At this time, Correctional Service Canada has a very specific management program for persons who are put into isolation. From the time a person is placed in isolation not only is she in her own cell—there are never two people in the same cell—, but a guard is present who makes rounds about every ten minutes. Furthermore, a corrections officer must make a daily evaluation of the inmate's condition.
I thought at first that you were talking theoretically, but it is possible that this is actually going on in prisons in Canada. That is my understanding. This would be the ideal situation, but you cannot tell us if it is not already implemented in some federal institutions.