Patent ID: 8043228
Filing Date: 2011-10-25
Classification: A61B

Abstract:
1. A medical instrument comprising: a housing; a stylet having a portion in the housing and extending through a first end of the housing, the stylet being movable between an extended position and a refracted position; a stylet block attached to the stylet; a cannula coaxially receiving the stylet, the cannula having a portion in the housing, and extending through the first end of the housing, the cannula being movable between an extended position and a retracted position; a cannula block attached to the cannula; a lever connected to the housing such that the lever rotates about an axis at the first end of the housing; and a link member comprising a first end and a second end located opposite of the first end, the first end of the link member pivotably attached to the lever and the second end of the link member free to rotate about the first end of the link member; wherein the second end of the link member is operable to engage the cannula block when the cannula is in the extended position of the cannula and is operable to engage the stylet block when the cannula is in the retracted position of the cannula.