Cannula cap including yeildable outer seal and flapper valve

A cannula cap for positioning on a proximal end of a cannula of a type for receiving an instrument therethrough, said cannula cap comprising:

• a monolithic elastomeric cap body comprising a sidewall portion for engaging a proximal end of a cannula, and an end portion connected to said sidewall portion, said end portion having a bore therethrough defining an instrument receiving passageway, said end portion further comprising an instrument seal portion having an outer opening for receiving the instrument therethrough and forming a gas seal therewith, said cap body further including a series of transverse ribs on an exterior thereof, said instrument seal portion comprising
• a reduced thickness wall portion adjacent the outer opening and extending in a plane transverse to the instrument receiving passageway,
• an outwardly extending pleat surrounding the reduced thickness wall portion, and
• a generally planar outer portion surrounding said pleat and being generally aligned with an imaginary plane defined by said reduced thickness wall portion;
• and
• a flapper valve positioned within an interior of said cap body and movable between an open position when an instrument is positioned within the instrument receiving passageway and a closed position when an instrument is removed from the instrument receiving passageway, said flapper valve having a hinge portion including a plurality of spaced apart straps.

A cannula cap for positioning on a proximal end of a cannula of a type for receiving an instrument therethrough, said cannula cap comprising:

• a cap body for engaging a proximal end of a cannula, said cap body comprising an end portion having a bore therethrough defining an instrument receiving passageway, said cap body further including a series of transverse ribs on an exterior thereof;
• and
• a monolithic flapper valve positioned adjacent said cap body and comprising
• a flapper portion,
• a flapper mounting portion positioned adjacent said cap body, and
• an integrally formed hinge portion connecting said flapper mounting portion to said flapper portion for permitting said flapper portion to move to an open position when an instrument is positioned within the instrument receiving passageway and for biasing said flapper portion toward a closed position when an instrument is removed from said instrument receiving passageway, said hinge portion having a plurality of spaced apart straps extending between said flapper mounting portion and said flapper portion.

A medical device for insertion into a body and comprising:

• a cannula comprising a tube having a distal end and a proximal end;
• and
• a cannula cap connected to the proximal end of said cannula, said cannula cap comprising
• a cap body comprising an end portion having a bore therethrough defining an instrument receiving passageway, said cap body having a series of transverse ribs on an exterior thereof;
• and
• a monolithic flapper valve positioned adjacent said cap body and comprising a flapper portion, a flapper mounting portion positioned adjacent said cap body, and an integrally formed hinge portion connecting said flapper mounting portion to said flapper portion for permitting said flapper portion to move to an open position when an instrument is positioned within the instrument receiving passageway and for biasing said flapper portion toward a closed position when an instrument is removed from said instrument receiving passageway, said hinge having a plurality of spaced apart straps extending between said flapper mounting portion and said flapper portion.