Insulin-like Growth Factor 1, (IGF-1)
Collect SST/0.5 mL serum, after 30 minutes of clotting, promptly centrifuge and send.
Alternate specimen: Red top
Patient preparation: Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.
Immunochemiluminometric assay (ICMA)
Room temp: 3 days, Refrigerated: 7 days, Frozen: 90 days
Results of the insulin-like growth factor-1 assay are to be used in conjunction with other clinical and laboratory data to assist the clinician in the assessment of growth disorders.