Hi,I also had this done but it was done at home,I went in at 7 in the evening and had to be wired up to a small box which went under your clothes,you have some tubes up your nose Which you don't actually have to put on until u are settled in bed,and a clip on your finger which again you put on when you go to sleep.I had to take it off in the morning when I got up and return it to the ward before 12am,simple and no problems at all