CN219230100U - Pulse ablation catheter - Google Patents

Abstract

The application discloses a pulse ablation catheter, it belongs to the medical equipment field. A pulse ablation catheter comprising: a handle; the catheter is arranged on the handle; the pulse ablation catheter further comprises: the device comprises a covering sleeve, a fixing piece, a supporting piece, a fixing head, a plurality of electrode arms, a first electrode ring and a second electrode ring; the covering sleeve member is movably arranged on the catheter; the fixing piece is fixed on one end of the catheter far away from the handle; the support piece is arranged at one end of the fixing piece far away from the handle; the fixing head is arranged at one end of the supporting piece far away from the fixing piece; the electrode arm is arranged on the fixing piece; the first electrode is arranged on the electrode arm in a ring manner; the second electrode is arranged on the covering sleeve member in a ring mode. The pulse ablation catheter has the beneficial effects that the pulse ablation catheter with two ablation modes of local and range is provided.

Description

Pulse ablation catheter

Technical Field

The present application relates to the field of medical devices, and in particular, to a pulse ablation catheter.

Background

Atrial fibrillation (Atrial Fibrillation, abbreviated as AF, atrial fibrillation) is one of the most common cardiac arrhythmias in clinic, and clinical studies in multiple countries show that the total incidence of atrial fibrillation is about 2%, and in recent years, the incidence of atrial fibrillation is gradually increasing. Non-drug treatment of atrial fibrillation is a recent research hotspot, and for example, catheter ablation technology is used to electrically isolate pulmonary veins, so that recurrence of atrial fibrillation can be effectively prevented and sinus rhythm can be maintained.

Pulse ablation is different from other physical ablation such as radio frequency, refrigeration, microwaves, ultrasound and the like based on the principle of thermal ablation, microsecond pulses are released through a pulse ablation catheter, and pulse electric field energy forms irreversible micropores on cell membranes through instant discharge to cause apoptosis, so that the purpose of treatment is achieved, and damage to blood vessels, nerves and esophagus can be effectively avoided due to the non-thermal biological effect of the pulse ablation catheter, so that the pulse ablation catheter is widely applied. In the ablation procedure, an ablation catheter enters human tissue, an ablation assembly is provided at its distal end (i.e., the end of the ablation catheter remote from the operator), the ablation assembly reaches and abuts against the focal region, and pulses are released for treatment. Because different focus areas have different shapes, the shape of the ablation assembly is possibly not suitable for the shape of the focus areas, effective adhesion cannot be formed, the generated electric field is insufficient between electrodes due to poor adhesion, an operator needs to continuously adjust the adhesion angle to find a better adhesion position, the operation difficulty of operation is high, the operation time is long, and the operation risk is increased.

At present, in order to enable an ablation assembly to be effectively attached to a focus area, an electrode arm is generally designed to be in a deformable state, the ablation assembly is enabled to be effectively attached to the focus area for ablation through changing the shape of the electrode arm, but the common electrode arm is used for range-type ablation, when the electrode arm is attached to the focus area for ablation at a local position, the electrode arm cannot be attached well, and the ablation effect is reduced.

There is a need for a pulsed ablation catheter that can accommodate both range ablation and local ablation.

Disclosure of Invention

The content of the present application is intended to introduce concepts in a simplified form that are further described below in the detailed description. The section of this application is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

To address the technical problems noted in the background section above, some embodiments of the present application provide a pulse ablation catheter comprising: a handle; the catheter is arranged on the handle; the pulse ablation catheter further comprises: the device comprises a covering sleeve, a fixing piece, a supporting piece, a fixing head, a plurality of electrode arms, a first electrode ring and a second electrode ring; the covering sleeve member is movably arranged on the catheter; the fixing piece is fixed on one end of the catheter far away from the handle; the support piece is arranged at one end of the fixing piece far away from the handle; the fixing head is arranged at one end of the supporting piece far away from the fixing piece; the electrode arm is arranged on the fixing piece; the first electrode is arranged on the electrode arm in a ring manner; the second electrode is arranged on the covering sleeve member in a ring manner; the fixed head has conductivity, and when the fixed head is contacted with the covering sleeve, the fixed head and the second electrode ring can form a positive and negative loop; at least a portion of the electrode arms extend along the length of the support and are distributed circumferentially around the support; the electrode arm is used for connecting the fixing piece and the fixing head.

