Synonym(s):
3 mL blood in heparinised sealed syringe immersed in crushed ice.
Keep cold with ice and send immediately to the laboratory.
Co-oximetry
From 0 day Non-smokers: <1.5 % total Hb Smokers (1-2 packs/day): 1.5 - 4.9 % Heavy smokers (>2 packs/day): 5.0 - 9.0 % Toxic: >20 %
Mean = 4 hrs, Range: 3 – 5 hrs
Daily, 24-h STAT
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