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ES2396594T3 - Instrumento quirúrgico que tiene una superficie de plástico - Google Patents

Instrumento quirúrgico que tiene una superficie de plástico Download PDF

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Publication number
ES2396594T3
ES2396594T3 ES08252893T ES08252893T ES2396594T3 ES 2396594 T3 ES2396594 T3 ES 2396594T3 ES 08252893 T ES08252893 T ES 08252893T ES 08252893 T ES08252893 T ES 08252893T ES 2396594 T3 ES2396594 T3 ES 2396594T3
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assembly
surgical instrument
flange part
tool assembly
lower flange
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Paul A. Scirica
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Covidien LP
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Tyco Healthcare Group LP
Covidien LP
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B17/07207Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/10Surgical instruments, devices or methods for applying or removing wound clamps, e.g. containing only one clamp or staple; Wound clamp magazines
    • A61B17/105Wound clamp magazines
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B2017/00017Electrical control of surgical instruments
    • A61B2017/00115Electrical control of surgical instruments with audible or visual output
    • A61B2017/00128Electrical control of surgical instruments with audible or visual output related to intensity or progress of surgical action
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B2017/0023Surgical instruments, devices or methods disposable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B2017/0046Surgical instruments, devices or methods with a releasable handle; with handle and operating part separable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B2017/0046Surgical instruments, devices or methods with a releasable handle; with handle and operating part separable
    • A61B2017/00473Distal part, e.g. tip or head
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B2017/00831Material properties
    • A61B2017/0084Material properties low friction
    • A61B2017/00845Material properties low friction of moving parts with respect to each other
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214Stapler heads
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214Stapler heads
    • A61B2017/07285Stapler heads characterised by its cutter
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2927Details of heads or jaws the angular position of the head being adjustable with respect to the shaft
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2932Transmission of forces to jaw members
    • A61B2017/2933Transmission of forces to jaw members camming or guiding means
    • A61B2017/2936Pins in guiding slots
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2946Locking means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/32Surgical cutting instruments
    • A61B2017/320052Guides for cutting instruments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336Coating a portion of the article, e.g. the edge of the article
    • B29C45/14344Moulding in or through a hole in the article, e.g. outsert moulding

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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

Instrumento (500) quirúrgico que comprende: una parte (510) de mango; una parte (512) de cuerpo que se extiende distalmente desde la parte (510) de mango; y un conjunto (17) de herramienta soportado en un extremo distal de la parte (512) de cuerpo, incluyendo elconjunto (17) de herramienta un conjunto (18) de cartucho, y un conjunto (20) de yunque soportado adyacente al conjunto(18) de cartucho, pudiendo moverse el conjunto (20) de yunque en relación con el conjunto (18) de cartucho desdeuna posición abierta hasta una posición cerrada, incluyendo además el conjunto (17) de herramienta un elemento (800')de cierre que tiene una parte (802') de reborde superior y una parte (804') de reborde inferior interconectadas medianteuna parte (806') de barra vertical, pudiendo moverse el elemento (800') de cierre en relación con el conjunto (17) deherramienta para mantener un hueco de tejido deseado adyacente al elemento (800') de cierre, caracterizado porque al menos una de la parte (802') de reborde superior y la parte (804') de reborde inferiorincluye una superficie (807') externa, una superficie (808') interna y un orificio (822'), extendiéndose el orificio entrela superficie (807') externa y la superficie (808') interna, en el que un material (812') que tiene un coeficiente de fricciónbajo está situado dentro del orificio (822') y en al menos una parte de la superficie (808') interna de al menos una de laparte (802') de reborde superior y la parte (804') de reborde inferior.

Description

Instrumento quirurgico que tiene una superficie de plastico
Antecedentes
Campo tecnico
5 La presente descripcion se refiere a un instrumento quirurgico y una unidad de carga desechable que incluyen una superficie de plastico sobre los mismos. Mas particularmente, la presente descripcion se refiere a un instrumento quirurgico que incluye una superficie de plastico en al menos uno de un aparato de cierre y una superficie de contacto de un conjunto de herramienta.
Antecedentes
10 Los dispositivos quirurgicos en los que en primer lugar se agarra o sujeta tejido entre una estructura de mordazas opuestas y despues se une mediante elementos de fijacion quirurgicos se conocen ampliamente en la tecnica. En algunos instrumentos, se proporciona una cuchilla para cortar el tejido que se ha unido mediante los elementos de fijacion. Los elementos de fijacion estan normalmente en forma de grapas quirurgicas pero tambien pueden utilizarse elementos de fijacion polimericos de dos piezas.
15 Los instrumentos para este fin pueden incluir dos elementos alargados que se usan respectivamente para capturar o sujetar el tejido. Normalmente, uno de os elementos porta un cartucho de grapas que aloja una pluralidad de grapas dispuestas en al menos dos filas laterales mientras que el otro elemento tiene un yunque que define una superficie para formar las patas de grapa a medida que las grapas se accionan desde el cartucho de grapas. En algunos instrumentos, el cierre de los dos elementos alargados, o conjunto de herramienta, se ve afectado por la actuacion de un mango movil
20 que mueve una barra de accionamiento que tiene un aparato de cierre sobre la misma a una superficie de contacto de un conjunto de herramienta, aproximando asi los elementos del conjunto de herramienta. Puede haber una fuerza de friccion grande entre el aparato de cierre y la superficie de contacto del conjunto de herramienta, requiriendose posiblemente asi que se aplique una cantidad relativamente grande de fuerza al mango movil.
El documento EP 1 702 568 da a conocer un conjunto de herramienta para una grapadora quirurgica. El conjunto de
25 herramienta tiene un yunque, un conjunto de cartucho, un collar y un elemento de sujecion dinamico. El elemento de sujecion dinamico incluye un pasador que se engancha con el yunque. El preambulo de la reivindicacion 1 adjunta se basa en su descripcion.
Sumario
Segun la presente invencion se proporciona un instrumento (500) quirurgico que comprende: una parte (510) de mango;
30 una parte (512) de cuerpo que se extiende distalmente desde la parte (510) de mango; y un conjunto (17) de herramienta soportado en un extremo distal de la parte (512) de cuerpo, incluyendo el conjunto (17) de herramienta un conjunto
(18) de cartucho, y un conjunto (20) de yunque soportado adyacente al conjunto (18) de cartucho, pudiendo moverse el conjunto (20) de yunque en relacion con el conjunto (18) de cartucho desde una posicion abierta hasta una posicion cerrada, incluyendo ademas el conjunto (17) de herramienta un elemento (800') de cierre que tiene una parte (802') e re
35 borde superior y una parte (804') de reborde inferior interconectadas mediante una parte (806') de barra vertical, pudiendo moverse el elemento (800') de cierre en relacion con el conjunto (17) de herramienta para mantener un hueco de tejido deseado adyacente al elemento (800') de cierre, caracterizado porque al menos una de la parte (802') de reborde superior y la parte (804') de reborde inferior incluye una superficie (807') externa, una superficie (808') interna y un orificio (822'), extendiendose el orificio entre la superficie (807') externa y la superficie (808') interna, en el que un material
40 (812') que tiene un coeficiente de friccion bajo esta situado dentro del orificio (822') y en al menos una parte de la superficie (808') interna de al menos una de la parte (802') de reborde superior y la parte (804') de reborde inferior.
En una realizacion, el material moldeable es plastico.
En una realizacion, la parte de reborde incluye una parte de reborde superior y una parte de reborde inferior que estan interconectadas mediante la parte de barra vertical.
45 En una realizacion, el orificio se proporciona a traves de tanto la parte de reborde superior como la parte de reborde inferior, y el material moldeable se inyecta a traves de cada uno de los orificios en las parte de reborde superior e inferior.
