It seems that you have been under general anesthesia. During general anesthesia, a needle of white liquid like milk is usually given first, and then you fall asleep immediately, and then general anesthesia is carried out with anesthetic gas.

Anesthesia must be continued during the operation, otherwise you will feel pain. Your foot surgery takes 1 hour, so anesthesia takes one hour. I don't know if my understanding is correct.

It is also possible that your operation is general anesthesia plus epidural, which may make it difficult for you to play epidural.