BRPI0604524B1 - Mecanismos de bloqueio e instrumentos cirúrgicos incluindo os mesmos - Google Patents
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Abstract
mecanismos de bloqueio e instrumentos cirúrgicos incluindo os mesmos. a presente invenção refere-se a um instrumento cirúrgico. o instrumento cirúrgico inclui uma porção de cabo, um canal, uma bigorna, um cartucho de grampos, um membro de cunha, um dispositivo de disparo recíproco, e um braço de bloqueio. a porção de cabo é operavelmente configurada para produzir um movimento de disparo e é acoplada à porção de canal. o cartucho de grampos é engatado pelo canal e inclui uma pluralidade de acionadores de grampos para acionar os grampos na direção da bigorna, que é pivotavelmente conectada ao canal. o membro de cunha é proximal e longitudinalmente alinhado com os acionadores de grampo, e o dispositivo de disparo recíproco é responsivo ao movimento de disparo para progressivamente acionar o membro de cunha de uma posição não-disparada para uma posição disparada. o braço de bloqueio é pivotavelmente conectado ao canal e operavelmente configurado para pivotar entre uma posição travada e uma posição destravada com relação ao dispositivo de disparo com base em uma posição do membro de cunha.
Description
(54) Título: MECANISMOS DE BLOQUEIO E INSTRUMENTOS CIRÚRGICOS INCLUINDO OS MESMOS (73) Titular: JOHNSON & JOHNSON, Sociedade Norte Americana. Endereço: One Johnson & Johnson Plaza, New Brunswick, N.J. 08933-7001, ESTADOS UNIDOS DA AMÉRICA(US), Norte Americana (72) Inventor: MARK S. ORTIZ; CHAD PAUL BOUDREAUX
Prazo de Validade: 10 (dez) anos contados a partir de 02/05/2018, observadas as condições legais
Expedida em: 02/05/2018
Assinado digitalmente por:
Júlio César Castelo Branco Reis Moreira
Diretor de Patente
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Relatório Descritivo da Patente de Invenção para MECANISMOS DE BLOQUEIO E INSTRUMENTOS CIRÚRGICOS INCLUINDO OS MESMOS.
CAMPO DA INVENÇÃO [001] A presente invenção refere-se, de modo geral, e em várias concretizações a instrumentos cirúrgicos de grampeamento e corte estruturados e configurados para a aplicação de linhas de grampos provenientes de um cartucho de grampos reutilizável no tecido enquanto corta o tecido entre as linhas de grampos aplicadas. Mais particularmente, a invenção descrita refere-se a mecanismos de bloqueio para uso em instrumentos cirúrgicos de grampeamento e corte articulados que impedirão o corte do tecido, quando o cartucho de grampos estiver gasto ou, de outro modo, não estiver presente em uma posição não-disparada.
ANTECEDENTES DA INVENÇÃO [002] Instrumentos cirúrgicos de grampeamento e corte foram usados na técnica anterior para simultaneamente fazer uma incisão longitudinal no tecido e aplicar linhas de grampos nos lados opostos da incisão. Tais instrumentos incluem comumente um par de membros de garra cooperantes que, caso o instrumento se destine a aplicações endoscópicas ou laparoscópicas, é capaz de passar através de uma passagem de cânula. Um dos membros de garra recebe um cartucho de grampos apresentando pelo menos duas fileiras lateralmente espaçadas de grampos. O outro membro de garra define uma bigorna apresentando receptáculos de formação de grampos alinhados com as fileiras de grampos no cartucho. O instrumento inclui uma pluralidade de cunhas recíprocas que, quando acionada distalmente, passará através de aberturas no cartucho de grampos e engatará acionadores que sustentam os grampos para efetuar o disparo dos grampos na direção da bigorna.
Petição 870170075544, de 05/10/2017, pág. 5/40
2/30 [003] Um exemplo de um grampeador cirúrgico adequado para aplicações endoscópicas é descrito na Patente norte-americana N° 5.465.895, que vantajosamente confere ações de fechamento e disparo distintas. Assim, um clínico poderá fechar os membros de garra sobre o tecido para posicionar o tecido antes do disparo. Uma vez que o clínico tenha determinado que os membros de garra estão adequadamente prendendo o tecido, o clínico poderá então disparar o grampeador cirúrgico. O disparo faz com que todos os grampos sejam dispostos no tecido e uma lâmina seja avançada para cortar o tecido. O corte e o grampeamento simultâneos impedem complicações que poderão surgir, quando da execução de tais ações sequencialmente com diferentes ferramentas cirúrgicas que respectivamente apenas cortam ou grampeiam.
[004] Geralmente, é vantajoso construir um formador de extremidade para o grampeador cirúrgico que seja reutilizável. Por exemplo, um paciente poderá necessitar de uma série de operações de corte e grampeamento. A substituição de todo o formador de extremidade para cada operação tende a ser economicamente ineficiente. Isto, de fato, acontecerá, se o formador de extremidade for construído apropriado para resistência e confiabilidade durante operações repetidas. Para essa finalidade, os cartuchos de grampos são ajustados no formador de extremidade antes de cada operação do grampeador cirúrgico. Assim, uma quantidade muito menor de grampos cirúrgicos é descartada depois de cada uso.
[005] Enquanto o cartucho de grampos apresenta inúmeras vantagens, será desejável impedir o disparo imprudente do instrumento, quando um cartucho de grampos não-disparado não estiver presente. De outra maneira, o corte do tecido poderá ocorrer sem os grampos para minimizar o sangramento. É particularmente desejável que o impedimento deste disparo imprudente seja conseguido de maneira conPetição 870170075544, de 05/10/2017, pág. 6/40
3/30 fiável, isto é, não submetido a um mau funcionamento interveniente. Além disso, para facilidade de fabricação e montagem, é adicionalmente desejável que as características de bloqueio sejam efetuadas com um número mínimo de componentes.
[006] Mecanismos de bloqueio com base no movimento vertical da lâmina são conhecidos e particularmente bem adequados para desenhos de endocortador não-articulado, nos quais o formador de extremidade é localizado na extremidade de um eixo geralmente rígido. O eixo permite a inserção até uma profundidade desejada e rotação em torno do eixo longitudinal do eixo, permitindo assim que o formador de extremidade seja posicionado em um ponto. A Patente norteamericana N° 5.878.938, para Bittner e outros, descreve um mecanismo de travamento, ou bloqueio, que usa uma mola lamelar para automaticamente levantar uma lâmina do cartucho depois de uma operação de disparo, travando assim o instrumento, de modo que as operações de disparo subsequentes sejam impedidas. A Patente norteamericana N° 5.673.842, também para Bittner e outros, ensina um mecanismo de travamento que usa um membro alongado que automaticamente gira a partir de uma primeira posição para uma segunda posição, à medida que o instrumento é disparado. Com o braço de travamento na segunda posição, a lâmina fica livre para transladar ascendentemente e travar o instrumento.
[007] Tais mecanismos de bloqueio podem ser menos adequados para uso em desenhos de instrumento cirúrgico de grampeamento e corte articulado, nos quais o formador de extremidade é localizado na extremidade de um eixo que incorpora um mecanismo de articulação. A Patente norte-americana N° 6.786.382, para Hoffman, descreve um instrumento cirúrgico de grampeamento e corte que incorpora um mecanismo de articulação para acoplar o eixo ao formador de extremidade. O disparo dos grampos e o corte do tecido são efetuados por
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4/30 um mecanismo de disparo flexível que se estende através do mecanismo de articulação que é capaz de transferir grandes cargas através do mesmo tanto no estado flexionado como no estado não-flexionado. Apesar da maior flexibilidade clínica geralmente provida pelos desenhos de instrumento articulado, a geometria do mecanismo de disparo e/ou forças físicas presentes, enquanto o mecanismo de disparo está em um estado flexionado, podem ser suficientemente restritas a seu movimento vertical, de tal modo que os mecanismos de bloqueio acima descritos não possam ser efetivamente empregados.
[008] Consequentemente, existe uma necessidade significativa de mecanismos de bloqueio aperfeiçoados para uso em instrumentos cirúrgicos de grampeamento e corte articulados que impeçam o disparo imprudente (isto é, o corte e o grampeamento), quando um cartucho de grampos estiver gasto ou, de outro modo, não presente em uma posição não-disparada.
BREVE SUMÁRIO DA INVENÇÃO [009] Este pedido descreve um instrumento cirúrgico que compreende uma porção de cabo, um canal, uma bigorna, e um cartucho de grampos, um membro de cunha, um dispositivo de disparo recíproco, e um braço de bloqueio. A porção de cabo é operavelmente configurada para produzir um movimento de disparo e é acoplada à porção de canal. O cartucho de grampos é engatado pelo canal e inclui uma pluralidade de acionadores de grampos e grampos. Os acionadores de grampos são configurados para o acionamento dos grampos na direção da bigorna, que é pivotavelmente conectada ao canal. O membro de cunha é proximal e longitudinalmente alinhado com os acionadores de grampos, e o dispositivo de disparo recíproco é responsivo ao movimento de disparo para progressivamente acionar o membro de cunha de uma posição não-disparada para uma posição disparada. O braço de bloqueio é pi votavel mente conectado ao canal e operavelPetição 870170075544, de 05/10/2017, pág. 8/40
5/30 mente configurado para pivotar entre uma posição travada e uma posição destravada com relação ao dispositivo de disparo com base em uma posição do membro de cunha.
[0010] Este pedido adicionalmente descreve um instrumento cirúrgico que compreende uma porção de cabo, um canal, uma bigorna, e um cartucho de grampos, um membro de cunha, um dispositivo de disparo recíproco, e pelo menos uma montagem de bloqueio. A porção de cabo é operavelmente configurada para produzir um movimento de disparo e é acoplada à porção de canal. O cartucho de grampos é engatado pelo canal e inclui uma pluralidade de acionadores de grampo e grampos. Os acionadores de grampos são configurados para o acionamento dos grampos na direção da bigorna, que é pivotavelmente conectada ao canal. O membro de cunha é proximal e longitudinalmente alinhado com os acionadores de grampos, e o dispositivo de disparo recíproco é responsivo ao movimento de disparo para progressivamente acionar o membro de cunha de uma posição nãodisparada para uma posição disparada. Cada montagem de bloqueio inclui um cartucho de bloqueio movelmente disposto dentro de um rebaixo correspondente definido pelo canal. O cartucho de bloqueio é configurado para se mover entre uma posição travada e uma posição destravada com relação ao dispositivo de disparo com base em uma posição do membro de cunha.
[0011] Este pedido adicionalmente descreve um instrumento cirúrgico que compreende uma porção de cabo, um canal, uma bigorna, e um cartucho de grampos, um membro de cunha, e um dispositivo de disparo recíproco. A porção de cabo é operavelmente configurada para produzir um movimento de disparo e é acoplada à porção de canal. O cartucho de grampos é engatado pelo canal e inclui uma pluralidade de acionadores de grampos e grampos. Os acionadores de grampos são configurados para o acionamento dos grampos na direção da biPetição 870170075544, de 05/10/2017, pág. 9/40
6/30 gorna, que é pivotavelmente conectada ao canal. O membro de cunha é proximal e longitudinalmente alinhado com os acionadores de grampos, e o dispositivo de disparo recíproco é responsivo ao movimento de disparo para progressivamente acionar o membro de cunha de uma posição não-disparada para uma posição disparada. O dispositivo de disparo inclui uma porção distal, uma porção proximal, e um meio de pivotamento que conecta as porções proximal e distal. A porção distal é configurada para pivotar entre uma posição travada e uma posição destravada com relação ao canal com base em uma posição do membro de cunha.
[0012] Este pedido adicionalmente descreve um formador de extremidade para uso com um instrumento cirúrgico, o formador de extremidade compreendendo um canal, um dispositivo de disparo recíproco, e um braço de bloqueio. O canal é configurado para receber um cartucho de grampos, e o dispositivo de disparo é responsivo a um movimento de disparo produzir pelo instrumento cirúrgico para progressivamente acionar um membro de cunha do cartucho de grampos de uma posição não-disparada para uma posição disparada. O braço de bloqueio é pivotavelmente conectado ao canal e operavelmente configurado para pivotar entre uma posição travada e uma posição destravada com relação ao dispositivo de disparo com base em uma posição do membro de cunha.
[0013] Este pedido adicionalmente descreve um formador de extremidade para uso com um instrumento cirúrgico, o formador de extremidade compreendendo um canal e um dispositivo de disparo recíproco. O canal é configurado para receber um cartucho de grampos, e o dispositivo de disparo é responsivo a um movimento de disparo produzido pelo instrumento cirúrgico para progressivamente acionar um membro de cunha do cartucho de grampos de uma posição nãodisparada para uma posição disparada. O dispositivo de disparo comPetição 870170075544, de 05/10/2017, pág. 10/40
7/30 preende uma porção distal, uma porção proximal, e um meio de pivotamento que conecta as porções proximal e distal. A porção distal é configurada para pivotar entre uma posição travada e uma posição destravada com relação ao canal com base em uma posição do membro de cunha.
BREVE DESCRIÇÃO DAS FIGURAS [0014] A figura 1 é uma vista em perspectiva superior frontal de um instrumento cirúrgico de grampeamento e corte mostrado com um formador de extremidade aberto, ou montagem de aplicação de grampos, e com o cartucho de grampos removido, de acordo com várias concretizações.
[0015] A figura 2 é uma vista em perspectiva superior frontal do instrumento cirúrgico de grampeamento e corte da figura 1 com um mecanismo de articulação acionado por um controle de acionamento fluídico, de acordo com várias concretizações.
[0016] A figura 3 é uma vista desmontada em perspectiva de um mecanismo de eixo alongado e de articulação do instrumento cirúrgico de grampeamento e corte da figura 1, de acordo com várias concretizações.
[0017] A figura 4 é uma vista desmontada em perspectiva das porções distais de uma porção de implemento do instrumento cirúrgico de grampeamento e corte da figura 1, incluindo o mecanismo de articulação e montagem de aplicação de grampos, de acordo com várias concretizações.
[0018] A figura 5 é uma vista em perspectiva superior frontal do formador de extremidade na extremidade distal do instrumento cirúrgico de grampeamento e corte das figuras 3-4, com a bigorna removida e apenas o trenó de cunha do cartucho de grampos mostrado, de acordo com várias concretizações.
[0019] As figuras 6-8 são vistas laterais em seção transversal do
Petição 870170075544, de 05/10/2017, pág. 11/40
8/30 formador de extremidade das figuras 3-4 sequencialmente mostrado em um estado do cartucho de grampos carregado e não-disparado na figura 6, um estado do cartucho de grampos sendo disparado na figura 7, e um estado do cartucho de grampos gasto com barra de disparo retraída na figura 8, de acordo com várias concretizações.
[0020] A figura 9 é uma vista desmontada em perspectiva das porções distais de uma porção de implemento do instrumento cirúrgico de grampeamento e corte da figura 1, incluindo o mecanismo de articulação e montagem de aplicação de grampos, de acordo com várias concretizações.
[0021] A figura 10 é uma vista em perspectiva superior frontal do formador de extremidade da figura 9 na extremidade distai do instrumento cirúrgico de grampeamento e corte, com o cartucho de grampos e a bigorna removidos, de acordo com várias concretizações.
[0022] As figuras 11-13 são vistas frontais em seção transversal do formador de extremidade da figura 9 sequencialmente mostrado em um estado do cartucho de grampos carregado e não-disparado na figura 11, um estado do cartucho de grampos sendo disparado na figura 12, e um estado do cartucho de grampos gasto com a barra de disparo retraída na figura 13, de acordo com várias concretizações.
