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Journal of Medical Engineering & Technology

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https://www.readbyqxmd.com/read/28730864/automatic-rbg-depth-pressure-anthropometric-analysis-and-individualised-sleep-solution-prescription
#1
Jordi Esquirol Caussa, Cristina Palmero Cantariño, Vanessa Bayo Tallón, Miquel Àngel Cos Morera, Sergio Escalera Domínguez, David Sánchez, Maider Sánchez Padilla, Noelia Serrano Domínguez, Mireia Relats Vilageliu
INTRODUCTION: Sleep surfaces must adapt to individual somatotypic features to maintain a comfortable, convenient and healthy sleep, preventing diseases and injuries. Individually determining the most adequate rest surface can often be a complex and subjective question. OBJECTIVES: To design and validate an automatic multimodal somatotype determination model to automatically recommend an individually designed mattress-topper-pillow combination. METHODS: Design and validation of an automated prescription model for an individualised sleep system is performed through a single-image 2 D-3 D analysis and body pressure distribution, to objectively determine optimal individual sleep surfaces combining five different mattress densities, three different toppers and three cervical pillows...
July 21, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28675070/validity-of-heart-rate-measurements-by-the-garmin-forerunner-225-at-different-walking-intensities
#2
Jomme Claes, Roselien Buys, Andrea Avila, Dewar Finlay, Alan Kennedy, Daniel Guldenring, Werner Budts, Véronique Cornelissen
The accuracy of wrist worn heart rate monitors based on photoplethysmography (PPG) is not fully clinically accepted. Therefore, we aimed to validate heart rate measurements of a commercially available PPG heart rate monitor, i.e. the Garmin Forerunner(®) 225. Twelve healthy volunteers (six women; mean age: 28 years) performed a treadmill protocol consisting of: five minutes sitting, five minutes standing, 10 minutes walking at 4 km/h, 10 minutes walking at a gradient of 5% and intensity of 4-6 metabolic equivalents (METs), 10 minutes walking at a gradient of 8% and intensity of seven METs or more...
July 4, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28585476/harmonic-analysis-of-peripheral-pulse-for-screening-subjects-at-high-risk-of-diabetes
#3
G D Jindal, Rajesh Kumar Jain, Sushma N Bhat, Jyoti A Pande, Manasi S Sawant, Sameer K Jindal, Alaka K Deshpande
Power spectral density (PSD) of peripheral pulses in human has been investigated in the past for its clinical applications. Continuing the efforts, data acquired using Peripheral Pulse Analyser in research projects sponsored by Board of Research in Nuclear Sciences in 207 control subjects, 18 descendants of diabetic patients and 22 patients with systemic hypertension have been subjected to PSD analysis for its study of harmonics. Application software, named Pulse Harmonic Analyser specifically developed for this work, selected 131,072 samples from each data file, obtained PSD, derived 52 PHA parameters and saved them in an Excel sheet...
June 6, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28585460/assessment-of-knee-alignment-with-varus-and-valgus-force-through-the-range-of-flexion-with-non-invasive-navigation
#4
F Henderson, R Alho, P Riches, F Picard
In image-free total knee arthroplasty (TKA) navigation, infra-red markers are attached to bony landmarks to provide kinematic data intra-operatively, with the aim of improving the precision of implant placement. In non-invasive navigation, infra-red markers are attached to the skin surface, with recent evidence suggesting that this can give repeatable measurements of lower limb mechanical alignment. The aim of our study was to evaluate the use of a non-invasive navigation system in the assessment of mechanical alignment with applied coronal force through the range of flexion...
June 6, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28585459/standardisation-of-bioelectrical-impedance-analysis-for-the-estimation-of-body-composition-in-healthy-paediatric-populations-a-systematic-review
#5
Steven Brantlov, Lars Jødal, Aksel Lange, Søren Rittig, Leigh C Ward
BACKGROUND: Bioelectrical impedance analysis (BIA) requires a high degree of standardisation in order to ensure valid and reproducible impedance measurements. The overall aim of this review was to study the degree to which BIA papers conducted in healthy paediatric populations (aged 0-17 years) were standardised. METHODS: Literature was identified on the basis of a systematic search of internationally-recognised electronic databases and hand searching of the reference lists of the included papers in order to identify additional relevant papers...
June 6, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28585457/effect-of-geometric-parameters-in-the-design-of-customized-hip-implants
#6
Mangesh Dharme, Abhaykumar Kuthe
In this paper, the effects of geometric parameters on the development of stress in custom cementless hip implant have been studied. Taguchi methods and analysis of variance (ANOVA) were used to find out which geometric parameters are statistically significant for the maximum von Mises stresses in the hip implant. The multiple regression analysis was also performed, to replace the FE solver and accurately and quickly predict the stress values for new patients. Three parameters horizontal offset (HO), vertical offset and neck shaft angle (NSA), with three levels have been selected...
