Sphygmomanometer and method for controlling optimum pressurization and minute exhaustion while measuring blood pressure
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United States of America Patent
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Sep 2, 1997
Grant Date -
N/A
app pub date -
Jul 21, 1995
filing date -
Jul 27, 1994
priority date (Note) -
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Abstract
A sphygmomanometer for controlling an optimum pressurization and minute exhaustion comprises a cuff which is wrapped around the upper arm of a subject for compressing the brachial artery. The cuff is pressurized with an air pump controlled by a microcontroller. The microcontroller is programmed to terminate the pressurization process at the point the systolic pressure is detected. The microcontroller further controls the exhaustion of air by switching a solenoid valve on and off and thereby negate the need for a costly minute exhaust valve. During the pressurization and depressurization process, pressure waves are transmitted from the brachial artery to a sensor where they are converted to an electrical signal for processing by the microcontroller. The microcontroller computes the systolic and diastolic pressure and routes the data to a display for visual readout.
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