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wireless continuous monitoring

Youn Ok Lee, Antonio A Morgan-Lopez, James M Nonnemaker, Jessica K Pepper, Edward C Hensel, Risa J Robinson
Introduction: Delivery of nicotine and substances from electronic nicotine delivery systems, or e-cigarettes, depends in-part on how users puff on the devices. Little is known about variation in puffing behavior to inform testing protocols or understand if puffing behaviors result in increased exposure to emissions. Methods: We analyzed puff topography data collected using a wireless portable use monitor (wPUMTM) continuously over 2 weeks among N = 34 current second generation ecigarette users in their everyday lives...
August 10, 2018: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
Yifan Zhou, Luis Alejandro Mur, Arwyn Edwards, John Davies, Jiwan Han, Huawei Qin, Ying Ye
Freshwater quality detection is important for pollution control. Three important components of water quality are pH, ammonia and dissolved H2 S and there is an urgent need for a high-precision sensor for simultaneous and continuous measurement. In this study, all-solid-state electrodes of Eh, pH, NH4 + and S2- were manufactured and mounted to a wireless chemical sensor with multiple parameters. Calibration indicated that the pH electrode had a Nernst response with slope of 53.174 mV; the NH4 + electrode had a detection limit of 10-5 mol/L (Nernst response slope of 53...
August 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Jennifer Lynn Wall, Paul R Marbán, David F Brinker, Jeffery D Sullivan, Mia Zimnik, Jennifer L Murrow, Peter C McGowan, Carl R Callahan, Diann J Prosser
Many waterbird populations have faced declines over the last century, including the common tern (Sterna hirundo), a waterbird species with a widespread breeding distribution, that has been recently listed as endangered in some habitats of its range. Waterbird monitoring programs exist to track populations through time; however, some of the more intensive approaches require entering colonies and can be disruptive to nesting populations. This paper describes a protocol that utilizes a minimally invasive surveillance system to continuously monitor common tern nesting behavior in typical ground-nesting colonies...
July 22, 2018: Journal of Visualized Experiments: JoVE
Sebastià Galmés, Soledad Escolar
A technology drift is currently taking place from traditional battery-powered sensor networks, which exhibit limited lifetime, to the new Energy-Harvesting Wireless Sensor Networks (EH-WSN), which open the way towards self-sustained operation. However, this emergent modality also brings up new challenges, especially due to the time-varying nature and unpredictability of ambient energy sources. Most proposals for implementing EH-WSN rely on heuristic approaches to redesign the duty-cycling mechanism at the MAC layer, with the ultimate goal of optimizing network performance while preserving self-sustained and continuous operation...
August 1, 2018: Sensors
Xiaofan Jiang, Tong Zhu, Tatsuhiro Kodama, Nithin Raghunathan, Alina Alexeenko, Dimitrios Peroulis
This work presents the design and evaluation of a fully wireless, multi-point temperature sensor system as a Process Analytical Technology (PAT) for lyophilization. Each sensor contains seven sensing elements which measure the product temperature at various positions of the contents of a glass vial. The sensor performance was studied by freeze drying experiments with sensor placement in both center and edge of full shelf of 6R glass vials with 4 ml fill volume. Product temperature profile and primary drying time measured at the bottom center position in the glass vial by the wireless sensor as well as the primary drying time are in close comparison with the thermocouple data...
2018: Frontiers in Chemistry
Azar Alizadeh, Andrew Burns, Ralf Lenigk, Rachel Gettings, Jeffrey Ashe, Adam Porter, Margaret McCaul, Ruairi Barrett, Dermot Diamond, Paddy White, Perry Skeath, Melanie Tomczak
Implementation of wearable sweat sensors for continuous measurement of fluid based biomarkers (including electrolytes, metabolites and proteins) is an attractive alternative to common, yet intrusive and invasive, practices such as urine or blood analysis. Recent years have witnessed several key demonstrations of sweat based electrochemical sensing in wearable formats, however, there are still significant challenges and opportunities in this space for clinical acceptance, and thus mass implementation of these devices...
July 31, 2018: Lab on a Chip
Pedro Figueiredo E Silva, Ville Kaseva, Elena Simona Lohan
Connectivity solutions for the Internet of Things (IoT) aim to support the needs imposed by several applications or use cases across multiple sectors, such as logistics, agriculture, asset management, or smart lighting. Each of these applications has its own challenges to solve, such as dealing with large or massive networks, low and ultra-low latency requirements, long battery life requirements (i.e., more than ten years operation on battery), continuously monitoring of the location of certain nodes, security, and authentication...
