Compassionate/Emergency exit visa?

Hello, I am helping a U.S. citizen friend who lives in Shanghai, China on a work Z. Her sister is in the States, in the hospital critically ill with a poor prognosis. My friend is in the process of her Z renewal and has surrendered her passport as part of that process, which could take another 3 weeks, but she really needs to get back to the States as quickly as possible. Is there any such thing as a compassionate visa or passport that would allow her to travel to the United States, see about her sister and return to her job in China? Thank you!