Patent ID: 7670322

Claim:
A Y-site connector comprising: a common lumen and a secondary lumen, the lumens extending along a main axis of the connector and the secondary lumen including a first end; a main lumen intersecting the common lumen or the secondary lumen and a substantially open passageway extending between the common lumen and secondary lumen before fluid flow is initiated between the common and secondary lumens; and a check valve comprising: a fixation portion engaging at least a portion of an internal wall of the secondary or common lumens of the Y-site connector between the first end of the secondary lumen and the intersection of the secondary or common lumen with the main lumen; a flap member extending axially away from the fixation portion along a portion of the internal wall of the common lumen and overlying a hole joining the main lumen to the common lumen, wherein the flap member is resiliently biased toward a sealing position to minimize or prevent fluid flow in a direction from the common lumen to the main lumen and the flap member extends around less than the entire perimeter of the inner wall of the common lumen so as to facilitate movement of the flap member and so as to permit fluid flow from the secondary lumen to the common lumen in a fully opened position away from the sealing position, wherein a portion of the inner wall of the common lumen includes a substantially planar portion adjacent to the hole joining the main lumen to the common lumen, and wherein at least a portion of the flap member is substantially planar.