- Poiseuille's equation gives factors that change the resistance of blood vessels.

tt r4


R = resistance t) = viscosity of blood I = length of blood vessel r4 = radius of blood vessel to the fourth power

- Resistance is directly proportional to the viscosity of the blood. For example, increasing viscosity by increasing hematocrit will increase resistance and decrease blood flow.

- Resistance is directly proportional to the length of the vessel.

- Resistance is inversely proportional to the fourth power of the vessel radius. This relationship is powerful. For example, if blood vessel radius decreases by a factor of 2, then resistance increases by a factor of 16 (24), and blood flow accordingly decreases by a factor of 16.

Anxiety and Depression 101

Anxiety and Depression 101

Everything you ever wanted to know about. We have been discussing depression and anxiety and how different information that is out on the market only seems to target one particular cure for these two common conditions that seem to walk hand in hand.

Get My Free Ebook

Post a comment