medical device

According to FDA description, a medical device can range from a tongue depressor (simple metal spoon ) to a complicated programmable and artificial pancreas system.
These medical devices serve as an instrument, apparatus, implant, tool, in vitro reagent, or similar material that is to diagnose, prevent, mitigate, treat, or cure disease or a condition. What is in the pharmaceutical business or biologic if we ask? Driving a purpose through a physical, structural, or mechanical action but not through chemical or metabolic action within or on the human body, 

Alzheimer’s disease and what you should do about it.

It gets a bit confusing when we talk about Alzheimer's to differentiate it from dementia; well, Alzheimer's and dementia are related, but there is a fundamental difference between the two conditions. On the one hand, dementia is not a specific disease but rather a general term for impairment in your ability to remember or make decisions that interfere with daily activities. Alzheimer's, on the other hand, is a condition commonly causing dementia, among many other things. Alzheimer's also causes loss of memory and other cognitive disabilities.