Management of Bubbling in Chest Tubes

Understanding Bubbling in Chest Tubes

Bubbling in the water chamber of a chest tube indicates air in the pleural space, suggesting a condition such as pyopneumothorax, with continuous bubbling indicating a continued visceral pleural air leak 1
The respiratory swing in the fluid in the chest tube is useful for assessing tube patency and confirms the position of the tube in the pleural cavity, helping in the management of patients with chest drains 1

Never clamp a bubbling chest drain as this can convert a simple pneumothorax into a life-threatening tension pneumothorax, emphasizing the importance of proper chest tube management 2
Ensure the underwater seal bottle is kept below the level of the patient's chest at all times to prevent complications such as fluid backflow into the pleural space 1
Verify that the drainage system is functioning properly with unidirectional flow of air or fluid out of the chest, and check that the tube is not kinked, blocked, or malpositioned 1

If suction is used, it should be applied via the underwater seal at a pressure of 5–10 cm H2O to reduce the likelihood of the drain becoming blocked with debris 1
Suction should be supervised by appropriately trained nursing staff to ensure proper management and to prevent complications 1

Patients with chest drains should be managed on specialist wards by staff trained in chest drain management, with daily reassessment of the amount of drainage/bubbling and respiratory swing 3
Monitor for signs of complications such as surgical emphysema, infection, or respiratory distress, which can arise from improper chest tube management 2

In pneumothorax management, a bubbling chest drain indicates an ongoing air leak and should never be clamped, while in pleural effusion management, the drain may be clamped for specific purposes under close supervision 1
Larger tubes may be necessary if there is a persistent air leak, although there is no evidence that large tubes are better than small tubes in the management of pneumothoraces 2

Limit initial drainage to 10 ml/kg body weight, then clamp the drain for 1 hour if not bubbling, and in adults and larger children/adolescents, no more than 1.5 liters should be drained at one time or drainage slowed to about 500 ml/hour to prevent re-expansion pulmonary edema 1

Water seal can be used immediately after tube placement without initial suction application, as recommended by the American Thoracic Society, in patients undergoing VATS, to reduce chest tube duration and hospital length of stay 4, 5

A bubbling chest drain indicates ongoing air leak and must never be clamped, as this can convert a simple pneumothorax into life-threatening tension pneumothorax, according to the British Thoracic Society 6, 7

The American College of Chest Physicians recommends chest tube removal when there is no air leak present, drainage is less than 1 mL/kg/24 hours, and complete radiographic resolution of pneumothorax is achieved, typically within 48-72 hours after VATS 4, 6, 8
The Infectious Diseases Society of America suggests that chest tube removal criteria should include discontinuing any suction first, confirming no clinical evidence of ongoing air leak, and obtaining a confirmatory chest radiograph 4, 8