top of page

Arterial Blood Gas

Ordering Info & Methodology

Test Code

Cerner Synonyms


Arterial BGAS, ABG, Arterial Blood Gas, ABG, blood gas, Arterial Blood Gas, po2, pH, oxygen saturation, pco2, bicarbonate,

Turn Around Time


Available on a STAT basis.

Radiometer ABL800

Ordering Guide

Specimen Requirements

Sample Type

Collection Container

Alternate Collection Containers

Whole Blood

Heparinized Syringe

Heparinized Capillary

1 mL

Add on stability
This is the length of time after sample collection that this analyte is stable. Test can be added to a previously collected sample if the time since collection is less than the add on stability time.

Minimum Volume

Add On Stability

Collection and Shipping Requirements

Reference Intervals

Female Reference Interval

Age Category
Reference Interval

Male Reference Interval

Age Category
Reference Interval
Additional Notes

[object Object]

Measurement Uncertainty (MU)
Every laboratory value is an estimate of the true concentration of substance. MU is the 95% confidence interval around that estimate. 95% of the time, the true concentration will be within the range of the reported value ±MU. This value is based on analytical variability (precision) and does not reflect other factors such as sample collection and handling which may also affect the result.


Reported sodium = 140 mmol/L
Sodium MU = 1%
Expanded uncertainty = 140 mmol/L ± 1% or 140mmol/L ± 1.4 mmol/L
Interpretation - the true value of sodium in the sample is in the range 138.6-141.4 mmol/L, with 95% confidence.

Measurement Uncertainty

In the presence of dyshemoglobins the reported oxygen saturation overestimates the fraction of oxyhemoglobin in total blood hemoglobin.   

Heavy smokers may show up to 0.10 of Hb as carboxyhemoglobin.    

Elevated carboxyhemoglobin or methemoglobin is automatically reported on any blood gas order, if that hemoglobin species is present.   

Hydroxycobalamin, given to smoke exposure victims, results in a marked negative bias in carboxyhemoglobin and a marked positive bias in methemoglobin.

This lactate method has a positive interference with glycolic acid, the major metabolite of ethlyene glycol. To confirm an elevated lactate, order a plasma lactate (LACT).

bottom of page