After there wont be enough blood to keep organs working notably the brain and the patient will first go unconscious before dying. Blood a core stat in DayZ is second only to Health in terms of importance. Pinterest If you have unknown antibodies that will increase the time it takes to make sure the blood they give you is safe. . It depends on the pace at which blood is lost. This drops your blood volume. Find out how much blood you lose in common situations such as a nosebleed and how much you can lose before nausea fainting shock or other complications occur. You can lose 4 pints of blood after that youre dead. A sample of the patients blood needs to go to the Blood Bank in the hospital where they run it through a machine to not only type it but check for antibodies. Your red cells are replaced every 120 days or so and your bone marrow therefore replaces roughly 1 or 45ml per day lets call it 50ml for easier sums. ...