En una realizacion, la superficie interna de cada una de las partes de reborde superior e inferior define al menos un rebaje y el material moldeable se inyecta en los rebajes a traves de los orificios.
Descripcion de los dibujos
50 En el presente documento se dan a conocer diversas realizaciones del instrumento quirurgico dado a conocer por la presente, con referencia a los dibujos, en los que:
la figura 1 es una vista en perspectiva lateral desde el extremo distal de una realizacion del instrumento quirurgico dado a conocer por la presente con un conjunto de herramienta articulado;
la figura 1A es una vista en perspectiva lateral desde el extremo proximal de una unidad de carga desechable (DLU) del instrumento quirurgico mostrado en la figura 1 que incluye el conjunto de herramienta;
la figura 2 es una vista en perspectiva lateral del extremo distal del conjunto de montaje y el conjunto de herramienta, con piezas separadas, de la DLU del instrumento quirurgico mostrado en la figura 1;
la figura 3 es una vista en perspectiva lateral del conjunto de montaje y la parte de cuerpo proximal de la DLU mostrada en la figura 1A con piezas separadas;
la figura 3A es una vista enperspectiva lateral de un elemento de acoplamiento del instrumento quirurgico mostrado en la figura 1;
la figura 38 es una vista en perspectiva lateral 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 en perspectiva lateral 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 en perspectiva lateral desde arriba de la parte de cuerpo proximal, el conjunto de montaje y el conjunto de herramienta de la DLU del instrumento quirurgico con el conjunto de herramienta en su posicion no articulada;
la figura 3E es una vista en perspectiva lateral desde arriba de la parte de cuerpo proximal, el conjunto de montaje y el conjunto de herramienta mostrados en la figura 3D con el conjunto de herramienta en una posicion articulada;
la figura 3F es una vista en perspectiva lateral desde abajo de la parte de cuerpo proximal, el conjunto de montaje y el conjunto de herramienta de la DLU del instrumento quirurgico con el conjunto de herramienta en su posicion no articulada;
la figura 3G es una vista en p erspectiva lateral desde abajo de la parte de cuerpo proximal, el conjunto de montaje y el conjunto de herramienta mostrados en la figura 3F con el conjunto de herramienta en una posicion articulada;
la figura 4 es una vista en seccion transversal lateral del conjunto de herramienta de la DLU mostrada en la figura 1A;
la figura 5 es una vista en perspectiva desde arriba del actuador de elemento de bloqueo del mecanismo de bloqueo de parte de cuerpo proximal mostrado en la figura 3;
la figura 6 es una vista en perspectiva desde abajo de un elemento de bloqueo del mecanismo de bloqueo mostrado en la figura 3;
la figura 7 es una vista desde arriba del extremo proximal de la parte de cuerpo proximal de DLU mostrada en la figura 1A con el mecanismo de bloqueo en su posicion bloqueada;
la figura 8 es una vista en seccion transversal tomada a lo largo de las lineas de seccion 88 de la figura 7;
la figura 9 es una vista desde arriba del extremo proximal de la parte de cuerpo proximal de DLU mostrada en la figura 1A con el mecanismo de bloqueo en su posicion desbloqueada;
la figura 10 es una vista en seccion transversal tomada a lo largo de las lineas de seccion 1010 de la figura 9;
la figura 11 esuna vista en perspectiva lateral de la DLU y del instrumento quirurgico mostrados en la figura 1 antes de la union de la DLU al instrumento quirurgico;
la figura 12 es una vista desde arriba del extremo proximal de la DLU y el extremo distal del instrumento quirurgico mostrados en la figura 11 antes de la union 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 se hace avanzar de manera lineal al interior del extremo distal del instrumento quirurgico;
la figura 14 es una vista desde arriba del extremo proximal de la DLU y el extremo distal del instrumento quirurgico mostrados en la figura 12 despues de haber hecho avanzar la DLU de manera lineal pero antes de bloquear la DLU al instrumento quirurgico;
la figura 15 es una vista desde arriba del extremo proximal de la DLU y el extremo distal del instrumento quirurgico mostrados en la figura 13 despues de haber hecho avanzar la DLU de manera lineal y bloqueada de manera rotatoria sobre el instrumento quirurgico;
la figura 16 es una vista en perspectiva de un conjunto de bloqueo para su uso con un instrumento quirurgico segun una realizacion de la presente descripcion;
la figura 17 es una vista en perspectiva de diversos componentes del conjunto de bloqueo de la figura 16;
la figura 18 es una vista en perspectiva ampliada de una parte del conjunto de bloqueo de las figuras 16 y 17 ilustrado con el conjunto de herramienta articulado en una posicion no articulada;
la figura 19 es una vista en perspectiva ampliada de una parte del conjunto de bloqueo de las figuras 1618 y que incluye una pieza de conexion;
la figura 20 es una vista en perspectiva ampliada de una parte del conjunto de bloqueo de las figuras 1619 ilustrado con el conjunto de herramienta articulado en una posicion articulada;
la figura 21 es una vista en perspectiva ampliada de otro conjunto de bloqueo para su uso con un instrumento quirurgico segun una realizacion de la presente descripcion;
la figura 22 es una vista en perspectiva desde abajo ampliada del conjunto de bloqueo de la figura 21;
la figura 23 es una vista en perspectiva de una barra de accionamiento que tiene una pluralidad de capas y un aparato de cierre segun una realizacion de la presente descripcion;
la figura 24 es una vista en perspectiva de la barra de accionamiento yel aparato de cierre de la figura 23 con piezas separadas;
la figura 25 es una vista en seccion transversal de una parte de la barra de accionamiento yel aparato de cierre de las figuras 23 y 24;
la figura 26 es una vista en seccion transversal de una barra de accionamiento y un aparato de cierre segun una realizacion de la presente descripcion;
la figura 27 es una vista en seccion transversal de la barra de accionamiento y el aparato de cierre de la figura 26;
la figura 27a es una vista en perspectiva de un elemento de cierre segun una realizacion de la presente invencion;
la figura 27b es una vista en seccion transversal del elemento de cierre mostrado en la figura 27a tomada a lo largo de las lineas de seccion 27b27b de la figura 27a;
la figura 27c es una vista en perspectiva del elemento de cierre mostrado en la figura 27a antes de la union de la pieza de insercion;
la figura 27d es una vista en seccion transversal del elemento de cierre tomada a lo largo de las lineas de seccion 27d27d de la figura 27c;
la figura 28 es una vista en perspectiva de un conjunto de herramienta segun una realizacion de la presente descripcion; y
la figura 29 es una vista de conjunto del conjunto de herramienta de la figura 28.
Descripcion detallada de realizaciones
Ahora se describiran en detalle realizaciones del instrumento quirurgico y DLU dado a conocer por la presente con referencia a los dibujos, en los que los numeros de referencia similares designan elementos identicos o correspondientes en cada una de las diversas vistas.
Haciendo referencia a la figura 1, el instrumento 500 quirurgico incluye una parte 510 de mango, una parte 512 de cuerpo y una unidad de carga desechable ("DLU") 16. La parte 510 de mango incluye un mango 514 estacionario y un mango movil o disparador 516. El mango 516 movil puede moverse en relacion con el mango 514 estacionario para hacer avanzar una varilla 520 de control que sobresale desde el extremo distal de la parte 512 de cuerpo. La parte 510 de mango y la parte 512 de cuerpo pueden construirse de la manera dada a conocer en la patente estadounidense n.D
6.330.965 . Alternativamente, pueden usarse otros instrumentos quirurgicos con DLU 16 para realizar procedimientos quirurgicos endoscopicos.
