I just had an Endoscopy and I think this is what you might be talking about. The last thing I remember is my Doctor putting the knock out drug in my hand and then I woke up and asked the nurse when we were going to get started. He laughed and said, "we are done!" No pain, no fuss. I too have a Hiatal Hernia that needs repair before the lap band can be installed. If the two doctors can get their schedules together both surgeries will be done at the same time and I will only have one hospital stay.