In the operating room, you lie on a bed. You see big machines and lights

The sleep doctor puts a sleep mask over your mouth and nose. This mask gives you air that makes you take a nap through the whole surgery. You will wake up only when your surgery is all over. For surgery, stickers stick to your chest. A soft clip or piece of tape holds on to your finger. A soft tube is put on the back of your hand. All the sticky things will come off before you go home.