While âBRBâ is most widely used in the context of real-time chat, the term has been also discussed on Usenet, including a post on the alt.usage.english newsgroup on January 13th, 1994.
Blood transfusions are done to replace blood lost during surgery or due to a serious injury. A transfusion also may be done if your body can't make blood properly because of an illness. During a blood transfusion, a small needle is used to insert an IV line into one of your blood vessels. Through this line, you receive healthy blood. The procedure usually takes 1 to 4 hours, depending on how much blood you need. Blood transfusions are very common. Each year, almost 5 million Americans need a blood transfusion.
Instead, more specific parts of blood are transfused as needed. Red blood cells, the most commonly transfused part, are used to increase the blood's ability to carry oxygen and prevent tiredness and other complications. Transfusions take 1 to 4 hours, depending on how much blood is given and the blood type. No special recovery time is needed. Most transfusions are done in a hospital, but can be done elsewhere when necessary. In most cases, the blood comes from volunteer donors.