MXPA04004888A - Instrumento de engrapado quirurgico que cuenta con una inmovilizacion contra accionamiento para una quijada fija no cerrada. - Google Patents

Instrumento de engrapado quirurgico que cuenta con una inmovilizacion contra accionamiento para una quijada fija no cerrada.

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MXPA04004888A
MXPA04004888A MXPA04004888A MXPA04004888A MXPA04004888A MX PA04004888 A MXPA04004888 A MX PA04004888A MX PA04004888 A MXPA04004888 A MX PA04004888A MX PA04004888 A MXPA04004888 A MX PA04004888A MX PA04004888 A MXPA04004888 A MX PA04004888A
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fixed jaw
channel
surgical instrument
actuator
further characterized
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MXPA04004888A
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English (en)
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William Bruce Ii Weisenburgh
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Johnson & Johnson
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • 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, e.g. tourniquets
    • 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, e.g. tourniquets
    • 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
    • A61B2017/0725Stapler heads with settable gap between anvil and cartridge, e.g. for different staple heights at different shots
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • 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)

Abstract

Un instrumento quirurgico para procedimientos medicos laparoscopcos y endoscopicos corta y engrapa simultaneamente tejido prensado en un efector de extremo que comprende un canal alargado, el cual mantiene un cartucho de grapas y una quijada fija unida mediante efecto de pivote; una barra de accionamiento con vigueta en E acopla el canal y acopla selectivamente la quijada fija durante movimientos de accionamiento distal, en donde le tejido es cortado y engrapado mediante impulso ascendente a partir del cartucho de grapa para que se forme contra la quijada fija; en particular se desacopla un pasador superior de la barra de accionamiento a partir de la quijada fija antes del accionamiento; una transicion inclinada desde una quijada fija a un a ranura de quijada fija evita el accionamiento equivocado cuando el efector de extremo ha prensado demasiado tejido, pero simultaneamente ayuda a prensar con exito una cantidad ligeramente excesiva de tejido.

Description

INSTRUMENTO DE ENGRAPADO QUIRURGICO QUE CUENTA CON UNA I INMOVILIZACION CONTRA ACCIONAMIENTO PARA UNA QUIJADA FIJA NO CERRADA REFERENCIA CRUZADA A SOLICITUDES RELACIONADAS La presente solicitud está relacionada con las cuatro solicitudes copendientes y de propiedad común presentadas en la misma fecha con la presente, descripciones de las cuales se incorporan a la presente mediante referencia a su totalidad y tales cuatro solicitudes están tituladas respectivamente como sigue: í (1 ) "SURGICAL STAPLING INSTRU ENT HAVING A SINGLE LOCKOUT MECHANIS FOR PREVENTION OF FIRING" a Frederick E.
Shelton IV, Mike Setser, y Bruce Weisenburgh; f 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 grapas y, en lo particular, a mejoras relacionadas con instrumentos de engrapadoras y mejoras en los procedimientos para formar diversos componentes de tales instrumentos de engrapadora.
ANTECEDIENTES DE LA INVENCION Se han utilizado en la técnica antecedente engrapadoras i quirúrgicas para hacer una incisión longitudinal en el tejido y simultáneamente aplicar líneas de grapas en costados opuestos de la incisión. Tales instrumentos incluyen por lo general un par de elementos de mordaza cooperantes que, si el instrumento tiene el propósito de aplicaciones endoscópicas o laparoscópícas, son capaces de pasar a través de un paso de cánula. Uno de los elementos de mordaza recibe un cartucho de grapas que tiene por lo menos dos filas de grapas lateralmente separadas. El otro elemento de mordaza define una quijada fija que tiene cavidades para formación 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, Se describe en l 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 médico es capaz de cerrar los elementos de mordaza sobre el tejido para colocar el tejido previo a su accionamiento. Una vez que el médico determinado que elementos de mordaza están agarrando apropiadamente el tejido, el médico puede entonces accionar la engrapadora quirúrgica, cortando y engrapando ahí 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 médico 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 así grapas cerradas en el tejido cortado. Aún más, una barra de accionamiento que atraviese entre mordazas opuestas para cortar el tejido y para impulsar las cuñas que impulsan las grapas puede enfrentar resistencia debido a las mordazas oplestas comprimidas. Por otro lado, prensar demasiado tejido puede crear. problemas similares. El borde de corte puede cortar de manera incompleta el tejido y/o las grapas no se forman completamente. Basarse en la verificación endoscópica del prensado apropiado puede ser indeseaJle o inefectivo en todos los casos para detectar si se ha prensado demasiado o poco tejido. 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 entre las mordazas opuestas durante el accionamiento para prevenir el corte y engrapado totales al menos que el grosor sea el apropiado para asegurar una operación efectiva. En consecuencia, existe una necesidad importante de un instrumento quirúrgico de en Igrapado y corte mejorado que mantenga una separación adecuada en su efector de extremo para lograr un engrapado apropiado del tejido cortado que prevenga el accionamiento (es decir, corte y engrapado) cuando las mordazas opuestas no estén cerradas.
BREVE DESCRIPCION DE LA INVENCION La invención supera las deficiencias anteriores y otras de la técnica antecedente al proveer un mecanismo de accionamiento que está extendido distalmente dentro de un efector de extremo de un instrumento quirúrgico de engrapado y corte. El efector de extremo cierra y prensa el tejido de manera separada al accionamiento (es decir, el corte y engrapado) proporcionando flexibilidad clínica. Y sin embargo, el mecanismo accionamiento acopla de manera firme el efector de extremo durante el accionamiento para asegurar I la separación apropiada y lograr un corte apropiado y la formación de la grapa. Este acoplamiento selectivo del efector de extremo mediante el mecanismo de accionamiento mejora con un mecanismo de cierre de quijada fija que previene los casos en los que la quijada fija no está cerrada adecuadamente para asegurar una separación apropiada del efector de extremo. En un aspecto de la invención, un instrumento quirúrgico incluye una porción de manija que es operable para producir un movimiento de accionamiento que activa una porción de ¡mplementación. Esta porción de implementación tiene un canal alargado que recibe un cartucho de grapa opuesto a una quijada fija unida con efecto de pivote. Un mecanismo de accionamiento acopla el cana alargado a lo largo de su longitud longitudinal durante el accionamiento. El mecanismo de accionamiento acopla de manera selectiva la quijada fija con un mecanismo de inmovilización de quijada fija. La porción de superficie inclinada embotada incluye convenientemente una porción con superficie inclinada que hace la transición del dispositivo superior del mecanismo de accionamiento en una ranura de quijada fija cuando un ligero sobrante de tejido prensado puede ser superado por la capacidad de separación afirmativa del mecanismo de accionamiento. Así, se permite al instrumento ser accionado únicamente cuando la cantidad de tejido prensado está dentro de una escala deseada qué asegure un corte y engrapado apropiados. En otro aspecto de la invención, la porción de manija produce un movimiento de cierre separado y un movimiento de accionamiento separado. La quijada fija además incluye un hueco que permite al dispositivo de accionamiento ser desacoplado de la quijada fija mientras la quijada fija responde al movimiento de cierre. El mecanismo de inmovilización de quijada fija está posicionado entre el lueco de la quijada fija de un canal de quijada fija para que se acople selectivamente un elemento superior del dispositivo de accionamiento. En un aspecto adicional de la invención, la porción de Implementación de un efector de extremo y flecha tienen la magnitud para ser utilizados a través de un paso de cánula. El efector de extremo responde de manera separada a los movimientos de cierre y accionamiento de la porción de manija. Un mecanismo de inmovilización de quijada fija del efector de extremo evita el movimiento distal del dispositivo de accionamiento cuando existe una condición de abierto I de la quijada fija. Serán evidentes éstos y otros objetivos y ventajas de la presente invención a partir de los dibujos adjuntos y la descripción de los mismos.
BREVE DESCRIPCION DE LOS DIBUJOS Los dibujos adjuntos, que se incorporan y son parte de esta especificación, ilustran modalidades de la invención y, junto con la descripción general de la invención dada anteriormente y la descripción detallada de las modalidades dadas a continuación, sirven para explicar los principios de la presente invención. 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 ilus; ra una vista a 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 engrapado y corte de la figura 2. La figura 4 ¡lustra una vista frontal aumentada de la barra de accionamiento del instrumento quirúrgico de engrapado y corte de la figura 2. La figura 5 ¡lus¡ tra una vista a detalle 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 ilustra 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 eos ado 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 despiece 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 de la 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 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 ("accionado"). La figura 10 ilustra 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 hacia arriba o abierta que expone el cartucho de engrapas y el borde de corte de la barra de accionamiento. La figura 11 ilustra una vista en despiece isométrica de la porción de implementación del instrumento quirúrgico de engrapado y corte de la figura 1.
La figura 12 ilustra una vista isométrica del efector de extremo en el extremo distal del ¡nstrumen :o quirúrgico de engrapado y corte de la figura 1 con la quijada fija en la posición arriba o abierta con el cartucho removido que expone un impulsor de grapas I 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 arriba o abieija con el cartucho de grapas completamente removido y una porción de jun canal alargado removido para exponer el pasador más inferior de la barra de accionamiento. La figura 14 ilustra una vista en elevación lateral en sección que 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 de las lineas 14-14 de la figura 10 para exponer la corredera de cuña, los impulsores de grapas y las grapas pero que también ¡lustra la barra de accionamiento a lo largo de las líneas central longitudinal. La figura 15 ilustra una vista en sección del efector 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. La figura 17 ilustra una vista en sección en elevación lateral del instrumento quirúrgico de eng Irapado y corte de la figura 1 tomado a lo largo de la línea central longitudinal del efector de extremo en una posición parcialmente cerrada pero sin prensar tejido para agarre. 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 ¡lustra 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 prensado 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. los beneficios únicos de la presente iipvención. El instrumento quirúrgico de engrapado y corte 10 incorpora un efelctor dé extremo 12 que cuenta con un mecanismo de accionamiento de viguéta en E ("barra de accionamiento") 14 que controlan convenientemente la separación del efector de extremo 12. En particular, se mantiene un canal alargado 16 y una quijada fija trasladable con efecto de pivote 18 en una separación que asegura un engrapado y corte efectivos. Adicionalmente, se evita el accionamiento si la quijada fija 18 no está cerrada adecuadamente con un mecanismo de inmovilización de quijada fija, lo cual se describe en mayor detalle a continuación. El instrumento quirúrgico |y de engrapado y corte 10 incluye una porción de manija 20 conectada a unal porción de implementación 22, y esta última además comprende una flecha 23 que termina distalmente en el efector de extremo 12. La porción de manija 23 incluye un mango de pistola 24 hacia al cual el médico atrae con efecto de pivote un gatillo de cierre 26 para ocasionar el prensado o cierre de la qu ijada fija 18 hacia el canal alargado 16 del efector de extremo 12. Un ga ¡lio de accionamiento 28 está más externamente hacia fuera del gatillo de cierre 26 y que el médico atrae con efecto de pivote para efectuar el engrapado y corte del tejido prensado en el efector de extremo 12. Se observará que los térrhinos "proximal" y "distar se utilizan en la presente con referencia a un módico que agarra una manija de un instrumento. Así, el efector de extreme 12 es distal con respecto a la porción de manija más próxima 20. Se obser ará adicionalmente que por motivo de conveniencia y claridad, se utilizan e la presente los términos de espacio como "vertical" y "horizontal" con respecto a los dibujos. Sin embargo, los instrumentos quirúrgicos se utilizan erlt muchas orientaciones y posiciones y no se pretende que estos términos seah restrictivos y absolutos. El gatillo de cierre 26 se acciona primero. Una vez que el médico está satisfecho con el posicionamientó del efector de extremo 12, el médico puede retraer el gatillo de cierre a su posición totalmente cerrada y bloqueada próxima al mango de pistola 24. Posteriormente, se acciona el gatillo de accionamiento 28. El gatillo pe accionamiento 28 retorna mediante acción de resorte cuando el médico retira la presión. Cuando se oprime un botón de liberación 30 en el extremo proximal de la porción de manija 20, libera cualquier gatillo de cierre bloqueado 26 Un casquillo de cierre 32 rodea un bastidor 34, el cual a su vez rodea a un elemento de impulso de ac:¡onamiento 36 que es posicionado por el gatillo de accionamiento 28. El basti dor 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 ilus tra, 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 accionamien| o 14 para impulsar 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 moldean a partir de un material polimérico como un policarbonato llenado con vidrio. La primera sección de base 50 está provista con una pluralidad de pasadores de forma cilindrica 54. La sogunda sección de base 52 incluye una pluralidad de elementos de extensión 56 que tiene cada uno 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] ensamblados a la primera y segunda secciones de base 50 y 52. Una perilla de rotación 60 tiene un barreno 62 que se extiende completamente a través del mismo para acoplar y rotar la porción de implementación 22 alrededor de su eje longitudinal. La perilla de rotación 60 incluye una saliente protuberante hacia dentro 64 que se extiende a lo largo de por lo menos una porción del barreno 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 urta rotación de la perilla de rotación 60 lleve a cabo la rotación del casquillo dd 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 6 y está provisto con una muesca circunferencial 70 que se acopla mee ¡ante elementos de sujeción de canal opuestos 72 que se extienden respect vamente desde las secciones de base 52. Se muestra únicamente el e emento de sujeción de canal 72 de la segunda sección de base 52. Los eleifientos de sujeción de canal 62 que se extienden desde las secciones de basé 50, 52 sirven para afianzar el bastidor 34 de la porción de manija 20 pa ifa que el bastidor 34 no se mueva longitudinalmente en relación con la porción de manija 20. El gatillo de cierre 26 t eñe una sección de manija 74, una sección de segmento de engrane 76 y una sección intermedia 78. Un barreno 80 se extiende a través de la sección ntermedia 78. Un elemento de soporte cilindrico 82 que se extiende desde leí segunda sección de base 52 pasa a través del barreno 