MM HG Meaning and
Definition
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mm Hg stands for millimeters of mercury. It is a unit of measurement commonly used to denote pressure, particularly in the field of medicine and physics. The term "mm Hg" refers to the height of a column of mercury in a pressure-measuring device, such as a barometer or a manometer, where the pressure exerted is equivalent to the weight of the mercury column.
The unit is derived from the concept that pressure can be measured by the force exerted by a fluid (in this case, mercury) in a closed tube or column. In a mercury barometer, for instance, the atmospheric pressure pushes down on a pool of mercury in an inverted tube, causing the mercury to rise inside the column. The height of the mercury column indicates the pressure exerted by the atmosphere and is reported in millimeters of mercury, mm Hg.
Millimeters of mercury is a scientifically accepted unit of pressure and is widely used in medical settings to measure blood pressure. It is usually denoted as a ratio and reported as millimeters of mercury over millimeters of a particular fluid, such as blood. Normal blood pressure is often expressed as a ratio, with systolic pressure over diastolic pressure, followed by mm Hg. For example, a blood pressure reading of 120/80 mm Hg means the systolic pressure is 120 mm Hg, and the diastolic pressure is 80 mm Hg.
Common Misspellings for MM HG
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