3 - 6 days
Update Type: Specimen collection or handling and/or storage changed
Test Updated: 07/22/2020
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To rule out the diagnosis of paroxysmal cold hemoglobinuria (PCH) in cases of hemoglobinuria, cold exacerbated hemolysis, unusual presentation of apparent warm or cold AIHA. A positive test is considered diagnostic for PCH.
Interpretive report provided.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect specimen in a red top tube. Maintain at 37 +/- 2 degrees C from the time it is collected until serum is separated from the cells. Within one minute of collection, place specimen into a 37+/- 2 degrees C incubator or waterbath. Leave specimen at 37 degrees C until clot retracts; after the clot retracts, remove serum from clot, centrifuge at room temperature, aliquot 5 mL cell free serum into a plastic tube and refrigerate. Please note on requisition or as a footnote in the computer that the specimen was processed at 37 degrees C.