Thank you for posting your query.
I can understand the discomfort your mother is going through, because of pain and breathing difficulty. I can also understand the dilemma you and family members are facing.
It is important to keep your mother pain-free and comfortable. From that point of view, adequate oxygen supply is important. This should be given by oxygen mask
Putting her on ventilator through throat tube is against the "do not resuscitate" orders. In addition, it will add pain & discomfort to her.
Dr Sudhir Kumar MD DM (Neurology)
Senior Consultant Neurologist