ES2327005T3 - Sistema para la vigilancia en circuito cerrado de un aparato electroquirurgico monopolar. - Google Patents
Sistema para la vigilancia en circuito cerrado de un aparato electroquirurgico monopolar. Download PDFInfo
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Abstract
Un sistema (50) de control en circuito cerrado para controlar al menos una forma de onda para coagulación electroquirúrgica, cuyo sistema de control en circuito cerrado incluye: un controlador de ganancia (34); un perceptor (32) configurado para percibir al menos una de entre una propiedad de tejido y una propiedad de energía, y para transmitir dicha al menos una de entre la propiedad del tejido y la propiedad de la energía, al controlador de ganancia (34) como señal de perceptor con una amplitud; un microprocesador (22) configurado para ser acoplado a un generador electroquirúrgico y configurado para ajustar dicha al menos una forma de onda para coagulación electroquirúrgica en función de la señal de perceptor; caracterizado porque: el controlador de ganancia está configurado para tratar la señal de preceptor a fin de reducir la amplitud de la señal de perceptor y obtener una relación entre señal y ruido de la señal de perceptor comprendida dentro de un intervalo predeterminado; en el que la señal de perceptor es una señal de perceptor de voltaje y el controlador de ganancia es un controlador de ganancia de voltaje que incluye: un control (35) de cambio de escala del voltaje de perceptor configurado para cambiar de escala la amplitud de la señal de perceptor de voltaje y para generar una señal de perceptor cambiada de escala; un control de ganancia (37) configurado para tratar una señal variable de control del valor de corriente continua para generar una señal de control de ganancia; y un multiplicador (36) acoplado al control de cambio de escala del voltaje del perceptor y al control de ganancia, estando configurado el multiplicador para multiplicar, en tiempo real, la señal de perceptor cambiada de escala y la señal de control de ganancia a fin de normalizar la señal de perceptor de voltaje con independencia de su amplitud.
Description
Sistema para la vigilancia en circuito cerrado
de un aparato electroquirúrgico monopolar.
Esta solicitud reivindica la prioridad de la
solicitud provisional norteamericana núm. 60/761.440, titulada
"Sistema y método para la vigilancia en circuito cerrado de un
aparato electroquirúrgico monopolar", presentada por Robert Wham
y otros el 24 de Enero de 2006.
La presente exposición se refiere, en general, a
un método y un sistema electroquirúrgico, más específicamente, a un
sistema para la vigilancia en circuito cerrado de un aparato
electroquirúrgico monopolar para percibir las propiedades de
energía y del tejido y controlar la entrega de energía basándose en
las propiedades percibidas.
La electrocirugía supone la aplicación de
elevadas corrientes eléctricas de radiofrecuencia a un sitio
quirúrgico para cortar, destruir o coagular tejido. En la
electrocirugía monopolar, un electrodo fuente o activo entrega
energía de radiofrecuencia desde el generador electroquirúrgico al
tejido y un electrodo de retorno transmite la corriente de vuelta
al generador. En la electrocirugía monopolar, el electrodo fuente
es, típicamente, parte del instrumento quirúrgico sostenido por el
cirujano y que se aplica al tejido a tratar. Un electrodo de
retorno del paciente está situado alejado del electrodo activo, para
transmitir la corriente de vuelta al generador.
En la electrocirugía bipolar, uno de los
electrodos del instrumento manejado funciona como electrodo activo
y el otro como electrodo de retorno. El electrodo de retorno está
situado muy cerca del electrodo activo (alimentación de corriente),
de tal manera que se forme un circuito eléctrico entre ambos
electrodos. Comúnmente, los electrodos, en los sistemas de
electrocirugía bipolar, están dispuestos dentro de fórceps
electroquirúrgicos que, de por sí, se prestan particularmente bien
para cerrar vasos. De esta forma, la corriente eléctrica aplicada es
limitada al tejido corporal situado entre los electrodos. Cuando
los electrodos son separados lo suficiente uno de otro, se abre el
circuito eléctrico y, así, el contacto inadvertido de tejido
corporal con cualquiera de los electrodos separados, no hace que
circule corriente.
Los generadores electroquirúrgicos son capaces
de producir una diversidad de formas de ondas eléctricas.
