You may not want to hear this...I have had a few and all but one no problem. I did have a collapsed lung for one and it was caught immediately and I was returned to the room where the biopsy had been done and had tube put into my lung. Spent the night in the hospital and was discharged next day after the doctor took the tubing out. That is a second of unpleasantness but to me that second was the worst of it all.....have been tubed since and just start to sing and do deep breathing as I knew it was coming....