June 6, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28617185/correction-to-syrpailyne-wankhar-et-al-a-versatile-stretch-sensor-for-measuring-physiological-movement-using-a-centre-loaded-end-supported-load-cell
#7
(no author information available yet)
No abstract text is available yet for this article.
July 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28573938/long-term-gait-pattern-assessment-using-a-tri-axial-accelerometer
#8
Francesca De Cillis, Francesca De Simio, Roberto Setola
In this article, we present a pervasive solution for gait pattern classification that uses accelerometer data retrieved from a waist-mounted inertial sensor. The proposed algorithm has been conceived to operate continuously for long-term applications. With respect to traditional approaches that use a large number of features and sophisticated classifiers, our solution is able to assess four different gait patterns (standing, level walking, stair ascending and descending) by using three features and a decision tree...
July 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28573909/mobile-gait-analysis-via-eshoes-instrumented-shoe-insoles-a-pilot-study-for-validation-against-the-gold-standard-gaitrite-%C3%A2
#9
Harald Jagos, Katharina Pils, Michael Haller, Claudia Wassermann, Christa Chhatwal, Dietmar Rafolt, Frank Rattay
Clinical gait analysis contributes massively to rehabilitation support and improvement of in-patient care. The research project eSHOE aspires to be a useful addition to the rich variety of gait analysis systems. It was designed to fill the gap of affordable, reasonably accurate and highly mobile measurement devices. With the overall goal of enabling individual home-based monitoring and training for people suffering from chronic diseases, affecting the locomotor system. Motion and pressure sensors gather movement data directly on the (users) feet, store them locally and/or transmit them wirelessly to a PC...
July 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28447865/a-versatile-stretch-sensor-for-measuring-physiological-movement-using-a-centre-loaded-end-supported-load-cell
#10
Syrpailyne Wankhar, Albert A Kota, Dheepak Selvaraj
Acquisition of movement of some body parts can provide important physiological information. In clinical practice as well as for research purposes different types of sensors such as piezoelectric crystals, conductive rubber and optical displacement sensors are used for such measurements. Each of these sensors is associated with its problems. This paper discusses the use of a stretch sensor constructed using a small metal bar, approximately the size of a zipper slider that can be sewn into a fabric in the form of a belt...
July 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28447862/high-reliability-microcontroller-nerve-stimulator-for-assistance-in-regional-anaesthesia-procedures
#11
Carlos A Ferri, Antonio A F Quevedo
In the last decades, the use of nerve stimulators to aid in regional anaesthesia has been shown to benefit the patient since it allows a better location of the nerve plexus, leading to correct positioning of the needle through which the anaesthetic is applied. However, most of the nerve stimulators available in the market for this purpose do not have the minimum recommended features for a good stimulator, and this can lead to risks to the patient. Thus, this study aims to develop an equipment, using embedded electronics, which meets all the characteristics, for a successful blockade...
July 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28447860/remote-sensing-of-physiological-signs-using-a-machine-vision-system
#12
Ali Al-Naji, Kim Gibson, Javaan Chahl
The aim of this work is to remotely measure heart rate (HR) and respiratory rate (RR) using a video camera from long range (> 50 m). The proposed system is based on imperceptible signals produced from blood circulation, including skin colour variations and head motion. As these signals are not visible to the naked eye and to preserve the signal strength in the video, we used an improved video magnification technique to enhance these invisible signals and detect the physiological activity within the subject...
July 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28406346/a-novel-laparoscopic-grasper-with-two-parallel-jaws-capable-of-extracting-the-mechanical-behaviour-of-soft-tissues
#13
Dariush Nazarynasab, Farzam Farahmand, Alireza Mirbagheri, Elnaz Afshari
Data related to force-deformation behaviour of soft tissue plays an important role in medical/surgical applications such as realistically modelling mechanical behaviour of soft tissue as well as minimally invasive surgery (MIS) and medical diagnosis. While the mechanical behaviour of soft tissue is very complex due to its different constitutive components, some issues increase its complexity like behavioural changes between the live and dead tissues. Indeed, an adequate quantitative description of mechanical behaviour of soft tissues requires high quality in vivo experimental data to be obtained and analysed...
July 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28394662/validation-of-an-ambient-measurement-system-ams-for-walking-speed
#14
Jonathan S Varsanik, Zebadiah M Kimmel, Carl de Moor, Wendy Gabel, Glenn A Phillips
Walking speed is an important indicator of worsening in a variety of neurological and neuromuscular diseases, yet typically is measured only infrequently and in a clinical setting. Passive measurement of walking speed at home could provide valuable information to track the progression of many neuromuscular conditions. The purpose of this study was to validate the measurement of walking speed by a shelf-top ambient measurement system (AMS) that can be placed in a patient's home. Twenty-eight healthy adults (16 male, 12 female) were asked to walk three pre-defined routes two times each (total of 168 traversals)...
July 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28300460/smartphone-based-photoplethysmographic-imaging-for-heart-rate-monitoring
#15
Maha Alafeef
The purpose of this study is to make use of visible light reflected mode photoplethysmographic (PPG) imaging for heart rate (HR) monitoring via smartphones. The system uses the built-in camera feature in mobile phones to capture video from the subject's index fingertip. The video is processed, and then the PPG signal resulting from the video stream processing is used to calculate the subject's heart rate. Records from 19 subjects were used to evaluate the system's performance. The HR values obtained by the proposed method were compared with the actual HR...
July 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28398152/multichannel-intra-luminal-impedance-signals-variability-during-gastro-oesophageal-activities
#16
Bahaa Al-Sheikh, V Chandrasekar, Tom Stuebe
Multichannel intra-luminal impedance (MII) technique has been proven to be a successful diagnostic tool in detecting and displaying activities inside the oesophagus. It improves the diagnostic capability of oesophageal disorders since it gives accurate and more in-depth information about the activities inside the oesophagus, especially reflux episodes. A comparison is presented between normal and abnormal adults in terms of variability in MII signals during baselines and reflux episodes. A comparative study of episode duration for normal and abnormal subjects is presented...
May 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28256162/application-of-off-the-shelf-stereo-cameras-for-the-3d-assessment-of-morphometric-variations-caused-by-rhinoplasty
#17
Luigi Maria Galantucci, Fulvio Lavecchia, Patrizia Pastore, Gianluca Percoco
The present paper shows how a non-invasive and low-cost photogrammetric stereo device allows the assessment of morphometric variations of the nose following rhinoplasty. Six female patients, aged between 24 and 37 years, underwent 3D stereo-photogrammetric scanning. Three-dimensional computerised models were generated, extracting also information related to the coordinates of facial landmarks, distances between landmarks, angles, in pre- and postoperative situation. Two kinds of analysis were carried out: (i) statistical correlation between size variations and (ii) morphometric analysis, including General Procrustes Analysis (GPA), Principal Components Analysis (PCA) and Warping...
April 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28122477/design-and-preliminary-evaluation-of-a-self-steering-pneumatically-driven-colonoscopy-robot
#18
Hossein Dehghani, C Ross Welch, Abolfazl Pourghodrat, Carl A Nelson, Dmitry Oleynikov, Prithviraj Dasgupta, Benjamin S Terry
Colonoscopy is a diagnostic procedure to detect pre-cancerous polyps and tumours in the colon, and is performed by inserting a long tube equipped with a camera and biopsy tools. Despite the medical benefits, patients undergoing this procedure often complain about the associated pain and discomfort. This discomfort is mostly due to the rough handling of the tube and the creation of loops during the insertion. The overall goal of this work is to minimise the invasiveness of traditional colonoscopy. In pursuit of this goal, this work presents the development of a semi-autonomous colonoscopic robot with minimally invasive locomotion...
April 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28084110/a-novel-method-for-electronic-measurement-and-recording-of-surgical-drain-output
#19
Bernard Hendrik van Duren, Gijsbert Isaac van Boxel
Surgical drains are used to collect and measure fluids (e.g. serous fluid, lymph, blood, etc.). The volume of fluid in the container is measured using graded markings on the container and then recorded manually on a "drain chart" allowing for manual rate calculations. This method is dependant on regularly checking the volume of the drain and recording the value accurately; unfortunately, this is often not feasible due to staffing levels and time constraints. This results in inaccurate "drain charts" making clinical decisions based on these figures unreliable...
April 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28078908/comparison-of-wrist-worn-and-hip-worn-activity-monitors-under-free-living-conditions
#20
Trent A Hargens, Kayla N Deyarmin, Kelsey M Snyder, Allison G Mihalik, Lauren E Sharpe
PURPOSE: Current recommendations state that individuals engage in 150 min of moderate or 75 min of vigorous intensity physical activity (PA) each week. Commercial PA monitors are becoming popular for everyday use. The accuracy of these devices, however, is not well understood. We sought to examine the accuracy of two commercial devices, one wrist and one hip-worn, under free-living conditions. METHODS: Twenty-two subjects wore two commercially available devices and one ActiGraph (AG) for seven consecutive days under normal activity...
April 2017: Journal of Medical Engineering & Technology
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