There were complications in surgery, and your chest has gone empty. All the things there weren’t time for. The things that could’ve been done, said.
The nurse at her station talks quietly on the phone, smiling behind her hand. It’s a personal conversation, perhaps with one of her loved ones, and she’s careful to not show too much happiness.
She sees you and knows the situation.
Complications. We don’t know right now. Touch and go.
All the clichés, but straightforward is how these medical types tell it. It’s inherent in the word.