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Ann Thorac Surg 2000;69:388-393
© 2000 The Society of Thoracic Surgeons

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Original Articles

Relationship between amount of lung resected and outcome after lung volume reduction surgery

^a Division of Pulmonary and Critical Care Medicine, Thoracic Surgery, University of California Irvine Medical Center, Orange, California, USA
^b Beckman Laser Institute, University of California, Irvine, California, USA

Address reprint requests to Dr Brenner, Division of Pulmonary and Critical Care Medicine, University of California Irvine Medical Center, Orange, CA 92668
e-mail: mbrenner{at}bli.uci.edu

Background. Lung volume reduction surgery (LVRS) is being actively investigated for palliative treatment of severe emphysema. Considerable focus is directed toward patient selection and outcomes of LVRS. However, there is little information available regarding surgical methods to guide optimal extent of resection. We hypothesized that acute improvement and long-term survival after bilateral staple LVRS would be related to the extent of tissue resected.

Methods. The relationship between acute improvement in forced expiratory volume in 1 second and forced vital capacity was examined as a function of the total grams of lung tissue resected in 237 patients who underwent bilateral staple LVRS by a single group of surgeons. Overall survival was assessed based on extent of resection by quartiles of tissue weight resected using Kaplan-Meier survival methods.

Results. Improvement in forced expiratory volume in 1 second and forced vital capacity correlated with extent of tissue resected (p < 0.01), although there was considerable variability to individual response (r = 0.3). In contrast, there was no apparent relationship between the amount of tissue resected and overall postoperative survival (p = 0.7).

Conclusions. There is a correlation between the amount of tissue resected and improvement in forced expiratory volume in 1 second and forced vital capacity after bilateral staple LVRS, with generally greater postoperative improvement after larger volume resections. However, there does not appear to be greater long-term survival with larger volume resections despite greater improvement in spirometry. This study suggests that factors other than improvement in spirometric variables may govern optimal LVRS resection volumes and long-term outcome. Future studies will clearly be needed in this important area of LVRS emphysema research.

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