ES2206562T3 - Aparato quirurgico ultrasonico con modo de funcionamiento doble. - Google Patents
Aparato quirurgico ultrasonico con modo de funcionamiento doble.Info
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- ES2206562T3 ES2206562T3 ES96905980T ES96905980T ES2206562T3 ES 2206562 T3 ES2206562 T3 ES 2206562T3 ES 96905980 T ES96905980 T ES 96905980T ES 96905980 T ES96905980 T ES 96905980T ES 2206562 T3 ES2206562 T3 ES 2206562T3
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0223—Driving circuits for generating signals continuous in time
- B06B1/0269—Driving circuits for generating signals continuous in time for generating multiple frequencies
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
- A61B2017/00137—Details of operation mode
- A61B2017/00141—Details of operation mode continuous, e.g. wave
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
- A61B2017/00137—Details of operation mode
- A61B2017/00141—Details of operation mode continuous, e.g. wave
- A61B2017/00146—Details of operation mode continuous, e.g. wave with multiple frequencies
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
- A61B2017/00137—Details of operation mode
- A61B2017/00141—Details of operation mode continuous, e.g. wave
- A61B2017/00146—Details of operation mode continuous, e.g. wave with multiple frequencies
- A61B2017/0015—Details of operation mode continuous, e.g. wave with multiple frequencies applied simultaneously
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320069—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic for ablating tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320071—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic with articulating means for working tip
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320082—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic for incising tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320089—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic node location
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/76—Medical, dental
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Abstract
UN APARATO ULTRASONICO QUIRURGICO SIMPLE (10), PUEDE PROPORCIONAR UN EFECTO DE CORTE SUSTANCIAL EN TEJIDO, UN EFECTO DE COAGULACION SUSTANCIAL EN TEJIDO, Y UNA MEZCLA APROPIADA DE EFECTOS SIMULTANEOS DE CORTE Y DE COAGULACION EN TEJIDO. EL APARATO ULTRASONICO QUIRURGICO (10) ESTA COMPUESTO DE UN MANGO (11), QUE INCORPORA UN TRANSDUCTOR (14) Y UNA HERRAMIENTA QUIRURGICA (16), UNA FUENTE DE ENERGIA ELECTRICA (17), UN CONTROLADOR (18), Y UN INTERRUPTOR (19). EL APARATO PUEDE ACCIONARSE A DOS FRECUENCIAS DENTRO DEL ESPECTRO ULTRASONICO, DONDE LA PRIMERA FRECUENCIA (22) SE SELECCIONA DEL EXTREMO BAJO DEL ESPECTRO PARA UNA REALIZACION REALZADA DE CORTE DE TEJIDO, Y LA SEGUNDA FRECUENCIA (23) ES APROXIMADAMENTE TRES VECES MAS ALTA PARA UNA REALIZACION REALZADA DE COAGULACION DE TEJIDO. LAS DOS FRECUENCIAS PUEDEN ACCIONARSE SELECTIVAMENTE O SIMULTANEAMENTE, Y PUEDEN SER AJUSTABLES INDEPENDIENTEMENTE EN AMPLITUD. EL TRANSDUCTOR (14) PUEDE ESTAR COMPUESTO DE ELEMENTOS MAGNETOESTRICTIVOS O PIEZOELECTRICOS (20 O 21). EL CIRUJANO PUEDE ESTABLECER LA AMPLITUD DESEADA DE LAS VIBRACIONES MECANICAS. EL TRANSDUCTOR (14) ESTA MONTADO DENTRO DEL MANGO (11), EN UNA SITUACION QUE CORRESPONDE A UN NODO DE VIBRACION COMUN, TANTO A LA PRIMERA FRECUENCIA (22) COMO A LA SEGUNDA FRECUENCIA (23). SE REIVINDICA TAMBIEN UN PROCEDIMIENTO PARA SU USO, INCLUYENDO LAS ETAPAS DE: DESARROLLAR UNA RESONANCIA ULTRASONICA A UNA PRIMERA FRECUENCIA (22); DESARROLLAR UNA RESONANCIA ULTRASONICA A UNA SEGUNDA FRECUENCIA (23), QUE SEA APROXIMADAMENTE TRES VECES MAYOR QUE LA PRIMERA FRECUENCIA (22); RESONAR UN TRANSDUCTOR ULTRASONICO (14) A LA PRIMERA FRECUENCIA (22) SIMULTANEAMENTE CON LA SEGUNDA FRECUENCIA (23); Y APOYAR EL TRANSDUCTOR (14) DONDE LOS NODOS DE VIBRACION A LA PRIMERA FRECUENCIA (22) SEAN SUSTANCIALMENTE COINCIDENTES CON LOS NODOS DE VIBRACION A LA SEGUNDA FRECUENCIA (23).
