Most patients with NDI
have normal thirst mechanisms. They can prevent substantial increases in blood sodium by drinking sufficient water, which most can, although many run slightly high sodium
levels anyway. Rarely, patients with NDI
who have had severe hypernatremic dehydration
may have damaged their thirst center in the brain, and may have problems regulating their own water intake. More commonly, the problem with drinking enough water is simply access. Infants in a crib cannot freely access water, no matter how thirsty, unless they are provided with water bottles. Similarly, our society frequently runs on a regimental schedule that assumes water breaks do not need to occur frequently. Education and accommodation
are the best solutions to those problems.