The instrument by which BP is determined

Options

A. ultrasound
B. BP meter
C. stethoscope
D. sphygmomanometer

Explanation

To determine the instrument used for measuring blood pressure, follow these steps:

1. **Identify the Question**: The question asks for the name of the instrument that measures blood pressure (BP).

2. **Consider the Options**: The likely options could include various medical instruments such as sphygmomanometer, stethoscope, ultrasound, and BP meter.

3. **Analyze Each Option**:
- **Ultrasound**: This instrument uses ultrasonic waves for imaging and cannot measure blood pressure.
- **Stethoscope**: This device is used to listen to sounds produced within the body, such as heartbeats and bowel sounds, but it does not measure blood pressure directly.
- **BP Meter**: While commonly used at home to measure blood pressure, it is less accurate than the sphygmomanometer.
- **Sphygmomanometer**: This is the traditional and most accurate instrument for measuring blood pressure. It often uses mercury levels to provide precise readings.

4. **Select the Correct Answer**: Based on the analysis, the correct instrument for measuring blood pressure is the **sphygmomanometer**.

5. **Final Confirmation**: The sphygmomanometer is widely recognized in the medical field for its accuracy and is used by healthcare professionals.

**Final Answer**: The instrument by which blood pressure is determined is called the **sphygmomanometer**.

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