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Healthcare Technology Letters

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https://www.readbyqxmd.com/read/28008367/characterisation-of-rollator-use-using-inertial-sensors
#1
Tsu-Jui Cheng, Laurence Kenney, James David Amor, Sibylle Brunhilde Thies, Eleonora Costamagna, Christopher James, Catherine Holloway
The use of walking aids is prevalent among older people and people with mobility impairment. Rollators are designed to support outdoor mobility and require the user to negotiate curbs and slopes in the urban environment. Despite the prevalence of rollators, analysis of their use outside of controlled environments has received relatively little attention. This Letter reports on an initial study to characterise rollator movement. An inertial measurement unit (IMU) was used to measure the motion of the rollator and analytical approaches were developed to extract features characterising the rollator movement, properties of the surface and push events...
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28008366/pervasive-assistive-technology-for-people-with-dementia-a-ucd-case
#2
Julia Rosemary Thorpe, Kristoffer V H Rønn-Andersen, Paulina Bień, Ali Gürcan Özkil, Birgitte Hysse Forchhammer, Anja M Maier
Smart mobile and wearable technology offers exciting opportunities to support people with dementia (PwD). Its ubiquity and popularity could even benefit user adoption - a great challenge for assistive technology (AT) for PwD that calls for user-centred design (UCD) methods. This study describes a user-centred approach to developing and testing AT based on off-the-shelf pervasive technologies. A prototype is created by combining a smartphone, smartwatch and various applications to offer six support features...
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28008365/development-of-a-prototype-of-portable-fes-rehabilitation-system-for-relearning-of-gait-for-hemiplegic-subjects
#3
Takashi Watanabe, Shun Endo, Ryusei Morita
This study aimed at developing a prototype of portable FES rehabilitation system for relearning gait pattern of healthy subjects, which can measure gait information during walking applying electrical stimulation for foot drop correction or providing timing information. A gait event detection method using an inertial sensor attached on the foot was determined based on gait of healthy subjects from simultaneous measurements with pressure sensors. From the result of comparing the detected gait event timings with EMG signal of the tibialis anterior muscle during walking of healthy subjects, the toe off and the foot flat timings detected by the inertial sensor were suggested to be useful to determine the stimulation timing for the foot drop correction...
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28008364/interfacial-pressure-and-shear-sensor-system-for-fingertip-contact-applications
#4
Maria Valero, Nick Hale, Jing Tang, Liudi Jiang, Mike McGrath, Jianliang Gao, Piotr Laszczak, David Moser
This Letter presents a capacitive-based sensor system for fingertip contact applications. It is capable of simultaneously measuring normal (pressure) and tangential (shear) stresses at the interface between a fingertip and external objects. This could be potentially exploitable for applications in the fields of upper limb prosthetics, robotics, hand rehabilitation and so on. The system was calibrated and its performance was tested using a test machine. To do so, specific test protocols reproducing typical stress profiles in fingertip contact interactions were designed...
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28008363/muscular-activity-and-physical-interaction-forces-during-lower-limb-exoskeleton-use
#5
Matthew Wilcox, Ashish Rathore, Dafne Zuleima Morgado Ramirez, Rui C V Loureiro, Tom Carlson
Spinal cord injury (SCI) typically manifests with a loss of sensorimotor control of the lower limbs. In order to overcome some of the disadvantages of chronic wheelchair use by such patients, robotic exoskeletons are an emerging technology that has the potential to transform the lives of patients. However, there are a number of points of contact between the robot and the user, which lead to interaction forces. In a recent study, the authors have shown that peak interaction forces are particularly prominent at the anterior aspect of the right leg...
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28008362/sensewheel-an-adjunct-to-wheelchair-skills-training
#6
Andrew Symonds, Stephen J G Taylor, Catherine Holloway
The purpose of this Letter was to investigate the influence of real-time verbal feedback to optimise push arc during over ground manual wheelchair propulsion. Ten healthy non-wheelchair users pushed a manual wheelchair for a distance of 25 m on level paving, initially with no feedback and then with real-time verbal feedback aimed at controlling push arc within a range of 85°-100°. The real-time feedback was provided by a physiotherapist walking behind the wheelchair, viewing real-time data on a tablet personal computer received from the Sensewheel, a lightweight instrumented wheelchair wheel...
