👉 Manometry is a medical test that measures how much air is inhaled, exhaled, and breathed out. It helps doctors understand if a person has a respiratory problem, such as asthma or chronic obstructive pulmonary disease (COPD). Manometers are often used to measure the amount of oxygen and carbon dioxide in the air, which can be crucial for diagnosing conditions like heart failure, lung disease, or other respiratory problems.