Cage-type electric pulse catheter

Abstract

A cage-type electric pulse catheter comprises: a handle; a catheter tube connected to the handle; a catheter rod movably disposed inside the catheter tube to allow the end thereof to be able to enter and exit from the catheter tube; a rod tip coupled to the end of the catheter rod; a leaflet member which is disposed on an outer surface side of the catheter rod and can be selectively unfolded in the outer diameter direction of the catheter rod when the catheter rod moves in the longitudinal direction; and a leaflet electrode disposed on the leaflet member.

Description

Cage-type electric pulse catheter

[0001] The present invention relates to a cage-type electric pulse catheter.

[0002] This study is related to the development of an intelligent cardiovascular intervention assistance robot system based on a 3D heart mapping system and vascular visualization technology (Project ID: 1415173833, Project ID: 10077502, Research Period: 2017.04.01 ~ 2022.06.30) as part of the Robot Industry Technology Development Research Project conducted by Nexton Bioscience Co., Ltd. with support from the Korea Evaluation Institute of Industrial Technology through funding from the Ministry of Trade, Industry and Energy (Government).

[0003] Generally, interventional treatment is a treatment or procedure that uses imaging equipment to guide a catheter to the target lesion area.

[0004] Interventional procedures are characterized by minimal invasiveness, high procedural safety, excellent patient outcomes, minimal pain and scarring, and high patient satisfaction. Their scope of application is expanding. Conventional catheters with ring electrodes and copper wires measure electrocardiograms on the surface of cardiac tissue through the electrodes to diagnose or treat intracardiac arrhythmias, and deliver electrical energy to treat the arrhythmia-inducing site within the cardiac tissue.

[0005] However, when a ring electrode-copper wire is applied to a catheter, the manufacturing difficulty may increase as the number of electrodes increases, and difficulties may arise in quality control of the catheter.

[0006] (Prior art literature)

[0007] (Patent Document) Patent Registration No. 10-2023-0001813 (Published on January 5, 2023)

[0008] Embodiments of the present invention aim to provide a cage-type electric pulse catheter capable of performing effective interventional procedures on the heart.

[0009] According to one embodiment of the present invention, a cage-type electric pulse catheter comprises: a handle; a catheter tube connected to the handle; a catheter rod movably disposed inside the catheter tube so that an end thereof can be inserted into and extracted from the catheter tube; a rod tip coupled to an end of the catheter rod; a leaflet member disposed on an outer surface of the catheter rod and selectively unfoldable in an outer diameter direction of the catheter rod when the catheter rod is moved in a longitudinal direction; and a leaflet electrode disposed on the leaflet member.

[0010] Additionally, the leaflet electrode may include a front electrode disposed on the front side of the leaflet member; and a back electrode disposed on the back side of the leaflet member.

[0011] In addition, the leaflet member includes a support leaflet portion fixedly arranged between the inner diameter surface of the catheter tube and the outer diameter surface of the catheter rod; and an expansion leaflet portion having one end branched into a plurality of portions from an end of the support leaflet portion and the other end converging to the rod tip, wherein the plurality of expansion leaflets can be expanded in parallel with the catheter rod when the end of the catheter rod is withdrawn from the catheter tube, and can be expanded in the outer diameter direction of the catheter rod when the end of the catheter rod is introduced into the catheter tube.

[0012] In addition, the handle includes a rotation guide for rotating the leaflet member in the circumferential direction of the catheter rod, the rotation guide including a guide piece having a guide groove formed on a side wall; and a rotation knob disposed on the guide piece so as to be rotatable along the guide groove and connected to the catheter rod via a moving knob, and the back electrode can be brought into contact with the lesion site so as not to overlap with the front electrode when the leaflet member is rotated by the rotation guide.

[0013] Additionally, it may further include a steering wire for steering the catheter tube in a predetermined direction.

[0014] In addition, the handle may include a main body; a steering knob rotatably disposed on the main body and, when rotated on the main body, steers the catheter tube in a predetermined direction by pushing or pulling the steering wire; and a moving knob movably disposed on the main body in a forward-backward direction and, when moved in the forward-backward direction on the main body, moves the catheter rod in a longitudinal direction so that the leaflet member is selectively unfolded.

[0015] In addition, the present invention may further include a tip electrode provided on the outer diameter surface of the load tip; and a ring electrode provided at the end of the catheter tube.