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28008361/fuzzy-logic-based-risk-of-fall-estimation-using-smartwatch-data-as-a-means-to-form-an-assistive-feedback-mechanism-in-everyday-living-activities
#7
Dimitrios E Iakovakis, Fotini A Papadopoulou, Leontios J Hadjileontiadis
This Letter aims to create a fuzzy logic-based assistive prevention tool for falls, based on accessible sensory technology, such as smartwatch, resulting in monitoring of the risk factors of falls caused by orthostatic hypotension (OH); a drop in systolic blood pressure (DSBP) >20 mmHg due to postural changes. Epidemiological studies have shown that OH is a high risk factor for falls and has a strong impact in quality of life (QoL) of the elderly's, especially for some cases such as Parkinsonians. Based on smartwatch data, it is explored here how statistical features of heart rate variability (HRV) can lead to DSBP prediction and estimation of the risk of fall...
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28008360/disrupting-the-world-of-disability-the-next-generation-of-assistive-technologies-and-rehabilitation-practices
#8
Catherine Holloway, Helen Dawes
Designing, developing and deploying assistive technologies at a scale and cost which makes them accessible to people is challenging. Traditional models of manufacturing would appear to be insufficient at helping the world's 1 billion disabled people in accessing the technologies they require. In addition, many who receive assistive technologies simply abandon them as they do not meet their needs. In this study the authors explore the changing world of design for disability. A landscape which includes the rise of the maker movement, the role of ubiquitous sensing and the changing role of the 'user' to one of designer and maker...
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28008359/editorial-this-is-a-very-dynamic-and-exciting-time-for-assistive-technologies-and-for-tracking-rehabilitation-practices
#9
EDITORIAL
Catherine S Holloway
No abstract text is available yet for this article.
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733934/model-assessing-thermal-changes-during-high-temperature-root-canal-irrigation
#10
Analise Bartolo, Edmond Koyess, Josette Camilleri, Christopher Micallef
The main aim of root canal irrigation is to eliminate micro-organisms. Sodium hypochlorite (NaOCl) is considered to be the ideal material and raising its temperature potentiates the antimicrobial activity. NaOCl may lead to localised tissue necrosis when extruded past the root apex. This study analyses the use of high temperature root canal irrigation as an alternative process for the elimination of microorganisms from the root canal system. An experimental set-up was designed where a constant supply of heat was passed from a heat source through a copper wire inside the root canal...
September 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733933/efficient-and-robust-ventricular-tachycardia-and-fibrillation-detection-method-for-wearable-cardiac-health-monitoring-devices
#11
Eedara Prabhakararao, M Sabarimalai Manikandan
In this Letter, the authors propose an efficient and robust method for automatically determining the VT and VF events in the electrocardiogram (ECG) signal. The proposed method consists of: (i) discrete cosine transform (DCT)-based noise suppression; (ii) addition of bipolar sequence of amplitudes with alternating polarity; (iii) zero-crossing rate (ZCR) estimation-based VTVF detection; and (iv) peak-to-peak interval (PPI) feature based VT/VF discrimination. The proposed method is evaluated using 18,000 episodes of different ECG arrhythmias taken from 6 PhysioNet databases...
September 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733932/characterisation-of-the-complexity-of-intracranial-pressure-signals-measured-from-idiopathic-and-secondary-normal-pressure-hydrocephalus-patients
#12
Tricia Adjei, Daniel Abásolo, David Santamarta
Hydrocephalus is a condition characterised by enlarged cerebral ventricles, which in turn affects intracranial pressure (ICP); however, the mechanisms regulating ICP are not fully understood. A nonlinear signal processing approach was applied to ICP signals measured during infusion studies from patients with two forms of hydrocephalus, in a bid to compare the differences. This is the first study of its kind. The two forms of hydrocephalus were idiopathic normal pressure hydrocephalus (iNPH) and secondary normal pressure hydrocephalus (SH)...
September 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733931/performance-of-human-body-communication-based-wearable-ecg-with-capacitive-coupling-electrodes
#13
Jun Sakuma, Daisuke Anzai, Jianqing Wang
Wearable electrocardiogram (ECG) is attracting much attention in daily healthcare applications, and human body communication (HBC) technology provides an evident advantage in making the sensing electrodes of ECG also working for transmission through the human body. In view of actual usage in daily life, however, non-contact electrodes to the human body are desirable. In this Letter, the authors discussed the ECG circuit structure in the HBC-based wearable ECG for removing the common mode noise when employing non-contact capacitive coupling electrodes...
September 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733930/microwave-bone-imaging-a-preliminary-scanning-system-for-proof-of-concept
#14
Giuseppe Ruvio, Antonio Cuccaro, Raffaele Solimene, Adriana Brancaccio, Bruno Basile, Max J Ammann
This Letter introduces a feasibility study of a scanning system for applications in biomedical bone imaging operating in the microwave range 0.5-4 GHz. Mechanical uncertainties and data acquisition time are minimised by using a fully automated scanner that controls two antipodal Vivaldi antennas. Accurate antenna positioning and synchronisation with data acquisition enables a rigorous proof-of-concept for the microwave imaging procedure of a multi-layer phantom including skin, fat, muscle and bone tissues. The presence of a suitable coupling medium enables antenna miniaturisation and mitigates the impedance mismatch between antennas and phantom...
