| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Insulin, Free (Bioactive)
Test Code36700
CPT Codes
83527
Preferred Specimen
0.5 mL serum
Patient Preparation
Overnight fasting is required
Minimum Volume
0.3 mL
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) tube
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 12 hours
Refrigerated: 7 days
Frozen: 28 days
Refrigerated: 7 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis • Received room temperature
Methodology
Immunoassay (IA)
Setup Schedule
A.M.
Clinical Significance
The free insulin measurement is helpful in interpreting blood sugar concentration and its relationship to insulin injections in insulin-treated patients with insulin antibodies.