July 30, 2018: Sensors
Monica Makiko Dua, Anand Navalgund, Steve Axelrod, Lindsay Axelrod, Patrick J Worth, Jeffrey A Norton, George A Poultsides, George Triadafilopoulos, Brendan C Visser
INTRODUCTION: Post-operative delayed gastric emptying (DGE) is a frustrating complication of pancreaticoduodenectomy (PD). We studied whether monitoring of post-operative gastric motor activity using a novel wireless patch system can identify patients at risk for DGE. METHODS: Eighty-one patients were prospectively studied since 2016; 75 patients were analyzed for this study. After PD, battery-operated wireless patches (G-Tech Medical) that acquire gastrointestinal myoelectrical signals are placed on the abdomen and transmit data by Bluetooth...
July 26, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
Haoran Ren, Hailong Jin, Chen Chen, Hemant Ghayvat, Wei Chen
Heart sounds deliver vital physiological and pathological evidence about health. Wireless cardiac auscultation offers continuous cardiac monitoring of an individual without 24*7 manual healthcare care services. In this paper, a novel wireless sensing system to monitor and analyze cardiac condition is proposed, which sends the information to the caregiver as well as a medical practitioner with an application of the Internet of Things (IoT). An integrated system for heart sound acquisition, storage, and asynchronous analysis has been developed, from scratch to information uploading through IoT and signal analysis...
2018: IEEE Journal of Translational Engineering in Health and Medicine
Vladimir Risojević, Robert Rozman, Ratko Pilipović, Rok Češnovar, Patricio Bulić
Wireless sensor networks can provide a cheap and flexible infrastructure to support the measurement of noise pollution. However, the processing of the gathered data is challenging to implement on resource-constrained nodes, because each node has its own limited power supply, low-performance and low-power micro-controller unit and other limited processing resources, as well as limited amount of memory. We propose a sensor node for monitoring of indoor ambient noise. The sensor node is based on a hardware platform with limited computational resources and utilizes several simplifications to approximate more complex and costly signal processing stage...
July 19, 2018: Sensors
Matthias Längin, Alessandro Panelli, Bruno Reichart, Alexander Kind, Paolo Brenner, Tanja Mayr, Jan-Michael Abicht
BACKGROUND Perioperative monitoring and hemodynamic management after heterotopic thoracic cardiac xenotransplantation is challenging due to 2 independently beating hearts. Telemetry allows continuous monitoring of hemodynamic parameters of both the donor and recipient hearts. We describe our experience and report on the validity of a telemetric system during and after surgery. MATERIAL AND METHODS Wireless telemetry transmitters were implanted in 3 baboons receiving porcine donor hearts. Left ventricular pressure and ECG were assessed from the donor heart, whereas aortic pressure and temperature were assessed from the recipient...
July 20, 2018: Annals of Transplantation: Quarterly of the Polish Transplantation Society
Daniela De Venuto, Giovanni Mezzina
The waste in the perishable goods supply-chain has prompted many global organizations (e.g., FAO and WHO), to develop the Hazard Analysis and Critical Control Points (HACCP) protocol that ensures a high degree of food quality, minimizing the losses in all the stages of the farm-to-fork chain. It has been proven that good warehouse management practices improve the average life of perishable goods. The advances in wireless sensors network (WSN) technology offers the possibility of a "smart" storage organization...
July 2, 2018: Sensors
Shitanshu Kusmakar, Chandan Karmakar, Bernard Yan, Terence Obrien, Ramanathan Muthuganapathy, Marimuthu Palaniswami
Epileptic seizure detection requires specialized approaches such as video/electroencephalography monitoring. However, these approaches are restricted mainly to hospital setting and requires video/EEG analysis by experts, which makes these approaches resource- and labor-intensive. In contrast, we aim to develop a wireless remote monitoring system based on a single wrist-worn accelerometer device, which is sensitive to multiple types of convulsive seizures and is capable of detecting seizures with short duration...
