CN115670591A

CN115670591A - Energy output control method, device, equipment and medium of ultrasonic knife system

Info

Publication number: CN115670591A
Application number: CN202310001285.XA
Authority: CN
Inventors: 翁俊; 潘家勇
Original assignee: SHANGHAI YISI MEDICAL TECHNOLOGY CO LTD
Current assignee: SHANGHAI YISI MEDICAL TECHNOLOGY CO LTD
Priority date: 2023-01-03
Filing date: 2023-01-03
Publication date: 2023-02-03
Anticipated expiration: 2043-01-03
Also published as: CN115670591B

Abstract

The application relates to a method, a device, a computer device and a storage medium for controlling energy output of an ultrasonic scalpel system, wherein the method comprises the following steps: acquiring the variable quantity of the output power of a host of the ultrasonic scalpel system at the current moment; acquiring the frequency variation of the ultrasonic knife head of the ultrasonic knife system at the current moment; acquiring the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment; and controlling the energy output of the host at the current moment according to the ratio of the current moment. The method can control the energy output of the main machine based on the ratio of the output power variation of the main machine to the frequency variation of the ultrasonic cutter head at each moment, breaks through the energy output mode that the main machine outputs constant current in the traditional mode, adjusts the energy output of the main machine in a targeted manner, and can take cutting and coagulation effects into account when in use.

Description

Energy output control method, device, equipment and medium of ultrasonic knife system

Technical Field

The present application relates to the field of surgical medical device technology, and in particular, to a method and apparatus for controlling energy output of an ultrasonic scalpel system, a computer device, and a storage medium.

Background

The ultrasonic knife system mainly comprises an energy generator (a main machine), a handle with an ultrasonic transducer, an instrument (an ultrasonic knife head) with an end effector and capable of cutting and sealing tissues, a foot switch and the like. When the ultrasonic scalpel system is in an excitation state, the energy generator outputs fixed excitation current according to an output energy gear selected by a user to drive the ultrasonic transducer, the ultrasonic transducer converts electric energy into mechanical energy to drive the ultrasonic scalpel head to vibrate and rub the clamped tissue in a high-frequency mechanical mode, and finally the cutting, hemostasis or coagulation function of the soft tissue is achieved. Compared with the traditional electrosurgery system, the ultrasonic scalpel system has the advantages of low tissue thermal injury, no direct electrical connection, no risk of electric leakage and the like, thereby being widely used in the surgery.

The existing ultrasonic knife system has poor clinical adaptability because the excitation current output by the energy generator is constant when being excited. Namely: relevant theories and experimental researches show that the larger the excitation current provided by the host computer is, the faster the cutting speed of the ultrasonic cutter head is, and the worse the blood coagulation and stopping effects are; conversely, the smaller the excitation current provided by the main machine, the slower the cutting speed of the ultrasonic knife head and the better the blood coagulation and stopping effect. Therefore, the host adopting fixed current output is difficult to give consideration to both cutting and blood coagulation effects, and the clinical adaptability is poor.

Disclosure of Invention

Accordingly, it is necessary to provide a method and an apparatus for controlling energy output of an ultrasonic blade system, a computer device, and a storage medium, which can control the energy output of a main machine based on a ratio of a variation of output power of the main machine to a variation of frequency of an ultrasonic blade at each time, break through a conventional energy output method in which the main machine outputs a constant current, adjust the energy output of the main machine in a targeted manner, and achieve both cutting and coagulation effects when in use.

A method of controlling energy output of an ultrasonic blade system, comprising: acquiring the variable quantity of the output power of a host of the ultrasonic scalpel system at the current moment; acquiring the frequency variation of the ultrasonic knife head of the ultrasonic knife system at the current moment; acquiring the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment; and controlling the energy output of the host at the current moment according to the ratio of the current moment.

In one embodiment, controlling the energy output of the host at the current moment according to the ratio of the current moment comprises: if the speed of the ratio reduction at the current moment is identified to meet the set requirement, acquiring a preset current value; and controlling the output energy of the host at the current moment according to the preset current value.

In one embodiment, identifying that the rate at which the ratio at the current time decreases satisfies the set requirement includes: acquiring the ratio of the output power variation of the host machine to the frequency variation of the ultrasonic cutter head at multiple historical moments; calculating the variance of the ratio of the variation of the output power of the hosts at a plurality of moments in the front sequence to the variation of the frequency of the ultrasonic scalpel head, and calculating the variance of the ratio of the variation of the output power of the hosts at a plurality of moments in the back sequence to the variation of the frequency of the ultrasonic scalpel head; calculating the fluctuation amount of the ratio of the current moment according to the variance in the front sorting and the variance in the back sorting; and determining that the rate of the ratio reduction at the current moment meets the set requirement according to the fluctuation amount.

In one embodiment, the preset current value is linearly related to the current value of the excitation current of the initial excitation state of the host machine.

In one embodiment, the predetermined current value is

； wherein ,

is a preset current value, and is used as a current value,

a is a constant greater than 0 and less than 1, which is a current value of an excitation current in an initial excitation state of the host.

In one embodiment, after the step of controlling the output energy of the host at the current moment according to the preset current value, the method further includes: and controlling to change the output prompt tone so as to remind.

In one embodiment, the amount of change in the output power at the current time is determined based on an accumulated amount of the output power for a time period between the current time and a historical preset time of the host; and/or the frequency variation at the current moment is determined based on the difference between the working frequency of the host at the current moment and the working frequency of the host at the historical preset moment.

In one embodiment, obtaining a ratio of a variation of the output power at the current time to a variation of the frequency at the current time includes: determining the temperature variation of the ultrasonic cutter head at the current moment according to the frequency variation at the current moment; and determining the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment according to the ratio of the variable quantity of the output power at the current moment to the variable quantity of the temperature.

In one embodiment, determining the temperature variation of the ultrasonic blade at the current time according to the frequency variation at the current time includes: according to

Determining the temperature of the ultrasonic cutter head at each moment, and determining the temperature variation of the ultrasonic cutter head at the current moment according to the temperature of the ultrasonic cutter head at each moment; wherein,

which is indicative of the temperature at any one time,

to represent

The frequency of the ultrasonic cutter head at the corresponding moment,

and

respectively, represent constants.

