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Questions and Answers
What does the haematocrit (Ht) value measure?
What does the haematocrit (Ht) value measure?
What is the normal haematocrit value for females?
What is the normal haematocrit value for females?
What condition is associated with an increase in haematocrit value?
What condition is associated with an increase in haematocrit value?
What method is used to measure the haematocrit value?
What method is used to measure the haematocrit value?
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Which of the following best describes the haematocrit value (Ht)?
Which of the following best describes the haematocrit value (Ht)?
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What condition is associated with a decrease in haematocrit value (Ht)?
What condition is associated with a decrease in haematocrit value (Ht)?
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In the method for measuring haematocrit value (Ht), what is used to prevent blood from clotting?
In the method for measuring haematocrit value (Ht), what is used to prevent blood from clotting?
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What does the Erythrocyte Sedimentation Rate (ESR) measure?
What does the Erythrocyte Sedimentation Rate (ESR) measure?
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What is the normal haematocrit value for males?
What is the normal haematocrit value for males?
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What would be the effect on haematocrit value (Ht) after saline infusion?
What would be the effect on haematocrit value (Ht) after saline infusion?
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Study Notes
Haematocrit (Ht) Value
- Measures the proportion of red blood cells in the blood
- Normal values:
- Females: 37-48%
- Males: 41-53%
- An increase in Ht value is associated with polycythaemia (excessive red blood cells)
- A decrease in Ht value is associated with anaemia (insufficient red blood cells)
Measurement of Haematocrit Value
- Measured using a microhaematocrit centrifuge
- Anticoagulant (e.g. EDTA) is used to prevent blood from clotting during measurement
Erythrocyte Sedimentation Rate (ESR)
- Measures the rate at which red blood cells settle at the bottom of a test tube
- Used to detect inflammation and monitor disease activity
Effect of Saline Infusion on Haematocrit Value
- Saline infusion would decrease the haematocrit value due to haemodilution (dilution of red blood cells with excess fluid)
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Description
Learn about haematocrit value (Ht), which measures the volume of red blood cells in the blood. Explore the normal values for males and females, and understand how to interpret results in relation to conditions such as polycythemia, dehydration, anaemias, and overhydration.
