The best option is to place everything you have obtained in to a Heparin tube. If you wish to make a film there is usually sufficient blood remaining in the syringe. However do not try to make any films from your sample as this may waste valuable blood. This will enable us to do Haematology and most biochemical tests required for a basic screen. Please advise us of the order in which you would like diagnostics performed on small samples. We can advise you of what we would consider the most important to run on a case by case basis.