CN116919563B - Ablation catheter, ablation device and ablation control method of ablation device - Google Patents
Ablation catheter, ablation device and ablation control method of ablation device Download PDFInfo
- Publication number
- CN116919563B CN116919563B CN202311197938.2A CN202311197938A CN116919563B CN 116919563 B CN116919563 B CN 116919563B CN 202311197938 A CN202311197938 A CN 202311197938A CN 116919563 B CN116919563 B CN 116919563B
- Authority
- CN
- China
- Prior art keywords
- electrode
- sub
- ablation
- impedance detection
- catheter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002679 ablation Methods 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000008280 blood Substances 0.000 claims abstract description 34
- 210000004369 blood Anatomy 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims description 50
- 238000013507 mapping Methods 0.000 claims description 17
- 239000012212 insulator Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 230000006870 function Effects 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- 230000005684 electric field Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 230000002107 myocardial effect Effects 0.000 abstract description 5
- 206010003119 arrhythmia Diseases 0.000 abstract description 3
- 230000006793 arrhythmia Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000001746 atrial effect Effects 0.000 description 8
- 230000000007 visual effect Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000003492 pulmonary vein Anatomy 0.000 description 2
- 206010003658 Atrial Fibrillation Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002847 impedance measurement Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 210000004165 myocardium Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Abstract
The invention discloses an ablation catheter, an ablation device and an ablation control method thereof, and relates to the technical field of medical instruments. The ablation catheter comprises a catheter body and a plurality of splines, the splines are arranged at the far end of the catheter body, each spline comprises a protection tube and at least one electrode ring arranged on the protection tube, each electrode ring comprises a plurality of sub-electrodes arranged at intervals along the circumferential direction of the protection tube, and wires of the sub-electrodes are accommodated in the protection tube and are suitable for being electrically connected with an ablation system. The invention improves the structure of the ablation catheter, provides an ablation catheter technology which can enable the energy of an ablation electric field to be more intensively acted on myocardial tissues, reduces the loss and side effect of current in blood, and greatly enhances the safety and effectiveness of ablation. Has wider prospect in the field of arrhythmia treatment.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to an ablation catheter, an ablation device and an ablation control method thereof.
Background
An existing ablation catheter includes a catheter and an electrode ring assembly disposed at a distal end of the catheter, the electrode ring assembly including a plurality of electrode rings disposed on a branch of the catheter. When an electric pulse passes through the electrode ring, an electric field forms an ablation electric field from the positive electrode to the negative electrode on the surface of the electrode ring. The emission of energy diverges circumferentially through the electrode ring.
However, the electrodes of such ablation catheters are of a unitary annular structure, the overall volume of the electrode being generally large, with respect to a single electrode ring, where a portion of the single electrode is in contact with atrial tissue and another portion of itself is surrounded by blood. Since blood is more conductive than atrial tissue, electrical discharge between the positive and negative electrodes can form arcs and bubbles, which can lead to loss of most of the energy of the pulsed electric field through the blood, while bubbles are generated in the blood, and microthrombus can lead to so-called invisible peduncles. Only a portion of the electric field applied to the electrode surface of the atrial wall of the individual electrode acts on the myocardium, creating an ablation site for atrial fibrillation ablation. Therefore, the conventional ablation catheter has a large loss of current in blood and a large side effect.
Disclosure of Invention
The invention mainly aims to provide an ablation catheter, an ablation device and an ablation control method thereof, and aims to realize the separation of electrode rings so as to control the discharge of sub-electrodes applied to the atrial wall and the non-discharge of sub-electrodes surrounded by blood, reduce the loss and side effect of current in the blood and enhance the safety and effectiveness of an ablation operation.
To achieve the above object, the present invention proposes an ablation catheter comprising:
a catheter body; and
the catheter comprises a catheter body, a plurality of splines, a plurality of electrode rings and a plurality of ablation systems, wherein the splines are arranged at the far end of the catheter body, each spline comprises a protection tube and at least one electrode ring arranged on the protection tube, each electrode ring comprises a plurality of sub-electrodes arranged at intervals along the circumferential direction of the protection tube, and wires of the sub-electrodes are accommodated in the protection tube and are suitable for being electrically connected with the ablation systems.
