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Test Code FGHRH Growth Hormone Releasing Hormone (GH-RH, also known as GHRF or GRF)


Specimen Required


Patient preparation: Patient should not be on any medications that may influence pituitary secretion.

Specimen Type: Serum

Collection Container/Tube:

Preferred: Red top

Acceptable: SST

Submission Container/Tube: Plastic vial

Specimen Volume: 3 mL

Collection Instructions:

1. Draw blood in a plain, red-top tube(s), serum-gel tube(s) is acceptable.

2. Centrifuge and aliquot 3 mL of serum into a plastic vial.

3. Send frozen.


Method Name

Direct Enzyme Immunoassay (EIA)

Reporting Name

Growth Hormone Releasing Hormone

Specimen Type

Serum

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Frozen 180 days

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject
Gross icterus Reject

Clinical Information

Growth Hormone Releasing Hormone is a 44 amino acid peptide produced primarily by the hypothalamus. It is a neurohumoral control for adenohypophyseal secretion of Growth Hormone. Other hypothalamic hormones have a stimulatory effect on pituitary hormones, but Growth Hormone Releasing Hormone has no known effect on other pituitary hormones. Somatostatin is the inhibitory counterpart of Growth Hormone Releasing Hormone. Growth Hormone Releasing Hormone has structural similarities with the Secretin-Glucagon family of gastrointestinal hormones. Growth Hormone Releasing Hormone has been isolated from pancreatic Islet Cells and various cancer tumor cells.

Reference Values

5-18 pg/mL

Day(s) Performed

Monday through Friday

Report Available

12 to 14 days

Performing Laboratory

Inter Science Institute

Test Classification

This test was developed and its performance characteristics determined by Inter Science Institute. Values obtained with different methods, laboratories, or kits cannot be used interchangeably with the results on this report. The results cannot be interpreted as absolute evidence of the presence or absence of malignant disease.

CPT Code Information

83520