80 para montar con efecto de pivote el gatillo de cierre 26 sobre la porción de manija 20. Un segjndo elemento de soporte cilindrico 83 que se extiende desde la segunda se ión de base 52 pasa a través de un barreno 81 del gatillo de accionamiento 28 para montarse con efecto de 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 rimera sección de base 50. Una horquilla de cierre 83 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 de un hueco 89 en la horquilla 86, da soporte a la horquilla 86 dentro de la porción de manija 20. Se provee un extremo praxi mal 90 del casquillo de cierre 32 con una pestaña 92 que ajusta mediante resorte en un hueco de recepción 94 formado en un extremo distal 96 de la Ijiorquilla 86. Un extremo proximal 98 de la horquilla 86 tiene una cremallera de engrane 100 que está acoplada mediante la sección de segmento dej engrane 76 del gatillo de cierre 26. Cuando el gatillo de cierre 26 se mueN/e hacia el mando de pistola 24 de la porción de manija 20, la horquilla 86 y, por ende, del casquillo de cierre 32 se mueven distalmente, comprimiendo un resorte 102 que desvía proximalmente a la horquilla 86. El movimiento distal del casquillo de cierre 32 lleva a cabo el movimiento de traslación con efecto de! pivote de la quijada fija 18 distalmente y hacia el canal alargado 16 del efecto r de extremo 12 y el movimiento proximal lleva a cabo el cierre, como se discute a continuación. El gatillo de cierre 26 es (desviado hacia delante a una posición de abierto mediante una superficie frontal 130 que interactúa con una superficie de acoplamiento 128 del gktiilllo 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 a ededor de un pasador 106 restringe el movimiento del gatillo de accionamientcj) 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 gatillp de accionamiento 28 al acoplar un pasador de inmovilización 107 en el gatillo de accionamiento 28. El gancho 104 también está en contacto con el gatillo de cierre 26. En particular, una proyección hacia delante 108 del gadho 104 acopla un elemento 110 en la sección intermedia 78 del gatillo de cierre 26, y el elemento 110 está hacia fuera del barreno 80 hacia la sección de manija 74. Se desvía 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 cap urado entre una proyección hacia atrás 1 14 en el gancho 104 y una proyección hacia delante 116 en el botón de liberación 30. A medida que la horquilla 86 se mueve distalmente en respuesta al movimiento proximal del gatillo de cierre 26, un brazo de trinquete superior 1 18 del botón de liberación 30 se muelve a lo largo de una superficie superior 120 en la horquilla 86 hasta caer en Jn hueco presentado ascendenteménte 122 en una porción inferior proximal dej la horquilla 86. El resorte de liberación 1 12 impulsa hacia fuera el botón de bbración 30, el cual efectúa un efecto de pivote del brazo de trinquete superior 1 8 descendentemente para acoplarse con el hueco presentado ascendenteménte 122, inmovilizando ahí el gatillo de cierre 26 en una posición de prensado) de tejido, como la que se ilustra en la figura 8. El brazo de trinquete 1 18 puede ser movido fuera del hueco 122 para liberar la quijada fija 18 al oprimirl el botón de liberación 30 hacia dentro.
Específicamente, el brazo de trinque e superior 1 18 hace efecto de pivote ascendentemente alrededor del pasadl or 123 de la segunda sección de base 52. Posteriormente se permite a la horquilla 86 moverse proximalmente en respuesta al movimiento de retorno de gatillo de cierre 26. Se ubica un resorte de retorno de gatillo de accionamiento 124 dentro de la porción de manija 20 con un extremo unido al pasador 106 de la segunda sección de base 52 y el otro extremo unido a un pasador 126 en el gatillo de accionamiento 28. El resorte be retorno de accionamiento 124 aplica una fuerza de retorno al pasador 126 para desviar el gatillo de accionamiento 28 en una dirección lejos del mango de pistola 24 de la porción de manija 20. El gatillo de cierre 26 también es desliado lejos del mango de pistola 24 al acoplar la superficie 128 del gatillo de accionamiento 28 que se desvía de la superficie frontal 130 del gatillo de cierre 26. A medida que el gatillo de cierre 26 se mueve hacia el mango de pistola 24, su superficie frontal 130 se acopla con la superficie de acoplamiento 128 en el gatillo de acciopamiento 28, ocasionando que el gatillo de accionamiento 28 se mueva a su| posición de "accionamiento". Cuando está en su posición de accionamiento, el gatillo de accionamiento 28 está ubicado en un ángulo de aproximadamente 45° al mango de pistola 24. Después de accionar la grapa, el resorte 124 hace que el gatillo de accionamiento 28 retorne a su posición inicial. Durante el movimiento de retorno del gatillo de accionamiento 28, su superficie de acoplamiento 128 hace presión contra la superficie f-ontal 130 del gatillo de cierre 26, ocasionando que el gatillo de cierre 26 regrese a su posición inicial. elemento de tope 132 se extiende desde la segunda sección de base 52 para prevenir que el gatillo de cierre 26 gire más allá de su posición inicial. El instrumento quirúrgicp de engrapado y corte 10 incluye adicionalmente una sección alternarjite 134, un multiplicador 136 y un elemento de impulso 138. La sección alternante 134 comprende una corredera de cuña en la porción de iimplementación 22 (que no se muestra en la figura 6-9) y un vástago de impulso c e metal 140. El elemento de impulso 138 incluye una primera y segunda cremalleras de engrane 141 y 142. Se provee una primer muesca 144 en el elemento de impulso 138 intermedia a la primer y segunda cremalleras de engrane 141 , 142. Durante el movimiento de retorno del gatillo de accionamiento 28, un diente 146 en el gatillo de accionamiento 28 se acopla con la primera muesca 144 para reto'nar el elemento de impulso 138 a su posición inicial después del accionamie nto de la grapa. Se ubica una segunda muesca 148 en un extremo proximal del vástago de impulso de metal 140 para bloquear el vástago de impulso ele 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 engranes de piñón integrales 150 y 152. El primer engrane de piñón integral 150 está acoplado con una primera cremallera de engrane 154 provista en el vástago dé impuso de metal 140. El segundo engrane de piñón integral 152 está acoplado con la primera cremallera de engrane 141 en el elemento de impulso 138. El primer engrane de piñón integral 150 tiene un primer diámetro y el segundo engrane de piñón integral 1 p2 tiene un segundo diámetro que es más pequeño que el primer diámetro. Las figuras 6, 8 y 9 ilustran 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 accionamiento 28 con una sección de segmento de engrane 156. 