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MXPA04004891A - Instrumento quirurgico de engrapado que incorpora un mecanismo de accionamiento de vigueta en e. - Google Patents

Instrumento quirurgico de engrapado que incorpora un mecanismo de accionamiento de vigueta en e.

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Publication number
MXPA04004891A
MXPA04004891A MXPA04004891A MXPA04004891A MXPA04004891A MX PA04004891 A MXPA04004891 A MX PA04004891A MX PA04004891 A MXPA04004891 A MX PA04004891A MX PA04004891 A MXPA04004891 A MX PA04004891A MX PA04004891 A MXPA04004891 A MX PA04004891A
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Mexico
Prior art keywords
fixed jaw
staple cartridge
channel
surgical instrument
drive
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Application number
MXPA04004891A
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English (en)
Inventor
Frederick E Shelton Iv
Original Assignee
Johnson & Johnson
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Publication of MXPA04004891A publication Critical patent/MXPA04004891A/es

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B17/07207Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214Stapler heads
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214Stapler heads
    • A61B2017/07242Stapler heads achieving different staple heights during the same shot, e.g. using an anvil anvil having different heights or staples of different sizes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214Stapler heads
    • A61B2017/07285Stapler heads characterised by its cutter

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Materials For Medical Uses (AREA)

Abstract

Un instrumento quirurgico para corte y engrapado adecuado para procedimientos clinicos laparoscopicos y endoscopicos, prensas de tejido dentro de efector de extremo de un canal alargado, opuesto en pivote mediante una quijada fija; una barra de accionamiento con vigueta en E se mueve distalmente a traves de efector de extremo prensado para cortar tejido y para impulsar grapas en cada lado del corte; la barra de accionamiento de vigueta en E separa afirmativamente la quijada fija del canal alargado para asegurar grapas cerradas adecuadamente formadas, especialmente cuando se prensa una cantidad de tejido que es inadecuada para separar el efector de extremo; en particular, un pasador superior de la barra de accionamiento se mueve longitudinalmente a traves de una ranura de quijada fija y se captura una ranura del canal entre una tapa inferior y un pasador medio de la barra de accionamiento para asegurar una separacion minima.

Description

INSTRUMENTO QUIRURGICO DE ENGRAPADO QUE INCORPORA UN i I MECANISMO DE ACCIONAMIENTO DE VIGUETA EN E REFERENCIA CRUZADA A SOLICITUDES RELACIONADAS | i La present solicitud está relacionada con las cuatro solicitudes i co-pendientes y de propiedad común presentadas en la misma fecha con la í presente, descripciones de las cuales se incorporan a la presente para ¡ referencia en su totalidad y tales cuatro solicitudes están tituladas i respectivamente como sigue: (1 ) "SURGICAL STAPLING INSTRUMENT HAVING A SINGLE í LOCKOUT MECHANISM FOR PREVENTION OF FIRING" a¡ Frederick E.
Shelton IV, Mike Setser, y Bruce Weisenburgh; (2) "SURGICAL STAPLING INSTRUMENT HAVING SEPARATE DISTINCT CLOSING & FIRING SYSTEMS" a Frederick E. Shelton, Mike Setser, y Brian J. Hemmelgarn; (3) "SURGICAL STAPLING INSTRUMENT HAVING A SPENT i CARTRIDGE LOCKOUT" a Frederick E. Shelton IV, Mike Seiser, y Bruce Wisenburgh; y j (4) "SURGICAL STAPLI NG INSTRUMENT INCR'OPORATING AN E-BEAM FI RING MECHANISM" a Frederick E. Shelton IV, Mike Setser, y Bruce Weisenburgh.
CAMPO DE LA INVENCION La presente invención se relaciona en general a instrumentos de engrapadoras quirúrgicas que son capaces de aplicar líneas! de grapas a tejidos y simultáneamente cortar el tejido entre estas líneas de cjrapas y, en lo í particular, a mejoras relacionadas con instrumentos de engrapadoras y mejoras en los procedimientos para formar diversos componentes de tales instrumentos de engrapadora. J ! ANTECEDENTES DE LA INVENCION j í I laparoscópicas, son capaces de pasar a través de un pasaje dé cánula. Uno I de los elementos de mordaza recibe un cartucho de grapas que tiene por lo i menos dos filas de grapas lateralmente separadas. El otro ¡elemento de mordaza define una quijada fija que tiene cavidades para formaéión de grapa alineadas con las filas de grapas en el cartucho. El instrumento incluye una pluralidad de cuñas alternantes las cuales, cuando son; impulsadas distalmente, pasan a través de aberturas en el cartucho de grapas y que acoplan a los impulsores que dan soporte a las grapas para llevar a cabo el accionamiento de las grapas hacia la quijada fija. El corte de tejido simultáneo mientras se forman las filas de grapas en cada lado del corte, reduce el sangrado y simplifica el procedimiento quirúrgico. Sin embargo, una cantidad apropiada de tejido debe ser prensada entre las mordazas de manera que una formación adecuada de la grapa se logre y de esta manera un elemento de corte no se una o no haga el corte total del tejido prensado. ; Un instrumento de corte y engrapado que mantiene una separación de mordaza máxima se describe en la patente de E.U.A. No. 4,429,695. En particular, un portador de cuchilla central tiene una cubierta superior que entra en un pasaje superior a través de una abertura cuando la mordaza superior es cerrada y tiene una cubierta inferior que es recibida dentro de un paso inferior de la mordaza inferior. Así, conforme el portador de cuchilla avanza distalmente, las cubiertas colocan vertical y lateralmente las mordazas superior e inferior. La patente de E.U.A. No. 4,429,695 muestra que las cubiertas están unidas al portador de cuchilla central pára resistir la desviación vertical (abertura) de las mordazas durante el rechazó y formación de las grapas. Como se mostró, las fuerzas tienden a abrir verticalmente las mordazas durante el engrapado. Sin embargo, no se hace mención de las fuerzas de resistencia que se pueden aplicar para cerrar verticalmente las mordazas. Además, está referencia muestra que el dispositivo descrito en la presente es montado desde dos elementos separados, no conectados, que se llevan en conjunto y que son prensados en el tejido. Los dos elementos forman un dispositivo adecuado solo para un procedimiento de abertura que i no tiene limitaciones de dimensión. ¡ Los procedimientos endoscópicos y laparoscópicos son preferidos de manera incrementada sobre los procedimientos de abertura i debido a sus tiempos de recuperación post-operativos reducidos y otras ventajas. Los instrumentos de corte y engrapado endoscópicos usan una I 1 mordaza de corredera larga que tiende a desviarse hacia arriba cuando es prensada sobre los tejidos gruesos. Sobre el tejido grueso, esta desviación ascendente del extremo libre (distal) de la mordaza puede