An access needle assembly for use with implanted hemodialysis access ports is disclosed. In some embodiments, the assembly includes the following: a tubular needle having an internal cavity including an open leading end having a beveled edge and an open trailing end opposite the leading end, the cavity including a side outflow opening adjacent the trailing end an obturator configured to be removably positioned within the tubular needle an interface portion including a central cavity so that the interface portion is positioned adjacent the opening, the interface including a flanged portion extending substantially perpendicular from the central cavity and positioned concentrically over the opening a conduit portion fluidly connected with the cavity via the flanged portion and a depth block joined with the interface portion below the flanged portion, the depth block including a lower end opposite the interface portion.
