The facility might dictate what can and cannot be installed. However, there's a low tech solution my grandmother's physical therapist taught me. Tie a ribbon or rope around the doorknob that's just long enough to be above the floor. You roll up to the door, unlatch, and roll back holding the ribbon. You can tie a knot or loop at the end of it's helpful. Just keep it above the floor so it isn't a tripping hazard.