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 a grapa antes de que haya ocurrido el prensado del tejido, el brazo de trihquete superior 1 18 en el botón de liberación 30 se acopla con la segi nda muesca 148 en el elemento de impulso 138 para que el vástago de impulso de metal 140 se bloquee 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 ¡lustra en la figura 9. Ya que la primera cremallera de engrane 141 en el elemento de impulso 38 y la cremallera de engrane! 154 en el vástago de impulso de metal 140 están acoplados con el multiplicador 136, el movimiento del gatillo de cartucho de grapas 37 acoplan los hu|ecos 212; 214 (que se muestran en la figura 12) del canal alargado 16. La figura 11 muestra porción de implementación 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 216, una corredera de cuña 218, impulsores individuales y dobles 220, grapas 222 y una bandeja para cartucho 224. Cuando se ensambla, la bandeja para cartucho 224 mantiene la corredera de cuña 218, impulsores individuales y dobles 220 y las grapas 222 dentro de cuerpo de cartucho 216. Contar con una corredera de cuña 218 íntegra al cartucho de grapas 37 permite una serie de opcior es de diseño flexibles en comparación con la incorporación de superficies de leva en la misma barra de accionamiento. Por ejemplo, se puede seleccionar una serie de diferentes cartuchos de grapas para ser utilizadas en el instrumento 10 y en donde cada cartucho de grapas puede tener un a configuración diferente de filas de grapas, cada una con una corredera de cuña única configurada para hacer contacto con el pasador medio 46 de la barra de accionamiento 14 y simultáneamente ocasionar el impulso Ide las grapas 222. Como otro ejemplo, la corredera de cuña integral 218 ofrece la oportunidad para una serie de características de cierre, que se describen en mayor detalle en la primera y tercer solicitudes copendientes mencionadas anteriormente. El canal alargado 16 tiene una cavidad de unión colocada proximalmente 226 que recibe un elemento de anclaje de canal 228 en el extremo distal el bastidor 34 para unir efector de extremo 12 a la porción de manija 20. Él canal alargado 16 tambiéjn tiene una ranura de leva para quijada fija 230 que recibe mediante efecto de pivote un pivote de quijada fija 232 de la quijada fija 18. El casquilio de cierrp 32 que abarca el bastidor 34 incluye una lengüeta presentada distalmente £34 que se acopla a una característica de quijada fija 236 que esta próxima p ro distal al pivote de quijada fija 232 en la quijada fija 18 para llevar a cabo y 4 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, el cual a| su vez está unido de manera girable y proximal al vástago de impulso dé metal 140. Se guía la barra de accionamiento 14 a un extremo distal del bastidor mediante una guía ranurada 239 insertada en el mismo. Con referencia particular a la figura 12, se remueve una porción del cartucho de grapa 37 para exponer las porciones del canal alargado 16, como los huecos 212, 214 y para expc ner algunos componentes del cartucho de grapas 37 en su posición no acc onada. 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 corredera de cuña 218 está en contacto deslizante longitudinal sobre a bandeja de cartuchos 224 e incluye cuñas 228 que fuerzan ascendenteme te los impulsores individuales y dobles 220 a medida que la corredera de cuñas 218 se mueve distalmente. Las grapas 222 (que no se muestran en la figura 12) que reposan sobre los impulsores 220 también son forzadas> así ascendentemente para entrar en contacto con las cavidades de formación de la quijada fija 202 en la quijada fija 18 para formar grapas cerradas. También se ilustra la ranura de canal 45 en el canal alargado 16 está alineado pon la ranura vertical 49 en el cartucho de grapas 37. La figura 13 ilustra el efe tor de extremo 12 de la figura 12 con todo el cartucho de grapas 37 removido para mostrar el pasador medio 46 de la barra de accionamiento 14 así como porción del canal alargado 16 removido adyacente a la ranura de ca nal 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 tejido opuestos 244 previenen que el tejido se posicione demasiado lejos hacia arriba dentro |del efector de extremo 12 durante el prensado. La figura 14 ilustra el e ctor de extremo 12 cerrado 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 verticalmente con la ranura de quijada 42 para el movimiento longitudinal distal de la barra de accionamiento - durante el accionamiento. El pasador medio 46 está posicionado para empujur 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 quijada fija 18. La figura 15 ilustra la superficie superior 206 del cartucho de grapas 37 con la barra de accionamie nto 14 en su posición no accionada y proximal. Las aperturas de la engra Dadora 204 están dispuestas a cada costado de la ranura vertical 49 en el cartucho de grapas 37. La figura 16 ilustra el efec tor de extremo 2 cerca del pivote que muestra que el canal alargado 16 ti sne porciones de superficie inclinada opuestas 246 para cooperar ahí con le s topes de tejido 244 de la quijada fija 18 (que no se muestran en la figura 6) para prevenir que el tejido atore el efector de extremo 12. También ¡lastrados a mayor detalle están los impulsores dobles 220 y su relación con las grapas 222.
