| 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 Container
Plastic screw-cap vial
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 12 hours
Refrigerated: 7 days
Frozen: 28 days
Refrigerated: 7 days
Frozen: 28 days
Methodology
Immunoassay (IA)
Setup Schedule
Set up: Sun, Tues, Thurs; Report available: 4-7 days
Reference Range
| Insulin, Free | 1.5-14.9 uIU/mL |
Insulin analogues may demonstrate non-linear cross-reactivity in this assay. Interpret results accordingly.
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.
Performing Laboratory
| Quest Diagnostics Nichols Institute-San Juan Capistrano, CA |
| 33608 Ortega Highway |
| San Juan Capistrano, CA 92675-2042 |
