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Ann Thorac Surg 2005;79:1167-1173
© 2005 The Society of Thoracic Surgeons
a Department of Thoracic and Cardiovascular Surgery, The Cleveland Clinic Foundation, Cleveland, Ohio
b Department of Quantitative Health Sciences, The Cleveland Clinic Foundation, Cleveland, Ohio
Accepted for publication August 30, 2004.
* Address reprint requests to Dr Murthy, Department of Thoracic and Cardiovascular Surgery, The Cleveland Clinic Foundation, 9500 Euclid Ave/Desk F24, Cleveland, OH 44195 (E-mail: murthys1{at}ccf.org).
BACKGROUND: Air leak after pulmonary resection is a common occurrence that is incompletely characterized. Our objectives were to determine prevalence of air leak and identify its risk factors, characterize its duration and discover its correlates, and evaluate its clinical importance.
METHODS: Air leak was studied in 319 patients undergoing isolated anatomic lobectomy between January 1998 and July 2001. Risk factors for air leak were identified by logistic regression of patient characteristics, indications for lobectomy, lobe resected, and fissure management. Factors associated with air leak duration were sought by time-related analysis. Association of complications with air leak was evaluated by propensity-matched pairs analysis.
RESULTS: Prevalence: Air leak prevalence was 58% (186 patients). It occurred less frequently after left lower lobectomy (p < 0.0001) and later in the series (p = 0.008). It was surgeon dependent (p = 0.007) but not associated with forced expiratory volume in 1 second. Duration: The 10th, 50th, and 90th percentiles of air leak duration were 1.6, 3, and 7 days, respectively. No factors, including fissure management, were reliably associated with air leak duration. Importance: Air leak was associated with more complications (30% vs 18%, p = 0.07) and protracted hospital course (p = 0.02).
CONCLUSIONS: Postoperative air leak is a common occurrence after lobectomy, but fortunately it is self-limiting in most patients. Air leak is independently associated with longer hospital stay and other postoperative complications. Surgical technique is important and may be the only modifiable factor.
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