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Test Code GH L Growth hormone L Dopa

Clinical System Name

Growth Hormone L-Dopa


L- Dopa Growth Hormone Stimulation

Sample Requirements

Specimen: Whole blood

Container(s): Red; Gold SST, Gold Microtainer, Lt. Green/ Lithium Heparin Microtainer, Dark Green/Sodium 

Preferred Vol: 1.0 mL

Minimum Vol: 0.5 mL


Note: Label each specimen and requisition with time drawn. Samples are drawn at 30, 60,  and 90 min. GH B must be ordered if baseline required. Avoid hemolysis. Contact Chemistry Lab for more information (206) 987-2565.

Processing Instructions

Reject due to: gross lipemia, gross hemolysis

Spin: Y

Aliquot: Y

Temp: - 20 C

Storage location: CPA freezer, Fz2 rack. Serum/plasma should be removed from separator for storage. Each specimen should be numbered and labeled with time drawn. Store label with sample.


Off-site collection: Label specimen and requisition with time of draw. Samples are drawn at  30, 60, and 90 minutes. Order GH B if baseline level requested. Spin blood. Transfer serum to plastic aliquot container. Send frozen.


Specimen Type Temperature Time
gel separator with serum/plasma Refrigerated 8 h
separated serum/plasma Room temp  
  Refrigerated 8 h
  Frozen -20 C 2 m



STAT Performed TAT
N T, Th, day shift 2 - 5 d


Performing Laboratory

Seattle Children's Laboratory    


Department:  Chemistry

Location: Chem East

Phone Number:  (206) 987-2617

Reference Range


Age Baseline (Rest) After Stimulation
> 2 weeks 0 - 6 ng/mL >/= 6 ng/mL


Test performed is growth hormone, after L-Dopa  stimulation.


Method: Chemiluminescent Immunoassay on IDS iSYS

Analytical Volume: 0.30 mL serum per level


CPT Codes

83003 x 3

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