Importance

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Abstract

An endoscopic surgical grasper for use by the human hand comprising a handle adapted to fit into the human hand. A rigid tubular member having proximal and distal extremities is provided and has the proximal extremity secured to the handle in a predetermined position longitudinal of the handle. A push rod having proximal and distal extremities is slidably mounted in the tubular member. A stop is carried by the handle. A knob assembly is slidably mounted on said tubular member and is movable from a first position in engagement with the stop and a second position away from the stop longitudinal of the tubular member. The knob assembly includes a plunger slidably mounted on said tubular member. A pin and slot mechanism couples the plunger to the proximal extremity of the push rod and permits limited movement of said push rod longitudinally of the tubular member while preventing rotational movement of the plunger relative to the tubular member. The knob assembly also includes a knob rotatably mounted on said handle and threadedly engaging the plunger and has a portion adapted to engage the stop in the handle. A spring is disposed within the tubular member and yieldably urges the plunger and the push rod in a distal direction to the second position of said knob assembly. Jaw-like grasping members movable between open and closed positions are carried by the distal extremity of the tubular member. A linkage mechanism connects the first and second grasping members to the push rod.

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First Claim