Description
Aparato quirúrgico ultrasónico con modo de
funcionamiento doble.
La invención se refiere a un aparato quirúrgico
de ultrasonidos, mejorado, para cortar y coagular tejido de un
paciente, y más concretamente, a un aparato quirúrgico de
ultrasonidos que tiene la capacidad de emisión selectiva y/o
simultánea de energía ultrasónica a dos frecuencias diferentes. El
documento US-A-5451220 describe, de
forma combinada, las características técnicas expuestas más adelante
en la parte pre-caracterizadora de la
reivindicación 1.
Las herramientas actuales de accionamiento no
eléctrico para la disección de tejido, tales como el escalpelo e
instrumentos asociados, tienden a causar hemorragia en el área
incidida. No hay nada inherente a la herramienta que consiga la
hemostasia. La electrocauterización, o de manera más general, las
herramientas a base de energía electromagnética de radiofrecuencia,
pueden lograr la hemostasia a través de la aplicación de corrientes
eléctricas en el tejido que cauterizan de modo efectivo el tejido
sangrante mediante calentamiento óhmico. La desventaja de las
herramientas de electrocauterización es que no constituyen
herramientas de disección muy buenas, puesto que la aplicación de
energía no se controla de modo preciso y las puntas de las
herramientas pueden pegarse al tejido.
Los expertos en la técnica conocen que el uso de
energía ultrasónica en procedimientos quirúrgicos es un recurso
valioso para cortar y fragmentar tejido de un paciente. La mayor
parte de estos aparatos incorporan una señal sinusoidal de
activación que hace que la punta mecánica vibre con una frecuencia
seleccionada, generalmente en el margen entre 20 y 60 kHz. La señal
sinusoidal de activación puede derivarse de una onda cuadrada con
la misma frecuencia o puede ser inherente al diseño. Además, algunos
dispositivos utilizan formas de onda moduladas de ciclo de trabajo
para lograr un efecto deseado.
También es conocido por los expertos en la
técnica que en la parte inferior del espectro de frecuencias
preferido, es decir, entre 20 y 40 kHz, son posibles desplazamientos
mayores de la punta. Es conocido, también, que los desplazamientos
mayores de la punta proporcionan un mejor efecto de corte de tejido
que los desplazamientos pequeños de la punta.
La energía ultrasónica en la parte superior del
espectro de frecuencias preferido, es decir, entre 40 y 60 kHz,
puede tener un efecto hemostático mayor. Esto se debe a la mayor
capacidad del tejido para absorber energía de frecuencia más
elevada. Sin embargo, a estas frecuencias no son factibles los
desplazamientos grandes de la punta. Por lo tanto, los dispositivos
que funcionan en este ámbito tienen prestaciones de corte de tejido
reducidas.
Se han descrito distintos dispositivos
quirúrgicos de ultrasonidos que intentan proporcionar tanto la
función de corte como la de coagulación. La patente norteamericana
5.026.387 cedida a Ultracision, Inc., tiene varios modos de
funcionamiento. La potencia se transmite al instrumento con una
frecuencia ultrasónica a un nivel relativamente alto cuando va a
efectuarse una función quirúrgica, y la carga del instrumento es
relativamente alta. La potencia se transmite al instrumento a un
nivel relativamente bajo durante los periodos inactivos de uso.
Puede seleccionarse manualmente un modo de coagulación de alta
potencia con retorno automático a un nivel de potencia en modo
inactivo cuando la cuchilla no esté en contacto con el tejido. No se
reivindica el funcionamiento a frecuencias diferentes.
En la patente norteamericana 5.263.957, cedida a
Ultracision, Inc., la forma de una cuchilla ultrasónica está
dispuesta para proporcionar una función de corte y una función de
coagulación. Una parte de la cuchilla está dispuesta para cortar
tejido. Una segunda parte de la cuchilla está dispuesta para
proporcionar acoplamiento con fricción entre el borde de la
cuchilla y el tejido, para obtener movimiento del tejido que
produzca generación de calor y un efecto
\hbox{hemostático.}
La patente extranjera WO 9.314.709 describe una
cuchilla de ultrasonidos con un gancho formado en la cuchilla que
tiene bordes planos, no afilados y relativamente romos. Esto
facilita el corte y la coagulación del tejido cuando se aplica la
energía ultrasónica al tejido.
El objeto general de esta invención es
proporcionar un solo aparato quirúrgico de ultrasonidos que pueda
proporcionar un efecto sustancial de corte del tejido, un efecto
sustancial de coagulación en el tejido y una mezcla apropiada de
efectos simultáneos de corte y coagulación del tejido. Esto se
lleva a cabo haciendo funcionar el aparato a dos frecuencias dentro
de los límites del espectro ultrasónico, seleccionándose la primera
frecuencia en la parte inferior del espectro para mejorar las
prestaciones de corte de tejido, y siendo la segunda frecuencia,
aproximadamente, tres veces mayor, para mejorar las prestaciones de
coagulación en el tejido. Las dos frecuencias pueden aplicarse
selectiva o simultáneamente y pueden ajustarse de modo independiente
en lo que se refiere a la amplitud. La relación 1:3 entre la
primera frecuencia y la segunda frecuencia es una consideración
importante de diseño que no ha sido valorada hasta ahora en el
diseño de dispositivos quirúrgicos de ultrasonidos. La relación
permite que los nodos de las frecuencias primera y segunda de las
vibraciones que se producen a lo largo del transductor lleguen a
estar alineados, proporcionando, de ese modo, puntos de unión
apropiados entre el transductor y una cubierta o mango.
En general, el aparato quirúrgico de ultrasonidos
comprende un mango, un transductor, una herramienta quirúrgica, una
fuente de energía eléctrica, un controlador y un conmutador. El
mango tiene un extremo proximal que es retenido y controlado por el
cirujano y un extremo distal que es posicionado junto al tejido del
paciente. El transductor puede estar compuesto de elementos
magnetostrictivos o piezoeléctricos. El transductor está asegurado
en el interior del mango y es capaz de producir vibraciones
mecánicas ultrasónicas, selectiva o simultáneamente, a una primera
frecuencia y a una segunda frecuencia, siendo la segunda
frecuencia, aproximadamente, tres veces más elevada que la primera
frecuencia.
Aunque se entiende que un transductor que es
hecho funcionar a una frecuencia fundamental tendrá también energía
en los armónicos más elevados, lo que se describe en este caso es
la capacidad de accionar el transductor a dos frecuencias. La
herramienta quirúrgica está asegurada en el transductor y se
extiende, al menos parcialmente, más allá del extremo distal del
mango. Está previsto que la herramienta quirúrgica tenga un efecto
sustancial de corte en el tejido cuando el transductor esté
produciendo vibraciones mecánicas ultrasónicas a la frecuencia
primera (inferior), y está previsto que la herramienta quirúrgica
tenga un efecto sustancial de coagulación en el tejido cuando el
transductor esté produciendo vibraciones mecánicas ultrasónicas a la
segunda frecuencia (superior). Cuando la primera frecuencia y la
segunda frecuencia se apliquen simultáneamente, se obtendrá un
efecto sustancial de coagulación y corte en el tejido del
paciente.
