Test directory: i-STAT Blood Gas, Venous

Ordering Code 8525
Test Name i-STAT Blood Gas, Venous
Preferred Specimen Venous Whole Blood
Preferred Container Heparinized Syringe, Lithium Heparin tube
Collection Instructions Heparinized Syringe: Avoid contamination by air, immediately remove all air bubbles from the syringe after drawing the sample
Lithium Heparin tube: Draw full tube.
Handling Instructions Test sample immediately.
Specimen Stability 3 Minutes
Rejection Criteria Clotted, Specimen older than stability limits
Avail. Stat NO
Methodology Potentiometry for pH and pCO2, Amperometric for pO2
Reference Lab  QMC West Decentralized Testing

Reference range(s)

The reference ranges listed below are valid on this date of March 14, 2026.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Source ALL See report.
Temp (Pt) ALL F See report.
FIO2 ALL % See report.
Route ALL See report.
Mode ALL See report.
Set Rate ALL Br/min. See report.
PEEP/CPAP/EPAP ALL cmH2O See report.
VT ALL mL See report.
Press. Support/IPAP ALL cmH2O See report.
Insp. Pressure ALL cmH2O See report.
O2 Liter Flow ALL LPM See report.
pO2/FIO2 Ratio ALL See report.
pH, Venous ALL 7.31-7.41 <= 7.20 >= 7.55 7.31-7.41 >= 7.55 <= 7.20
pCO2, Venous ALL 41-51 <= 20 >= 70 41-51 >= 70 <= 20 mmHg
pO2, Venous ALL mmHg See report.
Base Excess, Venous ALL (-2)-(3) (-2)-(3) mmol/L
Bicarbonate, Venous ALL 23-28 23-28 mmol/L
O2 Sat (Calc), Venous ALL % See report.