[0016] In addition, the steering wire has a central portion disposed at an end of the catheter tube, and both ends are connected to the steering knob, and the steering knob has one end of the steering wire connected to an upper portion and the other end of the steering wire connected to a lower portion, so that when the steering knob is rotated in one direction, the one end of the steering wire is pulled in a first direction to steer the catheter tube in the first direction, and when the steering wire is rotated in the other direction, the other end of the steering wire is pulled in a second direction to steer the catheter tube in the second direction.

[0017] Additionally, the handle may further include a fixed knob for selectively fixing the rotational state of the steering knob.

[0018] In addition, the handle may further include a supporter installed on the main body to guide both ends of the steering wire to the upper and lower portions of the steering knob; and a cover arranged to surround a connection portion between the main body and the catheter tube.

[0019] A cage-type electric pulse catheter according to one embodiment of the present invention has the advantage of being able to effectively treat arrhythmia, as it provides an adjustable leaflet member in the shape of a cage at the end of the catheter, thereby exposing the electrode of the leaflet member to the heart as closely as possible, and by configuring a plurality of electrodes, pulse electricity can be applied to a wide area of ​​the heart.

[0020] In addition, the cage-type electric pulse catheter according to one embodiment of the present invention has the advantage of increasing the ease of treatment according to the shape of the tissue within the heart, since the shape of the leaflet member can be adjusted to a cage shape, a straight shape, a flower shape, etc.

[0021] FIG. 1 is a perspective view illustrating a cage-type electric pulse catheter according to one embodiment of the present invention.

[0022] Figure 2 is a side view of the cage-type electric pulse catheter of Figure 1 viewed from the side.

[0023] Figure 3 is a partial perspective view showing the main components of the cage-type electric pulse catheter of Figure 1.

[0024] Figure 4 is an enlarged view of “A” in Figure 3.

[0025] FIG. 5 is an enlarged perspective view of a leaflet member of a cage-type electric pulse catheter according to one embodiment of the present invention.

[0026] Figure 6 is a longitudinal cross-sectional view taken along the line “VI-VI” of Figure 5.

[0027] FIG. 7 is a state diagram showing the state of a leaflet member when a catheter rod according to one embodiment of the present invention is withdrawn from a catheter tube.

[0028] FIG. 8 is a state diagram showing the state of a leaflet member when a catheter rod according to one embodiment of the present invention is rotated by a rotation guide.

[0029] FIG. 9 is a schematic diagram illustrating the layout of a terminal channel according to one embodiment of the present invention.

[0030] Hereinafter, specific embodiments for implementing the idea of ​​the present invention will be described in detail with reference to the drawings.

[0031] In addition, when explaining the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0032] Additionally, when it is said that a component is 'connected', 'supported', 'connected', 'supplied', 'transmitted' or 'in contact with' another component, it should be understood that it may be directly connected, supported, connected, supplied, transmitted or in contact with that other component, but there may also be other components present in between.

[0033] The terminology used herein is intended solely to describe specific embodiments and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

[0034] Additionally, please note that the terms "upper side," "lower side," and "side" in this specification are based on the illustrations in the drawings and may be expressed differently if the orientation of the subject changes. For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically depicted, and the sizes of each component do not fully reflect the actual size.

[0035] Additionally, terms that include ordinal numbers, such as "first," "second," etc., may be used to describe various components, but these components are not limited by such terms. These terms are used solely to distinguish one component from another.

[0036] The term "comprising" as used in the specification means specifying a particular characteristic, region, integer, step, operation, element and / or component, but does not exclude the presence or addition of other particular characteristics, regions, integers, steps, operations, elements, components and / or groups.

[0037] Hereinafter, a specific configuration of a cage-type electric pulse catheter according to one embodiment of the present invention will be described.

[0038] Referring to FIGS. 1 to 9, a cage-type electric pulse catheter (10) according to one embodiment of the present invention can provide electric energy, such as irreversible electroporation or high-frequency electricity, to a lesion site of an organ (e.g., the heart). This cage-type electric pulse catheter (10) can include a handle (100), a catheter tube (200), a catheter rod (300), a rod tip (400), a leaflet member (500), a leaflet electrode (600), and a steering wire (700).

[0039] The handle (100) can manipulate the shape change of the leaflet member (500) and the steering of the catheter tube (200). The handle (100) can electrically control the operation of the leaflet electrode (600), the tip electrode (810), and the ring electrode (820). The handle (100) can include a main body (110), a steering knob (120), a moving knob (130), a supporter (140), a cover (150), and a fixed knob (160).