La fuente de energía eléctrica está conectada al
transductor. El controlador está conectado a la fuente de energía
eléctrica y, también, al transductor, para controlar de modo
estable la frecuencia y la amplitud de las vibraciones mecánicas
ultrasónicas. Para lograrlo, el controlador detecta la frecuencia y
la amplitud y, a continuación, ajusta la fuente de energía
eléctrica de modo que mantenga la frecuencia y la amplitud deseadas
del transductor.
Hay un conmutador conectado al controlador para
seleccionar vibraciones mecánicas ultrasónicas con la primera
frecuencia, vibraciones mecánicas ultrasónicas con la segunda
frecuencia o vibraciones mecánicas ultrasónicas simultáneamente con
la primera frecuencia y con la segunda frecuencia.
En una realización, el controlador puede ser
ajustado por el cirujano. Ello hace posible que el cirujano
establezca la amplitud deseada de las vibraciones mecánicas. Para
ello, hay un regulador conectado al controlador. El regulador sería
capaz de ajustar de modo independiente la amplitud de las
vibraciones mecánicas ultrasónicas mientras se está funcionando a
la primera frecuencia o a la segunda frecuencia.
Otra ventaja de disponer las dos frecuencias en
la relación 1:3 es que habrá, al menos, una posición nula a lo
largo del transductor en la que los nodos de vibración de ambas
frecuencias estarán sustancialmente alineados. En la posición nula
habrá poco movimiento relativo entre el transductor y la cubierta
del mango. Por lo tanto, será posible unir el transductor a la
cubierta del mango con un soporte ubicado en una posición nula.
La invención es útil en un método para usar un
aparato quirúrgico de ultrasonidos que incluye los pasos de:
generar una resonancia ultrasónica a una primera frecuencia;
generar una resonancia ultrasónica a una segunda frecuencia que sea
aproximadamente tres veces más elevada que la primera frecuencia; y
hacer que un transductor ultrasónico entre en resonancia a la
primera frecuencia de modo simultáneo con la segunda frecuencia.
También puede contarse con los pasos adicionales de: ajustar la
amplitud de la primera frecuencia y ajustar la amplitud de la
segunda frecuencia.
En un método de fabricación del aparato
quirúrgico de ultrasonidos, el transductor está montado en el
interior de la cubierta del mango, y las ubicaciones de montaje se
seleccionan en posiciones, a lo largo del transductor, que
correspondan a los nodos de desplazamiento de vibración comunes a
la primera frecuencia y a la segunda frecuencia.
la figura 1 es un diagrama de bloques esquemático
de un aparato quirúrgico de ultrasonidos de modo doble.
La figura 2 es un diagrama de bloques esquemático
de una realización de un mango para un aparato quirúrgico de
ultrasonidos de modo doble.
La figura 3 es un diagrama de bloques esquemático
de una realización alternativa de un mango para un aparato
quirúrgico de ultrasonidos de modo doble.
La figura 4 es un gráfico normalizado que
representa la relación entre la primera frecuencia y la segunda
frecuencia.
En la figura 1 se muestra un aparato 10
quirúrgico de ultrasonidos de modo doble. En general, el aparato
quirúrgico de ultrasonidos está compuesto de un mango 11, un
transductor 14, una herramienta 16 quirúrgica, una fuente 17 de
energía eléctrica, un controlador 18 y un conmutador 19. El aparato
10 tiene un mango 11 con un extremo proximal 12 y un extremo distal
13. El mango 11 tiene un transductor ultrasónico 14 asegurado en el
interior de una cubierta 15. Una herramienta 16 quirúrgica está
soportada en el transductor ultrasónico 14.
