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FETAL SCREEN
Test CodeFS
Alias/See Also
Rho(D) Immune Globulin Workup ; RhIG Workup ; RhoGAM Workup
CPT Codes
86900, 86905
Includes
Blood Type and Fetal Screen
Preferred Specimen
Pink Tube (EDTA)
Minimum Volume
1mL (6mL optimal)
Other Acceptable Specimens
Lavender Tube (EDTA)
Transport Container
One Pink Tube
Transport Temperature
Room Temperature
Specimen Stability
Store at 1-6 °C if not tested immediately. Sample can be tested for up to three days after collection.
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Specimen drawn in wrong tube; grossly hemolyzed specimen; improperly labeled; quantity not sufficient for analysis .
Methodology
Hemagglutination
Setup Schedule
Daily, 24hrs
Report Available
Typically 1 hour
Limitations
Mother must be Rho(D) negative, infant must be Rho(D) positive
Reference Range
Negative
If the fetal screen is positive, the Blood Bank technologist sends the test Kleihauer Betke sample to Hematology. The Pharmacy dispenses the number of Rh Immunoglobulin (Rhogam) based on the Kleihauer Betke result.
If the fetal screen is positive, the Blood Bank technologist sends the test Kleihauer Betke sample to Hematology. The Pharmacy dispenses the number of Rh Immunoglobulin (Rhogam) based on the Kleihauer Betke result.
Clinical Significance
Detect Rho(D) positive fetal red blood cells in the maternal circulation; Rh immune globulin dosage determination
Performing Laboratory
Mount Sinai Hospital
