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 ?
A small bead of mercury was observed in the sphygmomanometer, which had been stored in the family's unattached garage after its removal from the home.
Most of these studies included normotensive and hypertensive patients; featured wide age, body mass index (BMI), and clothing thickness ranges; and used automatic sphygmomanometers. 7-10 In only one study, a mercury-filled column sphygmomanometer was used for the blood pressure measurements.
From a biomechanical perspective, this idiosyncratic anatomical position of the plaque induced a sclerotic shield-like covering over the brachial artery rendering it incompressible at normal pressure exerted by the sphygmomanometer as compared to the contralateral brachial artery.
Then manual mercury sphygmomanometer was used to measure first blood pressure reading by blind observer in sitting position in left arm.
To anticipate shock and to apply remedial measures before the process has become well advanced requires an earlier recognition than is possible without the sphygmomanometer" (8).
A Several devices are available that measure blood pressure in your upper arm, wrist or finger, including older mercury and aneroid sphygmomanometers and newer digital monitors.
How much error exists in physiologic measurement depends on the accuracy and precision of the instruments used to measure the variable (sphygmomanometers, blood glucose meters, etc.), as well as the variability of the people doing the measurement.
Blood pressure was measured three times at 5-minute intervals during a single visit, using a mercury sphygmomanometer. The mean of the three measurements was used as the final blood pressure.
Blood pressure was measured three times at 5-minute intervals in a single visit, using a mercury sphygmomanometer. The mean of the measurements was used as the final blood pressure.
I do know what a sphygmomanometer is, but I don't know how it works and what it does.
When a doctor or paramedic takes your blood pressure today, they'll use a blood-pressure cuff, or sphygmomanometer (sfig-mo-man-AH-met-er) and a stethoscope.