June 11, 2018: IEEE Transactions on Bio-medical Engineering
Shitanshu Kusmakar, Chandan Karmakar, Bernard Yan, Terence Obrien, Ramanathan Muthuganapathy, Marimuthu Palaniswami
Epileptic seizure detection requires specialized approaches such as video/electroencephalography monitoring. However, these approaches are restricted mainly to hospital setting and requires video/EEG analysis by experts, which makes these approaches resource- and labor-intensive. In contrast, we aim to develop a wireless, remote monitoring system using a single wrist-worn accelerometer sensor, which is sensitive to multiple types of convulsive seizures and is capable of detecting seizures with short duration...
June 11, 2018: IEEE Transactions on Bio-medical Engineering
C L Downey, J Croft, H Buckley, R Randell, J M Brown, D G Jayne
Background: Despite medical advances, major surgery remains high risk. Up to 44% of patients experience postoperative complications, which can have huge impacts for patients and the healthcare system. Early recognition of postoperative complications is crucial in reducing morbidity and preventing long-term disability. The current standard of care is intermittent manual vital signs monitoring, but new wearable remote monitors offer the benefits of continuous vital signs monitoring without limiting the patient's mobility...
2018: Pilot and Feasibility Studies
Saraí M Torres Delgado, Jan G Korvink, Dario Mager
In this paper we present a comprehensive description of the design, fabrication and operation of an electrified Lab-on-a-Disc (eLoaD) system. The smart platform is developed to extend conventional Lab-on-a-Disc applications with an electronic interface, providing additional flow control and sensing capabilities to centrifugal microfluidics platforms. Wireless power is transferred from a Qi-compliant transmitter to the eLoaD platform during rotation. An Arduino-based microcontroller, a Bluetooth communication module, and an on-board SD-card are integrated into the platform...
June 5, 2018: Biosensors & Bioelectronics
Hyosang Yoon, Xing Xuan, Sungkwan Jeong, Jae Y Park
Electroplating of nanoporous Pt (nPt) induces an extremely strong tensile stress, which results in the exfoliation of nPt on flexible polymer substrate despite plasma treatment to improve adhesion. Here, we overcame this challenge by modifying flexible stainless-steel, and developed wearable, robust, flexible, and non-enzymatic continuous glucose monitoring system. The flexible stainless-steel was highly effective in improving the adhesion between the metal layer and substrate. The developed wireless system included electrochemical analysis circuits, a microcontroller unit, and a wireless communication module...
October 15, 2018: Biosensors & Bioelectronics
Jesus Rodriguez-Manzano, Po Ying Chia, Tsin Wen Yeo, Alison Holmes, Pantelis Georgiou, Sophie Yacoub
PURPOSE OF REVIEW: Dengue continues to be a major global public health threat. Symptomatic infections can cause a spectrum of disease ranging from a mild febrile illness to severe and potentially life-threatening manifestations. Management relies on supportive treatment with careful fluid replacement. The purpose of this review is to define the unmet needs and challenges in current dengue diagnostics and patient monitoring and outline potential novel technologies to address these needs...
June 7, 2018: Current Infectious Disease Reports
Xueyuan Zhao, Vidyasagar Sadhu, Tuan Le, Dario Pompili, Mehdi Javanmard
Wireless all-analog biosensor design for the concurrent microfluidic and physiological signal monitoring is presented in this paper. The key component is an all-analog circuit capable of compressing two analog sources into one analog signal by the analog joint source-channel coding (AJSCC). Two circuit designs are discussed, including the stacked-voltage-controlled voltage source (VCVS) design with the fixed number of levels, and an improved design, which supports a flexible number of AJSCC levels. Experimental results are presented on the wireless biosensor prototype, composed of printed circuit board realizations of the stacked-VCVS design...
June 2018: IEEE Transactions on Biomedical Circuits and Systems
Xing Chen, Babak Assadsangabi, York Hsiang, Kenichi Takahata
Despite the multitude of stents implanted annually worldwide, the most common complication called in-stent restenosis still poses a significant risk to patients. Here, a "smart" stent equipped with microscale sensors and wireless interface is developed to enable continuous monitoring of restenosis through the implanted stent. This electrically active stent functions as a radiofrequency wireless pressure transducer to track local hemodynamic changes upon a renarrowing condition. The smart stent is devised and constructed to fulfill both engineering and clinical requirements while proving its compatibility with the standard angioplasty procedure...
May 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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