| 摘要 |
A safety penetrating instrument includes a penetrating member, a safety member movable between an extended position where the safety member distal end protrudes distally of the penetrating member distal end and a retracted position where the safety member distal end is disposed proximally of the penetrating member distal end, an extending mechanism for moving the safety member distally from the retracted position to the extended position, a handle for manually moving the safety member proximally from the extended position to the retracted position and a lock for locking the safety member in the retracted position. A releasing mechanism responsive to distally-biased movement of the safety member and/or the penetrating member upon penetration into the anatomical cavity triggers release of the lock to permit the extending mechanism to move the safety member to the extended position.
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