Specimen Requirements
Title
Hemoglobin, Free, Plasma
Specimen Requirement
Collect sodium heparin or lithium heparin, centrifuge within 1 hour of collection, transfer 1.0 mL plasma to a screw top transport tube, indicate sample type on tube and send.
Methodology
Colorimetric
Stability
Room temp: 7 days, Refrigerated: 7 days, Frozen: Unacceptable
Reference Range
By Report*
Turnaround
3-5 days, Performed Tue-Sat
Clinical Use
Evaluate hemolytic anemia, especially intravascular hemolysis. Plasma hemoglobin is increased with intravascular hemolysis, ABO incompatible transfusion, traumatic hemolysis, falciparum malaria, burns, and march hemoglobinuria. Increase may occur in some cases of extravascular hemolysis, delayed transfusion reaction, slight increase in sickle cell anemia, and β-thalassemia.
Test Code
PHFW