Operación En su uso, se utiliza el instrumento quirúrgico de engrapado y corte 10 como se ilustra en las figu r&s 1 ,2 y 17-23. En las figuras 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 trbear u otra abertura en una cavidad del cuerpo. Posteriormente el médico marh ¡pula el instrumento para que el tejido 248 a ser engrapado y cortado esté pdsicionado 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 médico el gatillo de cierre 26 proximalmente hasta que esté posicionado directamente adyacente al mango de pistola 24, bloqueando la porción de manija 20 en la posición cerrada y de prensado. La barra de accionamiento que se retrae 14 en el efector de extremo 12 no impide la abertura y cierre selectivos del efector de extremo 12, sino que más bien reside dentro de la cavidad de quijada fija 40. Con la quijada fija 18 cerrada y prensada, la barra de accionamiento con vigueta en E 14 está alineada para su accionamiento a través del efector de extremo 12. En p articular, se alinea el pasador superior 38 con la ranura de quijada fija 42 y el canal alargado 16 se acopla afirmativamente alrededor de la ranú ra de canal 45 mediante el pasador medio 46 y la tapa de la barra de acciohamiento 44. Con referencia a las figu |ras 20-21 , una vez que ha ocurrido el prensado del tejido, el médico mueve el gatillo de accionamiento 28 proximalmente, ocasionando que la barra de accionamiento 14 se mueva distalmente en el efector de extremo 12. En particular, el pasador medio 46 entra en el cartucho de grapas 37 a través de la ranura de impulso de accionamiento 47 para llevar a cabo e accionamiento de las grapas 222 (que no se muestran en las figuras 20-21 ) rr ediante la corredera de cuña 218 hacia la quijada fija 18. El pasador más inferior, o tapa de la barra de accionamiento 44, coopera con el pasador medio 46 para posicionar de manera deslizable el borde de corte 48 de la barra de acc nam ¡ento 14 para cortar el tejido. Los dos pasadores 44,46 también posicion|an el pasador superior 38 de la barra de accionamiento 14 dentro de la ranura de quijada fija longitudinal 42 de la quijada fija 18, manteniendo de madera afirmativa la separación entre la quijada 18 y el canal alargado 16 a tra Vés de su movimiento de accionamiento distal. Con referencia a las figuras 22-23, el médico continua moviendo el gatillo de accionamiento 28 hasta que queda próximo al gatillo de cierre 26 y mango de pistola 24. En ese punto, tudos los extremos de las grapas 222 se doblan como resultado de su acoplami ento con la quijada fija 18. La tapa de la barra de accionamiento 44 se detie ne contra un tope de una barra de accionamiento 250 que se proyecta r ada 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 e| gatillo de accionamiento 28 y luego al oprimir el botón de liberación 30 y simultáneamente apretando 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 técrjiica. 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 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 ilargado tenga una ranura interna que atrape un pasador inferior. Para otro ejemplo, aundue la vigueta de accionamiento de vigueta en E 14 tiene ventajas para un instrumento quirúrgico de corte y engrapado que se emplee endoscó picamente 10, se puede utilizar una vigueta en E en otros procedimientos ínédicos. Es aceptación común que los procedimientos endoscópicos son mas comunes que los procedimientos laparoscópicos. En consecuencia, se ha discutido la presente invención en términos de procedimientos y aparatos! endoscópicos. Sin embargo, el uso en la presente de términos como "endosdópicos" no debe ser interpretado como límite de la presente invención para un instrumento quirúrgico de engrapado y corte que se utilice únicamente en conjunción con un tubo endoscópico (es decir, trocar). Por el contrario, se piens a que la presente invención puede ser utilizada en cualquier procedimiento en el que el acceso está limitado a una incisión pequeña, incluyendo pero no limitado a procedimientos laparoscópicos, así como a procedimientos abiertos. Para otro ejemplo, aunqu e médico opera manualmente una porción de manija ilustrativa 20 que describe en la presente, de conformidad con aspectos de la invenqión es consistente que algunos o todas las funciones de una porción de manjija sean alimentadas (por ejemplo, de manera neumática, hidráulica, electrofaecánica , ultrasónica, etc.). Aún más, se pueden presentar manualmente os controles de cada una de estas funciones en una porción de manija o ser controladas remotamente (por ejemplo remoto inalámbrico, consola remota automatizada, etc.). Como un ejemplo adicional , aunque se ilustra en la presente un instrumento simultáneo de engrapado y corte, sería consistente con aspectos de la invención que el engrapado co mprendiera otros tipos de sujetadores y técnicas de unión.
