free hemoglobin in serum/plasma

Reference interval

• < 1 mg/dL

Clinical significance

• hemoglobin is an erythrocyte protein & is not normally present in serum or plasma
• hemoglobin in plasma thus derives from erythrocyte hemolysis

Increases

• erythrocyte hemolysis

Notes

• both CPT & Loinc have codes for hemoglobin in serum/plasma

More general terms

• free hemoglobin in body fluid

Additional terms

• hemoglobin
• hemoglobin (Hgb) in blood