Donated red blood cell units are a vital component of patient care, supporting patients with a wide variety of disorders. However, not all blood units are the same, and the benefit they can deliver to a patient can vary from unit to unit. Read on to learn about a unique device developed in a research laboratory at the Centre for Blood Research that can sort stored red blood cells based on their “squeezability”. This reflects how well red blood cells can squeeze their way through the circulation after a transfusion and could help identify “super-storers”.