Surgery – Instruments – Cutting – puncturing or piercing
Patent
1994-11-08
1996-06-18
Thaler, Michael H.
Surgery
Instruments
Cutting, puncturing or piercing
604164, A61B 1734
Patent
active
055273351
ABSTRACT:
A cannula is extended through the wall of a body cavity by a trocar having a piercing head slidable through the cannula between a condition extending distally from the cannula and a condition retracted within the cannula. A latch releasably secures the piercing head in the extended condition against the force of a spring which normally biases the piercing head to the retracted condition. Resiliently biased plungers extend longitudinally of the piercing head for retraction in response to counterforce as the piercing head advances through the wall of a body passage and extension upon the release of the counterforce. Extension of the plungers upon release of the counterforce functions to release the piercing head for retraction.
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Bolduc Lee R.
Loomas Bryan E.
Miller Scott H.
Origin Medsystem, Inc.
Thaler Michael H.
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