[0023] A figura 14 é uma vista desmontada em perspectiva das porções distais de uma porção de implemento do instrumento cirúrgico de grampeamento e corte da figura 1, incluindo o mecanismo de articulação e montagem de aplicação de grampos, de acordo com várias concretizações.
[0024] A figura 15 é uma vista em perspectiva superior frontal do formador de extremidade da figura 14 na extremidade distai do instrumento cirúrgico de grampeamento e corte, com a bigorna removida e apenas o trenó de cunha do cartucho de grampos mostrado, de acordo com várias concretizações.
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9/30 [0025] E as figuras 16-18 são vistas frontais em seção transversal do formador de extremidade da figura 14 sequencialmente mostrado em um estado do cartucho de grampos carregado e não-disparado na figura 16, um estado do cartucho de grampos sendo disparado na figura 17, e um estado do cartucho de grampos gasto sendo novamente disparado na figura 18, de acordo com várias concretizações. DESCRIÇÃO DETALHADA DA INVENÇÃO [0026] Qualquer patente, publicação, ou outro material de descrição, inteiro ou em partes, a ser aqui incorporado para referência, é apenas incorporado na medida em que o material incorporado não seja incompatível com as definições e declarações existentes, ou com outro material de descrição apresentado nesta descrição. Assim, e na medida do necessário, a descrição, conforme explicitamente explicada aqui, relega qualquer material conflitante incorporado aqui para referência. Qualquer material, ou porção do mesmo, a ser aqui incorporado para referência, mas que entra em conflito com as definições e declarações existentes, ou com outro material de descrição apresentado aqui, será apenas incorporado na medida em que não surja nenhum conflito entre esse material incorporado e o material de descrição existente.
[0027] De volta aos desenhos, onde numerais semelhantes indicam componentes semelhantes por todas as diversas vistas, a figura 1 representa um instrumento cirúrgico, que, nas versões ilustrativas, é mais particularmente um instrumento cirúrgico de grampeamento e corte 10 que é capaz de praticar os benefícios exclusivos da presente invenção. Em particular, o instrumento cirúrgico de grampeamento e corte 10 é dimensionado para inserção, em um estado não-articulado, conforme representado na figura 1, através de uma passagem de cânula de trocarte em um local cirúrgico em um paciente (não mostrado) para executar um procedimento cirúrgico. Uma vez que uma porção de
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10/30 implemento 12 é inserida através de uma passagem de cânula, um mecanismo de articulação 14 incorporado em uma porção distal de um eixo alongado 16 da porção de implemento 12 pode ser remotamente articulado, conforme representado na figura 2, por um controle de articulação 18. Um formador de extremidade, representado na versão ilustrativa como uma montagem de aplicação de grampos 20, é distalmente conectado ao mecanismo de articulação 14. Desse modo, a articulação remota do mecanismo de articulação 14 articula assim a montagem de aplicação de grampos 20 de um eixo longitudinal do eixo alongado 16. Tal posição angulada pode apresentar vantagens em aproximar o tecido de um ângulo desejado para corte e grampeamento, em aproximar o tecido de outra maneira obstruído por outros órgãos e tecido, e/ou em permitir que um endoscópio seja posicionado atrás e seja alinhado com a montagem de aplicação de grampos 20 para confirmar a colocação.
[0028] O instrumento cirúrgico de grampeamento e corte 10 inclui uma porção de cabo 22 proximamente conectada à porção de implemento 12 para prover movimentos de posicionamento, de articulação, de fechamento e de disparo à mesma. A porção de cabo 22 inclui um agarre de pistola 24 na direção do qual um gatilho de fechamento 26 é pivotavelmente e proximamente puxado por um clínico para efetuar a fixação, ou o fechamento, da montagem de aplicação de grampos 20. Um gatilho de disparo 28 está mais distante do gatilho de fechamento 26 e é pi votavel mente puxado pelo clínico para fazer efetuar o grampeamento e o corte do tecido preso na montagem de aplicação de grampos 20. Depois disso, um botão de soltura de fechamento 30 é apertado para soltar o gatilho de fechamento preso 26, e, consequentemente, as extremidades cortadas e grampeadas do tecido preso. A porção de cabo 22 também inclui um botão de rotação 32 acoplado para movimento com o eixo alongado 16 para girar o eixo 16 e a monPetição 870170075544, de 05/10/2017, pág. 14/40
11/30 tagem de aplicação de grampos articulada 20 em torno do eixo longitudinal do eixo 16. A porção de cabo 22 também inclui um cabo de tração de disparo 34 para ajudar na retração de um mecanismo de disparo (não representado nas figuras 1-2), caso ocorra a ligação, de modo que a abertura da montagem de aplicação de grampos 20 possa ocorrer depois disso.
[0029] Será apreciado que os termos proximal e distal, são usados aqui com referência ao agarre de um cabo de um instrumento por parte de um clínico. Assim, a montagem de grampeamento cirúrgico 20 é distal com relação à porção de cabo mais proximal 22. Será adicionalmente apreciado que, para conveniência e clareza, termos espaciais, tais como vertical e horizontal são usados aqui com relação aos desenhos. Entretanto, instrumentos cirúrgicos são usados em muitas orientações e posições, e estes termos não se destinam a ser limitativos e absolutos.
[0030] Uma porção de cabo de múltiplos cursos ilustrativa 22 para o instrumento cirúrgico de grampeamento e corte 10 das figuras 1-2 é descrita em maiores detalhes no Pedido de Patente Norte-americano copendente e de propriedade comum intitulado de INSTRUMENTO DE GRAMPEAMENTO CIRÚRGICO QUE INCORPORA UM MECANISMO INDICADOR DE POSIÇÃO DE DISPARO E DE RETRAÇÃO DE MÚLTIPLOS CURSOS, para Swayze e Shelton IV, de Série No. 10/674.026, depositado em 29 de setembro de 2003, a descrição do qual é aqui incorporada para referência em sua totalidade, com características e variação adicionais, conforme descrito aqui. Enquanto uma porção de cabo de múltiplos cursos 22 vantajosamente sustenta aplicações com altas forças de disparo sobre uma longa distância, as aplicações consistentes com a presente invenção podem incorporar um único curso de disparo, tal como descrito no Pedido de Patente Norteamericano copendente e de propriedade comum INSTRUMENTO DE
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12/30
GRAMPEAMENTO CIRÚRGICO APRESENTANDO SISTEMAS DE FECHAMENTO E DISPARO DISTINTOS, para Frederick E. Shelton IV, Michael E. Setser, e Brian J. Hemmelgarn, de Série No. 10/441.632, depositado em 25 de novembro de 2004, a descrição do qual é aqui incorporada para referência em sua totalidade.
[0031] Nas figuras 3-4, a porção de implemento 12 vantajosamente incorpora os múltiplos movimentos de acionamento de rotação longitudinal, de articulação, de fechamento e de disparo dentro de um pequeno diâmetro adequado para procedimentos endoscópicos e laparoscópicos. A montagem de aplicação de grampos 20 (formador de extremidade) apresenta um par de garras pivotavelmente opostas, representado como um canal alongado 40 com uma bigorna pivotavelmente conectada 42 (Figuras 1-2, 4). O fechamento e a fixação da bigorna 42 no canal alongado 40 são realizados com a sustentação longitudinal do canal alongado 40 com uma montagem de armação 44 (Figura 3) giratoriamente conectada à porção de cabo 22 sobre a qual uma montagem de luva de fechamento de pivotamento duplo 46 se move longitudinalmente para conferir um fechamento e uma abertura respectivamente a um movimento distal e proximal para a bigorna 42, mesmo com a montagem de aplicação de grampos 20 articulada como na figura 2.
