ES2637800T3 - Instrumento quirúrgico que tiene una viga de impulsión multicapa - Google Patents
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Abstract
Un instrumento quirúrgico (500), que comprende: una parte (510) de la empuñadura; una parte (512) del cuerpo que se extiende distalmente desde la parte de la empuñadura y que define un primer eje longitudinal; una empuñadura móvil (516) dispuesta en la parte de la empuñadura y en cooperación mecánica con un miembro de impulsión (272); un conjunto (17) de herramientas que incluye un yunque (20), un conjunto (18) del cartucho y una superficie de contacto, estando soportado el conjunto de herramientas contiguo a un extremo distal de la parte del cuerpo; una viga de impulsión (750, 802) que incluye una pluralidad de capas (750a-750e), teniendo al menos una capa una parte proximal de aplicación dispuesta contigua a un extremo proximal de ella y que está configurada para aplicarse en una parte del miembro de impulsión (272); un aparato de cierre (800) dispuesto contiguo a un extremo distal de la viga de impulsión, incluyendo el aparato de cierre una superficie de corte (766, 808) en él, una sección recta del aparato de cierre tiene generalmente forma de I con partes horizontales, estando configuradas dichas partes horizontales para aplicarse en la superficie de contacto del conjunto (17) de herramientas, por lo que al menos un accionamiento parcial de la empuñadura móvil mueve el aparato de cierre distalmente hasta aplicación con la superficie de contacto para aproximar el yunque (20) y el conjunto (18) del cartucho; y incluyendo la viga de impulsión (750, 802) entre cuatro capas y seis capas, estando hecha al menos una capa de la viga de impulsión de acero inoxidable, donde cada una de la pluralidad de capas (750a-750e) de la viga de impulsión incluye al menos un corte (770) dispuesto a través, siendo la viga de impulsión parte de una unidad de carga desechable, y caracterizado por que partes del aparato de cierre (800) comprenden una superficie plástica proporcionada por un recubrimiento plástico, plástico sobremoldeado o tapas (804) de plástico que cubren al menos parcialmente dichas partes horizontales (806).
Description
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DESCRIPCION
Instrumento quirurgico que tiene una viga de impulsion multicapa Campo tecnico
La presente descripcion se refiere a un instrumento quirurgico y una unidad de carga desechable que incluye una superficie plastica sobre ella. Mas particularmente, la presente descripcion se refiere a un instrumento quirurgico que incluye una superficie plastica sobre al menos uno de un aparato de cierre y una superficie de contacto de un conjunto de herramientas.
Antecedentes
En la tecnica son bien conocidos los dispositivos quirurgicos en los que el tejido es primero asido o apretado entre una estructura de mandfbulas opuestas y despues sujeto por unos fijadores. En algunos instrumentos se dispone una cuchilla para cortar el tejido que ha sido unido por los fijadores. Los fijadores tfpicamente tienen la forma de grapas quirurgicas aunque tambien se pueden utilizar fijadores polimericos de dos piezas.
Los instrumentos para este fin pueden incluir dos miembros alargados que se usan respectivamente para agarrar o coger el tejido. Tfpicamente, uno de los miembros lleva un cartucho de grapas que aloja una pluralidad de grapas dispuestas en al menos dos filas laterales mientras que el otro miembro tiene un yunque que define una superficie para formar las patillas de la grapa a medida que las grapas son impulsadas desde el cartucho de las grapas. En algunos instrumentos el cierre de los dos miembros alargados, o conjunto de herramientas, es afectado por el accionamiento de una empunadura movil que mueve una viga de impulsion que tiene un aparato de cierre en el en una superficie de contacto de un conjunto de herramientas, que de este modo aproxima los miembros del conjunto de herramientas. El documento US 5.865.361 describe un aparato de grapado quirurgico segun el preambulo de la reivindicacion 1.
Compendio
La invencion es como se describe en el juego de reivindicaciones adjunto. La presente descripcion se refiere a un instrumento que incluye una parte de empunadura, una parte del cuerpo, una empunadura movil, un conjunto de herramientas, una viga de impulsion y un aparato de cierre. La parte del cuerpo se extiende distalmente desde la parte de la empunadura y define un primer eje longitudinal. La empunadura movil esta situada en la parte de la empunadura y esta en cooperacion mecanica con un miembro de impulsion. El conjunto de herramientas esta soportado contiguo a un extremo distal de la parte del cuerpo e incluye un yunque, un conjunto de cartucho y una superficie de contacto. La viga de impulsion incluye una pluralidad de capas (por ejemplo, entre cuatro, cinco o seis) y al menos una capa tiene una parte de aplicacion proximal situada contigua a un extremo proximal de ella y esta configurada para aplicarse en una parte del miembro de impulsion. El aparato de cierre esta situado contiguo a un extremo distal de la viga de impulsion y esta configurado para aplicarse en la superficie de contacto del conjunto de herramientas e incluye una superficie de corte en una realizacion descrita. Al menos un accionamiento parcial de la empunadura movil mueve el aparato de cierre distalmente a aplicarse en la superficie de contacto para aproximar el yunque y el conjunto del cartucho. Al menos una de las capas (que incluye todas las capas) de la viga de impulsion esta adherida a una capa contigua de la viga de impulsion por medio de un punto de soldadura.
En una realizacion al menos una capa (que incluye todas las capas) de la viga de impulsion es de acero inoxidable. Se ha descrito que todas las capas de la viga de impulsion estan adheridas entre sf (por ejemplo, soldadas por puntos en al menos un sitio). En una realizacion la viga de impulsion incluye dos capas exteriores y al menos una capa interior, las dos capas exteriores estan adheridas al aparato de cierre y a la al menos una capa interior. Cuando hay mas de una capa interior se ha descrito que cada capa interior esta adherida a una capa interior contigua en al menos un sitio.
En una realizacion la seccion recta del aparato de cierre generalmente tiene una forma de I. Tambien se ha descrito que cada una de una pluralidad de capas de la viga de impulsion incluye una pluralidad de recortes a traves de ellas.
En una realizacion la viga de impulsion es parte de una unidad de carga desechable. La presente descripcion se refiere tambien a una unidad de carga desechable que incluye unas caractensticas de la viga de impulsion, como se ha descrito antes, y un conjunto de herramientas (por ejemplo, un conjunto de herramientas articuladas).
