Optical pulse detection 'photoplethysmography'(PPG) provides a means of low cost and
unobtrusive physiological monitoring that is popular in many wearable devices. However …

Optical sensors play an increasingly important role in the development of medical diagnostic
devices. They can be very widely used to measure the physiology of the human body …

The coronavirus disease 19 (COVID-19) pandemic that has been raging in 2020 does affect
not only the physical state but also the mental health of the general population, particularly …

Patients with the COVID-19 condition require frequent and accurate blood oxygen saturation
(SpO2) monitoring. The existing pulse oximeters, however, require contact-based …

The scalable production of nanomaterials‐based electronic components with mechanically
compliable form factors not only provides interesting research topics but also ushers in …

Introduction Respiratory diseases such as chronic obstructive pulmonary disease,
obstructive sleep apnea syndrome, and COVID-19 may cause a decrease in arterial oxygen …

Photoplethysmography (PPG) is a highly promising device due to its advantages in
portability, user-friendly operation, and non-invasive capabilities to measure a wide range of …

Clinical devices play a vital role in diagnosing and monitoring people's health. A pulse
oximeter (PO) is one of the most common clinical devices for critical medical care. In this …

Heart rate (HR) as an important physiological indicator could properly describe global
subject's physical status. Photoplethysmographic (PPG) sensors are catching on in field of …

Continuous vital signs monitoring is an important aid for preventing, diagnosing and timely
treating different pathologies, especially in the field of cardiovascular and respiratory …