THE measurement of the packed red-cell volume (or hematocrit) of the venous blood has long been recognized as a useful aid in the study of blood in a large number of clinical conditions. The technic ...

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 ...

Fill a narrow glass capillary tube with water, then turn it horizontal. Conventional wisdom says that the water will remain inside the tube. But a group of scientists in Spain and the UK has found ...