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Cooximetry

Item Value
Approval req'd? No
Available Stat? No
Test code COOX
Performed by Neonatal Clinical Physiology Laboratory
In House Availability Test available 24 hours per day 7 days per week
Method Radiometer ABL 800
Collection Instructions Heparin syringes and caps to replace the needles during transport to the laboratory are available from Materiel Services or the phlebotomy stations

Specimens should be sent at ambient temperature via pneumatic tube to Neonatal Clinical Physiology Lab, station #916 within 30 minutes of collection.
Container type Plastic syringe containing 100 U of dry heparin
Amount to Collect 1 mL blood
Sample type Heparinized whole blood (Blood gas syringe only)
Preferred volume 1 mL blood
Min. Volume 0.5 mL blood
UCSF Rejection Criteria Samples submitted > 30 min. after collection. Samples with needle attached, containing large bubbles, unlabeled, mislabeled, clotted or of insufficient volume for testing.
Units %
Normal range
Hemoglobin see Hemoglobin entry
Oxyhemoglobin 93-100%
Carboxyhemoglobin 0.5-1.5%
Methemoglobin 0.0-1.5%
Oxygen saturation 95-99%
Art. O2 content: 16-22 vol%
A-V DO2 3.5-5 vol%
A-a DO2 varies with FiO2
Critical value
Carboxyhemoglobin ≥ 5%
Methemoglobin ≥ 2%
Synonyms Hemoximetry; Methemoglobinemia; Oxyhemoglobin; Carboxyhemoglobin; Deoxyhemoglobin
Turn around times 15 minutes
Additional information Testing is performed by the Neonatal Clinical Physiology Lab, M1577. Heparin
syringes and caps to replace the needles during transport to the laboratory are available from Materiel Services or the phlebotomy stations.
LOINC code 11559-2
Last Updated 3/14/2013 1:39:31 PM
Entry Number 469
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