Haciendo referencia a las figuras 1 y 1A, en resumen, la DLU 16 incluye un conjunto 17 de herramienta, una parte 200 de cuerpo proximal y un conjunto 202 de montaje. La parte 200 de cuerpo tiene un extremo proximal adaptado para engancharse de manera liberable con el extremo distal de un instrumento 500 quirurgico (figura 11) dela manera que se comentara en detalle mas adelante. El conjunto 202 de montaje esta fijado de manera pivotante a un extremo distal de la parte 200 de cuerpo y esta fijado de manera firme a u n extremo proximal del conjunto 17 de herramienta. El movimiento de pivote del conjunto 202 de montaje con respecto a un eje perpendicular a un eje longitudinal de la parte 200 de cuerpo afecta a la articulacion del conjunto 17 de herramienta entre una posicion no articulada en la que el eje longi
tudinal del conjunto 17 de herramienta esta alineado con el eje longitudinal de la parte 200 de cuerpo y una posicion articulada en la que el eje longitudinal del conjunto 17 de herramienta esta dispuesto en angulo con respecto al eje longitudinal de la parte 200 de cuerpo.
Haciendo referencia a las figuras 24, el conjunto 17 de herramienta incluye un conjunto 18 de cartucho y un conjunto 20 de yunque. El conjunto 20 de yunque incluye una parte 28 de yunque que tiene una pluralidad de concavidades 30 de deformacion de grapas (figura 4) y una placa 32 de cubierta fijada a una superficie superior de la parte 28 de yunque. La placa 32 de cubierta y la parte 28 de yunque definen una cavidad 34 (figura 4) entre las mismas que esta dimensionada para recibir un extremo distal de un conjunto 212 de accionamiento (figura 3). La placa 32 de cubierta encierra el extremo distal del conjunto 212 de accionamiento para impedir que se pellizque tejido durante la actuacion de la DLU 16. Una ranura 38 longitudinal se extiende a traves de la parte 28 de yunque para facilitar el paso de un reborde 40 de retencion del conjunto 212 de accionamiento. Una superficie 42 de levaformada en la parte 28 de yunqueesta situadapara engancharse con un par de elementos 40a de leva soportados en el reborde 40 de retencion del conjunto 212 de accionamiento para efectuar la aproximacion de los conjuntos de yunque y de cartucho. Seforman un par de elementos 44de pivote. Un par de elementos 50 de estabilizacion se enganchan con un respectivo hombro 52 formado en un portador 48 para impedir que la parte 28 de yunque se deslice axialmente en relacion con el cartucho 54 de grapas a medida que se hace pivotar la superficie 42 de leva con respecto a los elementos 44 de pivote.
El conjunto 18 de cartucho incluye un portador 48 que define un canal 56 de soporte alargado que esta dimensionado y configurado para recibir el cartucho 54 de grapas. Lenguetas 58y ranuras 60 correspondientes formadas a lo largo del cartucho 54 de grapas y el canal 56 de soporte alargado, respectivamente, funcionan para retener el cartucho 54 de grapas en una ubicacion fija dentro del canal 56 de soporte. Un par de puntales 62 de soporte formados en el cartucho 54 de grapas estan situados para descansar en paredes laterales del portador 48 para estabilizar adicionalmente el cartucho 54 de grapas dentro del canal 56 de soporte. El portador 48 tiene ranuras 46 para recibir elementos 44 de pivote de la parte 28 de yunque y permitir que la parte 28 de yunque se mueva entre posiciones separadas y aproximadas.
El cartucho 54 de grapas incluye ranuras 64 de retencion (figura 2) para recibir una pluralidad de grapas o elementos 66 de fijacion y empujadores 68. Una pluralidad de ranuras 70 longitudinales distanciadas lateralmente se extienden a traves del cartucho 54 de grapas para albergar cufas 72 de leva verticales de una rastra 74 de actuacion (figura 2). Una ranura 76 longitudinal central se extiende a lo largo de sustancialmente la longitud del cartucho 54 de grapas para facilitar el paso de una hoja 78 de cuchilla (figura 4). Durante el funcionamiento de la grapadora 10 quirurgica, el conjunto 212 de accionamiento hace tope con la rastra 74 de actuacion y empuja la rastra 74 de actuacion a traves de ranuras 70 longitudinales del cartucho 54 de grapas para hacer avanzar las cufas 72 de leva a un contacto secuencial con los empujadores 68. Los empujadores 68 se trasladan verticalmente a lo largo de las cufas 72 de leva dentro de ranuras 64 de retencion de elementos de fijacion e impulsan los elementos 66 de fijacion desde las ranuras 64 de retencion al interior de cavidades 30 de deformacion de grapas (figura 4) del conjunto 20 de yunque.
Haciendo referencia a la figura 3, el conjunto 235 de montaje incluye una parte 236 de montaje superior y una parte 238 de montaje inferior. Un elemento 284 de pivote ubicado de manera centrada se extiende desde la parte 236 de montaje superior a traves de una respectiva abertura 246a formada en un primer elemento 246 de acoplamiento. La parte 238 de montaje inferior incluye una perforacion 239 para recibir el elemento 284 de pivote (vease la figura 3F). El elemento 284 de pivote se extiende a traves de la perforacion 239y la abertura 247a de un segundo elemento 247 de acoplamiento. Cada uno de los elementos 246, 247 de acoplamiento incluye una parte 246b, 247b proximal de interbloqueo configurada para recibirse en muescas 290 formadas en el extremo distal de un alojamiento interno que esta formado a partir de mitades 250 y 252 de alojamiento superior e inferior. Los elementos 246, 247 de acoplamiento retienen el conjunto 235 de montaje y las mitades 250 y 252 de alojamiento superior e inferior en una posicion fijada longitudinalmente uno en relacion con las otras mientras que permite el movimiento de pivote del conjunto 235 de montaje en relacion estos.
Haciendo referencia a las figuras 3A3C, cada elemento 246, 247 de acoplamiento incluye un brazo 246c de resorte en voladizo que tiene un extremo 246d distal situado para engancharse con el conjunto 235 de montaje. Mas especificamente, la parte 236 de montaje superior incluye una superficie 236a superior que incluye un rebaje 236b dimensionado para recibir el extremo 246d distal del brazo 246c de resorte de un respectivo elemento 246 de acoplamiento. La parte 238 de montaje inferior incluye una superficie 238a de fondo que tiene un par de superficies 238b elevadas que definen un rebaje 238c que esta dimensionado para recibir el brazo 247c de resorte de un respectivo elemento 247 de acoplamiento. Alternativamente, puede estar formado al menos un rebaje en el extremo proximal del conjunto 17 de herramienta.
Tal como se ilustra en las figuras 3D3G, cuando el extremo distal de los brazos 246c, 247c de resorte de los elementos 246, 247 de acoplamiento estan situados en rebajes 236b y 238c de las partes 236 y 238 de montaje superior e inferior, respectivamente, los brazos 246c, 247c de resorte retienen el conjunto 235 de montaje en una posicion no articulada. Los brazos 246c, 247c de resorte retendran el conjunto 235 de montaje en su posicion no articulada hasta que se aplique una fuerza predeterminada suficiente para desviar los brazos 246c de resorte desdelos rebajes 236b y 238c para efectuar la articulacion del conjunto 235 de montaje y el conjunto 17 de herramienta.Cuando la fuerza predeterminada se aplica al conjunto 235 de montaje yel conjunto 17 de herramienta, los brazos 246c, 247c de resorte se accionaran por resorte o se desviaran hacia fuera desde los rebajes 236b y 238c, tal como se muestra en las figuras 3E y 3G, para permitir el movimiento de pivote del conjunto 235 de montaje (y, asi, el conjunto 17 de herramienta) en relacion con el extremo distal de la parte 200 proximal del cuerpo de la DLU 16.
Tal como se comento anteriormente, los brazos 246c de resorte y los rebajes 236b y 238c mantienen el conjunto 17 de herramienta en su posicion no articulada hasta que se haya aplicado una fuerza predeterminada al conjunto 235 de montaje para desenganchar los brazos 246c, 247c de resorte desde los rebajes 236b y 238c del conjunto 235 de montaje. Esta previsto que los brazos de resorte/rebajes puedan incorporarse en cualquier dispositivo quirurgico articulado incluyendo grapadoras, pinzas (vease la figura 3H), dispositivos de sellado alimentados, por ejemplo, dispositivos de sellado por RF, etc. Ademas, aunque se muestran dos brazos de resorte/rebajes, puede proporcionarse un unico brazo de resorte. Ademas, no es necesario que el conjunto de herramienta articulado forme parte de una DLU pero mas bien puede soportarse directamente en el extremo distal de un instrumento quirurgico. Por ejemplo, el conjunto de montaje puede fijarse de manera separable o inamovible al conjunto de herramienta y fijarse directamente al extremo distal de un instrumento quirurgico.
La mitad 250 de carcasa superior y la mitad 252 de carcasa inferior estan contenidas dentro de una camisa 251 exterior de la parte 200 de cuerpo (figura 3). La parte 200 de cuerpo incluye un recorte 251a dimensionado para recibir un resalte o saliente 250a formado en la mitad 250 de carcasa superior. La situacion delsaliente 250a dentro delrecorte251a impide el movimiento axial y rotacional de las mitades 250 y 252 de carcasa superior e inferior dentro de la camisa 251 exterior de la parte 200 de cuerpo. En una realizacion, el resalte 250a tiene una configuracion sustancialmente rectangular que tiene una mayor dimension axial que la dimension lateral. La mayor dimension axial proporciona un area superficial aumentada para impedir la rotacion de las mitades 250 y 252 de carcasa superior e inferior dentro de la camisa 251. Una parte 250b proximal del resalte 250a esta inclinada. La parte 250b proximal inclinada permite deslizar la camisa 251 por encima del resalte 250a a medida que las mitades 250 y 252 de carcasa superior e inferior se situan dentro de la camisa 251. Esta previsto que el resalte 250a pueda asumir otras configuraciones, por ejemplo, circular, cuadrada, triangular, etc., y consiga todavia su funcion pretendida. Ademas, el resalte 250a puede volver a situarse en cualquier sitio a lo largode la mitad 250 de carcasa superior o, como alternativa, situarse en la mitad 252 de carcasa inferioro parcialmente en cada mitad 250 y 252 de alojamiento.
El extremo proximal o punta 193 de insercion de la mitad 250 de carcasa superior incluye botones 254 de enganche para enganchar de manera 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 de alojamiento definen un canal 400 para recibir de manera deslizante el conjunto 212 de accionamiento axial en el mismo. Una pieza 256 de conexion articulada esta dimensionada para situarse de manera deslizante dentro de una ranura 402 formada entre las mitades 250 y 252 de carcasa superior e inferior. Un par de conjuntos 255 de bloque en H se situan adyacentes al extremo distal de la parte 200 de alojamiento y adyacentes al extremo distal del conjunto 212 de accionamiento axial para impedir la deformacion y el pandeo hacia fuera del conjunto 212 de accionamiento durante la articulacion y el disparo del aparato 10 de grapado quirurgico. Cada conjunto 255 de bloque en H incluye un cuerpo 255a flexible que incluye un extremo proximal fijado de manera firme a la parte 200 de cuerpo y un extremo distal fijado de manera firme al conjunto 235 de montaje (figura 3).
Un elemento 288 de retencion esta soportado en la seccion 270 de enganche del conjunto 212 de accionamiento axial. El elemento 288 de retencion incluye un par de dedos 288a que se situan de manera liberable dentro de las ranuras o rebajes 252a formados en la mitad 252 de carcasa inferior. En funcionamiento, cuando la SULU 16 esta unida a un instrumento quirurgico y el conjunto 212 de accionamiento axial se acciona aplicando una fuerza predeterminada a un elemento 516 de actuacion del instrumento 500 quirurgico (figura 11), el conjunto 212 de accionamiento axial se hace avanzar distalmente para mover el conjunto 212 de accionamiento y el elemento 288 de retencion distalmente. A medida que se hace avanzar distalmente el elemento 288 de retencion, se fuerzan los dedos 288a desde los rebajes 252a para proporcionar una indicacion audible y tactil de que el instrumento quirurgico se haaccionado. El elemento 288 de retencion esta disefado para impedir el accionamiento parcial inadvertido de la DLU 16, tal como durante el transporte, manteniendo el conjunto 212 de accionamiento axial en una posicion fija dentro de la DLU 16 hasta que se haya aplicado una fuerza axial predeterminada al conjunto 212 de accionamiento axial.
El conjunto 212 de accionamiento axial incluye una barra 266 de accionamiento alargada que incluye un cabezal 268 de trabajo distal y una seccion 270 de enganche proximal. En una realizacion, la barra 266 de accionamiento esta construida a partir de multiples hojas apiladas de material. La seccion 270 de enganche incluye un par de dedos 270a y 270b de enganche elasticos que montados enganchan un par de ranuras de retencion correspondientes formadas en el elemento 272 de accionamiento. El elemento 272 de accionamiento incluye un agujero 274 proximal configurado para recibir el extremo distal de una varilla 520 de control (figura 11) de un instrumento quirurgico cuando el extremo proximal de DLU 16 se engancha con la parte 512 de cuerpo de un instrumento 500 quirurgico.
Con referencia tambien a las figuras 510, la DLU 16 incluye ademas un mecanismo de bloqueo que incluye un elemento 300 de bloqueo y un actuador 302 de elemento de bloqueo. El elemento 300 de bloqueo (figura 6) esta soportado de manera rotatoria dentro de una ranura 310 axial o longitudinal (figura 7) formada en una parte proximal de la mitad 250 de carcasa superior de la parte 200 de cuerpo de la DLU 16. El elemento 300 de bloqueo puede moverse desde una primera posicion (figuras 7 y 8), en laqueel elemento 300 de bloqueo mantiene el conjunto 212 de accionamiento en una posicion previa al disparo, hasta una segunda posicion (figuras 9 y 10), en la que el conjunto 212 de accionamiento es libre para moverse axialmente.
Tal como se ilustra en la figura 6, el elemento 300 de bloqueo incluye un cuerpo 312 semicilindrico que esta situado de manera deslizante dentro de la ranura 310 transversal formada en la mitad 250 de carcasa superior de la parte 200 de cuerpo. El cuerpo 312 incluye un elemento 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 recibirse de manera deslizante dentro de una muesca o ranura 270c (figura 3) formada en el conjunto 212 de accionamiento. El enganche del dedo 316 en la muesca 270c del conjunto 212 de accionamiento evita que el conjunto 212 de accionamiento se mueva de manera lineal dentro de la parte 200 de cuerpo y, por tanto, evita el accionamiento de la DLU 16.
Haciendo referencia a las figuras 3, 5 y 7, un actuador 302 de elemento de bloqueo esta situado de manera deslizante dentro de una ranura 320 axial (figura 7) formada en la mitad 250 de carcasa superior de la parte 200 de cuerpo de la DLU 16. El actuador 302 incluye un elemento 322 de tope proximal, una guia 324 de resorte distal, y una ranura 326 de leva central. La ranura 320 axial corta la ranura 310 transversal de modo que el elemento 314 de leva del elemento 300 de bloqueo esta situado de manera deslizante dentro de la ranura 326 de leva del actuador 302 de elemento de bloqueo. Un elemento de desplazamiento o resorte 328 (figura 7) esta situado alrededor de la guia 324 de resorte entre una superficie 330 distal del actuador 302 y una pared 332 (figura 7) que define el extremo distal de la ranura 320 axial. El resorte 328 impulsa el actuador 302 a su posicion retraida dentro de la ranura 320 axial. En su posicion retraida, el elemento 322 de tope esta situado en y se extiende radialmente hacia fuera del extremo proximal de la DLU 16 adyacente a la punta 193 de insercion de la parte 200 proximal de cuerpo y la ranura 326 de leva esta situada para ubicar el elemento 314 de leva de tal manera, que el dedo 316 del elemento 300 de bloqueo este situado dentro de la muesca 270c del conjunto 212 de accionamiento.