Optionally, a plurality of insulating ribs are arranged on the protection tube at intervals along the circumferential direction of the protection tube to form a plurality of splicing positions, and a plurality of sub-electrodes are fixed on a plurality of splicing positions one by one to form the electrode ring.
Optionally, the electrode ring further includes an insulator disposed on the protection tube, and the plurality of sub-electrodes are uniformly disposed on the insulator at intervals to form the electrode ring.
Optionally, the insulator is an insulating sleeve or an insulating coating.
Optionally, the ablation catheter further comprises an inner tube, a shape control head and a frame, wherein the inner tube is partially inserted into the catheter body, the frame is composed of a plurality of protection tubes or comprises a plurality of memory alloy pieces respectively accommodated in the plurality of protection tubes, the shape control head is arranged at the distal end of the inner tube and sleeved and fixed at the end parts of the plurality of protection tubes, the shape control head is used for controlling the shape of the frame, and the inner tube and the catheter body can relatively move along the length direction of the ablation catheter.
To achieve the above object, the present invention also provides an ablation device including:
an ablation catheter, the ablation catheter being as described above; the ablation catheter includes: a catheter body; the plurality of splines are arranged at the far end of the catheter body, each spline comprises a protection tube and at least one electrode ring arranged on the protection tube, each electrode ring comprises a plurality of sub-electrodes arranged at intervals along the circumferential direction of the protection tube, and a lead wire of each sub-electrode is accommodated in the protection tube and is suitable for being electrically connected with an ablation system; and
and the ablation system is connected with the sub-electrode lead wire of the ablation catheter and is used for controlling the sub-electrode discharge.
Optionally, the ablation system includes an upper computer, a controller, a power module, an impedance detection module, a function switching module and a mapping module, wherein the upper computer is electrically connected with the controller, the power module and the impedance detection module are respectively electrically connected with the controller, and the function switching module is electrically connected with the impedance detection module;
the impedance detection module is used for testing the impedance between the sub-electrode and the reference electrode;
the function switching module is used for controlling the working state of the mapping module according to the control signal of the controller and selecting energy output, impedance detection or mapping;
the mapping module is used for collecting, receiving or inputting potential information and converting mapping electric signals.
In order to achieve the above object, the present invention further provides an ablation control method, based on the above ablation device, the ablation control method includes the following steps:
after the ablation catheter is contacted with the part to be ablated, testing the impedance between each sub-electrode and the reference electrode to obtain an impedance detection value;
judging the application state of each sub-electrode according to the impedance detection value;
closing the sub-electrode in a liquid surrounding state, and controlling the sub-electrode in a state of contacting with the part to be ablated to discharge.
Optionally, the reference electrode is an electrode on the ablation catheter at its proximal or distal end and in blood; the step of judging the application state of each sub-electrode according to the impedance detection value specifically comprises the following steps:
determining a sub-electrode corresponding to the impedance detection value being less than or equal to N times of an impedance threshold value of the reference electrode between blood as a liquid surrounding state; and determining the sub-electrode corresponding to the impedance detection value being larger than N times of the impedance threshold value of the reference electrode between the blood as a contact state with the part to be ablated.
Optionally, the reference electrode is any one of the sub-electrodes; the step of judging the application state of each sub-electrode according to the impedance detection value specifically includes:
after all the impedance detection values are acquired, the impedance detection values are sequentially arranged in the order from small to large: r1, R2, R3.
Taking the smallest impedance detection value as R0, and calculating the difference delta R between the impedance detection values of other sub-electrodes and R0;
determining the sub-electrode corresponding to the difference delta R smaller than or equal to a first threshold value as a liquid surrounding state; determining the sub-electrode corresponding to the difference delta R being larger than or equal to a second threshold value as a high fitting state with the part to be ablated; and determining the corresponding sub-electrode of which the difference delta R is between the first threshold value and the second threshold value to be in a low fitting state with the part to be ablated.
