question: Hi, I am calling about my husband.  He has pulmonary Fibrous, asthma, emphysema, and a right sided diaphram paralysis.  Hw is 82 years old, on O2 24/7.  He has started to have intermittent, pulsating headaches.  We do not know what to do at this time.  His blood oximetry is 90 and pulse 82.What would you suggest?