provocar diferencias en altura de las grapas formadas conforme la abertura distal entre la quijada fija y el cartucho es mayor que la abertura proximal. Para asegurar más uniformidad proximal con respecto a la formación de la grapa distal, la I quijada fija frecuentemente es doblada hacia adentro hacia el cartucho de ? grapas. Esta cámara es mejor aún para los tejidos gruesos y pueden provocar que la grapa se forme en el extremo distal cuando se usa én los tejidos i delgados. Para superar este cierre distal estrecho, pasadores q salientes se i han añadido a la superficie de compresión del cartucho adyacente al extremo distal del cartucho. El cierre de la quijada fija sobre el pasador asegura una abertura mínima en el extremo distal. Sin embargo, los cirujanos piensan que los pasadores o salientes provocan el trauma del tejido. Lo que sé necesita es un mecanismo para mantener una abertura mínima entre la quijada fija y el cartucho y un mecanismo para mantener una abertura máxima entre la quijada fija y el cartucho. Se describe en la patente de E.U.A No. 5,465,895 un ejemplo de una engrapadora quirúrgica adecuada para aplicaciones endoscópicas, la cual provee convenientemente acciones de cierre y accionamiento distintas. Con la misma, un clínico es capaz de cerrar los elementos de mordaza sobre el tejido para colocar el tejido previo a su accionamiento. Una vez qué el clínico ha Í determinado que los elementos de mordaza están agarrando apropiadamente el tejido, el clínico puede entonces accionar la engrapadora quirúrgica, cortando y engrapando, de esta manera el tejido. El corte y engrapado simultáneos evitan complicaciones que pudieran surgir cuando se llevan a cabo tales acciones en secuencia con diferentes herramientas quirúrgicas que cortan o engrapan únicamente. Una ventaja específica de poder cerrar el tejido antes del accionamiento es que el clínico es capaz de verificar mediante un endoscopio que se ha capturado una cantidad suficiente de tejido entre mordazas opuestas. Por otro lado, las mordazas opuestas se pueden juntar de manera demasiado estrecha, comprimiendo especialmente en sus extremos dístales y no formando efectivamente así grapas cerradas en el tejido cortado. Aún más, una barra de accionamiento que atraviese entre mordazas opuestas para cortar el tejido e impulsar las cuñas que impulsan las grapas, puéde enfrentar resistencia debido a las mordazas opuestas comprimidas.
Así, aunque tales engrapadoras quirúrgicas han sido un avance ¡ significativo en procedimientos quirúrgicos, se ha detectado una oportunidad para mejorar su efectividad. En particular, será deseable; mantener la separación apropiada afirmativamente entre las mordazas opuestas durante el accionamiento, de las desviaciones de abertura y cierre. En I particular, los dispositivos endoscópicos necesitan ajustarse en un dispositivo de acceso tal como un trocar, y deben mantener un diámetro de flecha pequeño. A la fecha, no se ha proporcionado un dispositivo de engrapado endoscópico que tenga una cavidad para un par de pasajes longitudinales para la cubierta en un cortador que resista las cargas de mordaza de tensión y compresión.
Además, es deseable mantener otras ventajas sobre la patente No. 5,465,895 para incluir una corredera de cuña integral a un cartucho de grapas, más que tener superficies de camino unidas a un cortador. Por tanto, la fabricación de un cortador se simplifica, como la instalación de cartucho de grapas. De manera significativa, una corredera de cuña integral se puede designar específicamente para cada tamaño y aplicación de un cartucho de grapas, permitiendo que el instrumento de corte y engrapado incremente el número de usos. En particular, el grosor del cartucho de grapas puede basar en el grosor de tejido deseado. También el número y separación de filas de grapas puede variar. ; En consecuencia, existe una necesidad significativa para un instrumento de corte y engrapado quirúrgico mejorado que nriantenga una Í separación apropiada en su efector de extremo para lograr un engrapado apropiado del tejido dividido, y que retenga las ventajas de un cartucho de j grapas que tiene una corredera de cuña integral.
BREVE DESCRIPCION DE LA INVENCION ! { La invención supera las deficiencias anteriores / otras de la técnica antecedente al proveer un mecanismo de accionamiento que separa afirmativamente verticalmente un efector de extremo de uri instrumento quirúrgico de engrapado y corte. De esta manera, el instrumento asegura i estructuralmente una adecuada separación para lograr un engrapado apropiado, aún en casos cuando muy poco de tejido es sujetado en el efector de extremo.
En un aspecto de la invención, un instrumento quirúrgico incluye í una porción de manija que es operable para producir un movimiento de accionamiento que activa una porción de implementación. Esta porción de implementación tiene un canal alargado que recibe un cartucho de grapa i opuesto a una quijada fija unida con movimiento de pivote. Un mecanismo de I accionamiento incluye un borde de corte presentado distalmente y recibido distalmente entre el canal alargado y la quijada fija, un elemento superior i puede ser acoplable al canal de la quijada fija, un elemento inferior que acopla la ranura del canal, y un elemento intermedio operable para! accionar la corredera de cuña, que es integral al cartucho de grapas. El elemento intermedio que comprime convenientemente en forma opuesta el efector de extremo, asegura una formación de la grapa apropiada, aúiji cuando otra cantidad muy pequeña de tejido se haya comprimido.
En otro aspecto de la invención, el instrumento quirúrgico esta provisto con lo adecuado para los procedimientos endolquirúrgicos y laparoscópicos debido a que tiene un efector de extremo idimensionado I I diametralmente y una flecha de la porción de implementación. Úna la porción de manija produce un movimiento de cierre y un movimiento de Accionamiento que se transfieren distalmente a través de la flecha de la porción de i implementación. El mecanismo de accionamiento responde al riovimiento de accionamiento al acoplar la quijada fija y el canal alargado para efectuar el ! corte del tejido comprimido y para separar apropiadamente la quijada fija y el canal alargado para asegurar una formación apropiada de la grapa.
Serán evidentes estos y otros objetivos y ventajas ele la presente invención a partir de los dibujos anexos y la descripción de los mismos.
BREVE DESCRIPCION DE LOS DIBUJOS Los dibujos anexos, que se incorporan y son parte de esta especificación, ilustran modalidades de la invención y, junto con a descripción general de la invención dada anteriormente y la descripción de; :allada de las modalidades dadas a continuación, sirven para explicar los principios de la presente invención. i La figura 1 ilustra una vista en elevación lateral parcialmente cortada de un instrumento quirúrgico de engrapado y corte en una posición abierta.
