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.
VD/VT of the acute respiratory distress syndrome swine model under different conditions. *P<0.05 vs. pre-injury; †P<0.05 vs. injury. VD/VT, ratio of dead space volume to tidal volume (dead space fraction); PEEP, positive end-expiratory pressure; Po, optimal PEEP; -n, n cm Hg below Po; +n; n cm Hg above Po.
