Ablation system and method for determining attachment length

Abstract

The invention discloses an ablation system and a method for determining the attaching length, and the system comprises an ablation catheter which comprises a mandrel, an ablation electrode, a pushing part, an operation handle and a displacement sensor, and the displacement sensor is used for collecting the real-time displacement distance of the mandrel relative to the operation handle; the control host is electrically connected with the displacement sensor and used for determining the real-time attaching length of the ablation electrode and the trachea according to the diameter of the trachea and the real-time displacement distance collected by the displacement sensor and determining a real-time attaching state diagram of the ablation electrode and the trachea according to the real-time attaching length; the displayer is electrically connected with the control host and used for displaying the real-time attaching state diagram and the real-time attaching length. The ablation system provided by the invention can improve the effectiveness of treatment.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an ablation system and a method for determining an abutment length. Background Art

[0002] Pulsed field ablation (PFA) is a new and effective interventional ablation treatment method. Its ablation principle is to apply intermittent high-intensity pulsed electric fields in a very short period of time, causing irreversible damage to the cell membrane through electroporation and death. For ablation treatment of different lesions, the lesion can be accurately ablated by using adapted ablation electrodes, reducing the loss of electric field energy and improving the ablation treatment effect.

[0003] Chronic obstructive pulmonary disease (COPD) is a common chronic disease characterized by chronic bronchitis and / or emphysema with airflow obstruction, which can further develop into cor pulmonale and respiratory failure. It is related to abnormal inflammatory response to harmful gases and particles, and has high disability and mortality rates.

[0004] Pulsed electric field ablation is an effective way to treat chronic obstructive pulmonary disease. However, there is currently a certain degree of difficulty in operating the ablation catheter to ablate the target area, and the effectiveness of the treatment needs to be further improved. Summary of the invention

[0005] The present application provides an ablation system and a method for determining an abutment length, which can improve the effectiveness of treatment.

[0006] A first aspect of an embodiment of the present application provides an ablation system, which includes: an ablation catheter, including a core shaft, an ablation electrode connected to the distal end of the core shaft, a pushing piece connected to the proximal end of the core shaft, an operating handle slidably connected to the pushing piece, and a displacement sensor, wherein the ablation electrode expands or contracts as the core shaft moves in the axial direction; the displacement sensor is used to collect the real-time displacement distance of the core shaft relative to the operating handle; a control host is electrically connected to the displacement sensor, and is used to determine the real-time contact length between the ablation electrode and the trachea according to the diameter of the trachea and the real-time displacement distance collected by the displacement sensor, and determine the real-time contact status diagram between the ablation electrode and the trachea according to the real-time contact length; a display is electrically connected to the control host, and is used to display the real-time contact status diagram and the real-time contact length.

[0007] A second aspect of an embodiment of the present application provides a method for determining a contact length, the method comprising: obtaining a real-time displacement distance of a core shaft in an ablation catheter relative to an operating handle, wherein the distal end of the core shaft is connected to an ablation electrode, and the proximal end is connected to a pushing member, the pushing member is slidably connected to the operating handle, and the ablation electrode expands or contracts as the core shaft moves in an axial direction; obtaining the diameter of the trachea; and determining the real-time contact length between the ablation electrode and the trachea based on the real-time displacement distance and the diameter of the trachea.

[0008] The beneficial effect is: the present application sets a displacement sensor in the ablation catheter, uses the displacement sensor to collect the real-time displacement distance of the core shaft relative to the operating handle, and determines the real-time contact length of the ablation electrode and the trachea according to the diameter of the trachea and the real-time displacement distance collected by the displacement sensor, and then determines the real-time contact status diagram of the ablation electrode and the trachea according to the real-time contact length, and finally displays the real-time contact status diagram and the real-time contact length on the display. On the one hand, it can avoid deformation of the ablation electrode in the body caused by excessive pushing of the push part, and on the other hand, it can also allow the operator to give a corresponding number of ablations according to the real-time contact length of the ablation electrode and the trachea, thereby increasing the effectiveness of the treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0010] Figure 1 It is a structural schematic diagram of an implementation method of the ablation system of the present application;

[0011] Figure 2 It is a schematic diagram of the real-time contact state of the ablation electrode and the trachea;

[0012] Figure 3 yes Figure 1 A schematic structural diagram of an embodiment of an ablation catheter;

[0013] Figure 4 It is a flow chart of an implementation method of a method for determining the abutment length of the present application;

[0014] Figure 5 This is a structural diagram of an implementation method of a control host of the present application;

[0015] Figure 6 It is a structural schematic diagram of an implementation method of a computer-readable storage medium of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] It should be noted that the terms "first" and "second" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0018] In the present invention, "distal" and "proximal" are used as directional terms, which are commonly used terms in the field of interventional medical devices, where "distal" refers to the end away from the operator during surgery, and "proximal" refers to the end close to the operator during surgery. "Axial" refers to the direction parallel to the line connecting the distal center and the proximal center of the medical device; "radial" refers to the direction perpendicular to the above "axial".

[0019] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of an embodiment of an ablation system of the present application. The ablation system includes an ablation catheter 110 , a control host 120 and a display 130 .

[0020] The ablation catheter 110 includes a core shaft 111, an ablation electrode 112 connected to the distal end of the core shaft 111, a pushing member 113 connected to the proximal end of the core shaft 111, and an operating handle 114 slidably connected to the pushing member 113. The pushing member 113 is used to drive the core shaft 111 to move axially relative to the operating handle 114, and the ablation electrode 112 expands or contracts as the core shaft 111 moves axially. Specifically, as the core shaft 111 moves away from the operating handle 114 in the axial direction, the ablation electrode 112 expands, and as the core shaft 111 moves axially toward the operating handle 114, the ablation electrode 112 contracts.

[0021] Specifically, the core shaft 111 extends in the axial direction of the ablation catheter 110, and the ablation electrode 112 is an electrode of the ablation catheter 110, also called a single electrode, which is used to receive a pulse ablation signal to generate a pulse ablation electric field, causing irreversible damage to the cell membrane due to electroporation and death, thereby achieving the purpose of ablation. In one embodiment, the ablation electrode 112 is a woven basket structure, which can expand or contract in the radial direction. At the same time, the pusher 113 is slidably connected to the operating handle 114. During the operation, when the operator pushes the pusher 113 toward the distal end, the ablation electrode 112 moves toward the distal end under the drive of the pusher 113 and the core shaft 111. When the operator pulls the pusher 113 toward the proximal end, the ablation electrode 112 moves toward the proximal end under the drive of the core shaft 111. At the same time, as the ablation electrode 112 moves toward the distal end, the ablation electrode 112 gradually expands in the radial direction, that is, the ablation electrode 112 is gradually released, and as the ablation electrode 112 moves toward the proximal end, the ablation electrode 112 gradually contracts in the radial direction.

[0022] In one embodiment, in the initial state (when the operator does not push the pushing member 113 to the distal end), the ablation electrode 112 remains in a contracted state, and its outer diameter remains at about 3 mm. When the pushing member 113 slides to the extreme position at the distal end, the ablation electrode 112 is completely released to form a balloon-like state with an outer diameter of 20 to 30 mm.

[0023] See also Figure 2 , Figure 2 The state of the ablation electrode 112 in the trachea 20 is shown. During the treatment process, the ablation electrode 112 can be loaded into the endoscope, and the ablation electrode 112 can be sent to the target treatment area in the trachea 20 through the endoscope, and then the ablation electrode 112 is extended from the endoscope to ablate the target tissue, wherein the endoscope can only reach the 4th level of the bronchus, and then the bronchi above the 5th level can only be entered and ablated by the ablation catheter 110 itself. During the entire treatment process, the telescopic state of the proximal end (the end close to the operator) of the ablation electrode 112 can only be roughly checked through the field of view under the endoscope, and the telescopic state of the distal end of the ablation electrode 112 cannot be identified. After the operator releases the ablation electrode 112 through the push piece 113, the ablation electrode 112 cannot give the operator deformation feedback, which makes it easy for the operator to be unable to distinguish the real-time degree of contact between the ablation electrode 112 and the trachea 20, so that the operator cannot accurately give the number of ablations, which increases the difficulty of ablation.

[0024] In order to avoid the above problems, please refer to Figure 1 and Figure 2In the present application, the ablation catheter 110 is further provided with a displacement sensor 115, and the displacement sensor 115 is used to collect the real-time displacement distance of the core shaft 111 relative to the operating handle 114. At the same time, the control host 120 is electrically connected to the displacement sensor 115 (which can be electrically connected through a signal line 10), and is used to determine the real-time contact length L1 between the ablation electrode 112 and the trachea 20 according to the real-time displacement distance collected by the displacement sensor 115 and the diameter D of the trachea 20.

[0025] Specifically, after the ablation electrode 112 enters the trachea 20, no matter how the ablation electrode 112 expands, the diameter D of the trachea 20 remains unchanged, or changes very little and can be ignored, and the real-time contact length L1 between the ablation electrode 112 and the trachea 20 is determined by the expansion degree of the ablation electrode 112 and the diameter D of the trachea 20. Specifically, for the same trachea 20, before the outer peripheral surface of the ablation electrode 112 contacts the wall of the trachea 20, the real-time contact length L1 between the ablation electrode 112 and the trachea 20 is equal to 0. After the ablation electrode 112 expands until the outer circumference of the ablation electrode 112 contacts the wall of the trachea 20, as the ablation electrode 112 expands more and more, the real-time contact length L1 between the ablation electrode 112 and the trachea 20 becomes larger and larger until the ablation electrode 112 expands to the limit state; and for different tracheas 20, after the outer circumference of the ablation electrode 112 contacts the wall of the trachea 20, under the same expansion degree of the ablation electrode 112, the smaller the diameter D of the trachea 20, the larger the real-time contact length L1 between the ablation electrode 112 and the trachea 20.

[0026] As can be seen from the above, the expansion degree of the ablation electrode 112 depends on the displacement distance of the core shaft 111 relative to the operating handle 114. Specifically, in the initial state, the displacement distance of the core shaft 111 relative to the operating handle 114 is 0. As the core shaft 111 moves toward the distal end relative to the operating handle 114, the displacement distance of the core shaft 111 relative to the operating handle 114 becomes larger and larger, and the ablation electrode 112 also expands more and more. Therefore, the expansion degree of the ablation electrode 112 is related to the real-time displacement distance of the core shaft 111 relative to the operating handle 114. Therefore, the real-time contact length L1 of the ablation electrode 112 and the trachea 20 is indirectly related to the real-time displacement distance of the core shaft 111 relative to the operating handle 114.

[0027] Therefore, the control host 120 can determine the real-time contact length L1 between the ablation electrode 112 and the trachea 20 according to the real-time displacement distance collected by the displacement sensor 115 and the diameter D of the trachea 20. The specific process of determining the real-time contact length L1 can be found in the following description.

[0028] After obtaining the real-time abutment length L1, the control host 120 can also generate a real-time abutment status diagram of the ablation electrode 112 and the trachea 20 according to the real-time abutment length L1, and finally the display 130 electrically connected to the control host 120 displays the real-time abutment status diagram and the real-time abutment length L1.

[0029] Therefore, during the treatment process, the operator can adjust the number of ablations through the real-time sticking state diagram and the real-time sticking length L1 presented on the display 130 to increase the effectiveness of the treatment.

[0030] In one embodiment, the control host 120 may be integrated into the pulse ablation host. In addition to the control host 120 , the pulse ablation host may also be integrated with a pulse device for generating a pulse ablation signal and sending the pulse ablation signal to the ablation electrode 112 .

