At the end of anesthesia it's important to avoid residual neuromuscular block to ensure adequate respiratory function preventing postoperative pulmonary complications. This trial compares the neuromuscular block reversal with different drugs (sugammadex vs neostigmine) after thoracic anesthesia. The trial main objective is to demonstrate that sugammadex is faster than neostigmine to reach a Train-of-four-Ratio (TOF-ratio) of 0.9 after thoracic anesthesia, demonstrating that sugammadex allows a faster extubation. Other main purpose is to verify if there is a difference between sugammadex and neostigmine as regards adverse events after extubation and in the postoperative period (until the 30th day after surgery).