Hemodynamics

Question 1

The relationship between flow Raye (Q), pressure difference (P) and resistance (R) is described by which law?

Answer 1

Poisuilles law for fluids

Question 2

Typically the Viscosity and length of vessel don’t change therefore flow rate is determined by

Answer 2

pressure difference and vessel diameter

Question 3

Two categories of blood flow

Answer 3

Turbulent & laminar

Question 4

Types of laminar

Answer 4

Plug
Parabolic
Skewed
Disturbed

Question 5

Plug flow (laminar)

Answer 5

Flat blunt profile,
Occurs at the outflow Lv tract and MV & TV inflow tracts

Question 6

Parabolic flow (laminar)

Answer 6

Curved because friction, fastest at the centre of the flow

Question 7

Skewed flow

Answer 7

Higher velocities at outside of the curve

Question 8

Disturbed flow

Answer 8

Occurs when a vessel bifurcation. Flow remain laminar at outer walls but eddy currents at inner walls

Question 9

What are eddy currents

Answer 9

Regions of slow circular flow.

Question 10

Turbulent flow and Reynolds number

Answer 10