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.
Length of break in the 20 and 30 mm Hg isobaric contours vs. completeness of bolus clearance. Red triangles indicate complete clearance, whereas blue triangles denote incomplete clearance. A clear cutoff exists at 2 cm for the 20 mm Hg isobaric contour and at 3 cm for the 30 mm Hg isobaric contour above which there was uniform failure of clearance.
