WO2019109334A1 - Appareil et procédé permettant de mesurer la qualité de contact d'une plaque négative de bistouri électrique à haute fréquence - Google Patents

Appareil et procédé permettant de mesurer la qualité de contact d'une plaque négative de bistouri électrique à haute fréquence Download PDF

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Publication number
WO2019109334A1
WO2019109334A1 PCT/CN2017/115223 CN2017115223W WO2019109334A1 WO 2019109334 A1 WO2019109334 A1 WO 2019109334A1 CN 2017115223 W CN2017115223 W CN 2017115223W WO 2019109334 A1 WO2019109334 A1 WO 2019109334A1
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WIPO (PCT)
Prior art keywords
impedance
measuring
negative electrode
electrode plate
circuit
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Ceased
Application number
PCT/CN2017/115223
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English (en)
Chinese (zh)
Inventor
黄文星
鲁文
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Surgnova Healthcare Technologies (zhejiang) Co Ltd
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Surgnova Healthcare Technologies (zhejiang) Co Ltd
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Priority to PCT/CN2017/115223 priority Critical patent/WO2019109334A1/fr
Publication of WO2019109334A1 publication Critical patent/WO2019109334A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/16—Indifferent or passive electrodes for grounding
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant

Definitions

  • the present disclosure relates to the field of electrosurgical equipment, and in particular to a measuring device and method for measuring the contact quality of a negative electrode plate of a high-frequency electrosurgical device.
  • High-frequency electrosurgical knife (electric scalpel) is a commonly used device in surgery. As shown in Figure 2, it is a circuit structure of high-frequency electrosurgical knife.
  • 1 is a high-frequency electrosurgical unit, which converts AC mains into High-frequency high-voltage energy, its output forms a current loop with the electric knife, negative plate and human tissue
  • 2 is the surgical accessory electric knife pen, forming a current loop with the negative plate for cutting and coagulating the human tissue, and the switch on the same Control the output and shutdown of RF energy
  • 3 is the surgical accessory negative plate, also called neutral electrode, which is attached to the surface of human skin during actual use to provide a return path for RF energy. If the negative plate is poorly attached, it will cause skin burning and even burns.
  • the negative plate is an important part of the high-frequency electrosurgical knife.
  • the quality of contact with the human body has important significance. It is directly related to the safety of the operation. During the operation, the contact quality between the negative plate and the human body must be continuously and effectively detected. Ensure that the negative plate has good contact with the human body throughout the entire procedure.
  • FIG. 1 it is a test scheme for the contact quality of a conventional high-frequency electric knife negative plate.
  • the contact quality can be judged by the contact resistance of the negative electrode plate and the human body, and R1 and R2 are respectively two negative electrodes.
  • the equivalent resistance of the plate and the contacted human tissue, the impedance measuring chip is connected to both ends of the negative plate, and the external impedance (R1+R2) is excited by the signal generated by the internal frequency generator of the chip, and then the discrete Fourier is performed by the on-chip DSP.
  • the obtained sine wave signal is sent to the operational amplifier and the A/D conversion module for amplification and analog-to-digital conversion processing, and finally enters the system controller for system control of determination and response; the test scheme can be linearly and accurately measured
  • DFT Deform
  • the contact resistance of the total negative plate is not known, but the quality of the contact of the single negative plate cannot be judged. For example, if the contact of R1 is not good but the total impedance is within a reasonable range, this solution cannot be identified. How to solve the problem that the two-plate negative plate in the prior art cannot be accurately measured for asymmetric contact has become an urgent problem that designers need to solve.
  • An object of the present disclosure is to provide a measuring device and method for measuring the contact quality of a negative electrode plate of a high-frequency electrosurgical device, in order to at least partially solve the above technical problems.
  • the present disclosure provides a measuring device for measuring the contact quality of a negative electrode plate of a high-frequency electrosurgical device, which includes:
  • a first impedance measuring circuit for measuring an equivalent contact impedance between the first negative plate and the tested human body by an excitation method, and converting the measured first impedance signal into a first standard sine wave analog signal, inputting the first Op amp / AD module;
  • a first operational amplifier/AD module for amplifying and AD converting a standard sine wave analog signal input by the first impedance measuring circuit, and inputting the processed first digital signal to the system controller;
  • a second impedance measuring circuit for measuring an equivalent contact impedance between the second negative plate and the tested human body by an excitation method, and converting the measured second impedance signal into a second standard sine wave analog signal, inputting the second Op amp / AD module;
  • a second operational amplifier/AD module for amplifying and AD converting a standard sine wave analog signal input by the second impedance measuring circuit, and inputting the processed second digital signal to the system controller;
  • the system controller is configured to calculate the input first digital signal and the second digital signal, and analyze the contact quality of the negative electrode plate of the high-frequency electric knife device.
  • the present disclosure also provides a method for measuring a contact quality of a negative electrode plate of a high-frequency electrosurgical device, which is measured by a measuring device for a contact quality of a negative electrode plate of a high-frequency electrosurgical device as described above, It is characterized by the following steps:
  • the first/second impedance measuring circuit Measuring the equivalent contact impedance between the first/second negative plate and the tested human body by the first/second impedance measuring circuit, and converting the measured first/second impedance signals into the first/second standard a sine wave analog signal, respectively input to the first/second op amp/AD module to amplify and AD convert the input first/second standard sine wave analog signal, and then obtain the first/second digital signal thus obtained Enter the system controller separately;
  • the system controller compares the two based on the input first/second digital signals to determine whether there is a difference between the two values exceeding a preset threshold to determine whether there is impedance. Asymmetry.
  • the present disclosure can effectively realize the impedance detection function of the dual negative plate, and simultaneously solve the problem of unbalance detection of the double negative plate which cannot be solved by the prior art, and ensure that the high frequency electric knife device is safe and effective in use;
  • the double-channel negative plate paste unbalance detection problem of the present disclosure is effectively realized by separately detecting the impedance between the two negative electrode plates and the tissue, and comparing with a reasonable impedance range to determine whether each negative electrode plate is reliably adhered; the device of the present disclosure
  • the structure is simple, no expensive chip is needed, the detection sensitivity is high, and the anti-interference ability is strong.
  • Figure 1 is a block diagram showing the structure of a prior art measuring device
  • FIG. 2 is a schematic diagram of a current loop structure of a prior art high frequency electric knife
  • Figure 3 is a block diagram showing the structure of a measuring device of the present disclosure
  • FIG. 4 is a schematic structural view of a negative electrode plate with test leads of the present disclosure
  • FIG. 5 is a circuit diagram of an impedance measurement circuit of the measuring method of the present disclosure.
  • the present disclosure discloses a measuring device for the contact quality of a negative plate of a high-frequency electrosurgical device, comprising:
  • a first impedance measuring circuit for measuring an equivalent contact impedance between the first negative plate and the tested human body by an excitation method, and converting the measured first impedance signal into a first standard sine wave analog signal, inputting the first Op amp / AD module;
  • a first operational amplifier/AD module for amplifying and AD converting a standard sine wave analog signal input by the first impedance measuring circuit, and inputting the processed first digital signal to the system controller;
  • a second impedance measuring circuit for measuring an equivalent contact impedance between the second negative plate and the tested human body by an excitation method, and converting the measured second impedance signal into a second standard sine wave analog signal, inputting the second Op amp / AD module;
  • a second operational amplifier/AD module for amplifying and AD converting a standard sine wave analog signal input by the second impedance measuring circuit, and inputting the processed second digital signal to the system controller;
  • the system controller is configured to calculate the input first digital signal and the second digital signal, and analyze the contact quality of the negative plate of the high-frequency electric knife device.
  • the first/second impedance measuring circuit includes:
  • the two ends of the primary coil of the transformer are respectively connected to the two ends of the equivalent contact impedance between the first/second negative plate and the tested human body, and constitute a parallel resonant circuit with the first capacitor connected in parallel;
  • the stage coil is connected in series with the second capacitor, the first resistor and the excitation source of the LCR circuit to form an LCR series circuit;
  • the first/second impedance signal measured by the first/second impedance measuring circuit passes through the secondary output of the transformer.
  • the excitation source of the LCR circuit generates a pulse signal of 50-100 kHz.
  • the resonant frequency of the parallel resonant circuit formed by the primary of the transformer is preferably equal to the resonant frequency of the parallel resonant circuit of the secondary of the transformer to obtain a standard sinusoidal signal.
  • the third negative plate is disposed at a central position of the first negative plate and the second negative plate, and the third negative plate does not flow the main power current itself, but is used as the lead electrode in combination with the first negative plate and the second negative plate 2
  • the tissue impedance between the first negative plate and the third negative plate, and between the second negative plate and the third negative plate were respectively tested.
  • the system controller performs an addition calculation on the input first digital signal and the second digital signal, and performs size comparison.
  • the present disclosure also discloses a method for measuring the contact quality of a negative plate of a high-frequency electrosurgical device, which is measured by the measuring device for the contact quality of the negative plate of the high-frequency electrosurgical device as described above, comprising the following steps:
  • the first/second impedance measuring circuit Measuring the equivalent contact impedance between the first/second negative plate and the tested human body by the first/second impedance measuring circuit, and converting the measured first/second impedance signals into the first/second standard a sine wave analog signal, respectively input to the first/second op amp/AD module to amplify and AD convert the input first/second standard sine wave analog signal, and then obtain the first/second digital signal thus obtained Enter the system controller separately;
  • the system controller compares the two based on the input first/second digital signals to determine whether there is a difference between the two values exceeding a preset threshold to determine whether there is a phenomenon of impedance asymmetry.
  • the system controller also performs an arithmetic sum calculation based on the input first/second digital signals.
  • the system controller determines whether the negative plate is in poor contact with the human body based on whether the arithmetic and the result are between 10-150 ⁇ .
  • the preset threshold is 50 ⁇ .
  • 1 is a high-frequency electric knife main machine, which converts AC mains into high-frequency high-voltage energy, and its output forms a current loop with electric knife, negative plate and human tissue;
  • 2 is a surgical accessory electric pen, and negative plate Forming a current loop for cutting and coagulating human tissue, the switch on it is used to control the output and shutdown of the RF energy;
  • 3 is the surgical accessory negative plate, also called the neutral electrode, which is adhered to the surface of the human skin during actual use. Provides a return path for RF energy. If the negative plate is poorly attached, it will cause skin burning or even burns.
  • the negative plate is an important part of the high-frequency electric knife.
  • the quality of contact with the human body is of great significance and directly related to the safety of surgery. During the operation, the contact quality between the negative plate and the human body must be continuously and effectively detected to ensure good contact quality between the negative plate and the human body during the entire operation.
  • R1 and R2 are respectively equivalent contact resistance between two negative plates and a human body
  • impedance measuring circuit 1 and impedance measurement Circuit 2 measures the resistance of R1 and R2 respectively, converts the impedance signal into a standard sine wave analog signal, sends the operational amplifier and AD to perform amplification and AD conversion processing, and the processed digital signal is sent to the system controller (MCU) for calculation and corresponding System operation.
  • MCU system controller
  • the present disclosure detects the impedances of R1 and R2, respectively.
  • the total impedance of the negative plate and the human body is the arithmetic sum of R1 and R2.
  • the system can judge the overall contact quality of the negative plate and the human body according to the test result, such as the impedance range of 10-150 ⁇ , out of range. It can be determined that the negative electrode plate is in poor contact with the human body.
  • the total impedance is within a reasonable impedance range.
  • This invention detects the two impedances separately, and by comparing the test results, it is easy to identify the case where the negative plate is asymmetrically pasted.
  • PIN1 and PIN2 are respectively two negative electrode plate leads, which are also high frequency energy main circuits, and the impedance between PIN1 and PIN2 is negative plate 1 and negative plate 2
  • PIN3 is the lead wire of the negative plate 3
  • the negative plate 3 is located at the center of the negative plate 1 and the negative plate 2
  • the negative plate 3 itself does not flow the main power current, combined
  • the negative electrode plate 1 and the negative electrode plate 2 were used to test the tissue impedance between the negative electrode plate 1 and the negative electrode plate 3, and between the negative electrode plate 2 and the negative electrode plate 3, respectively.
  • FIG. 5 is the impedance measurement circuit diagram
  • R1 is the equivalent impedance of the negative plate
  • the parallel inductance circuit is composed of C1 and T1 primary inductance
  • V1 is the excitation source of the transformer secondary LCR circuit
  • C2 and R2 form the LCR series circuit, generally 50-100kHz.
  • the resonant frequency of the circuit is equal, ensuring that the primary voltage of the transformer T1 reaches a maximum value and is a standard sine wave, and at the same time improves the accuracy of the subsequent sampling circuit.
  • Different resistances correspond to different voltage values, that is, the voltage signal indicates the resistance of the resistor R1.
  • the resistance voltage signal is transmitted to the secondary sampling circuit through the transformer, and after the amplification and AD processing, the entire impedance detection process is completed.

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Abstract

La présente invention concerne un appareil et un procédé permettant de mesurer la qualité de contact d'une plaque négative (3) d'un dispositif de bistouri électrique à haute fréquence. L'appareil de mesure comprend : des premier et second circuits de mesure d'impédance (1, 2) destinés à mesurer, au moyen d'une excitation, des impédances de contact équivalentes (R1, R2) entre des première et seconde plaques négatives et un corps humain testé, à convertir des premier et second signaux d'impédance mesurés en premier et second signaux analogiques d'onde sinusoïdale standards et à entrer ces derniers dans des premier et second modules d'amplification opérationnelle/de conversion analogique-numérique (A-N) ; les premier et second modules d'amplification opérationnelle/de conversion analogique-numérique étant destinés à effectuer une amplification et un traitement de conversion analogique-numérique sur les signaux analogiques d'onde sinusoïdale standards entrés par les premier et second circuits de mesure d'impédance (1, 2) et à entrer des premier et second signaux numériques après traitement dans une unité de microcontrôleur de système (MCU pour System Microcontroller Unit) ; et l'unité de microcontrôleur de système (MCU) étant destinée à calculer les premier et second signaux numériques d'entrée et à obtenir la qualité de contact de la plaque négative (3) d'un dispositif de bistouri électrique à haute fréquence au moyen d'une analyse.
PCT/CN2017/115223 2017-12-08 2017-12-08 Appareil et procédé permettant de mesurer la qualité de contact d'une plaque négative de bistouri électrique à haute fréquence Ceased WO2019109334A1 (fr)

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PCT/CN2017/115223 WO2019109334A1 (fr) 2017-12-08 2017-12-08 Appareil et procédé permettant de mesurer la qualité de contact d'une plaque négative de bistouri électrique à haute fréquence

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PCT/CN2017/115223 WO2019109334A1 (fr) 2017-12-08 2017-12-08 Appareil et procédé permettant de mesurer la qualité de contact d'une plaque négative de bistouri électrique à haute fréquence

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022098578A1 (fr) * 2020-11-04 2022-05-12 Advanced Neuromodulation Systems, Inc. Système et procédé de détection d'application de plot de mise à la terre pour dispositifs d'ablation
CN115951126A (zh) * 2022-12-23 2023-04-11 南京首量医疗科技有限公司 一种高频电刀中性电极检测系统及方法

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US5087257A (en) * 1989-04-01 1992-02-11 Erbe Elektromedizin Gmbh Apparatus for monitoring the application of neutral electrodes on a patient undergoing high frequency electro-surgery
US20100036377A1 (en) * 2005-02-23 2010-02-11 Nessler Medizintechnik Gmbh Planar Electrode
CN102215768A (zh) * 2007-10-24 2011-10-12 塞隆医疗设备公司 高频手术设备以及用于高频手术设备的方法
CN203117291U (zh) * 2013-01-18 2013-08-07 重庆金山科技（集团）有限公司 高频电刀负极板阻抗测量装置
CN206587032U (zh) * 2015-11-13 2017-10-27 柯惠有限合伙公司 返回电极监测系统
CN107907744A (zh) * 2017-12-08 2018-04-13 赛诺微医疗科技（浙江）有限公司 高频电刀负极板接触质量的测量装置及方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5087257A (en) * 1989-04-01 1992-02-11 Erbe Elektromedizin Gmbh Apparatus for monitoring the application of neutral electrodes on a patient undergoing high frequency electro-surgery
US20100036377A1 (en) * 2005-02-23 2010-02-11 Nessler Medizintechnik Gmbh Planar Electrode
CN102215768A (zh) * 2007-10-24 2011-10-12 塞隆医疗设备公司 高频手术设备以及用于高频手术设备的方法
CN203117291U (zh) * 2013-01-18 2013-08-07 重庆金山科技（集团）有限公司 高频电刀负极板阻抗测量装置
CN206587032U (zh) * 2015-11-13 2017-10-27 柯惠有限合伙公司 返回电极监测系统
CN107907744A (zh) * 2017-12-08 2018-04-13 赛诺微医疗科技（浙江）有限公司 高频电刀负极板接触质量的测量装置及方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022098578A1 (fr) * 2020-11-04 2022-05-12 Advanced Neuromodulation Systems, Inc. Système et procédé de détection d'application de plot de mise à la terre pour dispositifs d'ablation
US11617619B2 (en) 2020-11-04 2023-04-04 Advanced Neuromodulation Systems, Inc. System and method for detecting application of grounding pad for ablation devices
CN115951126A (zh) * 2022-12-23 2023-04-11 南京首量医疗科技有限公司 一种高频电刀中性电极检测系统及方法

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