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You have been tested to see how well your lungs are working.

The lungs are on the left and right side of the ribcage. They are also connected to the nose and mouth via the bronchial tubes and windpipe (trachea). You need lungs to breath. When we breathe in, oxygen enters the lungs and accumulates in the blood. This blood then flows to the heart. The heart then pumps the oxygen-rich blood throughout the body. All of the organs are supplied with oxygen as a result.

For the examination, the patient sits in a glass enclosure and, with their nose blocked off, breathes through a mouthpiece. This examination also often involves the patient breathing out a lot of air very quickly, all at once. A measuring device is attached to the mouthpiece that the patient breathes through. This device measures, for example, how the air flows and how the pressure changes as the patient breathes. The device then calculates certain values. These values can then be used to assess how well the lungs are working.