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Hemoglobin, Free, Plasma
Test Code514
CPT Codes
83051
Preferred Specimen
1 mL plasma collected in a sodium heparin (green-top) tube
Minimum Volume
0.2 mL
Other Acceptable Specimens
Plasma collected in: Lithium heparin (green-top) tube
Instructions
Centrifuge plasma within 1 hour of collection. Transfer the plasma to a sterile, plastic, screw-cap vial. Do not freeze specimen.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: Unacceptable
Refrigerated: 7 days
Frozen: Unacceptable
Methodology
Colorimetry (C)
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
A.M. Sets up 5 days a week.
Clinical Significance
The presence of free hemoglobin in plasma is an indication of intravascular hemolysis resulting from numerousconditions, among which include Paroxysmal Nocturnal Hemoglobinuria (PNH), Sickle-Cell Disease (SCD), Thalassemias, Hereditary Spherocytosis, Microangiopathic Hemolytic Anemias, Pyruvate Kinase Deficiency, ABO Mismatch Transfusion Reaction, Cardiopulmonary Bypass or Mechanical Heart Valve-induced Anemia.
Reference: JAMA. 2005;293(13):1653-1662
Reference: JAMA. 2005;293(13):1653-1662