CN114404030B - High-frequency electric knife operation control device and high-frequency electric knife system - Google Patents
High-frequency electric knife operation control device and high-frequency electric knife system Download PDFInfo
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- 238000001035 drying Methods 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 9
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- 238000002474 experimental method Methods 0.000 claims description 3
- 230000002792 vascular Effects 0.000 abstract description 28
- 230000023597 hemostasis Effects 0.000 abstract description 6
- 230000001276 controlling effect Effects 0.000 description 18
- 230000008569 process Effects 0.000 description 9
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
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- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
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- 230000000740 bleeding effect Effects 0.000 description 3
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- 230000033228 biological regulation Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
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- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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- A61B2018/00345—Vascular system
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- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00642—Sensing and controlling the application of energy with feedback, i.e. closed loop control
- A61B2018/00648—Sensing and controlling the application of energy with feedback, i.e. closed loop control using more than one sensed parameter
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- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/1206—Generators therefor
- A61B2018/1246—Generators therefor characterised by the output polarity
- A61B2018/126—Generators therefor characterised by the output polarity bipolar
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Abstract
The application relates to a high-frequency electric knife operation control device and a high-frequency electric knife system, which can obtain an optimal voltage curve by least square fitting of output electric parameters of a knife in a working state of the high-frequency electric knife when the high-frequency electric knife is operated, and then realize dynamic following and adjustment when the frequency of the knife changes by acquiring the output current parameters of the knife and carrying out matching analysis with the optimal voltage curve, so that the knife is in a running state. According to the scheme, the voltage curve is fitted by the least square method, so that quick and high-precision frequency tracking and adjustment are realized, the realization speed of heating and maintaining work can be effectively improved, and quick and complete vascular closure and hemostasis operation can be realized within 3-4 seconds.
Description
Technical Field
The application relates to the technical field of electrosurgical operation equipment, in particular to a high-frequency electrotome operation control device and a high-frequency electrotome system.
Background
The high-frequency electrotome (High Frequency Electrosurgical Equipment) is an electrosurgical instrument for tissue cutting instead of a mechanical scalpel, and heats the tissue when the high-frequency high-voltage current generated by the tip of the effective electrode contacts with the body, so as to separate and coagulate the body tissue, thereby achieving the purposes of cutting and stopping bleeding. According to different working modes, the high-frequency monopolar electric knife and the high-frequency bipolar electric knife can be divided.
At present, a high-frequency bipolar electrotome with the frequency of 500KHZ is a relatively common and advanced vascular closure operation device in the medical industry, and the main function is to quickly stop bleeding and coagulate after the excision operation. However, in the working process of the high-frequency bipolar electrotome, voltage and current are sampled, calculated and regulated, and when output power is dynamically regulated and controlled, the high-frequency bipolar electrotome is not accurate and efficient enough, so that blood vessel closure is not complete enough, blood stains exist on a wound after operation, and the dryness is not enough, so that the operation effect is poor. Therefore, the traditional dynamic adjustment and control of the output power of the high-frequency bipolar electrotome has the problems of low accuracy and low efficiency.
Disclosure of Invention
Based on the above, it is necessary to provide a high-frequency electric knife operation control device and a high-frequency electric knife system for solving the problems of low accuracy and insufficient efficiency in the conventional dynamic adjustment and control of the output power of the high-frequency bipolar electric knife.
A high-frequency electric knife operation control method comprises the following steps: performing least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter to obtain an optimal voltage curve; obtaining an output current parameter of the cutter; and carrying out frequency following and adjustment on the cutter according to the output current parameter and the optimal voltage curve so as to control the cutter to carry out heating and maintaining work.
In one embodiment, after the step of obtaining the output current parameter of the tool during operation, the method further includes: searching the output current parameters by adopting a dichotomy method, and determining an optimal power output range section; and controlling the cutter to enter different grades of drying and solidifying working states according to the optimal power output range section.
In one embodiment, the step of searching the output current parameter by using a dichotomy to determine the optimal power output range segment includes: searching and positioning the output current parameter by adopting a dichotomy method to obtain a maximum current value; and obtaining an output voltage parameter corresponding to the maximum current value, and obtaining an optimal power output range section according to the maximum current value and the output voltage parameter.
In one embodiment, said controlling said tool into different levels of drying and coagulation operating conditions according to said optimum power output range segment comprises: and the optimal power output range section is adjusted to maintain different times so as to enable the cutter to enter different levels of drying and solidification working states.
In one embodiment, the step of performing least square fitting according to the output electrical parameter of the tool in the working state of the high-frequency electric tool to obtain the optimal voltage curve includes: obtaining different current sampling values and voltage sampling values of a high-frequency electric knife in a cutter simulation cutting tissue running state; and selecting any two groups of current sampling values and corresponding voltage sampling values to perform least square fitting to obtain an optimal voltage curve.
