Annular mapping catheter

Abstract

The utility model relates to the technical field of medical instruments, in particular to an annular mapping catheter which comprises a handle, a catheter body, an annular electrode assembly and a bending adjusting assembly, and the catheter body is connected with the handle; the annular electrode assembly is connected with the end, away from the handle, of the tube body and provided with a mapping electrode. The bending adjusting assembly comprises a first operation part arranged on the handle and a first pull wire connected with the first operation part, the first pull wire extends in the axial direction of the tube body, and the end, away from the first operation part, of the first pull wire is connected with the annular electrode assembly; wherein the first operation part can drive the first pull wire to move in the axial direction of the catheter body so that the first pull wire can pull the annular electrode assembly to deflect towards the first pull wire, the annular mapping catheter can adjust the bending of the annular electrode assembly, and then the annular mapping catheter can be matched with an ablation operation to conduct accurate intracardiac potential mapping on the ablation annular face of a pulmonary vein opening.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a ring mapping catheter. BACKGROUND

[0002] Catheter ablation technology has been widely used in clinical ablation of various arrhythmias, such as atrial fibrillation, premature ventricular contraction, and ventricular tachycardia. With the deepening understanding of arrhythmia mechanism and the continuous improvement of ablation instruments, the success rate of catheter ablation of arrhythmia has been significantly improved.

[0003] The current ring mapping catheter has the functions of mapping and stimulation. The working principle is that after the transseptal sheath is inserted into the foramen ovale, the mapping catheter reaches each pulmonary vein ostium along the transseptal sheath channel for mapping and stimulation. Whether the mapping catheter can smoothly reach each pulmonary vein depends on the bending function of the transseptal sheath. First, the transseptal sheath is bent to align with each pulmonary vein ostium, and then the mapping catheter is extended to record or stimulate the potential of the current pulmonary vein, and the recording and stimulation of each pulmonary vein are completed in turn. If the transseptal sheath is not aligned with the pulmonary vein ostium after bending, it will be difficult for the mapping catheter to reach the designated pulmonary vein for mapping and stimulation. Therefore, the existing ring mapping catheter cannot accurately map the intracardiac potential of the ablation ring surface of the pulmonary vein ostium in cooperation with the ablation operation. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a ring mapping catheter which can bend the ring electrode assembly and accurately map the intracardiac potential of the ablation ring surface of the pulmonary vein ostium in cooperation with the ablation operation.

[0005] To this end, in a first aspect, the embodiments of the present application provide a ring mapping catheter, comprising: a handle; a tube body connected with the handle; a ring electrode assembly connected with an end of the tube body away from the handle, the ring electrode assembly having a mapping electrode; and a bending assembly, the bending assembly comprising a first operation part provided on the handle and a first pull wire connected with the first operation part, the first pull wire extending along the axial direction of the tube body, and an end of the first pull wire away from the first operation part being connected with the ring electrode assembly; wherein the first operation part can drive the first pull wire to move along the axial direction of the tube body, so that the first pull wire deflects the ring electrode assembly towards the first pull wire.

[0006] In a possible implementation manner, the ring electrode assembly has a connecting segment coaxially arranged with the tube body, and the first pull wire is connected with the outer edge of the connecting segment.

[0007] In a possible implementation manner, the outer edge of the connecting segment is provided with two connection points, the two connection points are oppositely arranged on both sides of the center of the connecting segment, and the first pull wire is provided with two wires, the two wires of the first pull wire are respectively connected with the two connection points.

[0008] In a possible implementation, when the first operation part makes one of the first pull wires in a tension state, the other first pull wire is in a relaxed state.

[0009] In a possible implementation, the first operation part comprises: a first knob rotatably arranged on the handle, an inner surface of the first knob being provided with an inner threaded structure; and two first sliders oppositely arranged in the first knob, outer circumferential surfaces of the two first sliders being respectively provided with outer threaded structures threadedly connected with the inner threaded structure, the two first sliders being slidably arranged along an axial direction of the handle; and the two first pull wires are respectively connected with the two first sliders.

[0010] In a possible implementation, the handle is provided with a first sliding rail structure along an axial direction, and the two first sliders are respectively in sliding cooperation with the first sliding rail structure.

[0011] In a possible implementation, the first operation part comprises a second knob rotatably arranged on the handle, and the second knob is provided with two fixed points, and the two fixed points are respectively connected with the two first pull wires.

[0012] In a possible implementation, the two fixed points are respectively provided with a winding portion and an avoiding portion along two sides in a circumferential direction, and when one of the first pull wires is wound on the winding portion, the other first pull wire is in the avoiding portion.

[0013] In a possible implementation, the side wall of the tube body is provided with a first sliding hole along an extension direction, and the first pull wire is slidably arranged in the first sliding hole.

