so i typically restrict fluids in all cases and if i had a patient with a crit of 22 after giving very little crystal and maybe some colloid then i would transfuse, because i know my iatrogenic hemodilution factor is pretty small but thats anecdotal
obviously these cases are at high risk for vision loss and anemia is a risk factor, id probably treat most of these patients like cardiac patients, no hypotension, maintain crit 28-30