Single Antigen Phenotype
| Indications | When determining the likelihood of hemolytic disease of the fetus and newborn in cases of maternal antibody, single antigen phenotyping can be ordered to find out if a father carries the antigen corresponding to a maternal antibody. Single antigen phenotyping can also be ordered in other scenarios where the red cell antigen to be typed is unknown. |
| Method | Standard test tube methodology, Hemagglutination |
| Test Information | Test dependent on the antigen present. Test is ordered for patient sample only. |
| Additional Test Information | If the patient has been transfused in the last three months, antigen typing of patient red cells may yield unreliable results due to the presence of donor cells. A pre-transfusion should be used for antigen typing, if available. RBC genotyping can provide this information in recently transfused recipients. |
| Sample Requirements | EDTA tube. Serum separator gel tube is not acceptable. |
| Requested Volume | 1 full 7 ml EDTA sample |
| Minimum Volume or Pediatric volume | Minimum volume: 1 full 7 ml EDTA sample Pediatric: 1 full 3 ml EDTA sample; neonate: 2 full 0.5 ml EDTA microtainers |
| Shipping Information | Ship at ambient temperature
Send samples to: |
| Requisition Form | RFT-Request for Testing Transfusion Services |
| Transaction Code | 3118-00 |
| CPT Codes | 86905 |
| Test Schedule | Monday through Sunday |
| Turn around Time (analytic time) | 24 hours if weekday; 48 hours if weekend |
| Report/ Results | Fax number required to receive report |