Ablation system and method of determining abutment length

Abstract

The application discloses an ablation system and a method for determining abutting length, which comprises an ablation catheter, a control host, and a display. The ablation catheter comprises a mandrel, an ablation electrode, a pusher, an operating handle, and a displacement sensor. The displacement sensor is used to collect real-time displacement distance of the mandrel relative to the operating handle. The control host is electrically connected with the displacement sensor, and is used to determine real-time abutting 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 to determine a real-time abutting state diagram of the ablation electrode and the trachea according to the real-time abutting length. The display is electrically connected with the control host, and is used to display the real-time abutting state diagram and the real-time abutting length. The ablation system provided by the application can improve the effectiveness of treatment.

Description

TECHNICAL FIELD

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

[0002] Pulsed field ablation (PFA) is a new and effective interventional ablation treatment method. The ablation principle is to apply intermittent high-intensity pulsed electric field in a very short time to cause irreversible damage to cell membranes and death. For ablation treatment of different lesion sites, the use of appropriate ablation electrodes can achieve precise ablation of the lesion site, reduce the loss of electric field energy, and improve the ablation treatment effect.

[0003] In pulsed field ablation, nanosecond pulses with a duration of nanoseconds can more effectively destroy cell membranes at high voltage and short duration, enhancing the ablation effect. Nanosecond pulses are usually applied at high frequency, which can apply multiple high-energy impacts to the cell membrane in a short time.

[0004] Chronic obstructive pulmonary disease (COPD) is a chronic bronchitis and / or emphysema with airflow obstruction, which can further develop into pulmonary heart disease and respiratory failure. It is a common chronic disease with high morbidity and mortality, which is related to abnormal inflammatory response to harmful gases and harmful particles.

[0005] Pulsed field ablation, especially nanosecond pulse, can be a good way to treat chronic obstructive pulmonary disease. However, there is a certain degree of difficulty in operating the ablation catheter to ablate the target site, and the effectiveness of the treatment needs to be further improved. SUMMARY

[0006] The present application provides an ablation system and a method for determining abutting length, which can improve the effectiveness of treatment.

[0007] The first aspect of the embodiment of the present application provides an ablation system, which comprises: an ablation catheter comprising 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 operation handle in sliding connection with the pushing member, and a displacement sensor, the ablation electrode expands or shrinks along with the movement of the core shaft in the axial direction; the displacement sensor is used to collect the real-time displacement distance of the core shaft relative to the operation handle; a control host electrically connected to the displacement sensor is used to determine the real-time abutting length of the ablation electrode to 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 abutting state diagram of the ablation electrode to the trachea according to the real-time abutting length; and a display electrically connected to the control host is used to display the real-time abutting state diagram and the real-time abutting length.

[0008] The second aspect of the embodiment of the present application provides a method for determining the abutting length, which comprises: collecting the real-time displacement distance of the core shaft in the ablation catheter relative to the operation handle, wherein the distal end of the core shaft is connected to the ablation electrode, the proximal end of the core shaft is connected to the pushing member, the pushing member is in sliding connection with the operation handle, and the ablation electrode expands or shrinks along with the movement of the core shaft in the axial direction; collecting the diameter of the trachea; and determining the real-time abutting length of the ablation electrode to the trachea according to the real-time displacement distance and the diameter of the trachea.

[0009] The beneficial effect is that: by arranging the displacement sensor in the ablation catheter, the real-time displacement distance of the core shaft relative to the operation handle is collected by the displacement sensor, the real-time abutting length of the ablation electrode to the trachea is determined according to the diameter of the trachea and the real-time displacement distance collected by the displacement sensor, then the real-time abutting state diagram of the ablation electrode to the trachea is determined according to the real-time abutting length, and finally the real-time abutting state diagram and the real-time abutting length are displayed on the display, which can avoid the deformation of the ablation electrode in the body caused by excessive pushing of the pushing member, and also allows the operator to give the number of ablation according to the real-time abutting length of the ablation electrode to the trachea, thereby increasing the effectiveness of treatment. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work, wherein:

[0011] Figure 1 is a structural schematic diagram of an embodiment of the ablation system of the present application;

[0012] Figure 2is a schematic diagram of a real-time ablation electrode and trachea contact state;

[0013] Figure 3 is Figure 1 is a schematic diagram of an embodiment of the ablation catheter;

[0014] Figure 4 is a schematic diagram of an embodiment of the ablation catheter;

[0015] Figure 5 is a schematic diagram of an embodiment of the control host;

[0016] Figure 6 is a schematic diagram of an embodiment of the computer readable storage medium. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0018] It should be noted that the terms "first", "second" in the present application are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0019] In the present application, "distal end", "proximal end" are used as directional words, which are common terms in the field of interventional medical devices, wherein "distal end" means the end far from the operator during the operation, "proximal end" means the end close to the operator during the operation. "Axial direction" refers to the direction parallel to the center line connecting the distal end center and the proximal end center of the medical device; "radial direction" refers to the direction perpendicular to the "axial direction".

