When you see someone who can't breathe you panic, so even IF a staff would want to do CPR he/she could entered into a state of shock of wanting to do something but your body not responding. You have no idea what you would do until you're in the situation regardless of what you say or think. A guy who was stabbed entered where I worked gushing blood out and I simply stood there. My mind was racing but i just couldn't move. I know staff who truly care for their patients there.