In acute hemorrhage it is sometimes necessary to transfuse blood very rapidly in order to save the patient's life. This can be done safely by a number of methods, such as inserting needles into more than one vein and thus running multiple infusions simultaneously; by using a large-bore needle for the venipuncture; by elevating the bottle to increase the hydrostatic pressure; or by connecting a three-way stopcock between the needle and the intravenous tubing, and pumping the blood in by syringe. Collection of blood from donors into plastic bags also makes possible rapid administration by direct pressure on the bag without any danger to the recipient. Whatever method is used, it is well to bear in mind that 10 cc. of 10% calcium gluconate should be injected intravenously for every 1,000 cc. of blood infused, in order to counteract the effect of the citrate in binding the ionized calcium.