Patent ID: 8377014

Claim:
Implantable medical device for injecting and/or removing a fluid substance into and/or from a human or animal organism, said device comprising a casing whose wall demarcates a chamber designed to receive said fluid substance, the wall of the casing being pierced with at least one first access orifice positioned to enable a needle designed for injecting or removing the fluid substance into or from the chamber to go through said wall by crossing said first access orifice, wherein the first access orifice has a staged structure comprising: a guiding portion designed to limit the angular play of the needle when said needle is engaged therein, around a predetermined reference direction of penetration oriented towards the chamber so that the maximum angular divergence between the direction of the engaged needle and the reference direction of penetration is smaller than or equal to 35°, a flared intake portion that extends the guiding portion and opens on to the external surface of the wall so that it can make the path of the incident needle converge towards the guiding portion and enable the engagement of said needle in said guiding portion.