In one embodiment, the least square fitting is performed according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter, before the step of obtaining the optimal voltage curve, the method further comprises the following steps: detecting whether a cutter of the high-frequency electric knife is in an access state or not; outputting an equipment abnormality alarm signal when the cutter is not in an access state; and when the cutter is in the access state, executing the step of performing least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter to obtain an optimal voltage curve.
In one embodiment, after the step of obtaining the output current parameter of the tool, the method further includes: acquiring output voltage parameters of the cutter; and carrying out overvoltage and overcurrent protection on the high-frequency electrotome according to the output current parameter and the output voltage parameter.
In one embodiment, after the step of frequency following and adjusting the tool according to the output current parameter and the optimal voltage curve to control the tool to perform the heating maintenance operation, the method further comprises: detecting whether the heating maintaining work is abnormal; when the heating maintenance work is abnormal, outputting a work abnormality alarm signal;
And/or, after the step of performing frequency following and adjustment on the cutter according to the output current parameter and the optimal voltage curve to control the cutter to perform heating and maintaining operation, the method further comprises: and detecting whether the heating maintaining operation is completed.
A high frequency electric knife operation control device, comprising: the optimal voltage curve fitting module is used for carrying out least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter to obtain an optimal voltage curve; the output current parameter acquisition module is used for acquiring the output current parameters of the cutter; and the heating and maintaining control module is used for carrying out frequency following and adjustment on the cutter according to the output current parameter and the optimal voltage curve so as to control the cutter to carry out heating and maintaining work.
The high-frequency electric knife system comprises a knife and a host, wherein the knife is connected with the host through a shielding cable, and the host is used for controlling the operation of the knife according to the high-frequency electric knife operation control method.
According to the high-frequency electric knife operation control device and the high-frequency electric knife system, when the high-frequency electric knife operates, the output electric parameters of the knife in the working state of the high-frequency electric knife can be subjected to least square fitting to obtain the optimal voltage curve, and then the output current parameters of the knife are obtained and matched with the optimal voltage curve for analysis, so that dynamic following and adjustment when the frequency of the knife changes are realized, and the knife is in a running state. According to the scheme, the voltage curve is fitted by the least square method, so that quick and high-precision frequency tracking and adjustment are realized, the realization speed of heating and maintaining work can be effectively improved, and quick and complete vascular closure and hemostasis operation can be realized within 3-4 seconds.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a flow chart of a method for controlling operation of a high frequency electric knife according to an embodiment;
FIG. 2 is a schematic diagram of a high frequency electrotome system according to one embodiment;
FIG. 3 is a schematic diagram of a high frequency electrotome system in another embodiment;
FIG. 4 is a flow chart of a method for controlling operation of a high frequency electric knife according to another embodiment;
FIG. 5 is a flow chart of a method for controlling operation of a high frequency electric knife according to another embodiment;
FIG. 6 is a flow chart of a method for controlling operation of a high frequency electric knife according to another embodiment;
FIG. 7 is a schematic diagram of waveforms of output voltages of a tool according to an embodiment;
FIG. 8 is a flow chart of a method for controlling operation of a high frequency electric knife according to another embodiment;
FIG. 9 is a schematic diagram of a waveform of a cutter output current according to an embodiment;
FIG. 10 is a flow chart of a method for controlling operation of a high frequency electric knife according to another embodiment;
FIG. 11 is a flow chart of the operation of the high frequency electrotome in one embodiment;
FIG. 12 is a flow chart of a method for controlling operation of a high frequency electric knife according to yet another embodiment;
FIG. 13 is a schematic diagram of a high frequency electric knife operation control device according to an embodiment;
FIG. 14 is a schematic view of a high frequency electric knife operation control device in another embodiment;
FIG. 15 is a schematic view of a high frequency electric knife operation control device in accordance with another embodiment;
FIG. 16 is a schematic view of a control device for controlling operation of a high-frequency electric knife according to still another embodiment;
fig. 17 is a schematic structural view of a high-frequency electric knife operation control device in yet another embodiment.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, a method for controlling operation of a high frequency electric knife includes steps S300, S400 and S500.
And step S300, performing least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter to obtain an optimal voltage curve.
Specifically, the optimal voltage curve represents the corresponding relation between the output current parameter and the output voltage parameter of the cutter under the condition that the output power of the main machine of the high-frequency electric cutter is constant. The high-frequency electric knife may be classified into a high-frequency monopolar electric knife and a high-frequency bipolar electric knife according to the operation mode, and for convenience of understanding of various embodiments of the present application, the following high-frequency electric knife may be understood as a high-frequency bipolar electric knife. Referring to fig. 2 in combination, the high-frequency electric knife includes a knife and a main unit, and the connection between the main unit and the knife is realized by a high-material shielding cable. The cutter part is used for being contacted with a patient to realize operations such as focus cutting, vascular closing and the like, and the host computer is used for carrying out different power output on the cutter to control the cutter to realize operations such as vascular closing and the like.
The high-frequency electric knife operation control method provided by the application is realized in the host machine of the high-frequency electric knife, and the specific structure of the host machine is not unique. In one embodiment, referring to fig. 3 in combination, the host includes a processor (specifically, a micro control unit, etc.), a voltage sampling module, a current sampling module, a frequency adjusting module, and a power output module, where the voltage sampling module, the current sampling module, the frequency adjusting module, and the power output module are respectively connected to the processor, and the voltage sampling module, the current sampling module, and the power output module are all connected to the tool. The voltage sampling module and the current sampling module are used for collecting output voltage parameters and output current parameters of the cutter and sending the output voltage parameters and the output current parameters to the processor for analysis, the frequency adjusting module analyzes according to the output voltage parameters and the output current parameters fed back in real time, frequency tracking and dynamic adjustment are achieved, and the power output module comprises photoelectric isolation and transformer output and generates high-frequency 500KHZ energy signals.
The cutter comprises a cutter head, a pinching handle and a starting switch, wherein the cutter head is provided with a bipolar wiring structure, the pinching handle comprises a cutter blade cutting handle and a pinching locking handle, the cutter blade cutting handle is mainly used for separating tissues after single closing, the pinching handle is used for clamping and pinching target tissues and organs in a body, and the starting switch is used for starting single vascular closing operation.
It should be noted that the obtaining of the output electrical parameter of the tool in the working state of the high-frequency electric tool may be, in an embodiment, actually controlling the operation of the high-frequency electric tool, by collecting the output electrical parameter of the tool. In another embodiment, the output electric parameters in the simulated operation state can be acquired by simulating the operation state of the high-frequency electric knife. After the host computer of the high-frequency electric knife obtains the output electric parameters, the output electric parameters are subjected to least square fitting, and finally an optimal voltage curve representing the corresponding relation between the output current parameters and the output voltage parameters is obtained.
Step S400, obtaining output current parameters of the cutter.
Specifically, after the host obtains the optimal voltage curve, in the actual running process of the high-frequency electric knife, the output current parameter acquisition operation in the running process of the knife is performed in real time through the current sampling module in the host, and the acquired output current parameter is sent to the processor in the host so as to perform subsequent running control.
And S500, carrying out frequency following and adjustment on the cutter according to the output current parameter and the optimal voltage curve so as to control the cutter to carry out heating and maintaining work.
Specifically, the heating and keeping work, namely the cutter head continuously heats, burns the focus part after cutting to perform hemostasis and coagulation operation, namely vascular closure operation. After obtaining the output current parameter, the processor of the host machine performs matching analysis on the output current parameter and an optimal voltage curve, and under the condition of constant output power, the processor adjusts the working voltage of the cutter of the high-frequency electric cutter by adjusting the output of the DAC signal, so that dynamic following under the condition of cutter frequency change is realized. According to the technical scheme, the rapid frequency tracking and adjustment are realized by adopting a least square method, so that the method has the advantages of higher vascular closure speed, good effect and stable working voltage and current compared with the traditional product in the market.
Referring to fig. 4, after step S400, the method further includes step S600 and step S700.
Step S600, searching output current parameters by adopting a dichotomy method, and determining an optimal power output range section; and step S700, controlling the cutter to enter different grades of drying and solidification states according to the optimal power output range section.
Specifically, in the process of starting operation of the high-frequency electric knife, the current acquisition module of the host machine can acquire output current parameters in real time and send the output current parameters to the processor of the host machine. After obtaining the current parameter of one acquisition period, the processor of the host computer searches each current parameter by adopting a dichotomy method to determine a corresponding optimal power output range section, namely a range section corresponding to the maximum working current of the cutter. In the subsequent heat-up holding stage, the DAC output current of the processor is fine-tuned according to the optimum power output range segment to maintain the duration of the optimum power output range segment, thereby enabling the cutter to operate at different levels of dryness and solidification. Accordingly, the longer the duration, the higher the dryness and coagulation grade, and when too high between durations, the focus resistance may even burn. Thus, during actual operation, the duration of the heat hold is typically in the range of 1-2 seconds, and as for the specific length of hold, different settings are made depending on the desired dryness and coagulation grade.
Further, in one embodiment, referring to fig. 5 or 6, step S600 includes step S610 and step S620, and step S700 includes step S710.
Step S610, searching and positioning the output current parameters by adopting a dichotomy method to obtain a maximum current value; step S620, obtaining an output voltage parameter corresponding to the maximum current value, and obtaining an optimal power output range section according to the maximum current value and the output voltage parameter. Step S710, maintaining the cutter in different levels of drying and solidification operation by adjusting the optimum power output range section for different times.
Specifically, referring to fig. 9 in combination, the rectangular area is the section of the optimal power output range corresponding to the optimal power point in the output current waveform of the high-frequency electric knife, and the area can regulate the dryness and the solidification effect of the vascular closure in a grading manner. The present embodiment employs a binary search algorithm to identify the optimal power point for maximum current. The method comprises the steps of storing output current parameters sampled at high speed by using a dynamic array, searching the maximum value in the numerical value according to a sampling period, adopting a classical binary search algorithm in the searching process, realizing quick positioning of the maximum current value, searching the maximum current value of the vascular closure once the current value is found to show a descending trend, and calculating by combining the maximum current value and the corresponding output voltage sampling value under the maximum current value to obtain the optimal power, wherein the position corresponding to the maximum current value is used as an optimal power point, the optimal power point can be represented by the maximum current value, and the optimal power after calculation can be represented according to the maximum current value.
The specific manner in which the optimum power output segment is derived from the optimum power point is not exclusive, and in one embodiment, a maximum current value of 3A is illustrated. When the output current parameter 3A (the error size within the positive and negative 100mA range can be set according to the actual situation) obtained by the processor of the host computer, the output regulation of the DAC output by the processor needs to be stopped at the moment, and the output of the current voltage and current is kept, so that the cutter output is kept in a heating state relatively within a 100mA variation range. The longer the holding time is, the greater the dryness of the tissue cut, but the longer the holding time is, the longer the time is, and the focal tissue is burned. In a more detailed embodiment, 1-2 seconds may be equally divided into 3 dry grades, where the current sampling module and voltage sampling module of the processor are required to constantly sample the voltage and current in real time, and if a drop in current is found, the DAC output of the processor is trimmed to bring the current back to the previous constant value (or to 3A) so that the collected output current parameter is always within 3a±100mA, i.e. the optimum power output range segment.
According to the technical scheme, a least square and binary search algorithm is combined, so that quick frequency tracking and adjustment are realized, the high-frequency bipolar electric knife can be searched and adjusted to work in an optimal power output range section corresponding to the optimal voltage and current, corresponding dryness and solidification effects can be dynamically set in a grading mode, and the high-frequency bipolar electric knife has high working reliability.
In one embodiment, the optimal power value is obtained by: scanning up and down according to the output voltage parameters to obtain a current average value of current values, wherein the difference value between the current average value and the maximum current value is within a preset difference value threshold value within preset time; and obtaining the optimal power value according to the voltage average value and the current average value of the voltage values corresponding to the current values.
Specifically, in the solution of this embodiment, the optimal power point is represented by the optimal power value corresponding to the maximum current value. In the embodiment, the optimal power value is not simply the product of the maximum current and the maximum voltage, and the maximum current value is 3A, the preset difference threshold is 50mA, and the preset time is 150 ms. When the output current parameter of the cutter is at the maximum current value 3A, the processor enables the DAC to scan the voltage value downwards and upwards under the output voltage parameter corresponding to the maximum current value, a binary search algorithm is used for determining whether the current is constant within a 50mA range in a current and voltage binary digit group acquired by the current acquisition module and the voltage acquisition module, and then the product of the average value of each current which maintains the constant of 50mA and the average value of the voltage corresponding to each current is called the optimal power value of an output interval.
Referring to fig. 8, in one embodiment, step S300 includes step S310 and step S320.
Step S310, obtaining different current sampling values and voltage sampling values of a high-frequency electric knife in a cutter simulation cutting tissue running state; step S320, selecting any two groups of current sampling values and corresponding voltage sampling values to perform least square fitting to obtain an optimal voltage curve.
In particular, the output electrical parameters include in particular current parameters and voltage parameters. In the technical scheme of the embodiment, the method is described by taking the acquisition of the optimal voltage curve according to the output electric parameters of the cutter during the simulation operation of the high-frequency electric cutter as an example. Referring to fig. 7 in combination, the rectangular area is the best voltage curve after the least square fitting. Firstly, when a host of the high-frequency electric knife works in vascular closure, the output frequency of the knife is controlled by dynamically adjusting the voltage in real time through the DAC function of the processor. In the process, the least square method is needed to be used for fitting an optimal voltage curve, and according to the formula y=kx+b of the least square method, k is a voltage slope, x represents an output current parameter, y represents an output voltage parameter, k value slope can be obtained through a two-point method, b is a constant, and the optimal value of 500 is obtained according to multiple experiments, so that a comparatively ideal curve can be fitted for following and adjusting the frequency.
Specifically, the slope formula is calculated by two points of a straight line: k= [ y2-y1]/[ x2-x1], where (x 1, y 1), (x 2, y 2) are two sets of current sample value-voltage sample value parameters taken through a plurality of sets of tests in an actual test, and are not particularly unique. In a more detailed embodiment, one parameter is that the analog knife cuts tissue into 18K resistors, and the processor performs ADC sampling through the current sampling module and the voltage sampling module to obtain a current (x 1) and a voltage value (y 1); the other is that the analog knife cuts the tissue into 105K resistor, the processor carries out ADC sampling through the current sampling module and the voltage sampling module, and the slope K can be calculated by taking the current (x 2) and the voltage value (y 2) into a slope formula.
When the frequency is regulated, the magnitude of the current cutter output current parameter can be acquired in real time through the processor after the fitted curve, and under the condition of constant output power, the working voltage (or the output voltage parameter) is regulated through the DAC output of the processor, so that the dynamic following under the condition of cutter frequency change is realized.
Referring to fig. 10, in an embodiment, before step S300, the method further includes step S100 and step S200.
Step S100, detecting whether a cutter of a high-frequency electric knife is in an access state; step S200, outputting an equipment abnormality alarm signal when the cutter is not in an access state; when the cutter is in the on state, step S300 is performed.
Specifically, referring to fig. 11 in combination, after the power of the main machine of the high-frequency electric knife (high-frequency bipolar electric knife) is turned on, the processor of the main machine starts the detection operation of whether the knife of the high-frequency electric knife is in the on state while the main machine is initialized. The subsequent operation can be executed only when the cutter is in the access state, and when the cutter is not in the access state, the host machine can output an equipment abnormality alarm signal to inform a user, so that the user can conveniently overhaul in time, and the working reliability of the high-frequency electric knife is effectively improved.
Correspondingly, in the technical scheme of the embodiment, the host of the high-frequency electric knife is also provided with an information prompt device, and the device can output an equipment abnormality alarm signal. It will be appreciated that the particular type of information-prompting device is not exclusive and may be, in one embodiment, an audible alarm, a display light alarm or a display screen, etc., with different choices being made specifically in connection with the actual needs. For example, referring to fig. 2 in combination, a display screen may be used as an information prompt device to output an equipment abnormality alarm signal.
It can be understood that the detection mode of whether the cutter of the high-frequency electric knife is in the connected state is not unique, in one embodiment, an identification IC chip is placed at the handle position of the cutter, and the processor of the host computer can realize the detection of whether the cutter is connected by reading the data of the IC chip.
Referring to fig. 12, after step S400, the method further includes step S810 and step S820.
Step S810, obtaining output voltage parameters of a cutter; and step S820, performing overvoltage and overcurrent protection on the high-frequency electric knife according to the output current parameter and the output voltage parameter.
Specifically, the technical scheme of the embodiment is that an overvoltage and overcurrent protection module is further arranged in the host, an output current parameter and an output voltage parameter of the cutter are obtained in real time in the running process of the high-frequency electric knife, the output voltage parameter and the output current parameter are respectively compared and analyzed with corresponding thresholds, when the output current parameter is larger than the set current threshold, the high-frequency electric knife is subjected to overcurrent protection, and when the output voltage parameter is larger than the set voltage threshold, the high-frequency electric knife is subjected to overvoltage protection, so that safe and stable running of the high-frequency electric knife is ensured. Further, in one embodiment, when the high-frequency electric knife generates overvoltage or overcurrent, the processor of the host computer outputs an alarm prompt message to inform the user.
In one embodiment, after step S500, the method further comprises: detecting whether the heating maintenance work is abnormal; when the heating and maintaining work is abnormal, outputting an abnormal work alarm signal. And/or after step S500, the method further comprises: it is detected whether the heating maintaining operation is completed.
Specifically, referring to fig. 11 in combination, after the processor of the host outputs a voltage and a current with a certain magnitude to the cutter, so that the cutter enters a working state, the processor also receives the output voltage parameter and the output current parameter collected by the voltage collecting module and the current collecting module in real time, if the output voltage parameter or the output current parameter is found to be abnormal, and characterizes that the heating and keeping work is abnormal at the moment, the processor outputs a working abnormality alarm signal to prompt a user, so that the user can know in time, and the vascular closure operation is finished. The output voltage parameter or the output current parameter is not abnormal, and the current working state is only required to be continuously maintained.
Meanwhile, in another embodiment, the resistance value of the front end of the cutter can be analyzed through the collected output voltage parameter and the collected output current parameter, and whether the single vascular closure operation is completed or not can be analyzed and judged. And when the resistance value of the front end of the cutter is detected to be smaller than a certain threshold value, the vascular closure is considered to be finished to finish a single operation. The vascular closure procedure required during actual use is not the only vascular closure procedure at this time, and after a single vascular closure procedure is completed, there may be two or more single vascular closure procedures required. Therefore, the processor returns to execute the operation of performing least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric knife to obtain an optimal voltage curve, and starts the operation of the next vascular closure operation. And when the next vascular closure operation is not required, the user can directly separate the cutter from the focus part.
According to the high-frequency electric knife operation control method, when the high-frequency electric knife is operated, the output electric parameters of the knife in the working state of the high-frequency electric knife can be subjected to least square fitting to obtain the optimal voltage curve, and then the output current parameters of the knife are obtained and matched with the optimal voltage curve for analysis, so that dynamic following and adjustment when the frequency of the knife changes are realized, and the knife is in a kept operation state. According to the scheme, the voltage curve is fitted by the least square method, so that quick and high-precision frequency tracking and adjustment are realized, the realization speed of heating and maintaining work can be effectively improved, and quick and complete vascular closure and hemostasis operation can be realized within 3-4 seconds.
Referring to fig. 13, a high frequency electric knife operation control device includes an optimal voltage curve fitting module 200, an output current parameter obtaining module 300, and a heating maintaining control module 400. The optimal voltage curve fitting module 200 is used for performing least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter to obtain an optimal voltage curve; the output current parameter obtaining module 300 is used for obtaining the output current parameter of the cutter; the heating and maintaining control module 400 is used for carrying out frequency following and adjustment on the cutter according to the output current parameter and the optimal voltage curve so as to control the cutter to carry out heating and maintaining work.
In one embodiment, referring to fig. 14, after the output current parameter obtaining module 300, the apparatus further includes a step adjustment module 500. The hierarchical adjustment module 500 is configured to search the output current parameter by using a dichotomy to determine an optimal power output range segment; controlling the cutter to enter different grades of drying and solidifying states according to the optimal power output range section.
In one embodiment, the hierarchical adjustment module 500 is further configured to search and locate the output current parameter by using a dichotomy to obtain a maximum current value; and obtaining an output voltage parameter corresponding to the maximum current value, and obtaining an optimal power output range section according to the maximum current value and the output voltage parameter. The optimal power output range section is adjusted to maintain different times so that the cutter enters different grades of drying and solidification working states.
In one embodiment, the best voltage curve fitting module 200 is further configured to obtain different current sampling values and voltage sampling values of the high-frequency electric knife in a state that the knife simulates cutting tissue; and selecting any two groups of current sampling values and corresponding voltage sampling values to perform least square fitting to obtain an optimal voltage curve.
In one embodiment, referring to fig. 15, prior to the optimal voltage curve fitting module 200, the apparatus further comprises an access detection module 100. The access detection module 100 is used for detecting whether a cutter of the high-frequency electric knife is in an access state; when the cutter is not in an access state, outputting an equipment abnormality alarm signal; when the cutter is in the connected state, the optimal voltage curve fitting module 200 is controlled to perform least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter, so as to obtain an optimal voltage curve.
In one embodiment, referring to fig. 16, after the output current parameter obtaining module 300, the apparatus further includes an overvoltage and overcurrent protection module 600. The overvoltage and overcurrent protection module 600 is used for acquiring output voltage parameters of the cutter; and carrying out overvoltage and overcurrent protection on the high-frequency electric knife according to the output current parameter and the output voltage parameter.
In one embodiment, referring to fig. 17, after outputting the current parameter obtaining module 300, the apparatus further includes an abnormality detecting module 700 and/or a work detecting module 800. The abnormality detection module 700 is configured to detect whether a work abnormality occurs in the heating maintenance work; when the heating and maintaining work is abnormal, outputting an abnormal work alarm signal. The operation detection module 800 is used to detect whether the heating maintaining operation is completed.
The specific limitation regarding the high-frequency electric knife operation control device may be referred to the limitation of the high-frequency electric knife operation control method hereinabove, and will not be described in detail herein. The above-described respective modules in the high-frequency electric knife operation control device may be realized in whole or in part by software, hardware, and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
According to the high-frequency electric knife operation control device, when the high-frequency electric knife is operated, the output electric parameters of the knife in the working state of the high-frequency electric knife can be subjected to least square fitting to obtain the optimal voltage curve, and then the output current parameters of the knife are obtained and matched with the optimal voltage curve for analysis, so that dynamic following and adjustment when the frequency of the knife changes are realized, and the knife is in a kept operation state. According to the scheme, the voltage curve is fitted by the least square method, so that quick and high-precision frequency tracking and adjustment are realized, the realization speed of heating and maintaining work can be effectively improved, and quick and complete vascular closure and hemostasis operation can be realized within 3-4 seconds.
Referring to fig. 2 in combination, a high-frequency electric knife system includes a knife 10 and a main machine 20, wherein the knife 10 is connected to the main machine 20 through a shielding cable, and the main machine 20 is used for controlling the operation of the knife 10 according to the high-frequency electric knife operation control method.
In particular, the high-frequency electric knife may be classified into a high-frequency monopolar electric knife and a high-frequency bipolar electric knife according to the operation mode, and for convenience of understanding of the various embodiments of the present application, the high-frequency electric knife mentioned below may be understood as a high-frequency bipolar electric knife. The high-frequency electric knife comprises a knife 10 and a main machine 20, wherein the main machine 20 is connected with the knife 10 through a high-material shielding cable. Wherein, the cutter 10 is partially used for contacting with a patient to realize operations such as focus cutting and vascular closure, and the host 20 is used for carrying out different power outputs to the cutter 10 so as to control the cutter 10 to realize operations such as vascular closure.
The method for controlling the operation of the high-frequency electric knife provided by the application is realized in the host 20 of the high-frequency electric knife, and it should be noted that the specific structure of the host 20 is not unique. In one embodiment, referring to fig. 3 in combination, the host 20 includes a processor (specifically, a micro control unit, etc.), a voltage sampling module, a current sampling module, a frequency adjusting module, and a power output module, where the voltage sampling module, the current sampling module, the frequency adjusting module, and the power output module are respectively connected to the processor, and the voltage sampling module, the current sampling module, and the power output module are all connected to the tool 10. The voltage sampling module and the current sampling module are used for collecting output voltage parameters and output current parameters of the cutter 10, sending the output voltage parameters and the output current parameters to the processor for analysis, analyzing the output voltage parameters and the output current parameters fed back in real time by the frequency adjusting module, realizing frequency tracking and dynamic adjustment, and generating high-frequency 500KHZ energy signals by the power output module comprising photoelectric isolation and transformer output.
The cutter 10 includes a cutter head, a pinching handle, and a start switch, wherein the cutter head has a bipolar wiring structure, the pinching handle includes a blade cutting handle and a pinching locking handle, the blade cutting handle is mainly used for separating tissue after single closing, the pinching handle is used for pinching and pinching the target tissue and organ in the body, and the start switch is used for starting single vascular closing operation.
It should be noted that the acquisition of the output electrical parameter of the tool 10 in the operating state of the high frequency electric knife may be, in one embodiment, realized by acquiring the output electrical parameter of the tool 10 while actually controlling the operation of the high frequency electric knife. In another embodiment, the output electric parameters in the simulated operation state can be acquired by simulating the operation state of the high-frequency electric knife. After obtaining the output electrical parameter, the host 20 of the high-frequency electric knife performs least square fitting on the output electrical parameter, and finally obtains an optimal voltage curve representing the corresponding relation between the output current parameter and the output voltage parameter.
After obtaining the optimal voltage curve, the host 20 will perform the output current parameter collecting operation in the running process of the tool 10 in real time through the current sampling module in the host 20 in the actual running process of the high-frequency electric tool, and send the collected output current parameter to the processor in the host 20, so as to perform subsequent running control.
The heating and keeping work, namely the cutter head continuously heats, burns the focus part after cutting to stop bleeding and coagulate, namely the vascular closure operation. After obtaining the output current parameter, the processor of the host 20 performs matching analysis on the output current parameter and an optimal voltage curve, and adjusts the working voltage of the cutter 10 of the high-frequency electric knife by adjusting the output of the DAC signal under the condition of constant output power, thereby realizing dynamic following under the condition of frequency change of the cutter 10. According to the technical scheme, the rapid frequency tracking and adjustment are realized by adopting a least square method, so that the method has the advantages of higher vascular closure speed, good effect and stable working voltage and current compared with the traditional product in the market.
According to the high-frequency electric knife system, when the high-frequency electric knife operates, the output electric parameters of the knife 10 in the working state of the high-frequency electric knife can be subjected to least square fitting to obtain an optimal voltage curve, and then the output current parameters of the knife 10 are obtained and matched with the optimal voltage curve for analysis, so that dynamic following and adjustment when the frequency of the knife 10 changes are realized, and the knife 10 is in a state of keeping operation. According to the scheme, the voltage curve is fitted by the least square method, so that quick and high-precision frequency tracking and adjustment are realized, the realization speed of heating and maintaining work can be effectively improved, and quick and complete vascular closure and hemostasis operation can be realized within 3-4 seconds.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A high frequency electric knife operation control device, characterized by comprising:
the optimal voltage curve fitting module is used for carrying out least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter to obtain an optimal voltage curve; the optimal voltage curve represents the corresponding relation between the output current parameter and the output voltage parameter of the cutter under the condition that the output power of the main machine of the high-frequency electric cutter is constant;
the output current parameter acquisition module is used for acquiring the output current parameters of the cutter;
The heating and maintaining control module is used for carrying out frequency following and adjustment on the cutter according to the output current parameter and the optimal voltage curve so as to control the cutter to carry out heating and maintaining work;
The method for performing least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter to obtain an optimal voltage curve comprises the following steps: obtaining different current sampling values and voltage sampling values of a high-frequency electric knife in a cutter simulation cutting tissue running state; selecting any two groups of current sampling values and corresponding voltage sampling values to calculate to obtain a k value in an optimal voltage curve y=kx+b; k represents a voltage slope, x represents an output current parameter, y represents an output voltage parameter, and b is obtained by multiple experiments to obtain 500;
The frequency following and adjusting are carried out on the cutter according to the output current parameter and the optimal voltage curve so as to control the cutter to carry out heating and maintaining work, and the method comprises the following steps: searching and positioning the output current parameter by adopting a dichotomy method to obtain a maximum current value; and obtaining an output voltage parameter corresponding to the maximum current value according to the optimal voltage curve matching, obtaining an optimal power output range section according to the maximum current value and the corresponding output voltage parameter, and performing fine adjustment on DAC output current according to the optimal power output range section so as to maintain the duration of the optimal power output range section.
2. The high-frequency electric knife operation control device according to claim 1, wherein after the output current parameter acquisition module, the device further comprises a step adjustment module for: searching the output current parameters by adopting a dichotomy method, and determining an optimal power output range section; controlling the cutter to enter different grades of drying and solidifying states according to the optimal power output range section.
3. The apparatus according to claim 1, wherein before the optimum voltage curve fitting module, the apparatus further comprises an access detection module for: detecting whether a cutter of the high-frequency electric knife is in an access state or not; outputting an equipment abnormality alarm signal when the cutter is not in an access state; when the cutter is in the access state, the optimal voltage curve fitting module is controlled to execute the operation of performing least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter to obtain an optimal voltage curve.
4. The high-frequency electric knife operation control device according to claim 1, wherein after the output current parameter obtaining module, the device further comprises an overvoltage and overcurrent protection module, and the overvoltage and overcurrent protection module is used for: acquiring output voltage parameters of the cutter; and carrying out overvoltage and overcurrent protection on the high-frequency electrotome according to the output current parameter and the output voltage parameter.
5. The high-frequency electric knife operation control device according to claim 1, wherein after the heating maintenance control module, the device further comprises an abnormality detection module and/or a work detection module, the abnormality detection module is used for detecting whether the heating maintenance work is abnormal in work, and outputting a work abnormality alarm signal when the heating maintenance work is abnormal in work; the work detection module is used for detecting whether the heating maintenance work is completed or not.
6. A high frequency electrotome system comprising a tool and a host, the tool being connected to the host by a shielded cable, the host being adapted to: performing least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter to obtain an optimal voltage curve; obtaining an output current parameter of the cutter; according to the output current parameter and the optimal voltage curve, carrying out frequency following and adjustment on the cutter so as to control the cutter to carry out heating and maintaining work;
the optimal voltage curve represents the corresponding relation between the output current parameter and the output voltage parameter of the cutter under the condition that the output power of the host is constant; performing least square fitting according to output electric parameters of the cutter in a working state of the high-frequency electric cutter to obtain an optimal voltage curve, wherein the method comprises the following steps: obtaining different current sampling values and voltage sampling values of a high-frequency electric knife in a cutter simulation cutting tissue running state; selecting any two groups of current sampling values and corresponding voltage sampling values to calculate to obtain a k value in an optimal voltage curve y=kx+b; k represents a voltage slope, x represents an output current parameter, y represents an output voltage parameter, and b is obtained by multiple experiments to obtain 500;
the frequency following and adjusting are carried out on the cutter according to the output current parameter and the optimal voltage curve so as to control the cutter to carry out heating and maintaining work, and the method comprises the following steps: searching and positioning the output current parameter by adopting a dichotomy method to obtain a maximum current value; and obtaining an output voltage parameter corresponding to the maximum current value according to the optimal voltage curve matching, obtaining an optimal power output range section according to the maximum current value and the output voltage parameter, and fine-tuning DAC output current according to the optimal power output range section so as to maintain the duration of the optimal power output range section.
7. The high frequency electric knife system of claim 6, wherein after the obtaining the output current parameter of the knife, the host computer is further configured to: searching the output current parameters by adopting a dichotomy method, and determining an optimal power output range section; controlling the cutter to enter different grades of drying and solidifying states according to the optimal power output range section.
8. The high-frequency electric knife system according to claim 6, wherein before the fitting by least square method is performed according to the output electric parameters of the knife in the working state of the high-frequency electric knife to obtain the optimal voltage curve, the host computer is further configured to: detecting whether a cutter of the high-frequency electric knife is in an access state or not; outputting an equipment abnormality alarm signal when the cutter is not in an access state; when the cutter is in the access state, the optimal voltage curve fitting module is controlled to execute the operation of performing least square fitting according to the output electric parameters of the cutter in the working state of the high-frequency electric cutter to obtain an optimal voltage curve.
9. The high frequency electric knife system of claim 6, wherein after the obtaining the output current parameter of the knife, the host computer is further configured to: acquiring output voltage parameters of the cutter; and carrying out overvoltage and overcurrent protection on the high-frequency electrotome according to the output current parameter and the output voltage parameter.
10. The high frequency electric knife system of claim 6, wherein the host computer is further configured to, after frequency following and adjusting the knife according to the output current parameter and the optimal voltage profile to control the knife to perform a heat retention operation: detecting whether the heating maintaining work is abnormal; and outputting a working abnormality alarm signal when the heating maintenance work is abnormal.
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| WO2018158913A1 (en) * | 2017-03-02 | 2018-09-07 | オリンパス株式会社 | Power source device, high-frequency processing system, and operation method for power source device |
| CN107317484B (en) * | 2017-08-20 | 2023-12-12 | 昆山雷盛医疗科技有限公司 | Universal active surgical instrument power generator and control method thereof |
| CN113811255B (en) * | 2019-05-09 | 2024-07-05 | 捷锐士阿希迈公司(以奥林巴斯美国外科技术名义) | Electrosurgical systems and methods |
| CA3163998A1 (en) * | 2019-12-31 | 2021-07-08 | Applied Medical Resources Corporation | Electrosurgical system with tissue and maximum current identification |
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| CN103417292A (en) * | 2013-06-06 | 2013-12-04 | 上海理工大学 | Electrosurgery simulation system |
| CN105769333A (en) * | 2016-05-08 | 2016-07-20 | 深圳市邦沃科技有限公司 | Novel high-frequency electrotomy therapeutic apparatus |
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