Results 91 to 100 of about 17,709 (302)

Photoplethysmography in the assessment of venous insufficiency [PDF]

Journal of Vascular Surgery, 1987
Photoplethysmography has been used simultaneously with ambulatory venous pressure measurements to study 32 patients. Of the 62 limbs studied, 24 were normal, 20 had primary varicose veins, and 18 had deep valvular incompetence. The results indicate that the photoplethysmographic refilling time can provide a good separation between the three groups when
A N, Nicolaides, C, Miles
openaire   +2 more sources

Classifying sepsis from photoplethysmography

Health Information Science and Systems, 2022
Abstract Purpose Sepsis is a life-threatening organ dysfunction. It is caused by a dysregulated immune response to an infection and is one of the leading causes of death in the intensive care unit (ICU). Early detection and treatment of sepsis can increase the survival rate of patients.
Sara Lombardi, Petri Partanen, Piergiorgio Francia, Italo Calamai, Rossella Deodati, Marco Luchini, Rosario Spina, Leonardo Bocchi   +7 more
openaire   +3 more sources

Noise‐Blocking Interfacial Lamination of Small‐Molecule Acceptors for Enhanced Signal Clarity in Organic Photodetectors

Carbon Energy, EarlyView.
The structural design strategy employing the Y6‐BO interfacial lamination suppresses dark current by limiting solvent‐induced interfacial damage through the formation of uniformly arranged interfaces while optimizing charge transport to achieve superior detectivity.
Jihyun Lim, Hyunguk Park, Woongsik Jang, Jae Hyun Jeong, Dong Hwan Wang   +4 more
wiley   +1 more source

A Novel Photoplethysmography Sensor for Vital Signs Monitoring from the Human Trachea

Biosensors, 2019
Current pulse oximeter sensors can be challenged in working accurately and continuously in situations of reduced periphery perfusion, especially among anaesthetised patients.
James M. May, Justin P. Phillips, Tracey Fitchat, Shankar Ramaswamy, Saowarat Snidvongs, Panayiotis A. Kyriacou   +5 more
doaj   +1 more source

Subject-Independent per Beat PPG to Single-Lead ECG Mapping

Information, 2023
In this paper, a beat-based autoencoder is proposed for mapping photoplethysmography (PPG) to a single-lead electrocardiogram (single-lead ECG) signal.
Khaled M. Abdelgaber, Mostafa Salah, Osama A. Omer, Ahmed E. A. Farghal, Ahmed S. Mubarak   +4 more
doaj   +1 more source

Continuous intraoperative perfusion monitoring of free microvascular anastomosed fasciocutaneous flaps using remote photoplethysmography

Scientific Reports, 2023
Flap loss through limited perfusion remains a major complication in reconstructive surgery. Continuous monitoring of perfusion will facilitate early detection of insufficient perfusion. Remote or imaging photoplethysmography (rPPG/iPPG) as a non-contact,
S. Schraven, Benjamin Kossack, D. Strüder, Maximillian Jung, Lotte Skopnik, Justus Gross, A. Hilsmann, P. Eisert, R. Mlynski, E. Wisotzky   +9 more
semanticscholar   +1 more source

Advances in vital‐sign prediction and early‐warning models for underground coal mine workers integrating environmental factors

Deep Underground Science and Engineering, EarlyView.
This review synthesizes advances in predicting miners' vital signs by integrating environmental monitoring (dust, temperature, and gas) with physiological data. It highlights multi‐source data fusion techniques and early‐warning models for enhanced occupational safety in underground coal mines.
Junji Zhu, Dawei Cui, Yingjie Liu, Yuntao Liang, Yue Zhang   +4 more
wiley   +1 more source

Organic Photodetectors and Sensors for Low‐Light and Infrared Applications

Electron, EarlyView.
This mini review highlights recent advances in organic photodetectors and sensors for low‐light and infrared applications, emphasizing molecular design, device architectures, and interface engineering that improve charge transport, detectivity, speed, and spectral selectivity.
Swarup Biswas, Hyeok Kim
wiley   +1 more source

Application of Photoplethysmography Combined with Deep Learning in Postoperative Monitoring of Flaps

Zhongguo yiliao qixie zazhi
ObjectivePhotoelectric volumetric tracing (PPG) exhibits high sensitivity and specificity in flap monitoring. Deep learning (DL) is capable of automatically and robustly extracting features from raw data.
Jing YANG, Xinlei YANG, Yuwei GAO, Chunlei ZHANG, Di WANG, Tao SONG   +5 more
doaj   +1 more source

Recommendations for evaluating photoplethysmography-based algorithms for blood pressure assessment

Communications Medicine
Photoplethysmography (PPG) is a non-invasive optical technique that measures changes in blood volume in the microvascular tissue bed of the body. While it shows potential as a clinical tool for blood pressure (BP) assessment and hypertension management ...
M. Elgendi, Fridolin Haugg, Richard Ribón Fletcher, John Allen, Hangsik Shin, A. Alian, Carlo Menon   +6 more
semanticscholar   +1 more source