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
Refrigerated: 5 days
Frozen: Unacceptable
Methodology
Enzymatic/Liquid Chromatography-Tandem Mass Spectrometry
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 (µmol 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
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 (µmol 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
Performing Laboratory
ARUP
New York DOH Approval Status
Yes