Clinics and Departments

Laboratory Services

Lab Dept:

Chemistry

Test Name:

THIOCYANATE LEVEL

General Information

Lab Order Codes:

THI

Synonyms:

Nitroprusside metabolite

CPT Codes:

84430 - Thiocyanate

Test Includes:

Thiocyanate level reported in mg/dL.

Logistics

Test Indications:

Useful for evaluating nitroprusside therapy.

Lab Testing Sections:

Chemistry - Sendouts

Referred to:

MedTox Laboratories (MedTox Test:118)

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

1 day

Special Instructions:

Levels should be considered daily for the duration of prolonged nitroprusside therapy.

Specimen

Specimen Type:

Blood

Container:

Green top (Li Heparin) or Red top tube

Draw Volume:

3 mL (Minimum: 0.6 mL) blood

Processed Volume:

1 mL (Minimum: 0.2 mL) serum/plasma

Note: Submission of the minimum volume results in an elevated reporting range and inability to repeat analysis.

Collection:

Routine venipuncture

Special Processing:

Lab Staff: Centrifuge specimen, remove serum/plasma aliquot from cells as soon as possible. Aliquot should be stored in a screw-capped round bottom plastic vial. Ship and store at refrigerated temperatures. Forward promptly.

Patient Preparation:

None

Sample Rejection:

Mislabeled or unlabeled specimens

Interpretive

Reference Range:

N/A

Critical Values:

10.0 mg/dL

Thiocyanate is a toxic metabolite formed during the administration of nitroprusside.

Limitations:

Reporting limit: 0.5 mg/dL

Methodology:

Spectrophotometry (SPEC)

References:

MedTox Laboratories July 2006



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