Further, the operating state of the electrode arm is switchable between a contracted state and an expanded state, at least a portion of the electrode arm being contracted inwardly when the electrode arm is in the contracted state; when the electrode arms are in the expanded state, at least a portion of the electrode arms expand outwardly.

Further, a fixing groove and a plurality of slots are formed in the fixing head; the fixed groove is positioned at the center of the fixed head; the slot surrounds the periphery of the fixed slot; the support piece is inserted into the fixing groove; the electrode arm is inserted into the slot.

Further, the fixing piece is provided with a perforation and a plurality of cavities; the perforation is positioned at the center of the fixing piece; the cavity is circumferentially located around the perforation; wherein the support passes through the perforation; one end of the electrode arm far away from the fixed head is fixed in the cavity.

Further, the end face of the fixing head far away from the fixing piece is connected with the side wall of the fixing head through an arc chamfer, so that damage to an atrium is reduced when the fixing head is abutted with the atrium.

Further, the covering sleeve is slidably disposed with respect to the mount.

Further, one surface of the fixing head, which is close to the covering sleeve, is an abutting surface; the projection of the end face of the end, close to the abutting surface, of the covering sleeve member, taking the abutting surface as a projection surface is at least partially overlapped with the abutting surface, so that the abutting surface abuts against the covering sleeve member.

Further, the projection of the fixing piece on the abutting surface is located in the projection of the covering sleeve piece on the abutting surface, so that the covering sleeve piece can be sleeved on the fixing piece.

Further, the pulse ablation catheter further comprises: a button, a knob; the button is arranged on the handle and used for driving the supporting rod; the knob is rotationally arranged on the handle and used for driving the covering sleeve member.

The beneficial effects of this application lie in: a pulsed ablation catheter having both local and local modes of ablation is provided.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application.

In addition, the same or similar reference numerals denote the same or similar elements throughout the drawings. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale.

In the drawings:

FIG. 1 is an overall schematic diagram according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a portion of an embodiment, mainly illustrating the electrode arm structure;

FIG. 3 is a schematic structural view of a portion of an embodiment, primarily showing the stationary head structure;

FIG. 4 is a schematic structural view of a portion of an embodiment, primarily illustrating the abutment surface configuration;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is a state diagram of the electrode arm as received within the covering sleeve;

fig. 7 is a schematic structural view of a part of the embodiment, mainly showing the structure of the fixing member.

Reference numerals:

100. a pulse ablation catheter; 101. a handle; 102. a conduit; 103. a button; 104. a knob; 105. a covering sleeve; 106. a fixing member; 107. a support; 108. a fixed head; 109. an electrode arm; 110. a first electrode ring; 111. a second electrode ring; 106a, a cavity; 106b, perforating; 108a, a fixed slot; 108b, a slot; 108c, abutment surface.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.

It should be noted that, for convenience of description, only the portions related to the present utility model are shown in the drawings. Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units.

It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise.

The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1-7, a pulsed ablation catheter 100 includes: handle 101, catheter 102, button 103, knob 104, covering sleeve 105, mount 106, support 107, mount head 108, electrode arm 109, first electrode ring 110, second electrode ring 111; the handle 101 is configured as a cylinder with an inner hollow shell; the catheter 102 is fixed on one end of the handle 101; a button 103 is provided on a side wall of the handle 101, the button 103 being connected to the support 107 for controlling the support 107 to slide on the fixing member 106 so that the fixing member 106 controls the expansion and contraction of the electrode arm 109; the knob 104 is rotatably arranged at one end of the handle 101 and is used for rotationally controlling the extension and retraction of the covering sleeve 105; the covering member 105 is slidably disposed on the catheter 102, and the covering member 105 is wrapped around the catheter 102.

The fixing piece 106 is fixed on one end of the catheter 102 far away from the handle 101, the covering sleeve 105 can cover the fixing piece 106, a plurality of cavities 106a and a perforation 106b are formed on one end of the fixing piece 106 far away from the handle 101, the perforation 106b is positioned at the center of the fixing piece 106, and a perforation 106b of the cavity 106a surrounds the perforation 106b as a circle center; the support 107 is slidably disposed in the through hole 106b, and the support 107 is configured in a round rod shape; the fixing head 108 is fixed on one end of the supporting piece 107 far away from the fixing piece 106, a fixing groove 108a and a plurality of slots 108b are formed in one surface of the fixing head 108 close to the supporting piece 107, and the fixing head 108 is made of conductive metal material and can be made of platinum iridium alloy with good conductivity; the fixing groove 108a is located at the center of the support 107, and the support 107 is fixed in the fixing groove 108 a; the slots 108b are annularly arranged around the fixed slot 108a with the fixed slot 108a as a rotation center; one end of the electrode arm 109 is fixed in the slot 108b, one slot 108b corresponds to one electrode arm 109, the other end of the electrode arm 109 is fixed in the cavity 106a, the inner supporting piece 107 of the electrode arm 109 is made of nickel-titanium alloy, and the plastic pipe of the outer wall is made of Pebax material.

The operating state of electrode arm 109 is switchable between a contracted state and an expanded state, with at least a portion of electrode arm 109 being contracted inwardly when electrode arm 109 is in the contracted state; when the electrode arm 109 is in the expanded state, at least a portion of the electrode arm 109 expands outwardly so that the electrode arm 109 may be opened to different sizes, thereby allowing the first electrode ring 110 on the electrode arm 109 to better abut the ostium of the pulmonary vein.

The first electrode ring 110 is sleeved on the electrode arm 109, and after the first electrode ring 110 is powered on, an electric signal in the heart can be obtained, so that abnormal potential in the heart can be measured; the second electrode ring 111 is sleeved on the covering sleeve 105, the conducting wire of the second electrode ring 111 is located inside the covering sleeve 105, when the covering sleeve 105 contacts the fixing head 108, the second electrode ring 111 and the fixing head 108 form positive and negative stages, so that the fixing head 108 contacts an abnormal potential part to ablate, and the first electrode ring 110 and the second electrode ring 111 of the second electrode ring 111 can adopt platinum iridium alloy with good conductivity.

When the pulse ablation catheter 100 is used, an operator stretches the catheter 102 into an atrium and a circumferential vein towards one end of the fixed head 108 when the electrode arm 109 is contracted in the covering sleeve 105, then the operator drives the covering sleeve 105 to move towards the handle 101 by rotating the knob 104 to expose all the electrode arms 109, and after the first electrode ring 110 and the second electrode ring 111 on the electrode arms 109 are powered on by the catheter 102, an electrical signal in the heart can be acquired, and abnormal potential in the heart can be measured.

The operator moves the support 107 towards the direction of the handle 101 through the button 103 on the control handle 101 to drive the electrode arm 109 to move, changes the form of the electrode arm 109, enables the electrode arm 109 to be opened into a solid structure from the original straight state, ablates the pulmonary vein orifice, enables the electrode arm 109 to be opened into different sizes according to the size of the pulmonary vein orifice, and enables the first electrode ring 110 on the electrode arm 109 to be better attached to the pulmonary vein orifice.

A signal element can be installed below the button 103, a driving member is installed on one end, close to the handle 101, of the supporting member 107, a micro motor can be adopted, the micro motor is electrically connected with the signal element, the signal element takes the action of pressing the button 103 as a starting signal, the signal element sends a signal to the driving member, and the driving member drives the supporting member to move.

When an electric signal with local abnormality is encountered, the support 107 is controlled by the button 103 to move towards the direction of the fixed head 108 to drive the electrode arm 109 to be in a straight line, and then the adjusting knob 104 is used for controlling the covering sleeve 105 to move towards the direction of the fixed head 108 until the covering sleeve 105 and the fixed head 108 are contacted with each other, so that the fixed head 108 and the second electrode ring 111 on the covering sleeve 105 form positive and negative electrodes, the fixed head 108 and the abnormal potential part are abutted and discharged, and ablation is performed.

A signal element may be mounted on the knob 104, and then a driving member is mounted on the end of the covering sleeve 105 far from the fixed head 108, the driving member is electrically connected with the signal, the signal member uses the rotation of the knob as a starting signal, after the signal is sent to the driving member, the driving member drives the covering sleeve to move, so as to cover the electrode arm 109.

