To evaluate indications for lung volume reduction surgery (LVRS), pulmonary function tests before and 3 months after LVRS were analyzed in 41 patients. Treadmill exercise tests were performed in the 29 patients, and dyspnea was scored with the Borg scale in 22 of these patients. The mean FEV1 increased by 44% after LVRS. Lung volumes were reduced in each subdivision. A significant correlation was found between relief of dyspnea (ΔBorg) and volume reduction, but not between ΔBorg and improvement in FEV1. Residual volume evaluated before the surgery correlated significantly with ΔBorg. These results suggest that alleviation of lung hyperinflation is the most important factor for the relief of dyspnea, and that evaluation of lung volume is necessary to determine if LVRS is indicated a pre-operative residual volume of 250% of the predicted value or more seemed to be an optimal standard for selecting candidates.
|Number of pages||4|
|Journal||Japanese Journal of Thoracic Diseases|
|Publication status||Published - 1997 Dec 1|
- Residual volume
ASJC Scopus subject areas
- Pulmonary and Respiratory Medicine