular inner tube 15 made of fluororesin or the like.

[0023] A first conductor group 41G is inserted inside the first lumen 11. The first conductor group 41G is electrically connected to the first electrode group 31G at the tip side of the defibrillation catheter 100 and extends to the connector 23 at the base end side of the defibrillation catheter 100. The first conductor group 41G includes first conductors 41, the number of which is the same as the number of first electrodes 31 in the first electrode group 31G (eight in this embodiment). The tip end of each first conductor 41 is connected to each first electrode 31 in a one-to-one relationship. The base end of each first conductor 41 is connected to the tip end of each first terminal 41' in the terminal section 40, which will be described later, to form each first conductor 41". The base end of each first conductor 41" (i.e., the base end of each first terminal 41') is connected to the tip of the cable 2 of the voltage application device 200 at the connector 23. In this way, the first conductor group 41G and the first terminal group 41G' mutually connect the first electrode group 31G on the tip side of the defibrillation catheter 100 and the voltage application device 200 on the base end side of the defibrillation catheter 100. The voltage application device 200 can apply a positive voltage (or negative voltage) to the first electrode group 31G as a positive electrode group through the cable 2 to which the base end is connected, the first terminal group 41G', and the first conductor group 41G.

[0024] The base end side of each first conducting wire 41 may extend uninterrupted into the connector 23, but more realistically, it is electrically connected to a terminal portion 40 (a structure visible inside the connector 23 (connector body 231) in FIG. 3, see also FIGS. 4 to 6) housed in the connector 23 at the tip side (not shown) of the connector 23. In this case, it is not the base end of the first conducting wire 41 that is housed in the connector 23, but the base end of the first terminal 41' of the terminal portion 40 electrically connected thereto. In this way, the first conductor group 41G" electrically connecting the first electrode group 31G and the connector 23 is composed of the first conducting wire group 41G and the first terminal group 41G' in the terminal portion 40, which are conductive to each other.

[0025] A second conductor group 42G is inserted inside the second lumen 12. The second conductor group 42G is electrically connected to the second electrode group 32G at the tip side of the defibrillation catheter 100 and extends to the connector 23 at the base end side of the defibrillation catheter 100. The second conductor group 42G includes second conductors 42, the number of which is the same as the number of second electrodes 32 in the second electrode group 32G (eight in this embodiment). The tip end of each second conductor 42 is connected to each second electrode 32 in a one-to-one relationship. The base end of each second conductor 42 is connected to the tip end of each second terminal 42' in the terminal section 40, which will be described later, to form each second conductor 42". The base end of each second conductor 42" (i.e., the base end of each second terminal 42') is connected to the tip of the cable 2 of the voltage application device 200 at the connector 23. In this way, the second conductor group 42G and the second terminal group 42G' mutually connect the second electrode group 32G on the tip side of the defibrillation catheter 100 and the voltage application device 200 on the base end side of the defibrillation catheter 100. The voltage application device 200 can apply a negative voltage (or positive voltage) to the second electrode group 32G as a negative electrode group through the cable 2, the second terminal group 42G', and the second conductor group 42G.

[0026] The base end side of each second conducting wire 42 may extend uninterrupted into the connector 23, but more realistically, it is electrically connected to the terminal portion 40 housed in the connector 23 at the tip side (not shown) of the connector 23. In this case, it is not the base end of the second conducting wire 42 that is housed in the connector 23, but the base end of the second terminal 42' of the terminal portion 40 electrically connected thereto. In this way, the second conductor group 42G" electrically connecting the second electrode group 32G and the connector 23 is composed of the second conducting wire group 42G and the second terminal group 42G' in the terminal portion 40, which are conductive with each other.

[0027] A third conductor group 43G is inserted inside the third lumen 13. The third conductor group 43G is electrically connected to the third electrode group 33G at the tip side of the defibrillation catheter 100 and extends to the connector 23 at the base end side of the defibrillation catheter 100. The third conductor group 43G includes third conductors 43, the number of which is the same as the number of third electrodes 33 in the third electrode group 33G (four in this embodiment). The tip end of each third conductor 43 is connected to each third electrode 33 in a one-to-one relationship. The base end of each third conductor 43 is connected to the tip end of each third terminal 43' in the terminal unit 40, which will be described later, to form each third conductor 43". The base end of each third conductor 43" (i.e., the base end of each third terminal 43') is connected to the tip of a voltage application device 200 having the function of an electrocardiograph in the connector 23 or a cable 2 of a standalone electrocardiograph. In this way, the third conductor group 43G and the third terminal group 43G' mutually connect the third electrode group 33G on the tip side of the defibrillation catheter 100 to the voltage application device 200 and / or the electrocardiograph on the base end side of the defibrillation catheter 100. The voltage application device 200 and / or the electrocardiograph can acquire the cardiac potential and the like measured by the third electrode group 33G serving as a measurement electrode group through the cable 2, the third terminal group 43G' and the third conductor group 43G.

[0028] The base end side of each third conducting wire 43 may extend uninterrupted into the connector 23, but more realistically, it is electrically connected to the terminal portion 40 housed in the connector 23 at the tip side (not shown) of the connector 23. In this case, it is not the base end of the third conducting wire 43 that is housed in the connector 23, but the base end of the third terminal 43' of the terminal portion 40 electrically connected thereto. In this way, the third conductor group 43G" electrically connecting the third electrode group 33G and the connector 23 is composed of the third conducting wire group 43G and the third terminal group 43G' in the terminal portion 40, which are conductive with each other.

[0029] A single pull wire 71 is inserted through the fourth lumen 14. The distal end of the pull wire 71 is fixed to the tip 35, and the proximal end of the pull wire 71 is fixed to the operation unit 22 of the handle unit 20. Since the fourth lumen 14 is offset (eccentric) from the central axis of the shaft 10, the distal end of the shaft 10 can be deflected (swung) by operating the pull wire 71 with the operation unit 22. Specifically, when the operator of the defibrillation catheter 100 rotates the operation unit 22 in one direction, the pull wire 71 is pulled toward the proximal end (near the front in FIG. 2), and the distal end of the shaft 10 on which the tip 35 is provided is deflected in one direction (approximately leftward in FIG. 2). Similarly, when the operator of the defibrillation catheter 100 rotates the operation unit 22 in the other direction, the pull wire 71 is pushed toward the distal end (farther back in FIG. 2), and the distal end of the shaft 10 on which the tip 35 is provided is deflected in the other direction (approximately rightward in FIG. 2).

[0030] 3 is a perspective view of the handle section 20 as viewed from the base end side. The connector 23 constituting the base end of the handle section 20 includes a substantially cylindrical connector body 231. The connector body 231 integrally houses the base end 51 of the first terminal group 41G', the base end 52 of the second terminal group 42G', and the base end 53 of the third terminal group 43G'. The tip of the voltage application device 200 and / or the cable 2 of the electrocardiograph can be inserted from the base end side into the internal space of the connector body 231 and attached to the terminal section 40. The cable 2 includes three types of terminal groups corresponding to the first terminal group 41G', the second terminal group 42G', and the third terminal group 43G' of the defibrillation catheter 100, and the respective tip portions are connected to the base ends 51, 52, and 53 of the corresponding terminal groups 41G', 42G', and 43G'. As a result, the voltage application device 200 can apply different voltages to the first electrode group 31G and the second electrode group 32G through the base end 51 of the first terminal group 41G' and the base end 52 of the second terminal group 42G'. Furthermore, the voltage application device 200 having the function of an electrocardiograph can acquire the cardiac potential measured by the third electrode group 33G through the base end 53 of the third terminal group 43G'.

[0031] 4 shows a schematic diagram of the base ends 51, 52, 53 of the terminal groups 41G', 42G', 43G' of the terminal section 40 inside the connector body 231. The upper side in this figure is the tip side where the defibrillation catheter 100 is present, and the lower side in this figure is the base side where the voltage application device 200 is present. The base ends 51, 52, 53 of the terminal groups 41G', 42G', 43G' are shown on the tip side, and the cable 2 of the voltage application device 200 having three types of terminal groups corresponding to the terminal groups 41G', 42G', 43G' is shown on the base side. The tip end (upper end in FIG. 4) of the cable 2 is formed in an uneven shape that matches the uneven shape formed by the base ends 51, 52, 53, which will be described later. 4, the tip of cable 2 inserted toward the tip side is firmly attached or fixed by fitting into the uneven shape of base ends 51, 52, and 53. When cable 2 is connected to connector 23, there is a possibility that base ends 51, 52, and 53 may be slightly exposed.

[0032] Between the base end 51 of the first terminal group 41G' as a positive terminal group to which a positive voltage (or negative voltage) is applied by the voltage application device 200, and the base end 52 of the second terminal group 42G' as a negative terminal group to which a negative voltage (or positive voltage) is applied by the voltage application device 200, a creepage distance longer than the spatial distance is provided to insulate the two. The creepage distance is the distance between conductors along the surface of an insulator. In the example of FIG. 4, the distance Da between the first end face on which the base end 51 of the first terminal group 41G' is provided and the second end face on which the base end 52 of the second terminal group 42G' is provided in the normal direction (up and down direction in FIG. 4) of at least one of the first end face and the second end face is the creepage distance between the two base ends 51, 52. The creepage distance is not limited to an orthogonal plane perpendicular to the first end face and / or the second end face as shown in the figure, but may be provided in an intersecting plane intersecting the first end face and / or the second end face. Additionally, the creepage distance may be configured across different adjacent insulator surfaces.

