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Lab Dept:
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Hematology
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Test Name:
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G6PD
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General Information
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Lab Order Codes:
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G6P
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Synonyms:
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Glucose-6-Phosphate Dehydrogenase Quantitative, Erythrocytes; G-6-PD Erythrocytes; G-6-PD
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CPT Codes:
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82955 - Glucose-6-Phosphate Dehydrogenase; quantitative
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Test Includes:
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Glucose-6-Phosphate Dehydrogenase level reported in U/g hemoglobin.
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Logistics
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Test Indications:
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Useful for evaluation of individuals with Coombs-negative non-spherocytic hemolytic anemia
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Lab Testing Sections:
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Hematology - Sendouts
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Referred to:
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Mayo Medical Laboratories (MML Test G6PD/8368)
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Phone Numbers:
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MIN Lab: 612-813-6280
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STP Lab: 651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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2 – 4 days, test is set up Monday - Saturday
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Special Instructions:
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Special collection tube required, see Container.
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Specimen
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Specimen Type:
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Whole blood
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Container:
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Yellow top tube (ACD- solution B), tubes are available from the laboratory. Alternate: Lavendar (EDTA) top tube
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Draw Volume:
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6 mL (Minimum: 1 mL) blood
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Processed Volume:
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Same as Draw Volume
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Collection:
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Routine venipuncture
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Special Processing:
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Lab Staff: Do not centrifuge. Specimen should remain in its original collection tube. Do not transfer to other containers. Store and ship at refrigerated temperatures. Forward promptly.
Specimen can not be frozen.
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Patient Preparation:
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None
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Sample Rejection:
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Specimen frozen at any time after collection; gross hemolysis; mislabeled or unlabeled specimens
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Interpretive
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Reference Range:
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8.8 – 13.4 U/g Hb
Note: Abnormal values are usually 0-20% of normal mean.
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Limitations:
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In African-Americans with G-6-PD A-variant, normal values may be measured for several weeks following hemolysis. This is not the case with other G-6-PD variants that predispose to hemolysis.
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Methodology:
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Kinetic Spectrophotometry (SP)
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References:
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Mayo Medical Laboratories January 2012
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Updates:
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8/25/2010: Updated units and reference range.
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