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Lab Dept:
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Chemistry
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Test Name:
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IGG (IMMUNOGLOBIN G)
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General Information
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Lab Order Codes:
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IGG
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Synonyms:
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Immunoglobulin G
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CPT Codes:
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82784 – Gammaglobulin; IgG, each
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Test Includes:
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IgG concentration reported in mg/dL.
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Logistics
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Test Indications:
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Immunoglobulins, also known as humoral antibodies, recognize antigens and initiate mechanisms that destroy antigens. The major immunoglobulin produced by plasma cells is IgG, which makes up 70-75% of the total immunoglobulins. The major function of IgG appears to be neutralization of toxins (bacterial or viral) in tissue spaces.
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Lab Testing Sections:
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Chemistry (all specimens analyzed on the Mpls campus)
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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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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1 – 4 days, test performed Tuesday, Wednesday and Friday
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Special Instructions:
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N/A
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Specimen
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Specimen Type:
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Blood
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Container:
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Red top (plain, no gel) tube
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Draw Volume:
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0.6 mL blood
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Processed Volume:
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0.2 mL serum
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Collection:
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Routine venipuncture
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Special Processing:
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Lab Staff: Centrifuge specimen, remove serum aliquot into a plastic sample cup. Specimens can be stored at refrigerated temperatures. Centrifuge turbid or particulate samples prior to analysis.
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Patient Preparation:
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None
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Sample Rejection:
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Mislabeled or unlabeled specimen, specimens other than serum, turbid samples that do not clear after centrifugation
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Interpretive
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Reference Range:
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Age:
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Range (mg/dL):
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Newborn:
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611 - 1542 mg/dL
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1 month:
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241 - 870 mg/dL
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2 months:
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198 - 577 mg/dL
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3 months:
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169 - 536 mg/dL
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4 - 6 months:
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165 - 781 mg/dL
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7 - 9 months:
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282 - 1026 mg/dL
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10 months - 1 year:
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331 - 1165 mg/dL
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2 years:
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407 - 1009 mg/dL
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3 years:
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423 - 1090 mg/dL
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4 - 5 years:
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445 - 1187 mg/dL
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6 - 8 years:
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608 - 1229 mg/dL
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9 - 10 years:
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584 - 1509 mg/dL
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>10 years:
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734 - 1570 mg/dL
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Critical Values:
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N/A
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Limitations:
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N/A
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Methodology:
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Nephelometry BN Prospec
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References:
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Tietz, Norbert (1999) Textbook of Clinical Chemistry, 3rd edition, Philadelphia, WB Saunders Co., pp 507-509
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N Antisera to Human Immunoglobulins (IgG, IgA, IgM) Package Insert (June 2008) Siemens Healthcare Diagnostics, Newark, DE
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