Immunoglobulin G, Subclass 3

CPT: 82787
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Test Details

Synonyms

  • IgG Subclass 3
  • IgG3

Use

Evaluate immunodeficiency syndromes; evaluate recurrent sinusitis and otitis media

Limitations

This procedure is not suitable for the measurement of samples containing rheumatoid factor, paraproteins, other circulating immune complexes (CICs), or for lipemic or hemolyzed samples due to the unpredictable degree of nonspecific light scatter these sample types may generate. The results obtained from measuring IgG subclasses should not be used in assessing atopy in allergic patients.

Methodology

Immunologic

Reference Interval

See table.

Immunoglobulin G, Subclass 3

Age

Range (mg/dL)

Cord

27−146

0 to 2 m

4−23

3 to 5 m

4−100

6 to 8 m

12−62

9 to 35 m

13−82

3 to 4 y

16−84

5 to 6 y

16−94

7 to 8 y

18−102

9 to 10 y

20−100

11 to 12 y

17−109

13 to 14 y

20−105

15 to 17 y

19−107

18 to 19 y

19−109

>19 y

15−102

Specimen Requirements

Specimen

Serum

Volume

1 mL

Minimum Volume

0.4 mL

Container

Red-top tube or gel-barrier tube

Collection

Transfer specimen to a plastic transport tube.

Storage Instructions

Room temperature

Stability Requirements

Temperature

Period

Room temperature

14 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

Causes for Rejection

Gross lipemia; hemolysis

Clinical Information

Special Instructions

State patient's age on the request form.

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
160523 IgG, Subclass 3 2468-7 160523 IgG, Subclass 3 mg/dL 2468-7

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The LOINC® codes are copyright © 1994-2018, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf