Ablation catheter, control method thereof and ablation device
By setting up spaced mapping electrodes and ablation electrodes on the ablation catheter, the problem of inaccurate positioning of target positions in radiofrequency ablation treatment is solved, and efficient and accurate ablation effect is achieved, which simplifies operation and reduces patient pain.
Patent Information
- Application Number
- CN202311435065.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-30
- Publication Date
- 2025-05-02
AI Technical Summary
In radiofrequency ablation treatment, movement of the catheter may lead to inaccurate positioning of the target, poor ablation effect, and prolonged surgery time, increasing patient pain.
An ablation catheter is designed to include a spaced distribution of mapping electrodes and ablation electrodes that can perform mapping and ablation functions simultaneously without the need for additional mapping catheters.
By simplifying the difficulty of operation, improving the accuracy of ablation, directly releasing ablation energy, improving the ablation effect, and reducing patient pain.
Smart Images
Figure CN119908830A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of medical devices, and in particular to an ablation catheter and a control method thereof, and an ablation device. Background Art
[0002] At present, radiofrequency ablation (RFA) is widely used in the treatment of heart diseases such as arrhythmia. Radiofrequency ablation is an interventional technology that delivers an electrode catheter into a specific part of the heart through a vein or artery, releases radiofrequency ablation energy to cause coagulative necrosis of local lesion tissue, and achieves a therapeutic effect.
[0003] During the ablation process, it is usually necessary to place a mapping catheter in the patient's body in advance to determine the location of the lesion tissue, and then place the ablation catheter to the target location to release the radiofrequency ablation energy. During this process, the movement of the catheter may lead to inaccurate target location positioning and poor ablation effect. In addition, it will also prolong the operation time and increase the patient's pain. Summary of the invention
[0004] In view of this, the present disclosure provides an ablation catheter and a control method thereof, and an ablation device to solve the problem of inaccurate target location positioning during ablation and thus poor ablation effect in the related art.
[0005] In a first aspect, an ablation catheter is provided, comprising: a tube body; at least one mapping electrode for collecting electrical signals within a target range so as to determine a target area where ablation needs to be performed based on the electrical signals; and at least one ablation electrode for applying ablation energy to the target area; wherein at least one mapping electrode and at least one ablation electrode are arranged at intervals on the periphery of the tube body along the extension direction of the tube body.
[0006] In some embodiments, at least one mapping electrode and at least one ablation electrode are combined into at least one electrode pair, the mapping electrode and ablation electrode included in each electrode pair are non-annular electrodes, and the mapping electrodes and ablation electrodes included in each electrode pair are symmetrically distributed along the extension direction of the tube body.
[0007] In some embodiments, there are multiple electrode pairs, ablation electrodes included in the multiple electrode pairs are spaced apart on a first bus bar on the outer circumference of the tube body, and mapping electrodes included in the multiple electrode pairs are spaced apart on a second bus bar on the outer circumference of the tube body.
[0008] In some embodiments, there are multiple electrode pairs, and the ablation electrodes and mapping electrodes included in the multiple electrode pairs are arranged at intervals on at least two busbars on the outer circumference of the tube body, and each busbar is alternately provided with ablation electrodes and mapping electrodes.
[0009] In some embodiments, at least one ablation electrode includes a first polarity electrode and a second polarity electrode, and the first polarity electrode and the second polarity electrode have opposite polarities.
[0010] In some embodiments, the electrode pairs include ablation electrode pairs and mapping electrode pairs, wherein the first polarity electrode and the second polarity electrode included in at least one ablation electrode are combined into at least one ablation electrode pair, each ablation electrode pair includes at least one first polarity electrode and at least one second polarity electrode, and at least one mapping electrode is combined into at least one mapping electrode pair; and, along the extension direction of the tube body, the ablation electrode pairs and the mapping electrode pairs are alternately arranged on the periphery of the tube body.
[0011] In some embodiments, there are multiple electrode pairs, and the ablation electrodes and mapping electrodes included in the multiple electrode pairs are arranged at intervals on at least two bus bars on the periphery of the tube body. Each bus bar is alternately provided with ablation electrodes and mapping electrodes, and along the extension direction of the tube body, the polarities of the ablation electrodes included in any two adjacent electrode pairs are opposite.
[0012] In some embodiments, the ablation electrode and the mapping electrode are ring electrodes, and along the extension direction of the tube body, the mapping electrode and the ablation electrode are alternately sleeved on the outer circumference of the tube body.
[0013] In some embodiments, the ablation catheter further includes a head electrode, which is disposed at the end of the catheter body.
[0014] In a second aspect, an ablation device is provided, comprising: the ablation catheter provided in the first aspect; a mapping signal connection part connected to the ablation catheter and used to transmit a mapping signal to the ablation catheter; and an ablation energy generating device connection part connected to the ablation catheter and used to transmit ablation energy to the ablation catheter.
[0015] In a third aspect, a control method for an ablation catheter is provided, which is applied to the ablation catheter provided in the first aspect, and the method includes: using the ablation catheter to collect electrical signals within a target range; determining a target area for ablation based on the collected electrical signals; and using the ablation catheter to apply ablation energy to the target area.
[0016] In some embodiments, the method further includes: collecting real-time electrical signals using an ablation catheter during the application of ablation energy; and comparing the real-time electrical signals with reference signals to determine the real-time ablation status.
[0017] The ablation catheter provided by the present disclosure can provide mapping electrodes and ablation electrodes spaced apart at one end of the ablation catheter, so that the ablation catheter has both mapping and ablation functions. In this way, during the ablation process, the mapping electrodes of the ablation catheter can detect the surrounding electrical signals. After determining the target area that needs to be ablated based on the abnormal electrical signals, the ablation electrodes of the ablation catheter can directly release ablation energy to the target area. In this process, there is no need to intervene with an additional mapping catheter. When the ablation catheter of this embodiment is used for radiofrequency ablation treatment, the difficulty of operating the ablation catheter can be simplified, the accuracy of ablation can be improved, and the ablation effect can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Shown is a schematic structural diagram of an ablation catheter provided in an embodiment of the present disclosure.
[0019] Figure 2 Shown is a schematic structural diagram of a non-circular electrode pair provided in an embodiment of the present disclosure.
[0020] Figure 3 Shown is a schematic structural diagram of another ablation catheter provided in an embodiment of the present disclosure.
[0021] Figure 4 Shown is a schematic structural diagram of another ablation catheter provided in an embodiment of the present disclosure.
[0022] Figure 5 Shown is a schematic structural diagram of another ablation catheter provided in an embodiment of the present disclosure.
[0023] Figure 6 Shown is a schematic structural diagram of another ablation catheter provided in an embodiment of the present disclosure.
[0024] Figure 7 Shown is a schematic structural diagram of another ablation catheter provided in an embodiment of the present disclosure.
[0025] Figure 8 Shown is a schematic structural diagram of another ablation catheter provided in an embodiment of the present disclosure.
[0026] Fig. 9 Shown is a schematic structural diagram of an ablation device provided in an embodiment of the present disclosure.
[0027] Fig.10 Shown is a flow chart of a method for controlling an ablation catheter provided in an embodiment of the present disclosure.
[0028] Figure numerals: 110 - tube body; 120 - mapping electrode; 130 - ablation electrode; 131 - first polarity electrode; 132 - second polarity electrode; 140 - head electrode; 910 - ablation catheter; 920 - operating handle; 930 - mapping signal connection part; 940 - ablation energy generating device connection part. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.
[0030] As mentioned above, during radiofrequency ablation treatment, it is usually necessary to place an additional mapping catheter in the patient's body in advance. After determining the location of the lesion tissue, the ablation catheter is placed at the target location to perform radiofrequency ablation. During this process, it is necessary to guide the mapping catheter and the ablation catheter to intervene in the heart cavity, which increases the operation time and risk. In addition, when placing the ablation catheter, the target position may be inaccurately positioned, so that the ablation range of the ablation catheter cannot cover the lesion tissue. At the same time, during the ablation process, the ablation effect cannot be monitored in real time through the mapping catheter.
[0031] In view of this, the present disclosure provides an ablation catheter, comprising: a tube body; at least one mapping electrode for collecting electrical signals within a target range, so as to determine a target area that needs to be ablated based on the electrical signals; at least one ablation electrode for applying ablation energy to the target area; wherein at least one mapping electrode and at least one ablation electrode are arranged at intervals on the periphery of the tube body along the extension direction of the tube body. In this way, during the ablation process, the mapping electrodes of the ablation catheter can detect electrical signals around, and after determining the target area that needs to be ablated based on the abnormal electrical signals, the ablation electrodes of the ablation catheter can directly release ablation energy to the target area, and in this process, there is no need to intervene with an additional mapping catheter. Therefore, it is possible to simplify the operating difficulty of the ablation catheter, improve the accuracy of ablation, and thus improve the ablation effect.
[0032] The ablation device provided by the present disclosure will be described in detail below with reference to the accompanying drawings and embodiments.
[0033] Figure 1 The figure shows an ablation catheter provided by an embodiment of the present disclosure, such as Figure 1 As shown, the ablation catheter includes: a tube body 110 , a mapping electrode 120 and an ablation electrode 130 .
[0034] The tube body 110 is tubular in shape and made of insulating material. The tube body 110 includes a first end and a second end. During the ablation process, the first end of the tube body 110 punctures into the patient's body from outside the body and extends into the heart cavity through the blood vessels; the second end of the tube body 110 is connected to the operating handle.
[0035] The mapping electrode 120 and the ablation electrode 130 are made of conductive material and are arranged at intervals on the outer circumference of the first end of the tube body 110 along the extension direction of the tube body 110 , and are insulated from each other to avoid short circuit.
[0036] After the first end of the tube body 110 moves to the target range (such as the left atrium, left ventricle, etc.), the mapping electrode 120 arranged at the first end of the tube body 110 can collect electrical signals within the target range. Among them, the target range can be the maximum area range where the mapping electrode 120 can detect electrical signals. The heart generates cardiac electrical signals through various ion exchanges. The electrical signals cause the contraction of the myocardium through the coupling of cardiac excitation and contraction, that is, cause the heart to beat; when the formation or conduction of electrical signals is abnormal, it will cause the regularity of the heart beat to be disturbed, forming arrhythmia. Therefore, the collected electrical signals can be compared with the reference signal to determine the location information of the abnormal discharge, and then obtain the target area where ablation is required.
[0037] After determining the target area, the ablation electrode 130 disposed at the first end of the tube body 110 applies ablation energy to the target area, and the ablation energy can destroy tissue cells in the target area, so that the lesion tissue is ablated. The ablation energy can be an electric pulse or a radio frequency electric field, and the present disclosure does not make specific restrictions on this.
[0038] During the process of applying ablation energy, the mapping electrode 120 can also collect electrical signals in the target area in real time to detect the ablation status of the lesion tissue and determine whether the ablation is completed.
[0039] The disclosed embodiment provides mapping electrodes and ablation electrodes spaced apart at one end of the ablation catheter, so that the ablation catheter has both mapping and ablation functions. In this way, during the ablation process, the mapping electrodes of the ablation catheter can detect the surrounding electrical signals. After determining the target area that needs to be ablated based on the abnormal electrical signals, the ablation electrodes of the ablation catheter can directly release ablation energy to the target area. In this process, there is no need to intervene with an additional mapping catheter. When the ablation catheter of this embodiment is used for radiofrequency ablation treatment, the difficulty of operating the ablation catheter can be simplified, the accuracy of ablation can be improved, and the ablation effect can be improved.
[0040] The specific arrangement of the mapping electrode and the ablation electrode in the ablation catheter will be described in detail below with reference to the accompanying drawings of the specification.
[0041] In some embodiments, the ablation catheter includes at least one mapping electrode and at least one ablation electrode, and the at least one mapping electrode and the at least one ablation electrode together constitute at least one electrode pair, that is, one electrode pair includes at least one mapping electrode and at least one ablation electrode. In one electrode pair, both the mapping electrode and the ablation electrode are non-annular; and along the extension direction of the tube body 110, the mapping electrode 120 and the ablation electrode 130 included in one electrode pair are symmetrically distributed on the outer circumference of the tube body 110. When the ablation catheter rotates circumferentially, the rotating figure formed by the rotation of the ablation electrode 130 can at least partially cover the acquisition range of the mapping electrode 120.
[0042] Figure 2 FIG. 1 is a schematic diagram of a non-circular electrode pair provided by an embodiment of the present disclosure. Figure 1 and Figure 2 , the mapping electrode 120 and the ablation electrode 130 in one electrode pair are both semi-annular, and, on the axial section of one tube body 110, two semi-annular mapping electrodes 120 and ablation electrodes 130 are arranged opposite to each other. When the tube body 110 rotates circumferentially, the ablation electrode 130 can rotate to the position of the original mapping electrode 120. Therefore, when a certain area within the target range of the mapping electrode 120 is determined as the target area, the ablation electrode 130 is moved to the target area by rotating the tube body 110 so that its ablation range covers the target area.
[0043] During this process, the ablation catheter does not move forward or backward, so the ablation electrode can be more accurately aligned with the target area, thereby improving the accuracy of ablation, simplifying the operation of the ablation catheter, and reducing the patient's pain.
[0044] The above introduces an implementation method in which the mapping electrode and the ablation electrode in an electrode pair are both semi-annular. It is understandable that the mapping electrode and the ablation electrode can also be set to a 1 / 3 ring shape, a 1 / 4 ring shape or any other possible shape. It is only necessary to meet the requirement that when the ablation catheter rotates circumferentially, the rotating figure formed by the rotation of the ablation electrode can at least partially cover the acquisition range of the mapping electrode. Of course, an electrode pair can also include multiple ablation electrodes and / or mapping electrodes, and the arrangement method can be specifically determined according to actual conditions, and the present disclosure does not make specific restrictions on this.
[0045] The following will continue to introduce the specific arrangement of multiple electrode pairs when the ablation catheter includes multiple electrode pairs.
[0046] Figure 3 FIG. 2 is a schematic diagram of the structure of another ablation catheter provided by an embodiment of the present disclosure. Figure 3As shown, each electrode pair includes a mapping electrode 120 and an ablation electrode 130. On an axial section of the ablation catheter, the mapping electrode 120 and the ablation electrode 130 are symmetrically distributed along the axis of the tube body 110. The mapping electrodes 120 in the plurality of electrode pairs are arranged at intervals on a busbar on the periphery of the tube body 110. Corresponding to the interval distribution of the mapping electrodes 120, the ablation electrodes 130 in the plurality of electrode pairs are also arranged at intervals on another busbar on the periphery of the tube body 110.
[0047] In this way, the electrical signals around the ablation catheter can be collected at multiple points at the same time, expanding the detection range and further reducing the movement of the ablation catheter in the patient's body. At the same time, each mapping electrode is provided with a corresponding ablation electrode; when a mapping electrode on the ablation catheter collects an abnormal electrical signal, the ablation electrode corresponding to the mapping electrode can be rotated to the target area for ablation by rotating the tube body.
[0048] In other embodiments, Figure 4 As shown, each electrode pair includes a mapping electrode 120 and an ablation electrode 130. In addition, on an axial section of the ablation catheter, the mapping electrode 120 and the ablation electrode 130 are symmetrically distributed along the axis of the tube body 110. More specifically, on a busbar of the axial section, the mapping electrode 120 and the ablation electrode 130 are alternately and spaced apart. Corresponding to the distribution of the mapping electrode 120 and the ablation electrode 130, on another busbar of the axial section, the ablation electrode 130 and the mapping electrode 120 are alternately and spaced apart, so that each mapping electrode 120 corresponds to an ablation electrode 130.
[0049] Compared with the above embodiment, the solution of this embodiment can collect electrical signals in different directions at the same time, further expanding the detection range of the ablation catheter.
[0050] The following further introduces an implementation method of respectively providing electrodes of different polarities among a plurality of ablation electrodes.
[0051] In some embodiments, the ablation electrode includes a first polarity electrode and a second polarity electrode, wherein the first polarity electrode and the second polarity electrode have opposite polarities. Exemplarily, the first polarity electrode is a positive polarity electrode, and correspondingly, the second polarity electrode is a negative polarity electrode.
[0052] When the first polarity electrode and the second polarity electrode simultaneously output voltages of opposite polarity, an electric field action area can be generated between any first polarity electrode and the second polarity electrode. Therefore, by setting the distribution of the first polarity electrode and the second polarity electrode, or by selectively applying ablation energy to certain first polarity electrodes and second polarity electrodes, the application range of the ablation energy can be accurately controlled; and, compared with the implementation method including only a single polarity ablation electrode, the voltage required in this embodiment is correspondingly reduced, which improves safety, and at the same time, the requirements for high voltage resistance and insulation of the components in the ablation catheter are also correspondingly reduced, and the overall cost is reduced.
[0053] Figure 5 FIG. 2 is a schematic diagram of the structure of another ablation catheter provided by an embodiment of the present disclosure. Figure 5 As shown, on an axial section of the ablation catheter, a first polarity electrode 131 and a second polarity electrode 132 are symmetrically distributed along the axis of the tube body 110, and together form an ablation electrode pair. On the same axial section, two mapping electrodes 120 are symmetrically distributed along the axis of the tube body 110, and together form a mapping electrode pair. Along the extension direction of the tube body 110, the ablation electrode pair and the mapping electrode pair are alternately arranged on the periphery of the tube body. On a generatrix of the axial section, the first polarity electrode 131 and the second polarity electrode 132 are respectively on both sides of the mapping electrode 120.
[0054] During the ablation process, after a mapping electrode pair on the ablation catheter determines the target area to be ablated, the two ablation electrode pairs on both sides of the mapping electrode pair work together to form a uniform and stable electric field action area around the mapping electrode pair. Figure 5 In one ablation electrode pair, an electric field action zone is formed between the first polarity electrode 131 and the second polarity electrode 132; and the first polarity electrode 131 simultaneously forms an electric field action zone with the second polarity electrode 132 in another ablation electrode pair. Similarly, this embodiment can form four electric field action zones, and the action ranges of the four electric field action zones partially overlap, so that the ablation energy applied by the ablation catheter in this embodiment is more uniform and stable, and the ablation effect is better.
[0055] In other embodiments, on a generatrix of the axial section, the polarities of the ablation electrodes on both sides of the mapping electrode are the same. Figure 6 As shown, on one busbar of the axial section, the ablation electrodes on both sides of the mapping electrode 120 are both first polarity electrodes 131; on another busbar of the axial section, the ablation electrodes on both sides of the mapping electrode 120 are both second polarity electrodes 132. This arrangement can also form four electric field action areas, and its effect is similar to that of the above embodiment.
[0056] In some other embodiments, Figure 7 As shown, on a busbar of the axial section, the first polarity electrode 131 and the mapping electrode 120 are arranged alternately and at intervals; corresponding to the distribution of the mapping electrode 120 and the first polarity electrode 131, on another busbar of the axial section, the second polarity electrode 132 and the mapping electrode 120 are arranged alternately and at intervals. With the axis of the tube body 110 as the axis of symmetry, the upper and lower symmetrically arranged mapping electrodes 120 and the first polarity electrode 131 or the second polarity electrode 132 together form an electrode pair, so that each mapping electrode 120 corresponds to a first polarity electrode 131 or a second polarity electrode 132. In adjacent electrode pairs, the polarities of the included ablation electrodes are opposite.
[0057] In the ablation catheter provided in this embodiment, the mapping electrodes are evenly spaced and face different directions. Figure 5 or Figure 6 In the ablation catheter shown in the present embodiment, the distribution of the measuring electrodes is more dense, so that the collected electrical signals are more accurate, and the electrical signals in different directions can be collected at the same time, further expanding the detection range of the ablation catheter.
[0058] During the ablation process, after a mapping electrode on the ablation catheter determines the target area where ablation needs to be performed, the ablation electrodes on both sides of the mapping electrode and the opposite side work together to form at least two electric field action zones around the mapping electrode, and the action ranges of the electric field action zones partially overlap, so that the ablation energy applied by the ablation catheter in this embodiment is more uniform and stable, and the ablation effect is better.
[0059] The above describes the case where the mapping electrode and the ablation electrode are non-annular. The following specifically describes a specific configuration method where the mapping electrode and the ablation electrode are annular electrodes.
[0060] In some embodiments, Figure 8 As shown, the mapping electrode 120 and the ablation electrode 130 are both annular, and the tube body 110, the mapping electrode 120 and the ablation electrode 130 are coaxially arranged. Along the extension direction of the tube body 110, the mapping electrode 120 and the ablation electrode 130 are alternately sleeved on the outer circumference of the tube body 110.
[0061] The two ablation electrodes 130 adjacent to the mapping electrode 120 can be respectively set as a first polarity electrode and a second polarity electrode with opposite polarities. When a mapping electrode on the ablation catheter collects an abnormal electrical signal, the two ablation electrodes adjacent to the mapping electrode work together to form an electric field action area with the mapping electrode as the center, so as to ablate the diseased tissue in the target area.
[0062] In some embodiments, continue to refer to Figure 8A head electrode 140 is also provided at the first end of the tube body 110, and the head electrode 140 can be connected to the end of the tube body 110 by a snap-on connection. The head electrode 140 can also apply ablation energy. Specifically, the head electrode 140 can be set as a first polarity electrode or a second polarity electrode, and the head electrode 140 can cooperate with the ablation electrode 130 on the tube body 110 to generate an electric field action area with a larger coverage range, and it is only necessary to ensure that the polarity of the head electrode 140 is opposite to the polarity of at least one ablation electrode 130.
