Patent ID: 6746405
Filing Date: 2004-06-08
Classification: A61B

Abstract:
A blood pressure measuring apparatus, comprising a cuff which is adapted to be worn on a body portion of a living subject, said blood pressure measuring apparatus determining a blood pressure value of the subject based on a signal which is obtained from the cuff when a pressure in the cuff is changed, wherein the improvements comprise:a cuff pulse wave detecting device which detects a cuff pulse wave as a pulse wave which is produced from an artery of the subject and is transmitted to the cuff, the cuff pulse wave comprising at least one heartbeat-synchronous pulse which is produced from the artery in synchronism with at least one heartbeat of the subject; a converting means for converting, based on the blood pressure value determined by the apparatus, a magnitude of each point of the heartbeat-synchronous pulse of the cuff pulse wave, into a pressure value; and a pseudo-pressure-pulse-wave determining means for determining a pseudo pressure pulse wave by correcting the respective pressure values of the respective points of the heartbeat-synchronous pulse, provided by the converting means, according to at least one correction relationship between (A) a proportion of the difference of pressure values of each point of heartbeat-synchronous pulse from a pressure value of minimum point of the pulse, to pulse pressure which is the difference of the pressure value of maximum point of the pulse from the pressure value of the minimum point of the pulse, and (B) correction amount, in which greater correction amount corresponds to greater proportion.