That's a little bit different and not as detrimental though. It's actually an incentive for nurses because they get to work fewer days. Instead of doing 10 8 hours shift every two weeks they'll do 6 12 hours and basically get 8 days off every 2 weeks, which is pretty interesting from a free time perspective.
My gf did both and while she was tired after 12 hours, overall I think she preferred it.