[0040] The main body (110) can provide the overall appearance of the handle (100). For example, the main body (110) can be provided in the form of a handle that a user can grip. The main body (110) can support the main components of the handle (100), for example, a steering knob (120), a moving knob (130), a supporter (140), a cover (150), a fixed knob (160), and a rotation guide (170). The steering knob (120) and the fixed knob (160) can be rotatably installed on the main body (110), and the moving knob (130) can be arranged to be movable in the forward and backward directions.

[0041] The main body (110) may be provided with components for electrical connection with the leaflet member (500), the tip electrode (810), and the ring electrode (820), for example, a printed circuit board (180) for a connector, a conductor panel (190), and a terminal channel (840). The printed circuit board (180) for a connector may be electrically connected to a high-voltage generator (console). The terminal channel (840) may be electrically connected to the printed circuit board (180) for a connector through a + terminal (841) and a - terminal (842) that are spaced apart from each other, thereby preventing high-voltage discharge. When electrically connecting between the terminal channel (840) and the printed circuit board (180), the connection portion between the terminal channel (840) and the printed circuit board (180) is filled and sealed with an insulating material such as an epoxy or silicone-based polymer, so that it can be used even under high-voltage conditions. The terminal channel (840) can be placed on the conductor panel (190).

[0042] The steering knob (120) can steer the catheter tube (200) via the steering wire (700). For example, the steering knob (120) can steer the catheter tube (200) by pushing or pulling the steering wire (700). The steering knob (120) can be rotatably arranged on the main body (110). One end of the steering wire (700) can be connected to the upper part of the steering knob (120), and the other end of the steering wire (700) can be connected to the lower part of the steering knob (120).

[0043] In this embodiment, when the steering knob (120) is rotated in one direction relative to the main body (110), the steering knob (120) can pull one end of the steering wire (700) in one direction and push the other end of the steering wire (700) in the other direction. When the steering knob (120) is rotated in the other direction relative to the main body (110), the steering knob (120) can push one end of the steering wire (700) in the other direction and pull the other end of the steering wire (700) in one direction. When one end of the steering wire (700) is pulled in one direction, the catheter tube (200) can be steered in one direction, and when the other end of the steering wire (700) is pulled in one direction, the catheter tube (200) can be steered in the other direction.

[0044] The movement knob (130) can be positioned so as to be movable in the forward and backward directions on the main body (110).

[0045] When the moving knob (130) is moved forward and backward in the main body (110), the moving knob (130) can change the shape of the leaflet member (500). For example, when the moving knob (130) is moved forward, the end of the leaflet member (500) can change into a straight shape, and when the moving knob (130) is moved backward, the end of the leaflet member (500) can change into a cage shape.

[0046] The moving knob (130) can be drivably connected to the leaflet member (500) via the catheter rod (300). The catheter rod (300) can be rotatably arranged on the moving knob (130). When the moving knob (130) is moved forward and backward relative to the main body (110), the catheter rod (300) can be rotated by the rotation guide (170), and the leaflet member (500) can be twisted at the end of the catheter rod (300) by the rotation of the catheter rod (300). In the present embodiment, the catheter rod (300) is rotatably arranged on the moving knob (130), but is not limited thereto, and the catheter rod (300) can also be fixedly arranged on the moving knob (130). In this case, the moving knob (130) is arranged to be movable in the circumferential direction of the main body (110), so that when the moving knob (130) is moved in the forward and backward directions and the circumferential direction in the main body (110), the catheter rod (300) can be rotated while being moved in the forward and backward direction in the main body (110) by the moving knob (130) that moves in the forward and backward directions and the circumferential direction, and the leaflet member (500) can be twisted at the end of the catheter rod (300) by the rotation of the catheter rod (300).

[0047] The supporter (140) can guide both ends of the steering wire (700) to the upper and lower parts of the steering knob (120). The supporter (140) can have guide grooves formed therein to guide both ends of the steering wire (700) to the upper and lower parts of the steering knob (120). The supporter (140) can be fixedly installed inside the main body (110). The supporter (140) can be placed between the steering knob (120) and the moving knob (130) within the main body (110).

