A little goes a long way.

This film is designed to illustrate the ever increasing need for blood and blood products. It describes modern methods of collection, testing, handling and distribution to meet not only routine demands but also specialised applications. A heart/lung machine is shown in action during an actual valve replacement operation. Examples of patients being treated with blood components are also featured. Blood components are used in the treatment of many specific conditions. The one 'pint' of blood given by a donor is broken down into its different components which are then used to help a number of patients with differing problems.