RhD Evaluation (weak or partial D eval)
| Also Known as (Alias) | Rh genotyping |
| Indications | Red Cell (HEA) Genomics |
| Method | polymerase chain reaction (PCR) based |
| Test Information | This group of tests are performed for investigation of RhD typing discrepancies |
| Sample Requirements | EDTA (lavender top) |
| Requested Volume | 10cc EDTA (lavender top) tube(s) |
| Minimum Volume or Pediatric volume | 5cc EDTA |
| Sample Information | 5-10cc EDTA (lavender top) tube
If analysis of cultured amniocyte is requested, EDTA must also be drawn on mother of fetus. Two T-25 flasks of cells cultured to confluency will be accepted. Bloodworks Northwest does not have facilities to culture amniocytes. Bloodworks Northwest does not have facilities to culture amniocytes. |
| Shipping Information | Whole blood shipped at ambient temperature and should arrive in the lab within 48 hours.
Send samples to: For additional information please see Ordering Information |
| Requisition Form | RFT: Genomics Testing Laboratory (for Red Cell testing) |
| Transaction Code | 3117-07 |
| CPT Codes | 81404 x4 |
| Turn around Time (analytic time) | 7 -14 business days |
| Report/Results | Fax number required to receive report |
| Limitation of test | Molecular testing to predict the red blood cell phenotype does not always reflect the phenotypic expression of the blood group antigen. This may occur in cases where the individual has genetic variation that silences or alters the blood group antigen expression that is not included in the target region of the test, and also may occur with RhD zygosity testing. Test results must be interpreted with knowledge of how known polymorphisms affect blood group antigen expression. The performance characteristics have been established by Bloodworks Northwest. The results are not intended as the sole means for clinical diagnosis for donor or patient management decisions. |