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Séance de cours

Oximétrie des impulsions: Estimation de la saturation en oxygène par hémoglobine

Dans cours

MICRO-568: Seminar in physiology and instrumentation

Acquérir la connaissance de l'état de l'art dans l'instrumentation bio-médicale. Comprendre la physiologie associée aux techniques de mesures. ...

Description

Cette séance de cours couvre les principes et les progrès de l'oxymétrie des impulsions, une technique non invasive pour estimer la saturation en oxygène de l'hémoglobine. Il traite du rôle de l'hémoglobine dans le transport de l'oxygène, de l'optique du sang, des limites, de la précision et des spécifications de précision, ainsi que des perspectives futures et des aspects commerciaux des oxymètres de pouls.

Enseignant·e·s (3)

Philippe Renaud

Philippe Renaud is Professor at the Microsystem Laboratory (LMIS4) at EPFL. He is also the scientific director of the EPFL Center of MicroNanoTechnology (CMI). His main research area is related to micronano technologies in biomedical applications (BioMEMS) with emphasis on cell-chips, nanofluidics and bioelectronics. Ph. Renaud is invloved in many scientifics papers in his research area. He received his diploma in physics from the University of Neuchâtel (1983) and his Ph.D. degree from the University of Lausanne (1988). He was postdoctoral fellow at University of California, Berkeley (1988-89) and then at the IBM Zürich Research Laboratory in Switzerland (1990-91). In 1992, he joined the Sensors and Actuators group of the Swiss Center for Electronics and Microtechnology (CSEM) at Neuchâtel, Switzerland. He was appointed assistant professor at EPFL in 1994 and full professor in 1997. In summer 1996, he was visiting professor at the Tohoku University, Japan. Ph. Renaud is active in several scientific committee (scientific journals, international conferences, scientific advisory boards of companies, PhD thesis committee). He is also co-founder of the Nanotech-Montreux conference. Ph. Renaud is committed to valorization of basic research through his involvement in several high-tech start-up companies.

Aleksandra Radenovic

From April 2021 Full Professor 2015 -2021 Associate Professor2008-2015 Tenure-Track Assistant Professor2004-2007 Postdoc at the University of California, Berkeley in the group of Prof.Liphardt2003 PhD student of Prof. Dietler in Laboratory of Physics of Living Matter, University of Lausanne 1999 Diploma thesis on the subject of the Raman spectroscopy of beta carotene1994-1999 Physics department at the University of Zagreb1994 baccalaureate, Classical gymnasium

Kamiar Aminian

Kamiar Aminian received the M.S. degree in electrical engineering in 1982, the Ph.D degree in biomedical engineering in 1989 and the Postgraduate degree on technical computing in 1993 from Ecole Polytechnique Fédérale de Lausanne (EPFL). He was assistant professor (1994-1996) with Sharif University of Technology (Tehran). He joint EPFL in 1996 where he is currently Professor of medical instrumentation and the director of the Laboratory of Movement Analysis and Measurement in the Institute of Bioengineering of EPFL. His research interests include methodologies for human movement monitoring and analysis in real world conditions mainly based on wearable technologies and inertial sensors with emphasis on gait, physical activity and sport. His research aims to perform outcome evaluation in orthopaedics, to improve motor function and intervention programs in aging and patients with movement disorders and pain, and to identify metrics of performance in sport science. Kamiar Aminian is a member of the International Society of Posture and Gait Research, the Institute of Electrical and Electronics Engineers, the European Society of Movement Analysis in Adults and Children, the Prevention of fall Network Europe, the Intentional Society of Biomechanics and the President of the 3D analysis of the human movement group. He is author or co-author of more than 450 scientific papers published in reviewed journals and presented at international conferences and holds 10 patents related to medical devices. Full CV ORCID

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Concepts associés (20)

Oxymétrie colorimétrique

vignette|droite|Oxymètre de pouls sur le doigt, affichant la saturation en oxygène et la fréquence cardiaque (modèle 2014) vignette|droite|Oxymètre de pouls monté au poignet (modèle 2011) L' ou oxymétrie de pouls ou saturation pulsée en oxygène (Sp) est un examen non invasif d'oxymétrie permettant de quantifier la saturation en oxygène de l'hémoglobine au niveau des capillaires sanguins. L'appareil de mesure s'appelle oxymètre de pouls ou saturomètre. Les deux variables biométriques mesurées sont la Sp et la fréquence cardiaque.

Oxygen saturation (medicine)

Oxygen saturation is the fraction of oxygen-saturated hemoglobin relative to total hemoglobin (unsaturated + saturated) in the blood. The human body requires and regulates a very precise and specific balance of oxygen in the blood. Normal arterial blood oxygen saturation levels in humans are 97–100 percent. If the level is below 90 percent, it is considered low and called hypoxemia. Arterial blood oxygen levels below 80 percent may compromise organ function, such as the brain and heart, and should be promptly addressed.

Hémoglobine

L'hémoglobine, couramment symbolisée Hb, parfois Hgb, est un pigment respiratoire (de la famille moléculaire des métalloprotéines, ici contenant du fer) présent essentiellement dans le sang des vertébrés, au sein de leurs globules rouges, ainsi que dans les tissus de certains invertébrés. Elle a pour fonction de transporter l'oxygène depuis l'appareil respiratoire (poumons, branchies) vers le reste de l'organisme. La quantité d'hémoglobine est un paramètre mesuré lors d'un hémogramme.

Sang

thumb|Au contact du dioxygène, le sang doit sa couleur rouge à l’hémoglobine. thumb|Sang humain observé (grossissement :1000) en microscopie à fond noir. Début de coagulation (en haut à droite). thumb|De gauche à droite : globule rouge, plaquette sanguine et globule blanc. Le sang est un liquide biologique vital qui circule continuellement dans les vaisseaux sanguins et le cœur, notamment grâce à la pompe cardiaque. Il est composé d'un fluide aqueux, le plasma, et de milliards de cellules, principalement les globules rouges, qui lui donnent sa couleur.

Oxygenator

An oxygenator is a medical device that is capable of exchanging oxygen and carbon dioxide in the blood of human patient during surgical procedures that may necessitate the interruption or cessation of blood flow in the body, a critical organ or great blood vessel. These organs can be the heart, lungs or liver, while the great vessels can be the aorta, pulmonary artery, pulmonary veins or vena cava. An oxygenator is typically utilized by a perfusionist in cardiac surgery in conjunction with the heart-lung machine.

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Séances de cours associées (16)

Oximétrie des impulsions: Estimation de la saturation en oxygène par hémoglobine

Explore l'oxymétrie des impulsions, une technique non invasive pour estimer la saturation en oxygène de l'hémoglobine, couvrant les principes, la précision, les applications et les perspectives futures.

Oximétrie des impulsions : principes

Explique les principes de l'oxymétrie du pouls, en se concentrant sur l'absorption de la lumière dans le sang et comment calculer la saturation en oxygène.

Application de l'absorption

Explore l'application de l'absorption de la lumière dans la photomédecine, en particulier dans l'oxymétrie des impulsions.

Dispositifs de surveillance du glucose

Couvre la teneur en oxygène du sang, l'hypoxémie, la spectrophotométrie, l'oxymétrie des impulsions, les limitations et les perspectives futures dans les dispositifs de surveillance du glucose.

Sans titre

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Concepts associés (20)

Oxymétrie colorimétrique

Oxygen saturation (medicine)