[0033] Strictly speaking, as shown by the thick solid line on the left side in Fig. 4, the creepage distance between both base ends 51, 52 is the distance along the surface of the insulator between the first terminal 41' (the rightmost first terminal 41' in the illustrated example) and the second terminal 42' (the leftmost second terminal 42' in the illustrated example) that are closest to each other among the multiple first terminals 41' (electrically connected to the multiple first conducting wires 41) constituting the first terminal group 41G' and the multiple second terminals 42' (electrically connected to the multiple second conducting wires 42) constituting the second terminal group 42G'. Therefore, the creepage distance between both base ends 51, 52 includes a small component in a direction perpendicular to the normal direction (the left-right direction in Fig. 4) in addition to the normal direction component Da. In contrast, as shown by the thick dotted line on the right side of Fig. 4, the spatial distance between both base ends 51, 52 is the distance between the positions of the first terminal 41' and the second terminal 42' that are closest to each other and slightly exposed from the connector 23 (insulator) and the connected cable 2, respectively, drawn in a straight line. Therefore, the creepage distance between two equivalent points drawn in a broken line along the surface of the insulator is longer than the spatial distance drawn in a straight line. In the following, the creepage distance between both base ends 51, 52 will be described as the distance Da in the normal direction, unless otherwise specified.

[0034] As described above, the first end face (base end 51) and the second end face (base end 52), both of which have the axial direction (the up-down direction in FIG. 4) as their normal direction, are arranged on different planes so as to form a step and / or unevenness of height Da. In the illustrated example, the second end face protrudes from the first end face toward the base end by the creeping distance Da, but the first end face may also protrude from the second end face toward the base end by the creeping distance Da.

[0035] A high voltage of, for example, 600 V is applied between the base end 51 of the first terminal group 41G' and the base end 52 of the second terminal group 42G' by the voltage application device 200, but since the base ends 51 and 52 are insulated by the creeping distance Da, short circuiting is effectively prevented. In addition, a spatial distance (thick dotted line) according to the creeping distance Da is also formed between the base ends 51 and 52, so that dielectric breakdown is also effectively prevented. Since such a creeping distance Da can be formed by a step and / or unevenness in one connector 23, it is not necessary to separate the positive terminal (first terminal 41') and the negative terminal (second terminal 42') into two for insulation, as in the case of a conventional defibrillation catheter. Thus, according to this embodiment, the base ends 51 and 52 of the first terminal group 41G' and the second terminal group 42G', which are insulated by the creeping distance Da, can be stored integrally and compactly in a single connector 23 and connector body 231.

[0036] As a result, the connector 23 and the cable 2, which may have a bifurcated structure in the conventional defibrillation catheter, are of a simple single structure, and the operability of the defibrillation catheter 100 according to the present embodiment is improved. In particular, in recent years, defibrillation catheters are often inserted from the legs, which are relatively far from the heart, and operators such as doctors are required to operate carefully along a complex and long path to the heart. According to the defibrillation catheter 100 according to the present embodiment, the connector 23 and the cable 2 are of a single structure, which makes them easy to handle and reduces the possibility of the connector 23 and the cable 2 becoming entangled during operation, thereby preventing the defibrillation procedure from being interrupted or the operator's attention from being distracted in order to deal with the entanglement. In addition, in the conventional bifurcated connector, there was a possibility that cleaning fluid or the like would enter the inside of the defibrillation catheter during cleaning, but the connector 23 and the cable 2 are of a single structure without a branch, which prevents the intrusion of liquid or the like.

[0037] As shown in FIG. 3, the base end 51 (first end face) of the first terminal group 41G', the base end 52 (second end face) of the second terminal group 42G', and the base end 53 (third end face) of the third terminal group 43G' are arranged in a substantially concentric shape with the base end 53 as the center when viewed in the axial direction of the defibrillation catheter 100. The first end face of the base end 51 located at the outermost position in the radial direction and the second end face of the base end 52 located inside it are each formed in a substantially annular shape when viewed in the axial direction. The inner circumference of the first end face and the outer circumference of the second end face are substantially coincident. In this way, the first end face of a substantially annular shape with a large diameter surrounds the second end face of a substantially annular shape with a small diameter when viewed in the axial direction (when viewed in the normal direction of each end face in FIG. 4). Moreover, the third end face of the base end 53 located at the innermost position in the radial direction is formed in a substantially circular shape when viewed in the axial direction. The inner circumference of the second end face and the outer circumference of the third end face are substantially coincident. In this way, the substantially annular second end face surrounds the substantially circular third end face when viewed in the axial direction (when viewed in the normal direction of each end face in FIG. 4).

