[mcv]

> If a doc is on an 8-hour shift (hypothetical; I doubt any docs are so lucky!)

But that's a big part of the problem already. It shouldn't be luck to have an 8 hour shift, it should be standard. And of course there may be times when circumstances demand you deviate from that standard, but if you start with 12 hour shifts, you already start wrong, and it can only get worse.

[kelnos]

I think we're deviating from the point I was trying to address. The length of the shift isn't relevant, what's relevant is that different patients need different amount of times, and can arrive at any time during a doctor's shift. Based on both of those variables, a single patient can easily require care beyond a single doctor's shift, so saying "getting done with your current patient and then leaving should never lead to a 12-hour shift" doesn't really make sense, since that "current patient" could have arrived during hour 6 of your shift and then required a 6 hours of attention before being discharged. If you believe that doctor-patient continuity is more important than a doctor's rest, then you can easily justify any shift length up to the point where the doctor falls over.