An ablation catheter

Abstract

The application provides an ablation catheter, which comprises a tube body, a handle, a bending adjustment section, a tube head, an energy transmission channel and an ultrasonic detection device. The ultrasonic detection device is arranged at the intersection of the end surface of the tube head and the side surface of the tube head. The ablation catheter has the advantages of large detection range, convenient operation and compact structure, and can detect the atrial wall thickness and ablation depth of the area in front of the catheter end surface and above the catheter side surface.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to an ablation catheter. More specifically, the present invention relates to an ablation catheter capable of detecting atrial wall thickness and ablation depth in real time. Background Art

[0002] As one of the most common arrhythmias, the incidence of atrial fibrillation increases with age. As an effective treatment, demand for radiofrequency catheter ablation has increased significantly in recent years. The principle of radiofrequency catheter ablation involves inserting a catheter into the affected area of ​​the patient's body through a vascular puncture under the monitoring of angiography equipment. The catheter then detects and locates the abnormal structure causing the tachycardia. Energy is then released locally at that location, generating high temperatures within a small area. This thermal energy evaporates moisture from the local tissue, causing desiccation and necrosis, thereby achieving the therapeutic goal.

[0003] Currently, ablation catheters on the market are typically equipped with general functions such as temperature control, pressure control, and power control. However, due to individual differences, each patient's atrial structure is different, so ablation catheters must provide targeted radiofrequency ablation treatment based on each patient's atrial structure. In order to enable ablation catheters to provide appropriate radiofrequency ablation treatment for different atrial structures, accurate acquisition of atrial wall thickness data is particularly important.

[0004] In addition, existing radiofrequency ablation catheters are difficult to accurately detect endocardial damage (i.e., ablation depth) at the ablation site during ablation in real time, which may result in excessive or insufficient ablation, making it difficult to ensure the safety and success rate of ablation.

[0005] Therefore, it is necessary to develop a new type of atrial fibrillation ablation catheter to solve the above problems. Summary of the Invention

[0006] Although existing radiofrequency ablation catheters have functions such as temperature control, pressure control, and power control, they are unable to understand the real-time situation of the atrial myocardium at the ablation site and the changes in the endocardial tissue during the ablation process, which increases the risk of intraoperative complications and postoperative arrhythmia recurrence.

[0007] As a high-quality detection tool, ultrasound presents different imaging characteristics in tissues of different properties and has great potential for detecting tissue structures. Intracardiac ultrasound (ICE) is a common intracardiac detection method in the existing technology. However, intracardiac ultrasound (ICE) is usually only used to explore the overall structure of the heart cavity. When used to monitor changes in myocardial structure, the effect is often poor and it is impossible to achieve real-time detection of atrial wall thickness and ablation depth. In addition, the design of the mechanical probe used in intracardiac ultrasound (ICE) is not suitable for atrial fibrillation surgery. The specifications are too large and face difficulties when combined with ablation catheters.

[0008] To this end, the present invention provides an ablation catheter, comprising:

[0009] The tube body is in the form of a hollow tube and has two ends, a proximal end and a distal end;

[0010] A handle having a proximal end and a distal end, wherein the distal end of the handle is connected to the proximal end of the tube body;

[0011] a curvature adjustment section having a proximal end and a distal end, wherein the proximal end of the curvature adjustment section is connected to the distal end of the tube body, and the curvature of the curvature adjustment section can be adjusted along its axial direction;

[0012] The tube head is in the form of a hollow tube, having two ends, a proximal end and a distal end, wherein the distal end of the tube head is closed, and the proximal end of the tube head is connected to the distal end of the curvature adjustment section;

[0013] an energy transmission pathway, the energy transmission pathway being disposed within the tube head, the tube body, the handle, and the curvature adjustment section, and being connected to the tube head at one end so as to be capable of transmitting energy to the tube head, and being connected to an energy input interface disposed on the handle at the other end; and

[0014] An ultrasonic detection device comprising an ultrasonic detection unit and an ultrasonic detection unit wire, wherein the ultrasonic detection unit is capable of emitting and detecting high-frequency sound beams, the ultrasonic detection unit wire being connected to the ultrasonic detection unit at one end and to an ultrasonic connection socket provided on the handle at the other end; wherein the ultrasonic detection device is provided at the intersection of the end face of the tube head and the side face of the tube head. Preferably, a portion of the ultrasonic detection device, in particular the ultrasonic detection unit, protrudes from the outer surface of the tube head. Alternatively, a portion of the ultrasonic detection device, in particular the ultrasonic detection unit, is flush with the outer surface of the tube head.

