My father is 87 years old, and suffers from vascular dementia, in the last few months, things are deteriorating quite rapidly, but for the last month, he has severe amounts of phlem and coughing, he is a smoker and doesn t move around hardly at all. What can be done, my mother seems to not think that this is reason for concern. He has also been permanently catheterized for over a year. What can I do to help??