Test Overview
Test Methodology

Acid Elution

Test Usage

To assess the magnitude of fetal-maternal hemorrhage.

Reference Range *

0.00 - 0.20 %

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

2 - 4 hours

Soft Order Code
KBT
MiChart Code
Hemoglobin, Fetal
Synonyms
  • Acid Elution for Fetal Hemoglobin
  • Fetal Hemoglobin
  • Hemoglobin F (Fetal)
  • Hgb F
  • K-B
  • Kleihauer-Betke (KB)
  • KLEIHAUER-BETKE
  • HEMF
  • HEMOGLOBIN F, BLOOD
  • HGB F TEXT
  • HGB-F
  • HEMOGLOBIN F INTERPRETATION
  • Fetal Maternal Hemorrhage
Laboratory
Hematopathology
Section
Hematology
STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

Specimen Requirements
Collection Instructions

Collect specimen in a lavender top EDTA K2 Vacutainer® tube as soon after delivery or incident as possible. Refrigerate and send intact within 24 hours of collection.

Alternate Specimen
Any EDTA K2 collection tube is acceptable, including, but not limited to Pink top EDTA K2 and Tan top EDTA K2 tubes.
Rejection Criteria
Specimens clotted, diluted with IV fluid, or in improper tubes will be rejected. Liquid EDTA K3 collection tubes are not acceptable due to possible dilutional effects.
Red Top Tube
Normal Volume
3 mL EDTA K2 whole blood
Minimum Volume
1 mL EDTA K2 whole blood
Billing
CPT Code
85460
Fee Code
22315
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