Patent ID: 7449000

Claim:
A medical instrument, comprising: a housing; a stylet having a portion in the housing, the stylet being movable between an extended position and a retracted position; a stylet block attached to a proximal end of the stylet; a cannula coaxially receiving the stylet and having a portion in the housing, the cannula being movable between an extended position and a retracted position; a cannula block attached to a proximal end of the cannula; a single member slidably coupled to a surface of the housing that actuates both the cannula and the stylet; a second bar within the housing, wherein the second bar is capable of moving the stylet block from an extended position to a retracted position; and a first bar within the housing coupled to the member, wherein the first bar is capable of being in a first position in which the first bar is engageable with the cannula block to move the cannula block and cannula to the retracted position without moving the stylet block, and in a second position in which the first bar is engageable with the second bar to move the stylet block and stylet to the retracted position.