[0048] The cover (150) can cover and protect the front end of the main body (110). A catheter tube (200) can pass through the cover (150). The cover (150) can be arranged to surround the connection portion between the main body (110) and the catheter tube (200). The cover (150) can be provided in a tapered cone shape with a downwardly sloping surface toward the front. The cover (150) can be made of an elastic material such as rubber.

[0049] The fixed knob (160) can selectively fix the rotational state of the steering knob (120). The fixed knob (160) can be rotatably installed on the main body (110). The fixed knob (160) can be rotatably coupled to the main body (110) with a washer therebetween. The rotational axis of the fixed knob (160) can be arranged on the same extension line as the rotational axis of the steering knob (120). When the steering knob (120) is rotated at a certain angle and the rotational state of the steering knob (120) is to be maintained, the user can fix the rotational axis of the steering knob (120) by rotating the fixed knob (160) in one direction.

[0050] The rotation guide (170) can rotate the catheter rod (300) in the circumferential direction of the main body (110) when the moving knob (130) is moved. The rotation guide (170) can be connected to the catheter rod (300). In the present embodiment, the rotation guide (170) is connected to the catheter rod (300), but the rotation guide (170) can also be connected to the moving knob (130). In this case, when the moving knob (130) is moved in the forward and backward directions and circumferential directions in the main body (110), the catheter rod (300) can be rotated while being moved in the forward and backward directions in the main body (110) by the moving knob (130) that moves in the forward and backward directions and circumferential directions. The rotation guide (170) can include a guide piece (171) and a rotating knob (172).

[0051] The guide piece (171) can guide the rotation of the rotary knob (172). A guide groove (171-1) can be provided on the side wall of the guide piece (171) in which at least a part of the rotary knob (172) can be rotated. A space can be formed inside the guide piece (171) in which at least another part of the rotary knob (172) can be rotated.

[0052] The rotation knob (172) can be guided in rotation by the guide piece (171). The rotation knob (172) may be a knob provided in the shape of a hammer. When the moving knob (130) is moved, the rotation knob (172) can be rotated along the guide groove (171-1) of the guide piece (171), and the catheter rod (300) can be rotated in conjunction with the rotation of the rotation guide (170). When the plurality of expansion leaflet parts (520) described below are unfolded in a cage shape, the plurality of expansion leaflet parts (520) can be extended so that the angle between adjacent expansion leaflet parts (520) becomes a predetermined leaflet angle. The length of the guide groove (171-1) can limit the rotation of the catheter rod (300) so that the rod (300) rotates at a limiting angle smaller than the leaflet angle when the catheter rod (300) is rotated by the rotary knob (172). The limiting angle can be, for example, approximately 1 / 2 of the leaflet angle. By limiting the length of the guide groove (171-1), when the catheter rod (300) is rotated in a state where the plurality of expansion leaflet parts (520) are converted into a flower shape, adjacent expansion leaflet parts (520) can be prevented from overlapping or entangled with each other, and can effectively contact the lesion tissue. The catheter tube (200) can be connected to the handle (100). The catheter tube (200) can be provided in a hollow tube shape. A catheter rod (300) and a leaflet member (500) may be arranged inside the catheter tube (200). The catheter tube (200) may be steered in two directions (one direction or the other direction) by the steering knob (120) of the handle (100). In the present embodiment, the catheter tube (200) may be steered in two directions by the steering knob (120), but is not limited thereto, and depending on a change in the design of the steering knob (120), the catheter tube (200) may be steered in various directions, such as four directions, six directions, or eight directions.

[0053] A ring electrode (820) may be placed at the end of the catheter tube (200). In the present embodiment, two ring electrodes (820) may be placed longitudinally spaced apart from each other at the end of the catheter tube (200). The ring electrode (820) may be provided in a ring shape that surrounds the outer diameter surface of the catheter tube (200). The ring electrode (820) may be supplied with power through the handle (100). The ring electrode (820) may be electrically connected to a printed circuit board (180) for a connector of the handle (100) via a terminal channel (840).

[0054] The catheter rod (300) can be arranged to be movable in the longitudinal direction within the catheter tube (200). One end of the catheter rod (300) can be inserted and removed from the catheter tube (200) by adjusting the movement knob (130), and can be rotated in the catheter tube (200) by adjusting the rotation guide (170). A leaflet member (500) can be arranged on the outer diameter side of the catheter rod (300). A rod tip (400) can be connected to the end of the catheter rod (300).

