CN111772773B

CN111772773B - Ablation catheter for pulmonary artery stimulation

Info

Publication number: CN111772773B
Application number: CN202010578625.1A
Authority: CN
Inventors: 张智伟; 梁东坡; 肖建华
Original assignee: Guangzhou Qijun Biotechnology Co ltd
Current assignee: Guangzhou Qijun Biotechnology Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-11-30
Anticipated expiration: 2040-06-23
Also published as: CN111772773A

Abstract

The invention relates to a circumferential pulmonary artery stimulation ablation catheter, which comprises: the tube body is movably provided with a driving handle; the net basket is movably arranged on the tube body and connected with the driving handle, and the net basket has a contraction state for avoiding the pulmonary artery mouth and an expansion state for clinging to the pulmonary artery mouth; the ablation treatment unit is arranged on the tube body and connected with the basket; and the blood pressure monitoring unit is arranged on the tube body. After the part to be ablated is positioned, the ablation treatment unit is started, and the stimulation ablation treatment can be completed; and then monitoring the blood pressure change of the part to be ablated again, and further judging whether ablation works or not until the whole pulmonary artery ablation treatment operation is completed. Compared with the traditional ablation catheter, the annular pulmonary artery stimulation ablation catheter can accurately position the required ablation part through blood pressure monitoring, and greatly improves the annular pulmonary artery ablation treatment effect and efficiency.

Description

Ablation catheter for pulmonary artery stimulation

Technical Field

The invention relates to the technical field of medical instruments, in particular to a pulmonary artery surrounding stimulation ablation catheter.

Background

Pulmonary Hypertension (PH) is a malignant pulmonary vascular disease whose main pathophysiological features are persistent contraction and remodeling of pulmonary vessels, resulting in progressive increase in pulmonary vascular resistance, combined with varying degrees of right heart failure. PH refers to the increase in pulmonary artery pressure due to a variety of causes, including pre-capillary PH, post-capillary PH, and mixed PH (increased pulmonary artery and pulmonary vein pressure). For the last 10 years, three major drugs aiming at the classical pathway of PH-targeted therapy, endothelin receptor antagonists, phosphodiesterase 5 inhibitors, prostacyclin drugs, have been on the market in succession, and combination therapy strategies have also been approved by clinicians. However, these therapeutic drugs have limited effects and large side effects, in which expensive drug costs make most families unworkable, and thus most drugs have not been widely used for clinical treatment.

In view of the above, some ablation catheters for pulmonary artery high pressure therapy are gradually appeared on the market, and the ablation catheters generally comprise a control handle, a tube body and an annular ring, and the radian of the annular ring is adjusted by the control handle and current is input to achieve the purpose of ablation therapy. However, the treatment of the ablation catheter has great carelessness and trial, the treatment speed is slow, and the annular ring is poor in fit degree with the pulmonary artery blood vessel, so that the ablation treatment effect is influenced.

Disclosure of Invention

Therefore, a circumferential pulmonary artery stimulation ablation catheter is needed to be provided, and the problems of low treatment speed and poor treatment effect in the prior art are solved.

An annulus pulmonary artery stimulation ablation catheter, comprising:

the pipe body is movably provided with a driving handle;

the net basket is movably arranged on the tube body and connected with the driving handle, and the net basket has a contraction state for avoiding a pulmonary artery opening and an expansion state for clinging to the pulmonary artery opening;

the ablation treatment unit is arranged on the tube body and connected with the basket; and

the blood pressure monitoring unit is arranged on the tube body.

