Search results for "Biomedical sensors"

showing 3 items of 3 documents

Steam sterilization processes affect the stability of clinical thermometers: Thermistor and prototypal FBG probe comparison

2020

Abstract Temperature is one of the most frequently measured physical quantities in clinical environment and a good biomarker of illness. The need for reusable probes, which have to be sterilized to prevent infections, requires the metrological qualification of thermometer probes in response to ageing effects induced by several sterilization processes. In this study, we investigated the effect of repeated sterilizations on both a commonly-used autoclavable thermistor probe and a prototypal Fiber Bragg Gratings (FBG) probe for temperature measurements. Findings highlighted a greater reliability of the proposed FBG probe than the commercial thermistor. Specifically, the FBG probe was able to w…

Accuracy and precisionMaterials science02 engineering and technology01 natural sciencesTemperature measurement010309 optics020210 optoelectronics & photonicsFiber Bragg gratingThermistor0103 physical sciences0202 electrical engineering electronic engineering information engineeringBiomedical sensorsElectrical and Electronic EngineeringInstrumentationbusiness.industryThermistorSterilizationAtomic and Molecular Physics and OpticsSteam sterilizationElectronic Optical and Magnetic MaterialsFiber Bragg Grating (FBG)Control and Systems EngineeringThermometerBiomedical sensorOptoelectronicsClinical thermometerbusinessOptical Fiber Technology
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Low invasive multisensor acquisition system for real-time monitoring of cardiovascular and respiratory parameters

2020

The recent advances in multiparametric monitoring of biosignals and management of big data prompt for the development of devices and techniques for the extraction of indicators with physiological relevance. In this context, we have designed and realized a portable electronic system, equipped with simple biomedical sensors, able to synchronously record multiple electrocardiographic (ECG), photoplethysmographic (PPG) and breathing signals, for carrying out a non-invasive monitoring of several cardiovascular parameters. In this work, we show the results of preliminary measurements performed following a specific physiological protocol (i.e., deep breathing with 10 s per cycle). The system allow…

Computer scienceWearable electronics portable system electrocardiography (ECG) photoplethysmography (PPG) heart rate variabilitySettore ING-INF/06 - Bioingegneria Elettronica E InformaticaReal-time computingBreathingExhalationBiomedical sensorsDiaphragmatic breathingHeart rate variabilityContext (language use)Stroke volumeSettore ING-INF/01 - ElettronicaElectronic systems2020 IEEE 20th Mediterranean Electrotechnical Conference ( MELECON)
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Enhanced Reflectivity Change and Phase Shift of Polarized Light: Double Parameter Multilayer Sensor

2022

Herein, the concept of point of darkness based on polarized light phase difference and absorption of light is demonstrated by simulations using low refractive index and extinction coefficient semiconductor and dielectric, and high refractive index nonoxidizing metal multilayer thin film structures. Several multilayer sensor configurations show great sensitivity to thickness and refractive index variation of the detectable material by measuring the reflectivity ratio {\Psi} and phase shift {\Delta}. Focus is on such multilayers, which have sensitivity to both parameters ({\Psi}, {\Delta}) in the visible spectral range, thus opening the possibility for further research on a new biomedical sen…

Condensed Matter - Materials ScienceMaterials sciencebusiness.industryMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesPhysics::OpticsSurfaces and InterfacesDielectricCondensed Matter PhysicsReflectivitySurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsCondensed Matter::Materials ScienceSemiconductorEllipsometryMaterials ChemistryOptoelectronicsBiomedical sensorsElectrical and Electronic EngineeringbusinessOptics (physics.optics)Physics - Opticsphysica status solidi (a)
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