La figura 2 ilustra una vista en detalle en elevación lateral transversal a lo largo de la línea 2-2 de la figura 1 de un efector de extremo del instrumento quirúrgico de engrapado y corte.
La figura 3 ilustra una vista en elevación lateral aumentada de la barra de accionamiento del instrumento quirúrgico de engrapadó y corte de la figura 2.
La figura 4 ilustra una vista frontal aumentada de la barra de accionamiento del instrumento quirúrgico de engrapado y corte de la figura 2.
La figura 5 ilustra una vista en detalla en elevación lateral transversal de un efector de extremo alternativo para el instrumento quirúrgico ¡ de engrapado y corte de la figura 1 , que incorpora una barra de accionamiento que no cuenta con un pasador medio para prevenir la compresión del efector de extremo.
La figura 6 ¡lustra una vista en elevación lateral de una porción de manija de un extremo proximal del instrumento quirúrgico de engrapado y corte de la figura 1 , con el costado izquierdo removido para exponer las partes interiores en una posición sin prensar y sin haber sido accionado ;("inicio"). La figura 7 ilustra una vista en despiezada, en perspectiva, de la posición de manija del extremo proximal del instrumento quirúrgico de engrapado y corte de la figura 1.
La figura 8 ilustra una vista en elevación lateral dé la porción de manija del extremo proximal del instrumento quirúrgico de engrapado y corte de la figura 1 con el costado izquierdo removido para exponer las partes interiores en la posición cerrada ("prensada").
La figura 9 ilustra una vista en elevación lateral de. la porción de manija del extremo proximal del instrumento quirúrgico de engrapado y corte de la figura 1 con el lado izquierdo removido para exponer las partes interiores en la posición de engrapado y corte ("accionada").
La figura 10 ilustra una vista isométrica del efector de extremo en el extremo distal del instrumento quirúrgico de engrapado y corté de la figura 1 con la quijada fija en la posición hacia arriba o abierta que expone el cartucho I de grapas y el borde de corte de la barra de accionamiento.
La figura 11 ilustra una vista despiezada, isométrica, de la porción de implementación del instrumento quirúrgico de engrapado y corte de la figura 1.
La figura 12 ¡lustra una vista isométrica del efector de extremo en el extremo distal del instrumento quirúrgico de engrapado y corte de la figura 1 con la quijada fija en la posición superior o abierta con el cartucho removido a distancia que expone un impulsor de grapas individual y un impulsor de grapa doble como ejemplo y una corredera de cuña en su posición de inicio contra un pasador medio de la barra de accionamiento.
La figura 13 ilustra una vista isométrica del extremo distal del instrumento quirúrgico de engrapado y corte de la figura 1 con la quijada fija en la posición superior o abierta con el cartucho de | grapas está j completamente removido y una porción de un canal alargado removido para f exponer el pasador más inferior de la barra de accionamiento. i La figura 14 ilustra una vista en elevación lateral én sección que i muestra una relación mecánica entre la quijada fija, el canal] alargado y el cartucho de grapas en la posición cerrada del instrumento quirúrgico de engrapado y corte de la figura 1 , y la sección se toma por lo general a lo largo i de las líneas 14-14 de la figura 10 para exponer la corredera de cuña, los impulsores de grapas y las grapas pero que también ilustra la barra de accionamiento a lo largo de la línea central longitudinal.
La figura 15 ilustra una vista en sección del efectpr de extremo del instrumento quirúrgico de engrapado y corte con el cartucho y barra de accionamiento en la posición de inicio tomados a lo largo de la línea 15-15 de la figura 10.
La figura 16 ilustra una vista en sección tomada a lo largo de la línea 16-16 de la figura 15 que muestra la relación transversal |entre la barra de accionamiento, el canal alargado, la corredera de cuña, los impulsores de grapas, las grapas y el cartucho de grapas. ¡ I La figura 17 ilustra una vista en sección en elevación lateral del instrumento quirúrgico de engrapado y corte de la figura 1 tomada a lo largo de la línea central longitudinal del efector de extremo en juna posición parcialmente cerrada pero sin prensar agarrando tejido. ! La figura 18 ilustra una vista en elevación lateral parcialmente cortada del instrumento quirúrgico de engrapado y corte de la ¡figura 1 en la posición cerrada o de prensado.
La figura 19 ilustra una vista en elevación lateral en la sección de línea central del extremo distal del instrumento quirúrgico de' engrapado y corte de la figura 1 y una posición cerrada o de prensadoi con el tejido comprimido apropiadamente. ¡ La figura 20 ilustra una vista en elevación lateral parcialmente cortada del instrumento quirúrgico de engrapado y corte de la ¡figura 1 en la posición parcialmente accionada.
La figura 21 ilustra una vista en sección de línea central del extremo distal del instrumento quirúrgico de engrapado y corte (de la figura 1 en una posición parcialmente accionada.
La figura 22 ilustra una vista en elevación lateral! parcialmente cortada de un instrumento quirúrgico de engrapado y corte de la figura 1 en una posición totalmente accionada.
La figura 23 ilustra una vista en sección de línea central del extremo distal del instrumento quirúrgico de engrapado y corte de la figura 1 en una posición totalmente accionada.
