What's the quickest and most effective way of removing food from the windpipe in an emergency room setting?

Question

The Heimlich maneuver is well-known as a way of ejecting food and other obstructions from the windpipe, yet it is not always effective. If someone began choking on food in the best possible environment, in an emergency room or even on an operating table, with no particular choice of food for this question, what would be the best alternative to the Heimlich maneuver to clear it?