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Test Code ISONIAZID Isoniazid, Serum/Plasma

Method Name

High Performance Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Reporting Name

Isoniazid, Serum/Plasma

Specimen Type

Varies


Specimen Required


Submit 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

Reject Due To

Hemolysis

NA

Thawing

Warm reject; Cold reject

Lipemia

NA

Icterus

NA

Other

NA

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) and Time(s) Performed

Tuesday

Performing Laboratory

NMS Labs

CPT Code Information

80375

LOINC Code Information

Test ID Test Order Name Order LOINC Value
FINHP Isoniazid, Serum/Plasma 3697-0

 

Result ID Test Result Name Result LOINC Value
Z4533 Isoniazid 3697-0
Z4534 Reporting Limit 19147-8