The pco2 values of arterial and capillary blood gases were found to be highly correlated r2 0 9534 p 0 0001. In abg the normal readings should include a pao2 pressure of oxygen content of 80 100mmhg paco2 pressure exerted by carbon dioxide of 35 45mmhg.
Abg s vs vbg s in the emergency department.
Abg vs vbg normal values chart. Arterial and venous blood gas pco2 values had less correlation r2 0 5917 p 0 011. Values such as ph pco2 pao2 hco3 and base excess obtained via abg are considered the gold standard. Vbg can be used to guide management in preference to abg ma et al 2003 vbg correlated with abg well.
Here are other differences. This relationship appears to hold true even in shock states and in a severe metabolic acidosis such as diabetic ketoacidosis. Kelly 2001 razi 2012 brandenburg 1998 mccanny 2012 byrne 2014.
Central venous oxygen saturation scvo2 monitoring mixed venous oxygen saturation svo2 and svo2 vs scvo2. They also concluded that despite variability in arterial and venous pco2 and lactate normal venous levels have good negative predictive values. Arterial blood gases abg s blood sample taken directly from an artery used to gauge the metabolic environment oxygenation and ventilation status.
There is a significant difference in the readings presented. Studied vbg and sao2 pulse oximetery results in critically ill patients. In vbg pao2 is about 40 30mmhg and the paco2 is about 41 51mmhg.
The average vbg ph is 0 03 0 04 less than the abg ph values. Note that there is good correlation between arterial and venous ph and hco3. Mean difference in ph 0 015 0 006 units 95 ci.
The capillary blood gas accurately reflected the arterial pco2 in 41 82 patients. In a meta analysis bloom et al.