Finding blood pressure from density and height difference

[yourheartandsoul]

Homework Statement

A large artery is cannulated, and a saline solution of density 1300 kg * m ^ - 3 is used as the manometer fluid. What is the blood pressure ( gauge pressure ) if the height difference in the manometer tubes is 0.67 m?

Relevant Equations

P=dgh

I did (1300)(9.81)(0.67) and got 8544.51 N/m^2 but unsure if that was the correct route to take. Please confirm or deny if I was approaching it in the correct way!

 

[BvU]

unsure

Why ?

 

[yourheartandsoul]

Why ?

Because I know there is another formula for gauge pressure and I'm worried it might be that equation and not the one I used.

 

[BvU]

another formula for gauge pressure

Namely ?

 

[yourheartandsoul]

Namely ?

Pabs = Pg + Patm

 

[BvU]

The exercise text mentions gauge pressure explicitly...

 

[BvU]

Ah, perhaps you should change your relevant equation to $\Delta p = \rho g \Delta h$ ...

https://en.wikipedia.org/wiki/Pressure_measurement#Liquid_column_(manometer)

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