[0032] Com referência específica à figura 3, a montagem de armação 44 inclui uma base de armação de pivotamento único 48 cuja extremidade proximal é engatada ao botão de rotação 32, com um meioinvólucro direito 50 no mesmo mostrado na figura 3. Deve ser apreciado que uma extremidade proximal da montagem de luva de fechamento 46, especificamente de um tubo reto de fechamento 52, abrange a extremidade proximal do base de armação 48, passando adicionalmente internamente para a porção de cabo 22 para engatar os componentes de fechamento (não mostrados) que longitudinalmente transPetição 870170075544, de 05/10/2017, pág. 16/40
13/30 ladam a montagem de luva de fechamento 46. Um bordo 54 circular na extremidade proximal do tubo reto de fechamento 52 apresenta um engate de rotação para tais componentes. Os componentes de engate do botão de rotação 32 passam através de uma fenda longitudinal 56 em uma porção proximal do tubo de fechamento reto 52 para engatar uma abertura 58 proximamente posicionada na base de armação 48. A fenda longitudinal 56 tem um comprimento suficiente para permitir a translação longitudinal de fechamento da montagem de luva de fechamento 46 em vários ângulo rotacionais ajustados pelo botão de rotação 32 à montagem de luva de fechamento 46 e à base de armação 48.
[0033] O eixo alongado 16 sustenta o movimento de disparo com o recebimento de uma haste de disparo 60 que giratoriamente engata os componentes de disparo da porção de cabo 22 (não mostrada). A haste de disparo 60 entra em uma abertura proximal 62 ao longo da linha de centro longitudinal da base de armação 48. A porção distal da base de armação 48 inclui uma fenda de barra de disparo 64 ao longo de seu fundo que se comunica com a abertura proximal 62. Uma barra de disparo 66 translada longitudinalmente na fenda de barra de disparo 64 e inclui um pino proximal que se projeta para cima 68 que engata uma extremidade distal 70 da haste de disparo 60.
[0034] O eixo alongado 16 sustenta a articulação com a incorporação de uma cavidade de reservatório retangular 72, uma porção lateral da qual é descrita em uma porção distal do botão de rotação 32. Um compartimento inferior 74 que reside dentro da cavidade de reservatório retangular 72 apresenta chicanas direita e esquerda lateralmente espaçadas entre si 76, 78. Um atuador de articulação 80 desliza lateralmente sobre o topo do compartimento inferior 74, seus flanges esquerdo e direito espaçados lateralmente para baixo 82, 84, que ficam na parte externa das chicanas 76, 78, cada qual se comunicando latePetição 870170075544, de 05/10/2017, pág. 17/40
14/30 ralmente com os botões de apertar esquerdo e direito 86, 88 que se estendem para fora a partir dos respectivos meios invólucros do botão de rotação 32. O movimento lateral do atuador de articulação 80 arrasta os flanges esquerdo e direito 82, 84 para mais perto e mais longe, respectivamente, para as chicanas esquerda e direita 76, 78, operando contra as bexigas de reservatório esquerda e direita 90, 92 de um sistema de articulação fluídico 94, cada bexiga 90, 92 se comunicando respectivamente e distalmente aos condutos ou passagens de fluido esquerda e direita 96, 98 que, por sua vez, se comunicam, respectivamente, com as bexigas de acionamento esquerda e direita 100, 102. Estas se opõem e pivotam lateralmente uma barra em T 104 do mecanismo de articulação 14.
[0035] A montagem de armação 44 limita estas atuações fluídicas com a inclusão de um plano rebaixado superior e distal 106 da base de armação 48 sobre o qual reside as passagens de fluido 96, 98 e as bexigas de acionamento 100, 102. A barra em T 104 também reside deslizantemente sobre o plano rebaixado 106 entre as bexigas de acionamento 100, 102. Proximal à barra em T 104, uma nervura de barreira em relevo 108 é alinhada com relação à mesma, servindo para impedir a expansão interna das passagens de fluido 96, 98. A montagem de armação 44 apresenta uma cobertura de armação superior arredondada (espaçador) 110 que desliza sobre o topo da base de armação 48, impedindo a expansão vertical das passagens de fluido 96, 98 e das bexigas de acionamento 100, 102, bem como limitando qualquer movimento vertical da barra em T 104.
[0036] Uma extremidade distal (cremai hei ra) 112 da barra em T 104 é engatada para pivotar um segmento de engrenagem proximamente dirigido 115 de um membro de armação distal articulado 114 do mecanismo de articulação 14. Um anel de fechamento articulado 116 abrange o membro de armação articulado 114 e inclui uma abertura na
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15/30 forma de ferradura 118 que engata a bigorna 42. Uma conexão de pivotamento duplo é formada entre o tubo reto de fechamento 52 e o anel de fechamento articulado 116 sobre o mecanismo de articulação 14, permitindo o movimento de fechamento longitudinal, mesmo quando o mecanismo de articulação 14 for articulado. Em particular, as linguetas de pivotamento superior e inferior que se projetam distalmente 119, 120 no tubo reto de fechamento 52 apresentando orifícios de pino 122, 124 são, respectivamente, longitudinalmente espaçadas longe das linguetas de pivotamento superior e inferior que se projetam proximamente 126, 128 no anel de fechamento articulado 116 apresentando orifícios de pino 130, 132, respectivamente. Um elo de pivotamento duplo superior 134 apresenta pinos distal e traseiro direcionados para cima e longitudinalmente espaçados 136, 138 que engatam os orifícios de pino 130, 122, respectivamente, e um elo de pivotamento duplo inferior 140 apresenta pinos distal e traseiro que se projetam para baixo e longitudinalmente espaçados 142, 144 que engatam os orifícios de pino 132, 124, respectivamente.
[0037] Com referência específica à figura 4, o anel de fechamento articulado 116 é mostrado para uma melhor manufaturabilidade como incluindo um tubo curto 146 conectado a um colar de conexão articulado 148 que inclui as linguetas de pivotamento que se projetam proximamente 126, 128. Similarmente, o tubo de fechamento reto 52 é montado a partir de um tubo de fechamento longo 160 que é conectado a um colar de conexão traseiro 152 que inclui as linguetas de pivotamento que se projetam distalmente 119, 120. A abertura na forma de ferradura 118 no tubo de fechamento curto 146 engata uma característica de bigorna que se projeta para cima 154 ligeiramente proximal aos pinos de pivotamento laterais 156 que engatam os rebaixos de pivotamento 158 dentro do canal alongado 40.
[0038] A versão ilustrativa da figura 4 inclui um elo na forma de
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16/30 osso de cachorro 160 cujo pino proximal 157 pivotavelmente é conectado à base de armação 48 em um orifício de armação 161 e cujo pino distai 159 é rigidamente conectado a uma subsuperfície proximal 162 do membro de armação articulado 114, provendo assim um suporte pivotal entre eles. Uma fenda de lâmina longitudinal inferior 163 no elo na forma de osso de cachorro 160 guia uma porção de articulação da barra de disparo 66. O membro de armação articulado 114 também inclui uma fenda longitudinal inferior 164 para guiar uma porção distai da barra de disparo 66.
[0039] Com referência à figura 4, a barra de disparo 66 distalmente termina em uma viga E 165 que inclui os pinos de guia superiores 166 que entram em uma fenda de bigorna 168 na bigorna 42 para verificar e auxiliar na manutenção da bigorna 42 em um estado fechado durante a formação de grampos e o corte. O espaçamento entre o canal alongado 40 e a bigorna 42 é adicionalmente mantido pela viga E 165 com os pinos intermediários 170 deslizando ao longo da superfície superior do canal alongado 40 enquanto um pé inferior 172 opostamente desliza ao longo da subsuperfície do canal alongado 40, guiado por uma abertura longitudinal 174 no canal alongado 40. Uma superfície de corte distalmente apresentada 176 da viga E 165, que está entre os pinos de guia superior 166 e o pino intermediário 170, corta o tecido preso enquanto a viga E aciona um cartucho de grampos substituível 178 com o movimento distai de um trenó de cunha 180 que faz com que os acionadores de grampos 182 acionem ascendentemente os grampos de acionamento 184 para fora dos orifícios de grampo abertos ascendentemente 186 em um corpo de cartucho de grampos 188, formando contra uma subsuperfície de formação de grampos 190 da bigorna 42. Uma bandeja de cartucho de grampos 192 abrange a partir do fundo os outros componentes do cartucho de grampos 178 para prendê-los no lugar. A bandeja de cartucho de grampos 192 inclui
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17/30 uma fenda aberta na parte de trás 194 que se sobrepõe à abertura longitudinal 174 no canal alongado 40. Desse modo, os pinos intermediários 170 passam dentro da bandeja de cartucho de grampos 192. [0040] Concretizações da montagem de aplicação de grampos 20 são descritas em maiores detalhes no Pedido de Patente Norteamericano copendente e de propriedade comum de Série No. 10/955.042, INSTRUMENTO DE GRAMPEAMENTO CIRÚRGICO ARTICULADO QUE INCORPORA UM MECANISMO DE DISPARO DE VIGA E DE DUAS PEÇAS, para Frederick S. Shelton IV, e outros, depositado em 30 de setembro de 2004, a descrição do qual é aqui incorporada para referência em sua totalidade.