Descripcion de los dibujos
Las diversas realizaciones del instrumento quirurgico presentemente descrito se describen aqrn con referencia a los dibujos, en donde:
la Figura 1 es una vista lateral en perspectiva desde el extremo distal de una realizacion del instrumento quirurgico presentemente descrito con el conjunto de herramientas articuladas;
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la Figura 1A es una vista lateral en perspectiva desde el extremo proximal de una unidad de carga desechable (DLU) del instrumento quirurgico mostrado en la Figura 1 que incluye el conjunto de herramientas;
la Figura 2 es una vista lateral en perspectiva del extremo distal del conjunto de montaje y del conjunto de herramientas, con las piezas separadas, de la DLU del instrumento quirurgico mostrado en la Figura 1;
la Figura 3 es una vista lateral en perspectiva del conjunto de montaje y de la parte del cuerpo proximal de la DLU mostrada en la Figura 1A con las piezas separadas;
la Figura 3A es una vista lateral en perspectiva de un miembro de acoplamiento del instrumento quirurgico mostrado en la Figura 1;
la Figura 3B es una vista lateral en perspectiva de una parte de montaje superior del conjunto de montaje de la DLU del instrumento quirurgico mostrado en la Figura 1;
la Figura 3C es una vista lateral en perspectiva de una parte de montaje inferior del conjunto de montaje de la DLU del instrumento quirurgico mostrado en la Figura 1;
la Figura 3D es una vista lateral en perspectiva desde arriba de la parte proximal del cuerpo, del conjunto de montaje y del conjunto de herramientas de la DLU del instrumento quirurgico con el conjunto de herramientas en su posicion no articulada;
la Figura 3E es una vista lateral en perspectiva desde arriba de la parte proximal del cuerpo, del conjunto de montaje y del conjunto de herramientas mostrados en la Figura 3D con el conjunto de herramientas en una posicion articulada;
la Figura 3F es una vista lateral en perspectiva desde abajo de la parte proximal del cuerpo, del conjunto de montaje y del conjunto de herramientas de la DLU del instrumento quirurgico con el conjunto de herramientas en su posicion no articulada;
la Figura 3G es una vista lateral en perspectiva desde abajo de la parte proximal del cuerpo, del conjunto de montaje y del conjunto de herramientas mostrado en la Figura 3F con el conjunto de herramientas en una posicion articulada;
la Figura 4 es una vista lateral de la seccion recta del conjunto de herramientas de la DLU mostrada en la Figura 1A;
la Figura 5 es una vista en perspectiva desde arriba del accionador del miembro de enclavamiento del mecanismo de enclavamiento de la parte proximal del cuerpo mostrado en la Figura 3;
la Figura 6 es una vista en perspectiva desde abajo de un miembro de enclavamiento del mecanismo de enclavamiento mostrado en la Figura 3;
la Figura 7 es una vista desde arriba del extremo proximal de la parte proximal del cuerpo de la DLU mostrada en la Figura 1A con el mecanismo de enclavamiento en su posicion bloqueada;
la Figura 8 es una vista de la seccion recta realizada a lo largo de las lmeas 8-8 de la Figura 7;
la Figura 9 es una vista desde arriba del extremo proximal de la parte proximal del cuerpo de la DLU mostrada en la Figura 1A con el mecanismo de enclavamiento en su posicion desbloqueada;
la Figura 10 es una vista de la seccion recta realizada a lo largo de las lmeas 10-10 de la Figura 9;
la Figura 11 es una vista lateral en perspectiva de la DLU y del instrumento quirurgico mostrado en la Figura 1 antes de la sujecion de la DLU al instrumento quirurgico;
la Figura 12 es una vista desde arriba del extremo proximal de la DLU y del extremo distal del instrumento quirurgico mostrados en la Figura 11 antes de la sujecion al extremo distal del instrumento quirurgico;
la Figura 13 es una vista desde arriba del extremo proximal de la DLU mostrada en la Figura 11 a medida que la DLU es avanzada linealmente en el extremo distal del instrumento quirurgico;
la Figura 14 es una vista desde arriba del extremo proximal de la DLU y del extremo distal del instrumento quirurgico mostrados en la Figura 12 despues de que la DLU ha sido avanzada linealmente pero antes del enclavamiento de la DLU al instrumento quirurgico;
la Figura 15 es una vista desde arriba del extremo proximal de la DLU y del extremo distal del instrumento quirurgico mostrados en la Figura 13 despues de que la DLU ha sido avanzada linealmente y bloqueada de forma rotativa sobre el instrumento quirurgico;
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la Figura 16 es una vista en perspectiva de un conjunto de enclavamiento para uso con un instrumento quirurgico de acuerdo con una realizacion de la presente descripcion;
la Figura 17 es una vista en perspectiva de los diversos componentes del conjunto de enclavamiento de la Figura 16;
la Figura 18 es una vista en perspectiva ampliada de una parte del conjunto de enclavamiento de las Figuras 16 y 17 ilustradas con un conjunto de herramientas articuladas en una posicion no articulada;
la Figura 19 es una vista en perspectiva ampliada de una parte del conjunto de enclavamiento de las Figuras 16-18 y que incluye una barra articulada;
la Figura 20 es una vista en perspectiva ampliada de una parte del conjunto de enclavamiento de las Figuras 16-19 ilustrada con el conjunto de herramientas articuladas en una posicion articulada;
la Figura 21 es una vista en perspectiva ampliada de otro conjunto de enclavamiento para uso con un instrumento quirurgico de acuerdo con una realizacion de la presente descripcion;
la Figura 22 es una vista en perspectiva desde abajo ampliada del conjunto de enclavamiento de la Figura 21;
la Figura 23 es una vista en perspectiva de una viga de impulsion que tiene una pluralidad de capas y un aparato de cierre de acuerdo con una realizacion de la presente descripcion;
la Figura 24 es una vista en perspectiva de la viga de impulsion y del aparato de cierre de la Figura 23 con las piezas separadas;
la Figura 25 es una vista de la seccion recta de una parte de la viga de impulsion y del aparato de cierre de las Figuras 23 y 24;
la Figura 26 es una vista de la seccion recta de una viga de impulsion y de un aparato de cierre de acuerdo con una realizacion de la presente descripcion;
la Figura 27 es una vista de la seccion recta de la viga de impulsion y del aparato de cierre de la Figura 26;
la Figura 28 es una vista en perspectiva de un conjunto de herramientas de acuerdo con una realizacion de la presente descripcion; y
la Figura 29 es una vista del conjunto del conjunto de herramientas de la Figura 28.
Descripcion detallada de las realizaciones
A continuacion se describen con detalle realizaciones del instrumento quirurgico y de la DLU presentemente descritos con referencia a los dibujos, en los que numeros de referencia iguales designan elementos identicos o correspondientes en cada una de las varias vistas.
Con referencia a la Figura 1, el instrumento quirurgico 500 incluye una parte 510 de la empunadura, una parte 512 del cuerpo, y una unidad de carga desechable (“DLU”) 16. La parte 510 de la empunadura incluye una empunadura fija 514 y una empunadura movil o disparador 516. La empunadura movil 516 es movil con relacion a la empunadura fija 514 para avanzar una varilla de control 520 que sobresale del extremo distal de la parte 512 del cuerpo. La parte 510 de la empunadura y la parte 512 del cuerpo pueden estar construidas de la forma descrita en la Patente de EEUU N° 6.330.965. Alternativamente, se pueden usar otros instrumentos quirurgicos con la DLU 16 para llevar a cabo procedimientos quirurgicos endoscopicos.
Con referencia a las Figuras 1 y 1A, brevemente, la DLU 16 incluye un conjunto 17 de herramientas, una parte proximal 200 del cuerpo y un conjunto de montaje 202. La parte 200 del cuerpo tiene un extremo proximal adaptado para aplicarse de forma liberable en el extremo distal de un instrumento quirurgico 500 (Figura 11) de una forma que va a ser discutida con detalle mas adelante. El conjunto de montaje 202 esta asegurado de forma pivotante a un extremo distal de la parte 200 del cuerpo y esta asegurado de forma fija a un extremo proximal del conjunto 17 de herramientas. El movimiento pivotante del conjunto de montaje 202 alrededor de un eje perpendicular a un eje longitudinal de la parte 200 del cuerpo afecta a la articulacion del conjunto 17 de herramientas entre una posicion no articulada en la que el eje longitudinal del conjunto 17 de herramientas esta alineado con el eje longitudinal de la parte 200 del cuerpo y una posicion articulada en la que el eje longitudinal del conjunto 17 de herramientas esta dispuesto en angulo con el eje longitudinal de la parte 200 del cuerpo.
Con referencia a las Figuras 2-4, el conjunto 17 de herramientas incluye un conjunto 18 del cartucho y un conjunto 20 del yunque. El conjunto 20 del yunque incluye una parte 28 del yunque que tiene una pluralidad de concavidades 30 que deforman las grapas (Figura 4) y una placa 32 de cubierta asegurada a una superficie superior de una parte 28 del yunque. La placa 32 de cubierta y la parte 28 del yunque definen una cavidad 34 entre ellas (Figura 4) que
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esta dimensionada para recibir un extremo distal de un conjunto de impulsion 212 (Figura 3). La placa 32 de cubierta encierra el extremo distal del conjunto de impulsion 212 para impedir la compresion del tejido durante el accionamiento de la DLU 16. Una ranura longitudinal 38 se extiende a traves de la parte 28 del yunque para facilitar el paso de una brida de retencion 40 del conjunto de impulsion 212. Una superficie 42 de leva formada sobre la parte 28 del yunque esta situada para aplicarse en un par de miembros 40a de leva soportado en la brida de retencion 40 del conjunto de impulsion 212 para efectuar la aproximacion de los conjuntos del yunque y del cartucho. Se forman un par de miembros 44 de pivote. Un par de miembros estabilizadores 50 se aplican en un respectivo brazo 52 formado en la corredera 48 para impedir que la parte 28 del yunque deslice axialmente en relacion con el cartucho 54 de grapas cuando la superficie 42 de leva es pivotada alrededor de los miembros 44 de pivote.
El conjunto 18 del cartucho incluye una corredera 48 la cual define un canal de soporte alargado 56 que esta dimensionado y configurado para recibir el cartucho 54 de las grapas. Las correspondientes lenguetas 58 y ranuras 60 formadas a lo largo del cartucho 54 de las grapas y el canal de soporte alargado 56, respectivamente, funcionan para retener el cartucho 54 de las grapas en un lugar fijo dentro del canal de soporte 56. Un par de puntales 62 de soporte formados sobre el cartucho 54 de las grapas esta situado para apoyarse en las paredes laterales de la corredera 48 para ademas estabilizar el cartucho 54 de las grapas dentro del canal de soporte 56. La corredera 48 tiene unas ranuras 46 para recibir los miembros 44 de pivote de la parte 28 del yunque y permitir que la parte 28 del yunque se mueva entre unas posiciones separadas o aproximadas.
El cartucho 54 de las grapas incluye las ranuras de retencion 64 (Figura 2) para recibir una pluralidad de grapas o fijadores 66 y empujadores 68. Una pluralidad de ranuras longitudinales 70 separadas lateralmente se extienden a lo largo del cartucho 54 de las grapas para alojar unas cunas 72 de leva rectas de una grna de accionamiento 74 (Figura 2). Una ranura longitudinal central 76 se extiende a lo largo de sustancialmente la longitud del cartucho 54 de las grapas para facilitar el paso de una hoja de cuchilla 78 (Figura 4). Durante el funcionamiento de la grapadora quirurgica 10 el conjunto de impulsion 212 hace tope en la grna de accionamiento 74 y empuja la grna de accionamiento 74 a traves de las ranuras longitudinales 70 del cartucho 54 de las grapas para avanzar las cunas 72 de leva a un contacto secuencial con los empujadores 68. Los empujadores 68 trasladan verticalmente las cunas 72 de leva dentro de unas ranuras de retencion 64 del fijador y empujan los fijadores 66 desde las ranuras de retencion 64 a las cavidades de deformacion 30 (Figura 4) del conjunto 20 del yunque.
Con referencia a la Figura 3, el conjunto de montaje 235 incluye una parte de montaje superior 236 y una parte de montaje inferior 238. Un miembro 284 de pivote situado centralmente se extiende desde una parte de montaje superior 236 a traves de una abertura respectiva 246a formada en un primer miembro de acoplamiento 246. La parte de montaje inferior 238 incluye un taladro 239 para recibir el miembro 284 de pivote (vease la Figura 3F). El miembro 284 de pivote se extiende a traves del taladro 239 y de la abertura 247a de un segundo miembro de acoplamiento 247. Cada uno de los miembros de acoplamiento 246, 247 incluye una parte proximal de enclavamiento 246b, 247b configurada para ser recibida en las acanaladuras 290 formadas en el extremo distal de un alojamiento interior que esta formado a partir de las mitades de alojamiento superior e inferior 250 y 252. Los miembros de acoplamiento 246, 247 retienen el conjunto de montaje 235 y las mitades de alojamiento superior e inferior 250 y 252 en una posicion fijada longitudinalmente en una relacion de una con otra a la vez que permite el movimiento pivotante del conjunto de montaje 235 en relacion con el.
Con referencia a las Figuras 3A-3C, cada miembro de acoplamiento 246, 247 incluye un brazo de muelle 246c en voladizo que tiene un extremo distal 246d colocado para aplicarse en el conjunto de montaje 235. Mas espedficamente, la parte de montaje superior 236 incluye una superficie superior 236a que incluye un entrante 236b dimensionado para recibir el extremo distal 246d del brazo 246c del muelle de un respectivo miembro de acoplamiento 246. La parte de montaje inferior 238 incluye una superficie del fondo 238a que tiene un par de superficies elevadas 238b que definen un entrante 238c que esta dimensionado para recibir el brazo 247c del muelle de un respectivo miembro de acoplamiento 247. Alternativamente, al menos un entrante puede estar formado en el extremo proximal del conjunto 17 de herramientas.
Como se ha ilustrado en las Figuras 3D-3G, cuando los extremos distales de los brazos 246c, 247c del muelle de los miembros de acoplamiento 246, 247 estan colocados en los entrantes 236b y 238c de las partes de montaje superior e inferior 236 y 238, respectivamente, los brazos 246c, 247c del muelle retienen el conjunto de montaje 235 en una posicion no articulada. Los brazos 246c, 247c del muelle retendran el conjunto de montaje 235 en su posicion no articulada hasta que se aplique una fuerza predeterminada suficiente para desviar los brazos 246c del muelle desde los entrantes 236b y 238c para efectuar la articulacion del conjunto de montaje 235 y del conjunto 17 de herramientas. Cuando se aplica la fuerza predeterminada al conjunto de montaje 235 y al conjunto 17 de herramientas, los brazos 246c, 247c del muelle saltaran o se desviaran hacia fuera desde los entrantes 236b y 238c, como se ha mostrado en las Figuras 3E y 3G, para permitir el movimiento pivotante del conjunto de montaje 235 (y de este modo del conjunto 17 de herramientas) en relacion con el extremo distal de la parte proximal 200 del cuerpo de la DLU 16.
