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VBG vs ABG

Notes: In a meta-analysis, Bloom et al. note that there is good correlation between arterial and venous pH and HCO3. They also concluded that despite variability in arterial and venous pCO2 and lactate, normal venous levels have good negative predictive values. 1 Zeserson et al. studied VBG and SaO2 (pulse oximetery) results in critically ill patients. This population included 41% ED,

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