Where should there be intermittent bubbling on a chest tube?

Where should there be intermittent bubbling on a chest tube?

• A. Water-seal chamber
• B. Suction control chamber
• C. Chest tube insertion site
• D. Suction tubing connections

Answer: (A)

Intermittent bubbling should be seen in the water-seal chamber. This chamber acts as a one-way valve that lets air escape from the pleural space during breathing while preventing air from flowing back into the chest. The amount of air moving through the seal changes with respiration and coughing, so bubbles appear intermittently instead of continuously. This pattern suggests the chest tube is evacuating air and the system is functioning. In contrast, continuous bubbling is expected in the suction control chamber when suction is applied, and the insertion site or suction tubing connections should be tight with no bubbling indicating leaks at those points.

Intermittent bubbling should be seen in the water-seal chamber. This chamber acts as a one-way valve that lets air escape from the pleural space during breathing while preventing air from flowing back into the chest. The amount of air moving through the seal changes with respiration and coughing, so bubbles appear intermittently instead of continuously. This pattern suggests the chest tube is evacuating air and the system is functioning. In contrast, continuous bubbling is expected in the suction control chamber when suction is applied, and the insertion site or suction tubing connections should be tight with no bubbling indicating leaks at those points.