Fetaldex (Kleihauer-Betke)

SIM

LAB762

CPT

85460

Synonyms

Fetal Cell Stain; Kleihauer-Betke; KB test 

Specimen Type

Whole Blood 

Container

6.0 ml Pink - EDTA 

Collection Instructions

If performed to determine a fetal-maternal abruption, there are no special collection instructions. 

If performed to quantitate the necessary number of Rh Immune Globulin vials required for post partum prophylaxis, the patient must be Rh negative and testing must be performed on a Post Partum maternal specimen. 

Volume

Max:  6.0 ml EDTA whole blood 

Min:  0.5 ml EDTA whole blood

Additional Information

Due to the fact that this procedure includes manual staining with two separate air drying steps, this procedure will take over an hour to complete.

Patient Preparation

None

Specimen Processing Instructions

None

Transport Requirements

Refrigerated

Specimen Stability

N/A 

Rejection Criteria

Missing patient identification

Reference Range

Fetal-maternal abruption:  No Bleed

Critical Value

N/A 

Test Includes

Fetaldex

Methodology

Kleihauer-Betke acid elution

Testing Frequency

Daily, Monday-Sunday 

Reviewed By

Michele Earley

Reviewed Date

3/22/23

Supplemental