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HelpTest Code LAB4418 KLEIHAUER BETKE STAIN (Fetomaternal Hemorrhage)
Specimen Type
Whole Blood EDTA (Lavender Top Tube)
Collection Instructions
Maternal samples should be collected and assayed as soon after deliver as possible.
Specimen Volume
2 mL
Minimum Volume
1 mL
Sample Stability
Fixed slides are stable for 30 days stored in the freezer
Synonyms
Kleihauer, Quantitiative Fetal Screen, KB Stain, Acid Elution, Fetomaternal Hemorrhage
Test Schedule
Daily
Method
Acid Elution
Test Includes
% Fetal RBC Ratio
Reference Range
| AGE | REFERENCE RANGE |
|---|---|
| Amniotic Fluid | 0.0% |
| Full- Term Newborns | 64-95% |
| 6 months | 5.0% |
| Adults | 0.0%-0.90% |
| Fetal/Maternal Bleed |
0 - 0.20% Important: Refer to RhIG dosing if result is >0.20% Note: Less than or equal to 0.20% is negative and only 1 vial of RhIG is needed. |