[0015] The ablation catheter of the present invention compactly combines an ultrasonic detection device on the basis of the existing ablation catheter, which can realize real-time detection of atrial wall thickness and ablation depth. The ultrasonic detection device used in the present invention is preferably in the form of an ultrasonic crystal array connected in a phased array manner, wherein the size of a single ultrasonic crystal is relatively small (usually below 0.3 mm), making the entire device compact. In use, the ultrasonic crystal array directly emits a high-frequency sound beam (usually above 10 MHz) to the surface to be measured, which has the advantages of high resolution and strong penetration. When the ultrasonic crystal array is combined with the ablation catheter, better detection of atrial wall thickness and ablation depth can be achieved.

[0016] Specifically, in the present invention, the ultrasonic detection device is positioned at the junction of the tube head end face and the tube head side face, so that the detection range of the ultrasonic detection device covers the front of the ablation catheter end face and the upper side of the ablation catheter. This ultrasonic detection device configuration provides a wide detection range for the ablation catheter, allowing the operator to achieve real-time detection of atrial wall thickness and ablation depth without additional fine adjustments during use, thereby facilitating easy operation and a compact structure. Furthermore, this configuration of the ultrasonic detection device means that the distance to the ablation site is always short, thereby improving the quality and resolution of ultrasonic detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The advantages and features of the present invention will now be described in detail with reference to the accompanying drawings, in which the components are not necessarily drawn to scale, wherein:

[0018] Figure 1 A front view of an embodiment of the ablation catheter of the present invention is shown.

[0019] Figure 2 yes Figure 1 A partial enlarged view of the ablation catheter, in which the ablation catheter is cut along a vertical plane to show internal details.

[0020] Figure 3 A perspective view showing the end portion of another embodiment of the ablation catheter of the present invention.

[0021] Figure 4 A perspective view showing the end portion of yet another embodiment of the ablation catheter of the present invention.

[0022] Figure 5 A front view of an embodiment of an ultrasound detection device of an ablation catheter of the present invention is shown, which specifically shows the details of the ultrasound detection device.

[0023] It should be understood that the drawings are drawn for illustration purposes only and are not to be construed as limiting the present invention. DETAILED DESCRIPTION

[0024] In this specification, the "near end" and "far end" are divided based on the position of the operator, that is, the end closer to the operator during use is called the "near end" and the end farther from the operator is called the "far end".

[0025] The present invention provides an ablation catheter, comprising:

[0026] The tube body is in the form of a hollow tube and has two ends, a proximal end and a distal end;

[0027] A handle having a proximal end and a distal end, wherein the distal end of the handle is connected to the proximal end of the tube body;

[0028] a curvature adjustment section having a proximal end and a distal end, wherein the proximal end of the curvature adjustment section is connected to the distal end of the tube body, and the curvature of the curvature adjustment section can be adjusted along its axial direction;

[0029] The tube head is in the form of a hollow tube, having two ends, a proximal end and a distal end, wherein the distal end of the tube head is closed, and the proximal end of the tube head is connected to the distal end of the curvature adjustment section;

[0030] an energy transmission pathway, the energy transmission pathway being disposed within the tube head, the tube body, the handle, and the curvature adjustment section, and being connected to the tube head at one end so as to be capable of transmitting energy to the tube head, and being connected to an energy input interface disposed on the handle at the other end; and

[0031] An ultrasonic detection device comprising an ultrasonic detection unit and an ultrasonic detection unit wire, wherein the ultrasonic detection unit is capable of emitting and detecting high-frequency sound beams, the ultrasonic detection unit wire being connected to the ultrasonic detection unit at one end and to an ultrasonic connection socket provided on the handle at the other end; wherein the ultrasonic detection device is provided at the intersection of the end face of the tube head and the side face of the tube head. Preferably, a portion of the ultrasonic detection device, in particular the ultrasonic detection unit, protrudes from the outer surface of the tube head. Alternatively, a portion of the ultrasonic detection device, in particular the ultrasonic detection unit, is flush with the outer surface of the tube head.

[0032] It should be understood that the "high-frequency sound beam" mentioned in the present invention refers to an ultrasonic sound beam with a frequency range of more than 10 MHz.

[0033] In a preferred embodiment of the present invention, the ultrasonic detection unit is connected to the end face of the tube head and the side face of the tube head at the same time. In this way, when the ultrasonic detection unit is in the form of multiple independent units, the central axis direction of each of the ultrasonic detection units can form an obtuse angle with the plane direction of the end face of the tube head. Alternatively, when the ultrasonic detection unit is in the form of a sheet, it can simultaneously cover a portion of the end face of the tube head and a portion of the side face of the tube head. All of the above-mentioned specific configurations can achieve the technical effect of covering the front of the end face of the ablation catheter and the top of the side face of the ablation catheter as described above.

[0034] In a preferred embodiment of the present invention, an ultrasonic device mounting surface is provided at the intersection of the end face of the tube head and the side face of the tube head. The planar direction of the ultrasonic device mounting surface forms an obtuse angle with the planar direction of the end face of the tube head, and the ultrasonic detection unit is provided on the ultrasonic device mounting surface. Preferably, the obtuse angle formed between the planar direction of the ultrasonic device mounting surface and the planar direction of the end face of the tube head is in the range of 95 degrees to 175 degrees, more preferably in the range of 130 degrees to 140 degrees, and even more preferably 135 degrees. When the obtuse angle formed between the planar direction of the ultrasonic device mounting surface and the planar direction of the end face of the tube head is smaller, the ultrasonic detection unit can detect a larger area above the side face of the ablation catheter. Conversely, when the obtuse angle formed between the planar direction of the ultrasonic device mounting surface and the planar direction of the end face of the tube head is larger, the ultrasonic detection unit can better detect the front of the ablation catheter. More preferably, the ultrasonic detection unit is in the form of multiple independent units. The ranges of the multiple independent ultrasonic detection units overlap with each other to form a wider detection range, in particular, a detection range covering the front of the end face of the ablation catheter and the top of the side of the ablation catheter. Still more preferably, the ultrasonic device mounting surface is a continuous surface extending along the circumference of the tube head, and the ultrasonic detection units are evenly distributed along the circumference of the tube head. The ultrasonic device mounting surface extending continuously along the circumference of the tube head has the advantages of simple processing and smooth surface. Alternatively, the ultrasonic device mounting surface is a plurality of independent mounting planes evenly distributed along the circumference of the tube head, wherein each independent mounting plane is provided with at least one ultrasonic detection unit. For example, the ultrasonic device mounting surface includes three mounting planes, each of which is provided with an ultrasonic detection unit, that is, the angular spacing between adjacent ultrasonic detection units is 120 degrees. The provision of the independent mounting planes makes the mounting plane itself flat, which facilitates the installation of the ultrasonic detection unit.

[0035] It should be understood that in actual applications, technicians can configure more or fewer ultrasound detection units based on technical requirements, such as two, three, or four ultrasound detection units. More ultrasound detection units provide more consistent high-frequency sound beam coverage, while fewer ultrasound detection units reduce the complexity and cost of the ablation catheter.

[0036] In a preferred embodiment of the present invention, the ultrasonic detection unit includes a sensing surface for emitting and detecting high-frequency acoustic beams, with an ultrasonic crystal array arranged on the sensing surface. Preferably, the ultrasonic crystals in the ultrasonic crystal array are connected in a phased array configuration, and the size of each ultrasonic crystal is less than 0.5 mm, more preferably less than 0.3 mm, and even more preferably less than 0.2 mm. More preferably, the frequency of the high-frequency acoustic beam emitted by the ultrasonic crystals is above 10 MHz, preferably within the range of 20 MHz to 40 MHz. More preferably, the penetration depth of the ultrasonic crystals is greater than 5 mm. During use, the ablation catheter of the present invention can substantially cover the entire longitudinal length of the endocardial myocardium, with a longitudinal tissue resolution of 0.1 mm to 0.15 mm, preferably 0.08 mm to 0.1 mm. In the context of the high-frequency ultrasonic crystal array, image spatial resolution and contrast resolution are significantly improved, enabling resolution of different tissue types within the myocardium and of adjacent small targets between tissues, resulting in soft and delicate images.

[0037] In a preferred embodiment of the present invention, the ultrasonic detection unit is in the form of a partial sphere, with its spherical surface serving as the sensing surface, enabling the emission and detection of high-frequency acoustic beams along the normal direction of the sphere. For example, the ultrasonic detection unit is hemispherical. The hemispherical ultrasonic detection unit propagates the high-frequency acoustic beam outward in a substantially hemispherical pattern. This allows a single ultrasonic detection unit to cover a large area. It should be understood that due to the diffuse propagation characteristics of high-frequency acoustic beams, the actual propagation pattern of the high-frequency acoustic beam emitted by a hemispherical ultrasonic detection unit is often larger than a hemisphere. More preferably, the ultrasonic detection unit further includes a plurality of longitudinal mounting slots extending along the longitudinal direction of the sphere, wherein each longitudinal mounting slot contains a plurality of ultrasonic crystals. Even more preferably, the ultrasonic detection unit further includes a plurality of latitudinal mounting slots extending along the latitudinal direction of the sphere, wherein each latitudinal mounting slot contains a plurality of ultrasonic crystals. The ultrasonic crystals in the longitudinal and / or latitudinal mounting slots preferably operate in a phased array configuration, with each ultrasonic crystal covering a sector. This configuration of the longitude / latitude mounting groove and the ultrasonic crystal is simple in structure and has a good coverage effect.

[0038] In a preferred embodiment of the present invention, the ablation catheter further includes an irrigation passageway disposed within the catheter head, the catheter body, the handle, and the curvature adjustment section. One end of the irrigation passageway is an irrigation port disposed on the handle, and the other end is a plurality of irrigation ports disposed on the catheter head. It should be understood that the irrigation passageway can allow a therapeutic agent or a functional agent (such as saline) to pass through.

[0039] In a preferred embodiment of the present invention, the ablation catheter further comprises: a mapping electrode and a mapping electrode wire connected thereto; wherein, the mapping electrode is arranged on the outer surface of the tube head and / or tube body for mapping electrocardiographic signals, and the mapping electrode wire is arranged inside the tube head, tube body, handle, and curvature adjustment section, and is connected to a signal connection socket arranged on the handle.

[0040] In a preferred embodiment of the present invention, the ablation catheter further includes a position detection device comprising a magnetic navigation coil and a magnetic navigation wire. The magnetic navigation coil is disposed within the catheter head, while the magnetic navigation wire is disposed within the catheter head, the catheter body, the handle, and the curvature adjustment section. The magnetic navigation wire is connected to the magnetic navigation coil at one end and to the signal connector at the other end. The magnetic navigation coil utilizes its electromagnetic properties to spatially identify the position of the ablation catheter, particularly the catheter tip, thereby achieving position detection.

[0041] In a preferred embodiment of the present invention, the ablation catheter further comprises: a curvature adjustment device, wherein the curvature adjustment device can adjust the curvature of the curvature adjustment section. Preferably, the curvature adjustment device comprises an adjustment knob provided on the handle.

[0042] In a preferred embodiment of the present invention, the ablation catheter further includes: a pressure sensor for detecting the adhesion pressure at the ablation site (i.e., the pressure of the catheter on the myocardial tissue), and a pressure sensor wire. The pressure sensor is disposed in the tube head, particularly in the polymer material layer of the tube head. The pressure sensor wire is disposed inside the tube head, tube body, handle, and curvature adjustment section, connected to the pressure sensor at one end and to the signal connection socket at the other end. The pressure sensor transmits the pressure detection signal to the external system through the tube body by connecting the pressure sensor wire, and calculates the contact and force conditions at the ablation site.

[0043] In a preferred embodiment of the present invention, the ablation catheter further includes: a temperature sensor for detecting the ablation temperature, a power sensor for detecting the ablation power, and sensor wires corresponding to the above-mentioned various sensors. The above-mentioned various sensors are arranged in the tube head, in particular, in the polymer material layer of the tube head. The various sensor wires are arranged inside the tube head, tube body, handle and curvature adjustment section, connected to the corresponding sensor at one end, and connected to the signal connection seat at the other end. Preferably, the ablation catheter further includes: a wire path, which is arranged inside the tube head, tube body, handle and curvature adjustment section, and is used to allow various wires (such as ultrasound detection unit wires, mapping electrode wires, magnetic navigation wires, sensor wires, etc.) to pass through.

[0044] The ablation catheter of the present invention can use ultrasonic virtual histology computer technology at the output end of the detection results to display different tissue types in different colors, and identify, measure and analyze them, so that the operator can effectively, accurately and quantitatively evaluate and judge the changes in myocardial tissue and the ablation depth during the ablation process, and adjust the ablation pressure, duration, temperature, power and other parameters in time when necessary, to ensure the effectiveness and safety of the operation to a greater extent, and provide a reliable and objective basis for the operator to formulate and implement quantitative and individualized ablation treatment strategies.

