When one of my grandmothers got up in years she requested a DNR because her sisters and brother, grandpa and many of her friends were already gone. Perhaps it's just a person being ready to go and not wanting heroic measures taken.
It seems that going forward to put a DNR in place that a person's wishes should be followed. At the end, with my dad, even though he had a DNR and was clearly of sound mind though failing body, he reiterated his wishes to the doctor who then had to meet with one of us kids (me, as it turned out) to make sure dad really, really wanted this. Dad's DNR was something he updated every few months in his last three years of life but it was still questioned when it got to that point.
It seems that going forward to put a DNR in place that a person's wishes should be followed. At the end, with my dad, even though he had a DNR and was clearly of sound mind though failing body, he reiterated his wishes to the doctor who then had to meet with one of us kids (me, as it turned out) to make sure dad really, really wanted this. Dad's DNR was something he updated every few months in his last three years of life but it was still questioned when it got to that point.
I'm your huckleberry.