Proficiency Testing/EQA / 2024 Surveys / Immunology and Flow Cytometry / Flow Cytometry Help Please log in to determine if you are eligible to purchase PT Programs. FETAL RED CELL DETECTION - HBF Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS). Procedure Challenges per Shipment Number of Shipments Kleihauer‑Betke and flow cytometry 2 Two shipments per year Rosette fetal screen 2 Acid elution whole slide image 1 Additional Information See system requirements. Program Information Two 1.2-mL liquid whole blood specimens Not designed for F cell quantitation Two online, whole slide images per year with optional grids for cell counting Powered by DigitalScope® technology Shipping Schedule Shipment A: April 22 Shipment B: October 28 Guest Log in/Register