Photoplethysmography is one of the optical techniques has been developed for experimental use in vascular
disease. It has several advantages over other traditional experimental approaches. Because of its non-invasive, safe, costeffective
and easy-to-use properties, it is considered as a useful diagnostic tool. The further developments in the Photoplethysmograph
may replace it among other tools used in the assessment of vascular diseases such as blood test and ultrasound.
This overview discusses the different terminologies used for the photoplethysmograph and reveals the research
discontinuity among different disciplines. Moreover, it suggests standard terminologies as a resolution for a confusion
persisted for more than 50 years.
Keywords: Plethysmogram, acceleration photoplethysmogram, second derivative photoplethysmogram, digital volume pulse,
pulse wave, pulse oximeter
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