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A millimetre of mercury is a manometric unit of pressure, formerly defined as the extra pressure generated by a column of mercury one millimetre high, and currently defined as exactly 133.322 387 415 pascals [ 1] or exactly 133.322 pascals. [ 2] It is denoted mmHg[ 3] or mm Hg. [ 4][ 2]
Blood pressure ( BP) is the pressure of circulating blood against the walls of blood vessels. Most of this pressure results from the heart pumping blood through the circulatory system. When used without qualification, the term "blood pressure" refers to the pressure in a brachial artery, where it is most commonly measured.
Pulse pressure. Pulse pressure variation (PPV) in different arteries and veins. [ edit on Wikidata] Pulse pressure is the difference between systolic and diastolic blood pressure. [ 1] It is measured in millimeters of mercury (mmHg). It represents the force that the heart generates each time it contracts.
Arterial blood pressure is most commonly measured via a sphygmomanometer, which historically used the height of a column of mercury to reflect the circulating pressure. [ 1] Blood pressure values are generally reported in millimetres of mercury (mmHg), though modern aneroid and electronic devices do not contain mercury .
New research suggests even just a bump of 10 mmHg over normal levels of systolic blood pressure can increase risk of stroke by 20%. "We combined six studies that have followed participants over ...
Blood gas tension refers to the partial pressure of gases in blood. [1] There are several significant purposes for measuring gas tension. [2] The most common gas tensions measured are oxygen tension (P x O 2 ), carbon dioxide tension (P x CO 2) and carbon monoxide tension (P x CO). [3] The subscript x in each symbol represents the source of the ...
Vapor pressure[ a] or equilibrium vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. The equilibrium vapor pressure is an indication of a liquid's thermodynamic tendency to evaporate. It relates to the balance of particles escaping ...
24336-0. An arterial blood gas ( ABG) test, or arterial blood gas analysis ( ABGA) measures the amounts of arterial gases, such as oxygen and carbon dioxide. An ABG test requires that a small volume of blood be drawn from the radial artery with a syringe and a thin needle, [ 1] but sometimes the femoral artery in the groin or another site is used.