Hemodynamics Flashcards
laminar blood flow
concentrically layer velocities for blood flow, moving blood in a parabolic motion.
laminar flow compared to turbulent blood flow
laminar is more efficient
korotkoff sounds
heard as a result of turbulent blood flow. What you hear when doing bp
how does velocity influence turbulence
as it increases, turbulence increases
how does diameter influence turblence
as it increases turbulence increases
how does viscosity influence turbulence
as it increases, turbulence decreases
anomalous viscosity
tension against capillary walls is very low, as blood goes to capillaries it’s pressure decreases
Relationship between tension, radius, and pressure
tension is proportional to radius and pressure
How are capillaries able to hold high pressures without having muscular walls?
walls have small radii, so there is less tension placed on them. Also there is SA of arterioles branching prior to reaching cap beds, so blood pressure is low
How does larger aneurysm relate to chance of rupture
larger aneurysm - greater chance of rupture
because higher tension is placed on the wall, so it’s more likely to rupture
What has the highest volume of blood
venous circuit
What has the least volume of blood
capillary
What has the middle volume of blood
arterial circuit
How can you calculate flow
flow = velocity of blood x cross sectional area
flow - change in pressure / resistance
How can you calculate the total peripheral resistance
(Pi-Po) / CO
