Lab Testing

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Author:
docmc90
ID:
141445
Filename:
Lab Testing
Updated:
2012-03-13 20:13:42
Tags:
Lab Testing
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Description:
Patient Evaluation Lab Testing
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  1. What does a CBC measure?
    • Measurement of all major ingrdients of the blood.
    • Red blood cells (RBC)
    • Hemoglobin (Hb)
    • Hematocrit (Hct)
    • White blood cells (WBC)
  2. RBC
    Term
    Description
    Normal Value/Range
    Significance of Low Values
    Significance of High Values
    • Red blood cells
    • Contain hemoglobin
    • necessary for oxygen transport
    • Normal value = 4-6 mill/mm3
    • High RBC (polycythemia) = occurs with chronic tissue hypoxemia (i.e. COPD)
    • Low RBC (anemia) = Occurs with blood loss, hemorrhage
  3. Hb
    Term
    Description
    Normal Value/Range
    Significance of Low Values
    Significance of High Values
    • Hemoglobin
    • Carries oxygen (1.34 mL per gram Hb)
    • Normal value = 12-16 gm/100mL blood (g/dl)
    • Low Hb = anemia
    • High Hb = Polycythemia
  4. Hct
    Term
    Description
    Normal Value/Range
    Significance of Low Values
    Significance of High Values
    • Hematocrit
    • Spin the whole blood and measure the % of RBC in the original blood volume
    • Normal value = 40-50%
    • Low Hct = anemia
    • High Hct = Polycythemia
  5. WBC
    Term
    Description
    Normal Value/Range
    Significance of Low Values
    Significance of High Values
    • White blood cells
    • WBC are used by the body to fight infections
    • Normal value = 5,000-10000 per mm3
    • Increased wbc (leukocytosis) = bacterial infection
    • Decreased WBC (leukopenia) = viral infection

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