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HelpTest ID FINHP Isoniazid, Serum/Plasma
Method Name
High Performance Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Reporting Name
Isoniazid, Serum/PlasmaSpecimen Type
VariesSubmit only 1 of the following specimens:
Serum
Draw blood in a plain, red-top tube(s), serum gel tube is not acceptable. Spin down and send 1 mL of serum frozen in plastic vial.
Plasma
Draw blood in a lavender-top or pink-top (EDTA) tube(s), plasma gel tube is not acceptable. Spin down and send 1 mL of EDTA plasma frozen in plastic vial.
Specimen Minimum Volume
0.4 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Varies | Frozen | 120 days |
Reference Values
Usual therapeutic range in the treatment of tuberculosis: 1 - 7 mcg/mL. Toxic symptoms present at approximately 20 mcg/mL and greater.
Isoniazid is known to have limited stability in biological specimens which may be concentration and storage condition dependent. Negative or lower than expected results should be interpreted with caution.
Day(s) Performed
Tuesday
Report Available
4 daysPerforming Laboratory
NMS LabsCPT Code Information
80375