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KMID : 1003820070110020001
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Journal Of The Korea Institute Of Oriental Medical Diagnostics
2007 Volume.11 No. 2 p.1 ~ p.12
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Change of the Finger Photoplethysmographic Pulse Shape According to Decrease of Harmonics
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Han Kyung-Sook
Nam Tong-Hyun
Shin Sang-Hoon
Park Young-Jae
Park Young-Bae
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Abstract
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Objectives: The aim of the present investigation was to determine whether the finger photoplethysmographic waveform of a healthy young man will become analogous to those of healthy old men when the photoplethysmographic harmonic components in the young man decrease.
Methods and Results: The finger photoplethysgmoraphy was measured in 21 old men over the age of 60 years and a young men. We acquired the representative pulse waveform of old man by averaging the finger photoplethysmographic waveforms measured in the old men. after the photoplethysmographic harmonic components in the young man were diminished with notch filtering, we compared the representative pulse waveform of old man and the pulse waveforms of which the harmonic components decreased in the young man. The finger photoplethysmographic waveform of the young man became analogous to those of the old men as the photoplethysmographic harmonic components in the young man were diminished with notch filtering.
Conclusions: Decrease of the second harmonic component may be a precondition of typical age-related change of the pulse waveform.
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KEYWORD
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Photoplethysmography, spectrum analysis, harmonics
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