[0041] Nas figuras 3-4, um mecanismo de trava de articulação 200 é vantajosamente incorporado para manter a montagem de aplicação de grampos 20 em um ângulo de articulação desejado. O mecanismo de trava de articulação 200 reduz as cargas nas bexigas de acionamento esquerda e direita 100, 102. Em particular, uma mola de compressão 202 (Figura 3) é proximamente posicionada entre uma extremidade proximal 204 do membro de travamento de articulação 111 e a porção de cabo 22, pressionando o membro de travamento de articulação 111 distalmente. Com referência específica à figura 4, duas fendas paralelas 206, 208 em uma extremidade distal do membro de travamento de articulação 111 recebem, respectivamente, nervuras de guia que projetam respectivamente para cima 212, 214 na base de armação 48. As nervuras de guia 212, 214 são longitudinalmente mais curtas do que as fendas paralelas 206, 208 permitindo uma faixa de relativo percurso longitudinal. Assim, o engate contíguo seletivo de uma superfície de atrito distal, representado como um rebaixo dentado 216 que se projeta distalmente a partir do membro de travamento de articulação 111, é engatado em um segmento de engrenagem de travamento correspondente 217 em uma placa de freio 218 recebida em
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18/30 um rebaixo proximal superior 220 do membro de armação articulado 114. Orifícios distai e proximal 221, 222 na placa de freio 218 recebem pinos distai e proximal 223, 224 que se projetam para cima a partir do rebaixo proximal superior 220.
[0042] Concretizações do mecanismo de trava de articulação 200 são descritas em maiores detalhes no Pedido de Patente Norteamericano copendente e de propriedade comum de Série No. 11/061.908, INSTRUMENTO CIRÚRGICO QUE INCORPORA UM MECANISMO DE ARTICULAÇÃO CONTROLADO POR TRANSFERÊNCIA DE FLUIDO, para Kenneth S. Wales, e outros, depositado em 18 de fevereiro de 2005, a descrição do qual é aqui incorporada para referência em sua totalidade.
[0043] Nas figuras 3-4, a porção de implemento 12 vantajosamente incorpora um braço de bloqueio 226 pivotavelmente conectado ao canal alongado 40 e configurado para pivotar entre uma posição travada e uma posição destravada com relação à barra de disparo 66 com base em uma posição do trenó de cunha 180. O braço de bloqueio 226 é posicionado em torno da extremidade distai da barra de disparo 66 e inclui uma primeira extremidade 228 proximamente localizada com relação à viga E 165, uma segunda extremidade 230 que se estende em uma direção proximal longe da primeira extremidade 228 e ao longo da barra de disparo 66, e um meio de pivotamento 232 localizado entre as primeira e segunda extremidades 228, 230 para cooperativamente engatar os rebaixos de pivotamento 234 formados no canal alongado 40. Conforme mostrado, o meio de pivotamento 232 pode ser implementado como um par de pinos de pivotamento 232 simetricamente formado nos lados opostos do braço de bloqueio 226. O braço de bloqueio 226 define uma fenda de extremidade aberta 236 que passa através da primeira extremidade 228 e entra em uma porção da segunda extremidade 230, permitindo assim que o braço de
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19/30 bloqueio 226 seja posicionado em torno da barra de disparo 66 em uma configuração na forma de berço, de modo que a barra de disparo 66 possa passar através do braço de bloqueio 226.
[0044] A primeira extremidade 228 do braço de bloqueio 226 inclui um par de dentes simétricos 238 formado pela passagem da fenda de extremidade aberta 236 através do mesmo. Quando a barra de disparo 66 estiver na posição retraída, cada dente 238 será adjacentemente posicionado com relação a uma superfície lateral correspondente da viga E 165 e se estenderá distalmente ao longo da mesma. Conforme mostrado, cada dente 238 é caracterizado pela porção de inclinação descendente que transita para uma porção de ponta apresentando uma superfície achatada virada para cima adequada para ser compressi vel mente engatado por uma superfície inferior do trenó de cunha 180, quando presente na posição de disparo. A primeira extremidade 228 adicionalmente inclui um meio de pressionamento 240 para aplicar uma força direcionada para cima em oposição ao engate compressível dos dentes 238 pelo trenó de cunha 180. Consequentemente, quando o trenó de cunha 180 não estiver presente na posição não-disparada, o meio de pressionamento 240 fará com que a primeira extremidade 228 do braço de bloqueio 226 seja pivotavelmente levantada. Conforme mostrado, o meio de pressionamento 240 pode ser implementado como um par de prolongamentos de mola que se estendem para baixo 240 posicionados entre os dentes 238 e em contato com uma porção inferior do canal alongado 40.
[0045] A segunda extremidade 230 do braço de bloqueio 226 se estende proximamente longe da primeira extremidade 228 ao longo das superfícies laterais opostas da barra de disparo 66 e transita para uma porção inclinada para cima apresentando uma porção de ponta achatada 242 posicionada acima da barra de disparo 66. Conforme mostrado, a segunda extremidade 230 pode ser adequadamente conPetição 870170075544, de 05/10/2017, pág. 23/40
20/30 tornada, de modo que um vão livre seja provido entre o braço de bloqueio 226 e os pinos de pivotamento 156 da bigorna 42 durante a operação do instrumento 10. A segunda extremidade 230 inclui um pino de travamento 244 conectado à porção de ponta 242 e configurado para engatar um entalhe 246 definido pela barra de disparo 66, quando a segunda extremidade 230 for pivotada em uma posição comprimida com relação à mesma. Contrariamente, o pino de travamento 244 será desengatado do entalhe 246, quando a segunda extremidade 230 for pivotada na posição levantada com relação à barra de disparo 66. Um contorno inclinado 248 formado na barra de disparo 66 adjacente ao entalhe 246 e inclinado proximamente a partir daí é provido para guiar o pino de travamento 244 durante o movimento alternado da barra de disparo 66, conforme discutido abaixo em conexão com as figuras 6-8.
[0046] A posição da segunda extremidade 230 do braço de bloqueio 226 é determinada pelo engate da primeira extremidade 228 pelo trenó de cunha 180. Em particular, quando o trenó de cunha 180 estiver presente na posição não-disparada, o engate compressível dos dentes 238 pelo trenó de cunha 180 fará com que a segunda extremidade 230 seja pivotavelmente levantada com relação à barra de disparo 66. Consequentemente, o pino de travamento 244 é forçado a desengatar o entalhe 246, permitindo assim o movimento distal da barra de disparo 66 em resposta a um movimento de disparo. O engate comprimido da primeira extremidade 228 e o levantamento pivotal resultante da segunda extremidade 230 correspondem à posição destravada do braço de bloqueio 226. Quando o trenó de cunha 180 não estiver presente na posição não-disparada (por exemplo, subsequente a uma operação de disparo), o meio de pressionamento 240 servirá para pivotalmente levantar a primeira extremidade 228, fazendo com que a segunda extremidade 230 seja pivotavelmente comprimida com relaPetição 870170075544, de 05/10/2017, pág. 24/40
21/30 ção à barra de disparo 66. Consequentemente, o pino de travamento 244 engata o entalhe 246, impedindo assim o movimento distal da barra de disparo 66. O levantamento da primeira extremidade 228 e da depressão pivotal resultante da segunda extremidade 230 correspondem à posição travada do braço de bloqueio 226.
