Question

HELP ASAP Suppose a vessel has a blood flow rate of 17 ml/min and the pressure in the vessel drops by 37 mmHg. What is the resistance

in the vessel?

Answer 1

The basic tenet of calculating resistance is that flow is equal to driving pressure divided by flow rate.

`r = ΔP/ q`

where

• R is Resistance measured in HGU
• ΔP is the change in pressure across the circulation loop measured in mmHg
• Q is the flow through the vasculature measured in L/min

So resistance is equal to:

`r = 37mmhg / 0.017l / min = 2176hgu`