Minor chest injury. You may have chest wall pain after a less serious injury. This pain can occur with movement of a shoulder, an arm, the rib cage, or the trunk of the body. Even a minor injury can cause chest pain for days after the injury.
Quick Answer. A unit of blood is equivalent to approximately 1 pint or 450 milliliters, according to the Canadian Blood Services website. The average patient requires around 4.6 units of blood. Continue Reading.
Report Abuse. 1  A unit of blood is actually less than a litre, its about 300ml. When a unit is donated it starts off being about 500ml, then the unit is centrifuged to remove most of the plasma (liquid part) leaving behind the red blood cells. 2  A blood transfusion can have up to 500 ml in it. It really depends on how it was donated (ie.self or a compatible donor). It also depends on the persons age, size and medical condition. When transfusing packed red blood cells, I always see 350 ml on the bags at work, but I seldom get 350 ml out of it when transfusing.