A Method to Quantificate Pulse Waveform with Distortion Factor. Quantificate of Pulse Waveform with Engineering Technique / 日本東洋医学雑誌

In engineering, when the degrce of distortion of the waveform of the signal is expressed numerically, a coefficient called a distortion factor is used. In order to determine whether or not itis possible to quantify the difference in pulse waveforms in terms of a distortion factor, the authors carried out a Fourier analysis of the pulse waves of 74 cases (74 males between 20 and 40 years of age), calculating the distortion factor of these pulse waves. Employing the pulse wave scale devised by Zhaofu Fei et al, the Ping mai, Hua mai and Xuan mai were differentiated by means of the amplitude ratio of the dicrotic notch to the ejection wave. As a result of a comparison between the distortion factors of these three groups, the authors were successful in quantifying the differences between the wave forms in terms of a distortion factor.

A Method to Quantify Pulse Waveform with Circulatory Parameters. Quantification of Pulse Waveform with a Four-Factor Concentrated Constant Circuit Model / 日本東洋医学雑誌

A total of 120 measurements were made for pulse waveform of the radial artery in 73 male subjects in their twenties to forties. We then calculated the parameters in the four-factor concentrated constant circuit model using the method we had developed. From the waveform of the radial artery, we extracted forms equivalent to those referred to as normal, slippery, and string-like pulses according to the pulse-wave models described in the literature. By comparing these parameters, we could show quantitatively the differences in waveforms and related diagnoses of pulses.