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HelpTest Code ASO or LAB1178 Antistreptolysin O, Serum
Specimen Requirements
| Container Type: |
Optimal: Gold Acceptable: Red |
| Optimal Collection Volume: |
4.5mL; full tube |
| Minimum Volume: |
1 mL whole blood |
| Collection Instructions: |
Gently invert the sample 5-6 times after collection. |
| Specimen Transport: |
Refrigerate |
| Processing Instructions: |
1. Allow the specimen to clot for 30 minutes. 2. Centrifuge specimen within 2 hours of collection. 3. After centrifugation, specimen tubes without a gel barrier should have the serum aliquoted to a false bottom container. 4. Keep the serum refrigerated until testing can be performed. |
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Refrigerated | 7 days |
| Room Temperature | 2 days | |
| Frozen | 6 months |
Specimen Rejection Criteria
| Hemolysis | Mild OK; Moderate OK; Gross Reject |
| Lipemia | Mild OK; Moderate OK; Gross Reject |
| Icterus | Mild OK; Moderate OK; Gross Reject |
| Other | Quantity not sufficient |
Useful For
This assay provides useful information about the degree of streptococcus infection.
Methodology
Roche Cobas - Immunoturbidimetry
Reference Ranges
| Test ID | Age | Reference Range and Reporting Units |
|---|---|---|
| ASO | < 13 years | < 150 IU/mL |
| Adults (>13 years) | < 200 IU/mL |
Day(s) Performed
24/7
Expected TAT
Same day
Performing Laboratory
Bronson Laboratory, Chemistry - Kalamazoo
Sample Retention Time
7 days
CPT Code
86060
LOINC Code
25788-1