DESCRIPCION DETALLADA DE LA INVENCION En referencia a los dibujos nuevamente, en donde los números similares denotan componentes similares en las diversas vistas, las figuras 1 y 2 ilustran un instrumento quirúrgico de engrapado y corte 10 que es capaz de llevar acabo los beneficios únicos de la presente invención. Él instrumento quirúrgico de engrapado y corte 10 incorpora un efector de extremo 12 que cuenta con un mecanismo de accionamiento de vigueta en E ("barra de accionamiento") 14 que controla convenientemente la separación del efector de extremo 12. En particular, se mantienen un canal alargado 16 y una quijada fija trasladable con efecto de pivote 18 en una separación que asegura un engrapado y corte efectivos. Los problemas se evitan cuando se asocian con cantidades variables de tejido que es capturado en el efector de extremo 12. El instrumento quirúrgico de engrapado y corte 10 incluye una porción de manija 20 conectada a una porción de ¡mplementación 22, y esta última además comprende una flecha 23 que termina distalmenté en el efector de extremo 12. La porción de manija 20 incluye un mango de pistola 24 hacia el cual el clínico atrae con efecto de pivote un gatillo de cierre 26 para ocasionar el prensado o cierre de quijada fija 18 hacia el canal alargado 16 del efector de extremo 12. Un gatillo de accionamiento 28 esta más externamente hacia fuera del gatillo de cierre 26 y que el clínico atrae con efecto de pivote para efectuar el engrapado y corte del tejido prensado en el efecto de extremo 12. Se observará que los términos "próximal" y "distal"; se utilizan en la presente con referencia a un clínico que agarra una manija de un instrumento. Así, el efector de extremo 12 es distal con respecto a la porción de manija más próximal 20. Se observara adicionalmente que por motivo de conveniencia y claridad, se utilizan en la presente los términos de espacio como "vertical" y "horizontal" con respecto a los dibujos. Sin embargo, los instrumentos quirúrgicos se utilizan en muchas orientaciones y posiciones y no se pretende que estos términos sean restrictivos y absolutos. El gatillo de cierre 26 se acciona primero. Una vez el clínico esta satisfecho con el posicionamíento del efector de extremo 12, el ¡clínico puede retraer el gatillo de cierre 26 a su posición totalmente cerrada y bloqueada próxima al mango de pistola 24. Posteriormente, se acciona el gatillo de accionamiento 28. El gatillo de accionamiento 28 retorna mediante acción de resorte cuando el clínico retira la presión. Cuando se oprime 1 un botón de liberación 30 en el extremo próximal de la porción de manija 20, libera cualquier gatillo de cierre bloqueado 26. j Un casquillo de cierre 32 rodea un bastidor 34, el cual a su vez rodea a un elemento de impulso de accionamiento 36 que es posicionado por el gatillo de accionamiento 28. El bastidor 34 conecta la porción de manija 20 al efector de extremo 12. Con el casquillo de cierre 32 retraído proximalmente por el gatillo de cierre 26 según se ilustra, la quijada fija 18 se abre mediante efecto de resorte, alejándose con efecto de pivote del canal alargado 16 y trasladándose proximalmente con el casquillo de cierre 32. El canal alargado 16 recibe un cartucho de grapas 37 que responde a la barra de accionamiento 14 para impulsar las grapas para que hagan contacto y tomen forma con la quijada fija 18. Se observará que aunque se describe en la presente un cartucho de grapas fácilmente reemplazable 37, un cartucho de grapas 37 puede fijarse permanentemente o ser parte íntegra con el canal alargado 16 y que vaya de acuerdo con los aspectos de la presente invención, por ejemplo, cuando uná porción más grande del efector de extremo 12 se reemplace después de cada accionamiento. < MECANISMO DE ACCIONAMIENTO DE VIGUETA EN "E" Con referencia particular a las figuras 2-4, ; la barra de accionamiento 14 incluye tres pasadores separados verticalmente que controlan la separación del efector de extremo 12 durante el accionamiento. En particular, se gradúa la entrada de un pasador superior 38 a una cavidad de quijada fija 40 cerca del pivote entre la quijada fija 18 y el canal alargado 16. Cuando el pasador superior 38 se acciona con la quijada fija 18 cerrada, este avanza distalmente dentro de una ranura de quijada fija longitudinal 42 que se extiende distalmente a través de la quijada fija 8. Cualquier deflexión menor hacia arriba en la quijada fija 18 es superada por una fuerza descendente impartida por el pasador superior 38.
La barra de accionamiento 14 también incluyé un pasador ! inferior, o tapa de barra de accionamiento 44, que acopla de manera ascendente una ranura de canal 45 en el canal alargado 16, cooperando así con el pasador superior 38 para acercar a la quijada fija 18 y al canal alargado 16 un poco más en caso de que se prense tejido excesivo entre jastos.
La barra de accionamiento 14 incluye convenientemente un pasador medio 46 que pasa a través de una ranura dé impulso de í accionamiento 47 formada en una superficie inferior del cartucho 37 y una superficie ascendente del canal alargado 16, impulsando así las grapas dentro de esta como se describe a continuación. El pasador medio 46 , al deslizarse contra el canal alargado 16, resiste convenientemente cualquierjtendencia del efector de extremo 12 a hacer cerrado por comprensión en su extremo distal. Para ilustrar una ventaja del pasador medio 46, la figura 5 ilustra un efector de extremo alternativo 12' que no cuenta con un pasador medio en una barra de accionamiento 14'. En esta ilustración, se permite al efector de extremo 12' ser cerrado por comprensión en su extremo distal, que tiende a obstaculizar la formación deseada de la grapa.
Con referencia nuevamente a las figuras 2-4, un bbrde de corte i presentado distalmente 48 entre los pasadores superior y medio 38, 46 en la barra de accionamiento 14 atraviesa una ranura vérticai presentada proximalmente 49 en el cartucho 37 para cortar el tejido Iprensado. El posicionamiento afirmativo de la barra de accionamiento 14 con respecto al canal alargado 16 y la quijada fija 18 aseguran que se lleva apabo un corte efectivo.
QUIJADA FUA ARQUEADA CON BRECHA PARA CARTUCHO SELECCIONADO La separación vertical afirmativa provista por ! la barra de accionamiento con vigueta en E 14, es adecuada para el tamaño ilimitado disponible en dispositivos endoscópicos. Aún más, la barra de accionamiento con vigueta en E 14 permite la fabricación de una quijada fija 16 con una comba que imparte una deflexión vertical en su extremo distal, similar a la í posición ¡lustra en la figura 5. Esta quijada fija arqueac a 16 ayuda convenientemente a lograr la brecha deseada en el efector de extremo 12 I incluso con un grosor reducido de la quijada fija 16, lo cual es aún más adecuado para limitaciones de tamaño de un dispositivo endoscópico. La barra de accionamiento con vigueta en E 14 adjemás permite un mayor número de aplicaciones, especialmente en combinación con una escala de configuraciones de cartucho de grapas. Por ejemplo, un clínico ! puede seleccionar un cartucho de grapas grises que generen una brecha en el tejido de 0.02mm, un cartucho de grapas blancas que generen una brecha en el tejido de 0.04mm, un cartucho azul que genere una brecha ejn el tejido de 0.06mm o un cartucho verde que genere una brecha en el tejidó 0.10mm. La altura vertical de cada cartucho de grapas correspondiente en combinación con la longitud de las grapas y una corredera de cuña integral (que se describe con mayor detalle a continuación) predetermina el grosor de tejido deseado con la quijada fija 18 separada de manera vertical y apropiadamente mediante la barra de accionamiento de vigueta en E 14.
MANIJA DE DOS EJES Con referencia a las figuras 6-9, la porción de manija 20 comprende una primera y segundo secciones de base 50 !y 52 que se moldean a partir de. un material polimérico como un policarbona :o llenado con vidrio. La primera sección de base 50 esta provista con una pluralidad de pasadores de forma cilindricas 54. La segunda sección de base 52 incluye una pluralidad de elementos de extensión 56, cada uno teniendo una abertura con forma hexagonal 58. Los pasadores de forma cilindrica 54 son recibidos dentro de las aberturas con forma hexagonal 58 y se mantienen mediante fricción en las mismas para mantener ensambladas a la prime|ra y segunda secciones de base 50 y 52. Una perilla de rotación 60 tiene una superficie interior 62 que se I extiende completamente a través del mismo para el acoplamiento y rotación ! de la porción de implementación 22 alrededor de su eje longitudinal. La perilla | de rotación 60 incluye una saliente protuberante hacia adentro 64 que se extiende a lo largo de por lo menos una porción de la superficie interior 62. La saliente protuberante 64 es recibida dentro de una ranura longitudinal 66 formada en una porción proximal del casquillo de cierre 32 para que una rotación de la perilla de rotación 60 lleve a cabo la rotación dél casquillo de cierre 32. Se observará que la saliente 64 además se extiende a través del bastidor 34 y entra en contacto con una porción del elemento de impulso de accionamiento 36 para llevar a cabo igualmente su rotación. Así, el efector de extremo 12 (que no se muestra en las figuras 6-9) gira con la perilla de rotación 60. ¡ Un extremo proximal 68 del bastidor 34 pasa proximalmente a través de la perilla de rotación 60 y está provisto con Juna muesca circunferencial 70 que se acopla mediante elementos de sujeción de canal opuestos 72 que se extienden respectivamente desde las secciones de base 50 y 52. Se muestra únicamente los elementos de sujeción de Canal 72 de la I segunda sección de base 52. Los elementos de sujeción de ca al 72 que se extienden desde las secciones de base 50, 52 sirven para afianzar el bastidor 34 A la porción de manija 20 para que el bastidor 34 no se mueva I longitudinalmente en relación con la porción de manija 20. | I El gatillo de cierre 26 tiene una sección de manija 74, una i sección de segmento de engrane 76 y una sección intermedia 78. Una i superficie interior 80 se extiende a través de la sección intermedia 78. Un elemento de soporte cilindrico 82 que se extiende desde la segunda sección i de base 52 pasa a través de la superficie interior 80 para; montar con movimiento de pivote el gatillo de cierre 26 sobre la porción de manija 20. Un j j ! segundo elemento de soporte cilindrico 83 que se extiende desde la segunda sección de base 52 pasa a través de una superficie interior 81 del gatillo de accionamiento 28 para montarse sobre un pivote en la porción; de manija 20.
Se provee una abertura hexagonal 84 en el elemento de soporte cilindrico 83 para recibir un pasador de sujeción (que no se muestra) que se extiende desde la primera sección de base 50.
Una horquilla de cierre 86 está alojada dentro de{ la porción de manija 20 para el movimiento alternado dentro de la misma y sirve para transferir el movimiento del gatillo de cierre 26 al casquillo de cierre 32. Los elementos de soporte 88 que se extienden desde la segunda sección de base 52 y el elemento de sujeción 72, el cual se extiende a través dé un hueco 89 ¡ en la horquilla 86, da soporte a la horquilla 86 dentro de la porción de manija ! 20. j Se provee un extremo proximal 90 del casquillo dé cierre 32 con ¡ una pestaña 92 que ajusta mediante resorte en un hueco de; recepción 94 ¡ formado en un extremo distal 96 de la horquilla 86. Un extremo proximal 98 de la horquilla 86 tiene una cremallera de engranes 100 que está acoplada mediante la sección de segmento de engrane 76 del gatillo Ide cierre 26.
Cuando el gatillo de cierre 26 se mueve hacia el mango de pistola 24 de la porción de manija 20, la horquilla 86 y, por ende, el casquillo dé cierre 32 se mueven distalmente, comprimiendo un resorte 102 que desplaza proximalmente a la horquilla 86. El movimiento distal del casquillo de cierre 32 lleva a cabo el movimiento de traslación con efecto de pivote dej la quijada fija 18 distalmente y hacia el canal alargado 16 del efector de extremo 12 y el movimiento proximal lleva a cabo el cierre, como se discute a continuación. ? El gatillo de cierre 26 es desplazado hacia adelante a una i posición de abierto mediante una superficie frontal 130 que ínter-actúa con Una superficie de acoplamiento 128 del gatillo de accionamiento 28. Un primer gancho de prensado 104 que tiene efecto de pivote de arriba hacia la parte posterior en la porción de manija 20 alrededor de un pasador 106 restringe el movimiento del gatillo de accionamiento 28 hacia el mango de pistola 24 hasta que el gatillo de cierre 26 esté prensado en su posición de cierre. El gancho 104 restringe el movimiento del gatillo de accionamiento 28 al acoplar un pasador de cierre 107 en el gatillo de accionamiento 28. E gancho 104 también está en contacto con el gatillo de cierre 26. En particular, una proyección hacia delante 108 del gancho 104 acopla un elemento 1 10 en la sección intermedia 78 del gatillo de cierre 26, el elemento 1 10 está hacia fuera de la superficie interior 80 hacia la sección de manija 74. Se desplaza el gancho 104 hacia el contacto con el elemento 1 10 del gatillo de cierre 26 y el acoplamiento con el pasador de cierre 107 en el gatillo de accionamiento 28 mediante un resorte de liberación 1 12. A medida que se oprime el gatillo de cierre 26, el gancho 104 se mueve de arriba hacia la parte posterior, comprimiendo el resorte de liberación 1 12 que está capturaclo entre una proyección hacia atrás 1 14 en el gancho 104 y una proyección ¡hacia delante 1 16 en el botón de liberación 30. engranes 141 , 142. Durante el movimiento de retorno del gatillo de muesca en un extremo prox ma el v stago de impulso de metal 140 para bloquear el vástago de impulso de metal 140 con el brazo de trinquete superior 1 18 del botón de liberación 30 en su posición no accionada.
