scholarly journals Integrated Multi-channel PPG and ECG System for Cardiovascular Risk Assessment

Proceedings ◽  
2019 ◽  
Vol 27 (1) ◽  
pp. 8 ◽  
Author(s):  
David Perpetuini ◽  
Antonio Maria Chiarelli ◽  
Vincenzo Vinciguerra ◽  
Piergiusto Vitulli ◽  
Sergio Rinella ◽  
...  
Keyword(s):  
Cardiovascular Risk ◽  
Arterial Stiffness ◽  
Pressure Wave ◽  
Large Scale ◽  
Near Infrared ◽  
Infrared Light ◽  
Invasive Technique ◽  
Cardiovascular Risk Assessment ◽  
Non Invasive ◽  
Cuff Occlusion

Photoplethysmography (PPG) is a non-invasive technique that employs near infrared light to estimate periodic oscillations in blood volume within arteries caused by the pulse pressure wave. Importantly, combined Electrocardiography (ECG) and PPG can be employed to quantify arterial stiffness. The capabilities of a home-made multi-channel PPG-ECG device (7 PPG probes, 4 ECG derivations) to evaluate arterial ageing were assessed. The high numerosity of channels allowed to estimate arterial stiffness at multiple body locations, without supra-systolic cuff occlusion, providing a fast and accurate examination of cardiovascular status and potentially allowing large scale clinical screening of cardiovascular risk.

Non-invasive neuroimaging using near-infrared light

2002 ◽  
Vol 52 (7) ◽  
pp. 679-693 ◽  
Author(s):  
Gary Strangman ◽  
David A Boas ◽  
Jeffrey P Sutton
Keyword(s):  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Non Invasive

Near-Infrared Light Emitting Diode Based Non-Invasive Glucose Detection System

2019 ◽  
Vol 19 (10) ◽  
pp. 6187-6191 ◽  
Author(s):  
Seung Ho Lee ◽  
Min Seok Kim ◽  
Ok-Kyun Kim ◽  
Hyung-Hwan Baik ◽  
Ji-Hye Kim
Keyword(s):  
Near Infrared ◽  
Detection System ◽  
Light Emitting Diode ◽  
Infrared Light ◽  
Glucose Detection ◽  
Near Infrared Light ◽  
Light Emitting ◽  
Non Invasive

scholarly journals Photobiomodulation for Alzheimer’s Disease: Has the Light Dawned?

Photonics ◽  
2019 ◽  
Vol 6 (3) ◽  
pp. 77 ◽  
Author(s):  
Michael Hamblin
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Clinical Trials ◽  
Near Infrared ◽  
Infrared Light ◽  
Western World ◽  
Diverse Range ◽  
Non Invasive ◽  
Dementia Patients ◽  
Relieve Pain

Next to cancer, Alzheimer’s disease (AD) and dementia is probably the most worrying health problem facing the Western world today. A large number of clinical trials have failed to show any benefit of the tested drugs in stabilizing or reversing the steady decline in cognitive function that is suffered by dementia patients. Although the pathological features of AD consisting of beta-amyloid plaques and tau tangles are well established, considerable debate exists concerning the genetic or lifestyle factors that predispose individuals to developing dementia. Photobiomodulation (PBM) describes the therapeutic use of red or near-infrared light to stimulate healing, relieve pain and inflammation, and prevent tissue from dying. In recent years PBM has been applied for a diverse range of brain disorders, frequently applied in a non-invasive manner by shining light on the head (transcranial PBM). The present review discusses the mechanisms of action of tPBM in the brain, and summarizes studies that have used tPBM to treat animal models of AD. The results of a limited number of clinical trials that have used tPBM to treat patients with AD and dementia are discussed.

Decreased cerebral haemodynamic response to cognitive and physiological tasks in mood disorders as shown by near-infrared spectroscopy

2002 ◽  
Vol 32 (6) ◽  
pp. 1029-1037 ◽  
Author(s):  
K. MATSUO, ◽  
N. KATO ◽  
T. KATO
Keyword(s):  
Infrared Spectroscopy ◽  
Mood Disorders ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Poor Response ◽  
Biological Tissues ◽  
Functional Brain Imaging ◽  
Infrared Light ◽  
Invasive Technique ◽  
Physiological Tasks

Background. Hypofrontality has been demonstrated in mood disorders by functional brain imaging methods such as positron emission tomography. However, the neurobiological basis of hypofrontality has not been well clarified. Near-infrared spectroscopy (NIRS) is a non-invasive technique for continuous monitoring of alterations in oxygenated (oxyHb) and deoxygenated (deoxyHb) haemoglobin using near-infrared light, which penetrates biological tissues.Methods. We used NIRS during cognitive and physiological tasks to investigate alterations of haemoglobin oxygenation in the frontal region of euthymic patients with mood disorders (major depressive disorder (MD) and bipolar disorder (BP)) and in controls.Results. The increase of oxyHb during a verbal fluency task was significantly less in the MD and the BP groups than in the controls. The MD group showed a significantly smaller decrease of oxyHb during hyperventilation than the controls. The BP group also showed a similar trend.Conclusions. These findings suggest that the hypofrontality in mood disorders may be associated with a poor response in the cerebral blood vessels to neuronal and chemical stimuli.

scholarly journals Infrared Spectroscopy and Chemometric Applications for the Qualitative and Quantitative Investigation of Grapevine Organs

2021 ◽  
Vol 12 ◽  
Author(s):  
Elizma van Wyngaard ◽  
Erna Blancquaert ◽  
Hélène Nieuwoudt ◽  
Jose Luis Aleixandre-Tudo
Keyword(s):  
Infrared Spectroscopy ◽  
Large Scale ◽  
Data Science ◽  
Near Infrared ◽  
Critical Evaluation ◽  
Quantitative Investigation ◽  
Qualitative And Quantitative ◽  
Non Invasive ◽  
Agricultural Revolution ◽  
Using Data

The fourth agricultural revolution is leading us into a time of using data science as a tool to implement precision viticulture. Infrared spectroscopy provides the means for rapid and large-scale data collection to achieve this goal. The non-invasive applications of infrared spectroscopy in grapevines are still in its infancy, but recent studies have reported its feasibility. This review examines near infrared and mid infrared spectroscopy for the qualitative and quantitative investigation of intact grapevine organs. Qualitative applications, with the focus on using spectral data for categorization purposes, is discussed. The quantitative applications discussed in this review focuses on the methods associated with carbohydrates, nitrogen, and amino acids, using both invasive and non-invasive means of sample measurement. Few studies have investigated the use of infrared spectroscopy for the direct measurement of intact, fresh, and unfrozen grapevine organs such as berries or leaves, and these studies are examined in depth. The chemometric procedures associated with qualitative and quantitative infrared techniques are discussed, followed by the critical evaluation of the future prospects that could be expected in the field.

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