Effect of bronchodilator therapy on the function of external respiration and lung parenchyma in surgical treatment of patients with non-small cell lung cancer combined with chronic obstructive pulmonary disease

Abstract

The purpose of the study was to compare the efficacy of regular prolonged inhalation therapy with tiotropium bromide delivered via the Respimat inhaler and short-acting bronchodilator (SAB) therapy with ipratropium bromide/fenoterol in the perioperative period in patients with non-small cell lung cancer (NSCLC) combined with chronic obstructive pulmonary disease (copd).Material and Methods. The study included 66 patients with Nsclc and copd. The patients received tiotropium bromide, 5 mcg/day (TB group) or a combination of ipratropium bromide/fenoterol 20/50 mcg/dose, 2 doses 4 times a day (SAB group) for 6 weeks before and 6 weeks after surgery. The control group consisted of patients who did not receive bronchodilators before surgery, but they received a combination of ipratropium bromide/fenoterol in the postoperative period. All patients underwent tests of pulmonary function (spirometry, body plethysmography), measurement of lung parenchyma density and emphysematous lung areas (high-resolution computed tomography).Results. After preoperative preparation with use of tB or saB, there was a significant improvement in FEV1, FVC, VC, RV, ITGV, and. RV/TLC ratio relative to baseline. In the tB and sad groups, a significant reduction in the severity of total respiratory resistance (Rtot) compared to that in the control group was observed. According to the assessment of lung density and the volume of emphysematous areas on expiration, the results in the TB group were significantly better than those in the sad and control groups. six weeks after surgery, all patients showed a significant decrease in post-FeV1, post-FVC, and post-VC relative to the preoperative values. Bronchodilator therapy resulted in the reduction in Rtot in all groups; however, better results were achieved in the TB group (86 %) compared to sad group (93 %, p=0.03) and control (101.5 %, p=0.02). After surgical treatment, a decrease in the volume of emphysematous areas on inspiration was observed: the parameters were better in the TB group than in the sad and control groups (220 cm3 versus 1025 cm3 and 1002 cm3, p<0.001 and p=0.002, respectively).Conclusion. In patients with Nsclc and copd, longterm inhaled bronchodilator therapy can significantly improve respiratory function. more beneficial results are achieved after using long-acting drugs (tiotropium bromide).