Appeal No. 96-2631
Application No. 08/177,616
14. A method of forming a portal in the wall of an
anatomical cavity comprising the steps of
penetrating the anatomical cavity wall with a penetrating
member of a safety penetrating instrument having a protective
state where the penetrating member is protected and a trigger
member movable proximally a proximal distance corresponding to
the thickness of the anatomical cavity wall; and
triggering the safety penetrating instrument to move to the
protective state when the trigger member has moved the proximal
distance.
22. A method of penetrating tissue comprising the steps of
penetrating the tissue with the distal end of a penetrating
member of a safety penetrating instrument including a cannula
receiving the penetrating member and adapted to remain in the
tissue after the penetrating member is withdrawn from the
cannula; and
triggering the safety penetrating instrument to move the
safety penetrating instrument to a protective state where the
penetrating member is protected as soon as a trigger member of
the safety penetrating instrument has moved proximally a distance
corresponding to a desired predetermined depth of penetration by
the safety penetrating instrument into the tissue.
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