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Your lungs have been washed out with a fluid.

When substances such as pus or blood accumulate in certain parts of the body, it can be harmful. To remove such substances, the areas can be washed out with a fluid. The purpose of the fluid is to loosen and absorb the substances. Sometimes the fluid can also contain certain agents. The fluid is then removed once more.

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).

The lungs are usually washed out during a bronchoscopy. To do the bronchoscopy, a tube is inserted into the mouth and pushed down through the trachea into the lungs. A camera is attached to the end of the tube. This camera then sends images to a screen during the examination. It can then be seen whether the tissue is healthy or changed. To wash the lungs out, a fluid is put into the lungs and then sucked back out.