[0031] The displacement sensor 115 may be a contact displacement sensor or a non-contact displacement sensor. The contact displacement sensor is usually in direct contact with the object to be measured and works by measuring the displacement of the object, while the non-contact displacement sensor does not directly contact the object to be measured and senses the displacement by measuring changes in electromagnetic fields, optics or other physical phenomena. The working principle of the displacement sensor 115 may be capacitive, eddy current or laser. The capacitive displacement sensor measures the distance by using changes in capacitance; the eddy current displacement sensor measures the distance by using changes in magnetic fields; and the laser displacement sensor measures the distance by emitting lasers and measuring changes in reflected lasers.

[0032] Among them, when the displacement sensor 115 is a contact displacement sensor, the displacement sensor 115 can be a potentiometer displacement sensor, which senses displacement by measuring changes in resistance, and its movable brush is connected to the object to be measured. When the object moves, the position of the brush changes, resulting in changes in resistance value, thereby outputting a corresponding electrical signal. When the displacement sensor 115 is a non-contact displacement sensor, the displacement sensor 115 can be a Hall-type or photoelectric displacement sensor. The Hall-type displacement sensor uses the principle of the Hall effect to sense displacement by measuring changes in the magnetic field; the photoelectric displacement sensor uses the photoelectric effect to sense displacement by measuring changes in light signals.

[0033] In one embodiment, in combination Figure 1 as well as Figure 3 The operating handle 114 is provided with a receiving cavity 1141, the proximal end of the mandrel 111 extends into the receiving cavity 1141, and the displacement sensor 115 is located in the receiving cavity 1141. This arrangement can protect the displacement sensor 115 by using the operating handle 114, and can also ensure the accuracy of the signal collected by the displacement sensor 115.

[0034] However, in other embodiments, the displacement sensor 115 may also be disposed on the outer surface of the operating handle 114 , or may also be disposed on the core shaft 111 , the ablation electrode 112 or the pusher 113 . In short, the present application does not limit the type or the location of the displacement sensor 115 .

[0035] Continue reading Figure 3 In one embodiment, the displacement sensor 115 includes a sensing end 1151 and a collecting end 1152, wherein one of the sensing end 1151 and the collecting end 1152 is connected to the operating handle 114, and the other is connected to the mandrel 111. The sensing end 1151 may be connected to the operating handle 114, and the collecting end 1152 may be connected to the mandrel 111, or the sensing end 1151 may be connected to the mandrel 111, and the collecting end 1152 may be connected to the operating handle 114. For the sake of convenience, the scheme is introduced by taking the sensing end 1151 connected to the operating handle 114, and the collecting end 1152 connected to the mandrel 111 as an example:

[0036] As the collection end 1152 moves relative to the sensing end 1151, the sensing end 1151 generates a sensing signal indicating the displacement distance between the collection end 1152 and the sensing end 1151, and sends the signal to the control host 120. Since the collection end 1152 is connected to the core shaft 111, the displacement distance between the sensing end 1151 and the collection end 1152, that is, the displacement distance of the core shaft 111 relative to the operating handle 114, is achieved.

[0037] In one embodiment, in combination Figure 1 and Figure 2 , the control host 120 determines the diameter D of the air pipe 20 through the following steps:

[0038] S121: When it is detected that the impedance between the ablation electrode 112 and the trachea 20 decreases, the maximum expansion diameter H of the ablation electrode 112 at the current moment is determined according to the real-time displacement distance collected by the displacement sensor 115 at the current moment.

[0039] S122: Determine the diameter D of the trachea 20 according to the maximum expansion diameter H at the current moment.

[0040] Specifically, before the outer circumference of the ablation electrode 112 contacts the wall of the trachea 20, the impedance between the ablation electrode 112 and the trachea 20 remains unchanged. Once the outer circumference of the ablation electrode 112 contacts the wall of the trachea 20, the impedance between the ablation electrode 112 and the trachea 20 suddenly decreases. Therefore, when the impedance between the ablation electrode 112 and the trachea 20 is detected to decrease, it means that the outer circumference of the ablation electrode 112 just contacts the wall of the trachea 20 at the current moment. Therefore, the maximum expansion diameter H of the ablation electrode 112 at the current moment is equal to the diameter D of the trachea 20.

