How much blood can we lose without danger?
Blood donors give about a pint of blood without ill effects. Yet the same amount of blood pouring from a wound seems pretty serious. How much blood can we lose without danger?
answer:
The average person can lose a pint of blood without danger, and that is why this is the amount usually chosen for blood donating. However, the loss of blood from a wound should always be taken seriously. At a blood donating center, a pint of blood is given under carefully controlled conditions. In the case of accidental bleeding, not only would it be hard to judge the amount of blood being lost, but there is the added risk of infection from germs that may enter a wound. It has been shown that the body can lose up to a third of its blood supply (about four pints for the average person) without apparent serious effect, but the loss of half the body’s blood is almost always fatal, and even the loss of two pints of blood will often cause shock.
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Time: October 30, 2008, 10:02 am
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