Las figuras 1115 ilustran la DLU 16 y el instrumento 500 quirurgico antes de y durante la union de la DLU 16 al instrumento 500 quirurgico. Antes de la union de la DLU 16 al instrumento 500 quirurgico, el resorte 328 impulsa el actuador 302 a su posicion retraida para mover el elemento 300 de bloqueo a su posicion bloqueada tal como se comento anteriormente. Cuando la punta 193 de insercion de la DLU 16 se inserta de manera lineal en el extremo 522 abierto (figura 11) de la parte 512 de cuerpo (figura 13) de un instrumento 500 quirurgico, los botones 254 se mueven de manera lineal a traves de las ranuras (no mostradas) formadas en el extremo 522 abierto de la parte 512 de cuerpo. A medida que los botones 254 pasan a traves de las ranuras, el extremo 322a proximal del elemento 322 de tope, que esta desplazado angularmente de los botones 254, hace tope con una pared 276c que define las ranuras para recibir los botones 254. A medida que la DLU 16 se mueve adicionalmente al interior de la parte 512 de cuerpo, el actuador 302 de elemento de bloqueo se mueve desde su posicion retraida hasta su posicion avanzada en la direccion indicada por la flecha "T" en la figura 14. A medida que el actuador 302 se mueve a su posicion avanzada, el elemento 300 de bloqueo se engrana en la direccion indicada por la flecha "U" en la figura 14 desde su posicion bloqueada (figura 8) enganchada con el conjunto 212 de accionamiento hasta su posicion desbloqueada (figura 10) para mover el dedo 316 desde la muesca 270c. El mecanismo de bloqueo que incluye el elemento 300 de bloqueo y el actuad or 302 de elemento de bloqueo evita el avance o manipulacion accidental o involuntarios del elemento de accionamiento de la DLU 16 tal como durante la carga de la DLU 16 en un instrumento 500 quirurgico.
Cuando la DLU 16 se ha movido de manera lineal en relacion con el instrumento 500 a una posicion en la que una superficie 530 proximal de la parte 200 de cuerpo hace tope con la superficie 276c interna de la parte 512 de cuerpo (figura 15), la DLU 16 puede rotarse en relacion con la parte 512 de cuerpo en una accion de tipo bayoneta para situar los botones 254 dentro de las aberturas 536 de la parte 512 de cuerpo para bloquear la DLU 16 en la parte 512 de cuerpo. Esta previsto que puedan usarse otros tipos de acoplamiento ademas de los acoplamientos de bayoneta para conectar la DLU 16 al instrumento 500, por ejemplo, acoplamientos de ajuste a presion o retencion de resorte, acoplamientos de ajuste por friccion, elementos de interbloqueo, acoplamientos roscados, etc.
En una realizacion de la presente descripcion ilustrada en las figuras 1620, se ilustra un conjunto 600 de bloqueo para su uso con el instrumento 500 quirurgico y una unidad 16 de carga desechable (vease la figura 1, por ejemplo). En las realizaciones ilustradas, el conjunto 600 de bloqueo incluye una carcasa 602, un empujador 604, una varilla 606, un carro 608, al menos un resorte 610, un dedo 612 de leva, una placa 614 de pivote que tiene ranuras 616 y una pieza 618 de conexion. El conjunto 600 de bloqueo generalmente ayuda al conjunto 17 de herramienta (vease la figura 1, por ejemplo) a mantener su posicion durante el disparo del instrumento 500 quirurgico.
Haciendo referencia a las figuras 16 y 17, una parte del conjunto 600 de bloqueo esta contenida al menos parcialmente dentro de una carcasa 602. La figura 16 ilustra el conjunto 600 de bloqueo dispuesto en relacion con la carcasa 602, mientras que la figura 17 ilustra el conjunto 600 de bloqueo aislado de la carcasa 602. En la realizacion ilustrada de la figura 17, el empujador 604 se muestra con la varilla 606 que se extiende distalmente desde el mismo. El carro 608 se extiende distalmente desde la varilla 606 y tiene una relacion deslizante con la misma, permitiendo asi que el carro 608 se mueva axialmente con respecto a la varilla 606. El resorte 610 o par de resortes (no mostrados explicitamente en esta realizacion) desplaza distalmente el carro 608 desde la varilla 606.
Con referencia ahora a las figuras 1820, se ilustran el dedo 612 de leva y la placa 614 de pivote. El dedo 612 de leva se extiende distalmente desde el carro 608 y la placa 614 de pivote puede estar dispuesta en el conjunto 235 de montaje (vease la figura 3), por ejemplo. Esta previsto que la placa 614 de pivote pueda estar dispuesta en o incorporada con una parte del conjunto 17 de herramienta. Una pluralidad de ranuras 616 (se ilustran cinco ranuras 616) esta dispuesta en la placa 614 de pivote y estan dimensionadas para aceptar al menos una parte del dedo 612 de leva en su interior. Con diferentes cantidades de articulacion del conjunto 17 de herramienta (no incluyendo una articulacion sustancial) con respecto a la parte 512 de cuerpo (vease la figura 1, por ejemplo), el dedo 612 de leva esta alineado aproximadamente con una ranura 616 individual de la placa 614 de pivote. Las figuras 18 y 19 ilustran el dedo 612 de leva sustancialmente
alineado con una ranura 616a central (que no pueda verse en la figura 19) y la figura 20 ilustra el dedo 612 de leva sustancialmente alineado con una ranura 616b lateral.
La pieza 618 de conexion, ilustrada en las figuras 17 y 19, esta enganchada de manera mecanica con la placa 614 de pivote y el dedo 612 de leva. (En la figura 18, la pieza de conexion se ha eliminado.) La pieza 618 de conexion se ilustra teniendo una abertura 620 y una ranura 622 (figura 19). La abertura 620 tiene una relacion pivotante con un resalte 624 en la placa 614 de pivote y la ranura 622 esta enganchada de manera deslizante con el dedo 612 de leva. Esta relacion permite la articulacion de la placa 614 de pivote con respecto a la parte 512 de cuerpo y la traslacion longitudinal del carro 608 con respecto a la placa 614 de pivote.
En funcionamiento, con al menos un accionamiento parcial del mango 516 movil (vease la figura 1, por ejemplo), el empujador 604 se fuerza distalmente, por ejemplo, a traves de una varilla 520 de control (vease la figura 11, por ejemplo), provocando asi una traslacion distal del dedo 612 de leva al menos parcialmente al interior de una ranura 616 de la placa 614 de pivote. Esta previsto que el accionamiento del mango 516 movil para aproximar el conjunto 18 de cartucho y un conjunto 20 de yunque (vease la figura 1A, por ejemplo) tambien funcione para trasladar el dedo 612 de leva distalmente. En tal realizacion, cuando el conjunto 17 de herramienta articulado esta en su lugar y se fija en el tejido, no puede lograrse una articulacion adicional (sin liberar el mango 516 movil, por ejemplo). Por tanto, el conjunto 600 de bloqueo ayuda a mantener el conjunto 17 de herramienta articulado en su posicion con respecto a la parte 512 de cuerpo, antes de colocar las grapas en el tejido, por ejemplo.
Tal como se comento anteriormente, el resorte 610 desplaza distalmente el carro 608 desde la varilla 606. Este desplazamiento proporcionado por el resorte 610 ayuda a garantizar que el dedo 612 de leva no se salga accidental o prematuramente de la ranura 616 de la placa 614 de pivote, lo que puede dar como resultado una cantidad significativa de "juego" entremedias. Adicionalmente, el desplazamiento distal proporcionado por el resorte 610 ayuda a eliminar tolerancias y/o huelgos de fabricacion que estan presentes entre el carro 6 08 y la placa 614 de pivote. Tambien se preve que al menos una parte del dedo 612 de leva y/o ranura 616 pueda tener forma de cufa para ayudar a reducir cualquier movimiento involuntario entre las mismas. En tal realizacion, una parte distal del dedo 612 de leva y la ranura 616 seria mas estrecha que una parte proximal correspondiente.
En una realizacion de la presente descripcion ilustrada en las figuras 21 y 22, se ilustra un conjunto 700 de bloqueo para su uso con el instrumento 500 quirurgico yuna unidad 16 de carga desechable (vease la figura 1, por ejemplo). En la realizacion ilustrada, el conjunto 700 de bloqueo incluye un adaptador 702, un empujador 704, un pivote 706, un elemento de desplazamiento (por ejemplo, un par de resortes 708) y una p ieza 710 de conexion. El conjunto 700 de bloqueo ayuda generalmente a mantener el conjunto 17 de herramienta en una posicion predeterminada.
Con referencia a la figura 21, el adaptador 702 del conjunto 700 de bloqueo esta alojado generalmente dentro de la parte 512 de cuerpo (vease la figura 1, por ejemplo) del instrumento 500 quirurgico o dentro de la unidad 16 de carga desechable. En la realizacion ilustrada, el empujador 704 esta ubicado distalmente a un par de resortes 708. El empujador 704 esta desplazado distalmente por medio del par de resortes 708 hacia el pivote 706 del conjunto 17 de herramienta articulado. Una parte distal del empujador 704 incluye una superficie 712 de acoplamiento de empujador (figura 22) que esta conformada y dimensionada para acoplarse con una superficie 714 de acoplamiento de pivote (figura 22) dispuesta adyacente a la parte proximal del pivote 706. La pieza 710 de conexion se ilustra actuando conjuntamente de manera mecanica con una parte del empujador 704 y conectada de manera pivotante a una parte del pivote 706, permitiendo asi que el conjunto 17 de herramienta articulado se mueva entre su primera posicion y su segunda posicion con respecto a la parte 512 de cuerpo. Mas especificamente, la pieza 710 de conexion incluye una abertura 711 que se ajusta sobre una protuberancia 707 del pivote 706, permitiendo asi el movimiento de pivote entre las mismas. Ademas, la pieza 710 de conexion esta enganchada de manera deslizante con una parte del adaptador 702, permitiendo asi el movimiento longitudinal entre las mismas.
Con referencia ahora a la figura 22, la superficie 712 de acoplamiento de empujador es sustancialmente plana a lo largo de una gran parte de su longitud en esta realizacion. De manera correspondiente, la superficie 714 de acoplamiento de pivote tambien es plana a lo largo de una gran parte de su longitud en la realizacion ilustrada. Por tanto, el desplazamiento distal del empujador 704 hacia el pivote 706 (en la direccion de la flecha A) por medio del par de resortes 708, ayuda a mantener el conjunto 17 de herramienta articulado en su primera posicion, no articulada, mientras que la fuerza de desplazamiento ayuda al conjunto 17 de herramienta articulado a resistir el pivotado. Aunque se ilustren dos resortes 708, pueden proporcionarse mas o menos resortes 708.
Para hacer pivotar la herramienta 17 articulada desde su primera posicion, no articulada, debe superarse la fuerza de desplazamiento distal del par de resortes 708. Tal accion pivotante mueve el empujador 704 de manera proximal (en la direccion de la flecha 8) contra el desplazamiento del par de resortes 708. Tambien se preve que la superficie 714 de acoplamiento de empujador incluya elementos de retencion (no mostrados explicitamente en esta realizacion) para ayudar a estabilizar el elemento 17 de mordaza articulado en posiciones articuladas seleccionadas.
Con referencia continuada a la figura 22, el pivote 706 incluye una base 716 sobre el mismo. Tal como se muestra en la figura 22, la base 716 se solapa al menos con una parte del empujador 704 cuando la superficie 712 de acoplamiento de empujador esta en contacto con la superficie 714 de acoplamiento de pivote. La base 716 esta situada y configurada
para ayudar a evitar que el tejido se pellizque entre el empujador 704 y el pivote 706 cuando el conjunto 17 de herramienta articulado se hace rotar y/o se articula.
En una realizacion de la presente descripcion ilustrada en las figuras 2325, se ilustra una barra 750 de accionamiento de multiples capas que tiene una pluralidad de capas 750a 750e y puede estar incluida en una unidad 16 de carga desechable (vease la figura 1, por ejemplo). Tambien se ilustra un aparato 760 de cierre, tal como una barra en I. El aparato 760 de cierre incluye una parte 762 horizontal que puede hacerse avanzar al interior de la superficie 42 de leva (u otra superficie de contacto) para aproximar el conjunto de herramienta conjunto 17 de herramienta, tal como se describio en detalle anteriormente con referencia a la figura 2.
Con referencia a la figura 24, se ilustra la barra 750 de accionamiento de multiples capas que tiene cinco capas 750a 750e. Se preve y esta dentro del alcance de la presente descripcion que puedan usarse menos o mas capas para formar la barra 750 de accionamiento de multiples capas. Tambien se preve que la barra 750 de accionamiento de multiples capas pueda sustituir a la barra 266 de accionamiento en otras realizaciones de esta descripcion. El uso de la barra 750 de accionamiento de multiples capas puede proporcionar una resistencia y flexibilidad aumentadas durante el uso, especificamente, por ejemplo, mientras que el conjunto 17 de herramienta este en una posicion articulada.
Una pluralidad de recortes 770 se ilustra en las figuras 2325 que se extienden a traves de cada capa de la barra 750 de accionamiento de multiples capas. Aunque las figuras muestran entre cinco y diez recortes por capa de la barra 750 de accionamiento de multiples capas, el numero exacto de recortes 770 puede ser menor de cinco, entre cinco y diez, o mayor de diez. Adicionalmente, los recortes 770 de las capas adyacentes de la barra 750 de accionamiento pueden o no alinearse entre si. El uso de recortes 770 reduce las dimensiones de seccion transversal de la barra 750 de accionamiento y permite el ajuste de lafuerza de curvatura. Aunque se ilustran recortes 770 rectangulares, tambien se contempla el uso de recortes 770 que tengan otras formas regulares o no regulares.
La union de cada capa 750a 750e de l a barra 750 de accionamiento de multiples capas y la union al aparato 760 de cierre se ilustran en la figura 25. En la realizacion ilustrada, una capa exterior (750a o 750e de la figura 24) esta fijada al aparato 760 de cierre en dos ubicaciones (estando indicada cada ubicacion mediante el numero de referencia 780 en la figura 25), por medio de un par de soldaduras por puntos, por ejemplo. Tambien se preve que cada capa 750a, 750e exterior incluya una abertura 776 que se ajuste sobre un resalte 778 que sobresale del aparato 760 de cierre. Cada capa 750a, 750e exterior tambien esta fijada a una capa adyacente (por ejemplo, 750b o 750d) en dos ubicaciones (estando indicada cada ubicacion mediante el numero de referencia 781 en la figura 25), posiblemente por medio de un par de soldaduras por puntos. Ademas, cada capa interior (por ejemplo, 750b, 750c y 750d) esta unida a una capa interior adyacente (por ejemplo, 750b esta unida a 750c; 750c esta unida a 750b y 750d; y 750d esta unida a 750c) en dos ubicaciones, por medio de soldaduras por puntos, por ejemplo. Aunque se da a conocer la soldadura por puntos como metodo de union, se preven otros metodos para unir cada capa entre si y las capas exteriores al aparato de cierre y estan dentro del alcance de la presente descripcion. Las realizaciones ilustradas muestran puntos 780 de union de las capas interiores adyacentes al aparato 760 de cierre, aunque se preve y esta dentro del alcance de la presente descripcion que los puntos780 de union esten dispuestos en otras ubicacionesen la barra 750 de accionamiento. Adicionalmente, se preve que al menos una capa de la barra 750 de accionamiento este hecha de un metal, tal como acero inoxidable. Las partes de la barra 750 de accionamientoy/o el aparato 760 de cierre tambien pueden estar hechas de o al menos parcialmente recubiertas con un material de plastico, tal como se describe a continuacion. Ademas, el aparato 790 de cierre puede incluir una superficie 766 de corte (figura 23) en el mismo para cortar tejido.
