Method, system and program product for analyzing pulse wave data

An analyzing program product for extracting biometric information from pulse wave data taken from a living body, said analyzing program product comprising:

• a non-transitory computer readable recording medium;
• and
• a pulse wave data analyzing program recorded on non-transitory computer readable said recording medium, wherein said pulse wave data analyzing program causes a data analyzer for analyzing the pulse wave data to:
• read out the pulse wave data varying along a time axis acquired by measuring a pulse wave of a subject at specified sampling intervals;
• successively detect bottom peak values and top peak values of the pulse wave data;
• combine two adjacent bottom and top peak values detected in succession along the time axis in pairs;
• calculate a bottom-to-top amplitude value which is a difference between the bottom and top peak values of each successive pair along the time axis;
• compare a first peak-to-peak amplitude value and a second peak-to-peak amplitude value which correspond to two successive bottom-to-top amplitude values occurring in succession along the time axis;
• classify the bottom and top peak values related to the second peak-to-peak amplitude value as temporarily erased data if the ratio of the second peak-to-peak amplitude value to the first peak-to-peak amplitude value is smaller than a preset threshold;
• compare the second peak-to-peak amplitude value with a third peak-to-peak amplitude value which occurs in succession to the second peak-to-peak amplitude value;
• restore the temporarily erased bottom and top peak values related to the second peak-to-peak amplitude value as data to be used for pulse wave data analysis by canceling classification of the bottom and top peak values related to the second peak-to-peak amplitude value as the temporarily erased data if the ratio between the second and third peak-to-peak amplitude values is larger than the preset threshold;
• completely erase the temporarily erased bottom and top peak values related to the second peak-to-peak amplitude value by regarding the bottom and top peak values as noise if the ratio between the second and third peak-to-peak amplitude values is not larger than the preset threshold;
• and
• perform specific pulse wave analysis on the pulse wave data from which the noise has been removed.