El multiplicador 136 comprende un primer y segundo engrane de ! piñón integral 1 50 y 152. El primer engrane de piñón integral 1 50 está acoplado con una primera cremallera de engrane 154 provista en el vástago de impuso de metal 140. El segundo engrane de piñón integral 1 52 está acoplado con la primera cremallera de engrane 141 en el elemerjto de impulso ¡ 138. El primer engrane de piñón integral 150 tiene un primer jdiámetro y el í segundo engrane de piñón integral 152 tiene un segundo diájnetro que es más pequeño que el primer diámetro. '-, Las figuras 6, 8 y 9 ¡lustran respectivamente la porción de manija 20 en la posición de inicio (abierta y sin accionar), una posición de prensado (cerrada y sin accionar) y una posición accionada. Se provee el gatillo de i accionamiento 28 con una sección de segmento de engrane 15¡6. La sección de segmento de engrane 156 se acopla con la segunda cremallera de engrane 142 en el elemento de impulso 138 para que el movimiento del gatillo ! de accionamiento 28 haga que el elemento de impulso 138 se |mueva hacia atrás y hacia delante entre una primera posición de impulso, que se muestra en la figura 8, y una segunda posición de impulso, que se muestra en la figura 9. Para prevenir el accionamiento de la grapa antes de que haya ocurrido el prensado del tejido, el brazo de trinquete superior 1 18 en el botón de liberación 30 se acopla con la segunda muesca 148 en el| elemento de j impulso 138 para que el vastago de impulso de metal 140 sea ¡bloqueado en ¡ su posición más proximal, como se ilustra en la figura 6. Cuando el brazo de trinquete superior 1 18 cae en el hueco 122, el brazo de trinquete superior 1 18 se desacopla con la segunda muesca 148 para permitir el movimiento distal del vástago de impulso de metal 140, como se ilustra en la figura 9.
Ya que la primera cremallera de engrane 141 en e'l elemento de impulso 138 y la cremallera de engrane 154 en el vástago de impulso de metal 140 están acopladas con el multiplicador 136, el movimiento del gatillo de accionamiento 28 ocasiona que el vástago de impulso de metal 140 se alterne i entre una primera posición alternante, que se muestra en la figura 8, y una segunda posición alternante, que se muestra en la figura 9. Ya que el diámetro del primer engrane de piñón 150 es mayor del diámetro que el segundo engrane de piñón 152, el multiplicador 136 mueve la sección alternante 134 una distancia mayor que el elemento de impulso 138 que es movido por el gatillo de accionamiento 28. Se pueden cambiar los diámetros del primer y segundo engranes de piñón 150 y 152 para permitir la variación en la longitud de la carrera del gatillo de accionamiento 28 y la fuerza requerida para moverlo. ! Se apreciará que la porción de manija 20 es ilustrativa y que se í pueden emplear otros mecanismos de activación. Por ejemplo, se pueden generar los movimientos de cierre y accionamiento por medios automatizados. ! EFECTOR DE EXTREMO CON CIERRE Y ACCIONAMIENTO éEPARADO Y I DISTINTO i El efector de extremo 12 del instrumento ¿juirúrgico de engrapado y corte 10 se ilustra con mayor detalle en las figuras 10-16. Como j se describe anteriormente, la porción de manija 20 produce movimientos separados y distintos de cierre y accionamiento que activan el efector de extremo 12. El efector de extremo 12 mantiene convenientemente la flexibilidad clínica de este cierre y accionamiento separado y distinto (es decir, engrapado y corte). Adicionalmente, el efector de extremo 12 introduce la capacidad mencionada anteriormente para mantener de manera afirmativa la separación cerrada durante el accionamiento después de que el clínico coloca Í y prensa el tejido. Ambas características mejoran la capacidad tanto en el j procedimiento y estructu raímente del instrumento quirúrgico de engrapado y i corte 10 al asegurar una separación adecuada para casos en los que se prense una cantidad más bien inadecuada de tejido y para mejorar el prensado en casos en el que se haya prensado una cantidad más bien excesiva de tejido.
I La figura 10 ilustra el efector de extremo 12, el cual está en una posición abierta mediante un casquiilo de cierre retraído 32, con un cartucho de grapas 37 instalada en el canal alargado 16. En una superficie inferior 200 de la quijada fija, está dispuesta una pluralidad de cavidades para formación de engrapado 202 para que correspondan a una pluralidad dé aperturas de i engrapadora 204 en una superficie superior 206 del cartucho deigrapas 37. La j barra de accionamiento 14 está en su posición proximal, con el pasador superior 38 alineado de manera que no interfiera con la cavidad de la quijada fija 40. La cavidad de quijada fija 40 se muestra en comunicación con la ranura de quijada fija longitudinal 42 en la quijada fija 18. El borde de cortes presentado distalmente 48 de la barra de accionamiento 14 está alineado con y proximalmente de ser removida en la ranura vertical 49 en la de cartucho de grapas 37, permitiendo así la remoción de un cartucho gastado! y la inserción de un cartucho sin accionar, el cual ajusta mediante resorté en el canal i alargado 16. Específicamente, las características de extensión! 208, 210 del cartucho de grapas 37 acopla los huecos 212, 214 (que se muestran en la figura 12) del canal alargado 16. ! i La figura 11 muestra la porción de ¡mplementación 22 del instrumento quirúrgico de engrapado y corte 10 en su forma desensamblada. Se muestra que el cartucho de grapas 37 comprende un cuerpo de cartucho Í 216, una corredera de cuña 218, impulsores individuales y dobles 220, grapas 222 y una bandeja para cartucho 224. Cuando se ensambla, la jbandeja para quijada fija 18 para llevar a cabo y la abertura y cierre de la quijada fija 18. Se muestra al elemento de impulso de accionamiento 36 como ensamblado a partir de la barra de accionamiento 14 unida a un conector de accionamiento ¡ 238 mediante pasadores 240, los cuales a su vez están unidlos de manera girable y próxima al vastago de impulso de metal 140. Se guía la barra de accionamiento 14 a un extremo distal del bastidor mediante unajguía ranurada 239 insertada en el mismo.