By the arrangement of the electrode arm 109 and the fixed head 108, the pulse ablation catheter 100 has two ablation modes, one is through the range of ablation on the electrode arm 109, and the other is through the fixed head 108 to perform local ablation.

The end surface of the fixation head 108 far from the fixation element 106 is connected with the side wall of the fixation head 108 through an arc chamfer, so that the damage to the atrium is reduced when the fixation head 108 is abutted with the atrium.

The surface of the fixing head 108 close to the covering sleeve 105 is an abutting surface 108c; the projection of the end surface of the cover sleeve 105 near the end of the abutment surface 108c with the abutment surface 108c as a projection surface is at least partially overlapped with the abutment surface 108c so that the abutment surface 108c abuts against the cover sleeve 105.

The projection of the mount 106 on the abutment surface 108c is located within the projection of the covering sleeve 105 on the abutment surface 108c such that the covering sleeve 105 can nest with the mount 106.

The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the utility model in the embodiments of the present disclosure is not limited to the specific combination of the above technical features, but encompasses other technical features formed by any combination of the above technical features or their equivalents without departing from the spirit of the utility model. Such as the above-described features, are mutually substituted with (but not limited to) the features having similar functions disclosed in the embodiments of the present disclosure.

Claims (9)

1. A pulse ablation catheter, comprising:

a handle;

the catheter is arranged on the handle;

the method is characterized in that:

the pulse ablation catheter further comprises:

the device comprises a covering sleeve, a fixing piece, a supporting piece, a fixing head, a plurality of electrode arms, a first electrode ring and a second electrode ring; the covering sleeve member is movably arranged on the catheter; the fixing piece is fixed on one end of the catheter far away from the handle; the support piece is arranged at one end of the fixing piece far away from the handle; the fixing head is arranged at one end of the supporting piece far away from the fixing piece; the electrode arm is arranged on the fixing piece; the first electrode is arranged on the electrode arm in a surrounding manner; the second electrode is arranged on the covering sleeve in a surrounding manner;

the fixed head has conductivity, and when the fixed head is in contact with the covering sleeve, the fixed head and the second electrode ring can form a positive and negative electrode loop; at least a portion of the electrode arms extend along the length of the support and are distributed circumferentially around the support; the electrode arm is used for connecting the fixing piece and the fixing head.

2. The pulse ablation catheter of claim 1, wherein:

the working state of the electrode arm is capable of being switched between a contracted state and an expanded state, and when the electrode arm is in the contracted state, at least a part of the electrode arm is contracted inwards; at least a portion of the electrode arms expand outwardly when the electrode arms are in the expanded state.

3. The pulse ablation catheter of claim 1, wherein:

the fixing head is provided with a fixing groove and a plurality of slots; the fixing groove is positioned at the center of the fixing head; the slot surrounds the periphery of the fixed slot; the support piece is inserted into the fixing groove; the electrode arm is inserted into the slot.

4. The pulse ablation catheter of claim 3, wherein:

the fixing piece is provided with a perforation and a plurality of cavities; the through hole is positioned at the center of the fixing piece; the cavity is circumferentially located around the perforation;

wherein the support passes through the perforations; one end of the electrode arm far away from the fixing head is fixed in the cavity.

5. The pulse ablation catheter of claim 1, wherein:

the end face, far away from the fixing piece, of the fixing head is connected with the side wall of the fixing head through an arc chamfer, so that damage to an atrium is reduced when the fixing head is abutted to the atrium.

6. The pulse ablation catheter of claim 1, wherein:

the cover sleeve is slidably disposed relative to the mount.

7. The pulse ablation catheter of claim 1, wherein:

one surface of the fixed head, which is close to the covering sleeve, is an abutting surface; the end face, close to one end of the abutting surface, of the covering sleeve at least partially overlaps with the abutting surface by taking the abutting surface as a projection surface, so that the abutting surface abuts against the covering sleeve.

8. The pulse ablation catheter of claim 7, wherein:

the projection of the fixing piece on the abutting surface is positioned in the projection of the covering sleeve piece on the abutting surface, so that the covering sleeve piece can be sleeved on the fixing piece.

9. The pulse ablation catheter of claim 1, wherein:

the pulse ablation catheter further comprises: a button, a knob; the button is arranged on the handle and used for driving the supporting piece; the knob is rotatably arranged on the handle and used for driving the covering sleeve member.

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