2001743
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Fetal Hemoglobin Determination for Fetomaternal Hemorrhage

FHGB
Example Reports
Abnormal
Normal

Icon

Time Sensitive

Ordering Recommendation

Detect and quantify the extent of fetomaternal hemorrhage in pregnant or postpartum women. Assess the need for Rh immunoglobulin (eg, RhoGAM) for fetomaternal hemorrhage.

New York DOH Approval Status

Testing is not New York state approved. Specimens from New York clients will be sent out to a New York state-approved laboratory.

Specimen Required

Patient Preparation

Maternal, pregnant or postpartum whole blood.

Collect

Lavender (EDTA) or pink (K2EDTA).
New York State Clients: Lavender (EDTA). Collect and ship Monday-Thursday only. Ship same day as collection.

Specimen Preparation

Transport 5 mL whole blood. (Min: 0.5 mL)
New York State Clients: Transport 5 mL whole blood. (Min: 1 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Clotted or hemolyzed specimens. Refrigerated specimens greater than 120 hours (5 days) old; Ambient specimens greater than 12 hours old. Specimens from males or nonpregnant females.

Remarks
Stability

Ambient: 12 hours; Refrigerated: 120 (5 days) hours; Frozen: Unacceptable

Methodology

Quantitative Flow Cytometry

Performed

Sun-Sat

Reported

1-2 days

Reference Interval

0.000-0.124%

Interpretive Data




Result
 Interpretation
% 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. For accurate calculation of RhIG dosage that includes maternal height and weight, please refer to the most recent AABB Technical Manual.

Compliance Category

Laboratory Developed Test (LDT)

Note

This test should only be used to detect and quantify the extent of fetomaternal hemorrhage, in pregnant or postpartum 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 (ARUP test code 0050610).

Hotline History

View Hotline History

 

Hotline History

Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
08/21/2023
X
X
X
N/A

CPT Codes

86356

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Components

Component Test Code* Component Chart Name LOINC
2001788 Fetal Hgb - Percent Fetal RBCs 55729-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • 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
  • Kleihauer-Betke Acid Elution for Fetal RBC Detection
  • Maternal Erythrocyte Diff
  • RhoGAM determination
Fetal Hemoglobin Determination for Fetomaternal Hemorrhage