En una realizacion de la presente descripcion ilustrada en las figuras 26 y 27, se muestran un aparato800 de cierrey una parte de barra 802 de accionamiento. El aparato de cierre y/o una superficie de contacto (por ejemplo, la superficie 42 de leva) del conjunto 17 de herramienta (vease la figura 2, por ejemplo) pueden incluir una superficie de plastico o recubrimiento de plastico. En esta realizacion, el aparato 800 de cierre se ilustra teniendo un par de sombreretes 804 que cubren al menos parcialmente las partes 806 horizontales del aparato 800 de cierre. Los sombreretes 804 pueden estar hechos de plastico en esta realizacion. Tales superficies de plastico dispuestas en el aparato 800 de cierre y/o la superficie de contacto del conjunto 17 de herramienta reducen generalmente la cantidad de friccion entre los mismos con respecto a dos superficies metalicas. Es decir, una interaccion de plastico con metal o plastico con plastico puede crear menos friccion que la interaccion entre un par de superficies metalicas. Esta cantidad reducida de friccion puede corresponder a una fuerza de disparo reducida.
Esta previsto que una parte del aparato 800 de cierre, tal como un par de sombreretes 804, este hecha de plastico, sobremoldeada con plastico o incluya un recubrimiento de plastico. Adicionalmente, una superficie de contacto del conjunto 17 de herramienta, o al menos una parte de la misma, tambien puede estar hecha de plastico, estar sobremoldeada con plastico o incluir un recubrimiento de plastico.
En una realizacion de la descripcion, el aparato 800 de cierre puede incluir una seccion transversal en forma de I, tal como se ilustra en las figuras 26 y 27. Adicionalmente, el aparato 800 de cierre y la barra 802 de accionamiento pueden formar parte de una unidad 16 de carga desechable y/o parte de un instrumento 500 quirurgico que puede articularse. Ademas, la barra 802 de accionamiento puede incluir una unica capa o una pluralidad de capas (tal como se muestra en la figura 26) y al menos una parte de la barra 802 de accionamiento puede estar hecha de plastico. Todavia adicionalmente, el aparato 800 de cierre puede incluir una superficie 808 de corte (figura 27) en el mismo para cortar tejido.
Con referencia continuada a las figuras 26 y 27, el sombrerete 804 de plastico puede incluir una seccion 810 reforzada que puede aumentar la resistencia del aparato 800 de cierre o puede proporcionar una conexion mas fuerte entre e l sombrerete 804 yla parte 806 horizontal del aparato 800 de cierre. Tambien se preve que el sombrerete 804 pueda unirse de manera retirable al aparato 800 de cierre. En tal realizacion, el sombrerete 804 puede retirarse y reemplazarse si se produce cualquier desgaste o dafo sustancial.
Las figuras 27a27d ilustran el elemento de cierre de la presente invencion mostrado en general como 800'. Tal como se comento anteriormente con respecto al elemento 800 de cierre, el elemento 800' de cierre puede incluir una seccion transversal en forma de I que incluye una parte 802' de reborde superior, una parte 804' de reborde inferior y una parte 806' de barra vertical que se extiende entre la parte 802' de reborde superior y una parte 804' de reborde inferior. El elemento 800' de cierre puede estar formado de metal, por ejemplo, acero inoxidable, etc. Cada una de la parte 802' de reborde superior y la parte 804' de reborde inferior incluye una superficie 807' externa y una superficie 808' interna. Cada superficie 808' interna incluye un recorte o rebaje 810' (figura 27d) que esta dimensionado para recibir una pieza 812' de insercion formada de un material que tiene un coeficiente de friccion bajo. En una realizacion, la pieza 812' de insercion esta formada de plastico aunque se preve que tambien puedan usarse otros materiales que tengan un coeficiente de friccion bajo y las caracteristicas de resistencia requeridas para formar la pieza 812' de insercion. Tal como se ilustra, la pieza 812' de insercion puede extenderse ligeramente por debajo de la superficie 808' interna de la parte 802' de reborde superior y ligeramente por encima de la superficie 808' interna de la parte 804' de reborde inferior. Aunque las piezas 812' de insercion estan ilustradas de modo que se extienden a lo largo de solo una parte de la longitud de las superficies 808' internas de las partes 802' y 804' de reborde superior e inferior, se preve que las piezas 812' de insercion puedan extenderse por toda o sustancialmente toda la longitud de las superficies 808' internas.
La parte 806' de barra vertical incluye un recorte 814' dimensionado para recibir una barra de accionamiento (vease, por ejemplo, la barra 802 de accionamiento en la figura 27) y una hoja 816' de cuchilla. La hoja 816' de cuchilla puede fijarse a la parte 806' de barra vertical, tal como mediante soldadura, o mecanizarse directamente en su interior. De manera similar, la barra de accionamiento puede soldarse al elemento 800' de cierre, formarse de manera solidaria al mismo, o fijarse al elemento 800' de cierre usando otras tecnicas de fijacion conocidas.
Haciendo referencia a las figuras 27a y 27c, el borde 819' distal de la parte 804' de reborde inferior incluye un chaflan o borde 820' redondeado. El borde 819' distal es el borde que engancha en primer lugar el conjunto 17 de herramienta. En una realizacion, el borde 820' redondeado esta separado de la pieza 812' de insercion y esta situado para efectuar la aproximacion de la mordaza pivotante del dispositivo de grapado. Vease la figura 1.
Haciendo referencia a las figuras 27c y 27d, en una realizacion la pieza 812' de insercion (figura 27a) se une a la parte 802' de reborde superior y la parte 804' de reborde inferior formando la pieza 812' de insercion en su lugar. Esto puede realizarse usando un proceso de moldeo por inyeccion. En una realizacion del proceso, se realiza un orificio 822' en y a traves delas partes 802' y 804' dereborde superior y/o inferior para comunicarse con los rebajes 810' de la parte 802' de reborde superior y la parte 804' de reborde inferior. Cada orificio 822' se comunica desde la superficie 806' externa con ambos rebajes 810' en la superficie 808' interna de las partes de reborde superior o inferior. Alternativamente, pueden realizarse dos orificios a traves de cada una de las partes 802' y 804' de reborde superior e inferior, comunicandose cada orificio con un rebaje en un lado de la parte 806' de barra vertical. A continuacion, el elemento 800' de cierre se situa dentro de un molde y se inyecta material de molde a traves del orificio 822' en los rebajes 810' para formar las piezas 812' de insercion. El molde puede estar configurado para proporcionar cualquier configuracion deseada de pieza de insercion. Despues de la etapa de moldeo, la pieza de insercion o las piezas 812' de insercion pueden mecanizarse o conformarse adicionalmente y el elemento 800' de cierre puede mecanizarse o limpiarse de una manera conocida para preparar el elemento 800' de cierre para su uso en un dispositivo quirurgico.
