When discontinuing life support and donating all organs, it doesn't happen as they showed. There is no "turn off the machines" moment, and death isn't declared until the last organ (the heart) is removed. This happens in the operating room/theatre (OR) where there won't be any family present for it. This is vital for the viability and survival of the donated organs.
When Scarlett was walking beside her mother as it was being wheeled (assuming to the OR), it seemed as though they were going to do this right and portray it factually, but then they turned off the monitor and disconnected her breathing tube.
When Scarlett was walking beside her mother as it was being wheeled (assuming to the OR), it seemed as though they were going to do this right and portray it factually, but then they turned off the monitor and disconnected her breathing tube.