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SUGAR WATER TEST (089-3141) CPT 4 Code: 85547 Test Order Mnemonic: SUCHEM Applies To: Screening Test for Paroxysmal Nocturnal Hemoglobinuria (PNH) Lab: Hematopathology Request Form: Hematology B Patient Preparation: If patient is to receive RBC transfusion, collect specimen before transfusion. Collection: Routine venipuncture. Transport to lab within 3 hours of collection. Cause For Rejection: Clotted, collected in wrong tube (do not collect in EDTA), transported to lab improperly, hemolyzed, identification errors. See special instructions. Availability: Samples are accepted 8 AM-3 PM, Monday-Friday, at Sample Management, 5.136 McCullough. Turnaround Time: 1 hour Special Instructions: The test can be ordered only once per inpatient admission and once per month for outpatients. Additional requests require the approval of the laboratory director. Specimen: Blood Volume: 7 ml Minimum Volume: 4 ml Container: Fluoride (Gray top tube). Reference Range: Negative Critical Values: Positive. *Recommend confirmation with Acid Serum (HAM's) Test. Flow cytometry studies are now available for PNH. Test Method: Tube Osmotic Sucrose Interfering Substances: Hemolysis Revised 10/17/06 by L. Hinson, MT (ASCP) |
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