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.
An example of limited visibility that led to the development of operational definitions in this study. The green arrow on the patient's left shows a faintly visible peritoneal fascial plane, which defines the bowel bag boundary. On the patient's right, the fascial plan is not visible, which requires the use of an operational definitions.
