Predictors of conversion to thoracotomy for video-assisted thoracoscopic lobectomy: a retrospective analysis and the influence of computed tomography-based calcification assessment.
OBJECTIVE
Conversion to an open thoracotomy during video-assisted thoracoscopic surgery lobectomy is reported to occur in up to 23% of cases and can be associated with increased morbidity. We developed a preoperative computed tomography calcification score based on anatomic location and extent of calcifications to evaluate the ability to predict video-assisted thoracoscopic surgery conversion.


METHODS
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. We then compared outcomes among patients undergoing video-assisted thoracoscopic surgery, converted video-assisted thoracoscopic surgery, and planned open thoracotomy.


RESULTS
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.


CONCLUSIONS
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.
Division of Thoracic Surgery, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA.
Pamela
P
Samson
Julian
J
Guitron
Michael F
MF
Reed
Dennis J
DJ
Hanseman
Sandra L
SL
Starnes
D000368:Aged; D002114:Calcinosis / Q000000981:diagnostic imaging* / Q000401:mortality / Q000601:surgery*; D015897:Comorbidity; D005260:Female; D006801:Humans; D016015:Logistic Models; D008175:Lung Neoplasms / Q000000981:diagnostic imaging* / Q000401:mortality / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011013:Pneumonectomy; D013902:Radiography, Thoracic; D012189:Retrospective Studies; D012307:Risk Factors; D020775:Thoracic Surgery, Video-Assisted; D013908:Thoracotomy; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome