SAFETY PENETRATING INSTRUMENT WITH PENETRATING MEMBER AND SAFETY MEMBER MOVING DURING PENETRATION AND TRIGGERED SAFETY MEMBER PROTRUSION

摘要

A safety penetrating instrument (20) for penetrating an anatomical cavity wall (W) includes a penetrating member (38) having a distal end, a distally-biased safety member (26) having a distal end movable between an extended position protecting the distal end of the penetrating member (38) and a retracted position exposing the distal end of the penetrating member (38), an extending mechanism (48) for moving the safety member (26) to the extended position and for permitting the safety member (26) to move proximally toward the retracted position, a handle (24) for manually moving the safety member (26) to the retracted position, and a lock (64) for locking the safety member (26) in the retracted position during penetration of the wall. A trigger (82) is responsive to movement of the penetrating member (38) or the safety member (26) toward the retracted position to release the lock (64).