Patent ID: 7351233

Claim:
An implantable vascular access port, comprising: a main port body having a hollow internal chamber formed therein with a curved floor at the base of the internal chamber, said main port body having an outlet formed in a side wall thereof in communication with the internal chamber, wherein the internal chamber has a proximal portion near the outlet and a distal portion opposite the outlet; a septum covering a surface of the main port body and formed from a flexibly resilient material; and a hollow outlet tube attached to the main port body and in fluid communication with the outlet thereof; wherein the main port body is configured such that when viewed in a cross-section taken along a central vertical plane, the distal portion of the internal chamber has a concavely curved inner surface which slopes gradually downwardly below the septum and which merges smoothly and seamlessly with the curved floor, and the proximal portion has an inner surface which extends toward the outlet, such that the internal chamber of the access port is formed in an asymmetric curved conical shape directed substantially toward the outlet, such that during a medical procedure, when a tip portion of a hollow needle is inserted through the septum, and a guide wire is fed through the needle and into the internal chamber, the shape of the internal chamber passively guides the guide wire toward the outlet.