The instrument that helps in clinical assessment of pulmonary functions is

Options

A. Spirometer
B. Sphygmomanometer
C. Voltmeter
D. Ammeter

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the instrument used in the clinical assessment of pulmonary functions.

2. **Review the Options**: The options provided are:
- Option 1: Spirometer
- Option 2: Sphygmomanometer
- Option 3: Voltmeter
- Option 4: Ammeter

3. **Analyze Each Option**:
- **Option 1: Spirometer**: This instrument measures the ventilation, which is the movement of air in and out of the lungs. This is directly related to pulmonary functions.
- **Option 2: Sphygmomanometer**: This device measures blood pressure, which is not related to pulmonary function.
- **Option 3: Voltmeter**: This instrument measures the voltage or potential difference between two points, which is unrelated to pulmonary functions.
- **Option 4: Ammeter**: This device measures the current flowing through a circuit, which also does not pertain to pulmonary functions.

4. **Conclusion**: Based on the analysis, the only instrument that is relevant to the clinical assessment of pulmonary functions is the spirometer.

5. **Final Answer**: The instrument that helps in clinical assessment of pulmonary functions is the **spirometer**.

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