10 Questions
What tool is used to take a drop of blood from the sample for the blood smear examination?
Pipette
What is the purpose of tilting the blood tube at a 45-degree inclination when calculating the percentage of cellular blood components?
To facilitate filling the hematocrit tube with blood
What is used to block the upper end of the hematocrit tube after it has been filled with blood?
Index finger
What is the purpose of dipping the lower end of the hematocrit tube in clay and lifting the finger from the upper end?
To seal the tube with clay and allow the clay to enter
What is used to measure the length of the blood column in the hematocrit tube?
Graduated ruler in millimeters
What is the main function of veins in the body?
Collect oxygen-poor blood and return it to the heart
How is the length of a needle measured?
In either inches or millimeters
What does a higher value of Gauge (G) indicate for a needle?
Smaller diameter
What determines the choice of syringe and needle for blood collection?
The method in which blood is collected
What is the main function of arteries in the body?
Bring oxygen-rich blood from the heart to all body cells
Study Notes
Blood Smear Examination
- A micro-hematocrit pipette is used to take a drop of blood from the sample for blood smear examination.
Hematocrit Tube Preparation
- Tilting the blood tube at a 45-degree inclination is necessary to ensure proper mixing of blood components for accurate percentage calculation.
Sealing the Hematocrit Tube
- A clay seal is used to block the upper end of the hematocrit tube after it has been filled with blood.
Preparing the Hematocrit Tube for Centrifugation
- Dipping the lower end of the hematocrit tube in clay and lifting the finger from the upper end prepares the tube for centrifugation.
Measuring Blood Column Length
- A millimeter scale is used to measure the length of the blood column in the hematocrit tube.
Circulatory System Functions
- Veins function to return blood to the heart.
- Arteries function to distribute oxygenated blood from the heart to the rest of the body.
Needle Measurements
- The length of a needle is measured in inches or millimeters.
- A higher value of Gauge (G) indicates a smaller needle diameter.
Syringe and Needle Selection
- The choice of syringe and needle for blood collection is determined by the vein size and the amount of blood required.
Test your knowledge of hematology with this quiz on blood smear examination and calculating the percentage of cellular blood components. Learn about the tools and steps involved in examining the shape of red blood cells and determining hematocrit percentage.
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