El mango 11 tiene un extremo proximal 12 que es
retenido y controlado por el cirujano, y un extremo distal 13 que
se posiciona junto al tejido del paciente. El transductor 14 puede
estar compuesto de elementos magnetostrictivos 20, como se muestra
en la figura 2. Alternativamente, el transductor 14 puede estar
compuesto de elementos piezoeléctricos 21, como se muestra en la
figura 3.
El transductor 14 es capaz de producir
vibraciones mecánicas ultrasónicas, selectiva o simultáneamente, a
una primera frecuencia 22 y a una segunda frecuencia 23, como se
muestra en la figura 4. Las frecuencias 22 y 23 se muestran de forma
normalizada en la figura 4, porque la consideración de diseño
importante es la relación entre las dos frecuencias 22 y 23. La
segunda frecuencia 23 es, aproximadamente, tres veces mayor que la
primera frecuencia 22. Las ubicaciones de los nodos de vibración
correspondientes tanto a la primera frecuencia 22 como a la segunda
frecuencia 23 se muestran como ubicaciones 24 y 25 en la figura
4.
La herramienta quirúrgica 16 está soportada en el
transductor 14 y se extiende, al menos parcialmente, más allá del
extremo distal 13 del mango. Está previsto que la herramienta 16
quirúrgica tenga un efecto sustancial de corte en el tejido cuando
el transductor 14 esté produciendo vibraciones mecánicas
ultrasónicas a la primera frecuencia 22, y está previsto que la
herramienta quirúrgica 16 tenga un efecto sustancial de coagulación
en el tejido cuando el transductor 14 esté produciendo vibraciones
mecánicas ultrasónicas a la segunda frecuencia 23.
La fuente 17 de energía eléctrica está conectada
al transductor 14. El diseño de la fuente de energía eléctrica 17
puede realizarse de muchas formas, que son antiguas y bien
conocidas en la técnica. El controlador 18 está conectado a la
fuente 17 de energía eléctrica y también al transductor 14, para
controlar de modo estable la frecuencia y la amplitud de las
vibraciones mecánicas ultrasónicas. Para lograrlo, el controlador
18 detecta la frecuencia y la amplitud y, a continuación, ajusta la
fuente 17 de energía eléctrica de modo que se mantengan la
frecuencia y la amplitud deseadas del transductor 14. El diseño
específico del controlador 18 puede ser realizado de muchas formas,
que son antiguas y bien conocidas en la técnica.
Un conmutador 19 está conectado al controlador
para seleccionar vibraciones mecánicas ultrasónicas con la primera
frecuencia 22, o vibraciones mecánicas ultrasónicas con la segunda
frecuencia 23 o vibraciones mecánicas ultrasónicas simultáneamente
con la primera frecuencia 22 y con la segunda frecuencia 23.
En una realización, el controlador 18 puede ser
ajustado por el cirujano. Ello hace posible que el cirujano regule
la amplitud deseada de las vibraciones mecánicas. Para ello, hay un
regulador 26 conectado al controlador 18. El regulador 26 es capaz
de ajustar de modo independiente la amplitud de las vibraciones
mecánicas ultrasónicas mientras que se funciona a la primera
frecuencia 22 o a la segunda frecuencia 23.
Otra ventaja de disponer las dos frecuencias en
la relación 1:3 es que habrá al menos una posición nula a lo largo
del transductor 14 en la que los nodos de vibración de ambas
frecuencias 22 y 23 estarán alineados. Por lo tanto, no habrá
movimiento relativo del transductor 14 en esa ubicación y será
posible unir el transductor 14 a la cubierta 15. En consecuencia,
puede conectarse al menos un soporte 27 entre la cubierta 15 y el
transductor 14, y el soporte 27 puede posicionarse, a lo largo del
transductor, en una ubicación que corresponda a un nodo de vibración
común a la primera frecuencia 24 y a la segunda frecuencia 25, como
se muestra en la figura 4.