[0055] The rod tip (400) can be coupled to the end of the catheter rod (300). The end of the leaflet member (500) can be fixed to the rod tip (400). A plurality of tip electrodes (810) can be arranged on the rod tip (400). In the present embodiment, two tip electrodes (810) can be arranged to be spaced apart from each other in the longitudinal direction of the rod tip (400). The tip electrode (810) can be provided in a ring shape or a cap shape that surrounds the outer diameter surface of the rod tip (400). The tip electrode (810) can be supplied with power through the handle (100). The tip electrode (810) can be electrically connected to a printed circuit board (180) for a connector of the handle (100) via a terminal channel (840).

[0056] The leaflet member (500) can be selectively spread in the outer diameter direction of the catheter rod (300) when the catheter rod (300) is moved in the longitudinal direction. The leaflet member (500) can be twisted at the end of the catheter rod (300) when the catheter rod (300) is rotated. The leaflet member (500) can be arranged on the outer surface side of the catheter rod (300). The end of the leaflet member (500) can be fixed to the rod tip (400). The leaflet member (500) can be made of a flexible material. For example, the leaflet member (500) can be made of a liquid crystal polymer (LCP) material. Copper, stainless steel, platinum, liquid crystal polymer, polyimide, gold, and the like, which are diamagnetic or paramagnetic materials, can also be used for the leaflet member (500). The leaflet member (500) can adjust the bending strength by adjusting the thickness. The leaflet member (500) can include a support leaflet part (510) and an expansion leaflet part (520).

[0057] The support leaflet portion (510) can be fixedly positioned between the inner diameter surface of the catheter tube (200) and the outer diameter surface of the catheter rod (300). The support leaflet portion (510) can be wound in a screw shape on the outer diameter surface of the catheter rod (300). The end of the support leaflet portion (510) can be connected to branch into a plurality of expansion leaflet portions (520).

[0058] The expansion leaflet portion (520) may be positioned so as to be exposed between the rod tip (400) and the catheter tube (200). One end of the expansion leaflet portion (520) may be branched into a plurality of branches from the end of the support leaflet portion (510), and the other end of the expansion leaflet portion (520) may be converged and fixed to the rod tip (400). The plurality of expansion leaflet portions (520) may be deployed in a straight shape parallel to the catheter rod (300) or changed into a cage shape according to the movement of the catheter tube (200). For example, when the end of the catheter rod (300) is pulled out from the catheter tube (200), the plurality of expansion leaflet portions (520) may be deployed in a straight shape parallel to the catheter rod (300). When the end of the catheter rod (300) is inserted into the catheter tube (200), the plurality of expansion leaflet portions (520) can be expanded in the outer diameter direction of the catheter rod (300) in the form of a cage. In addition, the plurality of expansion leaflet portions (520) can be twisted into a flower shape by a rotation guide (170).

[0059] A plurality of leaflet electrodes (600) may be arranged on the leaflet member (500). The leaflet electrode (600) may include a front electrode (610) and a back electrode (620). The front electrode (610) may be provided as a pair spaced apart from each other in the longitudinal direction on the front side of one end of the leaflet member (500). The back electrode (620) may be arranged on the back side of the other end of the leaflet member (500). When the leaflet member (500) is rotated by the rotation guide (170), the back electrode (620) may be brought into contact with the lesioned area of ​​the heart so as not to overlap with the front electrode (610). When the leaflet member (500) is rotated by the rotation guide (170) so that the plurality of expansion leaflet parts (520) are twisted roughly in a flower shape, the plurality of rear electrodes (620) formed on the rear surfaces of the plurality of expansion leaflets (520) can be exposed in the forward direction, thereby increasing the number of electrodes that can contact heart tissue. The leaflet electrode (600) can be supplied with power through the handle (100). The leaflet electrode (600) can be electrically connected to the printed circuit board (180) for the connector of the handle (100) via the terminal channel (840).

[0060] The steering wire (700) can steer the catheter tube (200) in a predetermined direction by the operation of the steering knob (120). The steering wire (700) can be placed inside the catheter tube (200). Both ends of the steering wire (700) can be connected to the steering knob (120) by being guided by a supporter (140) in the handle (100), and the central portion of the steering wire (700) can be placed at the end of the catheter tube (200). The central portion of the steering wire (700) can be supported on the catheter tube (200) by a support ring (830). When one end of the steering wire (700) is pulled by the steering knob (120), the catheter tube (200) can be steered in one direction, and when the other end of the steering wire (700) is pulled by the steering knob (120), the catheter tube (200) can be steered in the other direction.

