paranoid disorder older term for delusional disorder. paranoid personality disorder a personality disorder in which the patient views other people as hostile, devious, and untrustworthy and reacts in a combative manner to disappointments or to events that he or she considers rebuffs or humiliations.
Blood urea nitrogen (BUN) test. Overview. A common blood test, the blood urea nitrogen (BUN) test reveals important information about how well your kidneys and liver are working. A BUN test measures the amount of urea nitrogen that's in your blood. 1  Your liver produces ammonia â which contains nitrogen â after it breaks down proteins used by your body's cells.  The nitrogen combines with other elements, such as carbon, hydrogen and oxygen, to form urea, which is a chemical waste product.
Blood urea nitrogen (BUN) test â Learn how to prepare, what to expect and possible results of this test to assess kidney and liver function.