PROBLEM TO BE SOLVED: To provide a pulse wave measurement device capable of measuring a pulse wave propagation velocity with high precision.SOLUTION: A pulse wave measurement device 1 includes: a blood vessel diameter measurement unit 43 measuring a temporal change in a blood vessel diameter and outputting a diameter change waveform a differentiation operation unit 44 differentiating the diameter change waveform and outputting a differentiated waveform a low-frequency wave extraction unit 45 calculating a low-frequency waveform obtained by extracting low-frequency components having frequencies not exceeding a cut-off frequency in the differentiated waveform a memory 28 storing selection chart data 36 for selecting a cut-off frequency and a velocity calculation unit 48 calculating a pulse wave propagation velocity from temporal differences of the low-frequency waveform at a plurality of positions. The low-frequency wave extraction unit 45 includes: a frequency distribution calculation unit 46 calculating a frequency distribution of the differentiated waveform and a cut-off frequency calculation unit 47 calculating a cut-off frequency using the frequency distribution and the selection chart data 36.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】脈波伝播速度を精度良く計測することができる脈波計測装置を提供する。【解決手段】脈波計測装置1は血管径の時間変化を計測して径変化波形を出力する血管径計測部43と、径変化波形を微分演算して微分波形を出力する微分演算部44と、微分波形における遮断周波数以下の低周波成分を抽出した低周波波形を演算する低周波抽出部45と、遮断周波数を選定するための選定表データ36を記憶するメモリー28と、複数の位置における低周波波形の時間差から脈波伝播速度を演算する速度演算部48と、を備え、低周波抽出部45は、微分波形の周波数分布を演算する周波数分布演算部46と、周波数分布と選定表データ36とを用いて遮断周波数を演算する遮断周波数演算部47と、を備える。【選択図】図3