Inmovilización de quijada üa no cerrada Las figuras 24-26 ilustran en mayor detalle un mecanismo de inmovilización de quijada fija 260 quei evita convenientemente la operación anormal del efector de extremo 12 de Dido a una cantidad excesiva de tejido prensado 248. En particular, el mecanismo de inmovilización de quijada fija 260 evita un accionamiento equivocado en donde la barra de accionamiento 14 se acciona parcial o totalmente, coitando tejido, pero en donde las grapas no se forman apropiadamente en cad|a costado de la incisión para cerrar el tejido cortado por la incisión. En la figura 24 el efector de extremo 12 ha sido cerrado con prensado. Sin embargo, el tejido prensado 248 es ligeramente más grueso que una escala apropiada. Así, la quijada fija 18 hace efecto de pivote lejos Aunque se ha ¡lustrado la presente invención mediante la descripción de diversas modalidades y aunque se han descrito las modalidades ilustrativas con un detal [e considerable, no es la intención del solicitante restringir o de modo alguno limitar el alcance de las reivindicaciones adjuntas a dicho detalle. Serán evidentes ventajas y modificaciones adicionales para los ex pertos en la técnica, Por ejemplo, aunque se ilustra un pasador superior 38 que se acopla selectivamente a una ranura de quijada fija 42 en la modalidad ilustrada, se observará que se puede formar un mecanismo de inmovilización de quijada fija con una quijada fija que tenga una ranura que atraviese completamente a través de la qi| ijada fija para que una barra de accionamiento se acople tanto una $uperficie superior como inferior de la quijada fija a medida que la barra de adcionamiento se mueve distalmente.

Claims (9)

NOVEDAD DE LA INVENCION REIVINDICACIONES
1 .- Un instrumento quirúrgico que comprende: una porción de manija operable para producir un mov miento de accionamiento; una porción de implementación que responde a lo 5 movimientos de accionamiento de la porción de manija, y la porción de mplementación comprende: un canal alargado acoplado a la porción de manija y que incluye una ranura de canal, un cartucho de grapas que es recibido; por el canal alargado, una quijada fija acoplada mediante efecto de pivote a canal alargado y que incluye un canal de quijada fija, un dispositivo de accionamiento que acopla longitudinalmente al canal alargado y que es acoplable a la quijada fija, y un mecanismo de inmovilización de quijada fija orientaqo para impedir que el dispositivo de accionamiento se acople a la quijada fijla cuando la quijada fija esté abierta.
2.- El instrumento quirúrgbo de conformidad con la reivindicación 1 , caracterizado además porque la quil ada fija incluye un dispositivo superior que es operable para acoplar el canal de quijada fija, y la inmovilización de la quijada fija comprende una superfic ie inclinada embotada que hace la transición del dispositivo superior en el canal de quijada fija cuando la quijada fija está cerrada.
3.- El instrumento quirúrgi ;o de conformidad con la reivindicación 1 , caracterizado además porque la porción de implementación además comprende un cartucho de grapas recibido en el canal alargado, y el dispositivo de accionamiento es operajble para activar el cartucho de grapas durante el accionamiento.
4.- El instrumento quirúrgibo de conformidad con la reivindicación 1 , caracterizado además porque la quijada fija incluye un hueco próximo al dispositivo de accionamiento cuanqo está en una posición de no accionamiento, y un canal de quijada| longitudinal que comunica con el hueco para recibir el elemento supejrior del dispositivo de accionamiento cuando es accionado.
5. - El instrumento quirúrgibo de conformidad con la reivindicación 4, caracterizado además porque di canal alargado incluye un canal longitudinal y una porción inferior del dispositivo de accionamiento además comprende un elemento intermedio y n elemento inferior que se acoplan de manera opuesta al canal longitudinal.
6. - El instrumento quirú jrgibo de conformidad con la reivindicación 1 , caracterizado además porque e canal alargado incluye un canal longitudinal y una porción inferior del dispositivo de accionamiento además comprende un elemento intermedio y i n elemento inferior que se acoplan de manera opuesta al canal longitudinal.
7. - Un instrumento quirú rgico que comprende: una porción de manija operable para producir de manera separada un movimiento de accionamiento y un movimiento de cierre ; una porción de implementación que responde a los movimientos separados de accionamiento y cierre de la porción de manija, y la porción de mplementación comprende: un canal alargado acoplado a la porción de manija, una quijada fija acoplada mediante efecto de pivote al canal alargado y que incluye un hueco y un canal de quijada fija, un dispositivo de accionamiento que incluye un borde de corte presentado distalmente y que es reci bido longitudinalmente entre el canal alargado y la quijada fija, un elemen o superior acoplable con el canal de quijada fija y una porción inferior que acopla longitudinalmente con el canal alargado, y el elemento superior reside dentro del hueco de quijada fija cuando está en una posición no acc nada para permitir el movimiento de cierre separado de la quijada fija, y un mecanismo de inmovilización de quijada fija que comunica entre el hueco de quijada fija y el canal de quijada fija, en donde el mecanismo de inmovi zación de quijada bloquea el elemento superior cuando la quijada fija no está cerrada.
8.- El instrumento quirúrgbo de conformidad con la reivindicación 7, caracterizado además porque el mecanismo de inmovilización de quijada fija comprende una superficie canal de quijada fija que termina proximalmente en una superficie embatada posicionada para que tope contra el dispositivo de accionamiento cuando la quijada fija se eleva.
