Specimen:

Serum or Plasma

Collection Medium:

Alternate
Collection Media:

Lavender top tube (EDTA), Pink top tube (EDTA sprayed)

Minimum:

Adult  preferred minimum:  1 mL serum or plasma
Adult absolute minimum:  0.4 mL serum or plasma
Pediatric minimum:  0.3 mL serum or plasma

Rejection Criteria:

Heparinized plasma or I.V. fluid; specimens collected in potassium 
oxalate/sodium fluoride tubes; hemolyzed specimens

Analytic Time:

4 working days

Reference Range:

Fasting insulin = 3-19 uIU/mL

Interpretive Data:

To convert to pmol/L, multiply uIU/mL by 6.0. The reference interval 
for a fasting insulin is 3-19 uIU/mL.

This assay reacts on a nearly equimolar basis with insulin aspart, 
insulin glargine, and insulin lispro.

Comments:

Allow serum to clot completely at room temperature.  Separate serum or 
plasma from cells ASAP.

Test
Limitations:

This assay reacts on a nearly equimolar basis with insulin aspart, 
insulin glargine, and insulin lispro.

Methodology:

Chemiluminescent Immunoassay

CPT Code:

83525

See Additional Information:
Specimens Requiring Immediate Delivery