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HIT (Heparin PF4 Antibodies) IgG
Message
Performed in the Hematology Laboratory x5475, 76.
Sample MUST be drawn to minimum fill line on tube
Test Code
HIT
Alias/See Also
Heparin Induced Thrombocytopenia
CPT Codes
86022
Preferred Specimen
plasma
Minimum Volume
2.7 mL. Sample Must be drawn to minimum fill line on tube or the sample will be rejected as QNS.
Transport Container
Light Blue Top (Sodium Citrate), 2.7 mL draw tube
Transport Temperature
Room Temperature
Specimen Stability
Refrigerator Stability: 24 hours
Plasma is stable for 6 months at -70C
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis, QNS, clotted
Methodology
ELISA - specific for IgG subtype
Setup Schedule
Monday, Wednesday, Friday 1pm. The test takes 3 hours to perform.
Limitations
There is no interference from heparin up to 1 IU/mL in plasma.
Reference Range
Negative (Normal)
Clinical Significance
Aid in the Diagnosis of Heparin-induced thrombocytopenia
