Radiofrequency ablation control device and radiofrequency ablation system

Abstract

The application discloses a radio frequency ablation control device and a radio frequency ablation system, and belongs to the radio frequency treatment field. The application also discloses a radio frequency ablation control device which is configured in a radio frequency ablation system, wherein the radio frequency ablation system comprises a radio frequency generator; the device comprises: a temperature acquisition module which is used for acquiring a current temperature value and historical temperature data of a current treatment area; a temperature rise determination module which is used for determining a current temperature rise rate of the current treatment area according to the current temperature value and the historical temperature data; and a power adjustment module which is used for adjusting real-time output power of the radio frequency generator according to the current temperature rise rate, so that the temperature value of the current treatment area is less than or equal to a preset temperature threshold. The application can avoid too fast temperature rise, and thus the temperature of the treatment area is less than the preset temperature threshold during the whole treatment process, i.e. is within a preset temperature safety range.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radio frequency treatment, in particular to a radio frequency ablation control device and a radio frequency ablation system. BACKGROUND

[0002] In the related art, a radio frequency treatment instrument utilizes the biological thermal effect of radio frequency energy to selectively heat the target tissue of the human body through an electrode sheet to liquefy and destroy the target tissue cells.

[0003] However, in the working process of the existing radio frequency ablation system, the temperature control deviation is large, which can easily cause the actual tissue temperature to exceed the safe range, resulting in high skin temperature, causing skin ulceration or high target tissue temperature, causing tissue charring.

[0004] SUMMARY

[0005] The main purpose of the present application is to provide a radio frequency ablation control device and a radio frequency ablation system, which aims to solve the technical problem of inaccurate temperature control of the radio frequency ablation system.

[0006] To achieve the above purpose, the present application provides a radio frequency ablation control device configured in a radio frequency ablation system, wherein the radio frequency ablation system comprises a radio frequency generator;

[0007] The device comprises:

[0008] a temperature acquisition module configured to acquire a current temperature value and historical temperature data of a current treatment area;

[0009] a temperature rise determination module configured to determine a current temperature rise rate of the current treatment area according to the current temperature value and the historical temperature data;

[0010] a power adjustment module configured to adjust the real-time output power of the radio frequency generator according to the current temperature rise rate, so that the temperature value of the current treatment area is less than or equal to a preset temperature threshold.

[0011] In a possible embodiment of the present application, the temperature rise module is specifically configured to extract a last temperature value of a last detection time adjacent to a current detection time from the historical temperature data; and determine a temperature rise value of the current temperature value relative to the last temperature value.

[0012] The power adjustment module is specifically configured to adjust the real-time output power of the radio frequency generator according to the temperature rise value and a preset temperature rise threshold, so that the temperature value of the current treatment area is less than or equal to a preset temperature threshold.

[0013] In a possible embodiment of the present application, the power adjustment module specifically comprises:

[0014] a temperature rise judgment module, configured to judge whether the temperature rise value is greater than the preset temperature rise threshold value;

[0015] If greater than the preset temperature rise threshold value, a first adjustment unit executes to reduce the real-time output power of the radio frequency generator;

[0016] If less than or equal to the preset temperature rise threshold value, a second adjustment unit executes to adjust the real-time output power of the radio frequency generator according to the current temperature value and a preset target temperature, the preset target temperature being less than the preset temperature threshold value.

[0017] In an embodiment of the present application, the second adjustment unit comprises:

[0018] a temperature difference determination sub-unit, configured to obtain a current temperature deviation value according to the current temperature value and the preset target temperature;

[0019] a temperature difference judgment sub-unit, configured to judge whether the current temperature deviation value and a last temperature deviation value at a last detection time meet a preset condition; wherein the preset condition is that the current temperature deviation value is positive and the last temperature deviation value is negative, or the current temperature deviation value is negative and the last temperature deviation value is positive;

[0020] If yes, a proportional integral controller executes to adjust the real-time output power of the radio frequency ablation system according to the current temperature deviation value in a proportional integral control mode;

[0021] If no, a proportional integral derivative controller executes to adjust the real-time output power of the radio frequency generator according to the current temperature deviation value in a proportional integral derivative control mode.

[0022] In an embodiment of the present application, the device further comprises:

[0023] a temperature judgment module, configured to judge whether the current temperature value is greater than the preset temperature threshold value;

[0024] If greater than the preset temperature threshold value, the power adjustment module executes to control the radio frequency generator to stop outputting radio frequency energy and output an alarm information;

[0025] If less than or equal to the preset temperature threshold value, the temperature rise determination module executes to determine a current temperature rise rate of the current treatment area according to the current temperature value and the historical temperature data.

[0026] In an embodiment of the present application, the device further comprises:

[0027] an impedance acquisition module, configured to acquire a current impedance value of the current treatment area in a current detection period;

[0028] a sequence updating module configured to update an impedance value sequence based on the current impedance value, the impedance value sequence comprising a plurality of impedance values sorted according to detection periods;

[0029] an impedance change module configured to determine impedance value changes between any two adjacent impedance values in the impedance value sequence, and obtain an impedance value change sequence;

[0030] a proportion determining module configured to determine a target change from the impedance value change sequence, the target change being greater than a preset impedance value change threshold;

[0031] If the proportion of the target change is less than or equal to a preset proportion threshold, the proportion determining module controls the temperature obtaining module to perform the obtaining of the current temperature value and the historical temperature data of the current treatment region.

[0032] In an embodiment of the present application, if the proportion of the target change in the impedance value change sequence is greater than the preset proportion threshold, the proportion determining module controls the power adjusting module to perform the reduction of the real-time output power of the radio frequency generator.

[0033] In an embodiment of the present application, the power adjusting module is specifically configured to reduce the real-time output power of the radio frequency generator according to a preset adjustment rate.

[0034] In an embodiment of the present application, the device further comprises:

[0035] an impedance determining module configured to determine whether the current impedance value is greater than a preset impedance threshold;

[0036] If the current impedance value is greater than the preset impedance threshold, the power adjusting module controls the radio frequency generator to stop outputting radio frequency energy and outputs an alarm information.

[0037] If the current impedance value is less than the preset impedance threshold, the sequence updating module updates the impedance value sequence based on the current impedance value, the impedance value sequence comprising a plurality of impedance values sorted according to detection periods.

[0038] In a second aspect, the present application further provides a radio frequency ablation system, comprising:

[0039] a radio frequency generator; and

[0040] a radio frequency ablation control device as described above, the radio frequency ablation control device being connected with the radio frequency generator and configured to control the real-time output power of the radio frequency generator.

[0041] The embodiment of the present application provides a radio frequency ablation control device and a radio frequency ablation system, the device comprises: a temperature acquisition module, which is used for acquiring a current temperature value and historical temperature data of a current treatment area; a temperature rise determination module, which is used for determining a current temperature rise rate of the current treatment area according to the current temperature value and the historical temperature data; and a power adjustment module, which is used for adjusting real-time output power of the radio frequency generator according to the current temperature rise rate, so that the temperature value of the current treatment area is less than or equal to a preset temperature threshold.

[0042] Therefore, in the embodiment of the present application, the temperature rise rate of the current treatment area is monitored, and corresponding power adjustment measures are taken, so that the temperature rise rate of the current treatment area is controllable, the temperature rise is prevented from being too fast, and the temperature of the treatment area is less than the preset temperature threshold in the whole treatment process, that is, the temperature of the treatment area is in the preset temperature safety range, so that the safety of the system in the treatment process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of a handle of a radio frequency ablation system of the present application;

[0044] Figure 2 FIG. 2 is a module schematic diagram of a first embodiment of a radio frequency ablation control device of the present application;

[0045] Figure 3 FIG. 3 is a submodule schematic diagram of a power adjustment module in the first embodiment of the radio frequency ablation control device of the present application;

[0046] Figure 4 FIG. 4 is a submodule schematic diagram of a second adjustment unit in the first embodiment of the radio frequency ablation control device of the present application;

[0047] Figure 5 FIG. 5 is a module schematic diagram of a second embodiment of the radio frequency ablation control device of the present application;

[0048] Figure 6 FIG. 6 is a module schematic diagram of a third embodiment of the radio frequency ablation control device of the present application;

[0049] Figure 7 FIG. 7 is a module schematic diagram of a fourth embodiment of the radio frequency ablation control device of the present application.

[0050] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0051] It should be understood that the specific embodiments described herein are merely intended to explain the present application, and are not intended to limit the present application.

[0052] At present, radio frequency technology is more and more widely used in skin tightening, fat reduction, liposuction and other aspects. Mainly using the biological heat effect of radio frequency energy, the target tissue to be treated is selectively heated by the electrode sheet, the fat cells are liquefied and destroyed, the decomposition of fat tissue is discharged out of the body through metabolism or sucked out by the liposuction device, and at the same time, the soft tissue is contracted in a large area to achieve the purpose of tightening and slimming.

[0053] However, the radio frequency ablation system needs to pay attention to the temperature control of the treatment area during use. When the epidermal temperature of the treatment area is too high, the patient's epidermis will ulcerate, the target tissue temperature is too high, which will cause the tissue to be burned and carbonized, and the target tissue temperature is too low, which will not achieve the purpose of ablation. In the related art, the real-time temperature value is mainly detected to adjust the real-time output power of the radio frequency generator. However, since the temperature sensor of the radio frequency ablation system is generally arranged outside the patient's body, that is, the temperature detection has a certain hysteresis, so that when the temperature rises too fast, the existing control method causes the actual temperature to exceed the preset safe temperature range. That is, the temperature control of the existing radio frequency ablation system is not accurate.

[0054] Therefore, the present application provides a solution. During the treatment process of the radio frequency ablation system, the temperature rising rate of the treatment area is monitored, and corresponding power adjustment measures are taken, so that the temperature rising rate of the current treatment area is controllable, the temperature rising is avoided, and the temperature of the treatment area during the whole treatment process is less than the preset temperature threshold, that is, it is within the preset temperature safety range, so as to improve the safety of the system during the treatment process.

[0055] The inventive concept of the present application will be further described below in conjunction with some specific embodiments.

[0056] In the following embodiments of the present application, the radio frequency ablation system applied in the technical implementation of the present application will be described.

[0057] The radio frequency ablation system includes a host and a handle.

[0058] The host includes a radio frequency generator and a controller. The controller is configured with various modules provided by each radio frequency ablation control device embodiment.

[0059] In an embodiment, the controller comprises at least one processor and a memory. In some embodiments, the processor and the memory are integrated on the same chip or circuit board; in some other embodiments, either or both of the processor and the memory can be implemented on a separate chip or circuit board. That is, the controller can be a microprocessor such as a single-chip microcomputer, a DSP, an FPGA, or the like, and in some embodiments, can also be implemented using a special-purpose chip for a radio-frequency micro-needle treatment instrument, which is not limited in the present embodiment. Those skilled in the art can clearly understand that the technical solutions provided by the device embodiments of the present application can be implemented by means of software and necessary general hardware, and can also be implemented by means of special hardware including special-purpose integrated circuits, special-purpose CPUs, special-purpose memories, special-purpose components, and the like. Generally, any function completed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure for implementing the same function can also be various, such as analog circuits, digital circuits, or special-purpose circuits. However, for the present application, software program implementation is a better implementation manner. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product stored in a readable storage medium, such as a computer floppy disk, a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the method of each embodiment of the present application.

[0060] The handle is detachably connected to the main machine through a cable. The handle comprises a handle body, an outer electrode, an inner electrode 2, a temperature sensor, and an impedance detector. Referring to Figure 1 , the handle body comprises a treatment head 1, one end of the needle-shaped or columnar inner electrode 2 is fixed to the handle body, and the other end extends to the treatment head 1 and is spaced apart from the treatment head 1. The outer electrode is arranged at the treatment head 1, so that the inner electrode and the outer electrode are arranged opposite to and spaced apart from each other, so that in the specific treatment process, the inner electrode is inserted into the treatment area, such as the subcutaneous fat layer. The outer electrode is arranged at the skin of the treatment area, such as being closely attached to the outside of the skin. It can be understood that the inner electrode has a high temperature to perform tissue ablation, and the outer electrode has a low temperature, such as less than 48°C, to assist fat dissolution and skin tightening after fat suction.

[0061] The temperature sensor 3 is also arranged at the treatment head to detect the temperature value of the skin of the treatment area.

[0062] The impedance detector 4 is used to detect the tissue impedance between the inner electrode and the outer electrode in real time and feed back to the control device.

[0063] Those skilled in the art can understand that the structure shown in the figure does not constitute a limitation on the radio frequency therapeutic instrument, and can include more or less components than the figure, or combine certain components, or different component arrangements. Figure 1

[0064] The present application also provides a radio frequency ablation control device. Referring to Figure 2 , Figure 2 The functional module diagram of the first embodiment of the radio frequency ablation control device is shown in the figure.

[0065] In this embodiment, the device includes a temperature acquisition module 10, a temperature rise determination module 20 and a power adjustment module 30.

[0066] The temperature acquisition module 10 is configured to acquire the current temperature value and the historical temperature data of the current treatment area; the temperature rise determination module 20 is configured to determine the current temperature rise rate of the current treatment area according to the current temperature value and the historical temperature data; and the power adjustment module 30 is configured to adjust the real-time output power of the radio frequency generator according to the current temperature rise rate, so that the temperature value of the current treatment area is less than or equal to the preset temperature threshold.

[0067] Specifically, in this embodiment, the memory of the radio frequency ablation system stores corresponding parameters such as the conventional temperature range, the treatment temperature range, the output power range of the radio frequency generator, the tissue impedance range, and the preset temperature threshold. It can be understood that the above-mentioned parameters can be configured by the manufacturer of the radio frequency ablation system before leaving the factory. In an example, for a certain type of radio frequency ablation system, the conventional temperature range is 20-48℃, the treatment temperature range is 35-42℃, the radio frequency power range is 5-75W, and the tissue impedance range is 10-1000Ω. It can be understood that the preset temperature threshold can be valued according to the upper limit value of the treatment temperature range, such as 0.1-1℃ greater than 42℃.

[0068] ​When the radio frequency ablation system starts to work, the initial output power of the radio frequency generator and the preset target temperature are configured on the radio frequency ablation system in advance by an operator such as a medical staff. It can be understood that the specific value of the initial output power is taken in the output power range, and the preset target temperature should also be taken in the treatment temperature range. Then the medical staff moves the handle to the treatment site of the patient, inserts the inner electrode into the treatment site, and tightly attaches the outer electrode above the skin of the treatment site. At this time, the tissue region between the inner electrode and the outer electrode is the current treatment region. During the treatment process, the temperature sensor on the treatment head detects the current temperature value of the current treatment region and sends the current temperature value to the control device configured in the controller. It can be understood that the controller can also store the temperature values sent by the temperature sensor during the treatment process in the storage, thereby obtaining historical temperature data. Of course, the plurality of temperature values in the historical temperature data includes the order arranged according to the detection time.

[0069] It is worth mentioning that the temperature sensor can detect the current temperature value according to the preset temperature detection period. For example, in an example, the length of each period of the preset temperature detection period is 50-500 ms.

[0070] The temperature acquisition module 10 receives the current temperature value sent by the temperature sensor and extracts the historical temperature data from the storage. At this time, the temperature rise determination module 20 can determine the current temperature rise rate of the current treatment region according to the current temperature value and the historical temperature data. Wherein, the temperature rise rate is the speed of temperature rise of the current treatment region.

[0071] Specifically, as one option of the embodiment, the temperature rise determination module 20 can draw a temperature-time curve of the current treatment region according to the current temperature value and the historical temperature data, so as to calculate the current temperature rise rate according to the temperature-time curve.

[0072] After the current temperature rise rate is calculated, the power adjustment module 30 can adjust the real-time output power of the radio frequency generator according to the current temperature rise rate, so that the temperature value of the current treatment region is less than or equal to the preset temperature threshold.

[0073] Of course, as another option of the embodiment, the temperature rise determination module 20 can also be obtained according to the difference between the temperature values measured in adjacent detection periods. Specifically, the temperature rise module 20 is specifically used to extract the last temperature value of the last detection time adjacent to the current detection time from the historical temperature data; determine the temperature rise value of the current temperature value relative to the last temperature value.

[0074] At this time, the power adjustment module 30 is specifically used to adjust the real-time output power of the radio frequency generator according to the temperature rise value and the preset temperature rise threshold, so that the temperature value of the current treatment region is less than or equal to the preset temperature threshold.

[0075] At this time, the temperature rise value of the current temperature value relative to the last temperature value is taken as the current temperature rise rate. As in an example, the temperature rise value at the current K moment, or the Kth detection period, is ΔT K .

[0076] ΔT K = T(K) - T(K-1);

[0077] Wherein, ΔT K is the temperature rise value, T(K) is the current temperature value, and T(K-1) is the last temperature value.

[0078] In order to accurately measure whether the output power of the current radio frequency generator needs to be adjusted, or whether the current adjustment strategy of the radio frequency generator needs to be adjusted, a preset temperature rise threshold ΔT is provided in the embodiment. Thus, according to the numerical size relationship between ΔT K and ΔT, the real-time output power of the radio frequency generator can be adjusted so that the temperature value of the current treatment area is less than or equal to the preset temperature threshold.

[0079] Generally speaking, the power adjustment module 30 can reduce the real-time output power of the radio frequency generator when the current temperature rise rate is high. Or the power adjustment module can also not change the real-time output power of the radio frequency generator when the current temperature rise rate is low. Of course, in an example, if the power adjustment module 30 is currently controlling the radio frequency generator to increase the output power, the power adjustment module 30 can reduce the increase rate of the real-time output power of the radio frequency generator when the current temperature rise rate is high. Or the power adjustment module can also not change the increase rate of the real-time output power of the radio frequency generator when the current temperature rise rate is low.

[0080] Or, in another specific embodiment, the power adjustment module 30 can also adjust the output power adjustment strategy of the radio frequency generator to achieve better temperature control.

[0081] Specifically, referring to Figure 3 , the power adjustment module 30 specifically includes a temperature rise judgment module 310, a first adjustment unit 320, and a second adjustment unit 330. Wherein, the temperature rise judgment module 310 is used to judge whether the temperature rise value is greater than the preset temperature rise threshold. If it is greater than the preset temperature rise threshold, the first adjustment unit 320 reduces the real-time output power of the radio frequency generator. If it is less than or equal to the preset temperature rise threshold, the second adjustment unit 330 adjusts the real-time output power of the radio frequency generator according to the current temperature value and the preset target temperature, and the preset target temperature is less than the preset temperature threshold.

[0082] In the embodiment, if ΔT KWhen ΔT

[0083] When ΔT K ≤ ΔT, the second adjusting unit 330 adjusts the real-time output power of the radio frequency generator according to the current temperature value and a preset target temperature, and the preset target temperature is less than the preset temperature threshold.

[0084] Specifically, referring to Figure 4 , the second adjusting unit 330 comprises a temperature difference determining subunit 331, a temperature difference judging subunit 332, a proportional integral controller 333 and a proportional integral derivative controller 334.

[0085] The temperature difference determining subunit 331 is configured to obtain a current temperature deviation value according to the current temperature value and the preset target temperature. The temperature difference judging subunit 332 is configured to judge whether the current temperature deviation value and a last temperature deviation value at a last detection time satisfy a preset condition; wherein the preset condition is that the current temperature deviation value is a positive number and the last temperature deviation value is a negative number, or the current temperature deviation value is a negative number and the last temperature deviation value is a positive number.

[0086] If the preset condition is satisfied, the proportional integral controller 333 is configured to adjust the real-time output power of the radio frequency ablation system according to the current temperature deviation value by using a proportional integral control mode; if the preset condition is not satisfied, the proportional integral derivative controller 334 is configured to adjust the real-time output power of the radio frequency generator according to the current temperature deviation value by using a proportional integral derivative control mode.

[0087] That is, when ΔT K ≤ ΔT, the control device calculates a current temperature deviation value ΔT err,K between the current temperature value and the preset target temperature. err,K ΔT

[0088] If ΔT err,K < 0 < ΔT err,K-1 , or ΔT err,K > 0 > ΔT err,K-1 , the proportional integral controller 333 is configured to adjust the real-time output power of the radio frequency ablation system according to the current temperature deviation value by using a proportional integral control PI mode.

[0089] If the conditions are not met, the proportional-integral-derivative (PID) controller 334 will adjust the real-time output power of the RF generator according to the current temperature deviation value using a PID control method.

[0090] It is understandable that those skilled in the art know how to implement proportional-integral (PI) control or proportional-integral-derivative (PID) control, so it will not be elaborated here.

[0091] It is easy to see that the temperature rise rate reflects the speed at which the temperature of the area to be treated rises. Therefore, when the temperature rises rapidly and the current temperature value has not exceeded the preset temperature threshold, the real-time output power of the radiofrequency generator can be reduced in advance. This reduces the rate of increase of the real-time temperature value of the area to be treated, allowing it to approach the preset temperature threshold more slowly, or even stopping the temperature rise in time. This provides medical staff or operators with sufficient operating space or time to accurately control the temperature during treatment and avoids situations where the real-time temperature value of the current treatment area rises too quickly and exceeds the preset temperature threshold before medical staff or operators can take emergency measures, resulting in skin ulceration or tissue charring and carbonization.

[0092] Of course, in this embodiment, the power adjustment module 30 can also increase the real-time output power of the radio frequency generator or increase the power boosting speed of the radio frequency generator when the current temperature rise rate is low, so that the temperature of the current treatment area rises faster, thereby improving treatment efficiency and thus improving the treatment effect in each treatment course.

[0093] Therefore, in this embodiment, by monitoring the rate of temperature rise of the current treatment area compared to historical temperature data and taking corresponding power adjustment measures, the rate of temperature rise of the current treatment area is made controllable, avoiding excessive temperature rise. As a result, the temperature of the treatment area is always less than the preset temperature threshold during the entire treatment process, i.e., always within the preset safe temperature range, thereby improving the safety of the system during the treatment process.

[0094] Based on the above embodiments, a second embodiment of the radiofrequency ablation control device of this application is proposed. See also... Figure 5 , Figure 5 This is a schematic diagram of the modules of the second embodiment of the radiofrequency ablation control device of this application.

[0095] In this embodiment, the device further includes a temperature judgment module 40.

[0096] The temperature judgment module 40 is used to determine whether the current temperature value is greater than the preset temperature threshold.

[0097] If the temperature exceeds the preset threshold, the power adjustment module 30 controls the RF generator to stop outputting RF energy and outputs an alarm message.

[0098] If less than or equal to the preset temperature threshold, the temperature rise determination module 20 performs control to determine the current temperature rise rate of the current treatment area according to the current temperature value and the historical temperature data.

[0099] Specifically, if T(K) > T', wherein T' is a preset temperature threshold. The power adjustment module 30 controls the radio frequency generator to stop outputting radio frequency energy, and outputs an alarm information. That is, at this time, the temperature value has exceeded the safety range, in order to ensure to avoid causing damage to the patient, or to avoid greater subsequent harm, it is necessary to stop immediately, and output a prompt information. The output prompt information includes but is not limited to controlling the buzzer alarm, displaying the preset prompt information "temperature out of range", or controlling the display screen of the radio frequency ablation system to flash, etc.

[0100] And if T(K) ≤ T', the temperature rise determination module 20 performs control to determine the current temperature rise rate of the current treatment area according to the current temperature value and the historical temperature data. That is, T(K) is within the treatment temperature range, or does not exceed the preset temperature threshold, according to the technical solutions provided in the first embodiment.

[0101] It can be seen that, in the present embodiment, when the current temperature value is greater than the preset temperature threshold, the power adjustment module 30 controls the radio frequency generator to stop outputting radio frequency energy, and outputs an alarm information, so as to improve the safety of the radio frequency ablation system.

[0102] Based on the above embodiment, the third embodiment of the radio frequency ablation control device of the present application is proposed. Referring to Figure 6 , Figure 6 is a schematic diagram of the modules of the third embodiment of the radio frequency ablation control device of the present application.

[0103] In the present embodiment, the device further comprises: an impedance obtaining module 50, a sequence updating module 60, an impedance change module 70 and a proportion determination module 80.

[0104] The impedance obtaining module 50 is configured to obtain a current impedance value of the current treatment area in a current detection period; the sequence updating module 60 is configured to update an impedance value sequence based on the current impedance value; the impedance value sequence comprises a plurality of impedance values sorted according to the detection periods; the impedance change module 70 is configured to determine an impedance value change amount between any two adjacent impedance values in the impedance value sequence, and obtain an impedance value change amount sequence; the proportion determination module 80 is configured to determine a target change amount greater than a preset impedance value change amount threshold from the impedance value change amount sequence; and the temperature obtaining module is configured to obtain a current temperature value and historical temperature data of the current treatment area if a proportion of the target change amount is less than or equal to a preset proportion threshold.

[0105] Specifically, during the treatment, the impedance detector 4 detects the impedance value of the current treatment area according to a preset impedance detection period, and sends the impedance value to the processor. The impedance acquisition module 50 of the control device configured in the processor can obtain the current impedance value of the current treatment area in the current detection period. Of course, it can be understood that the controller also stores the impedance values sent by the impedance detector 4 in the memory according to the detection time during the treatment, so as to obtain the impedance value sequence. Therefore, after obtaining a new impedance value each time, the sequence updating module 60 is used to update the impedance value sequence based on the current impedance value, that is, to add at the end of the impedance value sequence.

[0106] Then, the impedance change module 70 is used to determine the impedance value change between any two adjacent impedance values in the impedance value sequence, and obtain the impedance value change sequence.

[0107] In an example, for the Kth detection period, the current impedance value is Zn K , and the previous impedance value of the previous detection period is Zn K-1 . The impedance change of the Kth detection period is ΔZn K .

[0108] And ΔZn K = Zn K - Zn K-1 . Thus, the impedance value change sequence composed of a plurality of continuous impedance changes can be obtained: ΔZn1, ΔZn2, …, ΔZn K-1 , ΔZn K .

[0109] From which the target change is screened out, and the target change is ΔZn i , which satisfies ΔZn i > ΔZn0; wherein, 1≤i≤K.

[0110] Wherein, if the proportion m of the target change ΔZn K-1 greater than the preset impedance value change threshold ΔZn0 in ΔZn1, ΔZn2, …, ΔZn K , ΔZn i is less than or equal to the preset proportion threshold n, the temperature acquisition module executes to obtain the current temperature value and the historical temperature data of the current treatment area, that is, executes according to the technical solutions provided in the first and second embodiments of the device.

[0111] Of course, if the proportion m of the target change ΔZn K-1 greater than the preset impedance value change threshold ΔZn0 in ΔZn1, ΔZn2, …, ΔZn K , ΔZn iIf the proportion m of the impedance value is greater than the preset proportion threshold n, the power adjustment module reduces the real-time output power of the radio frequency generator. It can be understood that the power adjustment module specifically how to reduce the real-time output power of the radio frequency generator can refer to the above-mentioned power adjustment module related to the embodiment, which will not be repeated here.

[0112] As an option of the embodiment, the power adjustment module is specifically configured to reduce the real-time output power of the radio frequency generator according to a preset adjustment rate. As in an example, if 8 of the 10 consecutive impedance value changes are greater than ΔZn0, the output power is reduced at a rate of 5%.

[0113] As can be seen, in the embodiment, the output power of the radio frequency generator is adjusted by impedance value detection. Since impedance detection is more accurate and has higher real-time performance than temperature detection, more accurate and reliable temperature control can be achieved.

[0114] Based on the above embodiment, the fourth embodiment of the radio frequency ablation control device of the application is proposed. Referring to Figure 7 , Figure 7 The module schematic diagram of the fourth embodiment of the radio frequency ablation control device of the application is shown in FIG. 8.

[0115] In the embodiment, the device further comprises an impedance judgment module 80.

[0116] The impedance judgment module 80 is configured to judge whether the current impedance value is greater than a preset impedance threshold.

[0117] If it is greater than the preset impedance threshold, the power adjustment module controls the radio frequency generator to stop outputting radio frequency energy and outputs an alarm information. If it is less than the preset impedance threshold, the sequence updating module 60 updates the impedance value sequence based on the current impedance value. The impedance value sequence comprises a plurality of impedance values sorted according to the detection period.

[0118] Specifically, when Zn K > Zn', where Zn' is a preset temperature threshold. The power adjustment module controls the radio frequency generator to stop outputting radio frequency energy and outputs an alarm information. That is, at this time, the current impedance value has exceeded the safe tissue impedance range, so it can be considered that the temperature at this time may also exceed the safe range. In order to ensure that no harm is caused to the patient or to avoid greater subsequent harm, it is necessary to immediately stop and output a reminder information. The output reminder information includes but is not limited to controlling the buzzer to alarm, displaying a preset reminder information "temperature out of range", or controlling the display screen of the radio frequency ablation system to flash, etc.

[0119] If Zn Kif Zn' < Zn, the sequence updating module 60 performs updating the impedance value sequence based on the current impedance value; the impedance value sequence comprises a plurality of impedance values sorted according to detection periods. That is, Zn K When the tissue impedance is within the range, the technical solution provided by the third embodiment is executed.

[0120] Therefore, when the current impedance value is greater than the preset impedance threshold, the power adjusting module controls the radio frequency generator to stop outputting radio frequency energy, and outputs alarm information, so as to improve the safety of the radio frequency ablation system.

[0121] In addition, it should be noted that the apparatus embodiments described above are merely illustrative, and the units illustrated as separate components can or can not be physically separated, and the components illustrated as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. According to actual needs, part or all of the modules can be selected to achieve the purpose of the embodiments. In addition, the connection relationship between the modules in the apparatus embodiments provided by the present application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement it without creative labor.

[0122] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is based on the content of the specification and drawings of the present application, is also included in the patent protection scope of the present application.

Claims

1. A radiofrequency ablation control device, characterized in that, Configured in a radiofrequency ablation system, the radiofrequency ablation system including a radiofrequency generator; The device includes: The temperature acquisition module is used to acquire the current temperature value and historical temperature data of the current treatment area; The temperature rise determination module is used to determine the current temperature rise rate of the current treatment area based on the current temperature value and the historical temperature data. The power adjustment module is used to adjust the real-time output power of the radio frequency generator according to the current temperature rise rate, so that the temperature value of the current treatment area is less than or equal to a preset temperature threshold. The device further includes: Impedance acquisition module, used to acquire the current impedance value of the current treatment area in the current detection cycle; The sequence update module is used to update the impedance value sequence based on the current impedance value; An impedance change module is used to determine the amount of impedance change between any two adjacent impedance values ​​in an impedance value sequence, thereby obtaining an impedance change sequence; the impedance value sequence includes multiple impedance values ​​sorted according to the detection period. The ratio determination module is used to determine the target change amount that is greater than the preset impedance change amount threshold from the impedance change amount sequence. If the percentage of the target change is less than or equal to a preset percentage threshold, the percentage determination module controls the temperature acquisition module to acquire the current temperature value and historical temperature data of the current treatment area.

2. The radiofrequency ablation control device according to claim 1, characterized in that, The temperature rise determination module is specifically used to extract the previous temperature value of the previous detection time adjacent to the current detection time from the historical temperature data; and to determine the temperature rise value of the current temperature value relative to the previous temperature value. The power adjustment module is specifically used to adjust the real-time output power of the radio frequency generator according to the temperature rise value and the preset temperature rise threshold, so that the temperature value of the current treatment area is less than or equal to the preset temperature threshold.

3. The radiofrequency ablation control device according to claim 2, characterized in that, The power adjustment module specifically includes: The temperature rise determination module is used to determine whether the temperature rise value is greater than the preset temperature rise threshold. If the temperature rise exceeds the preset temperature threshold, the first adjustment unit reduces the real-time output power of the radio frequency generator. If the temperature rise is less than or equal to the preset temperature rise threshold, the second adjustment unit adjusts the real-time output power of the radio frequency generator according to the current temperature value and the preset target temperature, wherein the preset target temperature is less than the preset temperature threshold.

4. The radiofrequency ablation control device according to claim 3, characterized in that, The second adjustment unit includes: The temperature difference determination subunit is used to obtain the current temperature deviation value based on the current temperature value and the preset target temperature; The temperature difference judgment subunit is used to determine whether the current temperature deviation value and the previous temperature deviation value at the previous detection time meet a preset condition; wherein, the preset condition is that when the current temperature deviation value is positive, the previous temperature deviation value is negative, or when the current temperature deviation value is negative, the previous temperature deviation value is positive. If the condition is met, the proportional-integral controller will adjust the real-time output power of the radiofrequency ablation system according to the current temperature deviation value using a proportional-integral control method. If the condition is not met, the proportional-integral-derivative (PID) controller will adjust the real-time output power of the RF generator according to the current temperature deviation value using a PID control method.

5. The radiofrequency ablation control device according to claim 1, characterized in that, The device further includes: The temperature judgment module is used to determine whether the current temperature value is greater than the preset temperature threshold. If the temperature exceeds the preset threshold, the power adjustment module controls the RF generator to stop outputting RF energy and outputs an alarm message. If the temperature is less than or equal to the preset temperature threshold, the temperature rise determination module performs control to determine the current temperature rise rate of the current treatment area based on the current temperature value and the historical temperature data.

6. The radiofrequency ablation control device according to claim 1, characterized in that, If the proportion of the target change in the impedance value change sequence is greater than a preset proportion threshold, the proportion determination module controls the power adjustment module to reduce the real-time output power of the RF generator.

7. The radiofrequency ablation control device according to claim 6, characterized in that, The power adjustment module is specifically used to reduce the real-time output power of the radio frequency generator according to a preset adjustment rate.

8. The radiofrequency ablation control device according to claim 1, characterized in that, The device further includes: An impedance determination module is used to determine whether the current impedance value is greater than a preset impedance threshold. If the impedance exceeds the preset threshold, the power adjustment module controls the RF generator to stop outputting RF energy and outputs an alarm message. If the impedance value is less than the preset impedance threshold, the sequence update module performs the step of updating the impedance value sequence based on the current impedance value; the impedance value sequence includes multiple impedance values ​​sorted according to the detection period.

9. A radiofrequency ablation system, characterized in that, include: Radio frequency generator; as well as The radio frequency ablation control device according to any one of claims 1 to 8, wherein the radio frequency ablation control device is connected to the radio frequency generator and is used to control the real-time output power of the radio frequency generator.

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