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A sphygmomanometer (/ ˌ s f ɪ ɡ m oʊ m ə ˈ n ɒ m ɪ t ə r / SFIG-moh-mə-NO-mi-tər), also known as a blood pressure monitor, or blood pressure gauge, is a device used to measure blood pressure, composed of an inflatable cuff to collapse and then release the artery under the cuff in a controlled manner, [1] and a mercury or aneroid manometer to measure the pressure.
A more accurate value of systolic blood pressure can be obtained with a sphygmomanometer and palpating the radial pulse. [11] Methods using constitutive models have been proposed to measure blood pressure from radial artery pulse. [citation needed] The diastolic blood pressure cannot be estimated by this method. The American Heart Association ...
The sphygmograph (/ ˈ s f ɪ ɡ m ə ˌ ɡ r æ f, ˌ ɡ r ɑː f / [1] [2] SFIG-mə-graf) was a mechanical device used to measure blood pressure in the mid-19th century. It was developed in 1854 by German physiologist Karl von Vierordt (1818–1884). It is considered the first external, non-intrusive device used to estimate blood pressure.
Manual sphygmomanometer and stethoscope used to take blood pressure in clinic. Blood pressure is recorded as two readings: a higher systolic pressure, which occurs during the maximal contraction of the heart, and the lower diastolic or resting pressure. [11] In adults, a normal blood pressure is 120/80, with 120 being the systolic and 80 being ...
Hence, cuff pressure is lowered and the overall blood volume remains constant. As blood volume and thus PG is held constant over time, the pressure difference between cuff pressure and intra-arterial pressure is zero. Intra-arterial pressure is equal to cuff pressure, which can easily be measured by means of the manometer M. [citation needed]
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