| 摘要 |
An apparatus (8) for non-invasively estimating a waveform of a blood pressure in a central artery, including a detecting device (38) which non-invasively detects a pressure pulse wave from a first portion of a peripheral artery, a first determining means (92) for determining, according to a vascular-system model (94), a difference between a blood pressure at the first portion of the peripheral artery and a blood pressure at an end of the same, based on the detected pressure pulse wave, a first estimating means (104) for estimating, based on the detected pressure pulse wave and the determined difference, a waveform of a forward pressure pulse wave at the first portion and a waveform of a backward pressure pulse wave at the first portion, a second determining means (106) for determining a propagation time in which the pressure pulse wave propagates from a second portion of the central artery to the first portion of the peripheral artery, and a second estimating means (108) for estimating, based on the respective estimated waveforms of the forward and backward pressure pulse waves and the determined propagation time, a waveform of a forward pressure pulse wave at the second portion and a waveform of a backward pressure pulse wave at the second portion, and estimating a waveform of a blood pressure at the second portion by adding the respective estimated waveforms of the forward and backward pressure pulse waves at the second portion. <IMAGE> |
