As a matter of fact, these test tubes are characterized by such features that make them extremely easy to use: for example, the presence of an arrow to indicate the blood level, the convenience in ...

The capillary tubes are made for neonates. In neonates, capillary blood samples are desirable over other forms of sampling. This is because frequent blood collection from patients with low blood ...

In another rough experiment with tubes of different diameters, all filled to a height of 40 mm. with diluted blood, after 5 hours there were the following proportions of clear serum:— ...