Methods, devices, and kits for creating bloodstream access in patients are provided which include or use a vessel wall traversing device which can be shaped like a blunt-ended nail with a hollow shank and a head of a larger diameter than the shank is inserted in the puncture hole blunt end first such that the shank traverses the puncture hole with the blunt end being positioned exterior to the outer surface of the vessel and the head of the device abutting the inner surface of the vessel at the puncture hole.