También se reivindica un método para usar un
aparato 10 quirúrgico ultrasónico que incluye los pasos de: generar
una resonancia ultrasónica a una primera frecuencia 22; generar una
resonancia ultrasónica a una segunda frecuencia 23 que sea
aproximadamente tres veces mayor que la primera frecuencia 22; y
hacer que un transductor ultrasónico 14 entre en resonancia a la
primera frecuencia 22 simultáneamente con la segunda frecuencia 23,
estando los nodos de vibración del transductor 14 a la primera
frecuencia 22 alineados con los nodos de vibración del transductor
14 a la segunda frecuencia 23, como se muestra en las ubicaciones 24
y 25 de la figura 4.
En una realización, puede haber, también, los
pasos adicionales de ajustar la amplitud de la primera frecuencia
22, ajustar la amplitud de la segunda frecuencia 23 y ajustar la
amplitud de la primera frecuencia 22 de modo independiente de la
segunda frecuencia 23. También se reivindica un método para fabricar
un aparato 10 quirúrgico ultrasónico de modo doble en el que el
transductor 14 está montado dentro de un mango 11 en ubicaciones 27
de montaje que están en posiciones seleccionadas a lo largo del
transductor 14, que corresponden a nodos de vibración comunes a la
primera frecuencia 22 y a la segunda frecuencia 23, como se muestra
mediante las posiciones 24 y 25 de la figura 4.
Claims (6)
1. Un aparato (10) quirúrgico ultrasónico para
ser usado por un cirujano para operar sobre tejido de un paciente
que comprende:
un mango (11) que tiene un extremo proximal (12)
que es retenido y controlado por el cirujano;
un extremo distal (13) en el mango para
posicionarlo junto al tejido del paciente;
un transductor (14), soportado en el interior del
mango, siendo el transductor capaz de producir vibraciones
mecánicas ultrasónicas sustancialmente a una primera frecuencia
(22) y sustancialmente a una segunda frecuencia (23), siendo la
segunda frecuencia, aproximadamente, tres veces mayor que la primera
frecuencia;
una herramienta quirúrgica (16) soportada en el
transductor y que se extiende generalmente más allá del extremo
distal, teniendo la herramienta quirúrgica un efecto sustancial de
corte en el tejido cuando es hecha funcionar, de modo selectivo, a
la primera frecuencia, teniendo la herramienta quirúrgica un efecto
sustancial de coagulación en el tejido cuando es hecha funcionar, de
modo selectivo, a la segunda frecuencia, teniendo la herramienta
quirúrgica efectos sustanciales de corte y coagulación en el tejido
cuando es hecha funcionar, simultáneamente, a las frecuencias
primera y segunda;
una fuente (17) de energía eléctrica para
conectar al transductor;
un controlador (18), conectado entre la fuente de
energía eléctrica y el transductor, para generar señales a fin de
controlar de modo estable las frecuencias y las amplitudes de las
vibraciones mecánicas ultrasónicas del transductor, y,
un conmutador (19) conectado al controlador, para
seleccionar las señales a fin de controlar de modo estable las
vibraciones mecánicas ultrasónicas del transductor a la primera
frecuencia, cuando el conmutador está en una primera posición, y las
vibraciones mecánicas ultrasónicas del transductor a la segunda
frecuencia, cuando el conmutador está en una segunda posición;
caracterizado porque:
el conmutador tiene una tercera posición, para
generar vibraciones mecánicas ultrasónicas del transductor,
simultáneamente, a la primera frecuencia y a la segunda frecuencia,
cuando el conmutador está en una tercera posición.
2. El aparato de la reivindicación 1, en el que
un regulador (26) está conectado al controlador, siendo el
regulador capaz de ser usado por el cirujano para cambiar las
señales generadas por el controlador a fin de ajustar la amplitud de
las vibraciones mecánicas ultrasónicas.
3. El aparato de las reivindicaciones 1 ó 2, en
el que el transductor incluye un elemento piezoeléctrico (21).
4. El aparato de las reivindicaciones 1 ó 2, en
el que el transductor incluye un elemento magnetostrictivo
(20).