Como se ha discutido antes, los brazos 246c del muelle y los entrantes 236b y 238c mantienen el conjunto 17 de herramientas en su posicion no articulada hasta que se haya sido aplicada una fuerza predeterminada al conjunto de montaje 235 para desaplicar los brazos 246c, 247c del muelle de los entrantes 236b y 238c del conjunto de montaje 235. Se ha previsto que los brazos del muelle / entrantes podnan estar incorporados en cualquier dispositivo
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quirurgico articulado que incluyera grapadoras, agarradores, dispositivos de sellado impulsados, por ejemplo dispositivos de sellado RF, etc. Ademas, aunque se muestran dos brazos de muelle / entrantes, se puede disponer solamente un unico brazo del muelle. Por otra parte, el conjunto de herramientas articuladas no necesita formar parte de una DLU sino que mas bien puede ser soportado directamente sobre el extremo distal de un instrumento quirurgico. Por ejemplo, el conjunto de montaje puede estar asegurado de forma desmontable o no desmontable al conjunto de herramientas y asegurado directamente al extremo distal de un instrumento quirurgico.
La mitad superior 250 del alojamiento y la mitad inferior 252 del alojamiento estan contenidas dentro de un manguito exterior 251 de la parte 200 del cuerpo (Figura 3). La parte 200 del cuerpo incluye un recorte 251a dimensionado para recibir una protuberancia o saliente 250a formado en la mitad superior 250 del alojamiento. La colocacion del saliente 250a dentro del recorte 251a impide el movimiento axial y de rotacion de las mitades superior e inferior 250 y 252 del alojamiento dentro del manguito exterior 251 de la parte 200 del cuerpo. En una realizacion la protuberancia 250a tiene una configuracion sustancialmente rectangular que tiene una dimension axial mayor que la dimension lateral. La dimension axial mayor proporciona una mayor area superficial para impedir la rotacion de las mitades superior e inferior 250 y 252 del alojamiento dentro del manguito 251. Una parte proximal 250b de la protuberancia 250a esta en rampa. La parte 250b proximal en rampa permite que el manguito 251 sea deslizado sobre la protuberancia 250a cuando las mitades superior e inferior 250 y 252 del alojamiento estan situadas dentro del manguito 251. Se ha previsto que la protuberancia 250a pueda adoptar otras configuraciones, por ejemplo circular, cuadrada, triangular, etc, y con todo conseguir su funcion prevista. Ademas, la protuberancia 250a puede ser vuelta a colocar en cualquier sitio a lo largo de la mitad superior 250 del alojamiento o, en la alternativa, ser colocada en la mitad inferior 252 del alojamiento o parcialmente en cada mitad 250 y 252 del alojamiento.
El extremo proximal o punta de insercion 193 de la mitad superior 250 del alojamiento incluye unos resaltos 254 de aplicacion para aplicar de forma liberable el extremo distal de un instrumento quirurgico en un modo de tipo bayoneta (veanse las Figuras 1A y 7). Las mitades 250 y 252 del alojamiento definen un canal 400 para recibir en ellas de forma deslizante el conjunto de impulsion axial 212. Una barra articulada 256 de articulacion esta dimensionada para ser colocada de forma deslizante dentro de una ranura 402 formada entre las mitades 250 y 252 superior e inferior del alojamiento. Un par de conjuntos 255 de bloques en H estan colocados contiguos al extremo distal de la parte 200 del alojamiento y contiguos al extremo distal del conjunto de impulsion axial 212 para impedir la flexion lateral hacia fuera y el pandeo del conjunto de impulsion 212 durante la articulacion y el disparo del aparato 10 de grapado quirurgico. Cada conjunto 255 de bloque en H incluye un cuerpo flexible 255a que incluye un extremo proximal asegurado de forma fija a la parte 200 del cuerpo y un extremo distal asegurado de forma fija al conjunto de montaje 235 (Figura 3).
Un miembro de retencion 288 esta soportado en la seccion de aplicacion 270 del conjunto de impulsion axial 212. El miembro de retencion 288 incluye un par de dedos 288a que estan colocados de forma liberable dentro de las ranuras o entrantes 252a formados en la mitad inferior 252 del alojamiento. En funcionamiento, cuando la SULU 16 esta sujeta a un instrumento quirurgico y el conjunto de impulsion axial 212 es accionado mediante la aplicacion de una fuerza predeterminada a un miembro de accionamiento 516 del instrumento quirurgico 500 (Figura 11), el conjunto de impulsion axial 212 es avanzado distalmente para mover el conjunto de impulsion 212 y el miembro de retencion 288 distalmente. A medida que el miembro de retencion 288 es avanzado distalmente los dedos 288a son empujados desde los entrantes 252a para proporcionar una indicacion audible y tactil de que el instrumento quirurgico ha sido accionado. El miembro de retencion 288 esta disenado para impedir un accionamiento parcial no intencionado de la DLU 16, tal como durante el envfo, manteniendo el conjunto de impulsion axial 212 en una posicion fija dentro de la DLU 16 hasta que se haya aplicado una fuerza axial predeterminada al conjunto de impulsion axial 212.
El conjunto de impulsion axial 212 incluye una viga de impulsion alargada 266 que incluye una cabeza de trabajo distal 268 y una seccion de aplicacion proximal 270. En una realizacion la viga de impulsion 266 esta construida a partir de varias hojas de material apiladas. La seccion de aplicacion 270 incluye un par de dedos de aplicacion elasticas 270a y 270b que al montarse se aplican en un par de correspondientes ranuras de retencion formadas en el miembro de impulsion 272. El miembro de impulsion 272 incluye un orificio proximal 274 configurado para recibir el extremo distal de una varilla de control 520 (Figura 11) de un instrumento quirurgico cuando el extremo proximo de la DLU 16 esta aplicado en la parte 512 del cuerpo de un instrumento quirurgico 500.
Con referencia tambien a las Figuras 5-10, la DLU 16 incluye ademas un mecanismo de enclavamiento que incluye un miembro de enclavamiento 300 y un accionador 302 del miembro de enclavamiento. El miembro de enclavamiento 300 (Figura 6) esta soportado de forma rotatoria dentro de una ranura longitudinal o axial 310 (Figura 7) formada en una parte proximal de la mitad superior 250 del alojamiento de la parte 200 del cuerpo de la DLU 16. El miembro de enclavamiento 300 puede moverse desde una primera posicion (Figuras 7 y 8), en la que el miembro de enclavamiento 300 mantiene el conjunto de impulsion 212 en una posicion previa al disparo, hasta una segunda posicion (Figuras 9 y 10), en la que el conjunto de impulsion 212 es libre para moverse axialmente.
