Breathing Tube-Free lung surgery: does it harm the diaphragm?

This study looks at how often the diaphragm (the main breathing muscle) stops working properly after lung surgery done without a breathing tube. About 120 adults having this type of surgery will have their diaphragm checked with ultrasound right after surgery and again 24 hours later. The goal is simply to measure how common this problem is, not to test a new treatment.