An underwater seal helps regulate pleural pressure while limiting the return of air into the chest. Suction can provide additional pressure control through the drainage system when clinically appropriate. Together, these features support continued removal of air or fluid and help maintain conditions that allow the lung to expand rather than permitting air to re-enter the pleural space.
Correct positioning places the tube within the pleural cavity so it can reach the intended air, blood, or fluid. Securement helps keep the tube from shifting after placement, while monitoring can identify inadequate drainage or complications. These safeguards reduce the risk of persistent respiratory compromise, infection, bleeding, or injury to nearby structures.
The material requiring removal helps determine the clinical problem being addressed. Air accumulation is associated with pneumothorax, blood with hemothorax, and other fluid with pleural effusion. Postoperative drainage represents another use. In each situation, evacuation of the pleural contents is intended to relieve the abnormal condition and support restoration of normal lung expansion.
The clinician creates a controlled passage between the ribs, advances the flexible tube into the pleural cavity, and connects it to a drainage system. The tube is then secured and the system configured with an underwater seal or suction when indicated. Subsequent monitoring evaluates drainage, pressure regulation, lung expansion, and possible complications.
Chest tube placement may be used for pneumothorax, hemothorax, pleural effusion, or postoperative thoracic drainage. These conditions differ in whether the pleural space contains air, blood, or other fluid, but each can interfere with normal lung expansion. The procedure provides a means of removing the abnormal contents and addressing associated respiratory compromise.
Monitoring should assess whether drainage is occurring, whether the lung is returning toward normal expansion, and whether respiratory compromise is resolving. Clinicians also watch for infection, bleeding, injury to nearby structures, or problems caused by tube displacement. Careful observation matters because effective drainage depends on both appropriate placement and continued function of the connected system.