[0020] Referring to Figure 1 , Figure 1is a structural schematic diagram of an embodiment of the ablation system of the present application, which includes an ablation catheter 110, a control host 120, and a display 130.

[0021] The ablation catheter 110 includes a mandrel 111, an ablation electrode 112 connected to a distal end of the mandrel 111, a pusher 113 connected to a proximal end of the mandrel 111, and an operating handle 114 in sliding connection with the pusher 113. The pusher 113 is used to drive the mandrel 111 to move axially relative to the operating handle 114, and the ablation electrode 112 expands or shrinks with the axial movement of the mandrel 111. Specifically, the ablation electrode 112 expands when the mandrel 111 moves axially away from the operating handle 114, and the ablation electrode 112 shrinks when the mandrel 111 moves axially towards the operating handle 114.

[0022] Specifically, the mandrel 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 referred to as a single electrode, which is used to receive a pulsed ablation signal to generate a pulsed ablation electric field, causing irreversible damage to cell membranes for cell death, thereby achieving the purpose of ablation. In an embodiment, the ablation electrode 112 has a woven mesh basket structure, which can expand or shrink in the radial direction. Meanwhile, the pusher 113 is in sliding connection with the operating handle 114. During the operation, when the operator pushes the pusher 113 distally, the ablation electrode 112 moves distally under the driving of the mandrel 111 under the driving of the pusher 113, and when the operator pulls the pusher 113 proximally, the ablation electrode 112 moves proximally under the driving of the mandrel 111. Meanwhile, as the ablation electrode 112 moves distally, the ablation electrode 112 gradually expands in the radial direction, i.e., the ablation electrode 112 is gradually released, and as the ablation electrode 112 moves proximally, the ablation electrode 112 gradually shrinks in the radial direction.

[0023] In an embodiment, in the initial state (at this time, the operator does not push the pusher 113 distally), the ablation electrode 112 remains in a contracted state, and the outer diameter thereof is maintained at about 3 mm. When the pusher 113 is slid to the distal limit position, the ablation electrode 112 is fully released to form a balloon-like state with an outer diameter of 20-30 mm.

[0024] Referring to Figure 2 , Figure 2The state of the ablation electrode 112 in the trachea 20 is shown. During the treatment process, the ablation electrode 112 can be loaded into an endoscope and sent to the target treatment area in the trachea 20 through the endoscope. Then the ablation electrode 112 is extended from the endoscope to ablate the target tissue. The endoscope can only reach the 4th level of the bronchus, and 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. 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 pusher 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.

[0025] In order to avoid the above problems, please refer to Figure 1 and Figure 2 In the present application, the ablation catheter 110 is further provided with a displacement sensor 115. 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). It is used to determine the real-time contact length L1 between the ablation electrode 112 and the trachea 20 based on the real-time displacement distance collected by the displacement sensor 115 and the diameter D of the trachea 20.

[0026] 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 peripheral surface 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 longer and longer, until the ablation electrode 112 expands to the limit state; and for different tracheae 20, after the outer peripheral surface of the ablation electrode 112 contacts the wall of the trachea 20, at 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.

[0027] As known from the foregoing, the expansion degree of the ablation electrode 112 depends on the displacement distance of the mandrel 111 relative to the operation handle 114, specifically, the displacement distance of the mandrel 111 relative to the operation handle 114 is defined as 0 in the initial state, and as the mandrel 111 moves towards the distal end relative to the operation handle 114, the displacement distance of the mandrel 111 relative to the operation 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 mandrel 111 relative to the operation handle 114, and thus the real-time abutting length L1 of the ablation electrode 112 against the trachea 20 is indirectly related to the real-time displacement distance of the mandrel 111 relative to the operation handle 114.

[0028] Therefore, the control host 120 can determine the real-time abutting length L1 of the ablation electrode 112 against 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 abutting length L1 will be described below.

[0029] After obtaining the real-time abutting length L1, the control host 120 can also generate a real-time abutting state diagram of the ablation electrode 112 against the trachea 20 according to the real-time abutting length L1, and finally the display 130 electrically connected to the control host 120 displays the real-time abutting state diagram and the real-time abutting length L1.

[0030] Therefore, during the treatment process, the operator can adjust the ablation times through the real-time abutting state diagram and the real-time abutting length L1 presented by the display 130, thereby increasing the effectiveness of the treatment.

[0031] In an embodiment, the control host 120 can be integrated on a pulse ablation host. In addition to including the control host 120, the pulse ablation host can also be integrated with a pulse device for generating a pulse ablation signal and sending the pulse ablation signal to the ablation electrode 112.

[0032] The displacement sensor 115 can be a contact type displacement sensor or a non-contact type displacement sensor. The contact type displacement sensor is usually in direct contact with the measured object and works by measuring the displacement of the object. The non-contact type displacement sensor does not directly contact the measured object and senses the displacement by measuring the changes of electromagnetic field, optical or other physical phenomena. Meanwhile, the displacement sensor 115 can work in a capacitive, eddy current or laser mode. The capacitive displacement sensor measures the distance by using the change of capacitance; the eddy current displacement sensor measures the distance by using the change of magnetic field; and the laser displacement sensor measures the distance by emitting laser and measuring the change of reflected laser.

[0033] When the displacement sensor 115 is a contact type displacement sensor, the displacement sensor 115 can be a potentiometer type displacement sensor, which senses displacement by measuring the change of resistance. The movable brush of the potentiometer type displacement sensor is connected to the measured object. When the object moves, the position of the brush changes, resulting in the change of resistance value, and thus outputs the corresponding electric signal. When the displacement sensor 115 is a non-contact type displacement sensor, the displacement sensor 115 can be a Hall type or photoelectric type displacement sensor. The Hall type displacement sensor senses displacement by measuring the change of magnetic field according to the Hall effect principle. The photoelectric type displacement sensor senses displacement by measuring the change of light signal according to the photoelectric effect.

[0034] In an embodiment, in combination with Figure 1 and Figure 3 The operating handle 114 is provided with a receiving cavity 1141, and 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 the operating handle 114, and can also ensure the accuracy of the signal collected by the displacement sensor 115.

[0035] However, in other embodiments, the displacement sensor 115 can also be arranged on the outer surface of the operating handle 114, or can also be arranged on the mandrel 111, the ablation electrode 112 or the pushing member 113. In summary, the type and arrangement position of the displacement sensor 115 are not limited in the present application.

[0036] Continuing to refer to Figure 3 In an embodiment, the displacement sensor 115 includes a sensing end 1151 and a collecting end 1152, 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 can be connected to the operating handle 114, and the collecting end 1152 can be connected to the mandrel 111, or the sensing end 1151 can be connected to the mandrel 111, and the collecting end 1152 can be connected to the operating handle 114. For the convenience of description, the sensing end 1151 is connected to the operating handle 114, and the collecting end 1152 is connected to the mandrel 111, and the scheme is introduced as follows:

[0037] With the movement of the collecting end 1152 relative to the sensing end 1151, the sensing end 1151 generates a sensing signal representing the displacement distance between the collecting end 1152 and the sensing end 1151, and sends the signal to the control host 120. Since the collecting end 1152 is connected to the mandrel 111, the displacement distance between the sensing end 1151 and the collecting end 1152 is the displacement distance of the mandrel 111 relative to the operating handle 114, and thus the displacement distance of the mandrel 111 relative to the operating handle 114 is achieved.

[0038] In an embodiment, in combination withFigure 1 and Figure 2 The control host 120 determines the diameter D of the trachea 20 through the following steps:

[0039] S121: When the impedance between the ablation electrode 112 and the trachea 20 is detected to decrease, the maximum expansion diameter H of the ablation electrode 112 at the current moment is determined based on the real-time displacement distance collected by the displacement sensor 115 at the current moment.

[0040] S122: Determine the diameter D of the trachea 20 based on the maximum expansion diameter H at the current moment.

[0041] Specifically, before the outer peripheral surface 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 peripheral surface of the ablation electrode 112 contacts the wall of the trachea 20, the impedance between the ablation electrode 112 and the trachea 20 drops sharply. Therefore, when the impedance between the ablation electrode 112 and the trachea 20 is detected to decrease, it means that the outer peripheral surface 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.

[0042] In order to reduce misjudgment and improve accuracy, efficiency and treatment effect, step S121 can also determine the maximum expansion diameter H of the ablation electrode 112 at the current moment based on 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.

[0043] In other embodiments, the diameter D of the trachea 20 can also be determined by other means, for example, by determining the diameter D of the trachea 20 through images taken by an endoscope. Specifically, the endoscope collects 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 collected by the endoscope.

[0044] 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.

[0045] 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 the correspondence is saved in a database. Then, 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 the maximum expansion diameter H of the ablation electrode 112 at the current moment is determined based on the maximum expansion diameter H found.

[0046] 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. Alternatively, 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 being greater than the real-time displacement distance at the current moment, and the second displacement distance being less than the real-time displacement distance at the current moment. Then, based on 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, the maximum expansion diameter H of the ablation electrode 112 at the current moment can be determined by interpolation.

[0047] It should be noted that in other embodiments, a mathematical relationship between the real-time displacement distance and the maximum expansion diameter H can 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.

[0048] In one embodiment, combining Figure 1 and Figure 2 The control host 120 determines the real-time contact length L1 through the following steps:

[0049] S131 : Substitute the real-time displacement distance and the diameter D of the trachea 20 into a pre-fitted mathematical equation to obtain the real-time contact length L1 between the ablation electrode 112 and the trachea 20 .

[0050] 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. 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.

[0051] In another embodiment, combined Figure 1 and Figure 2 The control host 120 determines the real-time contact length L1 through the following steps:

[0052] 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 .

[0053] 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 contact length L1 is established in advance, and the correspondence is saved in a database. Then, during the processing, the real-time contact length L1 corresponding to the real-time displacement distance and the diameter D of the trachea 20 is searched in the correspondence in the database to obtain the real-time contact length L1 at the current moment.

[0054] 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.

[0055] In one embodiment, combining Figure 1 and Figure 2 The control host 120 generates a real-time contact state diagram of the ablation electrode 112 and the trachea 20 through the following steps:

[0056] S141 : Determine the real-time expansion state of the ablation electrode 112 based on the real-time displacement distance collected by the displacement sensor 115 and the diameter D of the trachea 20 .

[0057] 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 .

[0058] 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 diameters of various locations of the ablation electrode 112 .

[0059] From the above 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. 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.

[0060] 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.

[0061] 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.

[0062] In one embodiment, step S141 specifically involves determining the real-time expansion state of the ablation electrode 112 based on a pre-established correspondence. Specifically, within 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, the real-time expansion state of the ablation electrode 112 corresponding to both the real-time displacement distance and the diameter D of the trachea 20 is searched. The search process is similar to the process of searching the real-time contact length L1 described above. For details, please refer to the above-mentioned related content and will not be further described here.

[0063] See Figure 4 , Figure 4 : is a flow chart of an embodiment of a method for determining the contact length of the present application, the method comprising:

[0064] S110: Acquire the real-time displacement distance of the core shaft in the ablation catheter relative to the operating handle.

[0065] The distal end of the core shaft is connected to the ablation electrode, and the proximal end is connected to the pushing member. 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.

[0066] S120: Obtain the diameter of the trachea.

[0067] 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.

[0068] In one embodiment, step S120 specifically includes:

[0069] 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.

[0070] 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.

[0071] S123: Determine the diameter of the trachea according to the maximum expansion diameter.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] In one embodiment, after step S130, the method further includes:

[0076] S140: Determine a real-time contact state diagram of the ablation electrode and the trachea according to the real-time contact length.

[0077] In one embodiment, step S140 specifically includes:

[0078] S141: Determine the real-time expansion state of the ablation electrode based on the real-time displacement distance collected by the displacement sensor and the diameter of the trachea.

[0079] 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.

[0080] Among them, the method for determining the abutment 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.

[0081] See Figure 5 , Figure 5It is a structural diagram of an embodiment of the control host of the present application, which 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 adhesion 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.

[0082] See 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 of any of the above methods.

[0083] 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 itself.

[0084] The above description is merely 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 applied 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 pusher connected to the proximal end of the core shaft, an operating handle slidably connected to the pusher, and a displacement sensor. 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 electrically connected to the displacement sensor, configured to determine a real-time contact length between the ablation electrode and the trachea based on the diameter of the trachea and the real-time displacement distance collected by the displacement sensor, and to determine a real-time contact state diagram between the ablation electrode and the trachea based on the real-time contact length; a display electrically connected to the control host, and configured to display the real-time sticking state diagram and the real-time sticking length; 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 based on the real-time displacement distance collected by the displacement sensor at the current moment, and the diameter of the trachea is determined based on the maximum expansion diameter at the current moment.

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

3. The ablation system according to claim 1, wherein: The control host is also used for: Substitute 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 a pre-established correspondence between the real-time displacement distance, the diameter of the trachea, and the real-time contact length.

4. The ablation system according to claim 1, wherein: The control host is also used for: determining a 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 contact 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 contact length.

Images