Handle for endoscopic surgical instruments and jaw structure

Details Handle for endoscopic surgical instruments and jaw structure Handle for endoscopic surgical instruments and jaw structure

A - Human Necessities

61

B

A61B 17/32 (2006.01) A61B 17/28 (2006.01) A61B 17/30 (2006.01)

Patent

CA 2103773

An endoscopic or laparoscopic surgical instrument having an internally disposed ratchet mechanism located within a barrel portion of a handle assembly.The instrument includes a handle assembly having a pivoting handle and a stationary handle, a barrel portion to which an elongated body assembly is secured, and a ratchet mechanism for releasably positioning a tool mechanism located at the distal end of the body assembly at various increments. The ratchet mechanism comprises a pawl member and a rack member which are disposed within the handle assembly. A rotational knob and locking member may also be provided to lock the body assembly at various orientations to the longitudinal axis. The tool assembly includes novel atraumatic jaw mechanisms incorporating flexural characteristics to better gauge the force being applied to the capture tissue. The novel jaw mechanisms further includes increased tissue gripping surface area and multiple tissue handling portions which allow users to use fewer instruments and reduce the time to perform procedures.

L'invention porte sur un instrument chirurgical endoscopique ou laparoscopique comportant un mécanisme d'encliquetage interne placé à l'intérieur d'un canon d'un ensemble poignées. L'instrument comprend un ensemble poignées ayant une poignée pivotante et une poignée fixe, un canon sur lequel un corps allongé est monté, et un mécanisme d'encliquetage permettant de positionner de façon non permanente un mécanisme d'outil placé à l'extrémité distale du corps à différents échelons. Le mécanisme d'encliquetage comporte un élément cliquet et un élément crémaillère, lesquels sont fixés à l'intérieur de l'ensemble poignées. Un bouton rotatif et un élément de verrouillage peuvent également être prévus pour bloquer le corps à différents angles par rapport à l'axe longitudinal. L'ensemble outils comprend des mécanismes de mâchoires atraumatiques innovateurs incorporant des caractéristiques de flexion pour mieux évaluer la force appliquée sur les tissus saisis. Ces mécanismes de mâchoires innovateurs comportent également une surface de préhension des tissus accrue et de multiples parties de manipulation des tissus qui permettent aux utilisateurs de se servir de moins d'instruments et de réduire le temps d'exécution des interventions.

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