In the technical scheme of the invention, the ablation catheter comprises a catheter body and a plurality of splines, wherein the splines are arranged at the distal end of the catheter body, each spline comprises a protection tube and at least one electrode ring arranged on the protection tube, each electrode ring comprises a plurality of sub-electrodes arranged at intervals along the circumferential direction of the protection tube, and wires of the sub-electrodes are accommodated in the protection tube and are suitable for being electrically connected with an ablation system. Therefore, through the ablation catheter with the structure, each sub-electrode is connected with the ablation system, the sub-electrodes can be controlled to discharge independently according to different time sequences, and simultaneously discharge or not discharge, so that the energy of an ablation electric field is enabled to act on myocardial tissues more intensively, further, the loss and side effect of current in blood are effectively reduced, and the safety and the effectiveness of an ablation are greatly enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of an ablation catheter of the present invention;
FIG. 2 is a front view of one embodiment of an ablation catheter of the invention;
FIG. 3 is a side view of one embodiment of an ablation catheter of the invention;
FIG. 4 is a schematic view of the spline and electrode ring configuration of a first embodiment of the ablation catheter of the invention;
FIG. 5 is a front view of a spline and electrode ring of a first embodiment of an ablation catheter of the invention;
FIG. 6 is a cross-sectional view taken at A-A of FIG. 5;
FIG. 7 is a schematic illustration of the configuration of splines and electrode rings of a second embodiment of an ablation catheter of the invention;
FIG. 8 is a front view of a spline and electrode ring of a second embodiment of an ablation catheter of the invention;
FIG. 9 is a cross-sectional view taken at B-B of FIG. 8;
FIG. 10 is a schematic view of a spline and electrode ring configuration of a third embodiment of an ablation catheter of the invention;
FIG. 11 is a front view of a spline and electrode ring of a third embodiment of an ablation catheter of the invention;
FIG. 12 is a cross-sectional view taken at C-C of FIG. 11;
FIG. 13 is a block diagram of an ablation system in an embodiment of an ablation device of the invention;
FIG. 14 is a flow chart of an embodiment of an ablation control method of the ablation device of the invention;
FIG. 15 is a detailed flow chart of an embodiment of an ablation control method of the ablation device of the invention;
fig. 16 is a detailed flow chart of another embodiment of an ablation control method of the ablation device of the invention.
Reference numerals illustrate:
10. a catheter body; 20. a spline; 210. a protective tube; 220. an electrode ring; 221. a sub-electrode; 211. insulating ribs; 222. an insulator; 11. an inner tube; 12. a morphology control head; 310. an upper computer; 320. a controller; 330. a power module; 340. an impedance detection module; 350. a function switching module; 360. a mapping module; 370. and the audible and visual alarm module.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides an ablation catheter, relates to a system for treating arrhythmia by adopting a pulsed electric field ablation technology, and particularly relates to an ablation catheter for treating arrhythmia.
Referring to fig. 1 to 6, in an embodiment of the present invention, the ablation catheter includes a catheter body 10 and a plurality of splines 20, the plurality of splines 20 are disposed at a distal end of the catheter body 10, each spline 20 includes a protection tube 210 and at least one electrode ring 220 disposed on the protection tube 210, the electrode ring 220 includes a plurality of sub-electrodes 221 disposed at intervals along a circumferential direction of the protection tube 210, and wires of the sub-electrodes 221 are accommodated in the protection tube 210 and adapted to be electrically connected to an ablation system.
In this embodiment, the spline 20 is a branch of the catheter body 10, which may have a tubular structure, and the number of the spline may be one, two or more, which is not limited herein.
The electrode ring 220 may be composed of at least two sub-electrodes 221 in the shape of a sheet or a block, etc., and the sub-electrodes 221 may be assembled together in a spliced manner and separated by an insulating material or an insulating structure to avoid mutual interference. Of course, the sub-electrodes 221 may be mounted on an insulating member or embedded in an insulating material to form an integrated electrode ring 220, and the integrated electrode ring 220 is then sleeved on the protection tube 210. The specific structure of the electrode ring 220 is not limited here.
