Patent ID: 8029471

Claim:
An access device comprising: (a) a cylindrical cannulation assembly, said cylindrical cannulation assembly comprising a cannulation cylinder comprising an insertion point at a first end; (b) a cylindrical conduit assembly, said cylindrical conduit assembly comprising a cylindrical conduit and at least one alignment sleeve section to facilitate alignment of said cylindrical conduit within said cannulation cylinder and the easy sliding engagement of said cylindrical conduit within said cannulation cylinder, wherein at least one of said at least one alignment sleeve sections comprises an alignment sleeve section vent to vent air trapped in enclosed spaces between said cylindrical conduit assembly and cylindrical cannulation assembly, said cylindrical conduit telescopically positioned within said cannulation cylinder such that, (1) at a first position (to be used before and during cannulation), a first end of said cylindrical conduit, said first end being a substantially smooth right circular cylinder, is positioned a rearward distance from said insertion point to facilitate cannulation, and, (2) at a second position (to be used after cannulation), said first end of said cylindrical conduit is positioned within said cannulation cylinder substantially at or forward of said insertion point; and (c) a locking mechanism to secure the position of said cylindrical conduit relative to said cannulation cylinder at either said first position or said second position.