Physician here with ER experience (and IT too). I think it's quite realistic, except the relatives being in the ER room, giving orders to nurses. But that might be different in other hospitals and countries.

The reason for the edema is not given, perhaps cardiac insufficience, perhaps she didn’t take her pills (it is mentioned that she had dementia). Anyway, it’s possible that treatment has already been done but would take a few hours to fully set in, with the relatives impatiently waiting and seeing no improvement.

Explaining medical things to patients and relatives is difficult and a subject on its own in medschool. In extraordinary circumstances and without being able to do much on their own, people filter things they are told to what they want to hear. Sometimes you get feedback on what the patient understood, it's surprising and also the potential base of a lawsuit. There is a reason that you have to document so many things in writing. So I think it’s a smart idea to use AI to generate simple-language messages that are easily understood. It doesn’t matter if the medical content of the text is 100% correct, the message here is: ”Calm down, stand back, I handle this”.