Ehhhhh, I don't really think anyone should be asked to work into the evening unannounced. Sure the stakes at hospitals are high, but that's all the more reason staff shouldn't be stressed, overworked, or distracted. The 40th time you ask your anesthesiologist to work late and put their child in night care from 5-9pm, they're gonna be pretty resentful, and rightly so. Do you want a resentful anesthesiologist? I sure don't.