I thought this would be easier to find than it is ...

A cancer nurse wants (reports has read somewhere) physical
signs and symptoms of immanent death ... perhaps a "scale"
relating to multisystem organ failure ...what happens in
the last few minutes of life  ...

what a nurse can see physically ...

Most of the literature I have found is either on (1) helping
a patient with the psychological stages of confronting death or
(2) the physiology of multisystem organ failure

Michelynn McKnight, Health Sciences Library, Norman Regional Hospital