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FACTOR XIII (089-0013) Synonyms: Fibrin Stabilizing Factor CPT 4 Code: 85290 Test Order Mnemonic: FACTORXIII Applies To: Qualitative measurement of Factor XIII which, when present, stabilizes a fibrin clot. Lab: Hematopathology Request Form: Hematology A Collection: Routine venipuncture. Discard 1st ml of blood or collect other tubes (EDTA, Serum-separator, etc.) prior to collecting sample in citrate (blue-top tube). Storage Instructions: Viable for 4 hours at room temperature. If time from draw to delivery is to be greater than 4 hours, centrifuge the sample, separate the plasma from cells, and snap freeze (-70°C) the plasma. Snap frozen plasma is viable indefinitely. Causes for Rejection: 3.8% sodium citrate tube, QNS, clotted, severely hemolyzed, greater than 4 hours old, identification error, processed and/or stored improperly. Availability: Accepted 24 hours/day at Sample Management, Room 5.136 McCullough. Turnaround Time: 24 hours Special Instructions: Deliver sample to lab within ½ hour for best results. Accepted up to 4 hours. Specimen: Blood Volume: 4.5 ml Min Volume: Call Lab Container: 3.2% Sodium citrate tube (light Blue top tube) [NOTE: 3.8% sodium citrate tubes will NOT be accepted.] Reference Range: Normal = no lysis after 24 hours Test Method: Clot Solubility with 5M Urea Interfering Substances: Heparin, Fibrin split products, Factor XIII antibodies Reviewed 10/11/07 by W.Russo, MT(ASCP) |
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