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Order Code LAB8077 Fetal Maternal Bleed Screen

Important Note

This test is for Rh negative mothers who have delivered an Rh Positive Baby.

Order FMB for potential trauma during pregnancy.

Additional Codes

Test Name in EPIC

EPIC Test Code           

Mnemonic

RV Fetal Maternal Screen

LAB8077

FMH

PRIOR TO 8/1/21:  FMBS

Useful For

The fetal screen test relies on the D antigen, this test is valid only when an Rh negative mother delivers and Rh positive infant.  FMBS is used to detect fetomaternal hemorrages greater than 30 mL of whole blood utilizing the rosette technique.  FMBS tests interpreted as positive are followed with a second sample for Kleihauer-Betke testing (sent to reference lab) to calulate the appropriate dosage of Rh immune globulin, based on the estimated volume of fetal whole blood or red blood cells in maternal circulation.

Specimen Requirements

Specimen Type: EDTA

Container/Tube: Whole Blood EDTA

Preferred: Pink-top (EDTA) tube

Acceptable: Purple-top (EDTA) tube

Specimen Volume: 3 mL whole blood

 

Collection instructions: Specimen's must be labeled with patient first and last name, MR# or DOB, date and time drawn, and phlebotomist's initials.

Specimen Stability

Specimen Type            Temperature                             Stability            
Whole blood Ambient (preferred) 2 days
  Refrigerated 2 days

Reference Values

Negative

Day(s) Test Set Up

Monday through Sunday

Performing Laboratory

Ridgeview Medical Center Laboratory

 

Note: If positive, a Fetal Maternal Bleed by Flow Cytometry (FMB) will be reflexed and sent out to Mayo Medical Laboratories.

Methodology

Immuno rosette qualitative test for D(RhO)-positive RBC's in sample

Reporting Name

Fetal Maternal Bleed Screen

Test Classification and CPT Codes

85461