The most patients we can have is 3.... and depending on the patient load, it's very possible to be assigned 3 vent patients.
Our fresh hearts are 'supposed' to be 1:1 for the first 6 hours, but that's not always the case, especially if the heart comes close to shift change. Balloon pumps, prisma, etc.... patients are supposed to also be 1:1.... again, not always the case. It really just depends on what's going on with those patients on whether or not they'll get doubled up, or even tripled.
Level I traumas ideally should be 1:1 as well....especially if they're really unstable.
I think our charge RNs do a really good job of distributing our patients in the safest manner possible, and they even take on a patient if they need to.... and that may not sound like a sacrifice, and I can't speak for days but at night ...... they thoroughly check all the charts and make lists for the nurses on what they think the patients need ordered/dc'd ..... very nice on those nights when you're so busy, the most you get time to do is take a quick peek at the H&P and recent orders/labs..... we're also always on trauma call....and they help out around the unit, doing whatever anyone needs them to help with.....
My favorite nights are 2-3 stable ventilator patients that are all on Norcuron/Morphine/Versed drips.
I also rather enjoy one very unstable patient on lots and lots of drips..... blood products, etc....