Technological advancements are opening the possibility of prolonged monitoring of
physiological parameters under daily-life conditions, with potential applications in sport …

The non-invasive estimation of blood oxygen saturation (SpO2) by pulse oximetry is of vital
importance clinically, from the detection of sleep apnea to the recent ambulatory monitoring …

Photoplethysmography (PPG) is a valuable technique for noninvasively evaluating
physiological parameters. However, traditional PPG devices have significant limitations in …

This work demonstrates that accurate hear beat monitoring, via photoplethysmography
(PPG), can be performed at micro-power consumption level with an ear worn device. This is …

Despite the clinical importance of pulse oximetry, the precise nature of the interaction of light
with tissue, which underlies the technique, is not yet fully understood. The limitations of the …

The brain is the most metabolically active organ in the body, which increases its metabolic
activity and, thus, oxygen consumption, with increasing cognitive demand. This motivates us …

This paper presents a wearable optical health monitoring device embedding a monolithic
sensor chip with newly designed pixels, and an optical module optimized for …

Novel hearable technology is securely and comfortably positioned within the ear canal
minimizing inaccuracies caused by accessory movements during activities. Despite …

Current oxygen delivery modes lack monitoring and can be cumbersome for patients with
chronic respiratory diseases. Integrating a pulse oximeter and nasal oxygen cannulas into …

Photoplethysmography (PPG) is a noninvasive optical technique that measures blood
volume changes [1]. In PPG, light is shone in tissue and the backscattered light is measured …