[0014] In a possible implementation, the diameter of the annular electrode assembly is adjustable, and the annular mapping catheter further comprises a diameter adjusting assembly, the diameter adjusting assembly comprising a second operation part arranged on the handle and a second pull wire connected with the second operation part, the second pull wire being arranged along the extension direction of the tube body and the annular electrode assembly, and an end of the second pull wire away from the second operation part being connected with a distal end of the annular electrode assembly away from the tube body, and the second operation part being capable of pulling the distal end of the annular electrode assembly through the second pull wire to change the diameter of the annular electrode assembly.

[0015] In a possible implementation, the handle is provided with a second sliding rail structure along an axial direction, the second operation part comprises a second slider, the second slider being in sliding cooperation with the second sliding rail structure, and the second pull wire being connected with the second slider.

[0016] In a possible implementation, there is a damping force between the second slider and the second sliding rail structure for positioning the second slider.

[0017] In a possible implementation, the side wall of the tube body and the annular electrode assembly is provided with a second sliding hole along an extension direction, and the second pull wire is slidably arranged in the second sliding hole.

[0018] In a possible implementation, the inner communication of the tube body and the ring electrode assembly is provided with an infusion channel, the end of the tube body away from the ring electrode assembly is provided with a luer joint in communication with the infusion channel, and the ring electrode assembly is provided with an output hole in communication with the infusion channel.

[0019] In a possible implementation, the ring electrode assembly comprises a tube material, the mapping electrode is sleeved on the outer periphery of the tube material, a luer joint is arranged at the handle, the luer joint is electrically connected to the mapping electrode through a wire, and the wire is prearranged in the tube body and the ring electrode assembly.

[0020] According to the ring mapping catheter provided by the embodiment of the present application, the first pull wire is driven by operating the first operation part, the whole ring electrode assembly is deflected towards the pulling direction of the first pull wire by the first pull wire, even if the puncture sheath is not aligned with the pulmonary vein after being bent, the ring electrode assembly can reach the designated pulmonary vein for mapping and stimulation by being bent, and accurate intracardiac potential mapping of the ablation ring surface of the pulmonary vein can be performed in cooperation with the ablation operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings incorporated into the specification and constituting a part of the specification show embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.

[0023] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.

[0024] Figure 1 A structure schematic diagram of a ring mapping catheter provided by an embodiment of the present application is shown;

[0025] Figure 2 A structure schematic diagram of a ring mapping catheter provided by an embodiment of the present application when the ring electrode assembly is upwardly deflected is shown;

[0026] Figure 3 A structure schematic diagram of a ring mapping catheter provided by an embodiment of the present application when the ring electrode assembly is downwardly deflected is shown;

[0027] Figure 4A structural schematic diagram of a tube body, a ring motor and a bending adjusting assembly provided by an embodiment of the present application is shown.

[0028] Figure 5 A structural schematic diagram of a cross section of a first operating part provided by an embodiment of the present application is shown.

[0029] Figure 6 A structural schematic diagram of a cross section of a first operating part provided by an embodiment of the present application is shown.

[0030] Figure 7 A structural schematic diagram of another first operating part connected with a first pull wire provided by an embodiment of the present application is shown.

[0031] Figure 8 A structural schematic diagram of a first operating part is shown. Figure 7 A structural schematic diagram of another view of a first operating part is shown.

[0032] Figure 9 A structural schematic diagram of a cross section of a tube body provided by an embodiment of the present application is shown.

[0033] Figure 10 A structural schematic diagram of a diameter adjusting assembly and a ring electrode assembly provided by an embodiment of the present application is shown.

[0034] Figure 11 A structural schematic diagram of a ring electrode assembly and a second pull wire provided by an embodiment of the present application is shown.

[0035] Figure 12 A schematic diagram of a ring electrode assembly before and after diameter change provided by an embodiment of the present application is shown.

[0036] Figure 13 A structural schematic diagram of a perfusion channel and a luer joint provided by an embodiment of the present application is shown.

[0037] Figure 14 A structural schematic diagram of a main shaft of a handle, a first operating part and a second operating part provided by an embodiment of the present application is shown.

[0038] Figure 15 A structural schematic diagram of a cross section of a ring electrode assembly provided by an embodiment of the present application is shown.

