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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.