Determinadas formas de onda son más adecuadas para procedimientos
electroquirúrgicos específicos. Una forma de onda continua con un
ciclo de trabajo del 100% es más adecuada para cortar tejido, ya que
la energía genera calor muy rápidamente, vaporizándose por tanto el
tejido. Una forma de onda intermitente, cuyo ciclo de trabajo sea
de, aproximadamente, un 10%, es más adecuada para coagular el
tejido, ya que la cantidad de calor generado es reducida.
Los parámetros que, corrientemente, afectan a la
forma de onda de coagulación, los regula manualmente el cirujano.
Este proceso de ajuste es complicado, ya que puede que sea necesario
ajustar continuamente la forma de onda de coagulación durante su
entrega. Sin embargo, no se dispone de sistemas que puedan ajustar
automáticamente la forma de onda de coagulación.
El documento US 5.370.645 describe un procesador
electroquirúrgico citado como relevante para el presente invento
durante el proceso de concesión de esta patente.
La presente exposición proporciona un sistema
electroquirúrgico dotado de vigilancia en circuito cerrado. El
sistema incluye un generador electroquirúrgico que tiene una etapa
de salida de RF para generar formas de onda electroquirúrgicas
adecuadas para conseguir coagulación, y un microprocesador para
controlar la etapa de salida de RF. La vigilancia en circuito
cerrado incluye un perceptor para percibir una o más propiedades
del tejido, tales como voltaje, intensidad, temperatura. El
perceptor transmite datos relativos a las propiedades del tejido al
microprocesador, el cual ajusta la salida del generador. Más
específicamente, el generador ajusta las formas de onda
electroquirúrgicas en respuesta a los datos para corresponder con
parámetros de forma de onda predeterminados.
También se describe un sistema electroquirúrgico
configurado para proporcionar un control automático en circuito
cerrado de la energía de RF en respuesta directa a cambios
detectados en el tejido hasta que se consiga un efecto clínico
deseado de hemostasis. El sistema incluye un generador que tiene una
fuente de alimentación de alto voltaje y alta velocidad
("HVPS") para alimentar una salida de corriente continua
("DC"). La HVPS está configurada para ajustar la salida de
corriente continua de forma rápida y dinámica. El generador incluye
una etapa de salida de RF que está configurada para generar energía
de radio frecuencia ("RF"), que comprende una o más formas de
onda para coagulación electroquirúrgica, adecuadas para coagular
tejido. El sistema también incluye un perceptor de RF para percibir
propiedades de la energía de RF y generar una señal de RF indicativa
de la energía de RF. Los regímenes de muestreo para percepción son
suficientes para permitir que el generador modele las formas de
onda para coagulación electroquirúrgica en tiempo real en función de
la señal del perceptor de RF con el fin hacer casar las formas de
onda para la etapa de RF. El sistema incluye, además, un sistema de
control en circuito cerrado que controla la forma de onda para
coagulación electroquirúrgica. Además, el sistema incluye uno o más
controladores de ganancia configurados para amplificar la señal del
perceptor de RF a fin de mantener una relación predeterminada entre
señal y ruido y para proporcionar corrección de voltaje y de
intensidad de RF de la señal del perceptor de RF que, luego, es
transmitida al controlador para permitir la modificación, en tiempo
real, de la energía de RF.
De acuerdo con un aspecto del presente invento,
se proporciona un sistema electroquirúrgico de acuerdo con la
reivindicación 8, que incluye un generador configurado para generar
formas de onda para coagulación electroquirúrgica. El generador
incluye un sistema de control en circuito cerrado que controla las
formas de onda para coagulación electroquirúrgica. El sistema de
control en circuito cerrado incluye un perceptor configurado para
percibir una propiedad de un tejido o una propiedad de la energía y
para transmitir la propiedad del tejido o la propiedad de la
energía como una o más señales de perceptor que tienen una amplitud.
El sistema de control incluye, también, un controlador de ganancia
configurado para tratar las señales de perceptor a fin de reducir su
amplitud y obtener una relación entre señal y ruido de las señales
del perceptor comprendida dentro de un intervalo predeterminado. El
microprocesador está acoplado al generador y está configurado para
ajustar las formas de onda para coagulación electroquirúrgica en
función de las señales de perceptor.
De acuerdo con otro aspecto del presente
invento, se proporciona un sistema de control en circuito cerrado
para controlar formas de onda para coagulación electroquirúrgica de
acuerdo con las reivindicaciones 1 y 2. El sistema de control en
circuito cerrado incluye un perceptor configurado para percibir una
propiedad de un tejido o una propiedad de la energía y para
transmitir la propiedad del tejido y la propiedad de la energía
como una o más señales de perceptor que tienen una amplitud. Este
sistema de control también incluye un controlador de ganancia
configurado para tratar las señales de perceptor a fin de reducir su
amplitud y obtener una relación entre señal y ruido de las señales
de perceptor comprendida dentro de un intervalo predeterminado. El
microprocesador está acoplado al generador y está configurado para
ajustar las formas de onda para coagulación electroquirúrgica en
función de las señales de perceptor.
En la presente exposición también se contempla
un método para controlar formas de onda para coagulación
electroquirúrgica. El método incluye los pasos de percibir una
propiedad de un tejido o una propiedad de la energía y transmitir
la propiedad del tejido o una propiedad de la energía como señales
de perceptor que tienen una amplitud, y tratar las señales de
perceptor para reducir su amplitud y obtener una relación entre
señal y ruido de las señales de perceptor comprendida dentro de un
intervalo predeterminado. El método también incluye el paso de
ajustar las formas de onda para coagulación electroquirúrgica en
función de las señales del perceptor.
Los anteriores y otros aspectos, características
y ventajas del presente invento resultarán más evidentes a la luz
de la siguiente descripción detallada cuando se toma en conjunto con
los dibujos anejos, en los que:
la fig. 1 es un diagrama de bloques esquemático
de un sistema electroquirúrgico;
la fig. 2 es un diagrama de bloques esquemático
de un generador de acuerdo con la presente exposición; y
las figs. 3A-B son diagramas de
bloques esquemáticos del control de coagulación en circuito cerrado
de acuerdo con el presente invento.
En lo que sigue se describirán realizaciones
particulares del presente invento con referencia a los dibujos
anejos. En la descripción que sigue, no se describen con detalle
funciones ni construcciones bien conocidas a fin de evitar
complicar la presente exposición con detalles innecesarios.
El presente invento proporciona un sistema
electroquirúrgico con vigilancia de precisión en circuito cerrado
de propiedades de tejido y de energía. El sistema incluye un
generador que está configurado como fuente de alimentación de
energía de radiofrecuencia (RF) de alta velocidad. El circuito de
control incluye una pluralidad de perceptores para percibir
propiedades de tejido y de energía y un control de ganancia para
modificar la salida del generador. Los perceptores vigilan las
propiedades del tejido en tiempo real para permitir que un
controlador incorporado proporcione el ajuste correctivo de la
energía de RF entregada. El circuito cerrado de control corrige
automáticamente la energía de RF aplicada, basándose en propiedades
del tejido y de la energía, de acuerdo con un algoritmo prescrito,
determinado por el procedimiento clínico. El generador recibe el
ajuste correctivo del controlador y modifica dinámicamente la
energía
entregada en respuesta directa a cambios de las propiedades del tejido, hasta que se consigue un efecto clínico deseado.
entregada en respuesta directa a cambios de las propiedades del tejido, hasta que se consigue un efecto clínico deseado.
La fig. 1 es una ilustración esquemática de un
sistema electroquirúrgico 1 configurado para un procedimiento
monopolar. El sistema 1 incluye un electrodo activo 14 y un
electrodo de retorno 16 para tratar un tejido de un paciente P. Se
alimenta energía de RF electroquirúrgica al electrodo activo 14
mediante un generador 10 a través de un cable 18, permitiendo que
el electrodo activo 14 destruya, corte o coagule el tejido. El
electrodo de retorno 16 se dispone en el paciente P para devolver la
energía desde el paciente P al generador 10 a través de un cable
19.
El generador 10 incluye controles de entrada
(por ejemplo, pulsadores, activadores, interruptores, etc.) para
controlar el generador 10. Los controles le permiten al cirujano
regular la potencia de la energía de RF, la forma de onda y otros
parámetros, a fin de conseguir la forma de onda deseada, adecuada
para una tarea particular (por ejemplo, cortar, coagular, etc.).
