![]() Taking slow deep breaths is usually enough to calm these feelings. Occasionally, some people may feel queasy or light-headed while the blood is drawn or shortly after. Obtaining a sample of blood from a vein takes a few minutes and generally causes only minimal discomfort. ![]() The test involves drawing blood from a vein in the arm or hand. A platelet count that is lower than it once was or on the lower end of normal may not be a cause for concern in an older adult - especially if there are no other symptoms. Platelet count tends to decline with age.
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