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Ann Thorac Surg 2005;79:1851-1856
© 2005 The Society of Thoracic Surgeons
a Division of Thoracic Surgery, University Hospital, Zurich, Switzerland
b Division of Thoracic Surgery, CHUV, University Hospital, Lausanne, Switzerland
c Department of Surgery, Kantonspital, Chur, Switzerland
d Department of Biostatistics, University of Zurich, Zurich, Switzerland
Accepted for publication December 21, 2004.
* Address reprint requests to Dr Lardinois, Division of Thoracic Surgery, Raemistrasse, 100, University Hospital, CH-8091 Zurich-Switzerland (E-mail: didier.lardinois{at}usz.ch).
BACKGROUND: The role of video-assisted thoracoscopic surgery in the treatment of pleural empyema was assessed in a consecutive series of 328 patients between 1992 and 2002. An analysis of the predicting factors for conversion thoracotomy in presumed stage II empyema was performed.
METHODS: Empyema stage III with pleural thickening and signs of restriction on computer tomography imaging was treated by open decortication, whereas a thoracoscopic debridement was attempted in presumed stage II disease. Conversion thoracotomy was liberally used during thoracoscopy if stage III disease was found at surgery. Predictive factors for conversion thoracotomy were calculated in a multivariate analysis among several variables such as age, sex, time interval between onset of symptoms and surgery, involved microorganisms, and underlying cause of empyema.
RESULTS: Of the 328 patients surgically treated for stage II and III empyema, 150 underwent primary open decortication for presumed stage III disease. One hundred seventy-eight patients with presumed stage II empyema underwent a video-assisted thoracoscopic approach. Of these 178 patients, thoracoscopic debridement was successful in 99 of 178 patients (56%), and conversion thoracotomy and open decortication was judged necessary in 79 of 178 patients (44%). The conversion thoracotomy rate was higher in parapneumonic empyema (55%) as compared with posttraumatic (32%) or postoperative (29%) empyema; however, delayed referral (p < 0.0001) and gram-negative microorganisms (p < 0.01) were the only significant predictors for conversion thoracotomy in a multivariate analysis.
CONCLUSIONS: Video-assisted thoracoscopic debridement offers an elegant, minimally invasive approach in a number of patients with presumed stage II empyema. However, to achieve a high success rate with the video-assisted thoracoscopic approach, early referral of the patients to surgery is required. Conversion thoracotomy should be liberally used in case of chronicity, especially after delayed referral (>2 weeks) and in the presence of gram-negative organisms.
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