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HelpTest Code LAB2070 Tricyclic Antidepressants (TCA) Total Qualitative
Collection:
Specimen: Blood
Container: Green Lithium Heparin with gel, Serum Separator or Plain Red tube.
Volume: 5 mL; Minimum 1 mL
Pediatric Collection:
One Green, Gold or Red microtainer filled to 600 uL.
Stability:
Once serum/plasma is separated from cells:
Ambient: 8 Hours
Refrigerated (preferred): 1 Week
Frozen: 2 Weeks
Turn Around Time (TAT):
STAT: 1 HOUR
Routine: 4 HOURS
Test Availability:
24 hours a day / 7 days a week
Interpretive Data:
NEGATIVE: TCA < 300 ng/mL
POSITIVE: TCA > 300 ng/mL
A false positive TCA result may occur if the six compounds listed below present in amounts indicated in parentheses: chlorpromazine (200 ng/mL), cyclobenzaprine (200 ng/mL); thioridazine (1.5 mcg/mL); diphenhydramine (12 mcg/mL); orphenadrine citrate (6 mcg/mL); cyproheptadine (0.42 mcg/mL). Other substance and or factors not listed may interfere with the test and cause false results.
Additional Test Codes
TCA
Performing Laboratory Section
Chemistry / UMC MAIN LABORATORY