FMETF - Specimen: Metformin, Serum/Plasma

Test Catalog

Test ID: FMETF    
Metformin,  Serum/Plasma

Specimen Type Describes the specimen type needed for testing


Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Submit only one of the following specimens:


Draw blood in a plain, red-top tube(s). (Serum gel tube is not acceptable.) Spin down and send 1 mL of serum refrigerate in a plastic vial (preservative free).



Draw blood in a lavender-top (EDTA) tube(s) or Pink top tube. (Plasma gel tube is not acceptable.) Spin down and send 1 mL of plasma refrigerate in a plastic vial (preservative free).


Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

0.3 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected




Warm OK; Cold OK







Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
VariesRefrigerated (preferred)30 days
 Frozen 365 days
 Ambient 30 days
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