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Total 332 results found since Jan 2013.

Sensors, Vol. 20, Pages 1034: Investigation of an Ultra Wideband Noise Sensor for Health Monitoring
as Fhager Quick on-scene assessment and early intervention is the key to reduce the mortality of stroke and trauma patients, and it is highly desirable to develop ambulance-based diagnostic and monitoring devices in order to provide additional support to the medical personnel. We developed a compact and low cost ultra wideband noise sensor for medical diagnostics and vital sign monitoring in pre-hospital settings. In this work, we demonstrated the functionality of the sensor for respiration and heartbeat monitoring. In the test, metronome was used to manipulate the breathing pattern and the heartbeat rate reference was...
Source: Sensors - February 13, 2020 Category: Biotechnology Authors: Xuezhi Zeng Joakim Robakowski Mikael Persson Albert Monteith Andreas Fhager Tags: Article Source Type: research

Sensors, Vol. 20, Pages 840: Experimental Validation of Microwave Tomography with the DBIM-TwIST Algorithm for Brain Stroke Detection and Classification
We present an initial experimental validation of a microwave tomography (MWT) prototypefor brain stroke detection and classification using the distorted Born iterative method, two-stepiterative shrinkage thresholding (DBIM-TwIST) algorithm. The validation study consists of firstpreparing and characterizing gel phantoms which mimic the structure and the dielectric propertiesof a simplified brain model with a haemorrhagic or ischemic stroke target. Then, we measure theS-parameters of the phantoms in our experimental prototype and process the scattered signals from 0.5to 2.5 GHz using the DBIM-TwIST algorithm to estimate the ...
Source: Sensors - February 3, 2020 Category: Biotechnology Authors: Karadima Rahman Sotiriou Ghavami Lu Ahsan Kosmas Tags: Article Source Type: research

Sensors, Vol. 20, Pages 765: Detection of Atrial Fibrillation Episodes in Long-Term Heart Rhythm Signals Using a Support Vector Machine
Jezewski Leski Atrial fibrillation (AF) is a serious heart arrhythmia leading to a significant increase of the risk for occurrence of ischemic stroke. Clinically, the AF episode is recognized in an electrocardiogram. However, detection of asymptomatic AF, which requires a long-term monitoring, is more efficient when based on irregularity of beat-to-beat intervals estimated by the heart rate (HR) features. Automated classification of heartbeats into AF and non-AF by means of the Lagrangian Support Vector Machine has been proposed. The classifier input vector consisted of sixteen features, including four coefficien...
Source: Sensors - January 29, 2020 Category: Biotechnology Authors: Czabanski Horoba Wrobel Matonia Martinek Kupka Jezewski Kahankova Jezewski Leski Tags: Article Source Type: research

Sensors, Vol. 20, Pages 542: A Pilot Study on the e-Kayak System: A Wireless DAQ Suited for Performance Analysis in Flatwater Sprint Kayaks
eppe Annino Nowadays, in modern elite sport, the identification of the best training strategies which are useful in obtaining improvements during competitions requires an accurate measure of the physiologic and biomechanical parameters that affect performance. The goal of this pilot study was to investigate the capabilities of the e-Kayak system, a multichannel digital acquisition system specifically tailored for flatwater sprint kayaking application. e-Kayak allows the synchronous measure of all the parameters involved in kayak propulsion, both dynamic (including forces acting on the paddle and footrest) and kinematic...
Source: Sensors - January 18, 2020 Category: Biotechnology Authors: Vincenzo Bonaiuto Giorgio Gatta Cristian Romagnoli Paolo Boatto Nunzio Lanotte Giuseppe Annino Tags: Article Source Type: research

Sensors, Vol. 20, Pages 88: Development of a Smartphone-Based Balance Assessment System for Subjects with Stroke
-Hsu Sung Stroke is a cerebral artery disease that negatively affects activities of daily living (ADLs) and quality of life (QoL). Smartphones have demonstrated strong potential in assessing balance performance. However, such smartphone-based tools have thus far not been applied to stroke survivors. The purpose of this study was to develop a smartphone-based balance assessment system for subjects who have experienced strokes and evaluate the system feasibility. The smartphone-based balance assessment application was developed with Android Studio, and reliability and validity tests were conducted. The smartphone was use...
Source: Sensors - December 21, 2019 Category: Biotechnology Authors: You-Ruei Hou Ya-Lan Chiu Shang-Lin Chiang Hui-Ya Chen Wen-Hsu Sung Tags: Article Source Type: research