[0061] As described above, the present invention has excellent advantages such as providing an adjustable leaflet member in the shape of a cage at the end of a catheter, so that the electrode of the leaflet member can be exposed to the heart as closely as possible, and since a plurality of electrodes are configured to apply pulse electricity to a wide area of ​​the heart, arrhythmia can be effectively treated, and since the shape of the leaflet member can be adjusted to a cage shape, a straight shape, a flower shape, etc., effective treatment can be performed according to the shape of the tissue in the heart.

[0062] The embodiments described above merely illustrate some examples of the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention is not limited to the described embodiments. Various changes, modifications, or substitutions may be possible within the scope of the technical idea of ​​the present invention by a person skilled in the art, and all such implementations should be considered to fall within the scope of the technical idea of ​​the present invention.

Claims

1. Handle; A catheter tube connected to the above handle; A catheter rod movably positioned inside the catheter tube so that the end portion can be inserted into and extracted from the catheter tube; A rod tip coupled to the end of the above catheter rod; A leaflet member disposed on the outer surface of the catheter rod and selectively unfoldable in the outer diameter direction of the catheter rod when the catheter rod is moved in the longitudinal direction; and Including a leaflet electrode disposed on the above leaflet member, Cage-type electric pulse catheter.

2. In paragraph 1, The above leaflet electrode is A front electrode arranged on the front of the above leaflet member; and Including a back electrode arranged on the back surface of the above leaflet member, Cage-type electric pulse catheter.

3. In paragraph 1, The above leaflet is missing A support leaflet portion fixedly positioned between the inner diameter surface of the catheter tube and the outer diameter surface of the catheter rod; and It includes an expansion leaflet portion, one end of which branches into multiple pieces at the end of the support leaflet portion and the other end converges to the load tip, A plurality of the above expansion leaflets When the end of the catheter rod is withdrawn from the catheter tube, it unfolds parallel to the catheter rod, and when the end of the catheter rod is introduced into the catheter tube, it unfolds in the outer diameter direction of the catheter rod. Cage-type electric pulse catheter.

4. In paragraph 2, The above handle is Including a rotation guide for rotating the above leaflet member in the circumferential direction of the catheter rod, The above rotation guide A guide piece having a guide groove formed on the side wall; and A rotation knob is disposed on the guide piece so as to be rotatable along the guide groove and is connected to the catheter rod via a moving knob, The above back electrode is When the above leaflet member is rotated by the above rotation guide, it comes into contact with the lesion area so as not to overlap with the front electrode. Cage-type electric pulse catheter.

5. In paragraph 1, Further comprising a steering wire for steering the catheter tube in a predetermined direction, Cage-type electric pulse catheter.

6. In paragraph 5, The above handle is entity; A steering knob that is rotatably positioned on the main body and, when rotated on the main body, pushes or pulls the steering wire to steer the catheter tube in a predetermined direction; and A moving knob is disposed so as to be movable in the forward and backward direction on the main body, and when the main body is moved in the forward and backward direction, the catheter rod is moved longitudinally so that the leaflet member is selectively unfolded. Cage-type electric pulse catheter.

7. In paragraph 1, A tip electrode provided on the outer surface of the above load tip; and Further comprising a ring electrode provided at the end of the catheter tube; Cage-type electric pulse catheter.

8. In paragraph 6, The above steering wire The central portion is placed at the end of the catheter tube, and both ends are connected to the steering knob, The above steering knob One end of the steering wire is connected to the upper part and the other end of the steering wire is connected to the lower part, so that when rotated in one direction, the one end of the steering wire is pulled in a first direction to steer the catheter tube in the first direction, and when rotated in the other direction, the other end of the steering wire is pulled in a second direction to steer the catheter tube in the second direction. Cage-type electric pulse catheter.

9. In paragraph 6, The above handle is Further comprising a fixed knob for selectively fixing the rotational state of the steering knob. Cage-type electric pulse catheter.

10. In paragraph 6, The above handle is A supporter installed in the main body to guide both ends of the steering wire to the upper and lower parts of the steering knob; and Further comprising a cover arranged to surround the connection portion between the main body and the catheter tube. Cage-type electric pulse catheter.

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