[0038] 3 and 4, a creepage distance longer than the spatial distance may be provided between a base end 52 of the second terminal group 42G' to which a positive voltage (or negative voltage) is applied by the voltage application device 200 and a base end 53 of the third terminal group 43G' as a measurement terminal group from which a cardiac potential is acquired by the voltage application device 200, which insulates the two. However, since the voltage between the second terminal group 42G' and the third terminal group 43G' is smaller than the high voltage (for example, up to 600V) between the first terminal group 41G' and the second terminal group 42G', the creepage distance between the base end 52 and the base end 53 may be smaller than the creepage distance Da between the base end 51 and the base end 52. In addition, the creepage distance between base end 52 and base end 53 may be substantially zero, in which case base end 52 and base end 53 are arranged on the same plane (strictly speaking, a small creepage distance and spatial distance are formed between second terminal 42' and third terminal 43', which are closest to each other).

[0039] The third terminal group 43G' produces a voltage (cardiac potential) whose absolute value is generally smaller than that of the first terminal group 41G' as a positive terminal group and the second terminal group 42G' as a negative terminal group. For this reason, the third terminal group 43G' has fewer restrictions on arrangement inside the connector 23 and the connector body 231 than the first terminal group 41G' and the second terminal group 42G', which require careful consideration to ensure insulation. Therefore, in the example of FIG. 3, the base end portion 53 (third end surface) of the third terminal group 43G' can be efficiently arranged in the empty space inside the base end portion 51 (first end surface) of the first terminal group 41G' and the base end portion 52 (second end surface) of the second terminal group 42G', both of which are substantially annular, to thereby form the connector 23 compactly.

[0040] FIG. 5 shows a modified example of the arrangement of the base ends 51, 52, and 53 as viewed in the axial direction. The base end 53 of the third terminal group 43G' is arranged approximately in the center of the connector body 231, and the base end 51 of the first terminal group 41G' and the base end 52 of the second terminal group 42G' are arranged so as to sandwich it from both sides. In the illustrated example, the substantially circular third end face (base end 53) is sandwiched between the substantially semicircular first end face (base end 51) and the second end face (base end 52), respectively, to form a connection area of ​​the cable 2 that is substantially circular as a whole. A creeping distance Da in a direction perpendicular to the paper surface in FIG. 5 is provided at the boundary between the base end 51 of the first terminal group 41G' and the base end 52 of the second terminal group 42G'. Therefore, one of the base ends 51 and 52 is located in front of (or behind) the other of the base ends 51 and 52 on the paper surface in FIG. 5. Furthermore, base end 53 may be disposed on the same plane as base ends 51 and / or 52, or may be disposed on a different plane than base ends 51 and / or 52.

[0041] 6 shows a modified example of the arrangement of the base ends 51, 52, and 53 as viewed in the radial direction. In this modified example, a creepage distance is provided between the base end 51 of the first terminal group 41G' as a positive terminal group to which a positive voltage (or negative voltage) is applied by the voltage application device 200 and the base end 52 of the second terminal group 42G' as a negative terminal group to which a negative voltage (or positive voltage) is applied by the voltage application device 200 in a direction intersecting the normal direction of at least one of the first end face (base end 51) and the second end face (base end 52). Specifically, in the example of FIG. 6, the first end face of the base end 51 and the second end face of the base end 52 are arranged on the same plane, but a creepage distance Db that insulates them in a direction perpendicular to the normal direction (left and right direction in FIG. 6) and a creepage distance Da similar to FIG. 4 that insulates them in the normal direction are provided.

[0042] As shown by the thick solid line in FIG. 6, the creepage distance between the base ends 51 and 52 is the distance along the surface of the insulator between the first terminal 41' (the rightmost first terminal 41' in the illustrated example) and the second terminal 42' (the leftmost second terminal 42' in the illustrated example) that are closest to each other among the multiple first terminals 41' constituting the first terminal group 41G' and the multiple second terminals 42' constituting the second terminal group 42G'. Specifically, the creepage distance between the base ends 51 and 52 is the sum of twice the creepage distance Da in the normal direction (for a round trip) and the creepage distance Db in the direction perpendicular thereto. In contrast, as shown by the thick dotted line in FIG. 6, the spatial distance between the base ends 51 and 52 is the distance Db obtained by connecting the first terminal 41' and the second terminal 42' that are closest to each other with a straight line. Therefore, the creepage distance (2Da+Db) between the base ends 51 and 52 is longer than the spatial distance (Db).

[0043] In the region of the creepage distance Db in the left-right direction, the third terminal group 43G' and the third end face (base end 53) may be provided as in the illustrated example, or nothing may be provided other than the insulator. In addition, the region of the creepage distance Db may protrude by the creepage distance Da toward the base end side (lower side in FIG. 6) from the first end face (base end 51) and the second end face (base end 52) as in the illustrated example, or may be recessed toward the tip end side (upper side in FIG. 6) from the first end face and the second end face. In this way, the creepage distance between the first end face (base end 51) and the second end face (base end 52) may include both axial (Da) and radial (Db) components.

