Septum Feature for Identification of an Access Port

Abstract

A power-injectable access port, and a method of identifying a subcutaneously implanted power-injectable access port. The power-injectable access port includes a body capturing a septum that covers a cavity defined by the body, and a pattern of protrusions extending from an outer surface of the septum away from the cavity, the pattern of protrusions detectable through palpation to identify the access port as a power-injectable access port.

What is claimed is: 
     
         1 . A power-injectable access port, comprising:
 a body capturing a septum that covers a cavity defined by the body; and   a pattern of protrusions extending from an outer surface of the septum away from the cavity, the pattern of protrusions detectable through palpation to identify the access port as a power-injectable access port.   
     
     
         2 . A power-injectable access port according to  claim 1 , wherein the pattern of protrusions comprises three substantially identical protrusions. 
     
     
         3 . A power-injectable access port according to  claim 2 , wherein the three substantially identical protrusions are positioned substantially equidistantly from a central axis of the septum in a triangular pattern. 
     
     
         4 . A power-injectable access port according to  claim 1 , wherein the pattern of protrusions comprises protrusions that are elongated and extend linearly or arcuately. 
     
     
         5 . A power-injectable access port according to  claim 4 , wherein the elongated protrusions form a plurality of substantially linear ridges. 
     
     
         6 . A power-injectable access port according to  claim 5 , wherein the substantially linear ridges are parallel to each other. 
     
     
         7 . A power-injectable access port according to  claim 6 , wherein the parallel substantially linear ridges are formed equidistant from a central axis. 
     
     
         8 . A power-injectable access port according to  claim 4 , wherein the elongated protrusions intersect substantially near the center of the septum and extend at least partially toward a periphery thereof. 
     
     
         9 . A power-injectable access port according to  claim 8 , wherein the elongated protrusions extend to the periphery of the septum. 
     
     
         10 . A power-injectable access port according to  claim 4 , wherein the elongated protrusions form a pattern of intersecting lines. 
     
     
         11 . A power-injectable access port according to  claim 1 , wherein the protrusions comprise frustoconical circumferential sides and a flat top surface. 
     
     
         12 . A power-injectable access port according to  claim 1 , further comprising at least one recess extending into the outer surface of the septum. 
     
     
         13 . A power-injectable access port according to  claim 12 , further comprising three recesses extending into the outer surface of the septum positioned substantially equidistant from the central axis of the septum. 
     
     
         14 . A power-injectable access port according to  claim 1 , further comprising a plurality of recesses on the outer surface of the septum extending into the septum. 
     
     
         15 . A power-injectable access port according to  claim 14 , wherein the plurality of recesses and the pattern of projections are positioned equidistant from an axis of the access port, such that an elongated recess is separated from an adjacent elongated recess by a projection. 
     
     
         16 . A power-injectable access port according to  claim 15 , wherein the recesses and the projections are curved to create a generally circular pattern. 
     
     
         17 . A power-injectable access port according to  claim 1 , wherein each of the protrusions includes a surface remote from the outer surface of the septum that is rounded. 
     
     
         18 . A power-injectable access port according to  claim 1 , wherein a side periphery of the access port is generally triangular. 
     
     
         19 . A method of identifying a subcutaneously implanted power-injectable access port, comprising:
 providing a power-injectable access port including a septum having a pattern of protrusions extending from an outer surface thereof, the pattern of protrusions detectable through palpation to identify the access port as a power-injectable port;   detecting the protrusions through palpation; and   identifying the access port as a power-injectable port.