It can be understood that by adopting the ablation catheter with the structure, each sub-electrode 221 is connected with the ablation system, so that the sub-electrodes 221 can be controlled to be discharged independently according to different time sequences, and simultaneously discharged independently or not, so that the energy of an ablation electric field can be more intensively acted on myocardial tissues, further, the loss and side effect of current in blood are effectively reduced, and the safety and the effectiveness of the ablation are greatly enhanced.
In order to enhance the convenience of assembling the ablation catheter, referring mainly to fig. 4 to 6, in an embodiment, a plurality of insulation ribs 211 may be disposed on the protection tube 210 at intervals along the circumferential direction thereof to form a plurality of splicing sites, and a plurality of sub-electrodes 221 are fixed on the plurality of splicing sites one to form an electrode ring 220.
In this embodiment, the sub-electrodes 221 may be fixed at the splicing position by bonding or clamping, which is not limited herein.
Referring mainly to fig. 7 to 12, in other embodiments, the electrode ring 220 may further include an insulator 222 disposed on the protection tube 210, and the plurality of sub-electrodes 221 are uniformly spaced on the insulator 222 to form the electrode ring 220.
In this embodiment, the insulator 222 may be an insulating sleeve (as shown in fig. 7 to 9) or an insulating coating (as shown in fig. 10 to 12), which is not limited herein.
It will be appreciated that when the insulator 222 is an insulating sleeve, as shown in fig. 7 to 9, it is possible to implement separate batch processing of the electrode ring 220 and then to assemble it on the protection tube 210, which can effectively improve the production efficiency and reduce the manufacturing cost. As shown in fig. 10 to 12, when the insulator 222 is an insulating coating, its thickness is small, and the overall size of the spline 20 can be reduced.
Referring to fig. 1 to 3, in some embodiments, the ablation catheter may further include an inner tube 11, a shape control head 12, and a frame, wherein the inner tube 11 is partially inserted into the catheter body 10, the frame is formed by a plurality of protection tubes 210 or includes a plurality of memory alloy pieces respectively accommodated in the plurality of protection tubes 210, the shape control head 12 is disposed on a distal end of the inner tube 11 and is sleeved on an end of the plurality of protection tubes 210, and the shape control head 12 is used for controlling a shape of the frame.
In this embodiment, the inner tube 11 and the catheter body 10 can move relatively along the length direction of the ablation catheter.
The shape control head 12 is connected with the head of the frame, when the shape control head 12 moves, the inner tube 11 and the catheter body 10 relatively move, the shape change of the frame can be controlled, the shape of the frame can be changed from an initial tubular shape to a rugby shape or a ball shape, the maximum radius of the frame can be changed in the process so as to adapt to the pulmonary vein leaning of different sizes and shapes, the spline 20 of the ablation catheter can be better adapted to the ablation environment, and the sub-electrode 221 can be better attached to the part to be ablated or extend into the pulmonary vein for mapping and ablation, so that the effectiveness and the safety of the ablation operation can be further improved.
The present invention also proposes an ablation device comprising an ablation catheter, the specific structure of which refers to the above-mentioned embodiments, and since the ablation device proposed by the present invention comprises all the solutions of all the embodiments of the above-mentioned ablation catheter, it has at least the same technical effects as the above-mentioned ablation catheter, which are not explained herein.
Referring primarily to fig. 1, 6 and 13, in one embodiment of the present invention, the ablation device includes an ablation catheter and an ablation system, the ablation system is wire-connected to a sub-electrode 221 of the ablation catheter, and the ablation system is used to control the sub-electrode 221 to discharge.
To facilitate wiring, in this embodiment, the leads of the sub-electrodes 221 may be connected to the ablation system via a multi-way connector.
Referring mainly to fig. 13, in an embodiment, the ablation system may include a host computer 310, a controller 320, a power module 330, an impedance detection module 340, a function switching module 350, and a mapping module 360, where the host computer 310 is electrically connected to the controller 320, the power module 330 and the impedance detection module 340 are respectively electrically connected to the controller 320, and the function switching module 350 is electrically connected to the impedance detection module 340. Wherein, the impedance detection module 340 is used for testing the impedance between the sub-electrode 221 and the reference electrode; the function switching module 350 is configured to control an operation state of the mapping module 360 according to a control signal of the controller 320, and select energy output, impedance detection, or mapping; the mapping module 360 is configured to collect, receive or input potential information, and convert mapping electric signals.
In this embodiment, the upper computer 310 may be a computer, a notebook computer, a tablet computer, etc., and the controller 320 may be a MCU, a DSP, an FPGA, etc., which is not limited herein.
In addition, referring to fig. 13, the ablation system may further include an audible and visual alarm module 370, where the audible and visual alarm module 370 is electrically connected to the controller 320 and is configured to output an audible signal and a visual signal according to a control signal of the controller 320 in a special case, so as to further enhance the safety of the ablation procedure.
It can be appreciated that by adopting the above ablation system and working in combination with the ablation catheter, the impedance between each sub-electrode 221 and the reference electrode is tested, and the discharge work by the control electrode is automatically or manually realized, which is beneficial to enabling the energy of the ablation electric field to be more concentrated on myocardial tissue, reducing the loss and side effect of current in blood, and further enhancing the safety and effectiveness of the ablation.
The invention also provides an ablation control method based on the ablation device, mainly referring to fig. 14 and 15, the ablation control method comprises the following steps:
s10, after the ablation catheter is contacted with the part to be ablated, testing the impedance between each sub-electrode and the reference electrode to obtain an impedance detection value;
s20, judging the application state of each sub-electrode according to the impedance detection value;
and S30, closing the sub-electrode in the liquid surrounding state, and controlling the sub-electrode in the state of being in contact with the part to be ablated to discharge.
It should be noted that the reference electrode may be an electrode near the proximal end or the distal end of the ablation catheter, and the reference electrode is in the blood when performing the ablation; of course, the reference electrode may be any one of the sub-electrodes 221 on the spline 20 of the catheter body 10, in which case the sub-electrode 221 may be in the blood or in contact with atrial tissue.
In this embodiment, after the ablation catheter is contacted with the part to be ablated, the impedance between each sub-electrode 221 and the reference electrode is tested by the impedance analysis system of the ablation device, wherein the sub-electrode 221 with high impedance is in a state of being attached to the atrial wall, and the sub-electrode 221 with low impedance is in a state of being surrounded by liquid. The operator only needs to turn off the sub-electrode 221 surrounded by blood and discharge the sub-electrode 221 in contact with the site to be ablated.
It can be appreciated that by adopting the ablation control method, the energy of the ablation electric field can be more intensively acted on myocardial tissue, thereby effectively reducing the loss and side effect of current in blood and greatly enhancing the safety and effectiveness of the ablation.
Referring to fig. 14 and 15, in one embodiment, the reference electrode is an electrode on the ablation catheter proximal or distal to it and in the blood; the step S20 of determining the application state of each sub-electrode according to the impedance detection value specifically includes: determining a sub-electrode corresponding to the impedance detection value being less than or equal to N times of an impedance threshold value of the reference electrode between blood as a liquid surrounding state; and determining the sub-electrode corresponding to the impedance detection value being larger than N times of the impedance threshold value of the reference electrode between the blood as a contact state with the part to be ablated.
In this embodiment, N may be within a certain range, such as 1.2-1.4, or may be a specific value, such as 1.3, which is not limited herein.
In this case, the reference electrode is in the blood and the impedance between it and the other sub-electrodes 221 can be measured directly by the impedance analysis system. If the impedance value is less than or equal to N times the threshold value of the electrode between blood, then it is indicated that the sub-electrode 221 is in the blood and not in contact with the tissue; if the impedance is greater than N times this threshold, this sub-electrode 221 is illustrated with tissue application.
