Has a surgeon ever opened someone up and realized immediately there was no chance of saving the person?

 Yes, it is possible for a surgeon to open someone up and realize immediately that there is no chance of saving the person. This can happen in cases where the patient has suffered severe trauma or has a terminal illness that cannot be treated surgically. In such cases, the surgeon may make the decision to close the patient back up without completing the surgery, in order to avoid prolonging the patient's suffering or risking further complications.

It's also important to note that in some cases, even before the surgery starts, the surgeon may predict that the patient's condition is not suitable for surgery, and in such cases, the surgery may not be performed.

It's a difficult decision for surgeons to make and it is done after careful examination and consideration of the patient's condition and the chances of success. The priority for the surgeons is always the well-being of the patient and providing the best possible care.