If you visit an ED at the weekend, the resident physician who deals with you may have been on shift without a break for 36 hours. And now she's going to stick an instrument in you or prescribe medications.
FWIW, that's progress: in my day we'd start on Saturday morning and remain on duty until Monday afternoon- a 56-hour shift. We did that every second weekend while still working Monday-to-Friday with one or two of those weekdays being 32-hour shifts as well.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
