ESR (erythrocyte sedimentation rate) is meant for knowing

Options

A. degree of disease
B. erythrocyte count
C. study of plasma
D. calculation of haemoglobin

Answer

### Step-by-Step Solution:

1. **Understanding ESR**: ESR stands for Erythrocyte Sedimentation Rate. It is a laboratory test that measures the rate at which red blood cells (RBCs) settle at the bottom of a test tube over a specified period, usually one hour.

2. **Purpose of the Test**: The primary purpose of the ESR test is to assess the presence of inflammation in the body. It is a non-specific test that can indicate the degree of disease or inflammation but does not pinpoint the exact cause.

3. **Procedure**: Blood is collected in a test tube that has specific markings to measure the distance the RBCs settle. The test tube is placed upright, allowing the RBCs to settle due to gravity.

4. **Reading the Results**: After a certain period (typically one hour), the distance that the RBCs have fallen is measured. A higher sedimentation rate indicates a higher level of inflammation or disease activity.

5. **Conclusion**: Therefore, the ESR is primarily used to determine the degree of disease or inflammation in the body, making it a useful screening tool in various medical conditions.

### Final Answer:
ESR (erythrocyte sedimentation rate) is meant for knowing the degree of disease.

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