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Mirtazapine, serum or plasma-994

Test info

Test name:

Mirtazapine, serum or plasma

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Alternate names:

Remeron

Useful for:

Therapeutic drug management

Specimen

Specimen type:

Serum

Collection container:

Red serum vial/tube, 5 mL

Volume:

2.0 mL

Minimum volume:

0.5 mL

Collection instructions:

Draw just before the next dose

Processing instructions:

Allow sample to clot
Spin within two (2) hours of sample collection
Transfer serum to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as serum

Transport container:

Transfer vial/tube with cap - 12mL (LabCorp)

Alternate specimen type:

Heparin plasma

Alternate collection container:

Dk green heparin (Li or Na), no gel

Alternate collection instructions:

Immediately after collection, mix tube thoroughly by gentle inversion, 8 - 10 times, to prevent clotting

Alternate processing instructions:

Spin within two (2) hours of sample collection
Transfer plasma to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as the appropriate plasma type

Transport and stability:

Ambient - < 3 days

Refrigerated (OK)

Frozen (OK)

Reason for rejection:

Gel-barrier tubes

Performance

Performing lab:

LabCorp Burlington (808414): R-NX

Days set up:

Tu, Th, Sat

TAT:

10 - 14 days

Method:

High-pressure liquid chromatography with fluorescence detection (HPLC/FD)

Clinical and Interpretive info

Reference ranges:

Expected steady-state trough Mirtazapine concentrations in patients receiving recommended daily dosages: 4.0 - 40.0 ng/mL

Clinical information:

Trough levels are most reproducible

Billing

CPT codes:

80335

LOINC code:

Result 17283-3

Tracking

Date created:

08/19/2019

Revised date:

03/11/2022

Review date:

12/27/2023