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Blood Types

Blood Types. Some Facts about Blood. An adult body contains 10-12 pints of blood. It takes about 6-10 minutes to donate a pint of blood and 24 hours for your body to replace the blood fluid volume. The red cells may take up to two months for full restoration.

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Blood Types

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  1. Blood Types

  2. Some Facts about Blood • An adult body contains 10-12 pints of blood. • It takes about 6-10 minutes to donate a pint of blood and 24 hours for your body to replace the blood fluid volume. The red cells may take up to two months for full restoration. • One unit of blood can be separated into components and used to treat up to three patients. • Whole blood has a shelf-life of 35 days. Red blood cells last 42 days, platelets only five days and plasma up to one year. • The most common blood type is O positive (38% of the population). The rarest blood is AB negative (<1%). • An average healthy person will be eligible to give blood more than 330 times in his or her lifetime. • Less than 5% of the general population donates blood and yet the majority of people will have at least one family member who will require at least one blood transfusion in their lifetime. Medical Director approval 11/14/01; www.aabb.org

  3. More Facts • Almost 40% of the population has O+ blood • Patients with Type O blood must receive Type O blood • About half of all blood ordered by hospitals in our area is Type O • Type O blood is the universal blood type and is the only blood type that can be transfused to patients with other blood types • Only about 7% of all people have Type O negative blood • Type O negative blood is the preferred type for accident victims and babies needing exchange transfusions • There is always a need for Type O donors because their blood may be transfused to a person of any blood type in an emergency Source: AABB.ORG

  4. What is the Rh Factor? • While studying Rhesus monkeys, a certain blood protein was discovered. • This protein is also present in the blood of some people. • Other people, however, do not have the protein. • The presence of the protein, or lack of it, is referred to as the Rh (for Rhesus) factor.

  5. Are You Rh Positive or Negative? • If your blood does contain the protein, your blood is said to be Rh positive (Rh+). • If your blood does not contain the protein, your blood is said to be Rh negative (Rh-). • This Rh factor is connected to your blood type. • For example, your blood may be AB+ which means that you have type AB blood with a positive Rh factor. • Or, you might have O- blood which means that you have type O blood with a negative Rh factor.

  6. Should we be concerned? • It is particularly important for expectant mothers to know their blood's Rh factor. • Occasionally, a baby will inherit an Rh+ blood type from its father while the mother has an Rh- blood type. • The baby's life could be in great danger if the mother's Rh- blood attacks the baby's Rh+ blood. • If this happens, an exchange transfusion may save the baby's life. • The baby's blood can be exchanged for new blood that matches the mother's.

  7. If your blood type is . . . Source: AABB.ORG

  8. Out of 100 donors . . . . . Source: AABB.ORG

  9. Blood Type Tutorial • The Biology Project http://www.biology.arizona.edu/human_bio/problem_sets/blood_types/Intro.html

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