To prevent clotting , donor's blood is treated with

Options

A. Sodium glycocholate
B. Sodium citrate
C. Heparin
D. Sodium taurocholate

Answer

To answer the question "To prevent clotting, donor's blood is treated with?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Purpose**: The primary goal is to prevent the clotting of donor's blood. Clotting can interfere with blood transfusions and storage.

2. **Identify Anticoagulants**: Anticoagulants are substances that prevent blood from clotting. Common anticoagulants include sodium citrate and heparin.

3. **Evaluate Anticoagulants**:
- **Heparin**: While heparin is an anticoagulant, it is not suitable for treating donor's blood because the large quantities required can lead to coagulation defects in the recipient.
- **Sodium Citrate**: This is a commonly used anticoagulant in clinical settings. It is effective in preventing clotting when mixed with blood.

4. **Mechanism of Action**: Sodium citrate works by chelating (binding) calcium ions in the blood. Calcium is essential for the blood clotting process, so by binding to it, sodium citrate disrupts the clotting mechanism.

5. **Usage Ratio**: In blood banks, sodium citrate is typically used in a ratio of 9 parts sodium citrate to 1 part blood.

6. **Conclusion**: Based on the information gathered, the correct answer to the question is that donor's blood is treated with sodium citrate to prevent clotting.

### Final Answer:
To prevent clotting, donor's blood is treated with sodium citrate.

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