Fetal Erythrocyte Quantitation
Label Mnemonic: FHGB
Epic Lab Code: LAB292
Flow Cytometry Service
6240 RCP
Flow Cytometry Resident: 467-6008
Flow Cytometry Lab: 467-6009 or 467-6010
Tube Station #260
Maternal Peripheral Blood
Specimen Instructions:
Specimen should be ambient or room temperature.
Collection Medium:
Lavender top tube 3 mL (EDTA)
1 mL whole blood
Rejection Criteria:
Cord blood samples are NOT accepted.
Delivery Instructions:
Deliver to laboratory immediately after collection. Send to tube station #260 or deliver to Specimen Control, 6240 RCP.
Testing Schedule:
0800-1630 Monday through Friday. For additional services, contact Clinical Pathology Resident on-call at pager #3404.
Turn Around Time:
24 hours (upon receipt in laboratory)
Reference Range:
Reference range is less than 0.45% Positive specimens reported as percent of maternal cells. Note: This reference range is established as the level at which greater than the usual 300 micrograms dose administered to Rh-negative women at delivery is required to prevent sensitization. The normal "Hemoglobin F value" for non-pregnant adults is less than 0.1%.
Please identify as MATERNAL or FETAL specimen. Screening test for fetal-maternal bleed. Optimal results are obtained from a sample within 6 hours of venipuncture. This procedure may obtain results from a sample up to 30 hours from collection. Call Flow Cytometry (467-6010) if testing is required on a fetal sample.
Flow Cytometry
CPT Code:
See Additional Information:
Specimens Requiring Immediate Delivery