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Test Code:
IGF1

Order Name:
IGF-I

 
Useful For:
For the quantitative measurement of insulin-like growth factor I (IGF-1) in serum or heparinized plasma, as an aid in the evaluation of growth disorders.
 
Methodology:
Chemiluminescent Immunometric assay
 
AliasesName:
Insulin-Like Growth Factor-Binding Protein 1
 
 
 
Test Code:
IGF1

Order Name:
IGF-I

 
Collection Specimen Or Container:
Blood/ Plain Blood (Red Top) 6 mL, 1 tube
 
Specimen Testing Type:
Serum, minimum volume 1 mL
 
Sub Mission Container:
Plastic vial
 
Rejection Criteria:
Hemolysis: 4+ reject
 
Specimen Stabillity:
Specimen Type Temperature Time
Serum (keep in original tube) Refrigerated, 2oC to 8oC 8 hours
Serum Refrigerated, 2oC to 8oC 24 hours
Frozen, -20oC 12 months
 
 
 
Test Code:
IGF1

Order Name:
IGF-I

 
Method detail:
Chemiluminescent Immunometric assay
 
Schedule:
Tested Daily until 8:00 p.m.
 
Turnaround Time:
Specimen collected to reported within 1 day
 
 
Performing Location:
Immunology, Laboratory Department Tel. 13227
 
Specimen Retention Time:
5 days
 
 
 
Test Code:
IGF1

Order Name:
IGF-I

 
 
Clinical Information:
In humans, plasma IGF-1 levels are barely detectable at birth, rise gradually during childhood, peak during mid-puberty until approximately 40 'tears of age, then decline gradually. Maternal plasma levels increase during pregnancy. In the diagnosis of growth disorders, measurements of IGF-1 are a useful indicator of growth hormone (GH) secretion. A normal plasma or serum IGF-1 concentration is strong evidence against GH deficiency. A low IGF-1 value implies GH deficiency and requires additional testing to determine whether GH secretion is subnormal. Measurement of IGF-1 is also useful in assessing change of nutritional status. 
 
Reference Value:
Age group Reference value Unit
Neonates 1.5 IU/mL
Infants in 1st year of life 15 IU/mL
Children aged 1-5 years 60 IU/mL
Children aged 6-9 years 90 IU/mL
Children aged 10-15 years 200 IU/mL
Adults 100 IU/mL
 
Clinical Reference:
Manufacturer’s Reagent package insert, IMMULITE 2000 IGF-I (PIL2KIGF-4, 2018-07-02)