Why isn’t blood pressure measured in pounds per square inch like every other pressure measurement?

Question

Why isn’t blood pressure measured in pounds per square inch like every other pressure measurement?

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Answer 1

First off not every other pressure measurement is in PSI. There are many units for pressure (torr, atm, mmHg, Pascal) and we use them all. Atmospheric pressure, for example, is NEVER expressed in PSI. All the units are easily converted between so there is no more hard in using multiple units of pressure than there is in using multiple units for temperature or mass.