A chest drain, also known as a chest tube, is a medical device used to remove air, fluid, or pus from the space around the lungs. This procedure is often necessary after surgeries, injuries, or conditions like pneumothorax or pleural effusion. The drain is inserted through the chest wall and connected to a collection system, allowing for continuous monitoring and drainage. The chest drain helps restore normal breathing and lung function by preventing pressure buildup in the chest cavity. It is typically managed by healthcare professionals in a hospital setting, ensuring that patients receive appropriate care and monitoring during the drainage process.