Method and apparatus for non-invasive blood-pressure measurement
AssigneeTaidoc Corp., Ltd.
InventorsShu-Mei Wu, Yao Ou-Yang, Ja-Shi Wu, Tung-Chuang Jan, Chao-Wang Chen
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Abstract
A method and an apparatus for non-invasive blood-pressure measurement performing step-by-step inflating and deflating of the cuff pressure are disclosed. The step-by-step inflation-and-deflation process of the invention can determine the highest inflating pressure and provide enough data to obtain a curve fitting envelope. Therefore, the inflation pressure of the cuff to be pumped much higher than the normal systolic pressure of the conventional method can be prevented. A comfortable systolic and diastolic pressure determination method applying fuzzy control is achieved.
Claims7
A method for measuring blood pressure, comprising the steps of:
- (a) applying pressure to an artery of a subject;
- (b) reducing the pressure to permit an increasing flow of blood through the artery;
- (c) monitoring arterial counterpressure oscillations while step (b) is conducted;
- (d) converting the counterpressure oscillations to voltage signals;
- (e) processing the voltage signals into a sequence of peak amplitudes that define a curve;
- (f) repeating steps (a) through (e) to obtain at least one further curve;
- (g) fitting the curves to an oscillometric envelope;
- and
- (h) finding at least one blood pressure value from the oscillometric envelope.
Dependencies are inferred from the claim text.