September 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733929/cardiac-ultrasonography-over-4g-wireless-networks-using-a-tele-operated-robot
#15
Sotiris Avgousti, Andreas S Panayides, Antonis P Jossif, Eftychios G Christoforou, Pierre Vieyres, Cyril Novales, Sotos Voskarides, Constantinos S Pattichis
This Letter proposes an end-to-end mobile tele-echography platform using a portable robot for remote cardiac ultrasonography. Performance evaluation investigates the capacity of long-term evolution (LTE) wireless networks to facilitate responsive robot tele-manipulation and real-time ultrasound video streaming that qualifies for clinical practice. Within this context, a thorough video coding standards comparison for cardiac ultrasound applications is performed, using a data set of ten ultrasound videos. Both objective and subjective (clinical) video quality assessment demonstrate that H...
September 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733928/health-and-rescue-services-management-system-during-a-crisis-event
#16
Efthyvoulos Kyriacou, Iolie Nicolaidou, George Hadjichristofi, Stelios Kyprianou, Synesios Christou, Riana Constantinou
Τhe performance of rescuers and personnel handling major emergencies or crisis events can be significantly improved through continuous training and through technology support. The work done in order to create a system has been discussed which can support both resources and victims during a crisis or major emergency event. More specifically, the system supports real-time management of firefighter teams, rescue teams, health services, and victims during a major disaster. It can be deployed in an ad hoc manner in the disaster area, as a stand-alone infrastructure (using its own telecommunications and power)...
September 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733927/integrated-modelling-of-medical-emergency-response-process-for-improved-coordination-and-decision-support
#17
George Milis, Panayiotis Kolios, Gaby Van Melick, Toni Staykova, Ira Helsloot, Georgios Ellinas, Christos Panayiotou, Marios Polycarpou
The medical emergency response comprises a domain with complex processes, encompassing multiple heterogeneous entities, from organisations involved in the response to human actors to key information sources. Due to the heterogeneity of the entities and the complexity of the domain, it is important to fully understand the individual processes in which the components are involved and their inter-operations, before attempting to design any technological tool for coordination and decision support. This work starts with the gluing together and visualisation of the interactions of involved entities into a conceptual model, along the identified five workspaces of emergency response...
September 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733926/wearable-multimodal-vitals-acquisition-unit-for-intelligent-field-triage
#18
Christoph Beck, Julius Georgiou
In this Letter, the authors describe the characterisation design and development of the authors' wearable, multimodal vitals acquisition unit for intelligent field triage. The unit is able to record the standard electrocardiogram, blood oxygen and body temperature parameters and also has the unique capability to record up to eight custom designed acoustic streams for heart and lung sound auscultation. These acquisition channels are highly synchronised to fully maintain the time correlation of the signals. The unit is a key component enabling systematic and intelligent field triage to continuously acquire vital patient information...
September 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733925/code-generator-for-implementing-dual-tree-complex-wavelet-transform-on-reconfigurable-architectures-for-mobile-applications
#19
Ferhat Canbay, Vecdi Emre Levent, Gorkem Serbes, H Fatih Ugurdag, Sezer Goren, Nizamettin Aydin
The authors aimed to develop an application for producing different architectures to implement dual tree complex wavelet transform (DTCWT) having near shift-invariance property. To obtain a low-cost and portable solution for implementing the DTCWT in multi-channel real-time applications, various embedded-system approaches are realised. For comparison, the DTCWT was implemented in C language on a personal computer and on a PIC microcontroller. However, in the former approach portability and in the latter desired speed performance properties cannot be achieved...
September 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27733924/design-of-cryptographically-secure-aes-like-s-box-using-second-order-reversible-cellular-automata-for-wireless-body-area-network-applications
#20
Bhoopal Rao Gangadari, Shaik Rafi Ahamed
In biomedical, data security is the most expensive resource for wireless body area network applications. Cryptographic algorithms are used in order to protect the information against unauthorised access. Advanced encryption standard (AES) cryptographic algorithm plays a vital role in telemedicine applications. The authors propose a novel approach for design of substitution bytes (S-Box) using second-order reversible one-dimensional cellular automata (RCA(2)) as a replacement to the classical look-up-table (LUT) based S-Box used in AES algorithm...
September 2016: Healthcare Technology Letters
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