5. El aparato de cualquiera de las
reivindicaciones precedentes, en el que al menos un soporte (27)
está conectado entre el mango y el transductor, estando el soporte
posicionado a lo largo del transductor en una ubicación que
corresponda, sustancialmente, a un nodo de vibración común a la
primera frecuencia y a la segunda frecuencia.
6. Un método para fabricar un mango quirúrgico de
ultrasonidos según la reivindicación 1, que incorpora un componente
de cubierta (15) que es retenido por un cirujano y un componente de
transductor que está soportado en el interior de la cubierta,
siendo el componente de transductor capaz de producir vibraciones
mecánicas ultrasónicas a la primera frecuencia y a la segunda
frecuencia, comprendiendo el método los pasos de:
montar el transductor, en el interior de la
cubierta, en una o más ubicaciones de montaje, y seleccionar las
ubicaciones de montaje en posiciones a lo largo del transductor que
correspondan, sustancialmente, a nodos de vibración comunes a la
primera frecuencia y a la segunda frecuencia.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US08/360,538 US5628743A (en) | 1994-12-21 | 1994-12-21 | Dual mode ultrasonic surgical apparatus |
PCT/IB1996/000280 WO1997037598A1 (en) | 1994-12-21 | 1996-04-04 | Dual mode ultrasonic surgical apparatus |
CA002228659A CA2228659A1 (en) | 1994-12-21 | 1996-04-04 | Dual mode ultrasonic surgical apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2206562T3 true ES2206562T3 (es) | 2004-05-16 |
Family
ID=27170622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES96905980T Expired - Lifetime ES2206562T3 (es) | 1994-12-21 | 1996-04-04 | Aparato quirurgico ultrasonico con modo de funcionamiento doble. |
Country Status (10)
Country | Link |
---|---|
US (1) | US5628743A (es) |
EP (1) | EP0891154B1 (es) |
JP (1) | JPH11503061A (es) |
AT (1) | ATE249174T1 (es) |
AU (1) | AU4952496A (es) |
CA (1) | CA2228659A1 (es) |
DE (1) | DE69629946T2 (es) |
ES (1) | ES2206562T3 (es) |
NO (1) | NO980326L (es) |
WO (1) | WO1997037598A1 (es) |
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-
1994
- 1994-12-21 US US08/360,538 patent/US5628743A/en not_active Expired - Fee Related
-
1996
- 1996-04-04 JP JP9535990A patent/JPH11503061A/ja active Pending
- 1996-04-04 DE DE69629946T patent/DE69629946T2/de not_active Expired - Fee Related
- 1996-04-04 WO PCT/IB1996/000280 patent/WO1997037598A1/en active IP Right Grant
- 1996-04-04 AU AU49524/96A patent/AU4952496A/en not_active Abandoned
- 1996-04-04 EP EP96905980A patent/EP0891154B1/en not_active Expired - Lifetime
- 1996-04-04 CA CA002228659A patent/CA2228659A1/en not_active Abandoned
- 1996-04-04 ES ES96905980T patent/ES2206562T3/es not_active Expired - Lifetime
- 1996-04-04 AT AT96905980T patent/ATE249174T1/de not_active IP Right Cessation
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1998
- 1998-01-26 NO NO980326A patent/NO980326L/no unknown
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EP0891154B1 (en) | 2003-09-10 |
NO980326D0 (no) | 1998-01-26 |
ATE249174T1 (de) | 2003-09-15 |
AU4952496A (en) | 1997-10-29 |
US5628743A (en) | 1997-05-13 |
NO980326L (no) | 1998-03-26 |
WO1997037598A1 (en) | 1997-10-16 |
DE69629946D1 (de) | 2003-10-16 |
CA2228659A1 (en) | 1997-10-16 |
DE69629946T2 (de) | 2004-07-15 |
MX9801152A (es) | 1998-05-31 |
JPH11503061A (ja) | 1999-03-23 |
EP0891154A1 (en) | 1999-01-20 |
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