IGF1
Test:
486
CPT:
84305
Synonyms
1-IGF-1
2-SM-C/IGF-1
Special Instructions
This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.
Expected Turnaround Time
3 – 4 days
Specimen Requirements
Specimen
3 – 4 days
Volume
0.5 mL
Minimum Volume
0.2 mL (Note: This volume does not allow for repeat testing.)
Container
Red-top tube or gel-barrier tube
Collection
Separate serum from cells. Transfer separated serum to a plastic transport tube. Please include the patient’s age on the test request form.
Storage Instructions
Refrigerate
Causes for Rejection
Plasma specimen
Test Details
Use
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.