Constant bubbling in the water seal chamber indicates what?

• A. Air leak.
• B. Intermittent bubbling.
• C. Normal function.
• D. Obstruction.

Answer: (A)

In a chest drainage setup, the water-seal chamber is designed to let air escape from the pleural space while preventing backflow. Bubbling happens as air moves through the water seal, but it should occur mainly with respiration. If bubbling is constant, it signals an ongoing air leak in the drainage system or at the chest tube site.

So, the best interpretation is that there is an air leak. Inspect all connections and tubing for looseness, disconnections, or cracks, and ensure the system remains closed and properly oriented. A persistent air leak may also reflect a continuing pneumothorax or bronchopleural fistula, which needs medical evaluation.