How many types of electronic sphygmomanometers are commonly used?

by | Mar 1, 2021 | Blood Pressure

There are currently two types of sphygmomanometers, “deflated” and “inflatable” sphygmomanometers. The deflated sphygmomanometer measures blood pressure during the deflation of the cuff.

Vented oscillometric electronic sphygmomanometers are currently used by most oscillographic electronic sphygmomanometers.

The blood pressure measurement process is similar to the mercury auscultation method. The instrument automatically sets the inflation pressure in advance: 160~180 mmHg for adults; 120~160 mmHg for children; 70~120 mmHg for newborns.

When the initial pressure is not enough to measure blood pressure, the system will automatically recognize and inflate to a higher pressure again.

The intelligent oscillometric electronic sphygmomanometer can automatically adjust the initial inflation pressure. Once the cuff reaches a satisfactory pressure, the exhaust valve opens and the cuff pressure drops. There are two types of exhaust valve opening, phase opening and continuous opening.

The inflatable type is to complete the blood pressure measurement during the inflating of the cuff. The inflatable oscillometric electronic sphygmomanometer measures blood pressure during the cuff inflation process. During the cuff inflation process, the pressure felt by the pressure sensor increases continuously. At this time, the pulse pulse can be detected from the data collected by the pressure sensor. This sphygmomanometer measures blood pressure in a short time, has low power consumption, is not compressed by blood vessels, and does not need to set pre-inflation pressure.

Family self-test blood pressure, choose upper arm type or wrist type?

At present, upper-arm and wrist-type electronic blood pressure monitors mostly use the principle of the oscillometric method.

The clinical application of a wrist-type electronic sphygmomanometer is generally not recommended, because its accuracy is not as good as that of an upper-arm electronic sphygmomanometer. Although the arterial sphygmomanometer can continuously detect the blood pressure per stroke, its principle is the arterial volume clamp method, not the principle of the oscillometric method. In general, arterial sphygmomanometers cannot be used for the diagnosis and detection of hypertension, but are mostly used in scientific research.

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