Patent ID: 11925442
Assignee: ARBLET INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A blood pressure information measuring system for measuring blood pressure information of a subject, comprising:
an electrocardiogram detector configured to detect an electrocardiogram of the subject;
a pulse wave detector configured to detect a pulse wave of the subject, wherein the pulse wave detected by the pulse wave detector is a plethysmogram; and
a processor configured to perform the steps of:
computing a ventricular systolic phase pulse transit time from an R wave of an electrocardiogram waveform that is a waveform of the electrocardiogram based on a potential detected by the electrocardiogram detector and a P wave of the pulse wave detected by the pulse wave detector, and computing a ventricular diastolic phase pulse transit time from a T wave of the electrocardiogram waveform and a D wave of the pulse wave;
performing second-order differentiation of the pulse wave to compute an acceleration pulse wave; and
computing a systolic blood pressure of the subject and a diastolic blood pressure of the subject from the ventricular systolic phase pulse transit time, the ventricular diastolic phase pulse transit time, and characteristic information on the acceleration pulse wave, wherein the processor computes the systolic blood pressure using intensity ratio of an a wave and a b wave of the acceleration pulse wave computed and the ventricular systolic phase pulse transit time, and computes the diastolic blood pressure from intensity ratio of an e wave and an f wave of the acceleration pulse wave computed and the ventricular diastolic phase pulse transit time, and wherein the R wave represents state of ventricular contraction, the P wave is generated by left ventricular ejection, the T wave represents onset of ventricular dilatation, and the D wave is a reflected vibrational wave.