The Ret-He may be useful for screening for iron deficiency when traditional biochemical parameters are non-informative.
Immediately after collection, mix the tube by gentle inversion to prevent clotting.
Submit tube unspun
Lavender (EDTA), 4mL
Refrigerated (preferred) - 48 hours
Ambient - 24 hours
Sysmex
29.0 - 35.0 pg