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PLATELET COUNT (089-0468) Synonyms: PLT CPT 4 Code: 85595 Test Order Mnemonic: PLT Test Includes: Platelet Count Applies To: Monitoring clotting status when other Complete Blood Cell (CBC) parameters are not required. Lab: Hematopathology Request Form: Hematology A Collection: Venipuncture preferred; Micro-collection acceptable. Storage Instructions: Stable at room temperature for 24 hours. Stable Refrigerated for 36 hours. Cause For Rejection: Clotted, QNS, identification error Availability: Samples are accepted 24 hours per day at Sample Management, 5.136 McCullough Turnaround Time: STAT: 1 hour; Routine: 4 hours Special Instructions: ECMO specimens should be delivered directly to the Hematopathology lab (5.142 McCullough) Specimen: Blood Volume: 2 ml Minimum Volume: 1 mL (0.5 mL in extreme emergency) Container: EDTA (Lavender-top tube) [Lab may request additional sodium citrate tube {blue top} in certain situations.] Reference Ranges: 150-400 x 103/mL Critical Values: Platelets < 50 or > 1000 x 103/mL Test Method: Part of an automated multi-parameter. Interfering Substances: High WBC counts, nucleated red blood cells, circulating micro-megakaryocytes, clumped platelets, fibrin strands, inappropriate anticoagulants, giant platelets, extreme microcytosis, RBC fragments. Reviewed/revised 10/10/07 by L.. Emanuel, MT (ASCP) |
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