[0039] Explanation of reference signs:

[0040] 1, handle; 11, first slide rail structure; 12, second slide rail structure; 13, main shaft;

[0041] 2, tube body;

[0042] 3, ring electrode assembly; 31, connecting section; 32, tube material; 33, mapping electrode;

[0043] 4, bending adjustment assembly; 41, first operation part; 411, first knob; 412, first slider; 413, second knob; 4131, fixed point; 4132, winding part; 4133, avoiding part; 42, first pull wire;

[0044] 5, diameter adjustment assembly; 51, second operation part; 511, second slider; 52, second pull wire;

[0045] 6, infusion channel; 7, luer joint; 8, luer joint; 9, lead wire. DETAILED DESCRIPTION

[0046] In order to make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be used in conjunction with the accompanying drawings for the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, any other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0047] The following disclosure provides many different embodiments, or examples, for implementing different structures of the embodiments of the present application. For the purpose of simplicity and clarity, the descriptions of the specific examples in the following will be described. Of course, they are only examples and are not intended to limit the embodiments of the present application. In addition, the embodiments of the present application can repeatedly refer to numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings being discussed.

[0048] For the convenience of description, spatial relative terms can be used in the description to describe the relative positional relationship or movement of one element or feature with respect to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both the up and down positions. The device can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the description are interpreted accordingly.

[0049] In order to solve the problems in the prior art, the application provides a ring-shaped mapping catheter which can bend a ring-shaped electrode assembly, and thus can accurately map the intracardiac electrical potential of the ablation ring surface of the pulmonary vein orifice in cooperation with the ablation operation.

[0050] As shown in Figures 1-15 The application provides a ring-shaped mapping catheter, which comprises a handle 1, a tube body 2, a ring-shaped electrode assembly 3, and a bending assembly 4.

[0051] The tube body 2 is connected with the handle 1. Specifically, the tube body 2 can be connected with the handle 1 at one end, or can be arranged through the handle 1, which is not limited here. The tube body 2 can adopt a solid structure or a hollow structure, as long as it can connect the handle 1 and the ring-shaped electrode assembly 3.

[0052] The ring-shaped electrode assembly 3 is connected with the end of the tube body 2 away from the handle 1, and the ring-shaped electrode assembly has a mapping electrode 33.

[0053] The bending assembly 4 comprises a first operation part 41 arranged on the handle 1 and a first pull wire 42 connected with the first operation part 41. The first pull wire 42 extends along the axial direction of the tube body 2, and the end of the first pull wire 42 away from the first operation part 41 is connected with the ring-shaped electrode assembly 3.

[0054] Specifically, the first operation part 41 can drive the first pull wire 42 to move along the axial direction of the tube body 2, so that the first pull wire 42 pulls the ring-shaped electrode assembly 3 to deflect towards the first pull wire 42.

[0055] In the application, the first operation part 41 drives the first pull wire 42, and the first pull wire 42 pulls the ring-shaped electrode assembly 3 to deflect towards the pulling direction of the first pull wire 42. Even if the puncture sheath is not aligned with the pulmonary vein orifice after bending, the ring-shaped electrode assembly 3 can be bent to reach the designated pulmonary vein for mapping and stimulation, and the intracardiac electrical potential of the ablation ring surface of the pulmonary vein orifice can be accurately mapped in cooperation with the ablation operation.

[0056] Specifically, the first operation part 41 is arranged at the handle 1, which facilitates pulling the first pull wire 42. The first pull wire 42 is arranged along the extension direction of the tube body 2 and is connected with the ring-shaped electrode assembly 3. The first pull wire 42 pulls the ring-shaped electrode assembly 3 to deflect as a whole, and thus the bending of the ring-shaped electrode assembly 3 is realized. The first pull wire 42 can be arranged in one, which drives the ring-shaped electrode assembly 3 to deflect towards one direction. By rotating the handle 1 to drive the tube body 2 and the ring-shaped electrode assembly 3 to rotate, the ring-shaped electrode assembly 3 can rotate within a range of 360°, and thus the bending towards different directions is realized to accurately map the intracardiac electrical potential.

[0057] In the related art, the current loop mapping catheter has the functions of mapping and stimulation. The working principle is that the mapping catheter reaches each pulmonary vein orifice along the puncture sheath channel to perform mapping and stimulation after the puncture sheath is inserted into the foramen ovale. Whether the mapping catheter can reach each pulmonary vein depends on the bending function of the puncture sheath. First, the puncture sheath is bent to align with each pulmonary vein orifice, and then the mapping catheter is extended to record or stimulate the potential of the current pulmonary vein. The recording and stimulation of each pulmonary vein are completed in turn. If the puncture sheath is not aligned with the pulmonary vein orifice after bending, it will be difficult for the mapping catheter to reach the designated pulmonary vein for mapping and stimulation. Therefore, the existing loop mapping catheter cannot accurately map the intracardiac potential of the ablation ring surface of the pulmonary vein orifice in cooperation with the ablation operation.

