Patent ID: 8777865
Filing Date: 2014-07-15
Classification: A61B

Abstract:
1. A blood pressure information measurement device that measures blood pressure information by detecting a volume of an artery, the blood pressure information measurement device comprising: a cuff to be wrapped around a predetermined measurement site; a pressure adjustment unit that adjusts a pressure of the cuff by pressurization and depressurization; a pressure detection unit that detects a cuff pressure representing the pressure of the cuff; a volume detection unit, arranged at a predetermined position of the cuff, that detects an arterial volume signal indicating the volume of the artery; a detection processing unit that detects a control target value based on the arterial volume signal; a servo control unit that performs a servo control of the pressure adjustment unit so that a value of the arterial volume signal matches the control target value; and a fluctuation detection unit that detects a rapid fluctuation of the arterial volume signal at an initial stage during a period of the servo control, wherein the fluctuation detection unit determines that the rapid fluctuation occurred when a control deviation representing a level of the arterial volume signal having the control target value as a reference becomes greater than or equal to a predetermined magnification of a reference deviation, and wherein the blood pressure information measurement device further comprises an adjustment processing unit that adjusts a control amount of the pressure adjustment unit by the servo control unit so that an excessive response is not made when the rapid fluctuation is detected by the fluctuation detection unit.