I wouldn't say that its the cvvhd that makes these guys 1:1's. In our unit it's all the other hoopla of instability, maxed on drips... you bring the crash cart into the room to do a code brown, look at them for a second too long and their pressure is in the toilet that makes them cvvhd, not HD.
Reminds me of when IABP's were 1:1 mandated, until we saw sicker and sicker patients, and it was suddenly "doable" to pair a pump with the most stable r/o MI, then the next day it seemed you had a vent with a pump... then the manager says... well this pump is stable and you're weaning him... let's pair him with the other pump...
I think a huge part of this is that slippery slope where once we become more skilled in our time management with sicker and sicker patients.. we're asked to take on more and more... Until what was considered obscenely unsafe a year ago is now common practice. You look back and think how the heck did this happen?
It makes you wonder why nursing school requirements now don't mandate that you have 4 extra arms surgically implanted to be able to handle the workload. Meanwhile administration has the aerosol valium spray that dispenses Q5 minutes to keep the staff "happy".
Sorry, diving off topic here rapidly. I REALLY sense your concern...

Where will this STOP? How much more can we do and provide the care that we need to give. There are SO many patients that need to be 1:1's and are not.
I'M WITH YOU! Sick enough for cvvhd, you're a 1:1 until the Hd nurse shows up for regular dialysis.
Again sorry for the rant and rave