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FACTOR INHIBITOR SCREEN (089-0006) CPT 4 Code: 85335 Test Includes: Screens for inhibitors of factors of the extrinsic and intrinsic systems or for the presence of circulating lupus anticoagulant. Test Order Mnemonic: INHSCR Lab: Hematopathology Request Form: Hematology A Collection: Routine venipuncture; discard 1st mL of blood or collect other tubes (EDTA, red-topped) prior to collecting sample in blue-topped (citrate) tube. Storage Instructions: Viable for 4 hours at room temperature. If time from draw to receipt in the laboratory is to be greater than 4 hours, centrifuge the specimen; remove the plasma from red cells and snap freeze (-70°C) plasma. Snap frozen plasma is viable indefinitely. Causes for Rejection: 3.8% sodium citrate tube, QNS, clotted, severely hemolyzed specimen, specimen greater than 4 hours old, identification error, sample processed and/or stored improperly. Availability: Samples are accepted 24 hours per day at Sample Management, 5.136 McCullough Bldg. Turnaround Time: 4 hours Special Instructions: Deliver sample to lab within ½ hour for best results. Accepted up to four hours from draw. Specimen: Blood Volume: 4.5 mL blood Minimum Volume: Call Lab. Container: 3.2% sodium citrate tube (light blue-top) [NOTE:3.8% sodium citrate tubes will NOT be accepted.] Reference Ranges: Negative Test Method: Photo-Optical Detection Interfering Substances: Replacement or anticoagulant therapy Revised 10/11/07 by W. Russo, MT(ASCP) |
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