Patent ID: 9149194
Filing Date: 2015-10-06
Classification: A61B

Abstract:
1. An electronic sphygmomanometer comprising: a first cuff configured to be wrapped around a peripheral site, a second cuff to be wrapped around an upper arm; a pressure detection unit that detects a first cuff pressure signal representing a pressure of the first cuff and a second cuff pressure signal representing a pressure of the second cuff; a specific processing unit that carries out a process that specifies an upper arm V a measurement control unit that measures a blood pressure of a person to be measured based on the first cuff pressure signal; and a first volume detection unit arranged at a predetermined position of the first cuff, that detects a first arterial volume signal at the peripheral site, wherein the measurement control unit carries out a control that corrects a blood pressure value through a first calculation using control initial cuff pressure, which represents a cuff pressure in a state where an inner pressure and an outer pressure of an artery of the peripheral site are in equilibrium, and the upper arm V  and through a second calculation using a volume compensation method blood pressure obtained according to the first cuff pressure signal, and the correction value, so as to obtain a corrected blood pressure such that: wherein the measurement control unit carries out an arterial volume constant control based on the first arterial volume signal to continuously measure the blood pressure, wherein the control initial cuff pressure corresponds to an initial cuff pressure representing a reference value of the first cuff pressure signal in the arterial volume constant control, and wherein the measurement control unit: detects a maximum value of a volume change signal of the peripheral site from the first arterial volume signal in a process of gradually pressurizing or depressurizing the pressure of the first cuff to detect a volume value in a state where the inner pressure and the outer pressure of the artery of the peripheral site are in equilibrium as a control target value in the arterial volume constant control and to detect a value of the first cuff pressure signal corresponding to a time point when the control target value is detected as the initial cuff pressure; determines the cuff pressure obtained when a difference between the value of the first arterial volume signal and the control target value becomes smaller than or equal to a predetermined value when the arterial volume constant control is carried out, as a temporary blood pressure value; and corrects the temporary blood pressure value according to a difference between the upper arm V