9.- El instrumento quirúrgi ;o de conformidad con la reivindicación 8, caracterizado además porque el mecanismo de inmovilización de quijada fija además comprende una superficie inclinada embotada que comunica entre una superficie interna y la superficie err botada del canal de quijada fija. Un instrumento endoquirúrgico que comprende: una porción de manija operable para producir dej manera separada un movimiento de accionamiento y un movimiento de fierre; un efector de extremo con un tamaño para su inserción a través de u¡ n paso de cánula endoquirúrgica; y una flecha unida entre la porción de maní a en el efector de extremo y que está configurada para transferir de manera separada los movimientos accionamiento y cierre entre ellos efector de extremo además comprende: un canal alargado acoplac o a la flecha, una quijada fija acoplada mediante efecto de pivote al canal alargado en respuesta al movimiento de cierre para que se mueva entre una posición abierta a una posición cerrada, un dispositivo de accionamiento recibido longitudinalmente entre el canal alargado y la quijada fija y que incluye un elemento superior acoplable al canal de quijada fija durante el movimiento distal para su accionamiento, y un mecanismo de inmovilización de quijada fija que está configurado de manera operable para prevenir el movimiento distal del dispositivo de accionamiento en respuesta a una condición de abierto de la quijada fija. 1 1.- El instrumento endoquirúrgico de conformidad con la reivindicación 10, caracterizado además porque la porción de manija es operable adicionalmente para prensarf el movimiento de cierre y permitir el movimiento de accionamiento en re spuesta a un movimiento de cierre prensado, y el mecanismo de inmovilización de quijada fija además está configurado de manera operable para responder a una condición de abierto de quijada fija que comprende un movimiento de cierre prensado y una quijada fija con efecto de pivote lejos de una posición cerrada mediante una cantidad sobrante de tejido prensado. 12.- El instrumento entloquiirúrgico de conformidad con la reivindicación 10, caracterizado adelmás porque también comprende un cartucho de grapas recibido en el canal alargado, y el dispositivo de accionamiento es operable para acti ar el cartucho de grapas durante el accionamiento. 13. - El instrumento en joquirúrgico de conformidad con la reivindicación 10, caracterizado adenás porque la quijada fija incluye un hueco próximo al dispositivo de accionamiento cuando está en una posición de no accionamiento y un canal de quijada fija longitudinal que se comunica con el hueco para recibir el elemento superior del dispositivo de accionamiento cuando es accionado, el mecanismo de inmovilización de quijada fija que está configurado pana prevenir de manera selectiva que el elemento superior del dispositivo de accionamiento haga la transición desde el hueco al canal de quijada fija. 14. - El instrumento enüoquirúrgico de conformidad con la reivindicación 13, caracterizado además porque el canal alargado incluye un canal longitudinal acoplado de manara deslizable mediante una porción inferior del dispositivo de accionamiento. 15. - El instrumento en joquirúrgico de conformidad con la reivindicación 14, caracterizado además porque el canal longitudinal comprende una ranura longitudinal y juna porción inferior del dispositivo de accionamiento comprende un elemento medio y un elemento inferior que se acoplan de manera opuesta a la ranura longitudinal del canal alargado. 16.- El instrumento enpoqi uirúrgico de conformidad con la reivindicación 13, caracterizado ajdemás porque el mecanismo de inmovilización de quijada fija comprende una superficie embotada posicionada por debajo del elemento superior del dispositivo de accionamiento respectivamente cuando la quijada fija está en la posición de cerrado y está posicionada en una posición de ejstribo con el elemento superior del dispositivo de accionamiento cuando laj quijada fija está en la posición abierta, 17.- El instrumento entioquirúrgico de conformidad con la reivindicación 16, caracterizado además porque el mecanismo de inmovilización de quijada fija además comprende una superficie inclinada que hace la transición entre la superficie inclinad a y el canal de quijada fija, 18.- El instrumento entioqu irúrgico de conformidad con la reivindicación 10, caracterizado ajdemás porque el mecanismo de inmovilización de quijada fija comp ende un medio para inmovilizar el movimiento superior de barra de accioilamiento 19.- El instrumento endoquirúrg ico de conformidad con la reivindicación 18, caracterizado además porque el efector de extremo además comprende un medio para separar de manera afirmativa la quijada fija y el canal alargado durante el accionamiento
MXPA04004888A 2003-05-20 2004-05-20 Instrumento de engrapado quirurgico que cuenta con una inmovilizacion contra accionamiento para una quijada fija no cerrada. MXPA04004888A (es)

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US7143923B2 (en) 2006-12-05
CA2468130C (en) 2012-05-15
ES2334914T3 (es) 2010-03-17
ATE449570T1 (de) 2009-12-15
AU2010241284B2 (en) 2011-08-18
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US20040232199A1 (en) 2004-11-25
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EP1479347A1 (en) 2004-11-24
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JP2004344661A (ja) 2004-12-09
JP4703978B2 (ja) 2011-06-15

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