👉 The empty fluid, also known as pleural effusion, refers to an abnormal accumulation of fluid in the space between the lungs and the chest wall, known as the pleural cavity. This fluid, which is typically clear and thin, serves to lubricate the lung's movement during breathing and helps prevent direct lung tissue from sticking to the chest wall. However, when an excess of fluid builds up, it can impair lung function by reducing the space available for air to move in and out of the lungs, leading to symptoms such as shortness of breath, coughing, and chest pain. The cause of empty fluid can vary widely, including heart failure, lung diseases, infections, and certain medications, and its presence often requires medical evaluation to determine the underlying cause and appropriate treatment.
