Indications to Convert Chest Tube Thoracostomy (CTT) to Thoracotomy
Convert chest tube thoracostomy to open thoracotomy immediately for uncontrollable bleeding, injury to structures not amenable to thoracoscopic repair, and acute intolerance of single-lung ventilation. 1
Universal Immediate Indications for Conversion
The following represent absolute indications requiring immediate conversion from any minimally invasive approach to open thoracotomy:
- Uncontrollable bleeding that cannot be managed through the chest tube or thoracoscopic approach 1
- Injury to major structures (vessels, airways, esophagus) that are not amenable to thoracoscopic repair 1
- Acute intolerance of single-lung ventilation during attempted VATS procedures 1
Context-Specific Indications
For Empyema Management
When chest tube drainage fails to achieve the two fundamental goals of empyema therapy—complete evacuation of infected material and lung re-expansion—conversion to thoracotomy should be strongly considered. 1
Additional empyema-specific conversion considerations include:
- Lack of surgical progression during attempted VATS, though no specific time limit is defined in the literature; surgeons must use individual judgment regarding what constitutes failure to progress "in a timely fashion" 1
- Failure to achieve adequate clearance of infected material and lung re-expansion, which are the primary therapeutic goals 2
- Stage III (chronic) empyema with thick fibrous peel and trapped lung, where pleural drainage procedures are no longer effective and decortication is required 1
For Trauma Management
For blunt chest trauma, the traditional high-volume chest tube output thresholds may not apply; a 1-hour chest tube output exceeding 404 mL has 87.5% sensitivity and 96.8% specificity for predicting need for thoracotomy. 3
Key trauma-specific indicators include:
- Initial chest tube output >404 mL in the first hour after placement in blunt trauma patients 3
- Persistent hemorrhage despite adequate chest tube drainage 3
- Retained hemothorax requiring surgical evacuation after failed tube thoracostomy 4
Important Clinical Caveats
Conversion Rates and Surgeon Experience
- Published conversion rates from VATS to thoracotomy range widely from 0% to 41%, with the largest series reporting 11.4% 1
- Surgeon experience significantly influences both the decision to attempt VATS and the threshold for conversion, with less experienced surgeons appropriately converting earlier 1
- No preoperative factors (including previous cardiac or thoracic surgery) reliably predict which patients will require conversion 1
Pediatric Empyema Considerations
- In pediatric empyema, open thoracotomy achieves normal body temperature in 73.3% and normal respiratory rate in 66.7% of patients within 48 hours, compared to 40% and 20% respectively with closed tube thoracostomy 5
- Average tube duration is significantly shorter with open thoracotomy (7.5 days) versus closed tube thoracostomy (13.8 days) in children 5
- Pleural fluid pH <7.2 predicts longer tube drainage duration and may influence the decision for earlier surgical intervention 5
Approach Selection Priority
VATS should be considered the first-line surgical approach over thoracotomy when surgical intervention is needed, as it results in less postoperative pain, shorter hospital stays, and fewer complications while maintaining similar mortality and re-intervention rates. 2
However, the selected technique must facilitate optimal clearance of infected material and achieve lung re-expansion where appropriate 2. When these goals cannot be achieved thoracoscopically, conversion to thoracotomy is warranted 1.