Alpha-1-Antitrypsin and Alpha-1-Antitrypsin Genotype with Reflex to Alpha-1-Antitrypsin Phenotype
| Abbrev Code: | A1AGEN | ||
| Order Code: | LAB4375 | Order Name: | Alpha 1 Antitryp reflex to pheno |
| Order Instructions: | Test includes Alpha-1-Antitrypsin. Do not order AAT performed in PROT. | ||
| Synonyms: | Serpina Enzyme Concentration; Alpha 1 Antitrypsin | ||
| Methodology: | Immunoturbidimetric/polymerase chain reaction/Fluorescent resonance energy transfer/Isoelectric focusing | ||
| CPT Codes: | 81332 x1, 82103 x1 | ||
| Test Includes: | Alpha-1-Antitrypsin Enzyme Concentration and 2 mutations with reflex to phenotyping. | ||
| Turnaround Time: | Specimens are sent to reference laboratory Mon-Sat; results are reported in 2-10 days. | ||
| Compliance: | For tests developed and validated by ARUP (previously referred to as Compliance Statement B, C or D). This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the U.S. Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes. |
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Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 3 mL in purple (EDTA) tube AND 1.2 mL in red/black or gold (gel) |
| Minimum\Peds Volume: | 0.5 mL in purple (EDTA) AND 1.2 mL in red/black or gold (gel) |
| Container: | Purple (EDTA), Red or gold (gel) |
| Collection Instructions: | Must collect purple (EDTA) AND red/black or gold (gel) tubes. |
| Causes for Rejection: | Hemolyzed specimens. Frozen specimens in glass collection tubes. |
Processing and Shipping
| Specimen Processing: | Do not centrifuge purple (EDTA) tube. Allow serum specimen to clot completely at room temperature. Separate serum from cells ASAP. Aliquot 0.5 mL serum AND 3 mL whole blood (EDTA) 0.5 mL minimum. Store at refrigerated temperature. |
| Shipping Instructions: | Ship both specimens at refrigerated temperature. |
| Stability: | Serum: 1 week at room temperature; 3 months refrigerated or frozen.
Whole blood (EDTA): 72 hours at room temperature; 1 week refrigerated; 1 month frozen |
| Test Performed at or Referral Lab | Lab Sendouts (ARUP) |
| Referral Lab number: | 51256 |
Interpretive
| Reference Range: |
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| Use: | Genotyping performed by PCR followed by fluorescent probe melting analysis; AAT protein concentration measured using immunoturbidimetric assay; phenotyping performed by isoelectric focusing. Genotyping and AAT serum protein concentration determination are performed on all specimens. Protein phenotyping is performed on specimens that have AAT serum concentrations of less than 100 mg/dL and are heterozygous for either the S or Z allele by genotyping. In addition, protein phenotyping is performed on specimens that have serum protein concentrations of less than 100 mg/dL and do not contain either S or Z alleles by genotyping. Isoelectric focusing is not performed on specimens that are homozygous for deficiency alleles (ZZ, SZ, SS) genotyping. |
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