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wireless continuous monitoring

Candice Downey, Rebecca Randell, Julia Brown, David G Jayne
BACKGROUND: Vital signs monitoring is a universal tool for the detection of postoperative complications; however, unwell patients can be missed between traditional observation rounds. New remote monitoring technologies promise to convey the benefits of continuous monitoring to patients in general wards. OBJECTIVE: The aim of this pilot study was to evaluate whether continuous remote vital signs monitoring is a practical and acceptable way of monitoring surgical patients and to optimize the delivery of a definitive trial...
December 11, 2018: Journal of Medical Internet Research
Changwon Wang, Young Kim, Se Dong Min
Spatiotemporal analysis of gait pattern is meaningful in diagnosing and prognosing foot and lower extremity musculoskeletal pathologies. Wearable smart sensors enable continuous real-time monitoring of gait, during daily life, without visiting clinics and the use of costly equipment. The purpose of this study was to develop a light-weight, durable, wireless, soft-material-based smart insole (SMSI) and examine its range of feasibility for real-time gait pattern analysis. A total of fifteen healthy adults (male: 10, female: 5, age 25...
November 30, 2018: Materials
M Brložnik, Š Likar, A Krvavica, V Avbelj, A Domanjko Petrič
OBJECTIVES: To evaluate the diagnostic utility of electrocardiogram data obtained by a wireless sensor from 36 dogs and four cats with suspected arrhythmias caused by cardiac or systemic diseases. MATERIALS AND METHODS: Wireless electrocardiographic recordings were obtained via two precordial electrodes attached to an electrocardiogram sensor connected to a smart device via low-power Bluetooth technology. Cardiac rate, rhythm and duration of P-QRS-T waves were evaluated with VisECG® software...
November 25, 2018: Journal of Small Animal Practice
Niloy Chandra Sarker, Faithe Keomanivong, Md Borhan, Shafiqur Rahman, Kendall Swanson
Background: Enteric methane (CH4 ) accounts for about 70% of total CH4 emissions from the ruminant animals. Researchers are exploring ways to mitigate enteric CH4 emissions from ruminants. Recently, nano zinc oxide (nZnO) has shown potential in reducing CH4 and hydrogen sulfide (H2 S) production from the liquid manure under anaerobic storage conditions. Four different levels of nZnO and two types of feed were mixed with rumen fluid to investigate the efficacy of nZnO in mitigating gaseous production...
2018: Journal of Animal Science and Technology
D C Zarpellon, P Runnacles, C Maucoski, U Coelho, F A Rueggeberg, Cag Arrais
OBJECTIVE: The objective of this study was to evaluate the in vivo effectiveness of air spray to reduce pulp temperature rise during exposure of intact premolars to light emitted by a high-power LED light-curing unit (LCU). METHODS AND MATERIALS: After local Ethics Committee approval (#255945), intact, upper first premolars requiring extraction for orthodontic reasons from five volunteers received infiltrative and intraligamental anesthesia. The teeth (n=9) were isolated using rubber dam, and a minute pulp exposure was attained...
November 16, 2018: Operative Dentistry
Claudine Gehin, Etienne Grenier, Cyril Chaigneau, Bertrand Massot, Arthur Claude, Amalric Montalibet, Eric McAdams
The continuous monitoring of edema in the lower limbs of the human body is presently not possible as suitable devices are not available. This paper presents the characterization and the testing of a novel ambulatory device dedicated to the monitoring of circumference variations in the lower limb. The sensor, based on an inductive loop integrated into a textile band, is connected to a miniaturized electronic system which wirelessly sends the calculated perimeter value of the leg to a smart mobile device. In-vitro tests have demonstrated that the device enables the measurement of perimeters ranging from 25 cm to 33 cm with an accuracy of 0...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Pablo Aqueveque, Rodrigo Osorio, Francisco Pastene, Francisco Saavedra, Esteban Pino
Diabetic foot is a pathology associated with diabetic neuropathy, where the vast majority of diabetic foot infections terminate in surgical intervention; from debridement to amputation of the involved limb. Commonly, diabetic foot infections come from ulceration produced by high-pressure areas under the foot. For this reason, researchers have been working on a continuous measurement system to detect the high-pressure areas in-shoe in a low cost way. This paper presents the design and implementation of a continuous monitoring device to measure the pressure in-shoe...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Christopher L Felton, Barry K Gilbert, Clifton R Haider
Continuous remote physiologic and environmental monitoring, employing an ever-increasing array of sensors, is now commonplace. Given the significant amount of data being digitized, two common sources of energy consumption can be targeted to improve device runtime: data storage and data transmission. One embedded method to maximize device runtime is inline low energy data compression. Herein we present a low complexity data encoding scheme. We list and characterize the parameters necessary for encoding. The encoding method is then evaluated and tuned using contrived data with varying degrees of covariance, as well as open-source electrocardiography (ECG) data...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Nandakumar Selvaraj, Gabriel Nallathambi, Rod Moghadam, Arshan Aga
Continuous remote monitoring with convenient wireless sensors is attractive for early detection of patient deterioration, preventing adverse events and leading to better patient care. This article presents an innovative sensor design of VitalPatch, a fully disposable wireless biosensor, for remote continuous monitoring, and details the performance assessments from bench testing and laboratory validation in 57 subjects. The bench testing results reveal that VitalPatch's QRS detection had a positive predictive value of $> 99$% from testing with ECG databases...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Jonathan Birjiniuk, Ankit J Gordhandas, George C Verghese, Thomas Heldt
Large volumes of physiological data can now be routinely collected using wearable devices, though a key challenge that remains is the conversion of raw data into clinically relevant and actionable information. While power constraints prevent continuous wireless streaming of large amounts of raw data for offline processing, on-board microprocessors have become sufficiently powerful for data reduction to be performed in real time on the wearable device itself, so that only aggregate, clinically interpretable measures need to be transmitted wirelessly...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Yushuang Ma, Long Zhao, Rongjin Yang, Xiuhong Li, Qiao Song, Zhenwei Song, Yi Zhang
At present, as growing importance continues to be attached to atmospheric environmental problems, the demand for real-time monitoring of these problems is constantly increasing. This article describes the development and application of an embedded system for monitoring of atmospheric pollutant concentrations based on LoRa (Long Range) wireless communication technology, which is widely used in the Internet of Things (IoT). The proposed system is realized using a combination of software and hardware and is designed using the concept of modularization...
November 12, 2018: Sensors
Pei Shi, Guanghui Li, Yongming Yuan, Liang Kuang
For monitoring the aquaculture parameters in pond with wireless sensor networks (WSN), high accuracy of fault detection and high precision of error correction are essential. However, collecting accurate data from WSN to server or cloud is a bottleneck because of the data faults of WSN, especially in aquaculture applications, limits their further development. When the data fault occurs, data fusion mechanism can help to obtain corrected data to replace abnormal one. In this paper, we propose a data fusion method using a novel function that is Dynamic Time Warping time series strategy improved support degree (DTWS-ISD) for enhancing data quality, which employs a Dynamic Time Warping (DTW) time series segmentation strategy to the improved support degree (ISD) function...
November 9, 2018: Sensors
Siddharth R Krishnan, Tyler R Ray, Amit B Ayer, Yinji Ma, Philipp Gutruf, KunHyuck Lee, Jong Yoon Lee, Chen Wei, Xue Feng, Barry Ng, Zachary A Abecassis, Nikhil Murthy, Izabela Stankiewicz, Juliet Freudman, Julia Stillman, Natalie Kim, Grace Young, Camille Goudeseune, John Ciraldo, Matthew Tate, Yonggang Huang, Matthew Potts, John A Rogers
Hydrocephalus is a common and costly neurological condition caused by the overproduction and/or impaired resorption of cerebrospinal fluid (CSF). The current standard of care, ventricular catheters (shunts), is prone to failure, which can result in nonspecific symptoms such as headaches, dizziness, and nausea. Current diagnostic tools for shunt failure such as computed tomography (CT), magnetic resonance imaging (MRI), radionuclide shunt patency studies (RSPSs), and ice pack-mediated thermodilution have disadvantages including high cost, poor accuracy, inconvenience, and safety concerns...
October 31, 2018: Science Translational Medicine
Siddharth R Krishnan, Chun-Ju Su, Zhaoqian Xie, Manish Patel, Surabhi R Madhvapathy, Yeshou Xu, Juliet Freudman, Barry Ng, Seung Yun Heo, Heling Wang, Tyler R Ray, John Leshock, Izabela Stankiewicz, Xue Feng, Yonggang Huang, Philipp Gutruf, John A Rogers
Precise, quantitative measurements of the thermal properties of human skin can yield insights into thermoregulatory function, hydration, blood perfusion, wound healing, and other parameters of clinical interest. The need for wired power supply systems and data communication hardware limits, however, practical applicability of existing devices designed for measurements of this type. Here, a set of advanced materials, mechanics designs, integration schemes, and wireless circuits is reported as the basis for wireless, battery-free sensors that softly interface to the skin to enable precise measurements of its temperature and thermal transport properties...
October 7, 2018: Small
Jayoung Kim, Juliane R Sempionatto, Somayeh Imani, Martin C Hartel, Abbas Barfidokht, Guangda Tang, Alan S Campbell, Patrick P Mercier, Joseph Wang
The development of wearable biosensors for continuous noninvasive monitoring of target biomarkers is limited to assays of a single sampled biofluid. An example of simultaneous noninvasive sampling and analysis of two different biofluids using a single wearable epidermal platform is demonstrated here. The concept is successfully realized through sweat stimulation (via transdermal pilocarpine delivery) at an anode, alongside extraction of interstitial fluid (ISF) at a cathode. The system thus allows on-demand, controlled sampling of the two epidermal biofluids at the same time, at two physically separate locations (on the same flexible platform) containing different electrochemical biosensors for monitoring the corresponding biomarkers...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Christos Goumopoulos
This paper describes the design and calibration of a highly accurate temperature measurement system for pervasive computing applications. A negative temperature coefficient (NTC) thermistor with high resistance tolerance is interfaced through a conditioning circuit to a 12-bit digital converter of a wireless microcontroller. The system is calibrated to minimize the effect of component uncertainties and achieves an accuracy of ±0.03 °C on average (±0.05 °C in worst cases) in a 5 °C to 45 °C range. The calibration process is based on a continuous temperature sweep, while calibration data are simultaneously logged to reduce the delays and cost of conventional calibration approaches...
October 13, 2018: Sensors
Pedro J Chacon, Limeng Pu, Tallis H da Costa, Young-Ho Shin, Taher Ghomian, Hamed Shamkhalichenar, Hsiao-Chun Wu, Brian A Irving, Jin-Woo Choi
Advances in several engineering fields have led to a trend towards miniaturization and portability of wearable biosensing devices, which used to be confined to large tools and clinical settings. Various systems to continuously measure electrophysiological activity through electrical and optical methods are one category of such devices. Being wearable and intended for prolonged use, the amount of noise introduced on sensors by movement remains a challenge and requires further optimization. User movement causes motion artifacts that alter the overall quality of the signals obtained, hence corrupting the resulting measurements...
October 9, 2018: IEEE Transactions on Bio-medical Engineering
Joakim Glasin, Joakim Henricson, Lars-Göran Lindberg, Daniel Wilhelms
Vital sign assessment is a common task in emergency medicine, but resources for continuous monitoring are restricted, data is often recorded manually, and entangled wires cause frustration. Therefore, we designed a small, wireless photoplethysmographic device capable of continuously assessing pulse, respiratory frequency and oxygen saturation on the sternum and tested the performance and feasibility in an emergency department setting. Fifty (56.3 ± 20.2 years), consenting emergency patients (29 male) were recruited...
October 10, 2018: Journal of Biophotonics
Edward J Bellfield, Lisa K Sharp, Yinglin Xia, Ben S Gerber
BACKGROUND: Cloud-based glucose monitoring programs allow users with diabetes to wirelessly synchronize their glucometers to their mobile phones. They also provide visualization and remote access of their data through its mobile app. There have been very few studies evaluating their effectiveness in managing diabetes among adolescents with type 1 diabetes (T1D). OBJECTIVE: The purpose of this study was to assess the feasibility of using a mobile app to improve daily average blood glucose (BG) levels and increase BG monitoring frequency...
February 7, 2018: JMIR diabetes
MuhibUr Rahman, Mahdi NaghshvarianJahromi, Seyed Sajad Mirjavadi, Abdel Magid Hamouda
This paper presents a novel resonator that can switch and create three important behaviors within the same antenna using miniaturized capacitors. The resonator was integrated into conventional Ultra-Wide Band (UWB) antenna to achieve UWB and Single/Dual continuously tunable-notch behaviors. The Single/Dual notched was continuously tuned to our desired frequency band by changing the value of the capacitors. The antenna designed and fabricated to validate these behaviors had a compact size of 24 × 30.5 mm², including the ground plane...
October 4, 2018: Sensors
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