Health care professionals familiar with bronchitis in the elderly?

The persistent cough can make the abdominal muscles very sore, especially in a weak person. The low blood pressure is caused by a couple of things. Dehydration--it can happen even without fever. Make sure he stays hydrated. Also, infection causes the blood vessels to dilate and leak small amounts of fluid into the body. That also lowers the BP. Hydrate hydrate hydrate...unless he has congestive heart failure. :)