The circumferential pulmonary artery stimulation ablation catheter is applied to the treatment process of malignant pulmonary vascular diseases such as pulmonary hypertension, and can accurately position lesion points and cure the lesion points in an ablation treatment mode. Particularly, during the use, at first the operation drive handle moves towards first direction on the pipe shaft to order about the basket and warp to the shrink state, the position of pulmonary artery mouth can be alternate to with the help of the good godet of tip pre-installation sheath pipe of pipe shaft cooperation, and the godet then can play the location in inserting pulmonary artery blood vessel deeply and hang and lean on the effect, and the basket is in pulmonary artery mouth position just this moment, and because the basket is in the removal that the shrink state can be better dodges pulmonary artery mouth and blocks. And then, the driving handle is operated again to move towards the second direction on the tube body, the driving handle can drive the basket to change from the contraction state to the expansion state, and the size of the basket is further adjusted, so that the basket can be tightly attached to the inner wall of the pulmonary artery mouth, and the subsequent blood pressure monitoring and ablation treatment effect can be ensured. And then, the blood pressure monitoring unit is connected with external monitoring equipment, and the blood pressure value of each part on the inner wall of the pulmonary artery mouth is monitored and changed by the blood pressure monitoring unit, so that the part needing to be ablated can be accurately judged. After the part to be ablated is positioned, the ablation treatment unit is started, and the stimulation ablation treatment can be completed; and then monitoring the blood pressure change of the part to be ablated again, and further judging whether ablation works or not until the whole pulmonary artery ablation treatment operation is completed. Compared with the traditional ablation catheter, the annular pulmonary artery stimulation ablation catheter can accurately position the required ablation part through blood pressure monitoring, and greatly improves the annular pulmonary artery ablation treatment effect and efficiency.

The technical solution of the present application is further described below:

in one embodiment, the basket includes a fixed joint fixedly mounted on the tube body, a movable joint slidably disposed on the tube body, and a telescopic bracket connected between the fixed joint and the movable joint, the telescopic bracket has the contracted state and the expanded state, the tube body is opened with a first tube cavity extending along the axial direction, an actuating body is disposed in the first tube cavity, one end of the actuating body is connected with the movable joint, and the other end of the actuating body is connected with the driving handle.

In one embodiment, the telescopic bracket comprises an inner bracket and an outer bracket, the outer bracket is sleeved outside the inner bracket, and the inner bracket and the outer bracket can be synchronously contracted or expanded.

In one embodiment, the inner layer support comprises a plurality of support units distributed along the circumferential direction of the pipe body, the support units comprise a first support arm connected with the fixed joint, a second support arm connected with the movable joint and an expansion and contraction ring connected between the first support arm and the second support arm, and any two adjacent expansion and contraction rings are connected.

In one embodiment, the outer layer support comprises a plurality of third support arms distributed along the circumferential direction of the pipe body, any two adjacent third support arms are arranged at intervals, and the third support arms extend along the axial direction of the pipe body.

In one embodiment, the basket further comprises a plurality of basket arms, the basket arms are sleeved on the third supporting arm in a one-to-one correspondence manner, the ablation treatment unit comprises at least two first ablation assemblies and at least two second ablation assemblies, the first ablation assemblies and the second ablation assemblies are respectively installed in the inner cavities of the basket arms in a one-to-one correspondence manner, and the first ablation assemblies and the second ablation assemblies are alternately distributed in an annular direction one by one; wherein the first ablation assembly or the second ablation assembly is provided with a temperature control function.

In one embodiment, the first ablation assembly has a temperature control function, and the first ablation assembly comprises a first ablation ring arranged on the basket arm, and a first lead and a temperature control wire which are respectively electrically connected with the first ablation ring; the second ablation assembly comprises a second ablation ring arranged on the basket arm and a second lead electrically connected with the second ablation ring, and the first lead, the temperature control wire and the second lead are all arranged in the first cavity in a penetrating mode.

In one embodiment, the circum-pulmonary artery stimulation ablation catheter further comprises a connecting seat, one end of the connecting seat is connected with the first lead, the temperature control wire and the second lead, and the other end of the connecting seat is used for being connected with an external control device.

In one embodiment, the ablation catheter for stimulating the pulmonary artery further comprises a protective tube, the protective tube is inserted into the first tube cavity, and the application body is arranged in the protective tube in a penetrating mode.

