Test Details

Mnemonic

GLPHO

Ordering Code

3600044

CPT-4 Code(s)

82775

Specimen Information

Collect

Lavender EDTA

Specimen Preparation

Send 7.0 mL whole blood refrigerated.

Alternate Specimen

Whole blood: Green sodium or lithium heparin

Minimum Volume

3.0 mL

Transport Temperature

Refrigerated

Rejection Criteria

Grossly hemolyzed specimens

Stability

Room temperature: Unacceptable
Refrigerated: 5 days
Frozen: Unacceptable

Methodology

Enzymatic/Liquid Chromatography-Tandem Mass Spectrometry
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Reference Range

Reference Interval: Greater than or equal to 19.4 U/g Hb
Interpretive Data:
One U/g Hb is equivalent to one umol/hour/gram of hemoglobin (umol/hr/g Hb).
Genotype: Galactose-1-Phonsphate Uridyltransferase Activity (┬Ámol h-1 gHb-1)
Classic galactosemia (G/G): Less than or equal to 0.7
Duarte galactosemia (D/G): 3.1 - 7.8
Classic galactosermia carrier (G/N): 6.5 - 16.2
Duarte homozygous (D/D): 6.4 - 16.5
Duarte carrier (D/N): 12.0 - 24.0
Normal (N/N): Greater than or equal to 19.4
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Performing Laboratory

ARUP Reference Laboratory
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New York DOH Approval Status

Yes
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