Sensors, Vol. 20, Pages 37: Gait Asymmetry Post-Stroke: Determining Valid and Reliable Methods Using a Single Accelerometer Located on the Trunk
Sarah A. Moore Asymmetry is a cardinal symptom of gait post-stroke that is targeted during rehabilitation. Technological developments have allowed accelerometers to be a feasible tool to provide digital gait variables. Many acceleration-derived variables are proposed to measure gait asymmetry. Despite a need for accurate calculation, no consensus exists for what is the most valid and reliable variable. Using an instrumented walkway (GaitRite) as the reference standard, this study compared the validity and reliability of multiple acceleration-derived asymmetry variables. Twenty-five post-stroke participants performed r...
Source: Sensors - December 18, 2019 Category: Biotechnology Authors: Christopher Buckley M. Encarna Mic ó-Amigo Michael Dunne-Willows Alan Godfrey Aodh án Hickey Sue Lord Lynn Rochester Silvia Del Din Sarah A. Moore Tags: Article Source Type: research

Sensors, Vol. 19, Pages 5090: Design and Analyses of a Transdermal Drug Delivery Device (TD3) †
ico In this paper, we introduce a novel type of transdermal drug delivery device (TD3) with a micro-electro-mechanical system (MEMS) design using computer-aided design (CAD) techniques as well as computational fluid dynamics (CFD) simulations regarding the fluid interaction inside the device during the actuation process. For the actuation principles of the chamber and microvalve, both thermopneumatic and piezoelectric principles are employed respectively, originating that the design perfectly integrates those principles through two different components, such as a micropump with integrated microvalves and a microneedle ...
Source: Sensors - November 20, 2019 Category: Biotechnology Authors: Jennifer Garc ía Ismael R íos Faruk Fonthal Rico Tags: Article Source Type: research

Sensors, Vol. 19, Pages 4804: Feasibility of a Sensor-Based Gait Event Detection Algorithm for Triggering Functional Electrical Stimulation during Robot-Assisted Gait Training
fmann Technologies such as robot-assisted gait trainers or functional electrical stimulation can improve the rehabilitation process of people affected with gait disorders due to stroke or other neurological defects. By combining both technologies, the potential disadvantages of each technology could be compensated and simultaneously, therapy effects could be improved. Thus, an algorithm was designed that aims to detect the gait cycle of a robot-assisted gait trainer. Based on movement data recorded with inertial measurement units, gait events can be detected. These events can further be used to trigger functional elect...
Source: Sensors - November 4, 2019 Category: Biotechnology Authors: Andreas Schicketmueller Georg Rose Marc Hofmann Tags: Article Source Type: research

Sensors, Vol. 19, Pages 4708: Multiple Physiological Signals Fusion Techniques for Improving Heartbeat Detection: A Review
m Otero This paper presents a review of the techniques found in the literature that aim to achieve a robust heartbeat detection from fusing multi-modal physiological signals (e.g., electrocardiogram (ECG), blood pressure (BP), artificial blood pressure (ABP), stroke volume (SV), photoplethysmogram (PPG), electroencephalogram (EEG), electromyogram (EMG), and electrooculogram (EOG), among others). Techniques typically employ ECG, BP, and ABP, of which usage has been shown to obtain the best performance under challenging conditions. SV, PPG, EMG, EEG, and EOG signals can help increase performance when included within the ...
Source: Sensors - October 28, 2019 Category: Biotechnology Authors: Javier Tejedor Constantino A. Garc ía David G. M árquez Rafael Raya Abraham Otero Tags: Review Source Type: research

Sensors, Vol. 19, Pages 4681: Detection of Participation and Training Task Difficulty Applied to the Multi-Sensor Systems of Rehabilitation Robots
Yungui Li In the process of rehabilitation training for stroke patients, the rehabilitation effect is positively affected by how much physical activity the patients take part in. Most of the signals used to measure the patients’ participation are EMG signals or oxygen consumption, which increase the cost and the complexity of the robotic device. In this work, we design a multi-sensor system robot with torque and six-dimensional force sensors to gauge the patients’ participation in training. By establishing the static equation of the mechanical leg, the man–machine interaction...
Source: Sensors - October 27, 2019 Category: Biotechnology Authors: Hao Yan Hongbo Wang Luige Vladareanu Musong Lin Victor Vladareanu Yungui Li Tags: Article Source Type: research