Con referencia particular a la figura 12, se remueve una porción i del cartucho de grapas 37 para exponer las porciones del canal alargado 16, como los huecos 212, 214 y para exponer algunos componente|s del cartucho de grapas 37 en su posición no accionada. En particular, iel cuerpo de cartucho 216 (mostrado en la figura 1 1 ) se ha retirado. La corredera de cuña 218 se muestra en su posición proximal no accionada con un bloque de empuje 242 que hace contacto con el pasador medio 46 (que no se muestra en la figura 12) de la barra de accionamiento 14. La correderá de cuña 218 ? está en contacto deslizante longitudinal sobre la bandeja de cartuchos 224 e Í incluye cuñas 228 que fuerzan ascendentemente los impulsores!individuales y i dobles 220 a medida que la corredera de cuñas 218 se mueve distalmente. i Las grapas 222 (que no se muestran en la figura 12) que reposan sobre los impulsores 220 también son forzados así ascendentemente para entrar en contacto con las cavidades de formación de la quijada fija 202 jen la quijada fija 18 para formar grapas cerradas. También se ilustra la ranura de canal 45 en el canal alargado 16 está alineado con la ranura vertical 49 én el cartucho de grapas 37. I i La figura 13 ilustra el efector de extremo 12 de laj figura 12 con todo el cartucho de grapas 37 removido para mostrar el pasadór medio 46 de la barra de accionamiento 14 así como la porción del canaj alargado 16 removido adyacente a la ranura de canal 45 para exponer la tapa de la barra de accionamiento 44. Adicionalmente, se remueven porciones de la flecha 23 para exponer una porción proximal de la barra de accionamiento 14.
Proyectándose descendentemente desde la quijada fija 18 cerca del pivote, un par de topes de tejidos opuestos 244 previenen que el tejido¡ se posicione demasiado lejos hacia arriba en el efector de extremo 12 durante el prensado.
La figura 14 ilustra el efector de extremo 12 cejrrado en una posición de prensado de tejido con la barra de accionamiento 14 sin accionar. ! El pasador superior 38 está en la cavidad de la quijada fija 40 alineado I verticalmente con la ranura de quijada fija 42 para el movimiento longitudinal distal de la barra de accionamiento 14 durante el accionamiento. El pasador medio 46 está posicionado para empujar la corredera de cuña 218 distalmente para que la cuña 228 haga contacto secuencialmente y levante los impulsores dobles 220 y las grapas correspondientes 222 en contacto de formación con las cavidades de formación de grapa 202 en la superficie inferior 200 de la i quijada fija 18. j ! La figura 15 ilustra la superficie superior 206 dej cartucho de grapas 37 con la barra de accionamiento 14 en su posición no accionada y ¡ proximal. Las aperturas de la engrapadora 204 están dispuestas a cada costado de la ranura vertical 49 en el cartucho de grapas 37. \ La figura 16 ilustra el efector de extremo 12 cerca del pivote que muestra que el canal alargado 16 tiene porciones de superficie inclinada opuestas 246 para cooperar así con los topes de tejido 248 de la quijada fija 18 (que no se muestran en la figura 16) para prevenir que el tejido se atore en el efector de extremo 12. También ilustrado a mayor de' alie, son los impulsores dobles 220 y su relación con las grapas 222.
OPERACION En su uso, se utiliza el instrumento quirúrgico de engrapado y corte 10 como se ilustra en las figuras 1 , 2 y 17-23. En las iguras 1 -2, el instrumento 10 está en su posición de inicio, con un cartucho de grapas totalmente cargado y sin accionar 37 ajustado mediante resorte en el extremo distal del canal alargado 16. Ambos gatillos 26, 28 están hacia delante y el efector de extremo 12 está abierto, como sería típico después de insertar el efector de extremo 12 a través de un trocar u otro abertura en una cavidad del cuerpo. Posteriormente el clínico manipula el instrumento 10 para que el tejido 248 a ser engrapado y cortado esté posicionado entre el cartucho de grapas y la quijada fija 18, como se ilustra en la figura 17. Con referencia a las figuras 18-19, a continuación el clínico mueve el gatillo de cierre 26 proximalmente hasta que esté posicionado directamente adyacente al mango de pistola 24, bloqueando a porción de manija 20 en la posición cerrada y de prensado. La barra de accionamiento Con referencia a las figuras 22-23, el clínico continua moviendo el gatillo de accionamiento 28 hasta que queda próximo al gatil o de cierre 26 y mango de pistola 24. En ese punto¿ todos los extremos de las grapas 222 se doblan como resultado de su acoplamiento con la quijada fija 18 La tapa de la barra de accionamiento 44 se detiene contra un tope de una barra de i accionamiento 250 que se proyecta hacia el extremo distal de la ranura de canal 45. El borde de corte 48 ha atravesado completamente el tejido. Este procedimiento se completa al liberar el gatillo de accionamiento; 28 y luego al oprimir el botón de liberación 30 y simultáneamente apretandó el gatillo de cierre 26 para que abra el efector de extremo 12. Aunque se ha ilustrado la presente Invención mediante la descripción de diversas modalidades y aunque las modalidades ilustrativas han sido descritas en un detalle considerable, no es la intención del solicitante restringir o en modo alguno limitar el alcance de las reivindicaciones adjuntas a dicho detalle. Serán evidentes fácilmente ventajas modificaciones adicionales para los expertos en la técnica. Por ejemplo, la separación afirmativa de la quijada fija 18 y el canal alargado 16 se logra en parte con dos pasadores 44, 46 en la barra de accionamiento 14 que acopla los costados opuestos de una ranura de canal 47 y un pasador superior individual 38 atrapado dentro de una ranura de quijada fija 42. Sería consistente con aspectos de la invención que la quijada fija estuviera capturada mediante pasadores opuestos en ambos costados de una ranura longitudinal y/o que un canal alargado tenga una ranura interna ? que atrape un pasador inferior. \ Para otro ejemplo, aunque la vigueta de accionamiento de ! vigueta en E 14 tiene ventajas para un instrumento quirúrgico de corte y i engrapado que se emplee endoscópicamente 10, se puede utilizar una vigueta en E en otros procedimientos clínicos. Es aceptación común que los I l procedimientos endoscópicos son más comunes que los procedimientos laparoscópicos. En consecuencia, se ha discutido la presentej invención en términos de procedimientos y aparatos endoscópicos. Sin embargo, el uso en la presente de términos como "endoscópicos" no debe ser interpretado como límite de la presente invención para un instrumento quirúrgico dé engrapado y corte que se utilice únicamente junto con un tubo endoscópico (es decir, trocar). Por el contrario, se piensa que la presente invención puede ser utilizada en cualquier procedimiento en el que el acceso es lijmitado a una incisión pequeña, incluyendo pero no limitado a procedimientos laparoscópicos, así como a procedimientos abiertos. I Para otro ejemplo, aunque un clínico opera manüalmente una i porción de manija ilustrativa 20 que se describe en la presente, de Como un ejemplo adicional, aunque se ilustra en a presente un instrumento simultáneo de engrapado y corte, sería consistente] con aspectos de la invención que el engrapado comprendiera otros tipos de sujetadores y técnicas de unión.

