| 摘要 |
<p>A safety penetrating instrument (20) includes a housing (28); a portal sleeve (26) mounted by the housing (28); a penetrating member (36) disposed within the portal sleeve (26) and movable between an extended position where a distal end (60) thereof protrudes from the distal end (30) of the portal sleeve (26) at a proximally spaced retracted position; a distally biased safety probe (42) disposed within the penetrating member (36) and movable between an extended position protecting the penetrating member distal end (60) when the penetrating member (36) is retracted, and a retracted position exposing the penetrating member distal end (60) when the penetrating member (36) is extended; a retracting mechanism (74) for moving the penetrating member (36) from the extended position to the retracted position thereof; a handle (108) for manually moving the penetrating member (36) from the retracted position to the extended position; and a locking and releasing mechanism (78) for locking the penetrating member (36) in the extended position and subsequently releasing the penetrating member (36) permitting such to move proximally to the retracted position responsive to penetration into the anatomical cavity.</p> |
