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Hemotology
Blood Composition and WBC Count
Question | Answer |
---|---|
What are the RBC components of the cellular portion of the blood? | Erythrocytes |
What are the WBC components of the cellular portion of the blood? | Leukocytes |
What are the Platelet components of the cellular portion of the blood? | Thrombocytes |
What is the main component of the fluid portion of the blood? | 91.5% water |
How would blood settle in an anticoagulated tube from top to bottom? | Plasma, Buffy Coat, RBCs |
What is the difference between serum and plasma? | Serum is plasma with fibrinogen and clotting factors removed |
What anticoagulant is in a lavender tube? | EDTA |
What anticoagulant is in a gold or Red tube? | None |
What anticoagulant is in a blue tube? | Sodium Nitrate |
What test is a lavender tube primarily used for? | Hemotology study, complete CBC |
What test is a gold tube primarily used for? | Chemistry |
What test is a blue tube primarily used for? | PT & PTT, coagulation studies |
What test is a red tube primarily used for? | Chemistry |
What 2 samples are unacceptable for hematologic study? | Hemolyzed, Partially clotted |
What is leukocytosis? | Increased WBC count |
What causes leukocytosis? | Acute bacterial infections, pneumonia. |
What is leukopenia? | Degreased WBC count, below normal |
What causes leukopenia? | Decreased production of WBCs, viral infection, influenza |
What are the normal values for an adult WBC? | 4,000 - 11,000 |
What is an example of a critical WBC count value? | Less than 2,000 or more than 50,000 |
What tests make up a complete CBC? | RBC count, WBC count, Hemoglobin, Hematocrit, Differential, Red Cell Indices, Platelet Estimate. |