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

Claim 17:
18. A server device, configured to be connected to a blood pressure information measuring device having an electrocardiogram detector configured to detect an electrocardiogram of a subject and a pulse wave detector configured to detect a pulse wave of the subject, and computes blood pressure information of the subject, wherein the pulse wave detected by the pulse wave detector is a plethysmogram, the server device comprising:
a processor configured to compute a systolic blood pressure of the subject and a diastolic blood pressure of the subject, from a ventricular systolic phase pulse transit time computed 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, a ventricular diastolic phase pulse transit time computed from a T wave of the electrocardiogram waveform and a D wave of the pulse wave, and characteristic information on an acceleration pulse wave computed by performing second-order differentiation of the 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.