Results 61 to 70 of about 7,351 (197)

Photoplethysmography-Based Heart Rate Monitoring in Physical Activities via Joint Sparse Spectrum Reconstruction

, 2015
Goal: A new method for heart rate monitoring using photoplethysmography (PPG) during physical activities is proposed. Methods: It jointly estimates spectra of PPG signals and simultaneous acceleration signals, utilizing the multiple measurement vector ...
Zhang, Zhilin
core   +1 more source

Perfusion Changes at the Forehead Measured by Photoplethysmography during a Head-Down Tilt Protocol [PDF]

, 2019
Photoplethysmography (PPG) signals from the forehead can be used in pulse oximetry as they are less affected by vasoconstriction compared to fingers.
Abay, T., Kyriacou, P. A., Shafqat, K.
core   +1 more source

Ultra‐Flexible Dual‐Band Organic Photodetectors for Visible and Near‐Infrared Sensing

Advanced Optical Materials, EarlyView.
An ultra‐flexible dual‐band organic photodetector with a total thickness of 5.6 µm for bio‐sensing is developed. It selectively detects visible and near‐infrared light with high sensitivity by switching the voltage. Peripheral oxygen saturation (SpO2) measurement is demonstrated using the device attached to a finger under a single light source by ...
Sachi Awakura, Hiroaki Jinno, Yusaku Tagawa, Ryota Fukuzawa, Masahito Takakuwa, Takao Someya, Tomoyuki Yokota   +6 more
wiley   +1 more source

Analysis of differences between contact and non-contact estimation of blood pressure

Current Directions in Biomedical Engineering
Blood pressure (BP) is a key indicator for cardiac diseases. Although many current works focus on estimating BP using photoplethysmography (PPG), the number of works using imaging PPG, i.e.
Sahl Fabienne, Zaunseder Sebastian
doaj   +1 more source

Spatio-temporal and -spectral feature maps in photoplethysmography imaging and infrared thermograph

BioMedical Engineering OnLine, 2021
Background Only a small fraction of the information available is generally used in the majority of camera-based sensing approaches for vital sign monitoring.
Michael Paul, Sabrina Caprice Behr, Christoph Weiss, Konrad Heimann, Thorsten Orlikowsky, Steffen Leonhardt   +5 more
doaj   +1 more source

Wearable and Implantable Devices for Continuous Monitoring of Muscle Physiological Activity: A Review

Advanced Science, EarlyView.
Recent advances in materials and device engineering enable continuous, real‐time monitoring of muscle activity via wearable and implantable systems. This review critically summarizes emerging technologies for tracking electrophysiological, biomechanical, and oxygenation signals, outlines fundamental principles, and highlights key challenges and ...
Zhengwei Liao, Ata Golparvar, Mohammad Javad Bathaei, Filipe Arroyo Cardoso, Clementine M. Boutry   +4 more
wiley   +1 more source

Camera-based spatial assessment of perfusion upon stimuli

Current Directions in Biomedical Engineering, 2019
Imaging photoplethysmography allows to capture spatio-temporal patterns related to the perfusion. One such approach is based on the analysis of the time delay between pulse waves at different locations by so-called phase maps. There are different ways to
Fleischhauer Vincent, Ruprecht Nora, Zaunseder Sebastian   +2 more
doaj   +1 more source

High-Reliability Non-Contact Photoplethysmography Imaging for Newborn Care by a Generative Artificial Intelligence

IEEE Access, 2023
Long-term wiring on a newborn patient could be a disguise scene for parents. Unobtrusive and reliable monitoring without wiring can be a euphoric alternative for newborns and parents in obstetrics and gynecology (OB/GYN) incubation rooms.
Yenming J. Chen, Lung-Chang Lin, Shu-Ting Yang, Kao-Shing Hwang, Chia-Te Liao, Wen-Hsien Ho   +5 more
doaj   +1 more source

Pulse oximetry in the oesophagus [PDF]

, 2005
Pulse oximetry has been one of the most significant technological advances in clinical monitoring in the last two decades. Pulse oximetry is a non-invasive photometric technique that provides information about the arterial blood oxygen saturation (SpO(2))
Alexander C M, Altman D G, Anderson I D, Anonymous, Atlee J L, Barker S J, Barker S J, Barker S J, Bland J M, Bowes W A, Challoner A V J, Clayton D G, Cote C J, Delpy D T, Dildy G A, Dorlas J C, Drummond G B, Ferrara J J, Fine I, Fluck R R, Hanning C D, Hanowell L, Higgins J L, Hovagim A R, Jay G D, Kataria B K, Kelleher J F, Kessler M R, Kidd J F, Kyriacou P A, Kyriacou P A, Kyriacou P A, Kyriacou P A, Kyriacou P A, Lambert M A, Lemaire F, Lindberg L G, Macdonald P H, Marieb E N, Mendelson Y, Minnich M E, Moller J T, Moyle J T B, Moyle J T B, Nelson D A, Nijboer J A, P A Kyriacou, Palve H, Palve H, Pearce W H, Pologe J A, Prielipp R C, Pullerits J, Ralston A C, Richardson T, Ries A L, Roberts V C, Romanes G J, Rosenberg J, Scheller M S, Severinghaus J W, Severinghaus J W, Severinghaus J W, Severinghaus J W, Severinghaus J W, Shimada Y, Sidi A, Tremper K K, Tyler I L, Volgyesi G A, Wahr J A, Webster J G, Welch J, Wray S, Yoshiya I   +74 more
core   +1 more source

The Role of Ionic Liquids at the Biological Interfaces in Bioelectronics

Advanced Science, EarlyView.
Ionic liquids (ILs) are highlighted as key artificial ionic materials that bridge biological ion‐based signaling and electronic devices. By understanding their composition, structure, function relationships, and mechanisms, ILs can advance from high performance electrolyte to core materials enabling integrated, multifunctional bioelectronics for ...
Yeong‐sinn Ye, Young Jin Jo, Ji Yeon Oh, Ju Yeon Jeong, Lili Guo, Tae‐il Kim   +5 more
wiley   +1 more source