Insulin Like Growth Factor 1
General Information
- Lab Name
- Insulin Like Growth Factor 1
- Lab Code
- IGF1
- Epic Ordering
- Insulin Like Growth Factor 1
- Description
Insulin-like growth factor 1 (IGF-1) is the most important growth-stimulating homone downstream of growth hormone. It is most useful in the diagnosis of growth disorders and in monitoring their treatment.
- Synonyms
- IGF-1, Somatomedin C
Interpretation
- Method
Two-site chemiluminescent immunoassay
- Reference Range
-
Units: ng/mL
Female Male Age Range Age Range 0-11m 14-192 0-11m 18-156 1y 23-243 1y 14-203 2y 28-256 2y 16-222 3y 31-249 3y 22-229 4y 33-237 4y 30-236 5y 36-234 5y 39-250 6y 39-246 6y 47-275 7y 44-279 7y 54-312 8y 51-334 8y 61-356 9y 61-408 9y 67-405 10y 73-495 10y 73-456 11y 88-585 11y 79-506 12y 104-665 12y 84-551 13y 120-719 13y 90-589 14y 136-729 14y 95-618 15y 147-691 15y 99-633 16y 153-611 16y 104-633 17y 149-509 17y 107-615 18y-22y 85-370 18y-22y 91-442 23y-25y 73-320 23y-25y 66-346 26y-30y 66-303 26y-30y 60-329 31y-35y 59-279 31y-35y 54-310 36y-40y 54-258 36y-40y 48-292 41y-45y 49-240 41y-45y 44-275 46y-50y 44-227 46y-50y 40-259 Effective date: 06/01/2023
- Interferences and Limitations
Biotin is known to interfere with this assay. Patients should not take supplements or multivitamins containing biotin for at least 24 hours before blood collection.
Ordering & Collection
- Specimen Type
- Blood
- Collection
-
Acceptable: 3 ml blood in a Gold top preferred
Also acceptable: Red top tube
Patient Preparation: Biotin is known to interfere with this assay. Patients should not take supplements or multivitamins containing biotin for at least 24 hours before blood collection.
- Handling Instructions
- Quantity
-
requested: 1.0 mL
minimum: 0.75 mL
Processing
- Processing
Centrifuge sample promptly and transfer 0.5 mL serum each to a separate plastic aliquot. Freeze serum at -20°C.
Stability:
Frozen (preferred): 28 days; Refrigerated: 48 hours; Ambient: 24 hours
This test replaces test code RIGF1P as of June 1st 2023. If EPIC orders are entered for RIGF1P, order this test in its place. Contact to the ordering provider is not required.
Performance
- LIS Dept Code
- Chemistry, University (CHU)
- Performing Location(s)
-
UW-MT Chemistry, Automated
206-520-4600Clinical Lab, Room NW220,
University of Washington Medical Center,
1959 NE Pacific street, Seattle, WA 98195 - Frequency
- Weekly (Wednesday)
- Available STAT?
- NO
Billing & Coding
- CPT codes
- 84305
- LOINC
- 2484-4
- Interfaced Order Code
- UOW4784
- Interfaced Result Code
- UOW4784