[0047] A figura 5 é uma vista em perspectiva superior frontal do formador de extremidade 20 na extremidade distal do instrumento cirúrgico de grampeamento e corte 10 das figuras 3 e 4, com a bigorna 42 removida e apenas o trenó de cunha 180 do cartucho de grampos 178 mostrado para fins de clareza. A barra de disparo 66 é representada em um estado retraído, com o braço de bloqueio 226 na posição destravada com relação à mesma. O engate comprimido dos dentes 238 resultante da presença do trenó de cunha 180 na posição nãodisparada resulta no levantamento pivotal da segunda extremidade 230 do braço de bloqueio 226 com relação à barra de disparo 66. Consequentemente, conforme mostrado na figura 5, o pino de travamento 244 é desengatado do entalhe 246, permitindo assim o movimento distal da barra de disparo 66. Mais importante ainda, devido ao fato da posição do braço de bloqueio 226 se basear apenas na posição do trenó de cunha 180, a operação do braço de bloqueio 226 não é afetada pela flexão da barra de disparo 66 resultante do acionamento do mecanismo de articulação 14.
[0048] As figuras 6-8 representam a operação sequencial do braço de bloqueio 226 dentro do formador de extremidade 20 das figuras 34, à medida que o instrumento cirúrgico de grampeamento e corte 10 é disparado. Na figura 6, um cartucho de grampos não-disparado 178 foi inserido no canal alongado 40, com o trenó de cunha 180 compressivelmente engatando os dentes 238 do braço de bloqueio 226. Consequentemente, o braço de bloqueio 226 está na posição destravada e o pino de travamento 244 está desengatado da fenda 246 da barra de
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22/30 disparo 66.
[0049] Na figura 7, o disparo do cartucho de grampos 178 começou, com o trenó de cunha 180 apresentando um percurso distai dos dentes 238 do braço de bloqueio 226. Consequentemente, a primeira extremidade 228 do braço de bloqueio 226 é pivotavelmente levantada pelo meio de pressionamento 240, fazendo com que o pino de travamento 244 entre em contato com a barra de disparo 66. Durante o movimento distai subsequente da barra de disparo 66, o pino de travamento 244 é continuamente mantido em contato deslizante com a barra de disparo 66 e percorre uma porção proximal da mesma, incluindo a porção contornada 248.
[0050] Na figura 8, a barra de disparo 66 é mostrada imediatamente subsequente a sua retração. O pino de travamento 244 novamente percorre a porção proximal da barra de disparo 66 na direção oposta, terminando com seu alinhamento vertical com o entalhe 246. Devido ao fato de o trenó de cunha 180 não mais estar presente na posição não-disparada, a segunda extremidade 230 do braço de bloqueio 226 é mantida em uma posição comprimida com relação à barra de disparo 66, resultando no engate do entalhe 246 pelo pino de travamento 244, conforme mostrado na figura 8. A compressão do meio de pressionamento 240 resultante do percurso do pino de travamento 244 ascendentemente acima da porção contornada 248 assegura que o entalhe 246 seja engatado pelo pino de travamento 244 com um grau adequado de força. Consequentemente, o braço de bloqueio 226 está na posição de travamento, e o movimento distai da barra de disparo 66 é impedido até que o cartucho de grampos gasto 178 seja substituído. [0051] Como uma alternativa ao braço de travamento 226 das figuras 3-4, concretizações da porção de implemento 12 da figura 9 vantajosamente incorporarão pelo menos uma montagem de bloqueio 250 montada dentro do canal alongado 40 e adjacentemente posicionada
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23/30 com relação a uma superfície lateral correspondente da viga E 165, quando a barra de disparo 66 estiver na posição retraída. Nas concretizações preferidas, e conforme mostrado na figura 9, duas montagens de bloqueio 250 são providas, embora seja apreciado que uma única montagem de bloqueio 250 possa ser utilizada no lugar. Cada montagem de bloqueio 250 inclui um cartucho de bloqueio 252 movelmente disposto dentro de um rebaixo correspondente 254 definido pela superfície inferior do canal alongado 40 e configurado para ser movido entre uma posição travada e uma posição destravada com relação à viga E 165 com base na posição do trenó de cunha 180. Cada montagem de bloqueio 250 adicionalmente inclui um meio de pressionamento 156 para aplicar uma força dirigida ascendentemente ao cartucho de bloqueio 252, de tal modo que uma porção do cartucho de bloqueio 252 seja forçada a se projetar a partir do rebaixo correspondente 254, quando o trenó de cunha 180 não estiver presente na posição nãodisparada. Conforme mostrado na figura 9, o meio de pressionamento 256 para cada cartucho de bloqueio 252 pode ser implementado como um prolongamento de mola 256 apresentando uma primeira extremidade se estendendo para dentro 258 conectada ao cartucho de bloqueio 252, e uma segunda extremidade se estendendo para cima 260 conectada a uma superfície lateral do canal alongado 40. Quando em um estado relaxado (isto é, não-comprimido), a primeira extremidade 258 será inclinada para cima, de tal modo que uma porção do cartucho de bloqueio 252 se projete adequadamente a partir de seu rebaixo correspondente 254, conforme melhor visto na figura 10 discutida abaixo. Preferivelmente, a segunda extremidade 260 de cada prolongamento de mola 256 é conectada em uma maneira nivelada (por exemplo, dentro de um rebaixo formado) à superfície do canal alongado correspondente 40, de modo que o cartucho de grampos 178 possa ser acomodado pelo canal alongado 40 sem modificação.
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24/30 [0052] A figura 10 é uma vista em perspectiva superior frontal do formador de extremidade montado 20 da figura 9 na extremidade distai do instrumento cirúrgico de grampeamento e corte 10, com o cartucho de grampos 178 e a bigorna 42 removidos para fins de clareza. Conforme mostrado, cada cartucho de bloqueio 252 inclui uma primeira superfície lateral virada proximamente 262 configurada para engatar um pino intermediário correspondente 170 da viga E 165, quando o cartucho de bloqueio 252 estiver na posição travada (isto é, se projetando a partir do rebaixo 254 do canal alongado 40). O engate dos pinos intermediários 170 pelo cartucho de bloqueio 252, quando na posição travada, impedirá assim o movimento distai da barra de disparo 66.
[0053] Cada cartucho de bloqueio 252 pode adicionalmente incluir uma segunda superfície virada para cima 264 configurada para engate por uma superfície inferior do trenó de cunha 180, quando presente na posição não-disparada. O engate das segundas superfícies 264 é suficiente para superar a força aplicada aos cartuchos de bloqueio 252 pelo meio de pressionamento 256. Como resultado, cada cartucho de bloqueio 252 é comprimido em seu rebaixo correspondente 254, de tal modo que a primeira superfície 262 seja desengatada do pino intermediário correspondente 170 da viga E 165, permitindo assim o movimento distai da barra de disparo 66. A posição comprimida de cada cartucho de bloqueio 252 corresponde à posição travada do mesmo. [0054] Cada cartucho de bloqueio 252 pode adicionalmente incluir uma terceira superfície inclinada virada distalmente 266, configurada para o engate deslizante do pino intermediário correspondente 170 da viga E 165 imediatamente antes da retração da barra de disparo 66. O engate da terceira superfície 266 opera assim para momentaneamente comprimir cada cartucho de bloqueio 252, permitindo assim que a barra de disparo 66 seja totalmente retraída. Com a total retração da barPetição 870170075544, de 05/10/2017, pág. 28/40
25/30 ra de disparo 66, cada cartucho de bloqueio 252 é forçado a se projetar a partir de seu rebaixo correspondente 254 na posição travada, de tal modo que a primeira superfície 262 engate o pino intermediário correspondente 170. Mais importante, devido ao fato de a posição dos cartuchos de trava 252 se basear apenas na posição do trenó de cunha 180, a operação das montagens de bloqueio não é afetada pela flexão da barra de disparo 66 resultante do acionamento do mecanismo de articulação 14.