En una realizacion de la presente descripcion ilustrada en las figuras 28 y 29, se ilustra un conjunto 850 de herramienta. El conjunto 850 de herramienta de esta realizacion incluye un canal 852, un primer elemento 860 de union, un segundo elemento 870 de union, un conjunto 880 deyunque, una primera varilla 890 de union yuna segunda varilla 892 de union. Las varillas 890, 892 de union primera y segunda proporcionan una conexion resistente que facilita que los elementos del conjunto 850 de herramienta permanezcan juntos.
El canal 852 incluye una abertura 854 (se ilustran dos aberturas) adyacente a su extremo proximal y el primer elemento 860 de union incluye un resalte 862 (se ilustran dos resaltes) que se extiende desde el mismo. El canal 852 puede conectarse al primer elemento de union situando la(s) abertura(s) 854 sobre el(los) resalte(es) 862, proporcionando asi una conexion pivotante entre los mismos. A unque no se ilustra explicitamente en la presente realizacion, el canal 852 puede alojar una pluralidad de elementos de fijacion quirurgicos o un cartucho de grapas.
El conjunto 880 de yunque incluye una cubierta 882 de yunque y un yunque 886. El yunque 886 esta configurado para el enganche mecanico con la cubierta 882 de yunque, por ejemplo, a traves de una conexion de ajuste a presion. Una abertura 884 se extiende al menos parcialmente a traves de una parte de la cubierta 882 de yunque. La abertura 884 esta configurada para ajustarse sobre una protuberancia 872 dispuesta en el segundo elemento 870 de union, proporcionando asi una conexion entre el conjunto 880 de yunque y el segundo elemento 870 de union. Adicionalmente, la cubierta 882 de yunque incluye al menos una abertura 888 que se extiende al menos parcialmente a traves de la misma en una realizacion de la descripcion. La abertura 888 esta configurada para ajustarsesobre el resalte 862 del primer
elemento 860 de union. En tal realizacion, el conjunto 880 de yunque puede hacerse pivotar con respecto al primer elemento 860 de union y al segundo elemento 870 de union.
El primer elemento 860 de union incluye una primera abertura 864 y una segunda abertura 866 que se extienden a traves del mismo. El segundo elemento 870 de union tambien incluye una primera abertura 874 y una segunda abertura 876 que se extienden a traves del mismo (figura 29). Ademas, el primer elemento 860 de union y el segundo elemento 870 de unionestan enganchados de manera mecanica, de modo que las primeras aberturas 864, 874 se alinean sustancialmente y las segundas aberturas 866, 876 se alinean sustancialmente.
Para fijar el primer elemento 860 de union con el segundo elemento 870 de union (y por tanto el canal 852 y el conjunto 880 de yunque), la primera varilla 890 de union, o una parte de la misma, se inserta a traves de las primeras aberturas 864 y 874. Para fijar adicionalmente los elementos del conjunto 850 de herramienta, la segunda varilla 892 de union, o una parte de la misma, se inserta a traves de las segundas aberturas 866 y 876. Esta previsto que la primera varilla 890 de union y/o la segunda varilla 892 de union sean remaches, tal como remaches de dos partes que puedan apretarse.
En una realizacion de la descripcion, el conjunto 850 de herramienta forma parte de una unidad de carga desechable, que puede articularse. La articulacion del conjunto 850 de herramienta puede facilitarse uniendo de manera pivotante el conjunto 850 de herramienta a una parte de cuerpo de un instrumento quirurgico a traves de una protuberancia 874 que se extiende desde el segundo elemento 870 de union y una pieza de conexion (tal como la pieza 710 de conexion en la figura 21). Adicionalmente, se contempla un metodo para ensamblar el conjunto 850 de herramienta, tal como se describio anteriormente, mediante la presente descripcion.
Se entendera que pueden realizarse diversas modificaciones de las realizaciones dadas a conocer en el presente documento. Por ejemplo, el conjunto de bloqueo descrito anteriormente puede estar incorporado en una diversidad de instrumentos quirurgicos que incluyan DLU y no esta limitado al uso de grapadoras lineales. Ademas, la DLU puede estar configurada para recibir una punta de insercion del instrumento quirurgico a diferencia de lo descrito. Por tanto, la descripcion anterior no debe interpretarse como limitativa, sino meramente como ejemplificaciones de las diversas realizaciones.

Claims (9)

  1. REIVINDICACIONES
    1. Instrumento (500) quirurgico que comprende:
    una parte (510) de mango;
    una parte (512) de cuerpo que se extiende distalmente desde la parte (510) de mango; y
    un conjunto (17) de herramienta soportado en un extremo distal de la parte (512) de cuerpo, incluyendo el conjunto (17) de herramienta un conjunto (18) de cartucho, y un conjunto (20) de yunque soportado adyacente al conjunto (18) de cartucho, pudiendo moverse el conjunto (20) de yunque en relacion con el conjunto (18) de cartucho desde una posicion abierta hasta una posicion cerrada, incluyendo ademas el conjunto (17) de herramienta un elemento (800') de cierre que tiene una parte (802') de reborde superior y una parte (804') de reborde inferior interconectadas mediante una parte (806') de barra vertical, pudiendo moverse el elemento (800') de cierre en relacion con el conjunto (17) de herramienta para mantener un hueco de tejido deseado adyacente al elemento (800') de cierre,
    caracterizado porque al menos una de la parte (802') de reborde superior y la parte (804') de reborde inferior incluye una superficie (807') externa, una superficie (808') interna y un orificio (822'), extendiendose el orificio entre la superficie (807') externa y la superficie (808') interna, en el que un material (812') que tiene un coeficiente de friccion bajo esta situado dentro del orificio (822') y en al menos una parte de la superficie (808') interna de al menos una de l a parte (802') de reborde superior y la parte (804') de reborde inferior.
  2. 2.
    Instrumento (500) quirurgico segun la reivindicacion 1, en el que tanto la parte (802') de reborde superior como la parte (804') de reborde inferior incluyen una superficie (807') externa, una superficie (808') interna y un orificio (822'), extendiendose el orificio entre la superficie (807') externa y la superficie (808') interna.
  3. 3.
    Instrumento (500) quirurgico segun la reivindicacion 1 o 2, en el que la superficie (808') interna de la al menos una de la parte (802') de reborde superior y la parte (804') de reborde inferior define un rebaje (810') que se comunica con el orificio (822'), estando situado el material que tiene un coeficiente de friccion bajo dentro del rebaje (810').
  4. 4.
    Instrumento (500) quirurgico segun la reivindicacion 3, en el que el material (812') que tiene un coeficiente de friccion bajo es un material moldeable por inyeccion.
  5. 5.
    Instrumento (500) quirurgico segun la reivindicacion 4, en el que el material (812') es un plastico.
  6. 6.
    Instrumento (500) quirurgico segun lareivindicacion 3, 4 o 5, en el que el material (812') que tiene un coeficiente de friccion bajo se extiende a lo largo de sustancialmente toda la longitud de la superficie (808') interna de la al menos una de la parte (802') de reborde superior y la parte (804') de reborde inferior.
  7. 7.
    Instrumento (500) quirurgico segun una cualquiera de las reivindicaciones anteriores, en el que el elemento (800') de cierre esta fijado a un extremo distal de un conjunto (212) de accionamiento flexible.
  8. 8.
    Instrumento (500) quirurgico segun la reivindicacion 7, en el que la parte (806') de barra vertical del elemento (800') de cierre incluye al menos un recorte (814') dimensionado para recibir el extremo distal del conjunto (212) de accionamiento flexible.
  9. 9.
    Instrumento (500) quirurgico segun la reivindicacion 8, en el que el al menos un recorte (814') incluye un primer recorte en un lado de la parte (806') de barra vertical y un segundo recorte en un lado opuesto de la parte (806') de barra vertical.
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US20080308605A1 (en) 2008-12-18
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US20120273550A1 (en) 2012-11-01
US7866525B2 (en) 2011-01-11
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US11134939B2 (en) 2021-10-05
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