Liquid Chromatography with Tandem Mass Spectrometry (LC/MS-MS)
Monitoring possible exposure to cyanide; establishing cause of death in cyanide exposure.
Normal: Up to 0.05 mcg/mL
Potentially toxic: 0.50 mcg/mL and greater
Potentially lethal: 2.0 mcg/mL and greater
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Not useful for monitoring nitroprusside therapy; the Thiocyanante assay is the preferred test for monitoring nitroprusside therapy.
Days Test Performed
7 - 11 days
Soft Order Code
Mayo FCYNB (NMS 1380B)
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Offsite Collection Instructions
Collect blood in a gray top tube. Send intact whole blood FROZEN.
2 mL whole blood
0.5 mL whole blood
Test sent to Mayo Medical Laboratories; performed by NMS Labs.