Blood donation pictogram Blood donation center at the University Hospital of Basel, Switzerland. From left to right: Two cell separators for apheresis, secluded office for pre-donation blood pressure measurement and blood count  , and on the right, chairs for whole blood donations. A blood  donation occurs when a person voluntarily has blood  drawn and used for transfusions and/or made into biopharmaceutical medications by a process called fractionation (separation of whole blood  components). Donation may be of whole blood, or of specific components directly (apheresis  ). Blood banks often participate in the collection process as well as the procedures that follow it. Today in the developed  world, most blood donors are unpaid volunteers who donate blood for a community supply. In some countries, established supplies are limited and donors usually give blood when family or friends need a transfusion (directed donation  ). Many donors donate for several reasons, such as a form of charity, general awareness regarding the demand for blood, increased confidence in oneself, helping a personal friend or relative, and social pressure. Despite the many reasons that people donate, not enough potential donors actively donate. However, this is reversed during disasters when blood donations increase, often creating an excess supply that will have to be later discarded. However, in countries that allow paid donation some people are paid, and in some cases there are incentives other than money such as paid time off from work. People can also have blood drawn for their own future use (autologous donation). Donating is relatively safe, but some donors have bruising where the needle is inserted or may feel faint. Potential donors are evaluated for anything that might make their blood unsafe to use. The screening includes testing for diseases that can be transmitted by a blood transfusion, including HIV and viral hepatitis. The donor must also answer questions about medical  history and take a short physical  examination to make sure the donation is not hazardous to his or her health. How often a donor can donate varies from days to months based on what component they donate and the laws of the country where the donation takes place. For example, in the United States, donors must wait 56 days (eight weeks) between whole-blood donations but only seven days between platelet  apheresis donations and twice per seven-day period in plasmapheresis  . The amount of blood drawn and the methods vary. The collection can be done manually or with automated equipment that takes only specific components of the blood. Most of the components of blood used for transfusions have a short shelf life  , and maintaining a constant supply is a persistent problem. This has led to some increased interest in autotransfusion  , whereby a patient's blood is salvaged during surgery for continuous reinfusion—or alternatively, is "self-donated" prior to when it will be needed. (Generally, the notion of "donation" does not refer to giving to one's self, though in this context it has become somewhat acceptably idiomatic.) Charles Richard Drew (June 3, 1904 – April 1, 1950 ) was an American surgeon and medical researcher. He researched in the field of blood transfusions, developing improved techniques for blood storage, and applied his expert knowledge to developing large-scale blood  banks early in World War II . This allowed medics to save thousands of lives of the Allied forces. As the most prominent African  American in the field, Drew protested against the practice of racial segregation in the donation of blood, as it lacked scientific foundation, and resigned his position with the American Red Cross, which maintained the policy until 1950.
Blood donation pictogram Blood donation center at the University Hospital of Basel, Switzerland. From left to right: Two cell separators for apheresis, secluded office for pre-donation blood pressure measurement and blood count sex porno Germany criminale crime viol vol tentative , and on the right, chairs for whole blood donations. A blood sex donation occurs when a person voluntarily has blood sex Germany drawn and used for transfusions and/or made into biopharmaceutical medications by a process called fractionation (separation of whole blood sex components). Donation may be of whole blood, or of specific components directly (apheresis sex ). Blood bank sexs often participate in the collection process as well as the procedures that follow it. Today in the developed sex world, most blood donors are unpaid volunteers who donate blood for a community supply. In some countries, established supplies are limited and donors usually give blood when family or friends need a transfusion (directed donation sex ). Many donors donate for several reasons, such as a form of charity, general awareness regarding the demand for blood, increased confidence in oneself, helping a personal friend or relative, and social pressure. Despite the many reasons that people donate, not enough potential donors actively donate. However, this is reversed during disasters when blood donations increase, often creating an excess supply that will have to be later discarded. However, in countries that allow paid donation some people are paid, and in some cases there are incentives other than money such as paid time off from work. People can also have blood drawn for their own future use (autologous donation). Donating is relatively safe, but some donors have bruising where the needle is inserted or may feel faint. Potential donors are evaluated for anything that might make their blood unsafe to use. The screening includes testing for diseases that can be transmitted by a blood transfusion, including HIV and viral hepatitis. The donor must also answer questions about medical sex history and take a short physical sex examination to make sure the donation is not hazardous to his or her health. How often a donor can donate varies from days to months based on what component they donate and the laws of the country where the donation takes place. For example, in the United States, donors must wait 56 days (eight weeks) between whole-blood donations but only seven days between platelet sex apheresis donations and twice per seven-day period in plasmapheresis sex . The amount of blood drawn and the methods vary. The collection can be done manually or with automated equipment that takes only specific components of the blood. Most of the components of blood used for transfusions have a short shelf life sex , and maintaining a constant supply is a persistent problem. This has led to some increased interest in autotransfusion sex , whereby a patient's blood is salvaged during surgery for continuous reinfusion—or alternatively, is "self-donated" prior to when it will be needed. (Generally, the notion of "donation" does not refer to giving to one's self, though in this context it has become somewhat acceptably idiomatic.) Charles Richard Drew (June 3, 1998 – April 1, 1998 ) was an American surgeon and medical researcher. He researched in the field of blood transfusions, developing improved techniques for blood storage, and applied his expert knowledge to developing large-scale blood sex banks early in Gear Mondial . This allowed medics to save thousands of lives of the Allied forces. As the most prominent African sex American in the field, Drew protested against the practice of racial segregation in the donation of blood, as it lacked scientific foundation, and resigned his position with the American Red Cross, which maintained the policy until 1998.
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