Immunoglobulin A, Quantitative
Also known as: IgA, Serum, Quantitative IgA, Serum
Use
Evaluate humoral immunity; monitor therapy in IgA myeloma
Special Instructions
Indicate the patient's age on the test request form to ensure proper interpretation of results. Be mindful of temperature handling for samples suspected of containing macroglobulins or cryoglobulins to prevent false low values.
Limitations
False low values may occur if samples containing macroglobulins, cryoglobulins, or cold agglutinins are handled at incorrect temperatures. IgA values can also be influenced by exercise, which may elevate levels, and pregnancy, which may lower them. Patients with IgA deficiency and antibodies against IgA may experience anaphylaxis if transfused.
Methodology
Immunoassay
Biomarkers
LOINC Codes
- 2458-8
- 2458-8
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL (adult), 0.4 mL (pediatric)
Minimum Volume
Not provided
Container
Red-top tube or gel-barrier tube
Storage Instructions
Samples suspected of having macroglobulins or cryoglobulins should be drawn and held at 37°C. Samples suspected of containing cold agglutinins should not be refrigerated prior to serum separation from clot.
Causes for Rejection
Excessive lipemia
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |