Low profile venous access port assembly

摘要

A venous access port assembly having a housing base with a discharge stem, a septum, and a cap. An interior reservoir is defined by a well in the housing base and the bottom surface of the septum, and a passageway extends from the reservoir through the discharge stem. The cap is secured to the housing base and securely retains the septum in the assembly, compressing an annular flange of the septum against a septum seat of the housing base. Horizontal ribs on the interior of the cap snap into complementary grooves on the side wall of the housing base to mechanically lock together the cap and housing base during curing of the solvent bonding agent. The cap is mechanically secured and bonded to the housing base. Crush ribs on the interior surface of the cap, precisely center the cap about the housing base during assembly and compensating for manufacturing tolerances.

主权项

1. A venous access port assembly, comprising:
a needle-penetrable septum comprising a flange having a circumference; a housing comprising a housing base comprising an uppermost surface that is a septum seat onto which the septum is seated, the housing base further comprising a side wall comprising an exterior surface and a first retention section disposed circumferentially around a portion of the exterior surface; a discharge port secured to the housing base, wherein a longitudinal port axis extends through the discharge port; and a cap securable to the housing base for retaining the septum securely in the assembly, the cap comprising a side wall and an interior cavity, wherein an inwardly facing surface of the cap is associated and in contact with the exterior surface of the side wall of the housing base and the circumference of the flange of the septum, the cap further comprising a top portion extending radially inwardly to cover the flange of the septum, the cap further comprising a second retention section disposed circumferentially around a portion of the inwardly facing surface, the second retention section being associated with the first retention section and complementary thereto such that the first and second retention sections snap fit together to assure mechanical joining of the cap to the housing base thereby securing the septum in the housing, wherein one of the housing base and the cap further comprises a plurality of angularly spaced vertical crush ribs on a surface thereof to be engaged by a surface of the other of the housing base and the cap for centering the housing base and the cap, wherein one of the first and second retention sections comprises at least one retention rib and the other thereof comprises a complementary at least one retention groove, wherein the at least one retention rib comprises two separate coplanar portions spaced apart from each other, each extending circumferentially an angular distance between about 60° to about 100°, and wherein the at least one retention groove comprises two separate coplanar portions spaced apart from each other, each extending circumferentially an angular distance about 70° to about 110° and extending an angular distance greater than of the two separate coplanar portions of the at least one retention rib.