Whole lung lavage is a medical procedure used to clean the lungs by washing them with a sterile solution. This technique is often employed for patients with certain lung diseases, such as pulmonary alveolar proteinosis, where abnormal substances accumulate in the lungs. During the procedure, one lung is filled with a saline solution, which helps to remove these substances, and then the fluid is drained out. The procedure is typically performed in a hospital setting under general anesthesia. It requires careful monitoring to ensure the patient's safety and effectiveness of the lavage. Whole lung lavage can improve lung function and alleviate symptoms, making it a valuable treatment option for specific respiratory conditions.