Chest decompression is a medical procedure used to relieve pressure in the chest cavity. This pressure can result from conditions like pneumothorax, where air leaks into the space between the lung and chest wall, or from fluid accumulation due to pleural effusion. The goal is to restore normal lung function and improve breathing. During chest decompression, a healthcare provider may insert a needle or tube into the chest to remove excess air or fluid. This process helps to expand the lung and alleviate discomfort. It is often performed in emergency situations to stabilize the patient before further treatment.