Claims (10)

t 36 NOVEDAD DE LA INVENCION REIVINDICACIONES
1.- Un instrumento quirúrgico que comprende: u a porción de manija operable para producir un movimiento de accionamiento; una porción ¡ I de implementación que responde a los movimientos de accionamiento de la porción de manija, y la porción de implementación comprende: un canal alargado acoplado a la porción de manija y que incluye una ranura de canal, í un cartucho de grapas que es recibido por el canal alargado, y que incorpora un elemento de cuña proximalmente colocado alineado para accionar en leva de manera ascendente un impulsor que soporta una grapa, ur¡ia quijada fija acoplada mediante efecto de pivote al canal alargado y que incluye un canal de quijada fija, un dispositivo de accionamiento que incluye un tjorde de corte i distalmente presentado longitudinalmente recibido entre en canal alargado y la quijada fija, un elemento superior que se acopla al canal de quijada fija, a un elemento inferior que se acopla con la ranura de canal, y un elemento medio ¦ I operable para accionar el cartucho de grapas al trasladar distalmente el elemento de cuña del cartucho de grapas. ¡
2.- El instrumento quirúrgico de conformidad con la reivindicación 1 , caracterizado además porque la quijada fija forma 'una relación i internamente desviada con el canal alargado configurada para ayudar al dispositivo de accionamiento a separarse afirmativamente entre la quijada fija y el canal alargado durante accionamiento del cartucho de grapas.
3. - El instrumento quirúrgico de conformidad con la reivindicación 1 , caracterizado además porque el cartucho de grapas es un tipo seleccionado de una pluralidad de tipos de cartucho de grapas!, cada tipo de cartucho de grapas caracterizado por un grosor seleccionado para una separación deseada entre la quijada fija y el canal alargado caracterizado por grapas que tienen una longitud adecuada para la separación deseada.
4. - El instrumento quirúrgico de conformidad con la reivindicación 3, caracterizado además porque la corredera de cuña comprende una pluralidad de cuñas en leva conectadas cada una teniendo una altura preseleccionada configurada para el tipo seleccionado de cartucho de grapas, el elemento medio del dispositivo de accionamiento está orientado para soportar cada uno de la pluralidad de tipos de cartucho de grapas.
5.- Un instrumento quirúrgico que comprende: una porción de manija operable para producir un movimiento de accionamiento y un movimiento de cierre; una porción de implementación que responde a los movimientos de accionamiento de la porción de manija, y diametralmente dimensionada para uso endoquirúrgico, la porción de implementación comprende: una flecha acoplada a la porción de manija operable para transferir por separado el movimiento de accionamiento y el njiovimiento de cierre; un canal alargado acoplado a la flecha y que incluye una ranura de ¡ canal, una quijada fija acoplada en pivote al canal alargado, qué responde al movimiento de cierre de la flecha, y que incluye un canal de quijada fija, un dispositivo de accionamiento que incluye un borde de cort|e presentado distalmente que es recibido longitudinalmente entre el canal ¡alargado y la I quijada fija, el dispositivo de accionamiento configurado para separar afirmativamente la quijada fija del canal alargado durante desplazamiento í ! longitudinal entre la quijada fija y el canal alargado. | ¡
6. - El instrumento quirúrgico de conformidad con la| reivindicación 5, caracterizado además porque comprende adicionalmente up cartucho de grapas acoplado por el canal alargado y que incluye una ranura proximalmente abierta para recibir el borde de corte del dispositivo de accionamiento, el cartucho de grapas incluye una pluralidad de grapas accionadas en leva de manera ascendente a través del movimiento longitudinal distal del mecanismo de accionamiento. !
7. - El instrumento quirúrgico de conformidad con la¡reivindicación Í 6, caracterizado además porque el cartucho de grapas incluye a'dicionalmente una pluralidad de impulsores que soportan la pluralidad de grapas y una ¡ corredera de cuña que responde al movimiento longitudinal distal del mecanismo de accionamiento para accionar en leva de manera ascendente los impulsores y formar así la pluralidad de grapas contra la quijada fija.
8.- El instrumento quirúrgico de conformidad con la ¡reivindicación 6, caracterizado además porque la quijada fija forma juna relación internamente desviada con el canal alargado configurada para ayudar al dispositivo de accionamiento a separarse afirmativamente entre la quijada fija y el canal alargado durante accionamiento del cartucho de grapas.
9. - El instrumento quirúrgico de conformidad con la reivindicación 6, caracterizado además porque el cartucho de grapas es un tipo seleccionado de una pluralidad de tipos de cartucho de grapas cada tipo de cartucho de grapas caracterizado por un grosor seleccionado para una separación deseada entre la quijada fija y el canal alargado caracterizado por grapas que tienen una longitud adecuada para la separación deseada.
10. - El instrumento quirúrgico de conformidad con la reivindicación 9, caracterizado además porque la corredera de cuña comprende una pluralidad de cuñas en leva conectadas cada una teniendo una altura preseleccionada configurada para el tipo seleccionado de cartucho de grapas, el elemento medio del dispositivo de accionamiento está orientado para soportar cada uno de la pluralidad de tipos de cartucho de grapas. 1 1 .- Un instrumento quirúrgico, que comprende un medio de manija para producir un movimiento de cierre y un movimiento de accionamiento; un medio de prensado que responde al movimiento de cierre para prensar tejido; un medio de accionamiento que responde al movimiento de accionamiento para separar verticalmente el medio de prensado y para ocasionar en el mismo el corte y engrapado de tejido prensado. I
MXPA04004891A 2003-05-20 2004-05-20 Instrumento quirurgico de engrapado que incorpora un mecanismo de accionamiento de vigueta en e. MXPA04004891A (es)

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US10/443,617 US6978921B2 (en) 2003-05-20 2003-05-20 Surgical stapling instrument incorporating an E-beam firing mechanism
US10/441,632 US7000818B2 (en) 2003-05-20 2003-05-20 Surgical stapling instrument having separate distinct closing and firing systems

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MXPA04004891A true MXPA04004891A (es) 2005-04-11

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MXPA04004891A MXPA04004891A (es) 2003-05-20 2004-05-20 Instrumento quirurgico de engrapado que incorpora un mecanismo de accionamiento de vigueta en e.

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US (3) US6978921B2 (es)
EP (2) EP1479346B8 (es)
JP (2) JP4841811B2 (es)
AT (1) ATE383113T1 (es)
AU (4) AU2004202108A1 (es)
CA (2) CA2467795C (es)
DE (2) DE602004004194T2 (es)
ES (2) ES2298687T3 (es)
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US20060180634A1 (en) 2006-08-17
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