Pulmonary edema
fluid accumulation in the air spaces and parenchyma of the lungs / From Wikipedia, the free encyclopedia
Pulmonary edema (pulmonary oedema in British English) is fluid in the lungs ("Pulmonary" means "lungs"; "edema" means "swelling" or "fluid"). Normally, the lungs fill with air when a person breathes in. From the alveoli in the lungs, oxygen goes into the blood. The blood then carries oxygen to the entire body. Every part of the body needs oxygen to survive.
When a person has fluid in their lungs (pulmonary edema), there is not enough space left for air to get into the lungs. The person will not be able to breathe in as much air. This means not as much oxygen will get into the blood, and the body will not get the oxygen it needs.[1]