A needle or cannula set especially adapted to access an implanted drug delivery portal includes a rigid base having a flat undersurface and a low profile. The base supports one end of a needle so that the needle projects from the base perpendicular to the base undersurface. One end of a flexible tube...http://www.google.fr/patents/US4743231?utm_source=gb-gplus-shareBrevet US4743231 - Drug administration needle unit
