# Blood pressure watch

1. Can anyone educate me about the vascular resistance in blood pressure
2. (Original post by BerryBerry23)
Can anyone educate me about the vascular resistance in blood pressure
What exactly do you want to know? Vascular resistance is defined as the pressure gradient required for a given flow (Resistance = Pressure gradient/Flow). If resistance is high, a greater pressure gradient is required for a given flow. Resistance is proportional to the distance the blood must travel as well as the viscosity of the blood. Resistance is inversely proportional to the radius4 of the vessel. Therefore, if the radius of the vessel is halved, the resistance will increase by a factor of 16 (24=16).
Resistance = (8 x viscosity x length)/(pi x r4). This is known as Poiseuille's law.
3. Thanks for your help, its exactly what i needed😊

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: February 25, 2018
The home of Results and Clearing

### 3,174

people online now

### 1,567,000

students helped last year
Today on TSR

### University open days

1. London Metropolitan University
Sat, 18 Aug '18
2. Edge Hill University
Sat, 18 Aug '18
3. Bournemouth University