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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
People about to have surgery must tell their health care providers about all supplements they take.
Asthma cases in Americans are about 75% higher today than they were in 1980.
Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.