I don’t understand why you didn’t like the word "medbrother".
Because of the circumstances, I often roll around the hospitals, there are nurses and nurses, the functions are the same, and no one is absolutely scared.
No, the kind of “sister” has, ultimately, subtypes: a procedural nurse, an operating nurse, a senior nurse - straight with a separate cabinet and a tablet... Although it would be fun to see the cabinet with the inscription “Oldest Brother”, yes :)
It is funny to you, healthy, and unpleasant to the sick, if you are honest. Just for humorous people like me.