Referring mainly to fig. 14 and 15, in the present embodiment, in step S10, two steps of impedance measurement S11 and obtaining impedance data S12 are mainly included; in step S20, the method mainly includes two steps of comparing the impedance detection data with a blood threshold value S21 and determining whether the impedance detection data is greater than a blood threshold value S22 which is N times greater than the impedance detection data.
In another embodiment, referring to fig. 14 and 16, the reference electrode is any one of the sub-electrodes; the step S20 of determining the application state of each sub-electrode according to the impedance detection value specifically includes:
s221, after all the impedance detection values are acquired, sequentially arranging the following components in order from small to large: r1, R2, R3.
S222, taking the smallest impedance detection value as R0, and calculating the difference delta R between the impedance detection values of other sub-electrodes and R0;
s223, determining the sub-electrode corresponding to the difference delta R smaller than or equal to the first threshold value as a liquid surrounding state; determining the sub-electrode corresponding to the difference delta R being larger than or equal to a second threshold value as a high fitting state with the part to be ablated; and determining the corresponding sub-electrode of which the difference delta R is between the first threshold value and the second threshold value to be in a low fitting state with the part to be ablated.
In this case, the reference electrode is any one of the sub-electrodes 221 on the catheter spline 20, and the sub-electrode 221 may be in the blood or in contact with atrial tissue. The impedance of the sub-electrode 221 will vary much more than if the reference electrode were in the blood alone. The invention deduces the contact condition of the electrode by adopting a new algorithm. First, all the tested impedances were sized to give an order of R1, R2, R3. The minimum impedance is taken as R0, and the difference delta R between the impedance value of the other sub-electrodes 221 and R0 is used for judging the method of electrode leaning. By adopting the algorithm, the change and error caused by the reference electrode and blood or tissue can be avoided, and the judgment of the application state of the sub-electrode 311 is more accurate.
Specifically, the first threshold may be 10Ω, and when the difference Δr is less than or equal to 10Ω, it is indicated that the sub-electrode 221 is in the liquid-surrounding state. The second threshold may be 30Ω, and when the difference Δr is greater than or equal to 30Ω, it indicates that the corresponding sub-electrode 221 is in a high fitting state with the portion to be ablated. When the difference Δr is between 10Ω and 30Ω, it indicates that the corresponding sub-electrode 221 is in a low fitting state with the portion to be ablated.
In practical experiments, the sub-electrodes 221 in the low bonding state with the to-be-ablated region and the high bonding state with the to-be-ablated region have no significant difference, and the average treatment effect of the sub-electrodes 221 in the liquid surrounding state is significantly smaller than that of the sub-electrodes 221 in the low bonding state with the to-be-ablated region and the high bonding state with the to-be-ablated region. For the atrial line, the sub-electrode 221 in a low-fitting state with the part to be ablated and a high-fitting state with the part to be ablated achieve acute conduction block, while the sub-electrode 221 in a liquid-surrounding state marks the conduction gap by electro-dissection.
Furthermore, it should be noted that, in use, the impedance test interface of the ablation system may display the location (application state), serial number, and measured impedance value of each sub-electrode 221. The doctor can directly select the reference electrode at the interface, the ablation system can automatically calculate the impedance difference delta R between the electrodes, give different conditions of the sub-electrodes 221 according to the variation range of the difference delta R, and automatically display the leaning property of the catheter (for example, the sub-electrodes 221 are respectively indicated to be leaning against the tissue in black and are respectively indicated to be in red in blood), and the ablation system can automatically control the leaning electrodes to be electrified and close the electrodes in the blood. Meanwhile, the doctor can manually adjust the switch of the discharge electrode 311 on the artificial intelligent interface.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (8)
1. An ablation device, comprising:
the ablation catheter comprises a catheter body, a plurality of splines, an inner tube, a form control head and a frame, wherein the splines are arranged at the far end of the catheter body, each spline comprises a protection tube and at least one electrode ring arranged on the protection tube, each electrode ring comprises a plurality of sub-electrodes arranged at intervals along the circumferential direction of the protection tube, and a lead wire of each sub-electrode is accommodated in the protection tube and is suitable for being electrically connected with an ablation system; the inner tube part is inserted into the catheter body, the frame is composed of a plurality of protection tubes or comprises a plurality of memory alloy pieces which are respectively accommodated in the plurality of protection tubes, the shape control head is arranged on the distal end of the inner tube and sleeved and fixed on the end parts of the plurality of protection tubes, the shape control head is used for controlling the shape of the frame, and the inner tube and the catheter body can relatively move along the length direction of the ablation catheter; and
the ablation system is connected with the sub-electrode lead of the ablation catheter and comprises an impedance detection module, the impedance detection module is used for testing the impedance between the sub-electrode and the reference electrode to obtain an impedance detection value, the ablation system judges the application state of each sub-electrode according to the impedance detection value, controls the sub-electrode in a state of being in contact with a part to be ablated to discharge, and closes the sub-electrode in a liquid surrounding state.
