Correlation of Venous Blood Gas and Pulse Oximetry With Arterial Blood Gas in the Undifferentiated Critically Ill Patient

Abstract

In this population of undifferentiated critically ill patients, pH and pCO₂ on VBG analysis correlated with pH and pCO₂ on ABG analysis. The SpO₂ correlated well with pO₂ on ABG analysis. The combination of VBG analysis plus SpO₂ provided accurate information on acid-base, ventilation, and oxygenation status for undifferentiated critically ill patients in the ED and ICU.