[0058] In the embodiments of the present application, the bending assembly 4 is provided. The first operating part 41 of the bending assembly 4 drives the first pull wire 42, and the first pull wire 42 pulls the loop electrode assembly 3, so that the loop electrode assembly 3 deflects towards the pulling direction of the first pull wire 42, and the bending of the loop electrode assembly 3 is realized. Even if the puncture sheath is not aligned with the pulmonary vein orifice after bending, the loop electrode assembly 3 can be bent to reach the designated pulmonary vein for mapping and stimulation, and the intracardiac potential of the ablation ring surface of the pulmonary vein orifice can be accurately mapped in cooperation with the ablation operation.

[0059] In some embodiments, the loop electrode assembly 3 has a connecting section 31 coaxially arranged with the tube body 2, and the first pull wire 42 is connected with the outer edge of the connecting section 31.

[0060] In the present application, a connecting section 31 coaxially arranged with the tube body 2 is arranged at the end of the loop electrode assembly 3, so that the first pull wire 42 extends along the axial direction of the tube body 2 as a whole, facilitating the first pull wire 42 to exert force and drive the loop electrode assembly 3 to deflect. The first pull wire 42 is connected with the outer edge of the connecting section 31, so that the first pull wire 42 can effectively drive the entire loop electrode assembly 3 to deflect towards the direction of the first pull wire 42 when exerting force.

[0061] Specifically, the connecting section 31 can be directly inserted into one end of the tube body 2, and then fixed by using glue or fusion, or the connection and fixation of the connecting section 31 and the tube body 2 can be completed in other directions.

[0062] In some embodiments, the outer edge of the connecting section 31 is provided with two connection points, and the two connection points are oppositely arranged on both sides of the center of the connecting section 31. The first pull wire 42 is provided with two first pull wires 42, and the two first pull wires 42 are respectively connected with the two connection points.

[0063] In this application, by setting two connection points on the outer edge of the connecting section 31, and the two connection points being located on both sides of the center of the connecting section 31 respectively, and the two first pull wires 42 connecting the two connection points respectively, the annular electrode assembly 3 can be pulled in one direction by one of the first pull wires 42 and in another direction by the other first pull wire 42. This eliminates the need to rotate the handle 1 to drive the tube body 2 and the annular electrode assembly 3 to reach the designated position, further improving the convenience of operation.

[0064] Specifically, the line connecting the two connection points passes through the center of the connecting segment 31, ensuring that the deflection directions of the annular electrode assembly 3 are exactly two opposite directions, allowing for more precise control of the bending of the annular electrode assembly 3. Alternatively, the connection between the two connection points may not pass through the center of the connecting segment 31, still achieving effective bending of the annular electrode assembly 3.

[0065] In some embodiments, when the first operating unit 41 causes one of the first pull wires 42 to be in a taut state, the other first pull wire 42 is in a relaxed state.

[0066] In this application, the first operating unit 41 can simultaneously control two first pull wires 42. When one of the first pull wires 42 is in a taut state, the other first pull wire 42 is in a slack state, thereby ensuring that the annular electrode assembly 3 can effectively deflect toward the taut first pull wire 42.

[0067] like Figure 2 As shown, specifically, the two first pull wires 42 are located at the top and bottom of the tube body 2, respectively, and are both arranged along the extension direction of the tube body 2. When the upper first pull wire 42 is in a taut state, the lower first pull wire 42 is in a slack state, thereby causing the annular electrode assembly 3 to deflect upwards; as Figure 3 As shown, when the lower first pull wire 42 is in a taut state, the upper first pull wire 42 is in a slack state, thereby causing the annular electrode assembly 3 to deflect downward.

[0068] In one specific embodiment, the first operating part 41 includes: a first knob 411, rotatably disposed on the handle 1, the inner surface of the first knob 411 being provided with an internal thread structure; and two first sliders 412, disposed opposite to each other inside the first knob 411, the outer peripheral surfaces of the two first sliders 412 being respectively provided with an external thread structure that is threadedly connected to the internal thread structure, the two first sliders 412 being slidably disposed along the axial direction of the handle 1; wherein, two first pull wires 42 are respectively connected to the two first sliders 412.

[0069] In the present application, the handle 1 is provided with a main shaft 13, the first knob 411 is rotatably arranged on the outer periphery of the main shaft 13, and a space is left between the first knob 411 and the main shaft 13. Two first sliders 412 are respectively located in the space between the first knob 411 and the main shaft 13. The handle 1 is provided with a limiting portion to limit the first knob 411 in the axial direction, so that the first knob 411 can only rotate in the circumferential direction. The two first sliders 412 are oppositely arranged and slide in the axial direction of the handle 1. When the first knob 411 is rotated, it can drive the two first sliders 412 to move in opposite directions, thereby realizing that one of the two first pull wires 42 is in a tension state and the other is in a relaxed state, and achieving the deflection of the annular electrode assembly 3.

[0070] Specifically, the rotation of the first knob 411 drives the first slider 412 to slide in the axial direction of the handle 1, which can accurately control the deflection angle of the annular electrode assembly 3. Moreover, the first knob 411 is connected with the first slider 412 through threads, and there is friction between the threads. After the first knob 411 is rotated by a certain angle, the annular electrode assembly 3 can be self-positioned, so that the annular electrode assembly 3 can be stably maintained in a deflected state.

[0071] As shown in the drawings, Figure 6 In some embodiments, the handle 1 is provided with a first sliding rail structure 11 in the axial direction, and the two first sliders 412 are respectively in sliding cooperation with the first sliding rail structure 11.

[0072] In the present application, the first sliding rail structure 11 is arranged on the main shaft 13, and the two first sliders 412 are respectively located on both sides of the main shaft 13 and are respectively in sliding cooperation with the first sliding rail structure 11. The first sliding rail structure 11 can guide the first slider 412, so that the first slider 412 can only slide in the axial direction of the handle 1 and cannot rotate, thereby ensuring that the first slider 412 can smoothly slide in the axial direction of the handle 1 when the first knob 411 is rotated.

[0073] Specifically, the two first sliders 412 are half-cylindrical structures and are respectively located on both sides of the first sliding rail structure 11. A sliding groove and a sliding portion in sliding cooperation are arranged between the first sliding rail structure 11 and the first slider 412. The sliding portion is slidably arranged in the sliding groove, thereby ensuring that the first slider 412 can stably slide along the first sliding rail structure 11.

[0074] As shown in the drawings, Figures 7-8 In another specific embodiment, the first operation portion 41 includes a second knob 413 rotatably arranged on the handle 1. The second knob 413 is provided with two fixed points 4131, and the two fixed points 4131 are respectively connected to the two first pull wires 42.

[0075] In the present application, the first operation part 41 can further include a second knob 413. Two fixed points 4131 are arranged on the second knob 413, and the two fixed points 4131 are respectively connected to the two first pull wires 42. When the second knob 413 is rotated, the two first pull wires 42 are respectively driven by the two fixed points 4131, so that one of the first pull wires 42 is in a tension state, and the other first pull wire 42 is in a relaxed state, thereby realizing the deflection of the ring electrode assembly 3.

[0076] Specifically, when the second knob 413 is rotated in the clockwise direction, the upper first pull wire 42 is tightened, and the lower first pull wire 42 is relaxed, so that the ring electrode assembly 3 is deflected upward. When the second knob 413 is rotated in the counterclockwise direction, the lower first pull wire 42 is tightened, and the upper first pull wire 42 is relaxed, so that the ring electrode assembly 3 is deflected downward.

[0077] In some embodiments, the two sides of the fixed point 4131 in the circumferential direction are respectively provided with a winding part 4132 and an avoiding part 4133. When one of the first pull wires 42 is wound on the winding part 4132, the other first pull wire 42 is in the avoiding part 4133.

[0078] In the present application, the two fixed points 4131 are oppositely arranged on the second knob 413, and the two sides of each fixed point 4131 in the circumferential direction are respectively provided with a winding part 4132 and an avoiding part 4133. When the second knob 413 is rotated in the clockwise direction, the upper first pull wire 42 is wound on the winding part 4132 on one side of the upper fixed point 4131, so that the upper first pull wire 42 is tightened, and the lower first pull wire 42 is in the avoiding part 4133 on one side of the lower fixed point 4131, so that the lower first pull wire 42 is relaxed. When the second knob 413 is rotated in the counterclockwise direction, the lower first pull wire 42 is wound on the winding part 4132 on one side of the lower fixed point 4131, so that the lower first pull wire 42 is tightened, and the upper first pull wire 42 is in the avoiding part 4133 on one side of the upper fixed point 4131, so that the upper first pull wire 42 is relaxed.

[0079] In some embodiments, the side wall of the tube body 2 is provided with a first sliding hole in the extension direction, and the first pull wire 42 is slidingly arranged in the first sliding hole.

[0080] In the present application, by arranging the first sliding hole on the side wall of the tube body 2, and slidingly arranging the first pull wire 42 in the first sliding hole, the first pull wire 42 can be hidden and arranged, the influence generated during the tensioning and relaxing of the first pull wire 42 is reduced, and the first pull wire 42 can be protected, thereby ensuring the use reliability of the first pull wire 42.

[0081] Specifically, the tube body 2 includes an inner membrane and an outer tube, which are fused together. At the same time, a first pull wire 42 is pre-embedded between the inner membrane and the outer tube. The first pull wire 42 has a thin diameter and a smooth surface, and can still slide axially relative to the tube body 2 after the tube body 2 is shaped.