[0045] The various components of the ablation catheter of the present invention can be made of materials such as plastic and metal, and prepared using commonly used processing and molding methods. Specifically, the plastic material can be ABS (acrylonitrile-butadiene-styrene resin), nylon, polyurethane, etc., and the metal material can be stainless steel, aluminum, copper, etc. If plastic materials are used, the commonly used processing and molding methods are injection molding, molding, extrusion molding, etc. If metal materials are used, the commonly used processing and molding methods are machining, casting, stamping, bending, etc. Preferably, the curvature adjustment section is made of a flexible material or an easily deformable metal material (such as a metal braided material), the marking electrode is a platinum-iridium ring electrode, the tube head and the tube body have a metal shell, and a polymer material layer and a metal mesh layer are sequentially arranged inside, and an insulating layer is provided outside the wire.

[0046] The various parts of the ablation catheter of the present invention, especially the tube head, the tube body, the handle and the curvature adjustment section, are connected using a medical material connection method commonly used in the prior art, such as heat sealing.

[0047] Specific embodiments of the present invention will be described below with reference to the accompanying drawings; however, the present invention is not limited to these specific embodiments.

[0048] Figure 1 A front view of an embodiment of the ablation catheter of the present invention is shown. Figure 1As shown, the ablation catheter 1 includes: a tube body 2, a handle 3 connected to the proximal end of the tube body 2, a curvature adjustment section 4 connected to the distal end of the tube body 2, and a tube head 5 connected to the distal end of the curvature adjustment section 4. Four platinum-iridium ring electrodes 6 are also provided on the outer surface of the tube head 5 and the tube body 2. The platinum-iridium ring electrodes 6 constitute two groups of mapping electrodes for collecting electrocardiographic signals. Also connected to the distal end of the handle 3 are: a signal connection socket 7 for connecting various types of wires, an infusion interface 8 for introducing the liquid to be infused, an energy input interface 9 for introducing ablation energy, and an ultrasound connection socket 10 for inputting and outputting ultrasound signals. Two adjustment knobs 3A and 3B for adjusting the curvature are also provided on the handle 3. In addition, six infusion ports 5A for distributing the infusion liquid are also provided on the tube head 5, of which three infusion ports 5A are provided on the opposite side and cannot be used on the opposite side. Figure 1 In addition, an ultrasonic device mounting surface 5B is provided at the junction of the end face of the tube head 5 and the side face of the tube head 5. The plane direction of the ultrasonic device mounting surface 5B forms an angle of 135 degrees with the plane direction of the end face of the tube head 5. Two ultrasonic detection units 11 arranged opposite to each other in the circumferential direction of the tube head 5 are provided on the ultrasonic device mounting surface 5B.

[0049] Figure 2 yes Figure 1 A partial enlarged view of the ablation catheter, wherein the ablation catheter is cut along a vertical plane to show the internal details. Figure 2 As shown, the tube body 2 and tube head 5 are hollow tubes that house an ultrasonic detection unit wire 12, an energy transmission pathway 13, an infusion pathway 14, and a magnetic navigation wire 15. The tube head 5 and tube body 2 have metal shells, and their inner walls are sequentially formed with a polymer material layer and a metal mesh layer. A magnetic navigation coil 16 is located within the polymer material layer of the tube head 5 at the junction of the magnetic navigation wire 15 and the tube head 5.

[0050] Figure 3 A perspective view of the end portion of another embodiment of the ablation catheter of the present invention is shown. Figure 3 An alternative arrangement of the ultrasonic detection unit is shown in detail. Figure 3 As shown, the ultrasonic device mounting surface 5B' is a continuous surface extending along the entire circumference of the pipe head 5'. The three ultrasonic detection units 11 are evenly distributed along the circumference of the pipe head 5', so that the angular spacing between adjacent ultrasonic detection units 11 is 120 degrees.

[0051] Figure 4 FIG2 is a perspective view showing the end portion of yet another embodiment of the ablation catheter of the present invention. Figure 4 Another alternative arrangement of the ultrasonic detection unit is specifically shown. Figure 4As shown, the ultrasonic device mounting surface 5B" is three independent mounting planes evenly distributed along the circumference of the pipe head 5", wherein each mounting plane is provided with an ultrasonic detection unit 11. The angular spacing between adjacent ultrasonic detection units 11 is also 120 degrees.

[0052] Figure 5 FIG1 shows a front view of an embodiment of an ultrasound detection device of an ablation catheter of the present invention, which specifically shows the details of the ultrasound detection device. Figure 5 As shown, the ultrasonic detection unit 11 is in the form of a hemisphere and is connected to an ultrasonic detection unit wire 12. The spherical surface of the ultrasonic detection unit 11 is arranged with multiple longitudinal mounting slots 11A extending in the longitude direction and multiple latitude mounting slots 11B extending in the latitude direction. Multiple ultrasonic crystals are installed in each longitudinal mounting slot 11A and latitude mounting slot 11B, thereby forming an array.

[0053] While various preferred embodiments have been shown and described above, it will be apparent to those skilled in the art that modifications and variations may be made without departing from the scope of the invention as defined by the appended claims.

Claims

1. An ablation catheter, characterized in that: include: The tube body is in the form of a hollow tube and has two ends, a proximal end and a distal end; A handle having a proximal end and a distal end, wherein the distal end of the handle is connected to the proximal end of the tube body; a curvature adjustment section having a proximal end and a distal end, wherein the proximal end of the curvature adjustment section is connected to the distal end of the tube body, and the curvature of the curvature adjustment section can be adjusted along its axial direction; The tube head is in the form of a hollow tube, having two ends, a proximal end and a distal end, wherein the distal end of the tube head is closed, and the proximal end of the tube head is connected to the distal end of the curvature adjustment section; an energy transmission pathway, the energy transmission pathway being disposed within the tube head, the tube body, the handle, and the curvature adjustment section, and being connected to the tube head at one end so as to be capable of transmitting energy to the tube head, and being connected to an energy input interface disposed on the handle at the other end; and An ultrasonic detection device, comprising an ultrasonic detection unit and an ultrasonic detection unit wire, wherein the ultrasonic detection unit is capable of emitting and detecting high-frequency sound beams, the ultrasonic detection unit wire is connected to the ultrasonic detection unit at one end and to an ultrasonic connection socket provided on the handle at the other end; wherein the ultrasonic detection device is provided at the junction of the end face of the tube head and the side face of the tube head, The ultrasonic detection unit includes a sensing surface for emitting and detecting high-frequency sound beams, an ultrasonic crystal array is arranged on the sensing surface, and the ultrasonic crystals in the ultrasonic crystal array are connected in a phased array manner, and the size of each ultrasonic crystal is less than 0.5 mm. The ultrasonic detection unit is in the form of a partial sphere, and its spherical surface serves as the sensing surface, so that high-frequency sound beams can be emitted and detected along the normal direction of the spherical surface. The ultrasonic detection unit also includes a plurality of longitude mounting grooves extending along the longitude direction of the spherical surface, wherein each of the longitude mounting grooves is provided with a plurality of ultrasonic crystals, and a plurality of latitude mounting grooves extending along the latitude direction of the spherical surface, wherein each of the latitude mounting grooves is provided with a plurality of ultrasonic crystals.

2. The ablation catheter according to claim 1, characterized in that The ultrasonic detection unit is connected to the end surface of the pipe head and the side surface of the pipe head at the same time.

3. The ablation catheter according to claim 1, characterized in that An ultrasonic device mounting surface is provided at the junction of the end face of the tube head and the side face of the tube head. The plane direction of the ultrasonic device mounting surface forms an obtuse angle with the plane direction of the end face of the tube head. The ultrasonic detection unit is provided on the ultrasonic device mounting surface.

4. The ablation catheter according to claim 3, characterized in that The ultrasonic detection unit is in the form of a plurality of independent units.

5. The ablation catheter according to claim 4, characterized in that The ultrasonic device installation surface is a continuous surface extending along the circumference of the pipe head, and the ultrasonic detection units are evenly distributed along the circumference of the pipe head.

6. The ablation catheter according to claim 4, characterized in that The ultrasonic device mounting surface is a plurality of independent mounting planes evenly distributed along the circumference of the tube head, wherein at least one ultrasonic detection unit is provided on each independent mounting plane.

7. The ablation catheter according to claim 6, characterized in that The ultrasonic device installation surface includes three installation planes.

8. The ablation catheter according to any one of claims 1 to 7, characterized in that: It also includes a perfusion passage, which is arranged inside the tube head, tube body, handle, and curvature adjustment section. One end of the perfusion passage is a perfusion interface arranged on the handle, and the other end is a plurality of perfusion ports arranged on the tube head.

9. The ablation catheter according to any one of claims 1 to 7, characterized in that: Also includes: A mapping electrode and a mapping electrode wire connected thereto; wherein the mapping electrode is arranged on the outer surface of the tube head and / or the tube body for mapping electrocardiographic signals, and the mapping electrode wire is arranged inside the tube head, tube body, handle, and curvature adjustment section, and is connected to the signal connection socket arranged on the handle.

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