Predictors of conversion to thoracotomy for video-assisted thoracoscopic lobectomy: A retrospective analysis and the influence of computed tomography–based calcification assessment
The Journal of Thoracic and Cardiovascular Surgery, 06/15/2012

Samson P et al. – Calcification score based on the location and degree of calcifications can predict the increased likelihood of video–assisted thoracoscopic surgery conversion. This scoring system could be one element used to choose the approach for a lobectomy, especially during a surgeon’s learning curve.

• Patients undergoing planned video–assisted thoracoscopic surgery lobectomy between 2003 and 2009 were identified.
• Baseline demographics, comorbidities, operative data, and postoperative outcomes were reviewed.
• Preoperative chest computed tomography scans were examined by an attending thoracic surgeon.
• Calcifications were scored from 0 (none) to 6 (major hilar calcifications at the resection bronchus).
• Preoperative patient and tumor characteristics and the calcification score were analyzed for their ability to predict conversion.
• They then compared outcomes among patients undergoing video–assisted thoracoscopic surgery, converted video–assisted thoracoscopic surgery, and planned open thoracotomy.

• Of the 193 patients undergoing planned video–assisted thoracoscopic surgery lobectomy, 148 (77%) had a completed video–assisted thoracoscopic surgery lobectomy, and 45 (23%) underwent conversion to thoracotomy.
• The calcification score was found to independently predict video–assisted thoracoscopic surgery conversion.
• Patients who were converted to a thoracotomy had significantly higher 30–day mortality, more atrial arrhythmias, increased blood loss, longer operative time, and increased length of stay compared with those who underwent completed video–assisted thoracoscopic surgery lobectomy and longer length of stay compared with those undergoing planned open lobectomy.