Como se ha ilustrado en la Figura 6, el miembro de enclavamiento 300 incluye un cuerpo semicilmdrico 312 que esta colocado de forma deslizante dentro de la ranura transversal 310 formada en la mitad superior 250 del alojamiento de la parte 200 del cuerpo. El cuerpo 312 incluye un miembro 314 de leva que se extiende radialmente hacia dentro y un dedo 316 que se extiende radialmente hacia dentro. El dedo 316 esta dimensionado para ser recibido de forma
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deslizante dentro de una muesca o ranura 270c (Figura 3) formada en el conjunto de impulsion 212. El dedo de aplicacion 316 en la muesca 270c del conjunto de impulsion 212 impide que el conjunto de impulsion 212 se mueva linealmente dentro de la parte 200 del cuerpo y de este modo impida el accionamiento de la DLU 16.
Con referencia a las Figuras 3, 5 y 7, un accionador 302 del miembro de enclavamiento esta colocado de forma deslizante dentro de una ranura axial 320 (Figura 7) formada en la mitad superior 250 del alojamiento de la parte 200 del cuerpo de la DLU 16. El accionador 302 incluye un miembro 322 de apoyo proximal, una grna distal 324 del muelle, y una ranura central 326 de leva. La ranura axial 320 intersecciona la ranura transversal 310 de modo que el miembro 314 de leva del miembro de enclavamiento 300 esta colocado de forma deslizante dentro de la ranura 326 de leva del accionador 302 del miembro de enclavamiento. Un miembro o muelle desviador 328 (Figura 7) esta colocado alrededor de la grna 324 del muelle entre una superficie distal 330 del accionador 302 y una pared 332 (Figura 7) que define el extremo distal de la ranura axial 320. El muelle 328 empuja el accionador 302 a su posicion replegada dentro de la ranura axial 320. En su posicion replegada el miembro de apoyo 322 esta colocado en y se extiende radialmente hacia fuera del extremo proximal de la DLU 16 de la punta de insercion 193 contigua de la parte proximal 200 del cuerpo y la ranura 326 de leva esta colocada para situar el miembro 314 de leva de modo que el dedo 316 del miembro de enclavamiento 300 se coloque dentro de la muesca 270c del conjunto de impulsion 212.
Las Figuras 11-15 ilustran la DLU 16 y el instrumento quirurgico 500 antes y durante la sujecion de la DLU 16 al instrumento quirurgico 500. Antes de la sujecion de la DLU 16 al instrumento quirurgico 500, el muelle 328 empuja el accionador 302 a su posicion replegada para mover el miembro de enclavamiento 300 a su posicion bloqueada como se ha discutido antes. Cuando la DLU 16 de la punta de insercion 193 es insertada linealmente en el extremo abierto 522 (Figura 11) de la parte 512 del cuerpo (Figura 13) de un instrumento quirurgico 500, los resaltos 254 se mueven linealmente a traves de las ranuras (no mostradas) formadas en el extremo abierto 522 de la parte 512 del cuerpo. A medida que los resaltos 254 atraviesan las ranuras, el extremo proximal 322a del miembro 322 de apoyo, el cual esta angularmente desplazado de los resaltos 254, hace tope en una pared 276c que define las ranuras para recibir los resaltos 254. A medida que la DLU 16 es movida posteriormente en la parte 512 del cuerpo, el accionador 302 del miembro de enclavamiento es movido desde su posicion replegada hasta su posicion avanzada en la direccion indicada por la flecha “T” en la Figura 14. A medida que el accionador 302 es movido hacia su posicion avanzada el miembro de enclavamiento 300 es empujado por la leva en la direccion indicada por la flecha “U” en la Figura 14 desde su posicion bloqueada (Figura 8) aplicada en el conjunto de impulsion 212 hasta su posicion desbloqueada (Figura 10) para mover el dedo 316 desde la muesca 270c. El mecanismo de enclavamiento que incluye el miembro de enclavamiento 300 y el accionador 302 del miembro de enclavamiento impide el avance o manipulacion no intencionados del miembro de impulsion de la DLU 16 tal como durante la carga de la DLU 16 en un instrumento quirurgico 500.
Cuando la DLU 16 ha sido movida linealmente en relacion al instrumento 500 hasta una posicion en donde una superficie proximal 530 de la parte 200 del cuerpo hace tope en la superficie interior 276c de la parte 512 del cuerpo (Figura 15), la DLU 16 puede ser rotada en relacion con la parte 512 del cuerpo en una accion de tipo bayoneta para colocar los resaltos 254 dentro de las aberturas 536 de la parte 512 del cuerpo para bloquear la DLU 16 sobre la parte 512 del cuerpo. Se ha previsto que se puedan usar otros tipos de acoplamiento ademas de los acoplamientos de bayoneta para conectar la DLU 16 al instrumento 500, por ejemplo unos acoplamientos de tipo reten de muelle o acoplamientos de ajuste por presion, acoplamientos de encaje por friccion, miembros de enclavamiento, acoplamientos roscados, etc.
En una realizacion de la presente descripcion ilustrada en las Figuras 16-20, un conjunto de enclavamiento 600 esta ilustrado para uso con el instrumento quirurgico 500 y la unidad de carga desechable 16 (vease por ejemplo la Figura 1). En las realizaciones ilustradas el conjunto de enclavamiento 600 incluye un alojamiento 602, un empujador 604, una varilla 606, una deslizadera 608, al menos un muelle 610, un dedo 612 de leva, una placa 614 de pivote que tiene unas ranuras 616 y una barra articulada 618. El conjunto de enclavamiento 600 generalmente ayuda al conjunto 17 de herramientas (vease la Figura 1, por ejemplo) a mantener su posicion durante el disparo del instrumento quirurgico 500.
Con referencia a las Figuras 16 y 17, una parte del conjunto de enclavamiento 600 esta al menos parcialmente contenida dentro del alojamiento 602. La Figura 16 ilustra el conjunto de enclavamiento 600 dispuesto en relacion con el alojamiento 602, mientras que la Figura 17 ilustra el conjunto de enclavamiento 600 aislado del alojamiento 602. En la realizacion ilustrada de la Figura 17 el empujador 604 es mostrado con la varilla 606 que se extiende distalmente de el. La deslizadera 608 se extiende distalmente desde la varilla 606 y esta en una relacion deslizable con ella, que de este modo permite que la deslizadera 608 se mueva axialmente con respecto a la varilla 606. El muelle 610 o par de muelles (no explfcitamente mostrados en esta realizacion) desvfa distalmente la deslizadera 608 de la varilla 606.
Con referencia ahora a las Figuras 18-20, estan ilustrados el dedo 612 de leva y la placa 614 de pivote. El dedo 612 de leva se extiende distalmente desde la deslizadera 608 y la placa 614 de pivote pueda estar dispuesta en el conjunto de montaje 235 (vease la Figura 3), por ejemplo. Se ha previsto que la placa 614 de pivote pueda estar dispuesta en o incorporada en una parte del conjunto 17 de herramientas. Una pluralidad de ranuras 616 (estan ilustradas cinco ranuras 616) estan dispuestas en la placa 614 de pivote y estan dimensionadas para aceptar al menos una parte del dedo 612 de leva en ella. Tras las diferentes cantidades de articulacion del conjunto 17 de
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herramientas (que incluye una articulacion no sustancial) con respecto a la parte 512 del cuerpo (vease la Figura 1, por ejemplo), el dedo 612 de leva esta aproximadamente alineado con una ranura individual 616 de la placa 614 de pivote. Las Figuras 18 y 19 ilustran el dedo 612 de leva sustancialmente alineado con una ranura central 616a (oculta a la vista en la Figura 19), y la Figura 20 ilustra el dedo 612 de leva sustancialmente alineado con una ranura lateral 616b.
La barra articulada 618, ilustrada en las Figuras 17 y 19, esta en aplicacion mecanica con la placa 614 de pivote y el dedo 612 de leva (en la Figura 18, la barra articulada ha sido retirada). La barra articulada 618 esta ilustrada con una abertura 620 y una ranura 622 (Figura 19). La abertura 620 esta en una relacion de pivotamiento con una protuberancia 624 en la placa 614 de pivote y la ranura 622 esta aplicada de forma deslizante con el dedo 612 de leva. Esta relacion facilita la articulacion de la placa 614 de pivote con respecto a la parte 512 del cuerpo y la traslacion longitudinal de la deslizadera 608 con respecto a la placa 614 de pivote.
En funcionamiento, tras al menos un accionamiento parcial de la empunadura movil 516 (vease por ejemplo la Figura 1), el empujador 604 es obligado distalmente, por ejemplo por medio de la varilla de control 520 (vease la Figura 11, por ejemplo), que de este modo provoca la traslacion distal del dedo 612 de leva al menos parcialmente a una ranura 616 de la placa 614 de pivote. Se ha previsto que la empunadura movil de accionamiento 516 para aproximar el conjunto 18 del cartucho y un conjunto 20 del yunque (vease la Figura 1A, por ejemplo) tambien funciona para trasladar el dedo 612 de leva distalmente. En tal realizacion, cuando el conjunto 17 de herramientas articuladas esta en su sitio y apretado en el tejido, ademas no se puede lograr una posterior articulacion (sin liberar la empunadura movil 516, por ejemplo). De este modo el miembro de enclavamiento 600 ayuda a mantener el conjunto 17 de herramientas articuladas en posicion con respecto a la parte 512 del cuerpo antes de colocar las grapas en el tejido, por ejemplo.
Como se ha discutido antes, el muelle 610 desvfa distalmente la deslizadera 608 de la varilla 606. Esta desviacion proporcionada por el muelle 610 ayuda a asegurar que el dedo 612 de leva no sea desalojado de forma accidental o prematura de la ranura 616 de la placa 614 de pivote, lo que puede dar como resultado una cantidad significativa de “juego” entre ellos. Adicionalmente, la desviacion distal proporcionada por el muelle 610 ayuda a eliminar las tolerancias de fabricacion y/o las holguras que estan presentes entre la deslizadera 608 y la placa 614 de pivote. Tambien se ha previsto que al menos una parte del dedo 612 de leva y/o la ranura 616 pueda tener una forma de cuna para ayudar a reducir un movimiento no intencionado entre ellas. En tal realizacion una parte distal del dedo 612 de leva y de la ranura 616 sena mas estrecha que una correspondiente parte proximal.
En una realizacion de la presente descripcion ilustrada en las Figuras 21 y 22, esta ilustrado un conjunto de enclavamiento 700 para uso con el instrumento quirurgico 500 y la unidad de carga desechable 16 (vease la Figura 1, por ejemplo). En la realizacion ilustrada, el conjunto de enclavamiento 700 incluye un adaptador 702, un empujador 704, un pivote 706, un elemento desviador (por ejemplo un par de muelles 708) y una barra articulada 710. El conjunto de enclavamiento 700 ayuda generalmente a mantener el conjunto 17 de herramientas en una posicion predeterminada.
Con referencia a la Figura 21, el adaptador 702 del conjunto de enclavamiento 700 esta generalmente alojado dentro de la parte 512 del cuerpo (vease la Figura 1, por ejemplo) del instrumento quirurgico 500 o dentro de la unidad de carga desechable 16. En la realizacion 704 ilustrada, el empujador esta colocado distalmente de un par de muelles 708. El empujador 704 es desviado distalmente por medio del par de muelles 708 hacia el pivote 706 del conjunto de herramientas articuladas 17. Una parte distal del empujador 704 incluye una superficie de contacto 712 del empujador (Figura 22) que esta formada y dimensionada para encajar con una superficie 714 de encaje del pivote (Figura 22) dispuesta contigua a una parte proximal del pivote 706. La barra articulada 710 esta ilustrada en cooperacion mecanica con una parte del empujador 704 y conectada pivotablemente con una parte del pivote 706, que de este modo permite que el conjunto de herramientas articuladas 17 se mueva entre su primera posicion y su segunda posicion con respecto a la parte 512 del cuerpo. Mas espedficamente, la barra articulada 710 incluye una abertura 711 que se ajusta sobre un saliente 707 del pivote 706, lo que de este modo permite el movimiento de pivotamiento entre ellos. Ademas, la barra articulada 710 esta aplicada de forma deslizante con una parte 702 del adaptador, lo que permite el movimiento de longitudinal entre ellos.
Con referencia ahora a la Figura 22, la superficie de contacto 712 del empujador es sustancialmente plana a lo largo de la mayor parte de su longitud en esta realizacion. En la misma medida, la superficie de contacto 714 es tambien plana a lo largo de la mayor parte de su longitud en la realizacion ilustrada. De este modo, la desviacion distal del empujador 704 hacia el pivote 706 (en la direccion de la flecha A) por medio del par de muelles 708, ayuda a mantener el conjunto de herramientas articuladas 17 en su posicion primera no articulada, al igual que la fuerza de desviacion ayuda al conjunto de herramientas articuladas 17 a resistir el pivotamiento. Mientras que dos muelles 708 estan ilustrados, se pueden disponer mas o menos muelles 708.
Para pivotar la herramienta 17 de articulacion desde su primera posicion no articulada, se debe superar la fuerza de desviacion distal de un par de muelles 708. Tal accion de pivotamiento mueve el empujador 704 proximalmente (en la direccion de la flecha B) contra la desviacion del par de muelles 708. Tambien se ha previsto que la superficie de contacto 714 del empujador incluya unos retenes (no mostrados explfcitamente en esta realizacion) para ayudar a estabilizar el miembro 17 de la mandfbula articulada en unas posiciones articuladas seleccionadas.
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Con referencia continuada a la Figura 22, el pivote 706 incluye una repisa 716 sobre el. Como se ha mostrado en la Figura 22, la repisa 716 se solapa al menos con una parte del empujador 704 cuando la superficie de encaje 712 del empujador esta en contacto con la superficie de encaje 714 del pivote. La repisa 716 esta situada y configurada para ayudar a impedir que el tejido sea totalmente comprimido entre el empujador 704 y el pivote 706 cuando el conjunto 17 de herramientas articuladas es rotado y/o articulado.
En una realizacion de la presente descripcion ilustrado en las Figuras 23-25, esta ilustrada una viga de impulsion multicapa 750 que tiene una pluralidad de capas 750a-750e y puede ser incluida en una unidad de carga desechable 16 (vease la Figura 1, por ejemplo). Tambien se ha ilustrado un aparato de cierre 760, tal como un arco en forma de I. El aparato de cierre 760 incluye una parte horizontal 762 que es avanzable en la superficie 42 de leva (u otra superficie de contacto) para aproximar el conjunto 17 de herramientas como se ha descrito en detalle con referencia a la Figura 2.
Con referencia a la Figura 24, esta ilustrada una viga de impulsion multicapa 750 que tiene cinco capas 750a-750e. Se ha previsto, y dentro del alcance de la presente descripcion, que se puedan usar mas o menos capas para formar una viga de impulsion multicapa 750. Tambien se ha previsto que la viga de impulsion multicapa 750 pueda sustituir a la viga de impulsion 266 en otras realizaciones de esta descripcion. El uso de la viga de impulsion multicapa 750 puede proporcionar una solidez y flexibilidad mayores durante el uso, espedficamente, por ejemplo, mientras el conjunto 17 de herramientas esta en una posicion articulada.
En las Figuras 23-25 esta ilustrada una pluralidad de recortes 770 que se extienden a traves de cada capa de la viga de impulsion multicapa 750. Aunque las figuras muestran entre cinco y diez recortes por capa de la viga de impulsion multicapa 750, el numero exacto de recortes 770 puede ser menor de cinco, entre cinco y diez, o mayor de diez. Adicionalmente, los recortes 770 de capas contiguas de la viga de impulsion 750 pueden estar alineados o no entre sf. El uso de los recortes 770 reduce las dimensiones de la seccion recta de la viga de impulsion 750 y facilita el ajuste de la fuerza de flexion. Mientras que estan ilustrados los recortes rectangulares 770, tambien se ha contemplado el uso de recortes 770 que tengan otras formas regulares o no regulares.
La sujecion de cada capa 750a-750e de la viga de impulsion multicapa 750 y la sujecion al aparato de cierre 760 estan ilustradas en la Figura 25. En la realizacion ilustrada una capa exterior (750a o 750e de la Figura 24) esta adherida al aparato de cierre 760 en dos lugares (en donde cada lugar esta indicado por el numero 780 en la Figura 25), por medio de un par de puntos de soldadura, por ejemplo. Tambien se ha previsto que cada capa exterior 750a, 750e incluya una abertura 776 que se ajuste sobre una protuberancia 778 que sobresale del aparato de cierre 760. Cada capa exterior 750a, 750e esta tambien adherida a una capa contigua (por ejemplo, 750b o 750d) en dos lugares (en donde cada lugar esta indicado por el numero 781 en la Figura 25), posiblemente por medio de un par de puntos de soldadura. Ademas, cada capa interior (por ejemplo, 750b, 750c y 750d) esta sujeta a una capa interior contigua (por ejemplo, la 750b esta sujeta a la 750c; la 750c esta sujeta a la 750b y a la 750d; y la 750d esta sujeta a la 750c) en dos lugares, por medio de puntos de soldadura, por ejemplo. Mientras que la soldadura por puntos es descrita como un metodo de sujecion, otros metodos para sujetar cada capa a cada una de las otras y las capas exteriores al aparato de cierre estan previstos y dentro del alcance de la presente descripcion. Las realizaciones ilustradas muestran los puntos de sujecion 780 de las capas interiores contiguas al aparato de cierre 760, pero se ha previsto, y dentro del alcance de la presente descripcion, que los puntos de sujecion 780 esten dispuestos en otros lugares en la viga de impulsion 750. Adicionalmente, se ha previsto que al menos una capa de la viga de impulsion 750 este hecha de un metal, tal como acero inoxidable. Las partes de la viga de impulsion 750 y/o del aparato de cierre 760 pueden tambien estar hechas de, o al menos parcialmente recubiertas, de un material plastico, como se describe mas adelante. Ademas, el aparato de cierre 790 puede incluir una superficie de corte 766 (Figura 23) en el para cortar el tejido.
En una realizacion de la presente descripcion ilustrada en las Figuras 26 y 27 se muestran un aparato de cierre 800 y una parte de la viga de impulsion 802. El aparato de cierre y/o una superficie de contacto (por ejemplo, la superficie 42 de leva) del conjunto 17 de herramientas (vease la Figura 2, por ejemplo) puede incluir una superficie plastica o un recubrimiento plastico. En esta realizacion el aparato de cierre 800 esta ilustrado con un par de tapas 804 que al menos parcialmente cubren las partes horizontales 806 del aparato de cierre 800. Las tapas 804 pueden estar hechas de plastico en esta realizacion. Tales superficies de plastico dispuestas en el aparato de cierre 800 y/o la superficie de contacto del conjunto 17 de herramientas generalmente reduce la cantidad de friccion entre ellas frente a las dos superficies de metal. Esto es, una interaccion de plastico con metal o de plastico con plastico puede crear menos friccion que la interaccion entre un par de superficies de metal. Esta cantidad de friccion reducida puede corresponder a una fuerza de disparo reducida.
Se ha previsto que una parte del aparato de cierre 800, tal como el par de tapas 804, este hecha de plastico, sobremoldeada con plastico o que incluya un recubrimiento plastico. Adicionalmente, una superficie de contacto del conjunto 17 de herramientas, o al menos una parte de ella, puede tambien estar hecha de plastico, estar sobremoldeada con plastico o incluir un recubrimiento plastico.
En una realizacion de la descripcion el aparato de cierre 800 puede incluir una seccion recta en forma de I, como se ha ilustrado en las Figuras 26 y 27. Adicionalmente, el aparato de cierre 800 y la viga de impulsion 802 pueden ser parte de una unidad de carga desechable 16 y/o parte de un instrumento quirurgico 500 que sea capaz de articular.
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Ademas, la viga de impulsion 802 puede incluir una unica capa o una pluralidad de capas (como se ha mostrado en la Figura 26) y al menos una parte de la viga de impulsion 802 puede estar hecha de plastico. Todavfa mas, el aparato de cierre 800 puede incluir una superficie de corte 808 (Figura 27) en el para cortar el tejido.
Con referencia continuada a las Figuras 26 y 27, la tapa de plastico 804 puede incluir una seccion reforzada 810 que puede aumentar la solidez del aparato de cierre 800 o puede proporcionar una conexion mas fuerte entre la tapa 804 y la parte horizontal 806 del aparato de cierre 800. Tambien se ha previsto que la tapa 804 pueda estar sujeta de forma desmontable al aparato de cierre 800. En tal realizacion, la tapa 804 puede ser retirada y sustituida si ocurriese cualquier deterioro o dano sustancial.
En una realizacion de la presente descripcion ilustrada en las Figuras 28 y 29, se ilustra un conjunto de herramientas 850. El conjunto de herramientas 850 de esta realizacion incluye un canal 852, un primer miembro de sujecion 860, un segundo miembro de sujecion 870, un conjunto de yunque 880, una primera varilla de sujecion 890 y una segunda varilla de sujecion 892. Las varillas de sujecion primera y segunda 890, 892 proporcionan una fuerte conexion que facilita que los elementos del conjunto de herramientas 850 permanezcan juntos.
El canal 852 incluye una abertura 854 (estan ilustradas dos aberturas) contigua a su extremo proximal y el primer miembro de sujecion 860 incluye una protuberancia 862 (estan ilustradas dos protuberancias) que se extiende desde el. El canal 852 es conectable a un primer miembro de sujecion colocando la o las aberturas 854 sobre la o las protuberancias 862, que de este modo proporcionan una conexion de pivotamiento entre ellos. A pesar de que no esta explfcitamente ilustrado en la presente realizacion, el canal 852 puede alojar una pluralidad de fijadores quirurgicos o un cartucho de grapas.
El conjunto del yunque 880 incluye una cubierta 882 del yunque y un yunque 886. El yunque 886 esta configurado para aplicacion mecanica con la cubierta 882 del yunque, por ejemplo por medio de una conexion de ajuste por presion. Una abertura 884 se extiende al menos parcialmente a traves de una parte de la cubierta 882 del yunque. La abertura 884 esta configurada para ajustarse sobre un saliente 872 dispuesto en un segundo miembro de sujecion 870, que de este modo proporciona una conexion entre el conjunto 880 del yunque y el segundo miembro de sujecion 870. Adicionalmente, la cubierta 882 del yunque incluye al menos una abertura 888 que se extiende, al menos parcialmente, a traves de ella en una realizacion de la descripcion. La abertura 888 esta configurada para ajustarse sobre la protuberancia 862 del primer miembro de sujecion 860. En tal realizacion, el conjunto 880 del yunque puede ser pivotado con respecto al primer miembro de sujecion 860 y al segundo miembro de sujecion 870.
El primer miembro de sujecion 860 incluye una primera abertura 864 y una segunda abertura 866 que se extienden a traves de el. El segundo miembro de sujecion 870 incluye tambien una primera abertura 874 y una segunda abertura 876 que se extienden a traves de el (Figura 29). Ademas, el primer miembro de sujecion 860 y el segundo miembro de sujecion 870 estan en aplicacion mecanica, de modo que las primeras aberturas 864, 874 se alinean sustancialmente y las segundas aberturas 866, 876 se alinean sustancialmente.
Para asegurar el primer miembro de sujecion 860 con el segundo miembro de sujecion 870 (y de este modo el canal 852 y el conjunto 880 del yunque), la primera varilla de sujecion 890, o una parte de ella, es insertada a traves de las primeras aberturas 864 y 874. Para asegurar ademas los elementos del conjunto de herramientas 850, la segunda varilla de sujecion 892, o una parte de ella, es insertada a traves de las segundas aberturas 866 y 876. Se ha previsto que la primera varilla de sujecion 890 y/o la segunda varilla de sujecion 892 sean roblones, tales como roblones de dos partes que sean apretables.
En una realizacion de la descripcion, el conjunto de herramientas 850 es parte de una unidad de carga desechable, que puede ser capaz de articular. La articulacion del conjunto de herramientas 850 puede ser facilitada por el conjunto de herramientas 850 de sujecion pivotable a una parte del cuerpo de un instrumento quirurgico por medio del saliente 874 que se extiende desde un segundo miembro de sujecion 870 y una barra articulada (tal como la barra articulada 710 en la Figura 21). Adicionalmente, un metodo para montar el conjunto de herramientas 850, como se ha descrito antes, esta contemplado por la presente descripcion.
Se comprendera que se pueden hacer varias modificaciones en las realizaciones aqrn descritas. Por ejemplo, el conjunto de enclavamiento antes descrito puede ser incorporado en una variedad de instrumentos quirurgicos que incluyen las DLUs y no esta limitado al uso en grapadoras lineales. Ademas, la DLU puede ser configurada para recibir una punta de insercion de un instrumento quirurgico distinto del descrito. Por lo tanto, la anterior descripcion no debena ser interpretada como limitativa sino simplemente como unas ejemplificaciones de las diversas realizaciones. Los expertos en la tecnica preveran otras modificaciones dentro del alcance de las reivindicaciones aqrn anejas.
Claims (4)
- 51015202530
- 2.plastico.
- 3.(810).
- 4.REIVINDICACIONESUn instrumento quirurgico (500), que comprende: una parte (510) de la empunadura;una parte (512) del cuerpo que se extiende distalmente desde la parte de la empunadura y que define un primer eje longitudinal;una empunadura movil (516) dispuesta en la parte de la empunadura y en cooperacion mecanica con un miembro de impulsion (272);un conjunto (17) de herramientas que incluye un yunque (20), un conjunto (18) del cartucho y una superficie de contacto, estando soportado el conjunto de herramientas contiguo a un extremo distal de la parte del cuerpo;una viga de impulsion (750, 802) que incluye una pluralidad de capas (750a-750e), teniendo al menos una capa una parte proximal de aplicacion dispuesta contigua a un extremo proximal de ella y que esta configurada para aplicarse en una parte del miembro de impulsion (272);un aparato de cierre (800) dispuesto contiguo a un extremo distal de la viga de impulsion, incluyendo el aparato de cierre una superficie de corte (766, 808) en el, una seccion recta del aparato de cierre tiene generalmente forma de I con partes horizontales, estando configuradas dichas partes horizontales para aplicarse en la superficie de contacto del conjunto (17) de herramientas, por lo que al menos un accionamiento parcial de la empunadura movil mueve el aparato de cierre distalmente hasta aplicacion con la superficie de contacto para aproximar el yunque (20) y el conjunto (18) del cartucho; yincluyendo la viga de impulsion (750, 802) entre cuatro capas y seis capas, estando hecha al menos una capa de la viga de impulsion de acero inoxidable, donde cada una de la pluralidad de capas (750a-750e) de la viga de impulsion incluye al menos un corte (770) dispuesto a traves, siendo la viga de impulsion parte de una unidad de carga desechable, ycaracterizado por que partes del aparato de cierre (800) comprenden una superficie plastica proporcionada por un recubrimiento plastico, plastico sobremoldeado o tapas (804) de plastico que cubren al menos parcialmente dichas partes horizontales (806).El instrumento quirurgico de la reivindicacion 1, en donde el aparato de cierre tiene una tapa (804) de El instrumento quirurgico de la reivindicacion 2, en donde la tapa de plastico tiene una seccion reforzada El instrumento quirurgico de la reivindicacion 1, en donde se articula el conjunto (17) de herramientas.
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