| CPC A61M 39/0613 (2013.01) [A61M 39/0247 (2013.01); A61M 39/225 (2013.01); A61M 2039/027 (2013.01); A61M 2039/064 (2013.01); A61M 2039/066 (2013.01); A61M 2039/1072 (2013.01)] | 24 Claims |
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1. A medical valve comprising:
a housing comprising a sidewall and defining a chamber;
a connection interface in fluid communication with the chamber, the connection interface being configured to couple with one or more medical devices for infusion of fluid through the medical valve in a distal direction and aspiration of fluid through the medical valve in a proximal direction;
a septum coupled to the housing, the septum comprising a proximal surface, a distal surface, and a selectively openable closure that extends through a full thickness of the septum between the proximal surface and the distal surface, wherein the closure is positioned within the chamber; and
a plurality of projections that extend away from the sidewall, each projection comprising a restriction surface at a distal end thereof that is configured to contact the proximal surface of the septum to oppose movement of a restricted portion of the septum in the proximal direction such that an aspiration cracking pressure required to open the closure to permit fluid flow through the septum in the proximal direction exceeds an infusion cracking pressure required to open the closure to permit fluid flow through the septum in the distal direction,
wherein the proximal surface of the septum further comprises contact regions at which the septum is configured to contact the restriction surfaces of the plurality of projections,
wherein the restricted portion of the septum defines an area that comprises the contact regions, and
wherein a collective total area of the contact regions of the septum is smaller than the area of the restricted portion of the septum.
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