[0082] like Figure 10 As shown, in some embodiments, the diameter of the annular electrode assembly 3 is adjustable. The annular mapping catheter also includes a diameter adjustment assembly 5. The diameter adjustment assembly 5 includes a second operating part 51 disposed on the handle 1 and a second pull wire 52 connected to the second operating part 51. The second pull wire 52 is disposed along the extension direction of the tube body 2 and the annular electrode assembly 3. One end of the second pull wire 52 away from the second operating part 51 is connected to the distal end of the annular electrode assembly 3 away from the tube body 2. The second operating part 51 can pull the distal end of the annular electrode assembly 3 through the second pull wire 52 to change the diameter of the annular electrode assembly 3.

[0083] Specifically, since the diameter of the opening of each pulmonary vein varies, using a mapping catheter of the same fixed diameter to map and stimulate the potential of pulmonary veins of different diameters will inevitably result in some electrodes not being properly attached. For electrodes that are not properly attached, the potential of the pulmonary vein may not be recorded or the recorded potential may be inaccurate. At the same time, during stimulation, because the electrodes are not in contact with the tissue, the electrodes may discharge while suspended, which may cause damage to the human body.

[0084] In this application, the annular electrode assembly 3 is configured with an adjustable diameter. Furthermore, the second operating part 51 of the diameter adjustment assembly 5 can drive the second pull wire 52, which is directly connected to the distal end of the annular electrode assembly 3. By pulling the second pull wire 52, the distal end of the annular electrode assembly 3 moves towards its center, thereby reducing the diameter of the annular electrode assembly 3. Adjusting the diameter of the annular electrode assembly 3 allows it to be used at pulmonary vein orifices of different diameters, ensuring good contact of the mapping electrode 33 and thus guaranteeing the accuracy of the mapping potential. This avoids damage to the human body due to insufficient contact of the mapping electrode 33 during stimulation.

[0085] In some embodiments, the substrate of the annular electrode assembly 3 has a shape memory metal, which can become annular after extending out of the sheath. The shape memory metal can be a nickel-titanium alloy or the like, and can recover its original shape when the force of the second pull wire 52 is lost.

[0086] Specifically, the ring electrode assembly 3 is formed by shaping a nickel-titanium wire or a nickel-titanium tube into a circle, then coating the shaped nickel-titanium wire or nickel-titanium tube with a polymer layer, then sleeving the mapping electrodes 33 into the polymer layer at a fixed interval, and then reducing the outer diameter of the metal mapping electrodes 33 by forging and pressing the mapping electrodes 33, so as to be stably fixed at the fixed interval position outside the polymer layer. The base body of the ring electrode assembly 3 has a memory metal, which can become a ring shape after extending out of the sheath tube. When the second pull wire 52 pulls the distal end of the ring electrode assembly 3, the diameter of the ring electrode assembly 3 can be reduced. When the second pull wire 52 is released, the ring electrode assembly 3 restores to its original shape when losing external force, so that the diameter is increased.

[0087] As shown in the drawings, in some embodiments, the handle 1 is provided with a second sliding rail structure 12 in the axial direction, and the second operation part 51 includes a second sliding block 511 which is in sliding cooperation with the second sliding rail structure 12, and the second pull wire 52 is connected with the second sliding block 511. Figure 14 In the present application, the second sliding rail structure 12 is arranged on the main shaft 13, and the second sliding block 511 is slid along the second sliding rail structure 12, thereby driving the second pull wire 52 to move. Specifically, when the second sliding block 511 slides towards the direction away from the ring electrode assembly 3, the distal end of the ring electrode assembly 3 is moved towards the center of the ring electrode assembly 3 through the second pull wire 52, thereby reducing the diameter of the ring electrode assembly 3. When the second sliding block 511 slides towards the direction of the ring electrode assembly 3, the ring electrode assembly 3 restores under the action of its own elasticity, thereby increasing the diameter of the ring electrode assembly 3.

[0088] In some embodiments, there is a damping force between the second sliding block 511 and the second sliding rail structure 12 for positioning the second sliding block 511.

[0089] In the present application, the damping force between the second sliding block 511 and the second sliding rail structure 12 can enable the second sliding block 511 to be stably maintained at any position of the second sliding rail structure 12, i.e. after adjusting the diameter of the ring electrode assembly 3, the second sliding block 511 does not need to be manually fixed all the time, thereby improving the convenience of operation.

[0090] Specifically, the damping force can be achieved by arranging a damping layer between the second sliding block 511 and the second sliding rail, and increasing the friction therebetween through the damping layer.

