Abstract: Blood sampling apparatus operative to selectively and removably interconnect a blood sample container with an extracorporeal blood conduit and including a blood interface assembly adapted to securely and removably puncture both said blood conduit and said blood sample container, the blood interface assembly comprising an elongate housing, a needle mount removably mounted in said elongate housing, a double pointed needle fixedly adhesively mounted in said needle mount so as to have portions extending outward of said needle mount in opposite directions and a puncturable resilient sheath formed over at least one portion of said needle and onto at least a portion of said needle mount.