Detect and quantify the extent of fetomaternal hemorrhage in pregnant or postpartum women. Assess the need for Rh immunoglobulin (eg, RhoGAM) for fetomaternal hemorrhage.
Quantitative Flow Cytometry
Maternal, pregnant or post-partum whole blood.
Lavender (EDTA) or pink (K2EDTA).
Transport 5 mL whole blood. (Min: 0.5 mL)
Frozen specimens. Clotted or hemolyzed specimens. Specimens older than 72 hours. Specimens from males or non-pregnant females.
Ambient: 12 hours; Refrigerated: 72 hours; Frozen: Unacceptable
The performance characteristics of this test were determined by ARUP Laboratories, Inc.
|% Fetal RBCs||The fetal RBC percentage is directly measured by flow cytometry and gives the percentage of fetal RBCs in the maternal circulation resulting from recent fetal-maternal hemorrhage. Post-partum, some fetal cells are expected (0.04% plus or minus 0.024%, mean plus or minus SD). For accurate calculation of RhIG dosage that includes maternal height and weight, please refer to the most recent AABB Technical Manual.|
Laboratory Developed Test (LDT)
This test should only be used to detect and quantify the extent of fetomaternal hemorrhage, in pregnant or post-partum women who need to be assessed for Rh immune globulin (e.g. RhoGAM®) or fetal-maternal bleeds.
For routine fetal hemoglobin (Hb F) testing, please order Hemoglobin Evaluation with Reflex to Electrophoresis and/or RBC Solubility (0050610).
|Component Test Code*||Component Chart Name||LOINC|
|2001788||Fetal Hgb - Percent Fetal RBCs||55729-8|
- Fetal Hemoglobin
- Fetal Maternal Bleed
- Fetal Maternal Erythrocyte Distribution, Blood
- Fetal-Maternal Erythrocyte Differentiation
- Fetomaternal Bleed by Flow Cytometry (Blood)
- Kleihauer Acid Elution (Fetal RBCs)
- Kleihauer-Betke Acid Elution for Fetal RBC Detection
- Maternal Erythrocyte Diff
- RhoGAM determination