CN208017581U - A kind of RF ablation device - Google Patents
A kind of RF ablation device Download PDFInfo
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- CN208017581U CN208017581U CN201720495058.7U CN201720495058U CN208017581U CN 208017581 U CN208017581 U CN 208017581U CN 201720495058 U CN201720495058 U CN 201720495058U CN 208017581 U CN208017581 U CN 208017581U
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Abstract
The utility model discloses a kind of RF ablation devices, it is related to RF ablation field, this RF ablation device described in the utility model, by combining RF ablation and multielectrode function, radio-frequency power control is provided separately for each electrode, and ablation and the electrode measured are shared, reach reduction ablation time, ablation difficulty is reduced, increases the safety of ablation, the purpose of better ablation effect is provided.RF ablation device described in the utility model flexibly controls radio-frequency power, can effectively control degree of ablation by measuring the temperature value of ablation site in real time, it is not easy to the phenomenon that generating incomplete ablation or excessive calcination.
Description
Technical field
The utility model is related to RF ablation field more particularly to a kind of RF ablation devices.
Background technology
The principle of RF ablation is the electromagnetic wave for utilizing certain frequency range (200k-500kHz) interior radiance very low,
Fuel factor effect is generated in face of organism, makes portion of tissue coagulation necrosis.
Kidney RF ablation denervation system is specially designed to deliver low-level RF energy by the wall of the arteria renalis
To realize the instrument of renal denervation, it is a kind of quick and wieldy advanced technology, provides single track energy, can have safely
Treat uncontrolled hypertension in effect ground.
In the prior art, kidney RF ablation uses single electrode, radio-frequency power to be difficult to accurately control more, also needs additional hand
Section such as B ultrasound checks ablation effect in real time, not only extends operating time in this way, increases patient's pain, and operative doctor operates
Come also not very convenient.
Therefore, those skilled in the art is dedicated to developing a kind of RF ablation device, is shared using multi-electrode, and real
The now independent control of each electrode radio-frequency energy, ablation effect can be checked in real time by not needing additional means.
Utility model content
In view of the drawbacks described above of the prior art, technical problem to be solved in the utility model be how to accurately control it is more
The energy of the RF ablation of electrode discharges, and quickly and easily reaches ablation effect.
To achieve the above object, the utility model provides a kind of RF ablation device, including radio frequency generation module, measurement
Module, control process module, the radio frequency generation module and the measurement module are connected with the control process module, described to penetrate
Frequency generation module is configured as with temperature feedback control radio-frequency power.
Further, further include electrode module, wherein a part of electrode in the electrode module is configured as radio frequency electrical
Pole, another part electrode are configured as detecting electrode.
Further, further include electrode module, wherein the electrode module is configured as radio-frequency electrode and detecting electrode is total
With.
Further, the measurement module measures the temperature value and impedance value of ablation site by detecting electrode in real time.
Further, the control process module is configured as handling the measurement module returned data, and root
According to radio frequency generation module described in the further closed-loop control of the result of processing.
Further, the closed-loop control is PID control.
Further, the detection module further includes temperature sensor.
Further, the data that the measurement module returns include temperature value and impedance value.
Further, the measurement module is configured as the conduction of the current measurement ablation site using detecting electrode excitation
State judges degree of ablation.
Further, the RF ablation device further includes human-computer interaction module.
Further, the human-computer interaction module is touch display screen.
RF ablation device described in the utility model includes that module, measurement module, electrode module and control occur for radio frequency
Processing module, wherein electrode module includes temperature sensor and multiple electrodes；Radio frequency occur module and measurement module respectively with electricity
Pole module is connected, and measurement module includes temperature measurement unit and impedance measuring unit；It includes radio-frequency drive list that module, which occurs, for radio frequency
Member and the loop of rf unit；Module occurs with radio frequency for control process module and measurement module is connected, for controlling each channel
The judgement of the feedback processing and ablation effect of radio-frequency emission power and measurement data.
RF ablation control described in the utility model includes ablation control device generation RF energy, and according to setting
The temperature value of program and the ablation site obtained by measurement module, controls the RF energy of generation；According to default
Program generate excitation current, receive the survey that radio-frequency drive unit and the loop of rf unit are measured using excitation current
Amount is as a result, judge whether ablation succeeds；The electrode module receives RF energy and carries out RF ablation；Simultaneously by ablation site
Temperature value returns to control process module；The excitation current generated using radio-frequency drive unit and the loop of rf unit is to ablation site
Measurement result is returned to control process module by the measurement for carrying out conduction state.
Radio frequency occurs module and generates continuous rf modulated signal, and control process module changes according to state modulator instruction penetrates
The amplitude of frequency signal, radio-frequency power are amplified, and the radiofrequency signal by amplitude modulation is amplified, and make up to specified power electricity
It is flat.Radiofrequency signal is separately connected two electrodes after power amplification, and one of electrode is active electrode, another is
Leading electrode, radiofrequency signal generate fuel factor in surrounding tissue by electrode, ablation of tissue occur.Temperature sensor measurement goes out group
The temperature for knitting surrounding is sent to control process module after acquisition and transformation.Pid algorithm built in control process module calculates
New state modulator instruction, adjusts the size of radio-frequency voltage so that within the scope of the temperature at ablation is maintained at preset.Electrode
For any two in mould multiple electrodes in the block for melting, another two can real-time measurement temperature value, real time monitoring and evaluation
Ablation effect.
As shown in figure 3, improved pid algorithm described in the utility model using starting stage radio-frequency voltage linear rise,
Decline meets and limits weakening integral, the algorithm that differential detaches so that the temperature starting stage rises soon and overshoot is small, avoids integrated depth
It is full, accelerate the dynamic response of entire feedback control.
In the starting stage of radio-frequency transmissions, tissue temperature rapid increase, when temperature is close to setting value, according to temperature rise
Rate reduces radio-frequency voltage automatically, and climbing speed is bigger, and voltage reduction is faster, then carries out conventional PID control again, prevents often
The rule initial overshoot of pid algorithm is excessive, and temperature value shakes excessive phenomenon.
During ablation, since pid algorithm has certain control range, it is super go beyond the scope after integrate and tend to
Saturation state, at this time system output will present the state of apparent overshoot.It is described in the utility model in order to avoid this phenomenon
Pid algorithm just only weakens integral term operation once finding that control variable enters saturation state.
When measured temperature and preset value difference are larger, pid algorithm introducing is differentiated, so that measured value quickly approaches
Preset value, when measured value is close to preset value, when difference is smaller, removal is differentiated, in case temperature control is shaken.
This RF ablation device described in the utility model, by combining RF ablation and multielectrode function
Come, radio-frequency power control is provided separately for each electrode, and ablation and the electrode measured is public, when reaching reduction ablation
Between, ablation difficulty is reduced, increases the safety of ablation, the purpose of better ablation effect is provided.Disappeared simultaneously by measuring in real time
The temperature value for melting position flexibly controls RF energy, can effectively control degree of ablation, it is not easy to generate ablation not
The phenomenon that complete or excessive calcination.
The technique effect of the design of the utility model, concrete structure and generation is made furtherly below with reference to attached drawing
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Description of the drawings
Fig. 1 is the RF ablation device front view of a preferred embodiment of the utility model；
Fig. 2 is the RF ablation device flow chart of a preferred embodiment of the utility model；
Fig. 3 is the flow chart of the improved pid algorithm of a preferred embodiment of the utility model；
Fig. 4 is the radio-frequency power controlling curve figure of a preferred embodiment of the utility model.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, develop simultaneously implementation referring to the drawings
The utility model is further described in example.
As shown in Figure 1, the front panel of this RF ablation device described in the utility model includes floor push connector
1, the loop of rf connector 2,8- feet radio frequency connector 3 and touch display screen, wherein floor push connector 1 is used for connecting pin
Switch is stepped on, the enabled of radio-frequency voltage is controlled and goes to enable.The loop of rf connector 2 is used for and radio-frequency electrode forms radio frequency and returns together
Road, 8- feet radio frequency connector 3 are used to connect radio-frequency electrode and shared measuring electrode and temperature sensor.In touch display screen
The temperature value of each ablating electrode of real-time display and the percent change in prefixed time interval.Part in touch display screen
The opening of also some function buttons, including general view, adherent detection, radio-frequency power setting, the selection of left and right kidney and radio-frequency power
And close button.
The operating process of this RF ablation device described in the utility model is as follows：
RF ablation device is accessed into local alternating current source, is then turned on the power switch, the cable being adapted in connection.Acquiescence
Power and time preset value when being arranged, user oneself can be adjusted when having some settings.It is supervised in real time when RF ablation device
Control the temperature value at ablating electrode.The transmitting activation of radiofrequency signal is by the activation switch or floor push on touch screen.
Usage state diagram into serious error pattern when system encounters following event as shown in Fig. 2, can only pass through closing
AC power can just exit this pattern, such as Fault state power-on self-tests are unsuccessful；ROM CRC failures；RAM fails；Timer
Failure；Impedance detection fails；Temperature circuit detection failure；Fan mistake；Key errors；Radiate mistake；Environment temperature mistake.
When system starts, MCU can initialize system, and in initialization procedure, radio frequency does not have any output.If MCU
Initialization normally completes, and system will carry out power-on self-test POST flows.In POST flows, if there is any step fails, directly
Connect key error state.If whole POST flows pass through, it is transformed into ready state.
In the standby state, screen connection probe (conduit), display connect the output of no RF energy, radio circuit also by
It is set as to work, continues the connection of detection probe (conduit).After detecting the correct connection of probe (conduit), it is transferred to standard
It is standby to finish state.
The user interface of ready state is divided into two parts up and down, and top is divided into control button, and lower part is divided into electrode selection
Button, control button include summarize button, adherent detection button, power add and subtract button, the time add and subtract button, left and right kidney selection and
RF switch button.Power initial value is 6.5 watts, can be adjusted to 10 watts from 0.1 watt, often by once increasing or decreasing 0.1 watt.When
Between initial value be 60 seconds, 120 seconds can be adjusted to from 1 second, often by once increasing or decreasing 1 second.Left and right kidney select button, default value
For left kidney.RF switch button is defaulted as radio frequency pass.
Electrode select button can open and close corresponding electrode, and show what measurement in real time obtained on button electrode
Temperature value and radio-frequency power value.
No.1 electrode is proximate to the contact at tip, and for No. four electrodes close to handle, tip is the distal end of the probe (conduit),
Handle is the proximal end of the probe (conduit).Each button or system sends out prompt tone when trampling floor push.Continuous measure is visited
The temperature value of needle (conduit).
When temperature value is when between 15 DEG C to 85 DEG C, system can allow to export radio-frequency power, when radio-frequency power starts to send out
After penetrating, radio frequency close button is for effective status.During radio-frequency power exports, continue detecting system mistake, once
Detect that mistake, system switch to error condition from ready state at once.
Persistently if detection temperature value, not in section, shows error message whether between 15 DEG C to 85 DEG C, including
" temperature out of range ".The effective connection for persistently detecting conduit and dispersive electrode, when detecting that conduit is not connected with, display " connection
Conduit " shows impedance over range when detection all dispersive electrodes are not connected, it means that ablating electrode adherent feelings in the blood vessels
Condition is bad.
System continuously controls and monitors the output of RF energy when radio-frequency power exports.
As shown in figure 4, radio frequency output algorithm：The first step, before the setting value for reaching radio frequency power output, often with 0.5
Watt speed per second gradually rises radio frequency power output.Second step, the radio frequency power output for maintaining output set, once monitoring
Temperature rise at ablation automatically turns down 1 watt of radio frequency power output (testing temperature again after waiting for 2 seconds, to determine every time to 70 DEG C
Whether continue to automatically turn down radio frequency power output), if temperature value is not above 70 DEG C, radio frequency power output is not adjusted
It is whole, until ablation terminates.Once monitoring that adherent temperature is more than 85 DEG C, then radio frequency output is closed.
Between during radio frequency exports, system continuously monitors the situation of change of impedance.After conduit enters ablation locations
After completing spiral-shaped expansion, the impedance of system monitoring should decreased significantly, or after melting successfully, detect impedance all
It should decreased significantly.If fall is less than 10%, system needs to send out prompt messages.Impedance fall
Calculation formula is：
(current value-initial value)/initial value * 100%
After the completion of radio frequency output, with 0.5 watt of energy, 300 milliseconds of time, a defeated dose form detects radio-frequency pulse
Internal load.If dose form output test is normal, it is switched to radio frequency output completion status.
User can observe current ablation situation on a display screen, be included in left kidney or right kidney, which contact electrode
In use and in the ablation quantity of each kidney.
MCU is initialized
Carried out at once after powering on, radio-frequency signal generator can be arranged DAC output and radio frequency enable bit be 0, test system ROM and
RAM.If initialization does not complete, enter error pattern.
POST power-on self-test patterns
After MCU initialization is completed, system testing switch, display, touch screen and buzzer.Radio-frequency signal generator output one
The radio-frequency pulse of a low energy detects radio-frequency transmissions function and calibration to the impedance of 100 Ω of inside.Radiofrequency launcher also can
Detect temperature measuring equipment.If POST is smoothly completed, enter ready mode, otherwise enters error pattern.
Error pattern
In error pattern, screen can be shown in error message, including the number of mistake and position, and specific error message
Hold and suggests in next step.All user control buttons are tested all for inactive state.When user presses power supply close button
When, buzzer sends out long.Error pattern can only be exited by closing power supply, under error pattern, be stopped all
RF energy exports, and all radio-frequency signal generator functions will be reset by input power.
Standby mode
System enters standby mode, screen display " linking probe " after POST patterns smoothly complete.In stand-by mode,
There is no radio frequency output, the monitoring without impedance and temperature.
Ready mode
After detecting that probe has connected, into ready mode.System monitors impedance and temperature in real time.When the loop of rf connects
After, radio-frequency signal generator can export a low radio-frequency power to measure impedance.When temperature is not between 15 DEG C to 85 DEG C, or
Impedance between 500 Europe, does not have linking probe either or does not monitor adherent good not in 50 Europe.Dispersive electrode contacts
It is bad, into error pattern.
RF ablation device described in the utility model can accurately deliver controlled RF energy by multiple electrode catheter.
RF ablation device user interface is touch screen design, and radio-frequency signal generator can be provided with the frequency of about 480kHz and be up to 40 watts
Power.
By the above embodiments as it can be seen that this RF ablation device of the utility model, by by RF ablation and mostly electric
The function of pole combines, and radio-frequency power control is provided separately for each electrode, and ablation and the electrode measured is public, reaches
To ablation time is reduced, ablation difficulty is reduced, increases the safety of ablation, the purpose of better ablation effect is provided.Lead to simultaneously
The temperature value for measuring ablation site in real time is crossed, RF energy can flexibly be controlled, can effectively control degree of ablation, no
Easy to produce the phenomenon that melting incomplete or excessive calcination.
The preferred embodiment of the utility model described in detail above.It should be appreciated that this field ordinary skill without
It needs creative work according to the present utility model can conceive and makes many modifications and variations.Therefore, it is all in the art
Technical staff on the basis of existing technology can by logical analysis, reasoning, or a limited experiment according to the design of the utility model
It, all should be in the protection domain being defined in the patent claims with obtained technical solution.
Claims (11)
1. a kind of RF ablation device, which is characterized in that described including radio frequency generation module, measurement module, control process module
Radio frequency generation module and the measurement module are connected with the control process module, and the radio frequency generation module is configured as with temperature
Spend feedback control radio-frequency power.
2. RF ablation device as described in claim 1, which is characterized in that further include electrode module, wherein the electrode mould
A part of electrode in the block is configured as radio-frequency electrode, and another part electrode is configured as detecting electrode.
3. RF ablation device as described in claim 1, which is characterized in that further include electrode module, wherein the electrode mould
Block is configured as radio-frequency electrode and detecting electrode shares.
4. the RF ablation device as described in claims 1 or 2 or 3, which is characterized in that the measurement module passes through detecting electrode
The temperature value and impedance value of ablation site are measured in real time.
5. the RF ablation device as described in claims 1 or 2 or 3, which is characterized in that the control process module is configured as
The measurement module returned data is handled, and mould is generated according to radio frequency described in the further closed-loop control of the result of processing
Block.
6. RF ablation device as claimed in claim 5, which is characterized in that the closed-loop control is PID control.
7. RF ablation device as claimed in claim 5, which is characterized in that the measurement module further includes that temperature measures list
Member.
8. RF ablation device as claimed in claim 5, which is characterized in that the data that the measurement module returns include temperature
Value and impedance value.
9. RF ablation device as claimed in claim 5, which is characterized in that the measurement module is configured as utilizing detection electricity
The conduction state of the current measurement ablation site of pole excitation, judges degree of ablation.
10. RF ablation device as described in claim 1, which is characterized in that the RF ablation device further includes man-machine friendship
Mutual module.
11. RF ablation device as claimed in claim 10, which is characterized in that the human-computer interaction module is to touch to show
Screen.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720495058.7U CN208017581U (en) | 2017-05-05 | 2017-05-05 | A kind of RF ablation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720495058.7U CN208017581U (en) | 2017-05-05 | 2017-05-05 | A kind of RF ablation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108784829A (en) * | 2017-05-05 | 2018-11-13 | 上海安通医疗科技有限公司 | A kind of RF ablation device and RF ablation control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108784829A (en) * | 2017-05-05 | 2018-11-13 | 上海安通医疗科技有限公司 | A kind of RF ablation device and RF ablation control method |
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