Finding blood pressure from density and height difference

AI Thread Summary
The discussion revolves around calculating blood pressure using the formula involving density and height difference. The initial calculation of 8544.51 N/m^2 is questioned for its correctness. Participants suggest that the appropriate formula for gauge pressure should be Δp = ρgΔh, rather than the one initially used. The conversation highlights the importance of using the correct equation for accurate pressure measurement. Overall, clarity on the right formula is essential for accurate calculations in this context.
yourheartandsoul
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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!
 
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yourheartandsoul said:
unsure
Why ?
 
BvU said:
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.
 
yourheartandsoul said:
another formula for gauge pressure
Namely ?
 
BvU said:
Namely ?
Pabs = Pg + Patm
 
The exercise text mentions gauge pressure explicitly...
 

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