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.
You must wait at least 72 hours after donating blood before you can donate platelets. After an automated double red cell collection, you must wait 112 days before donating again. You can donate platelets once in a seven-day period and up to 24 times a year. You must wait at least 72 hours after donating platelets before donating whole blood. After an automated double red cell collection, you must wait 112 days before donating again. In any eight-week period, you can make one blood donation and one platelet donation or six platelet donations.