In one embodiment, the tube body is further provided with a second tube cavity extending along the axial direction and arranged side by side with the first tube cavity, the blood pressure monitoring unit comprises a blood pressure monitoring piece arranged in the second tube cavity in a penetrating mode and a conveying connector connected with the blood pressure monitoring piece, and the conveying connector is further used for being connected with external monitoring equipment.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a circumferential pulmonary artery stimulation ablation catheter according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of the structure of the basket of FIG. 1;

FIG. 4 is a schematic structural view of the outer layer support of FIG. 3;

FIG. 5 is a schematic structural view of the inner stent of FIG. 3;

FIG. 6 is a schematic structural view of a first ablation assembly in accordance with an embodiment of the invention;

fig. 7 is a schematic structural view of a second ablation assembly in accordance with an embodiment of the invention.

Description of reference numerals:

10. a tube body; 11. a first lumen; 12. a second lumen; 20. a drive handle; 30. a basket; 31. fixing the joint; 32. a movable joint; 33. a telescopic bracket; 331. an inner layer support; 331a, a first support arm; 331b, a second support arm; 331c, collapsible ring; 332. an outer layer bracket; 332a, a third support arm; 34. a basket arm; 40. an ablation therapy unit; 50. a blood pressure monitoring unit; 60. an application body; 70. a first ablation assembly; 71. a first ablating loop; 72. a first conductive line; 73. controlling the temperature; 80. a second ablation assembly; 81. a second ablating loop; 82. a second conductive line; 90. a connecting seat; 100. protecting the pipe; 200. a delivery sub; 300. a thread guide head.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Pulmonary Hypertension (PH), a type of malignant pulmonary vascular disease, not only results in a progressive increase in pulmonary vascular resistance, but also has a concomitant variable degree of right heart failure. The number of people suffering from diseases has increased year by year in recent years, and the life health and safety of people are seriously threatened.

In the related field, a great number of scientific researchers have been involved in overcoming the difficulties and solving the problems. In recent years, experimental data prove that pulmonary hypertension is related to excitability increase of sympathetic nerves in pulmonary artery and abnormal activity of baroreceptors, so that the pulmonary artery pressure can be remarkably reduced by blocking the sympathetic nerves in the pulmonary artery or permanently destroying the structure and the function of the baroreceptors, and the pulmonary hypertension becomes a breakthrough medical technology for treating the pulmonary hypertension. However, there is no medical apparatus applied to this technology, and a catheter that can closely contact the wall of the pulmonary artery blood vessel and map and ablate the pulmonary artery sympathetic nerve is needed to treat the pulmonary hypertension by removing the pulmonary artery sympathetic nerve.

As shown in fig. 1, a circumferential pulmonary artery stimulation ablation catheter is shown for an embodiment of the present application, the circumferential pulmonary artery stimulation ablation catheter includes: a guide wire head 300, a tube body 10, a basket 30, an ablation treatment unit 40 and a blood pressure monitoring unit 50. The tube body 10 is a bearing main body and is used for installing and fixing the guide wire head 300, the basket 30, the ablation treatment unit 40 and the blood pressure monitoring unit 50. To facilitate puncturing of the pulmonary artery vessel, the body 10 is preferably an elongated circular tube; further, to avoid pollution and prolong the service life of the tube body 10, the tube body 10 is preferably made of medical stainless steel, titanium alloy steel and other materials.

The guidewire head 300 is mounted to one of the tube ends of the shaft 10 and is the direct actuation component for performing the puncture of the vessel wall. For treatment, the guidewire 300 needs to be engaged with the sheath to penetrate deep inside the pulmonary artery vessel. Specifically, the godet 300 includes a core wire and a spring. The core wire is a section of slender stainless steel wire, and one end of the core wire is welded or assembled and fixed with the pipe body 10 in other modes. The core wire is sharp and slender, so that the puncture of the wall of the pulmonary artery blood vessel is facilitated. The spring is sleeved outside the core wire and is welded and fixed with the pipe body 10. The spring can play the guard action to the core silk of piercing in-process, prevents that the core silk from receiving outside extrusion force too big and taking place bending deformation and even break. And by means of the structural characteristics of the spring, the guide wire head 300 can be firmly fixed in the pulmonary artery blood vessel, and the whole ablation catheter can be hung and positioned.

