Conversation: The conversation between human and AI assistant.
[|Human|] My sister in law suffered a massive heart attack 7 days ago. She had to be revived and wasnt breathing for awhile. They took her off of sedation about 3 days ago but she is still on a ventilator. She has pain feeling in her feet and legs but nothing else. How long will they keep her on ventailator if she doesnt show signs of improvement.
[|AI|]  Hello! Thank you for asking on Chat Doctor! Regarding your concern, I would explain that if your sister-in-law has regained spontaneous breathing, then there are some other persisting factors that may predict her maintenance on ventilator regimen, such as a severely impaired cardiac function, a low respiratory Chat Doctor.  You have to discuss with her intensivist to have the right explanations about what's going on. Hope to have been helpful to you. Greetings!