What instrument is used to measure lung volumes during breathing?

Correct option is C

Correct answer: (c) Spirometer

Explanation:

• A Spirometer is a medical instrument used to measure lung volumes and capacities during the process of inhalation and exhalation.
• It is commonly used to:
• Diagnose lung diseases like asthma, COPD (Chronic Obstructive Pulmonary Disease)
• Monitor respiratory health
• Evaluate pulmonary function

Information Booster:

• The test performed using a spirometer is called spirometry.
• It measures key parameters like:
• Tidal Volume (TV) – Normal breath volume
• Vital Capacity (VC) – Maximum air expelled after a deep breath
• Forced Vital Capacity (FVC)
• Forced Expiratory Volume (FEV1)

Additional Knowledge:

• (a) Respirometer – A general term, often confused with spirometer, but not a standard instrument for clinical lung volume measurement.
• (b) Sphygmomanometer – Measures blood pressure.
• (d) Barometer – Measures atmospheric pressure, not lung function.