2. The ablation device of claim 1, wherein a plurality of insulating ribs are provided on the protective tube at intervals along the circumferential direction thereof to form a plurality of splice sites, and a plurality of the sub-electrodes are fixed to a plurality of the splice sites one-to-one to constitute the electrode ring.
3. The ablation device of claim 1, wherein the electrode ring further comprises an insulator disposed on the protective tube, the plurality of sub-electrodes being spaced uniformly on the insulator to form the electrode ring.
4. The ablation device of claim 3, wherein the insulator is an insulating sleeve or an insulating coating.
5. The ablation device of claim 1, wherein the ablation system further comprises a host computer, a controller, a power module, a function switching module, and a mapping module, the host computer being electrically connected to the controller, the power module and the impedance detection module being respectively electrically connected to the controller, the function switching module being electrically connected to the impedance detection module;
the function switching module is used for controlling the working state of the mapping module according to the control signal of the controller and selecting energy output, impedance detection or mapping;
the mapping module is used for collecting, receiving or inputting potential information and converting mapping electric signals.
6. The ablation device of claim 1, wherein the method of controlling the ablation device comprises the steps of:
after the ablation catheter is contacted with the part to be ablated, testing the impedance between each sub-electrode and the reference electrode to obtain an impedance detection value;
judging the application state of each sub-electrode according to the impedance detection value;
closing the sub-electrode in a liquid surrounding state, and controlling the sub-electrode in a state of contacting with the part to be ablated to discharge.
7. The ablation device of claim 6, wherein the reference electrode is an electrode on the ablation catheter proximal or distal thereto and in blood; the step of judging the application state of each sub-electrode according to the impedance detection value specifically comprises the following steps:
determining a sub-electrode corresponding to the impedance detection value being less than or equal to N times of an impedance threshold value of the reference electrode between blood as a liquid surrounding state; and determining the sub-electrode corresponding to the impedance detection value being larger than N times of the impedance threshold value of the reference electrode between the blood as a contact state with the part to be ablated.
8. The ablation device of claim 6, wherein the reference electrode is any of the sub-electrodes; the step of judging the application state of each sub-electrode according to the impedance detection value specifically includes:
after all the impedance detection values are acquired, the impedance detection values are sequentially arranged in the order from small to large: r1, R2, R3.