[0055] As figuras 11-13 descrevem a operação sequencial das montagens de bloqueio 250 dentro do formador de extremidade das figuras 9-10, à medida que o instrumento cirúrgico de grampeamento e corte 10 é disparado. Na figura 11, um cartucho de grampos nãodisparado 178 foi inserido no canal alongado 40, com o trenó de cunha 180 engatando as segundas superfícies 264, de tal modo que cada cartucho de bloqueio 252 seja comprimido em seu rebaixo correspondente 254 dentro do canal alongado 40. Consequentemente, cada cartucho de bloqueio 252 é mantido na posição destravada, e as primeiras superfícies 262 são desengatadas dos pinos intermediários correspondentes 170 da viga E 165.
[0056] Na figura 12, o disparo do cartucho de grampos 178 foi iniciado, com o trenó de cunha 180 (não mostrado) apresentando um percurso distal das segundas superfícies 264 dos cartuchos de bloqueio 252. Consequentemente, os cartuchos de bloqueio 252 são forçados a se projetarem a partir de seus rebaixos correspondentes 254 como resultado da força aplicada aos mesmos pelo meio de pressionamento 256.
[0057] Na figura 13, a viga E 165 é mostrada na posição totalmente retraída subsequente ao engate deslizante das terceiras superfícies 266 dos cartuchos de bloqueio 252 pelos pinos intermediários correspondentes 170. Devido ao fato de trenó de cunha 180 não mais estar
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26/30 presente na posição não-disparada, cada cartucho de bloqueio 252 se projeta a partir de seu rebaixo correspondente 254 na posição travada, de tal modo que os pinos 170 sejam engatados pelas primeiras superfícies 262, impedindo assim o movimento distai subsequente da barra de disparo 66 até que o cartucho de grampos gasto 178 seja substituído.
[0058] Como uma alternativa ao braço de bloqueio das figuras 3-4 e às montagens de bloqueio 250 das figuras 9-10, concretizações da porção de implemento 12 da figura 14 vantajosamente incorporam uma barra de disparo de duas peças 268 incluindo uma porção distai 270 pi votavel mente conectada a uma porção proximal 252. A porção distai 270 da barra de disparo 286 é configurada para pivotar entre as posições travada e destravada com relação ao canal alongado 40 com base em uma posição do trenó de cunha 180.
[0059] Conforme mostrado na figura 14, a porção proximal 272 inclui um par de pinos de pivotamento 274 distalmente posicionado nas superfícies laterais opostas da mesma. A porção distai 270 inclui um par de placas de pivotamento simetricamente formadas 276, cada qual apresentando um orifício proximal 278 formado na mesma para cooperativamente engatara um pino de pivotamento correspondente 274 da porção proximal 272. A porção distai 270 adicionalmente inclui uma viga E 280, similar à viga E 165 descrita acima e apresentando um rebaixo proximal contornado 282 para engatar um pino opostamente contornado 284 formado pela extremidade distai de cada placa de pivotamento 276, permitindo assim que uma conexão geralmente rígida seja formada entre eles. A porção distai 270 da barra de disparo 268, incluindo a viga E 280, pode assim pivotar em um plano vertical com relação à porção proximal 272 da mesma.
[0060] Cada placa de pivotamento 276 adicionalmente inclui um pino que se estende para baixo 286 formado na parte inferior na exPetição 870170075544, de 05/10/2017, pág. 30/40
27/30 tremidade distal da mesma e compreendendo uma superfície contornada virada proximamente 288. Quando as placas de pivotamento 276 forem engatadas pela viga E 280, os pinos 286 serão mantidos em alinhamento, definindo efetivamente assim um pino comum. Quando a barra de disparo 268 estiver na posição totalmente retraída, os pinos 286 entrarão em contato com uma porção inferior do canal alongado 40 adjacente à extremidade proximal da abertura longitudinal 174, mantendo assim sustentavelmente a porção distal 270 em uma posição levantada com relação ao canal alongado 40. Quando a barra de disparo 268 estiver em uma posição diferente da posição totalmente retraída (por exemplo, durante a extensão ou a retração), os pinos 286 serão alinhados com a fenda longitudinal 174 e não mais entrarão em contato com uma porção inferior do canal alongado 40. Desse modo, para tais posições, a porção distal 270 não é sustentada pelos pinos 286.
[0061] A viga E 280 inclui um ressalto 290 formado na extremidade distal da mesma configurada para o engate sustentável por um trenó de cunha de porção proximal 180. Consequentemente, durante o movimento distal do trenó de cunha 180 resultante da extensão da barra de disparo 268, o ressalto 290 mantém a viga E 280 (e, portanto, a porção distal 270 da barra de disparo 268) em uma posição levantada com relação ao canal alongado 40. A posição levantada da porção distal 270 resultante do engate suportável do ressalto 290 pelo trenó de cunha 180 corresponde à posição destravada da mesma.
[0062] Conforme visto na figura 15, o canal alongado 40 inclui um par de rebaixos 292 definido por uma porção inferior do mesmo e simetricamente disposto nos lados opostos da fenda longitudinal 174. Os rebaixos 292 são posicionados de tal modo que cada um fique localizado sob e ligeiramente adiante de um pino intermediário correspondente 170 da viga E 280, quando a barra de disparo 268 estiver
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28/30 totalmente retraída. Quando o trenó de cunha 180 não estiver presente na posição não-disparada, o ressalto 290 da viga E 280 ficará desamparado durante a extensão da barra de disparo 268. A porção distal 270 da barra de disparo 268 pode assim pivotar para baixo em uma posição comprimida com relação ao canal alongado 40, de tal modo que os pinos intermediários 170 sejam recebidos nos rebaixos correspondentes 292. Cada rebaixo 292 define uma superfície distal verticalmente orientada 294 para engatar uma porção distal oposta do pino intermediário correspondente 170, impedindo assim o movimento distal adicional da barra de disparo 268. A posição comprimida da porção distal 270 corresponde assim à posição travada da mesma. Conforme mostrado na figura 14, um meio de pressionamento 296, representado como membro de mola 296, pode ser incorporado dentro da porção de implemento 12 para o pressionamento descendente da porção distal 270 na posição travada.
[0063] Com referência novamente à figura 15, cada rebaixo 292 adicionalmente define uma superfície proximal inclinada 298 para deslizantemente engatar os pinos intermediários correspondentes 170 durante a retração da barra de disparo 268, de tal modo que a porção distal 270 seja forçada a pivotar ascendentemente, facilitando assim a extração dos pinos intermediários 170 dos rebaixos 292. A retração da barra de disparo 268 para a posição totalmente retraída faz com que as superfícies contornadas 288 dos pinos 286 deslizantemente engatem a porção inferior do canal alongado 40 adjacente à extremidade proximal da fenda longitudinal 174, deslocando a porção distal 270 para a posição destravada.
[0064] Na figura 15, a barra de disparo 286 é representada em um estado totalmente retraído, com a porção distal 270 mantida na posição pivotalmente levantada (isto é, posição destravada) com relação ao canal alongado 40. Mais importante ainda, devido ao fato de apePetição 870170075544, de 05/10/2017, pág. 32/40
29/30 nas a porção distal 270 da barra de disparo 268 precisar ser levantada ou comprimida para transitar entre as posições destravada e travada, o mecanismo de travamento não é afetado por qualquer flexão da porção proximal 272 resultante do acionamento do mecanismo de articulação 14.
[0065] As figuras 16-18 representam a operação sequencial da barra de disparo 268 dentro do formador de extremidade 20 da figura 14, à medida que o instrumento cirúrgico de grampeamento e corte 10 é disparado. Na figura 16, um cartucho de grampos não-disparado 178 foi inserido no canal alongado 40, com uma porção proximal do trenó de cunha 180 sustentavelmente engatando o ressalto 290 da viga E 280. A porção distal 270 é sustentada na posição levantada (isto é, destravada) pelos pinos 286, e os pinos intermediários 170 são posicionados acima dos rebaixos correspondentes 292.
[0066] Na figura 17, foi iniciado o disparo do cartucho de grampos 178. Embora a porção distal 270 não seja mais sustentada pelos pinos 286, o engate do ressalto 290 pelo trenó de cunha 180 impede que a porção distal 270 pivote descendentemente em resposta à força aplicada à mesma pelos meios de pressionamento 296. Dessa forma, a porção distal 270 permanece suficientemente levantada, de tal modo que os pinos intermediários 170 não sejam recebidos nos rebaixos 292, permitindo o movimento distal continuado da barra de disparo 268.
[0067] Na figura 18, a barra de disparo 268 é mostrada depois de ter sido totalmente retraída e novamente disparada sem a substituição do cartucho de grampos agora gasto 178. Devido ao fato de o trenó de cunha 180 não mais estar presente, o ressalto 290 da viga E 280 não é sustentavelmente engatado pela mesma. O meio de pressionamento 296 faz assim com que a porção distal 270 seja pi votavel mente comprimida na posição de travamento, de tal modo que os pinos intermePetição 870170075544, de 05/10/2017, pág. 33/40
30/30 diários 170 sejam recebidos nos rebaixos correspondentes 292. O engate dos pinos intermediários 170 pelas superfícies distais 294 dos rebaixos 292 impede o movimento distal adicional da barra de disparo 268.
[0068] Enquanto a presente invenção foi ilustrada pela descrição de diversas concretizações e enquanto as concretizações ilustrativas foram descritas em detalhes consideráveis, não é intenção do requerente restringir ou de qualquer maneira limitar o escopo das reivindicações anexas a tais detalhes. Vantagens e modificações adicionais poderão se tornar prontamente evidentes àqueles versados na técnica. [0069] Por exemplo, será apreciado que concretizações dos mecanismos de travamento acima descritos podem ser incorporadas nos instrumentos cirúrgicos de grampeamento e corte articulados apresentando mecanismos de articulação controláveis por um meio que não um acionamento fluídico, tais como mecanismos de articulação acionados a engrenagem. Será adicionalmente apreciado que concretizações dos mecanismos de travamento acima descritos não são limitadas em sua aplicação aos desenhos de instrumento articulado, podendo também ser vantajosamente incorporadas em instrumentos nãoarticulados.
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Claims (5)
- REIVINDICAÇÕES1. Formador de extremidade (20) para uso com um instrumento cirúrgico, o formador de extremidade (20) compreendendo:um canal (40) que recebe um cartucho de grampos; um dispositivo de disparo recíproco (66) responsivo a um movimento de disparo produzido pelo instrumento cirúrgico para progressivamente acionar um membro de cunha (180) a partir de uma posição não-disparada para uma posição disparada;uma bigorna (42) conectada de forma articulável ao canal (40); e um braço de bloqueio (226) pivotavelmente conectado ao canal (40) e configurado para permanecer em uma posição destravada em relação ao dispositivo de disparo (66) quando o membro de cunha (180) está em uma posição não-disparada, e para pivotar para uma posição travada quando o membro de cunha está em uma posição de disparo, caracterizado pelo fato de que o braço de bloqueio compreende uma primeira extremidade (228), uma segunda extremidade (230) e meios de pivotamento (232) localizados entre a primeira (228) e a segunda extremidade (230), os meios de pivotamento (232) cooperando com o canal (40);o formador de extremidade (20) compreendendo ainda um meio de pressionamento (240) configurado para aplicar uma força de elevação à primeira extremidade (228) do braço de bloqueio, a primeira extremidade (228) do braço de bloqueio sendo configurada para ser comprimida quando o membro de cunha (180) está na posição nãodisparada e elevado quando o membro de cunha (180) está na posição de disparo; e em que a segunda extremidade (230) do braço de bloqueio compreende um pino de travamento (244) para encaixar um entalhePetição 870170075544, de 05/10/2017, pág. 35/40
- 2/2 (246) definido pelo dispositivo de disparo (66) quando o braço de bloqueio está na posição bloqueada de modo que o movimento distal do dispositivo de disparo é impedido.2. Instrumento cirúrgico (10) compreendendo o formador de extremidade conforme definido na reivindicação 1, compreendendo:uma porção de cabo (22) operavelmente configurada para produzir um movimento de disparo;um cartucho de grampos (178) engatado pelo canal (40) e incluindo uma pluralidade de acionadores de grampos (184) e grampos (182), os acionadores de grampos (184) acionando os grampos (182) na direção da bigorna (42);um membro de cunha (180) proximal e longitudinalmente alinhado com os acionadores de grampos (184);caracterizado pelo fato de que o canal (40) é acoplado à porção de cabo (22); e em que a bigorna (42) é pivotavelmente conectada ao canal (40).
- 3. Instrumento cirúrgico, de acordo com a reivindicação 2, caracterizado pelo fato de que ainda compreende um eixo (16) para conectar a porção de cabo (22) ao canal (40), o eixo (16) compreendendo um mecanismo de articulação (14).
- 4. Instrumento cirúrgico, de acordo com a reivindicação 2, caracterizado pelo fato de que o braço de bloqueio define uma fenda de extremidade aberta (236) que passa através da primeira extremidade e entra em uma porção da segunda extremidade.
- 5. Instrumento cirúrgico, de acordo com a reivindicação 1, caracterizado pelo fato de que a primeira extremidade do braço de bloqueio é operavelmente configurada para o engate compressível pelo membro de cunha (180).Petição 870170075544, de 05/10/2017, pág. 36/40
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-
2005
- 2005-11-04 US US11/266,961 patent/US7328828B2/en not_active Expired - Lifetime
-
2006
- 2006-10-20 AU AU2006230750A patent/AU2006230750B2/en not_active Ceased
- 2006-10-30 CA CA2566668A patent/CA2566668C/en not_active Expired - Fee Related
- 2006-11-02 JP JP2006299353A patent/JP5154060B2/ja not_active Expired - Fee Related
- 2006-11-03 DE DE602006019805T patent/DE602006019805D1/de active Active
- 2006-11-03 AT AT06255683T patent/ATE496580T1/de not_active IP Right Cessation
- 2006-11-03 MX MXPA06012763A patent/MXPA06012763A/es active IP Right Grant
- 2006-11-03 BR BRPI0604524A patent/BRPI0604524B8/pt not_active IP Right Cessation
- 2006-11-03 CN CN2006101437533A patent/CN1957854B/zh not_active Expired - Fee Related
- 2006-11-03 EP EP06255683A patent/EP1782738B1/en not_active Not-in-force
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0604524B8 (pt) | 2021-06-22 |
| JP2007125396A (ja) | 2007-05-24 |
| AU2006230750A1 (en) | 2007-05-24 |
| EP1782738A2 (en) | 2007-05-09 |
| JP5154060B2 (ja) | 2013-02-27 |
| AU2006230750B2 (en) | 2012-03-08 |
| ATE496580T1 (de) | 2011-02-15 |
| EP1782738B1 (en) | 2011-01-26 |
| US7328828B2 (en) | 2008-02-12 |
| MXPA06012763A (es) | 2007-05-03 |
| CN1957854B (zh) | 2011-04-20 |
| CA2566668C (en) | 2014-08-26 |
| EP1782738A3 (en) | 2007-07-04 |
| DE602006019805D1 (de) | 2011-03-10 |
| CN1957854A (zh) | 2007-05-09 |
| CA2566668A1 (en) | 2007-05-04 |
| US20070102475A1 (en) | 2007-05-10 |
| BRPI0604524A (pt) | 2007-08-28 |
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