Intragastric pH and upper gastrointestinal bleeding in the ICU.
Karlstadt
R G
RG
Hedrich
D A
DA
D006471:Gastrointestinal Hemorrhage; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007362:Intensive Care Units; D008991:Monitoring, Physiologic / Q000379:methods; D013270:Stomach / Q000502:physiology