Nitto-Denko Corporation

Somchai Baotong

Visit Thaveeprungsriporn

Srisuda Aphaipanan

Estanislao Glenn Bondice

Wiputpong Klinsukon

Amornsri Khitwongwattana

Suppasit Chuwatsawat

Disclosed is a photoplethysmography (PPG) apparatus () for determining physiological changes, comprising: a light source to emit alight signal having a variable intensity dependent on a skin characteristic; first and second photodetectors () operable to detect a reflection of the light signal to provide a combined current signal; and a signal processing circuit operable to convert the current signal into a PPG signal for determining the physiological changes.

Photoplethysmography (PPG) apparatus and method for determining physiological changes

A method () of deriving systolic blood pressure and/or diastolic blood pressure of a subject is disclosed. The method comprises: (i) receiving () data related to at least one cardiac cycle of a bio-signal from the subject; (ii) calculating () a rise time and a fall time of the at least one cardiac cycle based on the received data; (iii) calculating () a parameter derived from a function of the rise time and fail time; and (iv) determining () the systolic blood pressure and/or diastolic blood pressure of the subject based on the calculated parameter. A related apparatus is also disclosed.

Method of deriving systolic blood pressure and/or diastolic blood pressure of a subject

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Singapore, Singapore

Somchai Baotong