[0091] Alternatively, a special locking structure can also be arranged to lock the second sliding block 511, i.e. after adjusting the diameter of the ring electrode assembly 3, the second sliding block 511 is locked and fixed through the locking structure, so that the ring electrode assembly 3 can maintain a specific diameter.

[0092] ​

[0093] In some embodiments, a second sliding hole is provided on the sidewall of the tube body 2 and the annular electrode assembly 3 along the extending direction, and the second pull wire 52 is slidably disposed in the second sliding hole.

[0094] In this application, a second sliding hole is provided on the side wall of the tube body 2 and the annular electrode assembly 3. By placing the second pull wire 52 inside the second sliding hole, the influence caused by the external placement of the second pull wire 52 is avoided.

[0095] like Figure 13 As shown, in some embodiments, the tube body 2 and the annular electrode assembly 3 are internally connected by an infusion channel 6, and the end of the tube body 2 away from the annular electrode assembly 3 is provided with a Luer connector 7 that communicates with the infusion channel 6. The annular electrode assembly 3 is provided with an output hole that communicates with the infusion channel 6.

[0096] In related technologies, current circular mapping catheters only have mapping and stimulation functions, which are relatively simple.

[0097] In this application, during the procedure, it may sometimes be necessary to flush with saline solution to prevent excessive blood from adhering to the area near the mapping electrode 33, or to replenish saline solution if the procedure is lengthy. The Luer connector 7 is used to connect to an external liquid infusion device, allowing saline solution to be delivered through the infusion channel 6. The saline solution is then discharged through the output port to flush or replenish blood near the mapping electrode 33. Microwires, mapping wires, or other therapeutic or diagnostic instruments can also be inserted through this infusion channel 6 during surgical mapping or stimulation, thereby expanding its functionality.

[0098] like Figure 15 As shown, in some embodiments, the annular electrode assembly 3 includes a tube 32, a calibration electrode 33 is sleeved on the outer periphery of the tube 32, and a Remo connector 8 is provided at the handle 1. The Remo connector 8 is electrically connected to the calibration electrode 33 through a wire 9, which is pre-installed in the tube body 2 and the annular electrode assembly 3.

[0099] In this application, the Remo connector 8 transfers the electrocardiogram (ECG) signal collected by the ring electrode assembly 3 to an external host, displays the collected ECG signal through the host, and simultaneously transfers the stimulation command sent by the host to the ring electrode assembly 3.

[0100] Specifically, in this application, the wire 9 is pre-installed within the tube body 2 and the annular electrode assembly 3 to protect the wire 9 and ensure the reliability of the wire 9 connection.

[0101] The annular mapping catheter drives the first pull wire 42 through the operation of the first operation part 41, deflects the annular electrode assembly 3 as a whole towards the pulling direction of the first pull wire 42 through the first pull wire 42, and even if the puncture sheath is not aligned with the pulmonary vein orifice after being bent, the annular electrode assembly 3 can be bent to reach the designated pulmonary vein for mapping and stimulation, and the ablation ring surface of the pulmonary vein orifice can be accurately mapped by the intracardiac electrical potential in cooperation with the ablation operation. The annular electrode assembly 3 is set in a diameter-adjustable form, and the second operation part 51 of the diameter-adjusting assembly 5 can drive the second pull wire 52, the second pull wire 52 is directly connected with the distal end of the annular electrode assembly 3, and the distal end of the annular electrode assembly 3 is moved towards the center of the annular electrode assembly 3 by pulling the second pull wire 52, thereby realizing the diameter reduction of the annular electrode assembly 3. By adjusting the diameter of the annular electrode assembly 3, it can be suitable for pulmonary vein orifices of different diameters to ensure good adhesion of the mapping electrode 33, thereby ensuring the accuracy of the mapping potential and avoiding the case that the mapping electrode 33 is not fully adhered to the human body during stimulation.

[0102] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0103] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to differentiate one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second", and the like, as well as other ordinal terms, are used herein in a variable way. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of example embodiments.

[0104] The foregoing detailed description of the application has been presented for purposes of illustration and description. Various modifications and changes can be made to these embodiments without departing from the spirit and scope of the application. It is intended that the scope of the application should not be limited by the particular representative embodiments described above.

Claims

1. A circular mapping catheter, characterized in that, The utility model relates to a kind of bending catheter, including: Handle (1); Pipe body (2), connect with the handle (1); Annular electrode assembly (3), connect with the end of the pipe body (2) away from the handle (1), the annular electrode assembly (3) has mapping electrode (33);And Bending assembly (4), the bending assembly (4) includes the first operation part (41) being arranged on handle (1) and the first pull wire (42) being connected with the first operation part (41), the first pull wire (42) extends along the axial direction of the pipe body (2), the end of the first pull wire (42) away from the first operation part (41) is connected annular electrode assembly (3); Wherein, the first operation part (41) can drive the first pull wire (42) moves along the axial direction of the pipe body (2), to make the first pull wire (42) pull annular electrode assembly (3) and deflect towards the first pull wire (42).

