Blood pressure ( related to the wall tension of artery or vein)
Description
Blood pressure is related to the wall tension of the artery or vein, according to the Young–Laplace equation (assuming that the thickness of the vessel wall is very small as compared to the diameter of the lumen). For the thin-walled assumption to be valid the vessel must have a wall thickness of no more than about one-tenth (often cited as one twentieth) of its radius.
Related formulasVariables
Pb | Blood pressure (Pa) |
σ_θ | The cylinder stress or "hoop stress". (Pa) |
t | The wall thickness of the artery or vein (m) |
r | The inside radius of the cylinder (lumen) (m) |