Taking the smallest impedance detection value as R0, and calculating the difference delta R between the impedance detection values of other sub-electrodes and R0;
determining the sub-electrode corresponding to the difference delta R smaller than or equal to a first threshold value as a liquid surrounding state; determining the sub-electrode corresponding to the difference delta R being larger than or equal to a second threshold value as a high fitting state with the part to be ablated; and determining the corresponding sub-electrode of which the difference delta R is between the first threshold value and the second threshold value to be in a low fitting state with the part to be ablated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311197938.2A CN116919563B (en) | 2023-09-18 | 2023-09-18 | Ablation catheter, ablation device and ablation control method of ablation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311197938.2A CN116919563B (en) | 2023-09-18 | 2023-09-18 | Ablation catheter, ablation device and ablation control method of ablation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116919563A CN116919563A (en) | 2023-10-24 |
| CN116919563B true CN116919563B (en) | 2024-01-16 |
Family
ID=88390034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311197938.2A Active CN116919563B (en) | 2023-09-18 | 2023-09-18 | Ablation catheter, ablation device and ablation control method of ablation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116919563B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110267586A (en) * | 2017-02-10 | 2019-09-20 | 圣犹达医疗用品心脏病学部门有限公司 | For determining the method and system of the illness rate of heart phenomenon |
| CN112040861A (en) * | 2018-04-05 | 2020-12-04 | 圣犹达医疗用品心脏病学部门有限公司 | High-density electrode mapping catheter |
| CN113331941A (en) * | 2021-07-01 | 2021-09-03 | 上海捍宇医疗科技股份有限公司 | Bipolar adjustable punctiform ablation catheter and equipment thereof |
| CN115737108A (en) * | 2022-11-25 | 2023-03-07 | 梅达沃科技(上海)有限公司 | Directional electrode ablation catheter and ablation system for ablation of atrial fibrillation in heart |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2969129A1 (en) * | 2014-12-03 | 2016-06-09 | Metavention, Inc. | Systems and methods for modulating nerves or other tissue |
-
2023
- 2023-09-18 CN CN202311197938.2A patent/CN116919563B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110267586A (en) * | 2017-02-10 | 2019-09-20 | 圣犹达医疗用品心脏病学部门有限公司 | For determining the method and system of the illness rate of heart phenomenon |
| CN112040861A (en) * | 2018-04-05 | 2020-12-04 | 圣犹达医疗用品心脏病学部门有限公司 | High-density electrode mapping catheter |
| CN113331941A (en) * | 2021-07-01 | 2021-09-03 | 上海捍宇医疗科技股份有限公司 | Bipolar adjustable punctiform ablation catheter and equipment thereof |
| CN115737108A (en) * | 2022-11-25 | 2023-03-07 | 梅达沃科技(上海)有限公司 | Directional electrode ablation catheter and ablation system for ablation of atrial fibrillation in heart |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116919563A (en) | 2023-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6517277B2 (en) | Real-time feedback of electrode contacts during mapping | |
| US9757191B2 (en) | Electrophysiology system and methods | |
| EP0904739B1 (en) | Apparatus determining electrode/tissue contact | |
| JP4166281B2 (en) | Multiple electrode excision catheter | |
| US6099524A (en) | Electrophysiological mapping and ablation catheter and method | |
| JP2017529169A (en) | Tissue diagnosis and treatment using mini-electrodes | |
| JP2002065626A (en) | Multi-electrode catheter, system and method | |
| US20140180147A1 (en) | Estimating interspline distances on mapping catheters | |
| CN112869874A (en) | Electrode device, medical catheter and ablation system | |
| CN115349944A (en) | Pulse ablation system | |
| CN115363744A (en) | Pulse ablation catheter and pulse ablation system | |
| CN116919563B (en) | Ablation catheter, ablation device and ablation control method of ablation device | |
| CN219109720U (en) | Double-pole electric coagulation forceps adapter | |
| CN114711958B (en) | Multipolar ablation device for pulsed electric field | |
| CN115944272A (en) | Measuring tissue proximity of multi-electrode catheters | |
| CN212661918U (en) | Medical catheter | |
| CN115590608A (en) | Ablation and mapping by a single multi-electrode catheter | |
| CN219579013U (en) | Pulse ablation catheter and pulse ablation system | |
| CN215651499U (en) | Medical catheter and medical catheter system | |
| CN116942292B (en) | Ablation catheter, ablation device and ablation method thereof | |
| CN219147897U (en) | Novel multi-electrode spline basket ablation catheter | |
| CN219089614U (en) | A lean on equipment for judging electrode is leaned on condition | |
| CN215651496U (en) | Electrode device, medical catheter and ablation system | |
| WO2023026346A1 (en) | Catheter system | |
| CN116919574A (en) | Ablation device, impedance detection method and pulsed electric field ablation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |