Management of Chest Tubes: Best Practices for Maintaining Patency
When a chest tube becomes blocked or drainage is inadequate, it should be flushed with 20-50 ml of normal saline to ensure patency. 1 This is the primary intervention for maintaining chest tube function when drainage issues arise.
Identifying Chest Tube Blockage
Signs that indicate a chest tube may be blocked include:
- Sudden cessation of fluid drainage
- Poor drainage despite presence of pleural fluid
- Visible clots or debris in the tube
- Loss of normal respiratory swing in fluid level
Proper Flushing Technique
Preparation:
- Use sterile technique
- Prepare 20-50 ml of sterile normal saline
- Ensure aseptic conditions throughout the procedure 1
Flushing Procedure:
Post-Flushing Assessment:
- Observe for improved drainage
- Monitor vital signs for any adverse reactions
- Ensure proper functioning of the underwater seal drainage system 1
Management of Persistent Blockage
If poor drainage persists after flushing:
Imaging Assessment:
Interventions for Persistent Blockage:
Special Considerations for Small Chest Tubes
Small chest tubes require particular attention as they:
- Are more prone to blockage than larger tubes
- May require more frequent flushing
- Can develop kinks at the skin entry point that require repositioning and redressing 1
Critical Safety Precautions
- Never clamp a bubbling chest tube as this risks a tension pneumothorax 1
- If a chest tube is clamped, immediately unclamp it if the patient develops breathlessness or chest pain 1
- Always ensure the drainage system remains below the level of the patient's chest 1
Maintenance of Drainage System
- Keep the underwater seal bottle below the level of the insertion site at all times
- Keep the bottle upright with adequate water to cover the end of the tube
- Document daily reassessment of drainage amount, bubbling, and respiratory swing 2
Patient and Staff Education
- Patients with chest drains should be managed on specialist wards by staff trained in chest drain management 2
- Educate patients and their families about chest tube care
- Encourage patients to take responsibility for their chest tube and drainage system
- Instruct patients to keep the underwater seal bottle below chest level and report any problems 2
By following these evidence-based guidelines for chest tube management, clinicians can effectively maintain tube patency, ensure proper drainage, and minimize complications associated with chest tube blockage.