Test Overview
Method
Spectrophotometry
Specimen
Specimen Type
Preferred: Serum (red top, no gel)
Alternate: Sodium Heparin (dark green top, no gel)
Volume
Sample Volume
1.0 mL
Minimum Volume
100 μL
Collection & Handling
Collection Instructions
Optimum sampling time: samples should not be taken until after 48hr of 1.V. therapy with nitroprusside has been completed in high-risk patients.
Handling Information
Separate, store and send cold or frozen.
Stability
| Refrigerated | Frozen |
|---|---|
| 7 days | >7 days |
Performance & Interpretation
Turnaround Time
3 days
Referral Location
Canada
Interface & Setup
HL7 Interface Codes
| Order Code | Result Name | Result Codes | Units |
|---|---|---|---|
| THCYN S | THIOCYANATE | 66347 | mmol/L |
Test Version
Last Updated
2026-07-22