[0041] Among them, in order to reduce misjudgment and improve accuracy, step S121 can also determine the maximum expansion diameter H of the ablation electrode 112 at the current moment according to the real-time displacement distance collected by the displacement sensor 115 at the current moment when the amplitude of the impedance reduction between the ablation electrode 112 and the trachea 20 is greater than the amplitude threshold.

[0042] In other embodiments, the diameter D of the trachea 20 may also be determined by other means, for example, by using images captured by an endoscope. Specifically, the endoscope captures images of the trachea 20 while delivering the ablation electrode 112 to the target position, and then controls the host 120 to determine the diameter of the trachea 20 using an image processing algorithm based on the images captured by the endoscope.

[0043] In one embodiment, step S122 specifically includes: determining the maximum expansion diameter H of the ablation electrode 112 at the current moment according to a pre-established correspondence between the real-time displacement distance and the maximum expansion diameter H.

[0044] Specifically, a correspondence between the real-time displacement distance of the displacement sensor 115 and the maximum expansion diameter H of the ablation electrode 112 is established in advance and saved in a database. After obtaining the real-time displacement distance at the current moment, the maximum expansion diameter H corresponding to the real-time displacement distance at the current moment is searched in the correspondence in the database, and based on the maximum expansion diameter H found, the maximum expansion diameter H of the ablation electrode 112 at the current moment is determined.

[0045] Among them, when searching for the maximum expansion diameter H corresponding to the real-time displacement distance at the current moment in the corresponding relationship in the database, if the real-time displacement distance at the current moment exists in the database, the maximum expansion diameter H corresponding to the real-time displacement distance at the current moment in the database can be directly determined as the maximum expansion diameter H of the ablation electrode 112 at the current moment. However, if the real-time displacement distance at the current moment does not exist in the database, the real-time displacement distance closest to the real-time displacement distance at the current moment can be searched, and the maximum expansion diameter H corresponding to the real-time displacement distance can be determined as the maximum expansion diameter H of the ablation electrode 112 at the current moment, or if the real-time displacement distance at the current moment does not exist in the database, the first displacement distance and the second displacement distance set adjacent to the real-time displacement distance at the current moment can be searched, the first displacement distance is greater than the real-time displacement distance at the current moment, and the second displacement distance is less than the real-time displacement distance at the current moment, and then the maximum expansion diameter H of the ablation electrode 112 at the current moment is determined by interpolation according to the maximum expansion diameter H corresponding to the first displacement distance and the maximum expansion diameter H corresponding to the second displacement distance in the database.

[0046] It should be noted that in other embodiments, the mathematical relationship between the real-time displacement distance and the maximum expansion diameter H can also be pre-fitted, and then the real-time displacement distance at the current moment is substituted into the mathematical relationship to obtain the maximum expansion diameter H of the ablation electrode 112 at the current moment.

[0047] In one embodiment, in combination Figure 1 and Figure 2 , the control host 120 determines the real-time sticking length L1 through the following steps:

[0048] S131: Substitute the real-time displacement distance and the diameter D of the trachea 20 into the pre-fitted mathematical relationship to obtain the real-time contact length L1 between the ablation electrode 112 and the trachea 20 .

[0049] Specifically, a mathematical relationship between the real-time displacement distance of the displacement sensor 115, the diameter D of the trachea 20, and the real-time contact length L1 is pre-fitted, and the independent variables of the mathematical relationship are the real-time displacement distance of the displacement sensor 115 and the diameter D of the trachea 20, and the dependent variable is the real-time contact length L1. Therefore, during use, the real-time displacement distance and the diameter D of the trachea 20 are substituted into the mathematical relationship to obtain the real-time contact length L1 between the ablation electrode 112 and the trachea 20.

[0050] In another embodiment, in combination Figure 1 and Figure 2 , the control host 120 determines the real-time sticking length L1 through the following steps:

[0051] S132: Determine the real-time contact length L1 between the ablation electrode 112 and the trachea 20 according to the pre-established correspondence between the real-time displacement distance, the diameter D of the trachea 20 and the real-time contact length L1.

[0052] Specifically, a correspondence between the real-time displacement distance of the displacement sensor 115, the diameter D of the trachea 20 and the real-time abutment length L1 is established in advance, and the corresponding relationship is saved in a database. Then, during the processing, the real-time abutment length L1 that corresponds to the real-time displacement distance and the diameter D of the trachea 20 is searched in the corresponding relationship in the database to obtain the real-time abutment length L1 at the current moment.

[0053] Among them, when searching, if the real-time displacement distance and the diameter D of the trachea 20 do not exist in the database, the distance closest to the search and the real-time displacement distance, and the diameter closest to the diameter D of the trachea 20 can be used, and the real-time contact length L1 corresponding to the nearest distance and the closest diameter can be determined as the real-time contact length L1 between the ablation electrode 112 and the trachea 20 at the current moment.

[0054] In one embodiment, in combination Figure 1 and Figure 2 , the control host 120 generates a real-time sticking state diagram of the ablation electrode 112 and the trachea 20 through the following steps:

[0055] S141 : Determine the real-time expansion state of the ablation electrode 112 according to the real-time displacement distance collected by the displacement sensor 115 and the diameter D of the trachea 20 .

[0056] S142: Generate a real-time contact state diagram of the ablation electrode 112 and the trachea 20 according to the real-time expansion state of the ablation electrode 112, the diameter of the trachea 20, and the real-time contact length L1.

[0057] Specifically, the real-time expansion state of the ablation electrode 112 includes parameters such as the real-time axial length L2 of the ablation electrode 112 and the diameter of various locations of the ablation electrode 112 .

[0058] From the foregoing content, it can be seen that the greater the real-time displacement distance of the core shaft 111 relative to the operating handle 114, the more expanded the ablation electrode 112 is. At the same time, since the ablation electrode 112 is in the trachea 20, the real-time expansion state of the ablation electrode 112 is also related to the diameter of the trachea 20. Therefore, the real-time expansion state of the ablation electrode 112 can be determined based on the real-time displacement distance collected by the displacement sensor 115 and the diameter of the trachea 20.

[0059] Finally, after obtaining the real-time expansion state of the ablation electrode 112 , the diameter D of the trachea 20 , and the real-time contact length L1 , a real-time contact state diagram of the ablation electrode 112 and the trachea 20 can be drawn.

[0060] It should be noted that, in other embodiments, the specific process of determining the real-time adhesion status diagram of the ablation electrode 112 and the trachea 20 based on the real-time adhesion length L1 can also be: retrieving the image corresponding to the real-time adhesion length L1 from the images pre-saved in the database, and using the image as the real-time adhesion status diagram of the ablation electrode 112 and the trachea 20. That is to say, multiple images are saved in the database in advance, and each image corresponds to a real-time adhesion length L1. When retrieving, if the real-time adhesion length L1 exists in the database, the real-time adhesion status diagram corresponding to the real-time adhesion length L1 can be directly retrieved, but if the real-time adhesion length L1 does not exist in the database, the adhesion length closest to the real-time adhesion length L1 is found, and the image corresponding to the closest adhesion length is determined as the real-time adhesion status diagram, or the first adhesion length and the second adhesion length on both sides of the real-time adhesion length L1 can be found (one of the first adhesion length and the second adhesion length is greater than the real-time adhesion length L1, and the other is less than the real-time adhesion length L1), and then the real-time adhesion status diagram corresponding to the real-time adhesion length L1 is determined according to the image corresponding to the first adhesion length and the image corresponding to the second adhesion length in the database.

