The anaesthetist gives you the lowest dose and then adds to it more and more until your sedated before they start anything at all. nothing at all happens until you are already sedated, the injections don’t go into your chest until they know your sedated and pain free. The anaesthetist will come in and talk to you about it all and it will make you feel at ease, she will explain how nothing will be done until you are sedated and pain free, you won’t know what’s going on around you and you will more than likely go to sleep, they monitor you throughout the whole surgery to make sure you stay sedated and it feels like you have been asleep. Honestly it is nothing at all to worry about xxx