Sinai opens new unit for short hospital stays Apr 26, 2019 | Hospitals, Top Stories Sinai Health System launched a hybrid, short-stay observation unit this week at Mount Sinai Hospital in Chicago for short-term patients who need 72 hours or less of care.To access this content, you must purchase 1 Year Health News Illinois Subscription or 1 Year Group Subscription - Up to 5 Users, or log in if you are a member.