Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(A) Cannula approaching a fairly fixed point of vascular bifurcation. (B) Cannula piercing vascular bifurcation, entering vessel, and staying intravascular. (C) Cannula moving freely within the vessel, which may leave the practitioner unaware of its placement. (D) Needle entering vascular bifurcation. (E) Unlike the cannula, a needle is likely with movement to exit the vessel.
