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Test Code LAB4418 KLEIHAUER BETKE

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

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.