A driving handle 20 is movably arranged on the tube body 10; the basket 30 is movably arranged on the tube body 10 and connected with the driving handle 20, and the basket 30 has a contraction state for avoiding the pulmonary artery mouth and an expansion state for clinging to the pulmonary artery mouth; the ablation treatment unit 40 is arranged on the tube body 10 and connected with the basket 30; the blood pressure monitoring unit 50 is disposed on the tube body 10.

In summary, the implementation of the technical solution of the present embodiment has the following beneficial effects: the circumferential pulmonary artery stimulation ablation catheter is applied to the treatment process of malignant pulmonary vascular diseases such as pulmonary hypertension, and can accurately position lesion points and cure the lesion points in an ablation treatment mode. Specifically, when the device is used, the driving handle 20 is firstly operated to move towards the first direction on the tube body 10 so as to drive the basket 30 to deform into a contraction state, at the moment, the tube body 10 can be inserted into the position of a pulmonary artery opening by matching a wire guide head with a sheath tube, the wire guide head is pre-installed at the end part of the tube body, the wire guide head can be deeply inserted into a pulmonary artery blood vessel to play a role in positioning and hanging, at the moment, the basket 30 is just positioned at the position of the pulmonary artery opening, and the basket 30 is in the contraction state and can better avoid the movement blockage of the pulmonary artery opening. Then, the driving handle 20 is operated again to move towards the second direction on the tube body 10, the driving handle can drive the basket 30 to change from the contraction state to the expansion state, and the size of the basket 30 is further adjusted, so that the basket 30 can be tightly attached to the inner wall of the pulmonary artery mouth, and the subsequent blood pressure monitoring and ablation treatment effect can be ensured. Then, the blood pressure monitoring unit 50 is connected with an external monitoring device, and the blood pressure value of each part on the inner wall of the pulmonary artery mouth is monitored and changed through the blood pressure monitoring unit 50, so that the part needing to be ablated can be accurately judged. After the part to be ablated is positioned, the ablation treatment unit 40 is started, and the stimulation ablation treatment can be completed; and then monitoring the blood pressure change of the part to be ablated again, and further judging whether ablation works or not until the whole pulmonary artery ablation treatment operation is completed. Compared with the traditional ablation catheter, the annular pulmonary artery stimulation ablation catheter can accurately position the required ablation part through blood pressure monitoring, and greatly improves the annular pulmonary artery ablation treatment effect and efficiency.

With continued reference to fig. 2 and 3, in some embodiments, the basket 30 includes a fixed joint 31 fixedly mounted on the pipe 10, a movable joint 32 slidably disposed on the pipe 10, and a telescopic bracket 33 connected between the fixed joint 31 and the movable joint 32, where the telescopic bracket 33 has the retracted state and the expanded state. It can be understood that when the telescopic bracket 33 is in the contracted state, the telescopic bracket 33 can be ensured to be in a smaller volume and be more easily inserted into the pulmonary artery ostium. And the telescopic bracket 33 is deformed into an expanded state by operation, so that the pulmonary artery mouth can be expanded, and blood pressure monitoring and ablation treatment can be conveniently carried out. In this embodiment, the tube body 10 is designed with a double lumen. That is, the tube body 10 is opened with a first lumen 11 extending in the axial direction, an actuating body 60 is disposed in the first lumen 11, one end of the actuating body 60 is connected to the movable joint 32, and the other end of the actuating body 60 is connected to the driving handle 20.

In this way, the fixed joint 31 ensures that the telescopic bracket 33 and the movable joint 32 are fixed to the pipe body 10, and is stable and reliable when the telescopic bracket 33 is deformed. When the driving handle 20 is operated to slide away from the fixed joint 31, the driving handle 20 drives the actuating body 60 to pull the movable joint 32 to move away from the fixed joint 31 (i.e. to move along the first direction), so as to drive the telescopic bracket 33 to stretch along the axial direction and deform into a contracted state, thereby facilitating the puncturing operation. On the contrary, when the puncture is completed, the driving handle 20 is operated again to slide close to the fixed joint 31, and at this time, the driving handle 20 can drive the actuating body 60 to push the movable joint 32 to close to the fixed joint 31 (i.e. the movement along the second direction), and the movable joint 32 pushes the telescopic bracket 33 to converge towards the center and can be converted into an expanded state, and at this time, the telescopic bracket 33 can cling to the inner wall of the pulmonary artery ostium to ensure the reliable implementation of the subsequent treatment operation. By adopting the scheme that the driving handle 20 is matched with the actuating body 60 to drive the basket 30 to deform and switch, the structure is simple, the operation is convenient and labor-saving, and the efficient operation of the ablation treatment operation is ensured.

Alternatively, the actuating body 60 may be a pull wire, a rod, or the like having a certain strength and hardness.

With reference to fig. 1 and fig. 2, in still another embodiment, the tube body 10 further defines a second lumen 12 extending along the axial direction and arranged side by side with the first lumen 11, the blood pressure monitoring unit 50 includes a blood pressure monitoring element inserted into the second lumen 12, and a delivery connector 200 connected to the blood pressure monitoring element, and the delivery connector 200 is further used for connecting to an external monitoring device. Therefore, blood pressure monitoring can be carried out on each part of the pulmonary artery mouth, and the part needing to be ablated is accurately detected and found so as to facilitate effective treatment. Alternatively, the blood pressure monitoring member may be, but is not limited to, a blood pressure detection sensor and its leads, medication or other devices.

With reference to fig. 3 to fig. 5, on the basis of the above embodiment, further, the telescopic bracket 33 includes an inner bracket 331 and an outer bracket 332, the outer bracket 332 is sleeved outside the inner bracket 331, and the inner bracket 331 and the outer bracket 332 can contract or expand synchronously. By adopting the double-layer support structure in which the inner support 331 and the outer support 332 are nested, the self structural strength of the telescopic support 33, particularly the support strength in an expanded state, can be remarkably improved, and the collapse caused by the contraction pressure of the pulmonary artery mouth can be avoided, so that the normal treatment is not influenced.

Specifically, in some embodiments, the inner layer support 331 includes a plurality of support units distributed along the circumferential direction of the pipe body 10, the support units include a first support arm 331a connected to the fixed joint 31, a second support arm 331b connected to the movable joint 32, and an expansion and contraction ring 331c connected between the first support arm 331a and the second support arm 331b, and any two adjacent expansion and contraction rings 331c are connected. Specifically, the first support arm 331a is welded and fixed to the fixed joint 31, the second support arm 331b is welded and fixed to the movable joint 32, and the first support arm 331a and the second support arm 331b are welded and fixed to the expansion ring 331c, so that the structural strength of the stent unit can be ensured. The first support arm 331a, the second support arm 331b, and the collapsible ring 331c are supported by a metal material having excellent elasticity. When the tube body is in the contracted state, the first support arm 331a and the second support arm 331b draw the collapsible ring 331c toward both ends in the axial direction and bring them close to each other in the direction of the tube body 10. When the tube body is in the expanded state, the first support arm 331a and the second support arm respectively push and push the expansion ring 331c from two axial directions toward opposite central directions, and the expansion ring 331c expands outward in a direction away from the tube body 10 to expand and cling to the pulmonary artery ostium.

Alternatively, the inner stent 331 and the outer stent 332 are each a lattice cage-like structure formed by cutting (e.g., laser cutting). The preparation method is simple and the integrity is good.

Further, in still other embodiments, the outer layer support 332 includes a plurality of third supporting arms 332a distributed along the circumferential direction of the pipe body 10, any two adjacent third supporting arms 332a are arranged at intervals, and the third supporting arms 332a extend along the axial direction of the pipe body 10. For example, the third support arm 332a may be parallel or approximately parallel to the axis of the shaft 10. The approximate parallelism is a measure to take into account machining errors and assembly errors of the third support arm 332 a. The third support arm 332a is a thin rod made of metal having an arc shape and excellent elastic ability. When in the contracted state, the third support arm 332a is close to the tube body 10, and the bending radian is smaller; in the expanded configuration, the middle of the third support arm 332a bulges outward (i.e., the curvature is increased by the relative compression of the movable joint 32 and the fixed joint 31) to achieve the effect of tightly contacting the ostium of the pulmonary artery. In addition, in the process of inserting into the pulmonary artery mouth, the third supporting arm 332a is slender, so that a certain cutting effect can be achieved, and the net basket 30 is ensured to be inserted into the pulmonary artery mouth more easily.

With reference to fig. 3, in addition, on the basis of any of the above embodiments, the basket 30 further includes a plurality of basket arms 34, and the basket arms 34 are correspondingly sleeved on the third supporting arms 332a, i.e. the basket arms 34 are also distributed along the circumferential direction of the pipe body 10. Referring to fig. 6 and 7, the ablation treatment unit 40 includes at least two first ablation assemblies 70 and at least two second ablation assemblies 80, the first ablation assemblies 70 and the second ablation assemblies 80 are respectively installed in the inner cavities of the basket arms 34 in a one-to-one correspondence manner, and the first ablation assemblies 70 and the second ablation assemblies 80 are alternately distributed in a circumferential direction; wherein the first ablation assembly 70 or the second ablation assembly 80 is temperature controlled. Therefore, each adjacent first ablation assembly 70 and one second ablation assembly 80 can form a group of ablation units, and after the group of ablation units is electrified, the group of ablation units can perform electrical discharge stimulation on the part to be ablated so as to perform temperature-controlled bipolar ablation treatment, thereby enhancing the treatment effect and efficiency.

It should be noted that the number of the third support arms 332a is equal to the number of the basket arms 34 and is increased by an even number, and both of them include at least 4. Therefore, the structural strength can be ensured, the number of the discharge ablation treatment point positions is increased, and the treatment effect and efficiency are improved.

With continued reference to fig. 6 and 7, in some embodiments, the first ablation element 70 is temperature controlled, while the second ablation element 80 is not temperature controlled. The first ablation assembly 70 comprises a first ablation ring 71 arranged on the basket arm 34, and a first lead 72 and a temperature control wire 73 which are respectively and electrically connected with the first ablation ring 71; the second ablation assembly 80 includes a second ablation ring 81 disposed on the basket arm 34, and a second guide wire 82 electrically connected to the second ablation ring 81, and the first guide wire 72, the temperature control wire 73, and the second guide wire 82 are all disposed in the first lumen 11. In this way, the first wire 72 can supply power to the first ablating loop 71 after being powered on, and the second wire 82 can supply power to the second ablating loop 81 after being powered on, so that the first ablating loop 71 and the second ablating loop 81 can perform discharge stimulation treatment on the pulmonary artery ostium to be ablated. The temperature control wire 73 can monitor the working temperature of the first ablating loop 71 synchronously, and feed data back to the external control equipment, so that the temperature control effect of the first ablating loop 71 is achieved through the external control equipment. At this time, the first ablating loop 71 and the second ablating loop 81 can perform temperature-controlled bipolar ablation, thereby improving the treatment effect. And because the first ablating ring 71 and the second ablating ring 81 are arranged in a plurality of groups along the circumferential direction, the annular ablation can be carried out, and the ablation treatment efficiency is improved.

Specifically, the first ablating loop 71 and the second ablating loop 81 are made of a metal material with good electrical conductivity and electrical discharge capability, such as but not limited to platinum and iridium.

On the basis of the above embodiment, further, the circumferential pulmonary artery stimulation ablation catheter further includes a connection seat 90, one end of the connection seat 90 is connected to the first lead 72, the temperature control wire 73 and the second lead 82, and the other end of the connection seat 90 is used for being connected to an external control device. The connecting base 90 is connected with an external control device, electric energy can be introduced into the first lead 72 and the second lead 82 to ensure normal discharge treatment of the first ablating loop 71 and the second ablating loop 81, and meanwhile, the temperature control wire 73 can feed temperature monitoring data back to the external control device to achieve the purpose of temperature control.

With continued reference to fig. 2, on the basis of any of the above embodiments, preferably, the actuating body 60 is an elongated pull wire, the circumferential pulmonary artery stimulation ablation catheter further includes a protective tube 100, the protective tube 100 is inserted into the first lumen 11, and the actuating body 60 is inserted into the protective tube 100. This ensures that the protective tube 100 separates the actuating body 60 from the first wire 72 and the like when the actuating body 60 is pulled and moved by the driving handle 20, thereby preventing the first wire 72 and the like from being scratched when the actuating body 60 is moved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An annulo pulmonary artery stimulation ablation catheter, comprising:

the pipe body is movably provided with a driving handle;

the blood pressure monitoring unit is arranged on the tube body; the basket comprises a fixed joint fixedly mounted on a tube body, a movable joint arranged on the tube body in a sliding mode and a telescopic support connected between the fixed joint and the movable joint, the telescopic support has the contraction state and the expansion state, the tube body is provided with a first tube cavity extending along the axial direction, a moving body is arranged in the first tube cavity, one end of the moving body is connected with the movable joint, and the other end of the moving body is connected with the driving handle; the telescopic bracket comprises an inner bracket and an outer bracket, the outer bracket is sleeved outside the inner bracket, and the inner bracket and the outer bracket can be synchronously contracted or expanded; the inner layer support comprises a plurality of support units distributed along the circumferential direction of the pipe body, each support unit comprises a first support arm connected with the fixed joint, a second support arm connected with the movable joint and an expansion and contraction ring connected between the first support arm and the second support arm, and any two adjacent expansion and contraction rings are connected; the outer support comprises a plurality of third support arms distributed along the circumferential direction of the pipe body, any two of the third support arms are arranged at intervals, and the third support arms are arranged along the axial extension of the pipe body.

2. The catheter of claim 1, wherein the basket further comprises a plurality of basket arms, the basket arms being nested one-to-one on the third support arm.

3. The ablation catheter for stimulating the pulmonary artery according to claim 2, wherein the ablation treatment unit comprises at least two first ablation assemblies and at least two second ablation assemblies, the first ablation assemblies and the second ablation assemblies are respectively installed in the inner cavity of the basket arm in a one-to-one correspondence mode, and the first ablation assemblies and the second ablation assemblies are alternately distributed in the annular direction one by one.

4. The ablation catheter of claim 3, wherein the first ablation assembly or the second ablation assembly is temperature controlled.

5. The catheter of claim 3, wherein the first ablation assembly has a temperature control function, and the first ablation assembly comprises a first ablation ring disposed on the basket arm, and a first lead and a temperature control wire electrically connected to the first ablation ring, respectively.

6. The ablation catheter for stimulating the pulmonary artery according to claim 5, wherein the second ablation assembly comprises a second ablation ring disposed on the basket arm, and a second lead electrically connected to the second ablation ring, and the first lead, the temperature control wire and the second lead are all disposed in the first lumen.

7. The ablation catheter for pulmonary artery stimulation according to claim 6, further comprising a connecting seat, wherein one end of the connecting seat is connected to the first conducting wire, the temperature control wire and the second conducting wire, and the other end of the connecting seat is used for connecting with an external control device.

8. The ablation catheter for circum-pulmonary artery stimulation according to claim 7, further comprising a protection tube inserted into the first lumen, wherein the application body is inserted into the protection tube.

9. The catheter for stimulating and ablating pulmonary artery according to claim 1, wherein the catheter body further defines a second lumen extending along the axial direction and arranged side by side with the first lumen, the blood pressure monitoring unit comprises a blood pressure monitoring member inserted into the second lumen, and a delivery connector connected to the blood pressure monitoring member, and the delivery connector is further used for connecting to an external monitoring device.