Patent ID: 7892216

Claim:
A base of an infusion set comprising: A substantially planar member having upper and lower sides; an adhesive layer attached to the lower side of the planar member; a base cannula attached to the substantially planar member and extending downwardly below the lower side; and a port in fluid communication with the base cannula, the port comprising: an elastomeric septum positioned such that at least a portion of the septum is at or near an opening in the port, the septum being configured for repeated connection and disconnection with a fluid source, and the septum being adapted to inhibit fluid communication through the port, and a funnel-shaped surface disposed between the septum and base cannula, wherein the septum has a central region, an upper portion positioned above a bottom surface of the central region, and a lower portion comprising a flange that extends radially outwardly beyond the upper portion and extends downwardly below the bottom surface of the central region, wherein the lower portion is configured to rest against the funnel-shaped surface, thereby supporting the septum and resisting downward shear when a downward force acts against the septum.