RU2008830C1 - Electrosurgical apparatus - Google Patents

Electrosurgical apparatus Download PDF

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RU2008830C1
RU2008830C1 SU4850471A RU2008830C1 RU 2008830 C1 RU2008830 C1 RU 2008830C1 SU 4850471 A SU4850471 A SU 4850471A RU 2008830 C1 RU2008830 C1 RU 2008830C1
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Константин Алексеевич Додонов
Дмитрий Васильевич Белик
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Константин Алексеевич Додонов
Дмитрий Васильевич Белик
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FIELD: medical engineering. SUBSTANCE: apparatus has control circuit 1, power supply 2, generator 3, connected in series. Electrode 4 is connected to the first output of generator 3 directly, electrode 5 is connected to the second output of generator 3 through current transducer 6. Voltage transducer 7 has inputs connected with electrodes 4 and 5. Calculator 8 is connected with outputs of current transducer 6 and voltage detector 7 by its inputs. Digital-to-analog converter 9 has input connected with output of calculator 8. Register 10 has input connected with output of analog-to-digital converter 9. Permanent storage 11 has input connected with output of register 10. Digital- to-analog converter 12 has input connected with output of permanent storage 11. Amplifier 13 has input connected with output of digital-to-analog converter 12, output of amplifier 13 is connected with additional input of control circuit 1. Multivibrator 14 has input connected with control input of analog-to-digital converter 9. Inverter 15 has input connected with output of multivibrator 14, output of the inverter is connected with control input of register 10. Setting signal source 16 is connected with basic input of control circuit 1. EFFECT: optimized process of tissue destruction; improved speed of operation; little loss of blood. 1 dwg

Description

Изобретение относится к медицинской технике и может быть использовано для деструкции мягких тканей при проведении хирургических операций. The invention relates to medical engineering and can be used for destruction of soft tissues during surgical operations.

Известный электрохирургический аппарат содержит последовательно соединенные между собой первую схему управления, источник питания, генератор, два электрода, подсоединенные через датчики тока к выходам генератора, вычислитель, подсоединенный своими соответствующими входами к выходам датчиков тока, вторую схему управления, подсоединенную своим первым выходом к второму входу генератора и вторым выходом к третьему входу вычислителя, схему сравнения, подсоединенную своим первым входом к выходу вычислителя и выходом к первой схеме управл Known electrosurgical apparatus includes a serially coupled between a first control circuit, a power source, a generator, two electrodes are connected through the current sensors to the generator output, calculator, connected by their respective inputs to the outputs of the current sensors, the second control circuit coupled to its first output to the second input generator and the second output to the third input of the calculator, a comparison circuit, coupled to its first input to the output of the calculator and to output the first control circuit ения, и задатчик входного сигнала, подсоединенный своим выходом к второму входу схемы сравнения. eniya and the setpoint input signal, its output connected to the second input of the comparison circuit.

Общими признаками предлагаемого электрохирургического аппарата и аналога является последовательно соединенная схема управления, источник питания, генератор, электроды, один из которых подсоединен через датчик тока к выходу генератора, источник сигнала задания и вычислитель, подсоединенный своим входом к датчику тока. Common features of the proposed apparatus and electrosurgical analogue is series connected control circuit, a power source, a generator, the electrodes, one of which is connected through a current generator to the output of the sensor, the reference signal source and a computer connected with its input to a current sensor.

Недостатком аналога является отсутствие возможности оптимизации процесса деструкции мягких тканей, а также высокая сложность за счет наличия второй схемы управления и необходимость формирования измерительного импульса, по результатам изменения которого, после прохождения через мягкие ткани, производится корректировка уровня выходной мощности с целью предотвращения превышения предельного уровня. A disadvantage of the analogue is the inability to optimize the process of destruction of soft tissues, and high complexity due to the presence of the second control circuit and the need to form metering pulse, based on which changes after passing through the soft tissue, is made the output power level adjustment in order to prevent exceeding the maximum level.

Известен также электрохирургический аппарат (см. заявку Великобритании N 2164473), взятый в качестве прототипа. Also known electrosurgical device (see. N application UK 2164473), taken as a prototype. Этот электрохирургический аппарат содержит последовательно соединенные между собой схему управления, источник питания, генератор, электроды, один из которых непосредственно, а другой - через датчик тока, подсоединены к выходам генератора, датчик напряжения, подсоединенный своими входами к электродам, вычислитель, подсоединенный своими соответствующими входами к выходам датчика тока и датчика напряжения, схема сравнения, подсоединенная своим первым входом к выходу вычислителя и выходом к схеме управления, и источник сигнала задания, по This Electrosurgical apparatus comprising serially connected between a driving circuit, power source, a generator, the electrodes of which one is directly and the other - through a current sensor connected to the alternator output, a voltage sensor, connected by their inputs to the electrodes, a calculator connected by their respective inputs to the outputs of current sensor and the voltage sensor, the comparison circuit connected to its first input to the output of the calculator and the output to the control circuit, and the reference signal source, for дсоединенный своим выходом к второму входу схемы управления. dsoedinenny output to the second input of the control circuit.

Эти же признаки являются общими за исключением схемы сравнения с присущими ей связями. These features are common except the comparison circuit with its attendant constraints.

Недостатком прототипа является невозможность оптимизации процесса деструкции мягких тканей во всем диапазоне изменений импеданса ткани, так как поддержание постоянной выходной мощности позволяет оптимизировать процесс деструкции лишь на ограниченном интервале изменений импеданса ткани. A disadvantage of prior art is the inability to optimize the process of soft tissue destruction in the entire range of tissue impedance changes, since maintenance of a constant output power to optimize the degradation process only a limited range of tissue impedance changes.

Поэтому задача создания несложных электрохирургических аппаратов, имеющих возможность оптимизации процесса деструкции во всем диапазоне изменений структуры мягких тканей, является актуальной на сегодняшний день. Therefore, the task of creating a simple electrosurgical devices with the ability to optimize the degradation process in the whole range of soft-tissue structures is relevant today.

Целью изобретения является оптимизация процесса деструкции ткани во всем диапазоне изменений импеданса. The aim of the invention is to optimize the process of tissue destruction in the entire range of the impedance changes.

Поставленная цель достигается тем, что в электрохирургический аппарат, содержащий последовательно соединенные между собой схему управления, источник питания и генератор, первый электрод, соединенный с выходом генератора, второй электрод, соединенный с генератором через датчик тока, датчик напряжения параллельно подключенный входами к электродам, вычислитель, соединенный входами с выходом датчика тока и с выходом датчика напряжения, и источник сигнала задания, соединенный выходом с основным входом схемы управления, введены соединенны The goal is achieved in that the electrosurgical apparatus comprising serially connected between a driving circuit power supply and the generator, the first electrode connected to the oscillator output, a second electrode coupled to the generator via a current sensor, a voltage sensor connected in parallel inputs to the electrodes, the calculator coupled with the input and output of the current sensor with the output of the voltage sensor, and the reference signal source coupled to the main output of the input control circuit administered compound между собой аналого-цифровой преобразователь, регистр, постоянное запоминающее устройство, цифроаналоговый преобразователь и усилитель, вход которого соединен с дополнительным входом схемы управления, а также инвертор, выход которого соединен с вторым входом регистра, и мультивибратор, выходы которого подключены к входу инвертора и входу аналого-цифрового преобразователя, второй вход которого соединен с выходом вычислителя. between an analog-to-digital converter, a register, a read only memory, digital to analog converter and an amplifier having an input connected to an additional input of the control circuit, and an inverter whose output is coupled to a second register input and a multivibrator, the outputs of which are connected to the inverter input and entry analog-to-digital converter, a second input coupled to an output of the calculator.

Введение соединенных между собой аналого-цифрового преобразователя, регистра, постоянного запоминающего устройства, цифроаналогового преобразователя и усилителя, вход которого соединен с дополнительным входом схемы управления, а также инвертора, выход которого соединен с вторым входом регистра, и мультивибратора, выходы которого подключены к входу инвертора и входу аналого-цифрового преобразователя, второй вход которого соединен с выходом вычислителя, позволяет, используя выходной сигнал вычислителя, равный отношению амплитуд выхо Introduction of interconnected analog-to-digital converter, a register, a read only memory, digital to analog converter and an amplifier having an input connected to an additional input of the control circuit, and the inverter output is connected to the second register input and a multivibrator, the outputs of which are connected to the input of inverter and input analog-digital converter, a second input coupled to an output of the calculator allows using the output signal of the calculator, which is the ratio of the amplitudes vyho ных сигналов датчика напряжения к датчику тока, а следовательно пропорциональный импедансу ткани, находящейся между электродами, преобразованный в адрес ячейки постоянного запоминающего устройства в которую ранее помещена информация, являющаяся фрагментом дискретной апроксимации функциональной зависимости, отражающей изменение оптимального уровня выходной мощности, приложенной к электродам от импеданса участка ткани между ними во всем диапазоне его изменений, что позволяет в свою очередь сформировать сигнал, амплитуда которого, с GOVERNMENTAL voltage sensor signals to the current sensor, and thus proportional to the impedance of tissue located between the electrodes is transformed into a permanent memory cell address which previously contains information which is a fragment of a discrete approximation of the functional dependence of reflecting the change in the optimum output power level applied to the electrodes by the impedance tissue portion therebetween throughout the range of its changes, which allows, in turn, generate a signal whose amplitude, with учетом коэффициента пропорциональности, вводимого источником сигнала задания, определяет величину напряжения вырабатываемого источником питания и однозначно определяет уровень выходной мощности, выдаваемой с генератора на электроды, и, следовательно, обеспечить уровень выходной мощности, соответствующий оптимальному процессу деструкции ткани во всем диапазоне изменений импеданса. of proportionality coefficient input source of the reference signal, determines the magnitude of the voltage generated by the power source and unambiguously determines the level of output power delivered from the generator to the electrodes, and hence provide an output power level corresponding to the optimum process of tissue destruction in the entire range of the impedance changes.

Таким образом, введение узла памяти, хранящего ранее помещенную в него информацию, позволяет осуществить оптимизацию процесса деструкции ткани во всем диапазоне изменений импеданса ткани. Thus, the introduction memory unit that stores previously placed therein information allows for optimization of the process of tissue destruction in the entire range of tissue impedance changes.

На чертеже представлена функциональная схема электрохирургического аппарата. The drawing shows a functional diagram of an electrosurgical apparatus.

Устройство электрохирургического аппарата содержит последовательно соединенные между собой схему управления 1, источник питания 2, генератор 3, электрод 4, подсоединенный к первому выходу генератора 3 непосредственно, а электрод 5 подсоединен к второму выходу генератора 3 через датчик тока 6, датчик напряжения 7, подсоединенный своими входами к электродам 4 и 5, вычислитель 8, подсоединенный своими соответствующими входами к выходам датчика тока 6 и датчика напряжения 7, аналого-цифровой преобразователь 9, подсоединенный своим входом к выходу Electrosurgery apparatus device comprises serially connected between a control circuit 1, power source 2, a generator 3, an electrode 4 connected to a first output of generator 3 itself, and the electrode 5 is connected to the second output of the generator 3 through the current detector 6, a voltage sensor 7 connected by their inputs to the electrodes 4 and 5, the calculator 8, their respective inputs coupled to the outputs of the current sensor 6 and the voltage sensor 7, an analog-to-digital converter 9 is coupled with its input to the output ычислителя 8, регистр 10, подсоединенный входом к выходу аналого-цифрового преобразователя 9, постоянное запоминающее устройство 11, подсоединенное входом к выходу регистра 10, цифроаналоговый преобразователь 12, подсоединенный входом к выходу постоянного запоминающего устройства 11, усилитель 13, подсоединенный входом к выходу цифроаналогового преобразователя 12, а выходом - к дополнительному входу схемы управления 1, мультивибратор 14, подсоединенный своим выходом к управляющему входу аналого-цифрового преобразователя 9, инвертор 15, подсоеди ychislitelya 8, a register 10 connected input to the output of analog-to-digital converter 9, a read only memory 11 coupled input to the output register 10, digital to analog converter 12 coupled input to the output of the ROM memory 11, an amplifier 13 connected the input to the output of the digital to analog converter 12, and the output - to an additional input of the control circuit 1, the multivibrator 14, its output connected to the control input of analog-to-digital converter 9, an inverter 15, CONNECTION ненный своим входом к выходу мультивибратора 14, а выходом - к управляющему входу регистра 10, источник сигнала задания 16, подсоединенный к основному входу управления 1. nenny its input to the output of multivibrator 14 and the output - to the control input of the register 10, the reference signal source 16 coupled to the main control input 1.

Электрохирургический аппарат работает следующим образом. Electrosurgical apparatus operates as follows. С датчика тока 6 на соответствующий вход вычислителя 8 поступает сигнал постоянного тока, величина напряжения которого пропорциональна амплитуде переменного тока в цепи между выходом генератора 3 и электродом 5. С датчика напряжения 7 на соответствующий вход вычислителя 8 поступает сигнал постоянного тока, величина напряжения которого пропорциональна амплитуде переменного напряжения между электродами 4 и 5. Вычислитель 8 производит деление сигнала датчика напряжения 7 на сигнал датчика тока 6, определяя импеданс ткани находящейся между эл With the current sensor 6 to a corresponding input of the calculator 8 receives a DC signal, the voltage value which is proportional to the amplitude of the alternating current in the circuit between the output of generator 3 and the electrode 5. Since the voltage sensor 7 to a corresponding input of the calculator 8 receives a DC signal whose voltage is proportional to the amplitude AC voltage between the electrodes 4 and 5. The calculator 8 performs division on the sensor signal voltage sensor 7, the current 6, determining tissue impedance comprised between e ектродами 4 и 5 и выводит его в виде напряжения постоянного тока. ektrodami 4 and 5, and outputs it as a DC voltage. Это напряжение преобразуется аналого-цифровым преобразователем 9 в двоичное число с периодичностью определяемой частотой мультивибратора 14. Затем это число поступает на вход регистра 10 и записывается в него управляющим сигналом с инвертора 15, для обеспечения непрерывности информации на адресном входе постоянного запоминающего устройства 11. В постоянном запоминающем устройстве 11 в виде двоичных чисел хранятся коэффициенты оптимизации процесса деструкции мягких тканей. This voltage is converted to analog-to-digital converter 9 into a binary number with a periodicity determined by the frequency of the multivibrator 14. This is then fed to the input register 10 and writes it into a control signal from the inverter 15, to ensure continuity of data on the address input of the ROM memory 11. The constant memory 11 as binary numbers stored coefficients of the optimization process of destruction of soft tissues. В соответствии с кодом числа, поступающего на адресный вход постоянного запоминающего устройства 11, на его вход выводится соответствующий двоичный код коэффициента оптимизации, поступающий далее на вход цифроаналогового преобразователя 12 и затем через усилитель 13 в виде аналогового сигнала - на вход схемы управления 1. Схема управления 1 преобразует этот сигнал, с учетом коэффициента пропорциональности определяемого источником сигнала задания 16, в широтно модулированные импульсы и выводит их в качестве выходного сигнала. In accordance with the number of code input to the address input of the ROM memory 11, to its input corresponding output binary code optimization factor entering the inputs of the digital to analog converter 12 and then through the amplifier 13 to an analog signal - the input of the control circuit 1. The control circuit 1 converts the signal, taking into account the coefficient of proportionality determined by the reference signal source 16, a pulse width modulated pulses and outputs them as the output signal.

Источник питания 2, воспринимая широтно модулированные импульсы, устанавливает на своем выходе напряжение постоянного тока, величина которого находится в определенной зависимости от коэффициента оптимизации, поступающего с постоянного запоминающего устройства 11, и коэффициента пропорциональности, определяемого состоянием источника сигнала задания 16. Генератор 3 работает в ключевом режиме и его выходная мощность, поступающая на электроды 4 и 5, однозначно определяется величиной питающего напряжения, поступающего с источника питания 2. The power supply 2, sensing pulse modulated pulses, sets at its output a DC voltage whose magnitude is determined in dependence on the optimization coefficient supplied from the ROM memory 11 and a coefficient of proportionality determined by the state of the reference signal source 16. The generator 3 operates in the key mode and its output power coming to the electrodes 4 and 5, it is uniquely determined by the value of supply voltage supplied from the power source 2.

Таким образом, уровень выходной мощности на электродах 4 и 5 находится в соответствии с импедансом участка ткани, находящейся между электродами и коэффициентом пропорциональности, определяемом источником сигнала задания 16, а если в постоянном запоминающем устройстве 11 находится информация, содержащая дискретную аппроксимацию функциональной зависимости уровня выходной мощности от импеданса ткани, являющейся оптимальной с точки зрения степени деструкции, то процесс воздействия на ткань будет проходить с большой скоростью, минимальной Thus, the output level at the electrodes 4 and 5 is in accordance with the impedance of the tissue located between the electrodes and the coefficient of proportionality determined by the reference signal source 16, and if the read only memory 11 contains information comprising discrete approximation function of the output power level the tissue impedance, which is optimal from the point of view of the degree of degradation, the process impacts on the fabric will be held at a high speed, minimum кровопотерей и с оптимальной степенью деструкции. blood loss and with an optimal degree of degradation.

(56) Заявка ФРГ N 3626698, кл. (56) German Application N 3,626,698, cl. А 61 В 17/36, 1983. A 61 B 17/36, 1983.

Патент Великобритании N 2164473, кл. UK Patent N 2164473, cl. А 61 В 17/36, 1975. A 61 B 17/36, 1975.

Claims (1)

  1. ЭЛЕКТРОХИРУРГИЧЕСКИЙ АППАРАТ, содержащий последовательно соединенные между собой схему управления, источник питания и генератор, первый электрод, соединенный с выходом генератора, второй электрод, соединенный с генератором через датчик тока, датчик напряжения, параллельно подключенный входами к электродам, вычислитель, соединенный входами с выходом датчика тока и с выходом датчика напряжения, и источник сигнала задания, соединенный выходом с основным входом схемы управления, отличающийся тем, что, с целью оптимизации процесса деструк Electrosurgical apparatus comprising serially connected between a driving circuit power supply and the generator, the first electrode connected to the oscillator output, a second electrode coupled to the generator via a current sensor, voltage sensor, connected in parallel inputs to the electrodes, the calculator coupled inputs a sensor output current and voltage output of the sensor, and the reference signal source coupled to the main output of the input control circuit, characterized in that, in order to optimize the process destruk ии ткани во всем диапазоне изменений импеданса, в него введены соединенные между собой аналого-цифровой преобразователь, регистр, постоянное запоминающее устройство, цифроаналоговый преобразователь и усилитель, выход которого соединен с дополнительным входом схемы управления, а также инвертор, выход которого соединен с вторым входом регистра, и мультивибратор, выходы которого подключены к входу инвертора и входу аналого-цифрового преобразователя, второй вход которого соединен с выходом вычислителя. ii tissue throughout the range of impedance changes therein introduced interconnected analog-digital converter, a register, a read only memory, digital to analog converter and an amplifier, whose output is connected to an additional input of the control circuit, and an inverter whose output is coupled to a second register input and a multivibrator, the outputs of which are connected to the input of inverter and input of analog-to-digital converter, a second input coupled to an output of the calculator.
SU4850471 1990-07-13 1990-07-13 Electrosurgical apparatus RU2008830C1 (en)

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