Safety penetrating instrument with protective sheath, triggered penetrating member retraction and single and safety member protrusion
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United States of America Patent
Stats
-
Sep 15, 1998
Issued Date -
N/A
app pub date -
Jul 7, 1997
filing date -
Dec 18, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A safety penetrating instrument for establishing a portal in a wall of an anatomical cavity includes a cannula, a penetrating member disposed in the cannula, a protective sheath disposed between the penetrating member and the cannula to place the tip of the penetrating member in a protected, non-exposed state, and various mechanisms for simultaneously retracting one or both of the penetrating member and the protective sheath while extending the cannula. Retraction of one or both of the penetrating member and the protective sheath and extension or protrusion of the cannula is triggered individually or in combination by movement of one or more of the three members upon entering the anatomical cavity. Additionally, a probe can be carried by the safety penetrating instrument for triggering retraction and/or extension of the members in a similar manner or upon moving a predetermined proximal distance during penetration of the anatomical cavity wall.
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