An Electronic Patch for Wearable Health Monitoring by Reflectance Pulse Oximetry

Haahr, Rasmus Grønbek; Duun, Sune; Toft, Mette; Belhage, Bo; Larsen, Jan; Birkelund, Karen; Thomsen, Erik Vilain

doi:10.1109/tbcas.2011.2164247

Cited by 81 publications

(37 citation statements)

References 23 publications

(31 reference statements)

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“…1, this represents a change in power at 100% efficiency from 20 fW to over 10 pW. Further improvements of thermo-electric pumping designs could be relevant to the design of ultralow power (sub-lW) pulseoximetry systems for healthcare applications 17,18 and low power (>100 lW) gas detection systems, 19 where low-power infrared LED inefficiency creates a bottleneck for minimizing system power consumption.…”

Section: -4mentioning

confidence: 99%

Design for enhanced thermo-electric pumping in light emitting diodes

Gray

Santhanam

Ram

2013

Applied Physics Letters

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We present a strategy for optimization of thermo-electric pumping in light emitting diodes (LEDs). We use a finite element model for charge transport in a GaInAsSb/GaSb double hetero-junction LED that is verified experimentally to consider optimal design and operation of low-bias LEDs. The wall-plug efficiency is shown to be enhanced by over 200× at nanowatt power levels and 20× at microwatt power levels. A design for room-temperature operation of a 2.2 μm LED with 100% efficiency is proposed—this represents a 110 °C reduction of the temperature required to observe unity efficiency.

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Section: -4mentioning

confidence: 99%

Design for enhanced thermo-electric pumping in light emitting diodes

Gray

Santhanam

Ram

2013

Applied Physics Letters

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“…This potentially provides an advantage for extremely low-birth-weight infants with very fragile skin. More recently, wearable sensors have been integrated into smartwatches, bracelets or glasses, which use infrared and visible-light LED lenses and photodiode sensors to measure HR [36,37]. An HR sensor could also be sewn into clothing or blankets [38].…”

Section: Potential Future Developmentsmentioning

confidence: 99%

Heart Rate Assessment Immediately after Birth

et al. 2015

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Background: Heart rate assessment immediately after birth in newborn infants is critical to the correct guidance of resuscitation efforts. There are disagreements as to the best method to measure heart rate. Objective: The aim of this study was to assess different methods of heart rate assessment in newborn infants at birth to determine the fastest and most accurate method. Methods: PubMed, EMBASE and Google Scholar were systematically searched using the following terms: ‘infant', ‘heart rate', ‘monitoring', ‘delivery room', ‘resuscitation', ‘stethoscope', ‘auscultation', ‘palpation', ‘pulse oximetry', ‘electrocardiogram', ‘Doppler ultrasound', ‘photoplethysmography' and ‘wearable sensors'. Results: Eighteen studies were identified that described various methods of heart rate assessment in newborn infants immediately after birth. Studies examining auscultation, palpation, pulse oximetry, electrocardiography and Doppler ultrasound as ways to measure heart rate were included. Heart rate measurements by pulse oximetry are superior to auscultation and palpation, but there is contradictory evidence about its accuracy depending on whether the sensor is connected to the infant or the oximeter first. Several studies indicate that electrocardiogram provides a reliable heart rate faster than pulse oximetry. Doppler ultrasound shows potential for clinical use, however future evidence is needed to support this conclusion. Conclusion: Heart rate assessment is important and there are many measurement methods. The accuracy of routinely applied methods varies, with palpation and auscultation being the least accurate and electrocardiogram being the most accurate. More research is needed on Doppler ultrasound before its clinical use.

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“…5. Pulse oximetry sensor: These types of sensors [72][73][74][75] are used for the measurement of oxygen saturation level in blood. The sensor is attached one part of the body, and the signal goes to the monitor with the cable attached to the sensor.…”

Section: Sensors For Physiological Parameters Monitoringmentioning

confidence: 99%

Wearable Electronics Sensors: Current Status and Future Opportunities

Nag

Mukhopadhyay

2015

Wearable Electronics Sensors

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Abstract. The technological advancement in the past three decades has impacted our lives and wellbeing significantly. Different aspects of monitoring our physiological parameters are considered. Wearable sensors are one of its most important areas that have an ongoing trend and have a huge tendency to rise in the future. The wearable sensors are the externally used devices attached to any individual to measure physiological parameters of interest. The range of wearable sensors varies from minuscule to large scaled devices physically fitted to the user operating on wired or wireless terms. Many common diseases affecting large number of people notably gait abnormalities, Parkinson's disease are analysed by the wearable sensors. The use of wearable sensors has got a better prospect with improved technical qualities and a better understanding of the currently used research methodologies. This chapter deals with the overview of the current and past means of wearable sensors with its associated protocols used for communication. It concludes with the ways the currently dealt wearable sensors can be improved in future.

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An Electronic Patch for Wearable Health Monitoring by Reflectance Pulse Oximetry

Cited by 81 publications

References 23 publications

Design for enhanced thermo-electric pumping in light emitting diodes

Design for enhanced thermo-electric pumping in light emitting diodes

Heart Rate Assessment Immediately after Birth

Wearable Electronics Sensors: Current Status and Future Opportunities

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