"Immediately distal to vessel stenosis, blood velocity is increased such that the Reynolds number exceeds critical. Post-stenotic turbulence and flow separation leads to an increased range of blood velocities which manifests as spectral broadening on Doppler ultrasound 2."
Expected headings
"Calculation"
"Clinical use"
"Where: ρ = fluid density; v = fluid velocity; D = diameter of pipe; μ = dynamic viscosity of fluid."
"Where: ρ = fluid density; v = fluid velocity; D = diameter of pipe; μ = dynamic viscosity of fluid."
"Where: ρ = fluid density; v = fluid velocity; D = diameter of pipe; μ = dynamic viscosity of fluid."
"The critical Reynolds number is highly variable depending on pipe geometry, which in the human body varies considerably due to vessel curvature, branching and viscoelastic properties 2. These factors, combined with the pulsatile nature of the cardiac cycle, lead to the approximation of laminar flow only along short distances in small abdominal vessels 2. Despite this, the Reynolds number retains its use as a guiding relationship for predicting likely blood flow patterns."