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 specimen of choice that enables the collection of small blood volumes from neonatal or critically ill patients is a capillary blood specimen. This specimen type has gained favour with many ...

In this book Sir Almroth Wright gives a full account of the ingenious apparatus and methods which he and his co-workers have evolved for making quantitative estimations, principally in connection with ...

New research has uncovered that capillaries have the capacity to both sense brain activity and generate an electrical vasodilatory signal to evoke blood flow and direct nutrients to neurons. All it ...

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 ...

Going down: a droplet of honey in a superhydrophobic coated tube. (Courtesy: Aalto University) Honey and other highly viscous fluids can flow faster than water in specially coated capillary tubes.

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All it takes is the flip of a protein "switch" within the tiny wire-like capillaries of the brain to increase the blood flow that ensures optimal brain function. New research has uncovered that ...