Pressure activated valve for high flow rate and pressure venous access applications

A device comprising:

• a first housing comprising a first housing lumen, a first housing protrusion, and a first housing relief well;
• wherein the first housing relief well is positioned radially outward relative to the first housing protrusion;
• a second housing comprising a second housing protrusion and a second housing relief well;
• wherein the second housing relief well is positioned radially outward relative to the second housing protrusion;
• a flexible disk comprising at least one slit and a periphery radially outward from the at least one slit;
• wherein the first housing protrusion extends continuously around the first housing lumen;
• wherein either the first housing relief well or the second housing relief well accommodate movement of the periphery of the flexible disk as a result of fluid flow through the at least one slit between the first housing lumen and the second housing lumen;
• and
• wherein the first housing relief well substantially aligns with the second housing relief well.

A device comprising:

• a first housing comprising a first housing protrusion, a first housing lumen, and a first housing relief well;
• wherein the first housing relief well is positioned radially outward relative to the first housing lumen and the first housing protrusion;
• a second housing comprising a second housing protrusion, a second housing surface, a second housing lumen, and a second housing relief well;
• wherein the second housing relief well is positioned radially outward relative to the second housing lumen and the second housing protrusion;
• a flexible disk having a central slit and an annular end extending about a periphery of the flexible disk, wherein the central slit is configured to allow fluid flow between the first and second lumens, and wherein the annular end is configured to flex or deform within at least one of the first or second relief wells in response to fluid flow through the central slit between the first and second lumens.