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Cerner Order Name Growth Hormone Growth Hormone, Blood

Performing Laboratory

St. Louis Children's Hospital

Lab Dept

Core Lab

Specimen Requirements

Specimen Type: Blood

Container/Tube  
Preferred: Light green-top (Lithium Heparin) Vacutainer
Acceptable: Gold/Red SST Vacutainer or Plain, red-top Vacutainer
Collection Volume: 1.0 mL (minimum 0.6 mL)
Patient Preparation: Sample should not be taken from patients receiving therapy with high biotin doses (i.e. >5 mg/day) until at least 8 hours following the last biotin administration.
Sample Rejection:

Samples that are grossly hemolyzed

Mislabeled or unlabeled specimens.
Special Instructions:

If multiple specimens are collected, make sure all samples have orders and are labeled with correct collection time.
Send each specimen promptly to lab.

Logistics

Test Availability: Daily

Test set-up: Monday-Sunday
Cut-off time: None; performed as received
Turnaround Time: Same day; 2 hours from receipt in lab
Lab Testing Section: Chemistry

Interpretive

Reference Range: None established.
Values below the limit of detection are reported as <0.03 ng/mL

Due to pulsatile secretion, random measurement has little clinical utility. Stimulatory tests in the assessment of growth hormone deficiency yield concentrations greater than 7.0-10 ng/mL in normal pediatric patients. Growth hormone concentrations are suppressed to less than 1.0 ng/mL in normal patients following glucose load. References: Clin Lab Med 2004;24:141-174, J Clin Endocrinol Metab 2007;92:4623-4629.

Critical Values: None established
Limitations: In rare cases, interference due to extremely high titers of antibodies to analyte-specific antibodies, streptavidin or ruthenium can occur. For diagnostic purposes, the results obtained from this assay should always be used in combination with the clinical examination, patient medical history, and other findings.

Methodology: Electrochemiluminescence Immunoassay (ECLIA) sandwich principle.

Additional Information

For SLCH Laboratory use only

Lab Processing instructions: Centrifuge specimen to separate within 1 hour of collection. If specimen is collected in microtainer or plain, red-top tube aliquot sample into a conical tube for testing (labeling aliquot with specimen type).
Processed Volume: 0.3 plasma/serum
Analyte Stability:

Ambient - unprocessed: 1 hour

PROCESSED:

Ambient: 1 hour
Refrigerated: 8 hours
Frozen: 2 months
Notes: 

reject if specimen is grossly hemolyzed

Will also accept Lavender-top (EDTA) Vacutainer

General Information

EPIC order name: Human Growth Hormone  (EPIC Test# LAB525)
Cerner order name: Growth Hormone
CPT Codes: 83003
LOINC Value: 
Synonyms:  

Last Reviewed

November 2024