Sensors, Vol. 19, Pages 4600: WaistonBelt X:A Belt-Type Wearable Device with Sensing and Intervention Toward Health Behavior Change
asumoto Changing behavior related to improper lifestyle habits has attracted attention as a solution to prevent lifestyle diseases, such as diabetes, heart disease, arteriosclerosis, and stroke. To drive health behavior changes, wearable devices are needed, and they must not only provide accurate sensing and visualization functions but also effective intervention functions. In this paper, we propose a health support system, WaistonBelt X, that consists of a belt-type wearable device with sensing and intervention functions and a smartphone application. WaistonBelt X can automatically measure a waistline with a magnetome...
Source: Sensors - October 21, 2019 Category: Biotechnology Authors: Yugo Nakamura Yuki Matsuda Yutaka Arakawa Keiichi Yasumoto Tags: Article Source Type: research

Sensors, Vol. 19, Pages 4587: Real-Time Correction and Stabilization of Laser Diode Wavelength in Miniature Homodyne Interferometer for Long-Stroke Micro/Nano Positioning Stage Metrology
hao Fan A low-cost miniature homodyne interferometer (MHI) with self-wavelength correction and self-wavelength stabilization is proposed for long-stroke micro/nano positioning stage metrology. In this interferometer, the displacement measurement is based on the analysis of homodyne interferometer fringe pattern. In order to miniaturize the interferometer size, a low-cost and small-sized laser diode is adopted as the laser source. The accuracy of the laser diode wavelength is real-time corrected by the proposed wavelength corrector using a modified wavelength calculation equation. The variation of the laser diode wavele...
Source: Sensors - October 21, 2019 Category: Biotechnology Authors: Yindi Cai Baokai Feng Qi Sang Kuang-Chao Fan Tags: Article Source Type: research

Sensors, Vol. 19, Pages 4600: WaistonBelt X: A Belt-Type Wearable Device with Sensing and Intervention Toward Health Behavior Change
asumoto Changing behavior related to improper lifestyle habits has attracted attention as a solution to prevent lifestyle diseases, such as diabetes, heart disease, arteriosclerosis, and stroke. To drive health behavior changes, wearable devices are needed, and they must not only provide accurate sensing and visualization functions but also effective intervention functions. In this paper, we propose a health support system, WaistonBelt X, that consists of a belt-type wearable device with sensing and intervention functions and a smartphone application. WaistonBelt X can automatically measure a waistline with a magnetome...
Source: Sensors - October 21, 2019 Category: Biotechnology Authors: Yugo Nakamura Yuki Matsuda Yutaka Arakawa Keiichi Yasumoto Tags: Article Source Type: research

Sensors, Vol. 19, Pages 4537: Augmenting Clinical Outcome Measures of Gait and Balance with a Single Inertial Sensor in Age-Ranged Healthy Adults
This study tested and validated the utility of a single IMU to quantify gait and balance features during routine clinical outcome tests, and evaluated changes in sensor-derived measurements with age, sex, height, and weight. Age-ranged, healthy individuals (N = 49, 20–70 years) wore a lower back IMU during the 10 m walk test (10MWT), Timed Up and Go (TUG), and Berg Balance Scale (BBS). Spatiotemporal gait parameters computed from the sensor data were validated against gold standard measures, demonstrating excellent agreement for stance time, step time, gait velocity, and step count (intraclass correlation (IC...
Source: Sensors - October 17, 2019 Category: Biotechnology Authors: O ’Brien Hidalgo-Araya Mummidisetty Vallery Ghaffari Rogers Lieber Jayaraman Tags: Article Source Type: research

Sensors, Vol. 19, Pages 4463: E-Textiles for Healthy Ageing
e Beeby The ageing population has grown quickly in the last half century with increased longevity and declining birth rate. This presents challenges to health services and the wider society. This review paper considers different aspects (e.g., physical, mental, and social well-being) of healthy ageing and how health devices can help people to monitor health conditions, treat diseases and promote social interactions. Existing technologies for addressing non-physical (e.g., Alzheimer’s, loneliness) and physical (e.g., stroke, bedsores, and fall) related challenges are presented together with the drivers and...
Source: Sensors - October 14, 2019 Category: Biotechnology Authors: Kai Yang Beckie Isaia Laura J.E. Brown Steve Beeby Tags: Review Source Type: research