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Questions and Answers
Which objective lens is used to observe RBCs?
Which objective lens is used to observe RBCs?
What is the significance of the density of blood cells on the smear?
What is the significance of the density of blood cells on the smear?
What does the presence of Heinz bodies indicate?
What does the presence of Heinz bodies indicate?
What is the most likely condition indicated by a left shift of neutrophils?
What is the most likely condition indicated by a left shift of neutrophils?
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What is the recommended systematic approach for observing blood smears?
What is the recommended systematic approach for observing blood smears?
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What does a right shift of neutrophils indicate?
What does a right shift of neutrophils indicate?
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What is the most likely condition indicated by toxic change in neutrophils?
What is the most likely condition indicated by toxic change in neutrophils?
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Which of the following is a reason for looking at blood smears?
Which of the following is a reason for looking at blood smears?
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What can be found in the feathered edge of a blood smear?
What can be found in the feathered edge of a blood smear?
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At what magnification is the monolayer of a blood smear examined?
At what magnification is the monolayer of a blood smear examined?
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What can be observed in the body of a blood smear?
What can be observed in the body of a blood smear?
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What is examined at high power in a blood smear?
What is examined at high power in a blood smear?
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What are the three cell series examined in a blood smear?
What are the three cell series examined in a blood smear?
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What is the ideal percentage of blood cells touching each other in the monolayer of a blood smear?
What is the ideal percentage of blood cells touching each other in the monolayer of a blood smear?
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Which part of a blood smear is expected to have the feathered edge?
Which part of a blood smear is expected to have the feathered edge?
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Study Notes
Objective Lenses and Blood Smears
- An oil immersion lens (100x) is used to observe RBCs.
Blood Smear Characteristics
- The density of blood cells on the smear is significant because it affects the clarity of the blood cell morphology.
- A high-power objective lens (50x to 100x) is used to examine the monolayer of a blood smear.
- The body of a blood smear is where the morphology of blood cells is observed.
- Red blood cells (RBCs), white blood cells (WBCs), and platelets are the three cell series examined in a blood smear.
Neutrophil Shifts
- A left shift of neutrophils indicates the most likely condition of infection or inflammation.
- A right shift of neutrophils indicates a delayed or ineffective response to infection.
Toxic Changes
- The presence of toxic changes in neutrophils indicates the most likely condition of severe infection.
Heinz Bodies
- The presence of Heinz bodies indicates the presence of denatured hemoglobin.
Blood Smear Examination
- The recommended systematic approach for observing blood smears involves examining the feathered edge, the monolayer, and the body of the smear.
- The ideal percentage of blood cells touching each other in the monolayer of a blood smear is 10-20%.
Feathered Edge
- The feathered edge of a blood smear is where the highest concentration of WBCs is found.
- The tail of a blood smear is expected to have the feathered edge.
Reasons for Blood Smears
- One reason for looking at blood smears is to examine blood cell morphology.
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Description
Test your knowledge on evaluating blood smears and why they are essential in identifying equipment errors and detecting abnormalities that machines may miss. Learn about the significance of different cell types and morphologies, as well as how to interpret differential plots. Take this quiz to enhance your understanding of blood smear evaluation.
