When is suction typically added to a chest drainage system?

• A. All of the above
• B. Persistent air leak
• C. Need to drain fluid more effectively per clinician orders
• D. Incomplete lung re-expansion

Answer: (A)

Adding suction to a chest drainage system is done when gravity drainage alone isn’t enough to remove air or fluid and when the goal is faster lung re-expansion or more efficient drainage. If there’s a persistent air leak, suction helps evacuate air more quickly and maintain a gradient that encourages the lung to re-expand, while also reducing the amount of air that escapes into the pleural space. When the lung isn’t fully expanding, suction provides a stronger pull (negative pressure) to help bring the lung back toward the chest wall and close the pleural space. If the clinician wants drainage to occur more rapidly, suction can boost the rate of fluid removal, which is especially useful for large or thick effusions. Because these situations all represent scenarios where suction can enhance outcomes, all of these are valid indications to add suction.