In this population of undifferentiated critically ill patients, pH and pCO 2 on VBG analysis correlated with pH and pCO 2 on ABG analysis.
The SpO 2 correlated well with PaO 2 (the partial pressure of oxygen in arterial blood) as predicted by the standard oxygen-hemoglobin dissociation curve. The mean difference for pCO 2 between VBG and ABG was 4.8 mm Hg (95% confidence interval: 3.7-6.0 mm Hg) with a Pearson correlation of 0.93. The mean difference for pH between VBG and ABG was 0.03 (95% confidence interval: 0.03-0.04) with a Pearson correlation of 0.94. Of the patients completing the study, 53 (41.1%) were in the ED, 41 (31.8%) were in the medical ICU, and 35 (27.1%) were in the surgical ICU. There were 156 patients enrolled, and 129 patients completed the study. Statistical analysis of VBG, SpO 2, and ABG data was done using paired t test, Pearson χ 2, and Pearson correlation. Patients were eligible for enrollment if the treating physician ordered an ABG. We performed a prospective cohort study of patients in the emergency department (ED) and intensive care unit (ICU) at a single academic tertiary referral center.
#Vbag medical plus
The purpose of this study was to evaluate the correlation of VBG analysis plus pulse oximetry (SpO 2) with ABG analysis. Although arterial blood gas (ABG) analysis remains the gold standard, venous blood gas (VBG) analysis has been shown to correlate with ABG analysis and has been proposed as a safer less invasive alternative to ABG analysis. Blood gas analysis is often used to assess acid-base, ventilation, and oxygenation status in critically ill patients.