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Item Value
Approval req'd? No
Available Stat? No
Test code CYAN
Performed by Quest
Sendout? Yes
Method Colorimetric
Container type Dark Green top (Sodium Heparin)
Amount to Collect 10 mL blood
Sample type Heparinized whole blood
Preferred volume 10 mL blood
Min. Volume 1 mL blood
Processing notes Refrigerate. Do NOT centrifuge or open tube. Order Quest # 400
Units mg/L
Normal range
Normal < 0.1 mg/L
Potentially toxic > 0.5 mg/L
Critical value Quest Priority-1: ≥ 1.0 mg/L
Quest Priority-2: 0.5-0.9 mg/L
Synonyms Hydrogen cyanide; Cn; Hydrocyanic acid; Prussic acid
Stability Room temperature 2 weeks, refrigerated 2 weeks, frozen at -20C 1 month.
Turn around times Test run Monday, Wednesday, Friday. Turnaround time: 4-6 days
Additional information The detection limit of this assay is 0.1 mg/L

Toxic syndromes are rapid and include flushing, headache, dizziness, and tachypnea that may progress to respiratory depression and death.

80% of cyanide is converted to thiocyanate. Administration of sodium nitroprusside contributes to the total body pool of cyanide and complicates interpretation.
CPT coding 82600-90
LOINC code 5634-1
Last Updated 10/20/2011 3:16:59 PM
Entry Number 282
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