In one embodiment, determining the ratio of the change amount of the output power at the current time to the change amount of the frequency at the current time according to the ratio of the change amount of the output power at the current time to the change amount of the temperature includes: according to

Determining output power at the present timeThe ratio of the variation of (a) to the variation of the frequency at the current time; wherein,

indicating a ratio of a variation amount of the output power at the present time to a variation amount of the frequency at the present time,

the amount of change in the temperature is indicated,

indicating the amount of change in output power at the present time,

which is indicative of the output power of the host,

indicating the efficiency of converting electrical energy of the host machine into mechanical energy,

which is indicative of the correction factor(s),

which indicates the current time of day,

indicating the previous time instant.

An energy output control device of an ultrasonic blade system, comprising: the first acquisition module is used for acquiring the variable quantity of the output power of the host at the current moment of the ultrasonic scalpel system; the second acquisition module is used for acquiring the frequency variation of the ultrasonic knife head of the ultrasonic knife system at the current moment; the third acquisition module is used for acquiring the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment; and the control module is used for controlling the energy output of the host at the current moment according to the ratio of the current moment.

A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of any of the above embodiments when executing the computer program.

A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of the embodiments described above.

According to the energy output control method and device of the ultrasonic scalpel system, the computer device and the storage medium, the variation of the output power of the host at the current moment of the ultrasonic scalpel system is obtained, the frequency variation of the ultrasonic scalpel head at the current moment of the ultrasonic scalpel system is obtained, the ratio of the variation of the output power at the current moment to the frequency variation at the current moment is obtained, and the energy output of the host at the current moment is controlled according to the ratio at the current moment. Therefore, the energy output of the main machine can be controlled based on the ratio of the output power variation of the main machine at each moment to the frequency variation of the ultrasonic scalpel head, the energy output mode that the main machine outputs constant current in the traditional mode is broken through, the energy output of the main machine is adjusted in a targeted mode, and both cutting and coagulation effects can be achieved when the ultrasonic scalpel is used. Particularly, when the cutting state of the tissue is in the third stage state and the fourth stage state, the ratio of the variation of the output power of the main machine to the variation of the frequency of the ultrasonic cutter head is changed greatly, and the energy output of the main machine is adjusted in a targeted manner based on the ratio, so that the cutting and coagulation effects of the tissue can be improved.

Drawings

FIG. 1 is a schematic diagram of an ultrasonic blade system in one embodiment;

FIG. 2 is a block diagram showing functional blocks of various circuits within the host computer in one embodiment;

FIG. 3 is a schematic flow chart diagram of a method for controlling the energy output of an ultrasonic blade system in one embodiment;

FIG. 4 is a graph illustrating the correlation between temperature values of an ultrasonic blade and the operating frequency of the ultrasonic blade in one embodiment;

FIG. 5 is a graph illustrating a variation in the thermal efficiency values for various stages of a tissue cutting process of the ultrasonic blade system in one embodiment;

FIG. 6 is a schematic diagram of an internal control circuit for the output power of the host in one embodiment;

FIG. 7 is a block diagram of an energy output control of the ultrasonic blade system in one embodiment;

fig. 8 is an internal structural diagram of an energy master in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The application provides an energy output control method of an ultrasonic scalpel system, which is applied to the ultrasonic scalpel system. As shown in fig. 1, the ultrasonic blade system includes a foot switch 30, an ultrasonic surgical instrument 20, and a main machine 10. Wherein the host computer 10 executes an energy output control method of an ultrasonic blade system of the present application.

In one embodiment, the various circuit functional blocks within host 10 are shown in FIG. 2. The host 10 is composed of an alternating current input module (AC Line) 100, an alternating current to direct current power supply module (AC/DC) 101, a fixed direct current voltage conversion module (DC/DC) 102 (which may be a buck or full bridge converter), a power Amplifier Module (AMP) 103, a transformer 104, an output voltage and current sampling module 105, an ultrasonic transducer 106, and a control system 121. The control system 121 is formed by combining a human-computer interaction module (UI) 110, an auxiliary power supply 107, a control module 111 (which may be a microcontroller such as a DSP or an AMR or an MCU shown in fig. 2), a driving module 112 (which may be an FPGA or other logic device such as a CPLD shown in fig. 2), a low-speed DAC module (LS-DAC) 108, a high-speed DAC module (HS-DAC) 109, an ADC module 113, an isolation transmission module for voltage sampling 115, and an isolation transmission module for current sampling 114.

The AC/DC 101 output provides the DC voltage for system operation while the auxiliary power for system operation is generated by the auxiliary power supply 107. The output voltage value of the DC/DC 102 is obtained by the control module 111 through closed-loop control of the voltage feedback value of the AMP 103. The UI 110 is configured to receive a user screen operation instruction and display a corresponding interface, and the UI 110 performs data interaction with the control module 111 in a serial communication manner and responds to a user operation according to the instruction of the control module 111. The drive module 112 controls the LS-DAC 108 to generate a voltage value that is the magnitude of the output current amplitude and controls the AMP 103 to operate on the bias voltage, and the HS-DAC 109 generates a sinusoidal drive signal at a specified frequency (e.g., 55 kHz). The AMP 103 amplifies the output voltage and outputs the amplified output voltage to the transformer 104 to realize voltage change and electrical isolation, the output voltage and current of the host 10 respectively pass through the voltage sampling isolation transmission module 115 and the current sampling isolation transmission module 114 to realize signal transmission on the patient side, and the two isolation transmission modules may be transformers or isolation operational amplifier chips. The voltage analog signal and the current analog signal output after the isolation are converted into digital signals by the high-speed ADC module 113 and sent to the driving module 112, so as to complete the digital sampling of the ADC module 113.

The energy output control method of the ultrasonic blade system provided by the present application is applied to the above-mentioned host 10, and may be specifically applied to the driving module 112 of the host 10. In one embodiment, as shown in FIG. 3, a method of controlling the energy output of an ultrasonic blade system includes the steps of:

s302, obtaining the variable quantity of the output power of the main machine of the ultrasonic knife system at the current moment.

In this embodiment, when the ultrasonic scalpel system is in the excitation state, the host computer outputs the excitation current according to the output energy gear selected by the user to drive the ultrasonic transducer, and the ultrasonic transducer converts the electric energy into the mechanical energy to drive the ultrasonic scalpel head to work. When the host outputs current, the driving module in the host can acquire the output power of the host at each moment.

The variation of the output power of the host at the current moment is determined by the output power of the host at the current moment and the output power of the host at the historical moment. In one example, the amount of change in the output power of the host at the current time is determined based on an accumulated amount of output power for a period of time between the current time of the host and a historical preset time.

Specifically, the driving module inside the host includes an integrated chip, and the historical preset time can be determined by configuring a time difference between the historical preset time and the current time in the integrated chip. If the difference between the historical preset time and the current time is 1ms, the historical preset time can be determined according to the time difference of 1ms when the current time is determined.

For example, the amount of change in the output power of the host at the present time can be calculated by the following equation:

；

wherein ,

indicating the amount of change in the output power of the host at the current time,

which indicates the current time of day,

indicating the historical preset time of day,

representing the output power of the host.

Therefore, the amount of change in the output power of the host at the current time is determined by integrating the output power at the current time and the historical preset time.

When in use

And

is short enough to be approximately considered within this time period

The value is not changed, order

And then.

S304, acquiring the frequency variation of the ultrasonic knife head of the ultrasonic knife system at the current moment.

In this embodiment, in an actual application scenario, the host of the ultrasonic scalpel system can acquire the working frequency of the ultrasonic scalpel head at each time in real time, and the frequency variation of the ultrasonic scalpel head at each time can be determined based on the working frequency at each time.

In one example, the frequency variation amount at the current time is determined based on a difference between an operating frequency of the host at the current time and an operating frequency of the host at a historical preset time.

As described above, the driving module in the host includes the integrated chip, and the historical preset time can be determined by configuring the time difference between the historical preset time and the current time in the integrated chip. And (4) making a difference value between the working frequencies corresponding to the two moments to obtain the frequency variation of the ultrasonic cutter head at the current moment.

S306, acquiring the ratio of the output power variation at the current moment to the frequency variation at the current moment.

In this embodiment, a ratio of the variation of the output power of the host at the current time to the variation of the frequency of the ultrasonic scalpel head at the current time is calculated. For example,

represents the frequency variation of the ultrasonic cutter head at the current moment, and the ratio of the frequency variation to the frequency variation of the ultrasonic cutter head is

。

And S308, controlling the energy output of the host at the current moment according to the ratio of the current moment.

In this embodiment, the energy output of the host at the current time is controlled according to the ratio of the variation of the output power of the host at the current time to the variation of the frequency of the ultrasonic blade at the current time. The current value of the excitation current of the host at the current moment can be determined based on the ratio at the current moment so as to control the excitation current of the host at the current moment, and therefore, the energy output of the host at the current moment is controlled.

It should be noted that: the energy output of the host is controlled by the variable quantity of the single parameter, and the variable quantity of the single parameter belongs to a dynamic process and is poor in stability, so that the energy output of the host at the current moment is not easy to control based on the variable quantity of the single parameter in practical application. For example, the energy output of the main machine is controlled based on the variation of the output power of the main machine, or the energy output of the main machine is controlled based on the frequency variation of the ultrasonic cutter head, because the variation of the output power of the main machine and the frequency variation of the ultrasonic cutter head both belong to dynamic processes, the stability is poor, and it is not easy to control the energy output of the main machine at the current moment based on any single parameter of the two parameters.

In this embodiment, the ratio processing is performed on the variation of the output power of the host and the variation of the frequency of the ultrasonic cutter head, so that instability caused by the dynamics of the two is counteracted, the obtained ratio is more stable, the energy output of the host at the current moment is controlled according to the ratio, and the control of the energy output of the host can be more stably realized.

According to the energy output control method of the ultrasonic scalpel system, the variable quantity of the output power of the host at the current moment of the ultrasonic scalpel system is obtained, the frequency variable quantity of the ultrasonic scalpel head at the current moment of the ultrasonic scalpel system is obtained, the ratio of the variable quantity of the output power at the current moment to the frequency variable quantity at the current moment is obtained, and the energy output of the host at the current moment is controlled according to the ratio at the current moment. Therefore, the energy output of the main machine can be controlled based on the ratio of the output power variation of the main machine at each moment to the frequency variation of the ultrasonic scalpel head, the energy output mode that the main machine outputs constant current in the traditional mode is broken through, the energy output of the main machine is adjusted in a targeted mode, and both cutting and coagulation effects can be achieved when the ultrasonic scalpel is used. Particularly, when the cutting state of the tissue is in the third stage state and the fourth stage state, the ratio of the variation of the output power of the main machine to the variation of the frequency of the ultrasonic cutter head is changed greatly, and the energy output of the main machine is adjusted in a targeted manner based on the ratio, so that the cutting and coagulation effects of the tissue can be improved.

In an embodiment, the obtaining a ratio of a variation of the output power at the current time to a variation of the frequency at the current time includes: determining the temperature variation of the ultrasonic cutter head at the current moment according to the frequency variation at the current moment; and determining the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment according to the ratio of the variable quantity of the output power at the current moment to the variable quantity of the temperature.

In one example, the determining the temperature variation of the ultrasonic blade at the current time according to the frequency variation at the current time includes: according to

which is indicative of the temperature at any one time,

to represent

The frequency of the ultrasonic cutter head at the corresponding moment,

and

respectively, represent constants.

In this embodiment, the temperature value of the ultrasonic blade is estimated by curve fitting. The correlation curve of the temperature value of the ultrasonic tool bit and the working frequency of the ultrasonic tool bit obtained by data fitting is shown in fig. 4. As can be seen from fig. 4, the temperature value and the operating frequency of the ultrasonic tool bit in the range of 300 ℃ approximately exhibit a linear relationship, and can be fitted according to the following formula:

wherein ,

which is indicative of the temperature at any one time,

to represent

The frequency of the ultrasonic cutter head at the corresponding moment,

and

respectively, represent constants.

Therefore, the relation between the operating frequency and the temperature value can be determined by curve fitting, and the relation can be the linear relation.

When the working frequency of the ultrasonic cutter head is determined, the corresponding temperature value can be obtained through the relation between the working frequency and the temperature value. Furthermore, based on the relational expression between the temperature value and the operating frequency, the temperature change amount of the ultrasonic blade can be determined from the frequency change amount of the ultrasonic blade. I.e. the amount of temperature change

. Further, the relationship between the two can be deduced

=

。

represents the frequency variation of the ultrasonic blade at the current moment,

indicating the amount of temperature change.

In an embodiment, the determining the ratio of the change amount of the output power at the current time to the change amount of the frequency at the current time according to the ratio of the change amount of the output power at the current time to the change amount of the temperature includes: according to

Determining the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment;

wherein ,

the amount of change in the temperature is indicated,

indicating the amount of change in output power at the present time,

which is indicative of the output power of the host,

which is indicative of the correction factor(s),

which indicates the current time of day,

representing a historical preset time.

Specifically, the thermal efficiency may be set to a value. The calculation formula of the thermal efficiency value is:

；

when in use

And

when the interval of (1) is sufficiently short, let ts =

-

The above formula can be simplified as follows:

；

in the above-mentioned formula,

the larger the value of (A), the lower the thermal efficiency of the ultrasonic blade head, and vice versa

The smaller the value of (a) the higher the thermal efficiency of the ultrasonic blade tip.

In one embodiment, controlling the energy output of the host at the current time according to the ratio of the current time comprises: if the specific value reduction rate at the current moment is identified to meet the set requirement, acquiring a preset current value; and controlling the output energy of the host at the current moment according to the preset current value.

In this embodiment, the one-time tissue cutting process of the ultrasonic scalpel system can be divided into five stages, wherein the fourth stage is a critical turning stage of the energy output adjustment of the main machine, at this time, the tissue is about to be cut or has been cut, partial contact or complete contact friction is generated between the scalpel head and the tissue pad, since the thermal conductivity of the tissue pad is 0.25 far less than the thermal conductivity of the tissue 0.577, the temperature of the ultrasonic scalpel head can be rapidly increased, and the thermal efficiency is significantly increased,

the value decreases rapidly. Thus, by identification

And accurately identifying the fourth stage state in a/t curve inflection point mode, so as to control the output energy of the host in the fourth stage state according to a preset current value.

Specifically, a setting request is previously configured, and the setting request is recognized

And the value is rapidly reduced, and whether the cutting process enters a fourth stage state is judged. In one example, the set requirement may be a set rate value if the current time is identified

If the rate of decrease is greater than the set rate value, the current tissue state can be determined to be the fourth stage state.

And when the rate of the reduction of the ratio at the current moment is identified to meet the set requirement, determining that the organization state at the current moment is the fourth stage state, acquiring a preset current value of the fourth stage state, and controlling the output energy of the host at the current moment according to the preset current value of the fourth stage state. The preset current value of the fourth stage state is in a linear relation with the current value of the excitation current of the initial excitation state of the host machine.

In one example, the preset current value is

； wherein ,

is a preset current value, and is used as a current value,

a is a constant greater than 0 and less than 1, which is a current value of an excitation current in an initial excitation state of the host. Such as a =0.5.

In one example, the above identifying that the rate at which the ratio at the current time decreases satisfies the set requirement includes: acquiring the ratio of the output power variation of the host machine to the frequency variation of the ultrasonic cutter head at multiple historical moments; calculating the variance of the ratio of the variation of the output power of the hosts at a plurality of moments in the front sequence to the variation of the frequency of the ultrasonic scalpel head, and calculating the variance of the ratio of the variation of the output power of the hosts at a plurality of moments in the back sequence to the variation of the frequency of the ultrasonic scalpel head; calculating the fluctuation amount of the ratio of the current moment according to the variance in the front sorting and the variance in the back sorting; and determining that the rate of the ratio reduction at the current moment meets the set requirement according to the fluctuation amount.

In this embodiment, based on the above

Set to the value of thermal efficiency. The calculation formula of the thermal efficiency value is:

；

therefore, the ratio of the variation of the output power of the main machine to the variation of the frequency of the ultrasonic cutter head at a plurality of historical moments can be determined by the value of the thermal efficiency at the plurality of historical moments. The variance corresponding to the calculated ratio may also be determined by calculating the variance of the value of the thermal efficiency. Further, the fluctuation amount for calculating the ratio may also be determined by calculating the fluctuation amount of the value of the thermal efficiency.

Specifically, the host computer records the value of thermal efficiency at each time in real time as the ultrasonic blade system performs the tissue cutting process. When the rate of thermal efficiency reduction at the current moment needs to be calculated, values of thermal efficiency at a plurality of moments before the current moment are obtained. And recording the heat efficiency values of a plurality of moments before the current moment according to the time sequence. Calculating a variance of the values of the thermal efficiency at a plurality of time instants that are chronologically forward, and calculating a variance of the values of the thermal efficiency at a plurality of time instants that are chronologically backward. The fluctuation amounts of the two variances are calculated, and the fluctuation amounts are used as the fluctuation amounts of the values of the thermal efficiency at the current time. And determining that the reduction rate of the thermal efficiency at the current moment meets the set requirement according to the fluctuation amount of the value of the thermal efficiency at the current moment. The plurality of time instants in the front of the sequence and the plurality of time instants in the back of the sequence may be: after the values of the thermal efficiency at a plurality of moments before the current moment are sequenced according to the time sequence, a plurality of moments in front of the sequence and a plurality of moments behind the sequence are selected. For example, the number of time instants sorted in the front may be chosen to be the same as the number of time instants sorted in the back. For example, the first-ranked moments include t11, t12, and t13, and the second-ranked moments include t14, t15, and t16.

In one embodiment, the fourth phase state is used as a critical transition phase for host energy output adjustment by identifying

The method for accurately identifying the/t curve inflection point specifically adopts a method for extracting the curve inflection point by calculating variance fluctuation quantity. The following were used:

establishing a storage array with element of 2n +1

In order to ensure that the calculation accuracy is ensured, an integer of n more than or equal to 10 is taken. By stacking, i.e. first-in-first-out, the new

Value, i.e.

The values are updated into an array, and the expression is as follows:

then, the average value of the left and right groups of data of the array is calculated by taking the nth element of the array as a central value

And

；

calculating the variance of the left and right data respectively

And

，

finally, the variance fluctuation amount of the array center is calculated

。

When it is detected

When the value exceeds the limit threshold value, determining that the rate of the ratio reduction at the current moment meets the set requirement, and judging that the ratio reduction at the current moment meets the set requirement

The curve has a larger inflection point, and the host enters a fourth stage state.

In one example, after the step of controlling the output energy of the host at the current moment according to the preset current value, the method further includes: and controlling to change the output prompt tone so as to remind.

Specifically, in the fourth stage state, when the host detects that the tissue is about to be detached or has been detached, the energy output is appropriately reduced and the user is prompted by a prompt tone about the current tissue state, so that the user controls the energy output of the host. For example, the alert tone may be a change firing alert sound or a screen change alert tone. Through the prompt tone, can indicate the user and prepare to stop arousing to realize reducing the purpose that the tissue pad weared and torn the extension tool bit life.

In an embodiment, the controlling the energy output of the host at the current moment according to the ratio of the current moment includes: determining the tissue state of the tissue cut by the ultrasonic cutter head at the current moment according to the ratio of the current moment; determining the output current value of the host at the current moment according to the organization state; and controlling the output energy of the host at the current moment according to the output current value.

It should be explained that: the ultrasonic knife system can be divided into a plurality of stage states in one tissue cutting process, and each stage state corresponds to one tissue state. For example, the plurality of tissue states include a state in which the tissue is gradually heated by cooling, a state in which the tissue cell walls of the tissue are destroyed and the interstitial fluid starts to be precipitated and vaporized, a state in which the tissue is gradually dried, and a state in which the tissue is about to be cut or has been cut.

Wherein, under each tissue state, the ratio of the variation of the output power of the host machine to the frequency variation of the ultrasonic scalpel head is different. Based on this ratio, the tissue state of the tissue can be determined. Therefore, when the ratio of the variation of the output power of the host at the current moment to the variation of the frequency of the ultrasonic cutter head is determined, the tissue state at the current moment can be determined, and then the output current value of the host at the current moment is determined based on the tissue state so as to control the output energy of the host at the current moment. Therefore, the energy output of the host can be specifically adjusted according to the tissue state, so that the tissue outputs proper energy action when in each stage, and particularly, the tissue state outputs energy matched with the tissue state in the third stage state and the fourth stage state, so as to improve the cutting and coagulation effects of the tissue.

In one example, determining a current-time tissue state of the tissue cut by the ultrasonic blade according to the current-time ratio includes: and calculating the thermal efficiency of the ultrasonic cutter head at the current moment according to the ratio of the current moment, the efficiency of converting the electric energy of the host into the mechanical energy and the correction coefficient, and determining the tissue state of the tissue cut by the ultrasonic cutter head at the current moment according to the thermal efficiency.

Specifically, the calculation formula of the value of the thermal efficiency is:

in the above-mentioned formula,

For example, a tissue cutting process of the ultrasonic blade system can be divided into five stage states, and each stage state corresponds to one tissue state. The variation curve of the thermal efficiency values for each stage state is shown in fig. 5. As shown in fig. 5The curve 501 for stage 1 is the initial cutting stage, in which the tissue is gradually heated from a cooling state

The value change is gentle, and the stage 1 can be performed

Average value as initial value

(ii) a Stage 2 corresponds to curve 502, at which time the tissue cell wall is destroyed and the interstitial fluid begins to precipitate and gasify to take away part of the heat, resulting in a reduction in the thermal efficiency of the ultrasonic scalpel head

The value is increased; stage 3 corresponds to curve 503, where the tissue gradually dries and protein coagulates to gradually increase the thermal efficiency of the ultrasonic blade

The value is continuously reduced; stage 4 corresponds to curve 504 when the tissue is about to be severed or has been severed, and partial or full contact friction occurs between the ultrasonic blade and the tissue pad, resulting in a rapid temperature rise of the ultrasonic blade and a significant increase in thermal efficiency due to the tissue pad having a thermal conductivity of 0.25, which is much less than the thermal conductivity of the tissue of 0.577

The value decreases rapidly; stage 5 corresponds to curve 505, and is in a state of friction between the ultrasonic blade and the tissue pad, and the thermal efficiency of the stage is maintained to be larger than that of the state of cutting the tissue

The value remains in the lower state. According to

The change rule of the value in the cutting process can be judged onceAnd judging the stage state of the tissue in the cutting process, and adjusting the energy output strategy of the host according to the stage state.

Fig. 6 shows a schematic diagram of a control circuit for determining the output current value of the host at the current moment according to the organization state and controlling the output energy of the host at the current moment according to the output current value. As shown in FIG. 6, the actual output current setpoint of the main machine is

。

Current is given by the system

And the tissue state estimation module 601 is obtained through the decision of the output current adjustment strategy module 602. The tissue state estimation module 601 is configured to determine a tissue state of the tissue cut by the ultrasonic scalpel head at the current time according to the thermal efficiency at the current time, and determine an output current value of the host at the current time according to the tissue state. The output current adjustment policy module 602 is based on

And the output current value of the host determined by the tissue state estimation module 601

。

The ADC block 609 collects the current waveform of the Output block (Output) 608, and converts the current waveform into an Output current feedback value

. Multiplier 604 calculates

And

the error value is input to the PID regulator 605. The output value of the PID controller 605 is converted by the DAC block 606 to generate a driving signal, and the driving signal is output to the AMP block 607. Thus, a regulation process of real-time closed-loop control of the output current is formed.

In one embodiment, the determining the tissue state of the tissue cut by the ultrasonic blade at the current moment according to the ratio at the current moment includes: taking the initial excitation state of the main machine as a first stage state of the tissue, and acquiring the ratio of the variable quantity of the output power of the main machine in the first stage state to the variable quantity of the frequency of the ultrasonic cutter head; if the ratio of the current time is the same as the ratio of the first stage state, determining that the organization state of the current time is the first stage state; if the ratio of the current moment is larger than the ratio of the first stage state, determining that the organization state of the current moment is a second stage state; if the organization state at the previous moment is the second stage state and the ratio of the current moment is less than or equal to the ratio of the first stage state, determining that the organization state at the current moment is the third stage state; the above determining the output current value of the host at the current moment according to the organization state includes: if the organization state is the first stage state or the second stage state, determining the output current value of the host as the current value of the excitation current of the initial excitation state of the host; and if the organization state is the third-stage state, determining that the output current value of the host is the preset current value of the third-stage state.

As shown in fig. 5, the tissue cutting process of the ultrasonic blade system can be divided into five stages. As shown in fig. 5, the first stage state is stage 1, the second stage state is stage 2, the third stage state is stage 3, the fourth stage state is stage 4, and the fifth stage state is stage 5.

The ratio of the variation of the output power of the host machine at the current moment to the variation of the frequency of the ultrasonic cutter head is

(ii) a The set thermal efficiency is:

；

therefore, the ratio of the thermal efficiency to the variation of the output power of the main machine at the current moment and the variation of the frequency of the ultrasonic cutter head is in a linear and direct proportional relationship.

In this embodiment, the ratio of the variation of the output power of the thermal efficiency substitution machine to the variation of the frequency of the ultrasonic scalpel head is used as a reference standard for determining the state of each stage.

Referring to fig. 5, the first stage state is an initial cutting stage state of the ultrasonic blade system, and the thermal efficiency at the present time can be considered as the thermal efficiency generated by the initially set excitation current of the main machine. In the second stage state, the value of the thermal efficiency at the current moment is greater than that of the first stage state. In the first stage state and the second stage state, the host is controlled to keep outputting the initially set excitation current without adjusting the excitation current output by the host. When the ultrasonic scalpel system enters the third stage state from the second stage state, the value of the thermal efficiency is reduced to be smaller than or equal to the value of the first stage state, and at the moment, the tissue state at the current moment can be determined to be the third stage state in a mode of detecting that the value of the thermal efficiency at the current moment is smaller than or equal to the value of the thermal efficiency at the first stage state. When the organization state is the third stage state, the output current value of the control host is the preset current value of the third stage state.

In an example, the preset current value of the third-stage state is determined in the following manner: acquiring the ratio of the first stage state to the ratio of the third stage state to obtain a target ratio; acquiring the current value of the excitation current of the initial excitation state of the host; and determining the preset current value of the third-stage state according to the target ratio and the current value of the excitation current.

Further, the determining the current value of the preset third-stage state according to the target ratio and the current value of the excitation current includes: acquiring a first weight and a second weight, wherein the first weight is associated with a target ratio, and the second weight is associated with the current value of the excitation current; obtaining a product of the first weight and the target ratio to obtain a first product value; obtaining a product of the second weight and the current value of the excitation current to obtain a second product value; and determining the preset current value of the third-stage state according to the sum of the first product value and the second product value.

In this embodiment, the ratio of the first stage state and the ratio of the third stage state are subjected to ratio processing to obtain a target ratio. The ratio of the states of each stage is calculated by formula

And (5) determining. Based on the above calculation formula of thermal efficiency, the ratio of each stage state is in linear direct proportion with the thermal efficiency of each stage state. Therefore, the ratio of the thermal efficiency by the respective stage states is equal to the target ratio. And further, determining a preset current value of the third-stage state according to the ratio of the thermal efficiency and the current value of the excitation current.

Specifically, the excitation current of the initial state of the host is

The value of the thermal efficiency at the present time is

. Let the thermal efficiency value of the third stage state be

. The thermal efficiency value of the first stage state is

. The current value of each stage state is

. The preset current value of the third stage state is based on

、

And

and (4) determining. That is, the current value of the third stage state is based on

And

and (4) determining.

Further, the air conditioner is provided with a fan,

there is a correspondence to a first weight that,

and (4) corresponding to the second weight, and performing sum value processing after the product processing of the two weights. The first weight may be 0.3 and the second weight may be 0.7. The current value of the third stage state can be determined by the following formula:

。

therefore, the current control of the first three stage states in one tissue cutting process of the ultrasonic knife system can be realized through the embodiment.

For the fourth stage state in one tissue cutting process of the ultrasonic knife system, it can be determined by the above-mentioned embodiment that when it is recognized that the rate of decrease of the ratio at the current time meets the set requirement, the tissue state at the current time is determined to be the fourth stage state. The host determines the manner of entering the fourth stage state and the manner of controlling the current in the fourth stage state, see the above embodiments.

Specifically, as can be seen from fig. 5, when the cutting process enters the fourth stage state 504, the temperature of the ultrasonic blade head rapidly rises, and the thermal efficiency significantly rises, and the value of the thermal efficiency

Value of thermal efficiency

And rapidly decreases. By presetting the setting requirements, by which the value of the thermal efficiency is identified, i.e. by setting the requirements

And the value is in a state of being rapidly reduced, and whether the cutting process enters a fourth stage state is further judged. Specifically, when it is detected that the rate of decrease of the thermal efficiency value at the current time satisfies the setting requirement, it is determined that the tissue state at the current time is the fourth stage state.

And when the tissue state is determined to be the fourth stage state, acquiring a current value of the fourth stage state. The preset current value of the fourth stage state is manually configured in advance, and the output current value of the control host is the preset current value of the fourth stage state. Therefore, when the ultrasonic knife system enters the fourth stage state, the output energy of the main machine can be adjusted, so that the output energy of the main machine is matched with the tissue state of the fourth stage state, and the ultrasonic knife head is under the action of proper energy in the fourth stage state, so that the cutting and coagulation effects of the tissue are improved.

By integrating the stage states of the tissue, it should be noted that the above-mentioned one cutting process of the tissue is divided into 5 stage states. However, as shown in FIG. 5, the fourth phase state is a short transition, and the tissue in the fourth phase state and the fifth phase state is about to be or has been severed. In practical applications, it is sufficient to identify the fourth stage state and control the output energy of the host in the fourth stage state.

It may be that the output current value of the host in each phase state is determined with reference to the following output current allocation strategy:

therefore, the output energy of the ultrasonic knife system is adapted to the tissue state in the actual cutting process, the blood coagulation effect of the ultrasonic knife head is considered under the condition that the cutting speed of the ultrasonic knife head is not obviously reduced, and the clinical adaptability of the ultrasonic knife system is effectively improved. In addition, through the discernment to tissue off-line state in time reduce the output energy of host computer and indicate the user, effectively reduced the wearing and tearing of tissue and prolonged supersound tool bit life.

The present application further provides an energy output control device for an ultrasonic blade system. In one embodiment, as shown in FIG. 7, an energy output control apparatus of an ultrasonic blade system includes a first acquisition module 702, a second acquisition module 704, a third acquisition module 706, and a control module 708. A first obtaining module 702, configured to obtain a variation of an output power of a host at a current time of the ultrasonic blade system; a second obtaining module 704, configured to obtain a frequency variation of the ultrasonic scalpel head of the ultrasonic scalpel system at the current time; a third obtaining module 706, configured to obtain a ratio of the variation of the output power at the current time to the frequency variation at the current time; and the control module 708 is configured to control the energy output of the host at the current moment according to the ratio of the current moment.

In one embodiment, identifying that the rate at which the ratio at the current time decreases satisfies the set requirement includes: obtaining the ratio of the variable quantity of the output power of the host machine to the variable quantity of the frequency of the ultrasonic cutter head at multiple historical moments; calculating the variance of the ratio of the variation of the output power of the hosts at a plurality of moments in the front sequence to the variation of the frequency of the ultrasonic scalpel head, and calculating the variance of the ratio of the variation of the output power of the hosts at a plurality of moments in the back sequence to the variation of the frequency of the ultrasonic scalpel head; calculating the fluctuation amount of the ratio at the current moment according to the variance at the front of the sequence and the variance at the back of the sequence; and determining that the rate of the ratio reduction at the current moment meets the set requirement according to the fluctuation amount.

In one embodiment, the predetermined current value is

；

wherein ,

is a preset current value, and is used as a current value,

In one embodiment, after controlling the output energy of the host at the current moment according to the preset current value, the method further includes: and controlling to change the output prompt tone so as to remind.

which is indicative of the temperature at any one time,

to represent

The frequency of the ultrasonic cutter head at the corresponding moment,

and

respectively, represent constants.

Determining the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment; wherein,

the amount of change in the temperature is indicated,

indicating the amount of change in output power at the present time,

which is indicative of the output power of the host,

indicating the efficiency of converting electrical energy of the host into mechanical energy,

which is indicative of the correction factor(s),

which indicates the current time of day,

indicating a historical preset time.

For specific definition of the energy output control device of the ultrasonic blade system, reference may be made to the above definition of the energy output control method of the ultrasonic blade system, and details thereof are not repeated here. The various modules in the energy output control apparatus of an ultrasonic blade system described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a computer device is provided that may be an energy master of an ultrasonic surgical system. As shown in fig. 8, a processor, a nonvolatile storage medium, an internal memory, a network interface, and an input device are provided in the energy host. The host computer implements a method of energy output control for an ultrasonic blade system of the present application when a computer program in a computer readable storage medium of a non-volatile storage medium is executed by a processor.

Those skilled in the art will appreciate that the architecture shown in fig. 8 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program: acquiring the variable quantity of the output power of a host of the ultrasonic scalpel system at the current moment; acquiring the frequency variation of the ultrasonic knife head of the ultrasonic knife system at the current moment; acquiring the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment; and controlling the energy output of the host at the current moment according to the ratio of the current moment.

In one embodiment, when the processor executes the computer program to implement the step of controlling the energy output of the host at the current time according to the ratio of the current time, the following steps are specifically implemented: if the speed of the ratio reduction at the current moment is identified to meet the set requirement, acquiring a preset current value; and controlling the output energy of the host at the current moment according to the preset current value.

In one embodiment, when the processor executes the computer program to implement the step of identifying that the rate of decrease of the ratio at the current time meets the set requirement, the following steps are specifically implemented: acquiring the ratio of the output power variation of the host machine to the frequency variation of the ultrasonic cutter head at multiple historical moments; calculating the variance of the ratio of the variation of the output power of the hosts at a plurality of moments in the front sequence to the variation of the frequency of the ultrasonic scalpel head, and calculating the variance of the ratio of the variation of the output power of the hosts at a plurality of moments in the back sequence to the variation of the frequency of the ultrasonic scalpel head; calculating the fluctuation amount of the ratio of the current moment according to the variance in the front sorting and the variance in the back sorting; and determining that the rate of the ratio reduction at the current moment meets the set requirement according to the fluctuation amount.

In one embodiment, the predetermined current value is

；

wherein ,

is a preset current value, and is used as a current value,

In one embodiment, the processor executing the computer program further performs the steps of: and controlling to change the output prompt tone so as to remind.

In one embodiment, when the processor executes the computer program to implement the step of obtaining the ratio of the variation of the output power at the current time to the variation of the frequency at the current time, the following steps are specifically implemented: determining the temperature variation of the ultrasonic cutter head at the current moment according to the frequency variation at the current moment; and determining the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment according to the ratio of the variable quantity of the output power at the current moment to the variable quantity of the temperature.

In one embodiment, the processor executes a computer program to implement the above-described method according to the present inventionWhen the step of determining the temperature variation of the ultrasonic scalpel head at the current moment according to the frequency variation at the moment, the following steps are specifically realized: according to

which is indicative of the temperature at any one time,

to represent

The frequency of the ultrasonic cutter head at the corresponding moment,

and

respectively, represent constants.

In one embodiment, when the processor executes the computer program to implement the step of determining the ratio of the variation of the output power at the current time to the variation of the frequency at the current time according to the ratio of the variation of the output power at the current time to the variation of the temperature, the following steps are specifically implemented: according to

the amount of change in the temperature is indicated,

indicating the amount of change in output power at the present time,

which is indicative of the output power of the host,

which is indicative of the correction factor(s),

which indicates the current time of day,

representing a historical preset time.

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of: acquiring the variable quantity of the output power of a host at the current moment of the ultrasonic scalpel system; acquiring the frequency variation of the ultrasonic knife head of the ultrasonic knife system at the current moment; acquiring the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment; and controlling the energy output of the host at the current moment according to the ratio of the current moment.

In one embodiment, when the computer program is executed by the processor to implement the step of controlling the energy output of the host at the current time according to the ratio at the current time, the following steps are specifically implemented: if the speed of the ratio reduction at the current moment is identified to meet the set requirement, acquiring a preset current value; and controlling the output energy of the host at the current moment according to the preset current value.

In one embodiment, when the computer program is executed by the processor to implement the step of recognizing that the rate of decrease of the ratio at the current time meets the set requirement, the following steps are specifically implemented: obtaining the ratio of the variable quantity of the output power of the host machine to the variable quantity of the frequency of the ultrasonic cutter head at multiple historical moments; calculating the variance of the ratio of the variation of the output power of the hosts at a plurality of moments in the front sequence to the variation of the frequency of the ultrasonic scalpel head, and calculating the variance of the ratio of the variation of the output power of the hosts at a plurality of moments in the back sequence to the variation of the frequency of the ultrasonic scalpel head; calculating the fluctuation amount of the ratio of the current moment according to the variance in the front sorting and the variance in the back sorting; and determining that the rate of the ratio reduction at the current moment meets the set requirement according to the fluctuation amount.

In one embodiment, the predetermined current value is

；

wherein ,

is a preset current value, and is used as a current value,

In one embodiment, the computer program when executed by the processor further performs the steps of: and controlling to change the output prompt tone so as to remind.

In one embodiment, when the computer program is executed by the processor to implement the above step of obtaining the ratio of the variation of the output power at the current time to the variation of the frequency at the current time, the following steps are specifically implemented: determining the temperature variation of the ultrasonic cutter head at the current moment according to the frequency variation at the current moment; and determining the ratio of the variable quantity of the output power at the current moment to the variable quantity of the frequency at the current moment according to the ratio of the variable quantity of the output power at the current moment to the variable quantity of the temperature.

In one embodiment, when the computer program is executed by the processor to implement the step of determining the temperature variation of the ultrasonic blade at the current time according to the frequency variation at the current time, the following steps are specifically implemented: according to

which is indicative of the temperature at any one time,

to represent

The frequency of the ultrasonic blade tip at the corresponding time, and

respectively, represent constants.

In one embodiment, when the computer program is executed by the processor to implement the above-mentioned step of determining the ratio of the variation of the output power at the current time to the variation of the frequency at the current time according to the ratio of the variation of the output power at the current time to the variation of the temperature, the following steps are specifically implemented: according to

the amount of change in the temperature is indicated,

indicating the amount of change in output power at the present time,

which is indicative of the output power of the host,

which is indicative of the correction factor(s),

which is indicative of the current time of day,

representing a historical preset time.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), rambus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method of energy output control of an ultrasonic blade system, the method comprising:

acquiring the variable quantity of the output power of the host at the current moment of the ultrasonic knife system;

acquiring the frequency variation of the ultrasonic knife head of the ultrasonic knife system at the current moment;

acquiring a ratio of the variation of the output power at the current time to the frequency variation at the current time;

and controlling the energy output of the host at the current moment according to the ratio of the current moment.

2. The method of claim 1, wherein said controlling the energy output of the host at the current time based on the ratio at the current time comprises:

if the rate of the ratio reduction at the current moment is identified to meet a set requirement, acquiring a preset current value;

and controlling the output energy of the host at the current moment according to the preset current value.

3. The method of claim 2, wherein the identifying that the rate at which the ratio at the current time decreases satisfies a set requirement comprises:

obtaining the ratio of the variation of the output power of the host machine to the variation of the frequency of the ultrasonic cutter head at multiple historical moments;

calculating the variance of the ratio of the variation of the output power of the main machine to the variation of the frequency of the ultrasonic scalpel head at a plurality of moments in the history according to the time sequence, the variance of the ratio of the variation of the output power of the main machine to the variation of the frequency of the ultrasonic scalpel head at a plurality of moments in the front sequence, and the variance of the ratio of the variation of the output power of the main machine to the variation of the frequency of the ultrasonic scalpel head at a plurality of moments in the back sequence;

calculating the fluctuation amount of the ratio at the current moment according to the variance at the front sorting and the variance at the back sorting;

and determining that the rate of the ratio reduction at the current moment meets a set requirement according to the fluctuation amount.

4. The method of claim 2, wherein the preset current value is linear with respect to a current value of the excitation current of the initial excitation state of the host.

5. The method of claim 4, wherein the predetermined current value is

；

wherein ,

is the preset current value, and the current value is set,

a is a constant greater than 0 and less than 1, which is a current value of an excitation current of an initial excitation state of the main machine.

6. The method according to claim 2, wherein the step of controlling the output energy of the host at the current moment according to the preset current value is followed by further comprising:

and controlling to change the output prompt tone so as to remind.

7. The method according to claim 1, wherein the amount of change in the output power at the present time is determined based on an accumulated amount of output power for a period of time between the present time of the host and a historical preset time;

and/or the presence of a gas in the gas,

the frequency variation at the current moment is determined based on a difference between the operating frequency of the host at the current moment and the operating frequency of the host at a historical preset moment.

8. The method according to claim 1, wherein said obtaining a ratio of a variation of the output power at the current time to the variation of the frequency at the current time comprises:

determining the temperature variation of the ultrasonic cutter head at the current moment according to the frequency variation at the current moment;

and determining the ratio of the variation of the output power at the current moment to the frequency variation at the current moment according to the ratio of the variation of the output power at the current moment to the temperature variation.

9. The method of claim 8, wherein determining the temperature change of the ultrasonic blade at the current time according to the frequency change at the current time comprises:

according to

Determining the temperature of the ultrasonic cutter head at each moment, and determining the temperature variation of the ultrasonic cutter head at the current moment according to the temperature of the ultrasonic cutter head at each moment;

wherein ,

which is indicative of the temperature at any one time,

to represent

The frequency of the ultrasonic cutter head at the corresponding moment,

and

respectively, represent constants.

10. The method according to claim 8, wherein the determining the ratio of the change amount of the output power at the current time to the change amount of the frequency at the current time according to the ratio of the change amount of the output power at the current time to the change amount of the temperature includes:

according to

Determining a ratio of a variation of the output power at the current time to the frequency variation at the current time;

wherein ,

represents a ratio of a variation amount of the output power at the current time to the variation amount of the frequency at the current time,

the amount of change in the temperature is indicated,

represents a variation amount of the output power at the present time,

is indicative of the output power of the host,

representing the efficiency of the conversion of the host electrical energy to mechanical energy,

which is indicative of the correction factor(s),

which indicates the current time of day,

representing a historical preset time.

11. An energy output control device for an ultrasonic blade system, the device comprising:

the first acquisition module is used for acquiring the variable quantity of the output power of the host at the current moment of the ultrasonic scalpel system;

the second acquisition module is used for acquiring the frequency variation of the ultrasonic knife head of the ultrasonic knife system at the current moment;

a third obtaining module, configured to obtain a ratio of a variation of the output power at the current time to the frequency variation at the current time;

and the control module is used for controlling the energy output of the host at the current moment according to the ratio at the current moment.

12. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method of any of claims 1 to 10 are implemented by the processor when executing the computer program.

13. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 10.