WO2023124868A1

WO2023124868A1 - Flow rate control method, electronic device and computer-readable storage medium

Info

Publication number: WO2023124868A1
Application number: PCT/CN2022/137404
Authority: WO
Inventors: 徐宏; 颜莹
Original assignee: 杭州堃博生物科技有限公司
Priority date: 2021-12-29
Filing date: 2022-12-08
Publication date: 2023-07-06
Also published as: CN116407247A

Abstract

A flow rate control method, an electronic device and a computer-readable storage medium. The method comprises: acquiring impedance data and temperature data of an operation position of a radio-frequency operation object in real time; obtaining an impedance change parameter according to the impedance data, and obtaining a temperature change parameter according to the temperature data; and adjusting the flow rate of a cooling medium according to the impedance change parameter and the temperature change parameter. Adjustment is performed according to both an impedance change parameter and a temperature change parameter, so as to adjust the flow rate of a cooling medium in a timely manner.

Description

Flow rate control method, electronic device and computer readable storage medium

technical field

The embodiments of the present application relate to the technical field of data processing, and in particular to a flow rate control method, an electronic device, and a computer-readable storage medium.

Background technique

In radiofrequency ablation, under image guidance, the radiofrequency probe enters the operation position of the radiofrequency operation object, and the radiofrequency host sends radiofrequency energy to the operation position to complete the ablation of the operation position. In the process of radiofrequency ablation, a delivery device such as a syringe pump is generally used to deliver a cooling medium (such as physiological saline) to the operating site. By controlling the flow rate of the cooling medium, the temperature of the operating site can be adjusted.

In the related art, the flow rate of the cooling medium is generally adjusted according to the impedance change of the operating position. However, in the initial stage of ablation, the impedance of the operating position does not change much, but the temperature rises rapidly, so that the flow rate of the cooling medium cannot be controlled in time only based on the impedance change.

Contents of the invention

The flow rate control method, electronic device, and computer-readable storage medium provided in the embodiments of the present application can adjust the flow rate of the cooling medium in time according to the impedance variation parameter and the temperature variation parameter.

An embodiment of the present application provides a flow rate control method on the one hand, the method comprising:

Obtain the impedance data and temperature data of the operating position of the radio frequency operating object in real time;

Obtaining a change parameter of impedance according to the impedance data, and obtaining a change parameter of temperature according to the temperature data;

According to the change parameter of the impedance and the change parameter of the temperature, the flow rate of the cooling medium is adjusted.

On the one hand, the embodiment of the present application also provides a flow rate control device, including:

Obtaining module, for obtaining the impedance data and the temperature data of the operation position of radio frequency operation object in real time;

A calculation module, configured to obtain an impedance change parameter according to the impedance data, and obtain a temperature change parameter according to the temperature data;

The control module is configured to adjust the flow rate of the cooling medium according to the change parameter of the impedance and the change parameter of the temperature.

On the one hand, an embodiment of the present application provides an electronic device, including: a memory and a processor;

The memory stores executable program code;

The processor coupled to the memory invokes the executable program code stored in the memory to execute the flow rate control method provided in the above embodiment.

On the one hand, the embodiments of the present application also provide a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is run by a processor, the flow rate control method provided in the above-mentioned embodiments is implemented.

In each embodiment provided by this application, the impedance data and temperature data of the operating position of the radio frequency operation object are obtained in real time; the impedance change parameters are obtained according to the impedance data, and the temperature change parameters are obtained according to the temperature data; The changing parameters are adjusted together, and the flow rate of the cooling medium can be adjusted in time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the application environment diagram of the radiofrequency ablation operation provided by the embodiment of the present application;

2 is a schematic diagram of the top end of the radiofrequency operation catheter in the radiofrequency ablation device provided by the embodiment of the present application;

Fig. 3 is the implementation flow chart of the flow rate control method provided by an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a flow rate control device provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a hardware structure of an electronic device provided by an embodiment of the present application.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of an application scenario of the radio frequency operation ablation operation provided by the embodiment of the present application. The radio frequency host 10 is connected with the syringe pump 20 , the neutral electrode 30 and the radio frequency operation catheter 40 .

Specifically, before performing the operation task, at first, the energy transmitting end of the radio frequency operation catheter 40 for generating and outputting radio frequency energy and the extension tube (not marked in the figure) of the syringe pump 20 are inserted into the operation object 50 (such as an abnormal tissue mass) block). Then, the neutral electrode 30 is brought into contact with the surface of the operation object 50 . The radiofrequency current flows through the radiofrequency operation catheter 40, the operation object 50, and the neutral electrode 30, thereby forming a loop.

When the operation task is triggered, the radio frequency host 10 controls the radio frequency operation catheter 40 to output radio frequency energy to the operation site by way of discharge, so as to perform radio frequency operation on the operation site. At the same time, the syringe pump 20 perfuses the operation object through the extension tube, and pours cooling medium (such as physiological saline) into the operation site to adjust the impedance and temperature of the operation site.

Referring to FIG. 3 , FIG. 3 is a flowchart of an implementation of a flow rate control method provided by an embodiment of the present application. This method can be realized by the radio frequency host 10 in FIG. 1 , or other computer terminals connected thereto. For the convenience of description, the radio frequency host 10 is used as the execution subject in the following embodiments. As shown in Figure 3, the method specifically includes:

Step S301 , acquiring impedance data and temperature data of the operating position of the radio frequency operating object 50 in real time.

As shown in Figure 2, the probes 41 are arranged around the central electrode 42 at the top of the radio frequency operation catheter 40 for outputting radio frequency energy, and are respectively located on different planes, forming a claw structure together, and each probe is provided with physical characteristic data (such as temperature data, impedance data) acquisition device, used to acquire the physical characteristic data of the inserted or touched position.

Specifically, when the radio frequency host 10 controls the radio frequency operation catheter 40 to perform radio frequency operation, the probe contacts the operation position of the radio frequency operation object 50 along with the central electrode.

The radio frequency operation object 50 refers to any object or target that can perform radio frequency operations such as radio frequency ablation. For example, when the radio frequency operation is radio frequency ablation, the radio frequency operation object can be a biological tissue, and the operation position can be an abnormality on the biological tissue. organize.

Step S302 , obtaining impedance variation parameters according to the impedance data, and obtaining temperature variation parameters according to the temperature data.

In the embodiment of the present application, the impedance change parameters include but are not limited to the impedance growth rate within a preset time interval, and the slope of the impedance curve within a preset time interval. The temperature change parameters include but are not limited to the slope of the temperature curve within a preset time interval.

Step S303, adjusting the flow rate of the cooling medium according to the change parameter of impedance and the change parameter of temperature.

In this embodiment, according to the change parameter of impedance and the change parameter of temperature, the cooling medium can be adjusted to a preset flow rate value, and the flow rate of the cooling medium can also be increased by a preset speed-up value on the current flow rate value, or by a preset The deceleration value reduces the flow rate of the cooling medium.

In the embodiment of the present application, the impedance data and temperature data of the operating position of the radio frequency operation object are acquired in real time; the impedance change parameter is obtained according to the impedance data, and the temperature change parameter is obtained according to the temperature data; according to the impedance change parameter and the temperature change parameter Jointly adjusted, the flow rate of the cooling medium can be adjusted in time.

In an embodiment of the present application, adjusting the flow rate of the cooling medium according to the change parameter of impedance and the change parameter of temperature includes:

S401. Comparing an impedance change parameter with a preset impedance parameter to obtain a first comparison result.

In this embodiment, the preset impedance parameters include, but are not limited to, a preset impedance surge gradient value and a preset impedance deceleration threshold. The first comparison result includes but is not limited to that the impedance change parameter is greater than, equal to or less than a preset impedance parameter, for example, the impedance growth rate within a preset time interval is greater than, equal to or less than a preset impedance surge gradient value, and the preset time The impedance slope within the interval is greater than, equal to, or less than a preset impedance deceleration threshold.

S402. Comparing the temperature change parameter with a preset temperature parameter to obtain a second comparison result.

In this embodiment, the preset temperature parameters include but not limited to a preset temperature increase threshold and a preset temperature deceleration threshold. The second comparison result includes but is not limited to that the temperature change parameter is greater than, equal to or less than a preset temperature parameter, for example, the slope of the temperature curve within a preset time interval is greater than, equal to or less than a temperature growth rate threshold.

S403. Adjust the flow rate of the cooling medium according to the first comparison result and the second comparison result.

In this embodiment, according to the first comparison result and the second comparison result, the cooling medium can be adjusted to a preset flow velocity value, or the flow velocity of the cooling medium can be increased according to a preset speed-up value, or decreased according to a preset deceleration value The flow rate of the cooling medium.

In one embodiment, for determining whether to increase the flow rate of the cooling medium and determining whether to decrease the flow rate of the cooling medium, the defined change parameter of impedance, the preset impedance parameter, the change parameter of temperature, and the preset The temperature parameters can be the same or different.

In an embodiment of the present application, adjusting the flow rate of the cooling medium according to the first comparison result and the second comparison result includes:

S501. If the first comparison result is that the impedance change parameter is greater than a preset impedance parameter, increase the flow rate of the cooling medium to a preset flow rate value.

S502. If the first comparison result is that the impedance change parameter is less than or equal to the preset impedance parameter, and the second comparison result is that the temperature change parameter is greater than the preset temperature parameter, increase the flow rate of the cooling medium according to the preset speed increase value .

In one embodiment, increasing the flow rate of the cooling medium may include two stages of coarse adjustment and fine adjustment. Among them, the coarse adjustment can be to directly increase the flow rate of the cooling medium to one of the preset multiple flow rate values, for example, increase according to the above step S501; the fine adjustment can be to increase the cooling rate according to the preset speed increase value. The flow rate of the medium is increased, for example, in the manner of step S502 above.

In this embodiment, the impedance change parameter is the impedance growth rate within a preset time interval, and the preset impedance parameter is a preset impedance surge gradient value. The formula for calculating the impedance growth rate within a preset time interval is:

Among them, K _R is the impedance growth rate within a preset time interval, R ₂ is the current impedance value, R ₁ is the previous impedance value, and the measurement time interval between the current impedance value and the previous impedance value is the preset time interval.

Optionally, the preset flow rate value may be a fixed value, for example fixed at 1ml/min, 2ml/min or 3ml/min. Or, in another embodiment, there can be multiple preset flow velocity values, and different preset flow velocity values can be selected under different circumstances, which will be described in detail below in conjunction with steps S601-S603 and Table 1, and will not be repeated here .

In this embodiment, if it is determined that the impedance change parameter is greater than the preset impedance parameter, the flow rate of the cooling medium is directly increased to the preset flow rate. If it is determined that the impedance change parameter is less than or equal to the preset impedance parameter, the temperature change parameter and the preset temperature parameter are compared again to obtain a second comparison result.

In this embodiment, the temperature change parameter is the slope of the temperature curve within a preset time interval, and the preset temperature parameter is a preset temperature growth rate threshold. Temperature profile slope over preset time intervals

Among them, K _T is the slope of the temperature curve within the preset time interval, T ₂ is the current temperature value, T ₁ is the previous temperature value, and t is the preset time interval. Optionally, the preset speed increase value may be a fixed value, for example, fixed at 0.1ml/min, 0.2ml/min or 0.3ml/min.

Exemplarily, when the preset time interval is 0.2s, the current impedance value is 400Ω, the last impedance value is 380Ω, the impedance surge gradient value is 5%, and the preset flow rate value is 2ml/min. Impedance growth rate over preset time intervals

The impedance growth rate K _R within the preset time interval is greater than 5% of the impedance surge gradient value, which meets the condition that the first comparison result is that the impedance change parameter is greater than the preset impedance parameter, and the flow rate of the cooling medium is adjusted to 2ml/min.

When the preset time interval is 0.5s, the current impedance value is 400Ω, the previous impedance value is 390Ω, the impedance surge gradient value is 5%, the preset flow rate value is 2ml/min, the current temperature value is 38°C, and the previous temperature value The temperature is 36°C, the preset temperature increase threshold is 2, and the preset increase rate value is 0.1ml/min. Impedance growth rate over preset time intervals

If the impedance growth rate K _R within the preset time interval is less than 5% of the impedance surge gradient value, then compare the slope of the temperature curve with the preset temperature growth rate threshold. Calculate the slope of the temperature curve within a preset time interval

The slope of the temperature curve within the preset time interval is greater than 2. It can be seen that the above situation meets the condition that the first comparison result is that the change parameter of impedance is less than or equal to the preset impedance parameter, and the second comparison result is that the change parameter of temperature is greater than the preset temperature parameter, so the speed can be increased according to the preset speed increase value. Increase the flow rate of the cooling medium by 0.1 ml/min.

In this embodiment, comparing the impedance change parameter with the preset impedance parameter to obtain the first comparison result may include the following steps S601-S602:

S601. Obtain the currently set flow rate index number.

In one embodiment, the flow rate index number is a preset value in a preset sequence.

Optionally, the flow rate index number is a preset value in a preset sequence, and the preset sequence may include a plurality of different preset values, each preset value corresponds to an impedance parameter and a flow rate value, and The flow velocity value corresponding to each preset value increases according to the sequence of the preset values in the preset sequence.

As shown in Table 1 below, the preset serial number may include 10 preset values, which are 1, 2, 3.....10. And according to the order of each preset value in the preset sequence, the preset flow rate value corresponding to each preset value increases, for example, the preset flow rate value corresponding to preset value 1 is 0.5ml/min, and the preset value corresponding to preset value 2 The preset flow rate value is 0.7ml/min etc.

Of course, this is just an example, and the preset value included in the preset serial number can also be in other forms, for example, it can be in the form of characters or character strings, such as A, B, C..., etc., which are not limited in this embodiment .

In one embodiment, when the method shown in this embodiment is executed for the first time, the flow rate index number may be the first preset value in the preset sequence, such as 1 in Table 1. In the subsequent execution process, the flow rate index number can be modified, for example, the flow rate index number can be adjusted according to step S604.

S602. Obtain an impedance parameter corresponding to the currently set flow rate index number, and compare an impedance change parameter with the obtained impedance parameter to obtain a first comparison result.

It should be noted that the impedance parameter corresponding to the flow rate index number currently set here is the impedance parameter corresponding to the preset value of the flow rate index number. For example, if the flow rate index number is the preset value 1 in the preset sequence, the corresponding impedance parameter is the impedance parameter corresponding to the preset value 1. Similarly, the preset flow velocity value corresponding to the currently set flow velocity index number described below is also the preset flow velocity value corresponding to the preset value of the flow velocity index number. For example, if the flow rate index number is the preset value 1 in the preset sequence, the corresponding preset flow rate value is the preset flow rate value corresponding to the preset value 1. I won't repeat it later.

In an embodiment, the change parameter of impedance may include a length ratio of impedance within a preset time interval. Correspondingly, the impedance parameter corresponding to the flow rate index number may be the impedance surge gradient shown in Table 1.

It should be noted that here, the impedance parameter corresponding to the currently set flow rate index number can be used as the preset impedance parameter, so that the impedance change parameter can be compared with the preset impedance parameter to obtain the first comparison result.

In this embodiment, increasing the flow rate of the cooling medium to a preset flow rate value may include the following step S603:

S603. Obtain a flow velocity value corresponding to the currently set flow velocity index number, and increase the flow velocity of the cooling medium to the acquired flow velocity value.

In this embodiment, the preset values in the preset sequence can be set as flow rate index numbers with a sequence relationship, for example: 1, 2, 3, 4, 5, 6 . . . . Each flow rate index number is correspondingly set with an impedance surge gradient value and a preset flow rate value, as shown in Table 1.

Table 1

流速索引号Velocity Index Number	阻抗激增梯度值Impedance surge gradient value	预设流速值Preset flow rate value
11	5％5%	0.5ml/min0.5ml/min
22	5％5%	0.7ml/min0.7ml/min
33	10％10%	0.9ml/min0.9ml/min
44	10％10%	1.1ml/min1.1ml/min
55	10％10%	1.2ml/min1.2ml/min
66	5％5%	1.4ml/min1.4ml/min
77	5％5%	1.6ml/min1.6ml/min
88	5％5%	1.8ml/min1.8ml/min
99	5％5%	1.9ml/min1.9ml/min
1010	5％5%	2.0ml/min2.0ml/min

As shown in Table 1, in this embodiment, the preset time interval is still 0.2s, the current impedance value is 400Ω, and the last impedance value is 380Ω. Then it can be determined that the impedance surge gradient value corresponding to the flow rate index number "2" is 5%. Based on this, the impedance growth rate within the preset time interval can be

Compared with the impedance surge gradient value of 5%, the first comparison result is that the impedance growth rate within the preset time interval is greater than the impedance surge gradient value. Thus, the preset flow rate value corresponding to the currently set flow rate index number "2" can be obtained to be 0.7ml/min, and the flow rate value of the cooling medium can be adjusted to 0.7ml/min.

In one embodiment, after adjusting the flow rate of the cooling medium to the obtained flow rate value, it further includes:

S604. Set the flow rate index number as the next preset value in the preset sequence.

Take the above-mentioned acquisition of the currently set flow rate index number as "2" as an example, after the flow rate of the cooling medium is adjusted to the obtained preset flow rate value, set the flow rate index number as the next preset value in the preset sequence" 3".

In the embodiment of the present application, the impedance data and temperature data of the operating position of the radio frequency operation object are acquired in real time; the impedance change parameter is obtained according to the impedance data, and the temperature change parameter is obtained according to the temperature data; according to the impedance change parameter and the temperature change parameter Jointly adjusted, the flow rate of the cooling medium can be adjusted in time. After the flow rate is adjusted in time, it can reduce the occurrence of excessive carbonization, tissue adhesion, and impedance surge at the operating position due to excessive temperature, reduce the frequency of radiofrequency ablation products actively stopping ablation due to the above situations, and also reduce the difficulty of using radiofrequency ablation products .

In one embodiment of the present application, if the first comparison result is that the change parameter of impedance is less than or equal to the preset impedance parameter, and the second comparison result is that the change parameter of temperature is less than or equal to the preset temperature parameter, continue to monitor the impedance Variation parameters and temperature variation parameters.

In the embodiment of the present application, the preset speed-up value may be fixed, or may also be obtained according to the above-mentioned method for obtaining the preset speed-up value, which will not be repeated here.

In the embodiment of the present application, if the impedance growth rate exceeds the maximum impedance surge gradient value, or the temperature slope exceeds the maximum temperature growth rate threshold, the radio frequency host 10 is controlled to stop working.

In the embodiment of the present application, on the one hand, it is divided into two stages of coarse adjustment and fine adjustment, which can not only avoid adjusting the flow rate too slowly to cause the temperature to be too high, but also finely adjust to avoid sudden temperature changes. On the other hand, during rough adjustment, the flow rate value can be gradually adjusted according to the increase of the index number, so as to avoid the rapid increase of the flow rate value and cause the temperature to drop too fast, which will affect the ablation effect.

S701. If the first comparison result is that the impedance change parameter is smaller than the preset impedance parameter, or the second comparison result is that the temperature change parameter is smaller than the preset temperature parameter, reduce the flow rate of the cooling medium according to the preset deceleration value.

In this embodiment, the change parameter of impedance can be compared with the preset impedance parameter first, if the change parameter of impedance is less than the preset impedance parameter, the flow rate of the cooling connection is reduced according to the preset speed, if not less than, Then compare the temperature change parameter with the preset temperature parameter. Alternatively, it is also possible to compare the temperature change parameter with the preset temperature parameter first, and if the temperature change parameter is less than the preset temperature parameter, then slow down to reduce the flow rate connected to the cooling according to the preset, if not less than, then compare Impedance change parameters and preset impedance parameters.

If the first comparison result is that the change parameter of impedance is greater than or equal to the preset impedance parameter, and the second comparison result is that the change parameter of temperature is greater than or equal to the preset temperature parameter, then continue to monitor the change parameter of impedance and the change parameter of temperature .

In this embodiment, the impedance change parameter includes the slope of the impedance curve within a preset time interval, and the preset impedance parameter includes a preset impedance deceleration threshold; the temperature change parameter includes the slope of the temperature curve within a preset time interval, and the preset impedance parameter includes a preset time interval. The set temperature parameters include a preset temperature deceleration threshold.

In one embodiment, the slope of the impedance curve within the preset time interval may be the ratio of the impedance variation within the preset time interval to the preset time interval, for example,

Among them, K _R is the slope of the impedance curve in the preset time interval, R ₂ is the current impedance value, R ₁ is the last impedance value, t is the preset time interval, and the measurement time interval between the current impedance value and the last impedance value is Preset time interval t.

In one embodiment, the slope of the temperature curve in the preset time interval is consistent with the slope of the temperature curve in judging whether to increase the flow rate, which will not be repeated here.

In an embodiment, the preset impedance deceleration threshold may be a fixed value, such as 0.05Ω/min, 0.1Ω/min or 0.2Ω/min, etc. The preset temperature deceleration threshold can also be fixed, for example, it can be 0.5°C/min, 1°C/min, and so on.

In another embodiment, there can also be multiple preset impedance deceleration thresholds, and different impedance deceleration thresholds can be selected in different situations, for example, steps S702-step S706 below:

In one embodiment, the impedance change parameter is compared with a preset impedance parameter to obtain a first comparison result, including:

S702. Obtain the currently set flow rate index number.

S703. Acquire the impedance parameter corresponding to the currently set flow rate index number, and compare the impedance change parameter with the acquired impedance parameter to obtain a first comparison result.

Comparing the temperature change parameter with the preset temperature parameter to obtain a second comparison result, including:

S704. Obtain the currently set flow rate index number.

S705. Obtain a temperature parameter corresponding to the currently set flow rate index number, and compare the temperature change parameter with the obtained temperature parameter to obtain a second comparison result.

Reduce the flow rate of the cooling medium according to preset deceleration values, including:

S706. Obtain a preset deceleration value corresponding to the currently set flow velocity index number, and reduce the flow velocity of the cooling medium according to the preset deceleration value.

For the specific method of the above steps, reference may be made to steps S601-S604, which will not be repeated here.

In one embodiment, after reducing the flow rate of the cooling medium according to the preset deceleration value, it includes:

S707. Obtain the currently set flow velocity index number, and obtain the flow velocity value corresponding to the currently set index number; if the reduced flow velocity of the cooling medium is less than the obtained flow velocity value, set the flow velocity index number to the preset sequence previous preset value.

In an embodiment, the flow rate index number here may be the same as the flow rate index number in steps S601-S604.

In the embodiment of the present application, after increasing the flow rate according to the coarse adjustment method, the flow rate index number can be set to the next preset value in the preset sequence, so that the determined preset flow rate is the flow rate corresponding to the next preset value ( That is, the preset flow rate increases); after the flow rate is increased according to the fine adjustment method, the flow rate index number remains unchanged. After reducing the flow rate according to the above method, if the flow rate decreases too much, that is, the reduced flow rate is lower than the flow rate value corresponding to the current index number, then when increasing the flow rate later, it cannot be gradually increased according to the flow rate value corresponding to each index number, resulting in The flow rate value increases suddenly, so if the flow rate decreases too much (that is, the reduced flow rate is less than the flow rate value corresponding to the current index number), you can set the index number to the previous preset value in the preset sequence to ensure that When the flow rate is increased subsequently, the flow rate corresponding to each preset value is gradually increased, and there will be no sudden increase in the flow rate value.

Referring to FIG. 4 , it is a schematic structural diagram of a flow rate control device provided by an embodiment of the present application. For ease of description, only the parts related to the embodiment of the present application are shown. The device may be a computer terminal, or a software module configured on the computer terminal. As shown in FIG. 5 , the device includes: an acquisition module 101 , a calculation module 102 and a control module 103 .

The acquiring module 101 is configured to acquire impedance data and temperature data of an operating position of a radio frequency operating object in real time.

The calculation module 102 is configured to obtain an impedance change parameter according to the impedance data, and obtain a temperature change parameter according to the temperature data.

The control module 103 is configured to adjust the flow rate of the cooling medium according to the change parameter of the impedance and the change parameter of the temperature.

Further, the control module 103 is also used to compare the impedance change parameter with a preset impedance parameter to obtain a first comparison result; compare the temperature change parameter with a preset temperature parameter to obtain a second Comparing the result: adjusting the flow rate of the cooling medium according to the first comparison result and the second comparison result.

In an embodiment of the present application, the control module 103 is further configured to increase the flow rate of the cooling medium to a preset value if the first comparison result is that the change parameter of the impedance is greater than the preset impedance parameter. Flow rate value; if the first comparison result is that the change parameter of the impedance is less than or equal to the preset impedance parameter, and the second comparison result is that the temperature change parameter is greater than the preset temperature parameter , to increase the flow rate of the cooling medium according to a preset increase rate value.

Further, the control module 103 is also used to obtain the currently set flow rate index number, the flow rate index number is a preset value in the preset sequence; each preset value in the preset sequence corresponds to an impedance parameter and a flow rate value, And the flow velocity value corresponding to each preset value increases according to the order of the preset value in the preset sequence; acquire the impedance parameter corresponding to the currently set flow velocity index number, and compare the change parameter of the impedance with the acquired The obtained impedance parameters are compared to obtain a first comparison result.

The control module 103 is further configured to acquire a flow velocity value corresponding to the currently set flow velocity index number, and increase the flow velocity of the cooling medium to the acquired flow velocity value.

Further, the control module 103 is further configured to set the flow rate index number as the next preset value in the preset sequence.

In this embodiment, the impedance change parameter includes the impedance growth rate within a preset time interval, and the preset impedance parameter includes a preset impedance surge gradient value; the temperature change parameter includes the impedance growth rate within a preset time interval. The slope of the temperature curve, the preset temperature parameter includes a preset temperature growth rate threshold.

In this embodiment, the impedance data and temperature data of the operating position of the radio frequency operation object are acquired in real time; the impedance change parameter is obtained according to the impedance data, and the temperature change parameter is obtained according to the temperature data; and the impedance change parameter and the temperature change parameter are jointly adjusted, The flow rate of the cooling medium can be adjusted in time. After the flow rate is adjusted in time, it can reduce the occurrence of excessive carbonization, tissue adhesion, and impedance surge at the operating position due to excessive temperature, reduce the frequency of radiofrequency ablation products actively stopping ablation due to the above situations, and also reduce the difficulty of using radiofrequency ablation products .

In an embodiment of the present application, the control module 103 is further configured to: if the first comparison result is that the change parameter of the impedance is less than the preset impedance parameter, or if the second comparison result is the change parameter of the temperature If the change parameter is smaller than the preset temperature parameter, the flow rate of the cooling medium is reduced according to a preset deceleration value.

Further, the control module 103 is also configured to obtain the currently set flow rate index number, which is a preset value in a preset sequence; obtain the impedance parameter corresponding to the currently set flow rate index number , and compare the change parameter of the impedance with the obtained impedance parameter to obtain a first comparison result.

Further, the control module 103 is also used to obtain the currently set flow rate index number; obtain the temperature parameter corresponding to the currently set flow rate index number, and compare the temperature change parameter with the obtained The above temperature parameters are compared to obtain a second comparison result.

Further, the control module 103 is further configured to acquire a deceleration value corresponding to the currently set flow rate index number, and reduce the flow rate of the cooling medium according to the deceleration value.

Further, the control module 103 is also used to obtain the currently set flow rate index number, and obtain the flow rate value corresponding to the currently set flow rate index number, if the reduced flow rate of the cooling medium is smaller than the obtained flow rate value, Then set the flow rate index number as the last preset value in the preset sequence.

In this embodiment, the change parameter of impedance includes the slope of the impedance curve within a preset time interval, and the preset impedance parameter includes a preset impedance deceleration threshold; the change parameter of temperature includes the temperature within a preset time interval Curve slope, the preset temperature parameters include a preset temperature deceleration threshold.

For the specific process of realizing the respective functions of the above-mentioned modules, reference may be made to the relevant content in the embodiment shown in the above-mentioned flow rate control method, which will not be repeated here.

In this embodiment, the impedance data and temperature data of the operating position of the radio frequency operation object are acquired in real time; the impedance change parameter is obtained according to the impedance data, and the temperature change parameter is obtained according to the temperature data; and the impedance change parameter and the temperature change parameter are jointly adjusted, The flow rate of the cooling medium can be adjusted in time.

Referring to FIG. 5 , FIG. 5 is a schematic diagram of a hardware structure of an electronic device provided by an embodiment of the present application.

Exemplarily, an electronic device may be any of various types of computer system devices that are non-removable or removable or portable and that perform wireless or wired communications. Specifically, the electronic device can be a desktop computer, a server, a mobile phone or a smart phone (for example, based on iPhone TM, a phone based on Android TM), a portable game device (such as Nintendo DS TM, PlayStation Portable TM, Gameboy Advance TM, iPhone TM), laptop computers, PDAs, portable Internet devices, portable medical devices, smart cameras, music players and data storage devices, other handheld devices and such as watches, earphones, pendants, earphones, etc., electronic devices can also be other Wearable devices (eg, such as electronic glasses, electronic clothes, electronic bracelets, electronic necklaces, and other head-mounted devices (HMDs)).

As shown in FIG. 5 , electronic device 100 may include control circuitry, which may include storage and processing circuitry 300 . The storage and processing circuitry 300 may include memory, such as hard disk drive memory, non-volatile memory (such as flash memory or other electronically programmable limited-erasable memory for forming solid-state drives, etc.), volatile memory (such as static or dynamic Random access memory, etc.), etc., are not limited in this embodiment of the present application. Processing circuitry in storage and processing circuitry 300 may be used to control the operation of electronic device 100 . The processing circuit may be implemented based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, display driver integrated circuits, and the like.

The storage and processing circuit 300 can be used to run software in the electronic device 100, such as Internet browsing applications, Voice over Internet Protocol (Voice over Internet Protocol, VOIP) phone calling applications, email applications, media playback applications, operating system functions wait. These software can be used to perform control operations such as camera based image acquisition, ambient light measurement based on ambient light sensor, proximity sensor based measurement based on proximity sensor, information based on status indicators such as status indicators such as LEDs Display functions, touch sensor based touch event detection, functions associated with displaying information on multiple (e.g. layered) displays, operations associated with performing wireless communication functions, operations associated with collecting and generating audio signals , control operations associated with collecting and processing button press event data, and other functions in the electronic device 100 are not limited by this embodiment of the present application.

Further, the memory stores executable program codes, and the processor coupled to the memory invokes the executable program codes stored in the memory to execute the flow rate control methods described in the foregoing embodiments.

Wherein, the executable program code includes various modules in the flow rate control device described in the above embodiment shown in FIG. 4 , for example: acquisition module 101 , calculation module 102 , control module 103 and so on. For the specific process of the above-mentioned modules realizing their respective functions, reference may be made to the relevant description in FIG. 4 , which will not be repeated here.

The electronic device 100 may also include an input/output circuit 420 . The input/output circuit 420 can be used to enable the electronic device 100 to realize data input and output, that is, allow the electronic device 100 to receive data from external devices and also allow the electronic device 100 to output data from the electronic device 100 to external devices. The input/output circuit 420 may further include the sensor 320 . The sensor 320 can include an ambient light sensor, a proximity sensor based on light and capacitance, a touch sensor (for example, based on an optical touch sensor and/or a capacitive touch sensor, wherein the touch sensor can be a part of the touch screen or can be used as a The touch sensor structure is used independently), the acceleration sensor, and other sensors, etc.

Input/output circuitry 420 may also include one or more displays, such as display 140 . The display 140 may include one or a combination of liquid crystal displays, organic light emitting diode displays, electronic ink displays, plasma displays, and displays using other display technologies. Display 140 may include a touch sensor array (ie, display 140 may be a touchscreen display). The touch sensor may be a capacitive touch sensor formed from an array of transparent touch sensor electrodes such as indium tin oxide (ITO) electrodes, or may be a touch sensor formed using other touch technologies such as acoustic touch, pressure sensitive touch, resistive touch Touch, optical touch, etc. are not limited in this embodiment of the application.

The electronic device 100 may also include an audio component 360 . The audio component 360 may be used to provide audio input and output functions for the electronic device 100 . The audio components 360 in the electronic device 100 may include speakers, microphones, buzzers, tone generators, and other components for generating and detecting sounds.

The communication circuit 380 can be used to provide the electronic device 100 with the ability to communicate with external devices. Communications circuitry 380 may include analog and digital input/output interface circuitry, and wireless communications circuitry based on radio frequency energy and/or optical signals. Wireless communication circuitry in communication circuitry 380 may include radio frequency transceiver circuitry, power amplifier circuitry, low noise amplifiers, switches, filters, and antennas. For example, the wireless communication circuit in the communication circuit 380 may include a circuit for supporting Near Field Communication (NFC) by transmitting and receiving near-field coupled electromagnetic signals. For example, communication circuitry 380 may include a near field communication antenna and a near field communication transceiver. Communications circuitry 380 may also include cellular telephone transceiver circuitry and antennas, wireless local area network transceiver circuitry and antennas, and the like.

The electronic device 100 may further include a battery, a power management circuit and other input/output units 400 . The input/output unit 400 may include buttons, joystick, click wheel, scroll wheel, touch pad, keypad, keyboard, camera, light emitting diodes and other status indicators, and the like.

A user can input commands through the I/O circuit 420 to control the operation of the electronic device 100 , and can use the output data of the I/O circuit 420 to receive status information and other outputs from the electronic device 100 .

Further, the embodiment of the present application also provides a non-transitory computer-readable storage medium, which can be configured in the server in each of the above-mentioned embodiments, and the non-transitory computer-readable storage medium A computer program is stored on the medium, and when the program is executed by the processor, the flow rate control methods described in the foregoing embodiments are implemented.

In the above-mentioned embodiments, the descriptions of each embodiment have their own emphases, and for parts that are not detailed or recorded in a certain embodiment, refer to the relevant descriptions of other embodiments.

Those skilled in the art can appreciate that the modules/units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed device/terminal and method may be implemented in other ways. For example, the device/terminal embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

A unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the methods of the above embodiments, and may also be completed by instructing related hardware through computer programs. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the above-mentioned various method embodiments can be realized. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access Memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained on computer readable media may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer readable media does not include It is an electrical carrier signal and a telecommunication signal.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still be described in the foregoing embodiments Modifications to the technical solutions, or equivalent replacement of some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of the technical solutions of the present invention. within the scope of protection.

Claims

A flow rate control method, characterized in that the method comprises:

Obtain the impedance data and temperature data of the operating position of the radio frequency operating object in real time;

Obtaining a change parameter of impedance according to the impedance data, and obtaining a change parameter of temperature according to the temperature data;

According to the change parameter of the impedance and the change parameter of the temperature, the flow rate of the cooling medium is adjusted.
The method according to claim 1, wherein the adjusting the flow rate of the cooling medium according to the change parameter of the impedance and the change parameter of the temperature comprises:

Comparing the change parameter of the impedance with a preset impedance parameter to obtain a first comparison result;

Comparing the change parameter of the temperature with a preset temperature parameter to obtain a second comparison result;

The flow rate of the cooling medium is adjusted according to the first comparison result and the second comparison result.
The method according to claim 2, wherein the adjusting the flow rate of the cooling medium according to the first comparison result and the second comparison result comprises:

If the first comparison result is that the change parameter of the impedance is greater than the preset impedance parameter, increasing the flow rate of the cooling medium to a preset flow rate value;

If the first comparison result is that the change parameter of the impedance is less than or equal to the preset impedance parameter, and the second comparison result is that the temperature change parameter is greater than the preset temperature parameter, according to the preset The speed increase value is set to increase the flow velocity of the cooling medium.
The method according to claim 3, wherein the comparing the change parameter of the impedance with the preset impedance parameter to obtain a first comparison result comprises:

Get the current set flow rate index number;

Acquire the impedance parameter corresponding to the currently set flow rate index number, and compare the impedance change parameter with the acquired impedance parameter to obtain a first comparison result;

The increasing the flow rate of the cooling medium to a preset flow rate value includes:

Obtain a flow velocity value corresponding to the currently set flow velocity index number, and increase the flow velocity of the cooling medium to the acquired flow velocity value.
The method according to claim 4, wherein the flow velocity index number is a preset value in a preset sequence; each preset value in the preset sequence corresponds to an impedance parameter and a flow velocity value respectively , and the flow rate value corresponding to each of the preset values increases according to the order of the preset values in the preset sequence;

After said increasing the flow velocity of the cooling medium to the obtained flow velocity value, it also includes:

The flow rate index number is set to the next said preset value in said preset sequence.
The method according to any one of claims 2 to 5, wherein the impedance change parameter includes an impedance growth rate within a preset time interval, and the preset impedance parameter includes a preset impedance surge gradient value The temperature change parameter includes the slope of the temperature curve within a preset time interval, and the preset temperature parameter includes a preset temperature growth rate threshold.
The method according to claim 2, wherein the adjusting the flow rate of the cooling medium according to the first comparison result and the second comparison result comprises:

If the first comparison result is that the change parameter of the impedance is less than the preset impedance parameter, or the second comparison result is that the temperature change parameter is less than the preset temperature parameter, then according to the preset The deceleration value reduces the flow rate of the cooling medium.
The method according to claim 7, wherein said comparing said impedance change parameter with a preset impedance parameter to obtain a first comparison result comprises:

Get the current set flow rate index number;

Acquire the impedance parameter corresponding to the currently set flow rate index number, and compare the impedance change parameter with the acquired impedance parameter to obtain a first comparison result;

The step of comparing the change parameter of the temperature with the preset temperature parameter to obtain a second comparison result includes:

Obtain the flow rate index number currently set;

Obtaining a temperature parameter corresponding to the currently set flow rate index number, and comparing the temperature change parameter with the obtained temperature parameter to obtain a second comparison result;

The reducing the flow rate of the cooling medium according to the preset deceleration value includes:

A deceleration value corresponding to the currently set flow velocity index number is obtained, and the flow velocity of the cooling medium is reduced according to the deceleration value.
The method according to claim 7 or 8, wherein the method further comprises:

Obtain the currently set flow rate index number, the flow rate index number is a preset value in the preset sequence, and the flow rate index number is a preset value in the preset sequence; The preset values respectively correspond to an impedance parameter and a flow velocity value, and the flow velocity values corresponding to each of the preset values increase according to the order of the preset values in the preset sequence;

Obtain the flow velocity value corresponding to the currently set flow velocity index number;

If the reduced flow rate of the cooling medium is smaller than the obtained flow rate value, the flow rate index number is set as the last preset value in the preset sequence.
The method according to any one of claims 7 to 9, wherein the impedance change parameter includes the slope of the impedance curve within a preset time interval, and the preset impedance parameter includes a preset impedance deceleration threshold; The temperature change parameter includes a temperature curve slope within a preset time interval, and the preset temperature parameter includes a preset temperature deceleration threshold.
A flow rate control device, characterized in that it comprises:

An acquisition module, configured to acquire impedance data and temperature data of the operating position of the radio frequency operating object in real time;

A calculation module, configured to obtain an impedance change parameter according to the impedance data, and obtain a temperature change parameter according to the temperature data;

The control module is configured to adjust the flow rate of the cooling medium according to the change parameter of the impedance and the change parameter of the temperature.
An electronic device, characterized in that it comprises:

memory and processor;

The memory stores executable program code;

The processor coupled to the memory invokes the executable program code stored in the memory to execute the steps in the flow rate control method according to any one of claims 1 to 10.
A non-transitory computer-readable storage medium on which a computer program is stored, wherein when the computer program is executed by a processor, the flow rate control method according to any one of claims 1 to 10 is realized .