[0061] In one embodiment, the specific process of step S141 is: according to the pre-established correspondence, determine the real-time expansion state of the ablation electrode 112, specifically, in the pre-established correspondence between the real-time displacement distance, the diameter D of the trachea 20 and the expansion state of the ablation electrode 112, search for the real-time expansion state of the ablation electrode 112 that corresponds to both the real-time displacement distance and the diameter D of the trachea 20. The search process is similar to the above-mentioned process of searching for the real-time contact length L1, and the details can be referred to the above-mentioned related content, which will not be repeated here.

[0062] See also Figure 4 , Figure 4 : is a flow chart of an implementation method of a method for determining the abutment length of the present application, the method comprising:

[0063] S110: Acquire the real-time displacement distance of the core shaft in the ablation catheter relative to the operating handle.

[0064] The distal end of the core shaft is connected to the ablation electrode, and the proximal end is connected to the pushing member, and the pushing member is slidably connected to the operating handle. The ablation electrode expands or contracts as the core shaft moves in the axial direction.

[0065] S120: Obtain the diameter of the trachea.

[0066] S130: Determine the real-time contact length between the ablation electrode and the trachea according to the real-time displacement distance and the diameter of the trachea.

[0067] In one implementation, step S120 specifically includes:

[0068] S121: When it is detected that the impedance between the ablation electrode and the trachea decreases, the real-time displacement distance collected by the displacement sensor at the current moment is obtained.

[0069] S122: Determine the maximum expansion diameter of the ablation electrode at the current moment according to the real-time displacement distance collected by the displacement sensor at the current moment.

[0070] S123: Determine the diameter of the trachea according to the maximum expansion diameter.

[0071] In one embodiment, step S122 includes: determining the maximum expansion diameter of the ablation electrode at the current moment according to a pre-established correspondence between the real-time displacement distance and the maximum expansion diameter.

[0072] In one embodiment, step S130 includes: substituting the real-time displacement distance and the diameter of the trachea into a pre-fitted mathematical relationship to obtain the real-time contact length between the ablation electrode and the trachea.

[0073] In another embodiment, step S130 includes: determining the real-time contact length between the ablation electrode and the trachea according to a pre-established correspondence between the real-time displacement distance, the diameter of the trachea and the real-time contact length.

[0074] In one embodiment, after step S130, the method further includes:

[0075] S140: Determine a real-time sticking state diagram of the ablation electrode and the trachea according to the real-time sticking length.

[0076] In one implementation, step S140 specifically includes:

[0077] S141: Determine the real-time expansion state of the ablation electrode according to the real-time displacement distance collected by the displacement sensor and the diameter of the trachea.

[0078] S142: Generate a real-time contact state diagram of the ablation electrode and the trachea according to the real-time expansion state of the ablation electrode, the diameter of the trachea, and the real-time contact length.

[0079] Among them, the method for determining the sticking length in this embodiment is executed by the control host 120 in the above embodiment. For the detailed process, please refer to the above related content and will not be repeated here.

[0080] See also Figure 5 , Figure 5 It is a structural diagram of an embodiment of the control host of the present application, and the control host includes a processor 210, a memory 220 and a communication circuit 230. The processor 210 is coupled to the memory 220 and the communication circuit 230 respectively. The memory 220 stores program data. The processor 210 implements the method for determining the abutment length in any of the above-mentioned embodiments by executing the program data in the memory 220. The detailed method steps can be found in the above-mentioned embodiments and will not be repeated here.

[0081] See also Figure 6 , Figure 6 The computer-readable storage medium 400 stores a computer program 410, which can be executed by a control host to implement the steps in any of the above methods.

[0082] Among them, the computer-readable storage medium 400 can specifically be a device that can store the computer program 410, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or it can also be a server that stores the computer program 410. The server can send the stored computer program 410 to other devices for execution, or it can also run the stored computer program 410 by itself.

