Figure 2.
Observation of esophageal varices using a thin probe (20 MHz UMP, Olympus Co., Tokyo, Japan). Even narrow blood vessels can be observed.
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.