Vital capacity, the maximum volume of air a person can inhale, is measured with

Options

A. spirometer
B. stethoscope
C. aspirator
D. sphygmomanometer

Answer

**Step-by-Step Solution:**

1. **Understanding Vital Capacity**: Vital capacity (VC) is defined as the maximum volume of air that a person can inhale after a maximum exhalation. It is an important measure in assessing lung function.

2. **Identifying the Measurement Instrument**: To measure vital capacity, we need a specific instrument that can assess various pulmonary volumes and capacities.

3. **Evaluating the Options**:
- **Spirometer**: This is the correct instrument used to measure vital capacity. It assesses different types of respiratory volumes such as tidal volume, inspiratory reserve volume, expiratory reserve volume, and capacities including total lung capacity and functional residual capacity.
- **Stethoscope**: This instrument is primarily used to listen to heartbeats and is not used to measure lung volumes.
- **Aspirator**: This device is used for suctioning fluids and is not relevant for measuring lung capacity.
- **Sphygmomanometer**: This instrument measures blood pressure and is not related to lung function.

4. **Conclusion**: Based on the evaluation, the correct answer to the question is that vital capacity is measured with a **spirometer**.

**Final Answer**: Vital capacity is measured with a spirometer.

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