How long after someone loses foot pulse do they die?

My grandmother is dying of ovarian cancer. Her kidneys have almost stopped. She is not having a bowel movement. Her toe nails and feet are blue. Now she’s lost the pulse in her feet. How much longer does she have?

it different with each person you can never tell so just dont let them live their life with regret have them have fun the timethat you are with them so dont leave this world unhappy