dear, this is a critical condition as your father is aged and might be in a condition of mental shock due to fear of death. such situation demands extremly sensitive and sympathetic management along with medical management.you need to consult psychiatrist, psychologist and a general physician. his haemoglobin is low, this can also result in to impaired mental functioning.your father requires iron injections and diet rich in iron like grean leafy vegetable, coarse cereals, jaggery,milk and egg. simultaneously your mother also needs emotional support at this hour.she needs a company to speak to.and same time you need to be strong.i wish good health to your family.