Quantitative Chemiluminescent Immunoassay
This test is New York DOH approved.
- Patient Preparation
- Plasma separator tube or serum separator tube. Collect one tube per timed specimen. Also acceptable: Green (sodium or lithium heparin) or lavender (EDTA), or pink (K2EDTA).
- Specimen Preparation
- Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma per timed specimen to individual ARUP Standard Transport Tubes. (Min: 0.4 mL per timed specimen)
- Storage/Transport Temperature
- Frozen. Also acceptable: Refrigerated.
- Unacceptable Conditions
- Tissue or urine. Grossly hemolyzed or lipemic specimens.
- After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 2 months
Effective May 20, 2013
|18 years and older
Growth hormone stimulation tests should induce a peak of greater than 5 ng/mL in children and greater than 4 ng/mL in adults; lower values suggest growth hormone deficiency. For children, some experts consider values of 5-8 ng/mL equivocal and only peak values of greater than 8 ng/mL as truly normal.
For suppression testing, normal subjects have growth hormone concentrations of less than 0.8 ng/mL within 2 hours of ingestion of a 75 or 100 gram glucose dose. Patients with acromegaly fail to show normal suppression.
This Growth Hormone assay is now standardized to the Recombinant Second International Standard (IS): 98/574. Growth hormone results read approximately 25 percent lower than with the previous standards (First IS: 80/505). Reference ranges have also been modified according to the assay manufacturer.
|Component Test Code*||Component Chart Name|
|0070081||Growth Hormone 0 Minutes|
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, contact interface support at firstname.lastname@example.org.
- GH testing
- Growth Hormone Provocative Test
- Growth Hormone Stimulation
- growth hormone, Serum
- Human Growth Hormone
- Somatotrophic Hormone