2. The ring-shaped mapping catheter of claim 1, wherein, The annular electrode assembly (3) has the connecting section (31) being coaxially arranged with the pipe body (2), and the outer edge of the connecting section (31) is connected with the first pull wire (42).

3. The ring-shaped mapping catheter of claim 2, wherein, The outer edge of the connecting section (31) is provided with two connection points, and the two connection points are oppositely arranged on both sides of the center of the connecting section (31). The first pull wire (42) is provided with two, and the two first pull wires (42) are respectively connected to the two connection points.

4. The ring-shaped mapping catheter of claim 3, wherein, When the first operation part (41) makes one of the first pull wires (42) in a tension state, the other first pull wire (42) is in a relaxed state.

5. The ring-shaped mapping catheter of claim 4, wherein, The first operation part (41) includes: The first knob (411) is rotatably arranged on the handle (1), and the inner surface of the first knob (411) is provided with an internal thread structure;And Two first sliders (412) are oppositely arranged in the first knob (411), and the outer circumferential surface of the two first sliders (412) is respectively provided with an external thread structure threadedly connected with the internal thread structure, and the two first sliders (412) are slidably arranged along the axial direction of the handle (1); Wherein, the two first pull wires (42) are respectively connected to the two first sliders (412).

6. The ring-shaped mapping catheter of claim 5, wherein, The handle (1) is provided with a first sliding rail structure (11) in the axial direction, and the two first sliders (412) are respectively in sliding cooperation with the first sliding rail structure (11).

7. The ring-shaped mapping catheter of claim 4, wherein, The first operation part (41) includes a second knob (413) rotatably arranged on the handle (1), and the second knob (413) is provided with two fixed points (4131), and the two fixed points (4131) are respectively connected to the two first pull wires (42).

8. The ring-shaped mapping catheter of claim 7, wherein, The fixed point (4131) is respectively provided with a winding portion (4132) and a avoiding portion (4133) on both sides in the circumferential direction, when one of the first pull wires (42) is wound on the winding portion (4132), the other first pull wire (42) is in the avoiding portion (4133).

9. The ring-shaped mapping catheter of claim 1, wherein, The side wall of the pipe body (2) is provided with a first sliding hole in the extension direction, and the first pull wire (42) is slidably arranged in the first sliding hole.

10. The ring-shaped mapping catheter of claim 1, wherein, The diameter of the annular electrode assembly (3) is adjustable. The annular mapping catheter also includes a diameter adjustment assembly (5). The diameter adjustment assembly (5) includes a second operating part (51) disposed on the handle (1) and a second pull wire (52) connected to the second operating part (51). The second pull wire (52) is disposed along the extension direction of the tube body (2) and the annular electrode assembly (3). One end of the second pull wire (52) away from the second operating part (51) is connected to the distal end of the annular electrode assembly (3) away from the tube body (2). The second operating part (51) can pull the distal end of the annular electrode assembly (3) through the second pull wire (52) to change the diameter of the annular electrode assembly (3).

11. The ring-shaped mapping catheter of claim 10, wherein, The handle (1) is provided with a second slide rail structure (12) along the axial direction. The second operating part (51) includes a second slider (511). The second slider (511) is slidably engaged with the second slide rail structure (12). The second pull wire (52) is connected to the second slider (511).

12. The ring-shaped mapping catheter of claim 11, wherein, There is a damping force between the second slider (511) and the second slide rail structure (12) for positioning the second slider (511).

13. The ring-shaped mapping catheter of claim 10, wherein, The tube body (2) and the annular electrode assembly (3) are provided with a second sliding hole along the extension direction on their sidewalls, and the second pull wire (52) is slidably disposed in the second sliding hole.

14. The ring-shaped mapping catheter of claim 1, wherein, The tube body (2) and the annular electrode assembly (3) are internally connected by an infusion channel (6). The tube body (2) is provided with a Luer connector (7) that communicates with the infusion channel (6) at one end away from the annular electrode assembly (3). The annular electrode assembly (3) is provided with an output hole that communicates with the infusion channel (6).

15. The ring-shaped mapping catheter of claim 1, wherein, The annular electrode assembly (3) also includes a tube (32), the calibration electrode (33) is sleeved on the outer periphery of the tube (32), a Remo connector (8) is provided at the handle (1), the Remo connector (8) is electrically connected to the calibration electrode (33) through a wire (9), the wire (9) is preset inside the tube body (2) and the annular electrode assembly (3).

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