That's how a lot of actual medical devices work. I worked on an anesthesia machine where the control systems were implemented with micro controllers and RTOS.

That's how a lot of actual medical devices work. I worked on an anesthesia machine where the control systems were implemented with micro controllers and RTOS. The UI was Windows Embedded running on a separate x86 board and the whole thing would still safely operate even if the UI subsystem crashed. There were completely mechanical backup controls too.