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Lab Dept:
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Hematology
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Test Name:
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HEMATOCRIT
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General Information
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Lab Order Codes:
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HCT
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Synonyms:
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Whole Blood Hematocrit; Microhematocrit; Packed Cell Volume; PCV
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CPT Codes:
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85014 – Blood count; Other than spun hematocrit
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Test Includes:
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Hematocrit reported as a %.
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Logistics
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Test Indications:
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Useful for evaluating anemia, blood loss, hemolytic anemia, polycythemia, and state of hydration, etc.
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Lab Testing Sections:
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Hematology
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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2 hours
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Special Instructions:
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N/A
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Specimen
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Specimen Type:
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Whole blood
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Container:
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Lavender top tube (EDTA) or Lavender MicrotainerŽ
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Draw Volume:
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2 mL in a 5 mL Lavender tube or 0.5 mL in a Lavender MicrotainerŽ
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Processed Volume:
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Same as Draw Volume
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Collection:
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Fill to mark on tube or MicrotainerŽ. Mix thoroughly by gentle inversion.
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Special Processing:
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Lab Staff: Do Not centrifuge
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Patient Preparation:
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None
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Sample Rejection:
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Improper tube; clotted sample; underfilled tube; mislabeled or unlabeled specimens
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Interpretive
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Reference Range:
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Age and sex dependent; Refer to CBC Reference Value Table
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Critical Values:
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<21% and >65%
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Limitations:
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Falsely high results may occur with cryoproteins, significant leukocytosis, and giant platelets. False low results may be seen with microcytosis, in vitro hemolysis or with autoagglutinins.
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Methodology:
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Automated cell counter; calculated (HCT = RBC x MCV)
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References:
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Harmening DH (1997) Clinical Hematology and Fundamentals of Hemostasis, 3rd ed
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Updates:
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2/17/2005: Critical values previously listed as 0-7 days: <35/>65%, 8-28 days: <30/>65%, >28 days: <25/>65%.
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