Patent ID: 7329249

Claim:
A medical connector having a longitudinal axis and comprising: interconnected axially aligned relatively rotatable parts forming a housing with a fluid flow passageway in said housing, said parts being configured for connection to external male and female Luer flowline connectors; a compressible seal in said housing having a flow passageway extending from an axially aligned end to an axially offset end whereby relative rotation of said parts opens and closes a fluid flow path through said connector and said seal including a retrograde flow preventer positioned in said fluid flow path, said seal and said retrograde flow preventer being formed as a single piece and said retrograde flow preventer projecting toward a male end of said male Luer connector, said preventer having a resilient portion with a normally closed fluid conducting perforation in said resilient portion which opens at fluid delivery pressures exerted on an interior surface of said resilient portion and which remains closed at patient vascular pressures exerted on an exterior surface of said resilient portion.