Absolute blood pressure is given by the sum of atmopspheric pressure and systolic pressure for a 120mm Hg systolic pressure.
(760+ 120)mm Hg= 880 mm Hg
How does gauge pressure differ from absolute pressure?
The unit of gage pressure is pg, and it is related to absolute pressure as follows: pg = p - pa, where pa is the local atmospheric pressure. Example: A tire pressure gauge in a car measures 32.0 psi.
The most basic difference between the two is that absolute pressure uses absolute zero as its zero point, so although gauge pressure uses atmospheric pressure.
Therefore, Gauge pressure measurement is imprecise due to varying atmospheric pressure, whereas absolute pressure is always definite.
Learn more about Gauge pressure from the given link.
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