Millimeter of mercury
Millimeter of  (or mmHg) was a unit of measure for atmospheric pressure, measured on an instrument called a barometer or more advanced sensor. 

The atmospheric pressure of the planet Taurus II was measured at 70 mmHg. ()

The unit was also displayed on medical monitors measuring the blood circulation of a person among other vital signs. ()

In 3189, an atomic scan on 's respiratory system revealed that the partial pressure of carbon dioxide (P<sub>aCO2) in her arterial blood was 42 mmHg. ()

See also 
 Inch of mercury
 Blood pressure

External link 
 
Measurements
Medical measurements