The article deals with the investigation of pulse wave propagation in arteries. A part of work involves also design and realization of devices serving for scanning of pulse wave by reflective photoplethysmography. The work describes a use of microcontroller serving for data flow control, communication and analog signal digitalization using integrated analog to digital converter.

This paper introduces the design of a new wearable photoplethysmography (PPG) sensor and its assessment for mental distress estimation. In our design, a PPG sensor obtains blood volume information by means of an optical plethysmogram technique. A number of temporal, morphological and frequency markers are computed using time intervals between adjacent normal cardiac cycles to characterize pulse...

Continuously monitoring and efficiently managing pain has become an important issue. However, no study has investigated a change in physiological parameters during the process of pain production/relief. This study modeled the process of pain production/relief using ramped thermal stimulation (no pain: 37°C water, process of pain production: a heating rate of 1°C/min, and subject feels pain: wat...

Turcott RG, Pavek TJ. Hemodynamic sensing using subcutaneous photoplethysmography. Am J Physiol Heart Circ Physiol 295: H2560 –H2572, 2008. First published October 10, 2008; doi:10.1152/ajpheart.00574.2008.—Pacemakers and implantable defibrillators presently operate without access to hemodynamic information. If available, such data would allow tailoring of delivered therapy according to perfusi...

We investigate the temporal dynamics of learners’ affective states (e.g., engagement, boredom, confusion, frustration, etc.) during video-based learning sessions in Massive Open Online Courses (MOOCs) in a 22-participant user study. We also show the feasibility of predicting learners’ moment-tomoment affective states via implicit photoplethysmography (PPG) sensing on unmodified smartphones.

Abstract Photoplethysmography (PPG) is a simple and inexpensive technology used in many smart devices to monitor cardiovascular health. The PPG sensors use LED lights penetrate into the bloodstream detect different blood volume changes tissue through skin contact by sensing amount of light that hits sensor. Typically, data are displayed on graph it forms pulse waveform. information from produce...

This paper describes the application of multiwavelength photoplethysmography (MW-PPG) in reflectance mode for noninvasive measurements total hemoglobin concentration. Consumer wrist-wearable devices (smartwatches, wristbands) typically contain a sensor operating mode, as opposed to clinical pulse-oximetry sensors transmittance mode. We assume that generally accepted approach analysis transmitta...