Device for displaying blood pressure
First Claim
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1. A device for determining blood pressure for a living subject, comprising:
- a portable housing including a cuff member for receiving a digit of said subject for sensing the arrival of a pulse of blood and means for detecting electrocardiographic R-waves and including a conductive area adapted to receive another digit of said subject;
means for displaying at least one of the pulse rate and the magnitude of systolic and diastolic blood pressure relative to at rest values;
switching means for controlling the function of said device and including a respective switch for an enter, set, audio/split, mode and calibrate functions; and
processing means for determining a value of diastolic blood pressure and including means for determining an elapsed time TT between the sensed instant of emission of each R-wave, the sensed instant of arrival of the consequent electrocardiographic R-wave and a heart beat rate HR, and means for computing the product of HR and TT and a constant having a value of blood pressure as a function of the product of HR and TT and determining said value of diastolic blood pressure.
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Abstract
A measure of diastolic blood pressure is provided by the product of HR and TT wherein HR is a measured heart beat rate and TT is an elapsed time between emission of an electrocardiographic R wave and arrival of the consequent blood pressure pulse at a chosen blood vessel.
Apparatus is disclosed for sensing HR and TT and displaying a value or index of diastolic blood pressure, which is intended to be worn on the wrist and may serve also as a timepiece.
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Citations
5 Claims
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1. A device for determining blood pressure for a living subject, comprising:
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a portable housing including a cuff member for receiving a digit of said subject for sensing the arrival of a pulse of blood and means for detecting electrocardiographic R-waves and including a conductive area adapted to receive another digit of said subject; means for displaying at least one of the pulse rate and the magnitude of systolic and diastolic blood pressure relative to at rest values; switching means for controlling the function of said device and including a respective switch for an enter, set, audio/split, mode and calibrate functions; and processing means for determining a value of diastolic blood pressure and including means for determining an elapsed time TT between the sensed instant of emission of each R-wave, the sensed instant of arrival of the consequent electrocardiographic R-wave and a heart beat rate HR, and means for computing the product of HR and TT and a constant having a value of blood pressure as a function of the product of HR and TT and determining said value of diastolic blood pressure. - View Dependent Claims (2, 3, 4, 5)
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Specification