Oxygen and Carbon Dioxide Exchange
PaO2- Partial pressure oxygen: 60-90 mm Hg
PaCO2- Partial pressure carbon dioxide: 36-44 mmHg
pH -normal 7.35-7.45
HCO3- 22-26 meq/L: Calculated from the Henderson-Hasselbach equation.
Sample is obtained from an artery using a "blood gas" syringe coated with heparin.
All air bubbles are removed and a cap placed on syringe.
Best if run within 15 minutes.
Place on ice if it will be longer than 15 minutes.