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.
1 Whole blood donation takes approximately 45 to 60 minutes. 2  Donating plasma or platelets (called apheresis or automated donation) takes about 1 1/2 to two hours. 3  The Mayo Clinic Blood Donor Center in Rochester provides televisions, video on demand and wireless Internet access for donors to use during donations. You can donate whole blood as often as every 84 days at the Mayo Clinic Blood Donor Center in Rochester. 2  Plasma donors may donate as often as every 28 days. 3  Platelets donors may donate as frequently as every eight days, and up to 24 times in a 12-month period.