A Wearable Cardiac Monitor for Long-Term Data Acquisition and Analysis

Winokur, Eric S.; Delano, Maggie; Sodini, C.G.

doi:10.1109/tbme.2012.2217958

Cited by 51 publications

(17 citation statements)

References 8 publications

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“…This system has more flexibility and compactness for the patients than the design in [3,27]. It only needs one sensor node in small size and avoids the time synchronization between every sensor node.…”

Section: Discussion (A) Novel Limb Electrode Placementsmentioning

confidence: 99%

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A Wearable Wireless ECG Monitoring System With Dynamic Transmission Power Control for Long-Term Homecare

et al. 2015

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This paper presents a wearable wireless ECG monitoring system based on novel 3-Lead electrode placements for long-term homecare. The experiment for novel 3-Lead electrode placements is carried out, and the results show that the distance between limb electrodes can be significantly reduced. Based on the new electrode position, a small size sensor node, which is powered by a rechargeable battery, is designed to detect, amplify, filter and transmit the ECG signals. The coordinator receives the data and sends it to PC. Finally the signals are displayed on the GUI. In order to control the power consumption of sensor node, a dynamic power adjustment method is applied to automatically adjust the transmission power of the sensor node according to the received signal strength indicator (RSSI), which is related to the distance and obstacle between sensor node and coordinator. The system is evaluated when the user, who wears the sensor, is walking and running. A promising performance is achieved even under body motion. The power consumption can be significantly reduced with this dynamic power adjustment method.

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Section: Discussion (A) Novel Limb Electrode Placementsmentioning

confidence: 99%

“…Compared to the design in [26][27][28], this system uses simplified circuit, but can still get the high quality signals and meanwhile make the size of the sensor compact. Unlike the design in [13], this design can monitor the ECG signals continuously.…”

Section: (B) Wireless Ecg Monitoring Systemmentioning

confidence: 99%

A Wearable Wireless ECG Monitoring System With Dynamic Transmission Power Control for Long-Term Homecare

et al. 2015

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“…[32][33][34][35]. Large number of studies report sensors developed to monitor body temperature [36], heart rate [37], electrocardiogram [38,39] and blood pressure [40], however, relatively less attention has been given to monitoring of chronic wounds. Farooqui et al [41] designed a smart bandage comprising of capacitive and resistive sensors for analyzing bleeding/ pressure levels and pH of fluids in wound respectively.…”

Section: Introductionmentioning

confidence: 99%

Electroanalytical Sensor for Diabetic Foot Ulcer Monitoring with Integrated Electronics for Connected Health Application

et al. 2020

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L‐tyrosine is an amino acid, the concentration of which is found to be highly elevated in patients suffering from diabetic foot ulcer (DFU). The latter proves to be fatal when it turns out chronic and may lead to amputation. The conventional clinical diagnostic methods are costly and time consuming, in which case, the condition of patient(s) may deteriorate long before proper treatment commences. Herein, we report the development of smart band‐aid for real time monitoring of L‐tyrosine by employing enzymatic bio‐sensor using α‐MnO2/tyrosinase. The smart band‐aid was further integrated with portable electronics capable of wireless data transmission to a personal digital assistant, and its tyrosine sensing performance was evaluated. Anodic current was found to vary linearly with the concentrations of L‐tyrosine in the range of 5 nM–500 μM. The developed sensor displayed a limit of detection and sensitivity of 0.71 nM and 0.67 μA/nM/mm2 respectively, with a stability of 25 days. The developed sensor was validated using a commercial impedance analyzer. The impedance response was found to be consistent with the cyclic voltammogram obtained and demonstrated to be a linear function of tyrosine concentration. The developed sensing platform combines early diagnosis with connected health technologies, thus, fitting well into modern healthcare needs.

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“…However, traditional monitoring methods are usually conducted in a short time window, which are likely to lose signals of transient events that may be of profound prognostic or therapeutic importance. To solve this problem, some wearable health monitoring devices (WHMDs) have been developed to monitor specific signals continuously and automatically [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Reflective oxygen saturation monitoring at hypothenar and its validation by human hypoxia experiment

Guo

Cao²,

Zhang³

et al. 2015

BioMed Eng OnLine

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BackgroundPulse oxygen saturation (SpO2) is an important parameter for healthcare, and wearable sensors and systems for SpO2 monitoring have become increasingly popular. The aim of this paper is to develop a novel SpO2 monitoring system, which detects photoplethysmographic (PPG) signals at hypothenar with a reflection-mode sensor embedded into a glove.MethodsA special photo-detector section was designed with two photodiodes arranged symmetrically to the red and infrared light-emitting diodes (LED) to enhance the signal quality. The reflective sensor was placed in a soft silicon substrate sewn in a glove to fit the surface of the hypothenar. To lower the power consumption, the LED driving current was reduced and energy-efficient electronic components were applied. The performance for PPG signal detection and SpO2 monitoring was evaluated by human hypoxia experiments. Accelerometer-based adaptive noise cancellation (ANC) methods applying the least mean squares (LMS) and recursive least squares (RLS) algorithms were studied to suppress motion artifact.ResultsA total of 20 subjects participated in the hypoxia experiment. The degree of comfort for wearing this system was accepted by them. The PPG signals were detected effectively at SpO2 levels from about 100–70%. The experiment validated the accuracy of the system was 2.34%, compared to the invasive measurements. Both the LMS and RLS algorithms improved the performance during motion. The total current consumed by the system was only 8 mA.ConclusionsIt is feasible to detect PPG signal and monitor SpO2 at the location of hypothenar. This novel system can achieve reliable SpO2 measurements at different SpO2 levels and on different individuals. The system is light-weighted, easy to wear and power-saving. It has the potential to be a solution for wearable monitoring, although more work should be conducted to improve the motion-resistant performance significantly.

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A Wearable Cardiac Monitor for Long-Term Data Acquisition and Analysis

Cited by 51 publications

References 8 publications

A Wearable Wireless ECG Monitoring System With Dynamic Transmission Power Control for Long-Term Homecare

A Wearable Wireless ECG Monitoring System With Dynamic Transmission Power Control for Long-Term Homecare

Electroanalytical Sensor for Diabetic Foot Ulcer Monitoring with Integrated Electronics for Connected Health Application

Reflective oxygen saturation monitoring at hypothenar and its validation by human hypoxia experiment

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