CLT Hematology & Blood Analysis Flashcards
6 cards from real CLT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CLT Hematology & Blood Analysis flashcards as text
Which anticoagulant is used in the lavender-top (purple) Vacutainer tube for CBC collection?
Answer: EDTA
EDTA (ethylenediaminetetraacetic acid) is the anticoagulant in lavender-top tubes; it chelates calcium to prevent clotting without altering cell morphology.
On a peripheral blood smear, target cells (codocytes) are most associated with which condition?
Answer: Iron deficiency anemia or liver disease
Target cells, which have a bull's-eye appearance, are classically seen in iron deficiency anemia, thalassemia, and liver disease.
What does an increased reticulocyte count indicate about bone marrow activity?
Answer: Increased red cell production
Reticulocytes are immature red blood cells; an elevated count indicates that the bone marrow is actively producing red cells, often in response to blood loss or hemolysis.
Which white blood cell is the most abundant in a normal adult differential count?
Answer: Neutrophils
Neutrophils make up approximately 50–70% of circulating white blood cells and are the first responders to bacterial infection.
A hematocrit of 55% in an adult male most likely suggests which condition?
Answer: Polycythemia
A hematocrit above 52% in males indicates polycythemia, an abnormally high proportion of red blood cells in the blood.
Which test measures the time it takes for a fibrin clot to form and evaluates the extrinsic coagulation pathway?
Answer: Prothrombin Time (PT)
Prothrombin Time (PT) evaluates the extrinsic and common coagulation pathways and is used to monitor warfarin therapy.