[0044] 7 is a cross-sectional view showing a modified example of the connector 23. The left-right direction in this figure is the axial direction of the shaft 10, with the left side being the tip side and the right side being the base end side. As described above, a space into which the cable 2 can be inserted is formed on the base end side of the connector body 231 in the connector 23.

[0045] In the examples of FIGS. 3 and 4, the third conductor group 43G and the third terminal group 43G' (i.e., the third conductor group 43G") for acquiring the cardiac potential and the like measured by the third electrode group 33G are provided separately from the first conductor group 41G and the first terminal group 41G' (i.e., the first conductor group 41G") and the second conductor group 42G and the second terminal group 42G' (i.e., the second conductor group 42G"), but in the example of FIG. 7, Each third conductor 43" is incorporated into the first conductor group 41G" and / or the second conductor group 42G". For this reason, in Figure 7, the first conductor group 41G" (first conductor group 41G and first terminal group 41G') and the second conductor group 42G" (second conductor group 42G and second terminal group 42G') are conveniently shown as also representing each third conductor 43" (each third conductor 43 and each third terminal 43') that may be included therein.

[0046] As in the example of Fig. 4, a creepage distance longer than a spatial distance is provided between the base end 51 of the first terminal group 41G' as a positive terminal group to which a positive voltage (or negative voltage) is applied by the voltage application device 200 and the base end 52 of the second terminal group 42G' as a negative terminal group to which a negative voltage (or positive voltage) is applied by the voltage application device 200, which insulates the two. Note that in the example of Fig. 4, the base end 51 of the first terminal group 41G' on the outer periphery side is recessed toward the tip end, and the base end 52 of the second terminal group 42G' on the inner periphery side protrudes toward the base end, whereas in the example of Fig. 7, there is a slight difference in that the base end 51 of the first terminal group 41G' on the outer periphery side protrudes toward the base end, and the base end 52 of the second terminal group 42G' on the inner periphery side is recessed toward the tip end. However, there is no difference between Figures 4 and 7 in that a creepage distance longer than the spatial distance is provided between base end 51 and base end 52, and therefore the example in Figure 7 also achieves the same action and / or effect specific to this embodiment as the example in Figure 4.

[0047] 7, a creepage distance longer than the spatial distance is provided between the tip 61 of the first terminal group 41G' and the tip 62 of the second terminal group 42G', which insulates them from each other. Specifically, the tip 61 of the first terminal group 41G' on the outer periphery side is recessed toward the base end, and the tip 62 of the second terminal group 42G' on the inner periphery side protrudes toward the tip end. Even if the tip 61 of the first terminal group 41G' on the outer periphery side protrudes toward the tip end and the tip 62 of the second terminal group 42G' on the inner periphery side is recessed toward the base end, a creepage distance that achieves the same action and / or effect is provided.

[0048] 7, a creepage distance longer than the spatial distance that insulates the first terminal group 41G' and the second terminal group 42G' is provided on both the base end side (base ends 51, 52) and the tip end side (tips 61, 62), so that the high insulation effectively prevents short circuits even when a high voltage of, for example, 600 V is applied by the voltage application device 200. In addition, a spatial distance according to the creepage distance is also formed on both the base end side (base ends 51, 52) and the tip end side (tips 61, 62) of the first terminal group 41G' and the second terminal group 42G', so that dielectric breakdown is also effectively prevented.

[0049] In the connector 23 that forms the base end of the entire shaft 10 or defibrillation catheter 100 shown in FIG. 7, the base end of the first conductor group 41G, which has the first electrode group 31G connected to its tip end and extends to the base end side, is connected to the tip end of the first terminal group 41G' that is integral with the connector 23 (connector body 231), and the base end of the second conductor group 42G, which has the second electrode group 32G connected to its tip end and extends to the base end side, is connected to the tip end of the second terminal group 42G' that is integral with the connector 23 (connector body 231).

[0050] Here, the first conductive wires 41 and the second conductive wires 42 extending from the connector 23 to the tip side are each covered with a thin insulating film such as polyamideimide (PAI), and are therefore insulated from each other. However, in this embodiment, a high voltage of, for example, 600 V may be applied between the first conductive wire group 41G and the second conductive wire group 42G, so it is preferable to further increase the insulation between them. For this purpose, an insulator 8 made of any insulating material such as polyamide is provided on the tip side of the connector 23 (the left side in FIG. 7).

[0051] The insulator 8 covers the base end of the first conductor group 41G and the base end of the second conductor group 42G so that they are insulated or isolated from each other. The insulator 8 preferably covers not only the base end of the first conductor group 41G and the base end of the second conductor group 42G, but also the tip end of the first terminal group 41G' to which the base end of the first conductor group 41G is connected and the tip end of the second terminal group 42G' to which the base end of the second conductor group 42G is connected. For example, the insulator 8 molds the base end of the first conductor group 41G, the tip end 61 of the first terminal group 41G', the base end of the second conductor group 42G, and the tip end 62 of the second terminal group 42G' substantially integrally.

[0052] In such a molded insulator 8, the first conductor group 41G and the second conductor group 42G are isolated so as not to contact each other. For example, as described below, by forming the insulator 8 in two stages, a first insulator 81 that substantially molds only the first conductor group 41G, and a second insulator 82 that substantially molds only the second conductor group 42G, the first conductor group 41G and the second conductor group 42G can be effectively isolated within the insulator 8. However, as long as the first conductor group 41G and the second conductor group 42G are actually isolated within the insulator 8, the method of forming the insulator 8 is arbitrary.

[0053] 8 to 11 are schematic diagrams showing the insulator 8 formed in two stages. FIG. 8 shows the tip portion 61 of the first terminal group 41G' and the tip portion 62 of the second terminal group 42G' before molding of the insulator 8. As shown in this figure and other figures, the tip portion 61 of the first terminal group 41G' on the outer periphery side is provided on the base end side (lower side in FIG. 8) than the tip portion 62 of the second terminal group 42G' on the inner periphery side. In other words, the tip portion 62 of the second terminal group 42G' on the inner periphery side protrudes toward the tip side (upper side in FIG. 8) from the tip portion 61 of the first terminal group 41G' on the outer periphery side. Moreover, the tip portion 61 of the first terminal group 41G' on the outer periphery side surrounds the tip portion 62 of the second terminal group 42G' on the inner periphery side when viewed in the axial direction (when viewed vertically in FIG. 8).

[0054] In the state of FIG. 8, the second conductor group 42G is connected only to the second terminal group 42G' on the inner circumference side, and the first conductor group 41G is not yet connected to the first terminal group 41G' on the outer circumference side. In the following FIG. 9, the tip end 62 of the second terminal group 42G' to which the base end of the second conductor group 42G is connected is covered or molded by the second insulator 82 together with the second conductor group 42G. In this manner, the second insulator 82 substantially molds only the second conductor group 42G and the second terminal group 42G' on the inner circumference side. The second conductor group 42G coming out from the tip end (the upper end in FIG. 9) of the second insulator 82 to the tip side is bundled by an insulating tube such as polyimide, and is insulated or isolated from other members such as the first conductor group 41G.

[0055] In FIG. 10, which follows FIG. 9, the first conductor group 41G is connected to the first terminal group 41G' on the outer periphery. The second conductor group 42G connected to the second terminal group 42G' on the inner periphery is molded by the second insulator 82, and is therefore effectively insulated or isolated from the newly connected first conductor group 41G without contacting it. In FIG. 11, the tip end 61 of the first terminal group 41G' to which the base end of the first conductor group 41G is connected is covered or molded by the first insulator 81 together with the first conductor group 41G and the second insulator 82. In this way, the first insulator 81 molds substantially only the first conductor group 41G and the first terminal group 41G' on the outer periphery. The first group of conductors 41G extending from the tip (upper end in FIG. 11) of the first insulator 81 (or the entire insulator 8) toward the tip side is bundled by an insulating tube such as polyimide, and is insulated or isolated from other components such as the second group of conductors 42G (bundled by another insulating tube).

[0056] As shown in Fig. 8, the tip 62 of the second terminal group 42G' on the inner circumference side protrudes further toward the tip side than the tip 61 of the first terminal group 41G' on the outer circumference side, so that the second insulator 82 (Fig. 9) that essentially molds only the inner circumference side can be easily formed. Furthermore, the first insulator 81 (Fig. 11) on the outer circumference side that molds together with the second insulator 82 on the inner circumference side can also be easily formed. Note that since the first insulator 81 and the second insulator 82 are formed in separate steps, the boundary between the first insulator 81 and the second insulator 82 can be detected using any measurement technique, such as an optical measurement technique, as long as the boundary does not disappear due to heat or the like during formation.

[0057] Also, as in Figure 5, when the tip portion 61 (corresponding to 51 in Figure 5) of the first terminal group 41G' and the tip portion 62 (corresponding to 52 in Figure 5) of the second terminal group 42G' are arranged side by side when viewed in the axial direction, the desired insulation may be achieved by forming a first insulator 81 that molds the tip portion 61 and a second insulator 82 that molds the tip portion 62 separately (but may be formed simultaneously).

[0058] The present disclosure has been described above based on the embodiments. Various modifications are possible to the combinations of the components and processes in the exemplary embodiments, and it will be obvious to those skilled in the art that such modifications are included within the scope of the present disclosure.

[0059] The configuration, action, and function of each device and method described in the embodiments can be realized by hardware resources or software resources, or by the cooperation of hardware resources and software resources. For example, a processor, ROM, RAM, and various integrated circuits can be used as hardware resources. For example, programs such as an operating system and applications can be used as software resources. [Explanation of symbols]

[0060] 2 cable, 8 insulator, 10 shaft, 20 handle portion, 23 connector, 31 first electrode, 31G first electrode group, 32 second electrode, 32G second electrode group, 33 third electrode, 33G third electrode group, 40 terminal portion, 41 first conducting wire, 41G first conducting wire group, 42 second conducting wire, 42G second conducting wire group, 43 third conducting wire, 43G third conducting wire group, 81 first insulator, 82 second insulator, 100 defibrillation catheter, 200 voltage application device.

Claims

1. a catheter including a first electrode, a second electrode, a first conductor connected to the first electrode and extending to a base end side of the catheter, a second conductor connected to the second electrode and extending to the base end side, and a connector that integrally houses the base end portions of the first conductor and the second conductor; a voltage application device connected to the connector and configured to apply voltages of different polarities to the base ends of the first conductor and the second conductor; Equipped with In the connector, a creepage distance longer than a clearance distance is provided between a base end of the first conductor and a base end of the second conductor, The creepage distance is provided at an intersecting plane that intersects with a first end face on which a base end of the first conductor is provided, the intersecting surface intersects with a second end surface on which a base end of the second conductor is provided, When viewed in a normal direction of at least one of the first end face and the second end face, the first end face surrounds the second end face, the connector integrally houses a base end of a third conductor, the third conductor being connected to a third electrode provided in the catheter and extending to the base end side, together with the base ends of the first conductor and the second conductor; In the connector, a second creepage distance longer than a clearance distance is provided between a base end of the third conductor and a base end of the second conductor; the second end surface surrounds a third end surface on which a base end portion of the third conductor is provided, when viewed in the normal direction; The second end surface is protruding or recessed from the first end surface and the third end surface. Electrical catheter device.

2. a catheter including a first electrode, a second electrode, a first conductor connected to the first electrode and extending to a base end side of the catheter, a second conductor connected to the second electrode and extending to the base end side, and a connector that integrally houses the base end portions of the first conductor and the second conductor; a voltage application device connected to the connector and configured to apply voltages of different polarities to base end sides of base end portions of the first conductor and the second conductor; Equipped with In the connector, a creepage distance longer than a clearance distance is provided between a base end of the first conductor and a tip side of a base end of the second conductor, The creepage distance is provided at an intersection plane that intersects with a first end face on which a tip side of a base end portion of the first conductor is provided, the intersecting surface intersects with a second end surface on which a tip side of a base end portion of the second conductor is provided, When viewed in a normal direction of at least one of the first end face and the second end face, the first end face surrounds the second end face, an insulator that covers a base end portion of the first conductor and a tip end portion of the base end portion of the second conductor so as to be insulated from each other; the insulator comprises a second insulator covering a tip side of a base end of the second conductor, and a first insulator covering a tip side of a base end of the first conductor together with the second insulator, and a boundary between the first insulator and the second insulator is detectable; the first conductor includes a first conducting wire connected to the first electrode and extending to the base end portion, and a first terminal to which the first conducting wire is connected at the base end portion, the second conductor includes a second conducting wire connected to the second electrode and extending to the base end portion, and a second terminal to which the second conducting wire is connected at the base end portion, the connector integrally houses the first terminal and the second terminal, the voltage application device applies the voltage to the base end portions of the first terminal and the second terminal, The creepage distance is provided between a tip end of the first terminal and a tip end of the second terminal; an electrical catheter device, wherein the second insulator covers a distal end portion of the second terminal to which the proximal end portion of the second conductor is connected, and the first insulator covers, together with the second insulator, a distal end portion of the first terminal to which the proximal end portion of the first conductor is connected.

3. the first conductor includes a first conducting wire connected to the first electrode and extending to the base end portion, and a first terminal to which the first conducting wire is connected at the base end portion, the second conductor includes a second conducting wire connected to the second electrode and extending to the base end portion, and a second terminal to which the second conducting wire is connected at the base end portion, the connector integrally houses the first terminal and the second terminal, the voltage application device applies the voltage to the base end portions of the first terminal and the second terminal, the creepage distance is provided between the first terminal and the second terminal; 2. The electrical catheter device of claim 1.

4. The electrical catheter device according to claim 2 , wherein the first terminal is provided on an outer circumferential side of the second terminal when viewed in an axial direction along which at least one of the first conducting wire and the second conducting wire extends.

5. 5. The electrical catheter device of claim 4, wherein the distal end of the first terminal is disposed proximally relative to the distal end of the second terminal.

6. A first electrode; A second electrode; a first conductor connected to the first electrode and extending to a proximal end side of the catheter; a second conductor connected to the second electrode and extending to the base end; a connector to which a voltage application device is connected that applies voltages of different polarities to the base ends of the first conductor and the second conductor, the connector integrally housing the base ends of the first conductor and the second conductor, and providing a creepage distance between the base ends of the first conductor and the second conductor that is longer than a clearance distance; Equipped with The creepage distance is provided at an intersecting plane that intersects with a first end face on which a base end of the first conductor is provided, the intersecting surface intersects with a second end surface on which a base end of the second conductor is provided, When viewed in a normal direction of at least one of the first end face and the second end face, the first end face surrounds the second end face, the connector integrally houses a base end of a third conductor, the third conductor being connected to a third electrode provided in the catheter and extending to the base end side, together with the base ends of the first conductor and the second conductor; In the connector, a second creepage distance longer than a clearance distance is provided between a base end side of a base end of the third conductor and a base end side of a base end of the second conductor, the second end surface surrounds a third end surface on which a base end portion of the third conductor is provided, when viewed in the normal direction; The second end surface is protruding or recessed from the first end surface and the third end surface. catheter.

7. A cable having a base end connected to a voltage application device that applies voltages of different polarities between a first electrode and a second electrode provided on a catheter, a tip end of the cable is connected to a connector that integrally houses a base end portion of a first conductor to which the first electrode is connected and which extends to the base end side of the catheter and a second conductor to which the second electrode is connected and which extends to the base end side, the connector is provided with a creepage distance between the base end of the first conductor and the base end of the second conductor that is greater than a clearance distance; The creepage distance is provided at an intersecting plane that intersects with a first end face on which a base end of the first conductor is provided, the intersecting surface intersects with a second end surface on which a base end of the second conductor is provided, When viewed in a normal direction of at least one of the first end face and the second end face, the first end face surrounds the second end face, the connector integrally houses a base end of a third conductor, the third conductor being connected to a third electrode provided in the catheter and extending to the base end side, together with the base ends of the first conductor and the second conductor; In the connector, a second creepage distance longer than a clearance distance is provided between a base end of the third conductor and a base end of the second conductor; the second end surface surrounds a third end surface on which a base end portion of the third conductor is provided, when viewed in the normal direction; the second end surface is protruding or recessed from the first end surface and the third end surface, A cable electrically connected to the base end sides of the base ends of the first conductor, the second conductor, and the third conductor in the connector.

8. a catheter including a first electrode, a second electrode, a first conductor connected to the first electrode and extending to a base end side of the catheter, a second conductor connected to the second electrode and extending to the base end side, and a connector that integrally houses the base end portions of the first conductor and the second conductor; a voltage application device connected to the connector and configured to apply voltages of different polarities to the base ends of the first conductor and the second conductor; Equipped with In the connector, a creepage distance longer than a clearance distance is provided between a base end of the first conductor and a base end of the second conductor, The creepage distance is provided at an intersecting plane that intersects with a first end face on which a base end of the first conductor is provided, the intersecting surface intersects with a second end surface on which a base end of the second conductor is provided, When viewed in a normal direction of at least one of the first end face and the second end face, the first end face surrounds the second end face, the connector integrally houses a base end of a third conductor, the third conductor being connected to a third electrode provided in the catheter and extending to the base end side, together with the base ends of the first conductor and the second conductor; In the connector, a second creepage distance longer than a clearance distance is provided between a base end of the third conductor and a base end of the second conductor; the first end surface surrounds a third end surface on which a base end portion of the third conductor is provided, when viewed in the normal direction; the third end surface surrounds the second end surface when viewed in the normal direction, the third end surface is protruding or recessed from the first end surface and the second end surface; Electrical catheter device.

9. a catheter including a first electrode, a second electrode, a first conductor connected to the first electrode and extending to a base end side of the catheter, a second conductor connected to the second electrode and extending to the base end side, and a connector that integrally houses the base end portions of the first conductor and the second conductor; a voltage application device connected to the connector and configured to apply voltages of different polarities to the base ends of the first conductor and the second conductor; Equipped with In the connector, a creepage distance longer than a clearance distance is provided between a base end of the first conductor and a base end of the second conductor, The creepage distance is provided at an intersecting plane that intersects with a first end face on which a base end of the first conductor is provided, the intersecting surface intersects with a second end surface on which a base end of the second conductor is provided, When viewed in a normal direction of at least one of the first end face and the second end face, the first end face surrounds the second end face, the connector integrally houses a base end of a third conductor, the third conductor being connected to a third electrode provided in the catheter and extending to the base end side, together with the base ends of the first conductor and the second conductor; In the connector, a second creepage distance longer than a clearance distance is provided between a base end of the third conductor and a base end of the second conductor; a third end surface on which a base end portion of the third conductor is provided surrounds the first end surface when viewed in the normal direction; The first end surface is protruding or recessed from the second end surface and the third end surface. Electrical catheter device.

Images