I've had it come up a few times where I didn't consent pre-op for TAP block but surgery takes an unexpected course and now they have an unanticipated abdominal incision and the patient really could benefit from a TAP block prior to emergence at this point. Is it reasonable to perform the block? They are so safe, I do them under GA anyway, and the benefits if the person has significant chronic pain issues would be potentially great. I don't want to have to wait until they're awake and in agony before performing it just to get consent because it would ruin the success of the block with a patient who can't sit still.