Sphygmomanometer


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sphygmomanometer

[¦sfig·mō·mə′näm·əd·ər]
(medicine)
An instrument for measuring the arterial blood pressure.

Sphygmomanometer

 

an instrument for measuring the arterial blood pressure indirectly. There are two types of sphygmomanometer: the mercury, or Riva-Rocci sphygmomanometer, named after the Italian pediatrician S. Riva-Rocci, who designed it in 1896, and the membrane sphygmomanometer, generally called a tonometer.

The sphygmomanometer has a manometer and is equipped with a rubber pressure cuff covered with closely woven cloth, a pressure bulb with air valves, T-pipe, and a screw valve for reducing pressure. The auscultatory, or acoustic, method of N. S. Korotkov is the usual method of measuring arterial pressure indirectly. The pressure cuff is generally wrapped around the shoulder and inflated with air in order to compress the brachial artery and arrest the flow of blood in it. The capsule of a phonendoscope is positioned at the anterior part of the elbow joint, and air is gradually released from the cuff; a note is made of the manometer reading at which Korotkov sounds are audible in the phonendoscope. At this moment, the pressure in the cuff corresponds to the systolic (maximum) blood pressure in the brachial artery. The sounds disappear as more air is released from the cuff. At the moment when the sounds cease, the pressure is equal to the diastolic (minimum) pressure. Automatic devices have been designed to monitor blood pressure in seriously ill persons. They are modeled on the sphygmomanometer and detect sounds by means of a microphone.

N. K. SARADZHEV

References in periodicals archive ?
EPA estimated that approximately 80 g (6 mL) of mercury were originally in the sphygmomanometer.
7-10 In only one study, a mercury-filled column sphygmomanometer was used for the blood pressure measurements.
Then manual mercury sphygmomanometer was used to measure first blood pressure reading by blind observer in sitting position in left arm.
Early sphygmomanometers measured the force in terms of a weight or a spring, the most successful of these being that of Samuel Siegfried Ritter von Basch who devised a small rubber water-filled ball which was connected to a manometer.
Turner and colleagues (2008) had the clinical engineering department at their hospital calibrate the sphygmomanometers used in the study to ensure their accuracy.
A sphygmomanometer (sfig-mo-man-AH-met-ur) measures the pressure created by your heart as it pushes blood through your arteries to your body.
The diagnosis of hypertension should be made only after two or more elevated sphygmomanometer readings are obtained on at least two visits separated by 1 to several weeks.
recognized the need for improvement and designed an innovative, shock-resistant gauge, DuraShock Sphygmomanometer, to measure blood pressure.
For home use, an electronic sphygmomanometer is ideal.
In this study, a recently marketed proprietary finger blood pressure monitor, the Marshall, Astro F-88, was compared with the standard auscultative brachial mercury sphygmomanometer on 125 subjects.
The Accoson greenlight 300 sphygmomanometer, an electronic version of the old mercury blood pressure monitors which are being phased out of hospitals on safety grounds, won a special award last night.
Each mercury sphygmomanometer contains about 135 g of mercury When broken or refurbished, these instruments need to be handled by hazardous waste management rules.