[0083] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An ablation system, characterized in that: The ablation system comprises: An ablation catheter comprises a core shaft, an ablation electrode connected to the distal end of the core shaft, a pushing member connected to the proximal end of the core shaft, an operating handle slidably connected to the pushing member, and a displacement sensor, wherein the ablation electrode expands or contracts as the core shaft moves in the axial direction; and the displacement sensor is used to collect the real-time displacement distance of the core shaft relative to the operating handle; A control host, electrically connected to the displacement sensor, for determining a real-time contact length between the ablation electrode and the trachea according to the diameter of the trachea and the real-time displacement distance collected by the displacement sensor, and determining a real-time contact state diagram between the ablation electrode and the trachea according to the real-time contact length; A display is electrically connected to the control host and is used to display the real-time sticking state diagram and the real-time sticking length.

2. The ablation system according to claim 1, characterized in that: The operating handle is provided with a receiving cavity, the proximal end of the core shaft extends into the receiving cavity, and the displacement sensor is located in the receiving cavity.

3. The ablation system according to claim 1, characterized in that: The control host is also used for: In response to the impedance reduction between the ablation electrode and the trachea, the maximum expansion diameter of the ablation electrode at the current moment is determined according to the real-time displacement distance collected by the displacement sensor at the current moment, and the diameter of the trachea is determined according to the maximum expansion diameter at the current moment.

4. The ablation system according to claim 1, characterized in that: The control host is also used for: Substituting the real-time displacement distance and the diameter of the trachea into a pre-fitted mathematical relationship to obtain the real-time contact length between the ablation electrode and the trachea, or, The real-time contact length between the ablation electrode and the trachea is determined according to the pre-established correspondence between the real-time displacement distance, the diameter of the trachea and the real-time contact length.

5. The ablation system according to claim 1, characterized in that: The control host is also used for: Determining the real-time expansion state of the ablation electrode according to the real-time displacement distance collected by the displacement sensor and the diameter of the trachea; A real-time sticking state diagram of the ablation electrode and the trachea is generated according to the real-time expansion state of the ablation electrode, the diameter of the trachea, and the real-time sticking length.

6. A method for determining the abutment length, characterized in that: The method comprises: Acquiring a real-time displacement distance of a core shaft in an ablation catheter relative to an operating handle, wherein the distal end of the core shaft is connected to an ablation electrode, and the proximal end is connected to a pushing member, the pushing member is slidably connected to the operating handle, and the ablation electrode expands or contracts as the core shaft moves in the axial direction; Get the diameter of the trachea; The real-time contact length between the ablation electrode and the trachea is determined according to the real-time displacement distance and the diameter of the trachea.

7. The method according to claim 6, characterized in that The step of determining the real-time contact length between the ablation electrode and the trachea according to the real-time displacement distance and the diameter of the trachea comprises: Substituting the real-time displacement distance and the diameter of the trachea into a pre-fitted mathematical relationship to obtain the real-time contact length between the ablation electrode and the trachea, or, The real-time contact length between the ablation electrode and the trachea is determined according to the pre-established correspondence between the real-time displacement distance, the diameter of the trachea and the real-time contact length.

8. The method according to claim 6, characterized in that The step of obtaining the diameter of the trachea comprises: When it is detected that the impedance between the ablation electrode and the trachea decreases, the maximum expansion diameter of the ablation electrode at the current moment is determined according to the real-time displacement distance collected at the current moment; The diameter of the trachea is determined according to the maximum expansion diameter.

9. The method according to claim 8, characterized in that The step of determining the maximum expansion diameter of the ablation electrode at the current moment according to the real-time displacement distance collected at the current moment comprises: The maximum expansion diameter of the ablation electrode at the current moment is determined according to the pre-established corresponding relationship between the real-time displacement distance and the maximum expansion diameter.

10. The method according to claim 6, characterized in that The method further comprises: Determining a real-time expansion state of the ablation electrode according to the real-time displacement distance and the diameter of the trachea; A real-time sticking state diagram of the ablation electrode and the trachea is generated according to the real-time expansion state of the ablation electrode, the diameter of the trachea, and the real-time sticking length.

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