Dispuesta entre el generador 10 y el electrodo activo 14 en el
cable 18, hay una pieza de mango 21, que incluye una pluralidad de
controles de entrada que pueden ser redundantes con ciertos
controles de entrada del generador 10. El colocar los controles de
entrada en la pieza de mango 12 permite conseguir una modificación
más fácil y rápida de los parámetros de energía de RF durante el
procedimiento quirúrgico, sin volver al generador 10. También se
contempla que un interruptor de pie pueda estar conectado al
generador 10 para controlar la entrega de energía durante
procedimientos monopolares. Se contempla, además, que la pieza de
mango 12 y el electrodo 14 puedan incorporarse en un único
instrumento, por ejemplo un lápiz quirúrgico, estando dispuesto el
electrodo 14 en el extremo distal de la pieza de mango 12.
La fig. 2 muestra un diagrama esquemático de
bloques del generador 10 que tiene un microprocesador 22, una
fuente de alimentación de corriente continua de alto voltaje
("HVPS") 28, una etapa 30 de salida de RF, al menos un
perceptor 32 de RF configurado para medir una o más propiedades de
tejido y/o de energía, y un controlador de ganancia 34. El
microprocesador 22 incluye un controlador 26 y un puerto de salida
que está conectado eléctricamente a la HVPS 28 configurada para
alimentar un voltaje de corriente continua, desde aproximadamente 0
V a aproximadamente 2000 V a la etapa 30 de salida de RF. El
microprocesador 22 recibe señales de entrada procedentes del
generador 10, la pieza de mango 12 o el interruptor de pie y el
controlador 26 y, a su vez, ajusta los parámetros de salida del
generador 10, más específicamente la HVPS 28 y/o realiza otras
funciones de control sobre ella. También se contempla que el
controlador 26 esté configurado para recibir señales de control
procedentes del controlador de ganancia 34 para regular
dinámicamente la energía de RF que está siendo entregada al
tejido.
La etapa 30 de salida de RF convierte la
potencia de corriente continua en energía de RF y entrega la energía
de RF, a unos 470 kHz, al electrodo activo 14 o a otros
dispositivos electroquirúrgicos conectados al generador 10. Además,
la etapa 30 de salida de RF recibe, también, energía de RF
procedente del electrodo de retorno 16. El perceptor 32 de RF está
conectado a la entrada y a la salida (por ejemplo, las conexiones al
electrodo activo 14 y al electrodo de retorno 16) de la etapa 30 de
salida de RF para percibir propiedades del tejido y de la energía
(por ejemplo, impedancia, voltaje, intensidad, temperatura, fase,
picos de voltaje, factor de cresta, picos de intensidad, potencia
real y reactiva, cambio del régimen de voltaje con el tiempo
[dv/dt], cambio del régimen de fase con el tiempo [d\phi/dt],
cambio del régimen de intensidad con el tiempo [dI/dt], cambio del
régimen de temperatura con el tiempo [dT/dt], cambio del régimen de
impedancia con el tiempo [dz/dt], armónicos de orden superior de la
forma de onda fundamental de 472 kHz,
etc.).
etc.).
El generador 10 incluye un sistema 50 de control
en circuito cerrado que tiene el microprocesador 22, el controlador
26, el perceptor 32 de RF y el controlador de ganancia 34 junto con
componente de los mismos mostrados en las figs.
3A-B y descritos con mayor detalle en lo que sigue.
El perceptor 32 de RF transmite señales que representan propiedades
del tejido y/o de la energía a través del control de ganancia 34
para ajustar en consecuencia la salida de energía de RF. Las
propiedades percibidas son transmitidas al microprocesador 22 y al
controlador 26 para realizar cálculos con el fin de determinar los
ajustes que han de realizarse en la salida de energía de RF. El
microprocesador 22 compara la impedancia, el voltaje y otras
mediciones con valores deseados y envía a la etapa 30 de salida de
RF señales para llevar a cabo cualesquiera ajustes necesarios para
conseguir los valores deseados.
Además de la impedancia y el voltaje, el
microprocesador 22 también mide el voltaje en un pico de la forma
de onda (Vpk) y el voltaje eficaz (Vrms). Los cálculos de los
valores de pico y eficaz se ejecutan, también, utilizando el valor
de la intensidad (I). Para calcular los valores eficaces, los
regímenes de muestreo de las señales de voltaje y de intensidad
deben corresponder al tamaño de la memoria intermedia del perceptor
32. Más específicamente, el microprocesador 22 incluye una memoria
intermedia dimensionada de forma que contenga un número entero de
ciclos completos de la forma de onda a un régimen de muestreo
específico para evitar errores de modulación dentro de los valores
eficaces. Esto permite que el perceptor 32 prepare la adquisición de
datos para las diversas formas de onda asociadas con la energía RF
de coagulación.
El microprocesador 22 calcula el factor de
cresta (Vpk/Vrms o Ipk/Irms) y los valores de pico de V y de I en
tiempo real y controla la temporización de la forma de onda de
salida y la amplitud de RF en función de los mismos. Se contempla
que el cálculo en tiempo real del factor de cresta puede utilizarse
para ajustar la energía de RF o ajustar la forma de onda para
mantener un perfil de factor de cresta. Más específicamente, el
cálculo en tiempo real del factor de cresta permite que los modos de
coagulación se controlen regulando la salida de energía de RF para
mantener un factor de cresta predeterminado. El factor de cresta o
los valores de pico de V y de I pueden mantenerse constantes y
ajustar en consecuencia la temporización de la forma de onda de
salida y la amplitud de RF.
El controlador de ganancia 34 trata las señales
de voltaje y de intensidad percibidas, recibidas desde el perceptor
32 de RF. Más específicamente, el controlador de ganancia 34 reduce
las elevadas amplitudes de las señales de voltaje y de intensidad
de coagulación, lo que permite que las señales sean transmitidas al
microprocesador 22 para su tratamiento. El control de ganancia 34
proporciona tanto la amplificación como la atenuación de las
señales de voltaje y de intensidad para obtener buenas relaciones
entre señal y ruido, a fin de reducir al mínimo el error de
cuantización binario. La resolución y la precisión de la RF
percibida permiten controlar con exactitud la dosificación de
energía al paciente.
Con referencia a las figs. 3A-B,
en ellas se ilustra el proceso de control de ganancia mediante dos
realizaciones. La fig. 3A muestra el controlador de ganancia 34,
que incluye el control 35 de cambio de escala del voltaje del
perceptor de RF y un control de ganancia 37 conectado a un
multiplicador analógico 36 que, luego, se conecta a un filtro
anti-superposición 38. En esta realización, el
controlador de ganancia 34 ajusta el voltaje percibido de la
energía de RF. El control 35 de cambio de escala recibe señales de
RF (por ejemplo, señales representativas de la energía de RF que
está siendo emitida como salida por el generador 10) procedentes del
perceptor 32 de RF y cambia de escala dinámica y automáticamente la
señal de RF para ajustar los valores de amplitud elevada de las
señales de voltaje y de intensidad de RF para coagulación. El
control de ganancia 37 proporciona la modificación de ganancia en
tiempo real de la energía de RF tratando una señal variable de
control del valor de corriente continua recibida del controlador
26. El multiplicador analógico 36 lleva a cabo una multiplicación
en tiempo real de las entradas de señal recibidas desde las salidas
del control 35 de cambio de escala de voltaje y del control de
ganancia 37. El multiplicador analógico 36 normaliza las señales del
perceptor de RF independientes de los valores de elevada amplitud
de la salida 30 de RF para conseguir una precisión máxima de la
energía de RF entregada.
El filtro anti-superposición 38
bloquea la frecuencia fundamental de RF y los armónicos evitando que
contribuyan con errores al tratamiento de cálculo realizado por el
controlador 26. El filtro 38 trata la energía de RF para reducir
los componentes de ruido de RF e incrementar la precisión de la
energía de RF entregada al paciente. También se contempla que el
perceptor 32 de RF incluya, asimismo, un circuito de reducción de
amplitud (no mostrado) para proteger el extremo frontal del
multiplicador 44.
La fig. 3B muestra otra realización del
controlador de ganancia 34 que incluye un control 39 de cambio de
escala de intensidad del perceptor de RF. En esta realización, el
controlador de ganancia 34 ajusta la intensidad percibida de la
energía de RF. El control de ganancia 37 está conectado al
multiplicador analógico 36 y a componentes
anti-superposición, en forma similar a la
representada en la fig. 3A y descrita en lo que antecede. La salida
del filtro anti-superposición 38 es alimentada a la
línea de salida (por ejemplo, que lleva al controlador 26). En la
fig. 3B, la salida del multiplicador analógico 36 es puesta en
correspondencia en cuanto a intensidad 1:1 con la entrada de
intensidad del perceptor de RF recibida del perceptor de RF 32. El
sumador 40 trata las señales de diferencia entre el multiplicador
analógico 36 y la entrada de intensidad del perceptor de RF en
conjunto con un amplificador operacional ("OPamp") para crear
una señal de salida de RF normalizada, equivalente, independiente
de los valores de elevada amplitud de la etapa 30 de salida de RF.
El limitador de entrada 42 proporciona protección contra impulsos
para la entrada del amplificador operacional 44, a fin de
incrementar la fiabilidad del controlador de ganancia 34.
El generador 10 es capaz de realizar pequeños
ajustes en la forma de onda de RF de elevada resolución (por
ejemplo, 10 ns). Esto permite controlar el factor de cresta y las
salidas en pico, así como sintonizar las formas de onda de modo que
la frecuencia de salida pueda regularse para que coincida con la
frecuencia resonante de la etapa 30 de salida de RF. El generador
10 está configurado para modelar las curvas de salida hasta un
grado utilizando un método de interpolación lineal que permite
cualquier curva descrita dentro de un número predeterminado de
puntos (por ejemplo, 15), cuando las curvas representan intensidad,
potencia, voltaje, etc.
Las realizaciones descritas en la presente
exposición están destinadas a ser ilustrativas y no restrictivas y
no se pretende que representen todas las realizaciones del presente
invento. Pueden introducirse diversas modificaciones y variaciones
sin por ello apartarse del alcance del invento como queda
establecido en las siguientes reivindicaciones.
Claims (8)
-
\global\parskip0.950000\baselineskip
1. Un sistema (50) de control en circuito cerrado para controlar al menos una forma de onda para coagulación electroquirúrgica, cuyo sistema de control en circuito cerrado incluye:un controlador de ganancia (34);un perceptor (32) configurado para percibir al menos una de entre una propiedad de tejido y una propiedad de energía, y para transmitir dicha al menos una de entre la propiedad del tejido y la propiedad de la energía, al controlador de ganancia (34) como señal de perceptor con una amplitud;un microprocesador (22) configurado para ser acoplado a un generador electroquirúrgico y configurado para ajustar dicha al menos una forma de onda para coagulación electroquirúrgica en función de la señal de perceptor;caracterizado porque:el controlador de ganancia está configurado para tratar la señal de preceptor a fin de reducir la amplitud de la señal de perceptor y obtener una relación entre señal y ruido de la señal de perceptor comprendida dentro de un intervalo predeterminado;en el que la señal de perceptor es una señal de perceptor de voltaje y el controlador de ganancia es un controlador de ganancia de voltaje que incluye:un control (35) de cambio de escala del voltaje de perceptor configurado para cambiar de escala la amplitud de la señal de perceptor de voltaje y para generar una señal de perceptor cambiada de escala;un control de ganancia (37) configurado para tratar una señal variable de control del valor de corriente continua para generar una señal de control de ganancia; yun multiplicador (36) acoplado al control de cambio de escala del voltaje del perceptor y al control de ganancia, estando configurado el multiplicador para multiplicar, en tiempo real, la señal de perceptor cambiada de escala y la señal de control de ganancia a fin de normalizar la señal de perceptor de voltaje con independencia de su amplitud. - 2. Un sistema (50) de control en circuito cerrado para controlar al menos una forma de onda para coagulación electroquirúrgica, cuyo sistema de control en circuito cerrado incluye:un controlador de ganancia (34);un perceptor (32) configurado para percibir al menos una de entre una propiedad de tejido y una propiedad de energía, y para transmitir dicha al menos una de entre la propiedad del tejido y la propiedad de la energía, al controlador de ganancia (34) como señal de perceptor con una amplitud;un microprocesador (22) configurado para ser acoplado a un generador electroquirúrgico y configurado para ajustar dicha al menos una forma de onda para coagulación electroquirúrgica en función de la señal de perceptor;caracterizado porque:el controlador de ganancia está configurado para tratar la señal de preceptor a fin de reducir la amplitud de la señal de perceptor y obtener una relación entre señal y ruido de la señal de perceptor comprendida dentro de un intervalo predeterminado;en el que la señal de perceptor es una señal de perceptor de intensidad y el controlador de ganancia es un controlador de ganancia de intensidad que incluye:un control (39) de cambio de escala de la intensidad del perceptor configurado para cambiar de escala la amplitud de la señal de perceptor de intensidad y para generar una señal de perceptor cambiada de escala;un control de ganancia (37) configurado para tratar una señal variable de control del valor de corriente continua para generar una señal de control de ganancia; yun multiplicador (36) configurado para generar una señal multiplicada en función de la señal de control de ganancia;un sumador (40) configurado para generar una señal de diferencia en función de la señal multiplicada y la señal del perceptor de intensidad; yun amplificador operacional (44) configurado para amplificar la señal de diferencia a fin de normalizar la señal del perceptor de intensidad con independencia de su amplitud.
\global\parskip1.000000\baselineskip
- 3. Un sistema de control en circuito cerrado de acuerdo con la reivindicación 1, en el que el controlador de ganancia de voltaje incluye:un filtro anti-superposición (38) configurado para bloquear sustancialmente una radiofrecuencia fundamental.
- 4. Un sistema de control en circuito cerrado de acuerdo con la reivindicación 2, en el que el controlador de ganancia de intensidad incluye:un limitador de entrada (42) para proporcionar protección contra impulsos bruscos para el amplificador operacional.
- 5. Un sistema de control en circuito cerrado de acuerdo con la reivindicación 2 o la reivindicación 4, en el que el controlador de ganancia de intensidad incluye:un filtro anti-superposición (38) configurado para bloquear sustancialmente una radiofrecuencia fundamental.
- 6. Un sistema de control en circuito cerrado de acuerdo con una cualquiera de las reivindicaciones precedentes, en el que el microprocesador incluye una memoria intermedia dimensionada para almacenar un múltiplo entero de una frecuencia de repetición de la señal de perceptor.
- 7. Un sistema de control en circuito cerrado de acuerdo con una cualquiera de las reivindicaciones precedentes, en el que el microprocesador está configurado para calcular al menos uno de entre un valor eficaz, un valor de pico y un factor de cresta de la señal de perceptor y para regular dicha al menos una forma de onda para coagulación electroquirúrgica en función del mismo.
- 8. Un sistema electroquirúrgico, que comprende:un generador (10) configurado para generar al menos una forma de onda para coagulación electroquirúrgica, cuyo generador incluye el sistema de control en circuito cerrado de acuerdo con una cualquiera de las reivindicaciones precedentes para controlar dicha al menos una forma de onda para coagulación electroquirúrgica.
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| US76144006P | 2006-01-24 | 2006-01-24 | |
| US761440P | 2006-01-24 |
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|---|---|
| ES2327005T3 true ES2327005T3 (es) | 2009-10-22 |
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ID=38001681
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES07001491T Active ES2327005T3 (es) | 2006-01-24 | 2007-01-24 | Sistema para la vigilancia en circuito cerrado de un aparato electroquirurgico monopolar. |
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|---|---|
| US (3) | US7927328B2 (es) |
| EP (2) | EP2095783B1 (es) |
| AU (1) | AU2007200289B2 (es) |
| CA (1) | CA2574934C (es) |
| DE (1) | DE602007001348D1 (es) |
| ES (1) | ES2327005T3 (es) |
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2007
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| CA2574934C (en) | 2015-12-29 |
| US20070173806A1 (en) | 2007-07-26 |
| US8475447B2 (en) | 2013-07-02 |
| EP2095783B1 (en) | 2017-10-04 |
| AU2007200289B2 (en) | 2013-01-24 |
| US20120316555A1 (en) | 2012-12-13 |
| US7927328B2 (en) | 2011-04-19 |
| DE602007001348D1 (de) | 2009-08-06 |
| EP1810632B1 (en) | 2009-06-24 |
| CA2574934A1 (en) | 2007-07-24 |
| EP1810632A1 (en) | 2007-07-25 |
| US20110178516A1 (en) | 2011-07-21 |
| US8267928B2 (en) | 2012-09-18 |
| AU2007200289A1 (en) | 2007-08-09 |
| EP2095783A1 (en) | 2009-09-02 |
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