cut card

Short simple question. Does the dealer use the necessary cards from the cut off at the last round, or does he end the shoe when he dertermines that theres not enough cards for another round? Or is this done in more that one way?

Let's say you are almost at the end of a shoe. You know the cut card is coming soon. But the count is high and you want to play another round at that count. Perhaps if you have a 13v10, you should suck it up and not hit, in the hopes of playing another round. This seems like it could be...