[0063] Exemplarily, the head electrode 140 is a first polarity electrode, and all the ablation electrodes 130 on the tube body 110 are set as second polarity electrodes; or, the head electrode 140 is a first polarity electrode, the first ablation electrode 130 is a second polarity electrode, and the second second polarity electrode is a first polarity electrode, so that the first polarity electrodes and the second polarity electrodes are alternately set.
[0064] For narrow areas in the heart cavity, the head electrode can be flexibly attached to the target position, making the ablation range more precise.
[0065] Based on the same inventive concept, an ablation device is also provided in the embodiment of the present disclosure. Since the principle of solving the problem in the embodiment of the device is similar to that in the above embodiment, the implementation of the embodiment of the device can refer to the implementation of the above embodiment, and the repeated parts will not be repeated.
[0066] Fig. 9 The ablation device in this embodiment includes an ablation catheter 910 provided in any of the above embodiments, and further includes an operating handle 920, a mapping signal connection part 930 and an ablation energy generating device connection part 940.
[0067] The second end of the ablation catheter 910 is connected to the first end of the operating handle 920, and the second end of the operating handle 920 is respectively connected to the mapping signal connection part 930 and the ablation energy generating device connection part 940. The electrical signal collected by the ablation catheter 910 is output by the mapping signal connection part 930, so as to use the electrical signal to determine the target position where ablation needs to be performed; the ablation energy generating device connection part 940 is connected to the ablation electrode and the head electrode in the ablation catheter 910, and is used to transmit the ablation energy generated in the ablation energy generating device to the ablation electrode and the head electrode, so as to perform ablation on the target position.
[0068] Based on the same inventive concept, the present disclosure also provides a control method for an ablation catheter, which is applied to the ablation catheter or ablation device provided in the present disclosure. Since the principle of solving the problem in the method embodiment is similar to that in the above-mentioned ablation catheter and device embodiments, the implementation of the method embodiment can refer to the implementation of the above-mentioned ablation catheter and device embodiments, and the repeated parts will not be repeated.
[0069] Fig.10 FIG. 2 is a flow chart of a control method for an ablation catheter provided by an embodiment of the present disclosure. Fig.10 As shown, the control method of the ablation catheter provided in the embodiment of the present disclosure includes the following steps.
[0070] S1010, using the ablation catheter to collect electrical signals within the target range.
[0071] After the first end of the ablation catheter enters the patient's body through a puncture outside the body and extends to the heart cavity through the blood vessels, the mapping electrodes arranged on the ablation catheter collect electrical signals within the surrounding target range.
[0072] S1020, determining a target area for ablation based on the collected electrical signals.
[0073] The collected electrical signal is compared with the reference signal to determine the location information of the abnormal discharge area, and based on the location information, the target area where ablation is required is determined.
[0074] Specifically, the reference signal is an electrical signal without abnormalities. Therefore, by comparing it with the reference signal, it is possible to determine whether the collected electrical signal is abnormal, and then the position information of the abnormal discharge area can be determined based on the position of the marking electrode that collects the abnormal electrical signal.
[0075] S1030, using an ablation catheter to apply ablation energy to the target area.
[0076] After the target area is determined, the ablation electrode on the ablation catheter can be moved to the corresponding position by rotating the catheter, and ablation energy can be applied to the target area to perform ablation on the target position.
[0077] In this way, during the ablation process, the mapping electrodes of the ablation catheter can detect the surrounding electrical signals. After determining the target area that needs to be ablated based on the abnormal electrical signals, the ablation electrodes of the ablation catheter can directly release ablation energy to the target area without the need for an additional mapping catheter. Therefore, the difficulty of operating the ablation catheter and device can be simplified, the accuracy of ablation can be improved, and the ablation effect can be improved.
[0078] In some embodiments, the control method of the ablation catheter further includes: collecting real-time electrical signals using the ablation catheter during the process of applying ablation energy; and comparing the real-time electrical signals with reference signals to determine the real-time ablation status.
[0079] A section of the ablation catheter is provided with both ablation electrodes and mapping electrodes. Therefore, during the process of the ablation electrode releasing ablation energy, the mapping electrode can collect electrical signals within the target range in real time and compare them with reference signals to generally determine the real-time ablation status. When it is detected that the abnormal electrical signal has changed to a normal electrical signal or is close to a normal electrical signal, the operator operating the ablation catheter can stop applying ablation energy to the target area in a timely manner to ensure the safety of the patient.
[0080] Those skilled in the art will appreciate that aspects of the present disclosure may be implemented as systems, methods or program products. When the program product is run on a terminal device such as an optoelectronic coordinated application device, the program code is used to enable the terminal device to execute the steps of various exemplary embodiments of the present disclosure described in the above method embodiment section of this specification.
[0081] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.
Claims
1. An ablation catheter, characterized in that: include: tube body; At least one mapping electrode, used for collecting electrical signals within a target range, so as to determine a target area requiring ablation based on the electrical signals; at least one ablation electrode for applying ablation energy to the target area; Wherein, the at least one mapping electrode and the at least one ablation electrode are arranged at intervals on the outer circumference of the tube body along the extension direction of the tube body.
2. The ablation catheter according to claim 1, characterized in that: The at least one mapping electrode and the at least one ablation electrode are combined into at least one electrode pair, and the mapping electrode and the ablation electrode included in each of the electrode pairs are non-annular electrodes; Furthermore, along the extension direction of the tube body, the mapping electrodes and ablation electrodes included in each electrode pair are symmetrically distributed.
3. The ablation catheter according to claim 2, characterized in that: There are multiple electrode pairs, and the ablation electrodes included in the multiple electrode pairs are spaced apart on a first bus bar on the outer circumference of the tube body, and the mapping electrodes included in the multiple electrode pairs are spaced apart on a second bus bar on the outer circumference of the tube body.
4. The ablation catheter according to claim 2, characterized in that: There are multiple electrode pairs, and the ablation electrodes and mapping electrodes included in the multiple electrode pairs are arranged at intervals on at least two busbars on the outer circumference of the tube body, and each busbar is alternately provided with ablation electrodes and mapping electrodes.
5. The ablation catheter according to claim 2, characterized in that: The at least one ablation electrode includes a first polarity electrode and a second polarity electrode, and the first polarity electrode and the second polarity electrode have opposite polarities.
6. The ablation catheter according to claim 5, characterized in that: The electrode pairs include ablation electrode pairs and mapping electrode pairs, wherein the first polarity electrode and the second polarity electrode included in the at least one ablation electrode are combined into at least one ablation electrode pair, each of the ablation electrode pairs includes at least one first polarity electrode and at least one second polarity electrode, and the at least one mapping electrode is combined into at least one mapping electrode pair; Furthermore, along the extension direction of the tube body, the ablation electrode pairs and the mapping electrode pairs are alternately arranged on the outer circumference of the tube body.
7. The ablation catheter according to claim 5, characterized in that: There are multiple electrode pairs, and the ablation electrodes and mapping electrodes included in the multiple electrode pairs are arranged at intervals on at least two busbars on the outer circumference of the tube body, and each busbar is alternately provided with ablation electrodes and mapping electrodes. Furthermore, along the extension direction of the tube body, the polarities of the ablation electrodes included in any two adjacent electrode pairs are opposite.
8. The ablation catheter according to claim 1, characterized in that: The ablation electrode and the mapping electrode are ring-shaped electrodes, and along the extension direction of the tube body, the mapping electrode and the ablation electrode are alternately sleeved on the outer circumference of the tube body.
9. The ablation catheter according to claim 1, characterized in that: It also includes a head electrode, which is arranged at the end of the tube body.
10. An ablation device, characterized in that: include: The ablation catheter according to any one of claims 1 to 9; A mapping signal connection part, connected to the ablation catheter, for transmitting a mapping signal to the ablation catheter; The ablation energy generating device connection part is connected to the ablation catheter and is used for transmitting ablation energy to the ablation catheter.
11. A method for controlling an ablation catheter, characterized in that: Applied to the ablation catheter according to any one of claims 1 to 9, the method comprising: Using the ablation catheter, collecting electrical signals within a target range; Determine the target area for ablation based on the acquired electrical signals; The ablation catheter is used to apply ablation energy to the target area.
12. The method according to claim 11, characterized in that Also includes: In the process of applying ablation energy, using the ablation catheter to collect real-time electrical signals; The real-time electrical signal is compared with a reference signal to determine the real-time ablation status.