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Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine

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https://www.readbyqxmd.com/read/30387688/novel-insole-design-for-diabetic-foot-ulcer-management
#1
Arnab Chanda, Vinu Unnikrishnan
Around the world, over 400 million people suffer from diabetes. In a chronic diabetic condition, the skin underneath the foot often becomes extremely soft and brittle, resulting in the development of foot ulcers. In literature, a plethora of footwear designs have been developed to reduce the induced stresses on a diabetic foot and to consequently prevent the incidences of foot ulcers. However, to date, no insole design exists which can handle post-ulcer diabetic foot conditions without hindering the mobility of the patients...
November 2, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30370823/incontinence-the-engineering-challenge
#2
Alan Cottenden
No abstract text is available yet for this article.
October 29, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30355029/challenges-in-developing-a-magnetic-resonance-compatible-haptic-hand-controller-for-neurosurgical-training
#3
Yaser Maddahi, Kourosh Zareinia, Boguslaw Tomanek, Garnette R Sutherland
A haptic device is an actuated human-machine interface utilized by an operator to dynamically interact with a remote environment. This interaction could be virtual (virtual reality) or physical such as using a robotic arm. To date, different mechanisms have been considered to actuate the haptic device to reflect force feedback from the remote environment. In a low-force environment or limited working envelope, the control of some actuation mechanisms such as hydraulic and pneumatic may be problematic. In the development of a haptic device, challenges include limited space, high accuracy or resolution, limitations in kinematic and dynamic solutions, points of singularity, dexterity as well as control system development/design...
October 24, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30345887/first-prototype-of-emg-controlled-power-hand-orthosis-for-restoring-hand-extension-in-stroke-patients
#4
Shima Fardipour, Mahmood Bahramizadeh, Mokhtar Arazpour, Amir Salar Jafarpishieh, Mojtaba Azimian
Weakness in finger extensors is a common post-stroke deficit that can disturb hand functioning. Despite introducing several powered hand orthoses in literature, most of these devices focused on providing finger flexion. There is a little consideration for providing active hand extension in stroke patients. Moreover, in many devices, the finger extensions were restored passively by spring component. In this study, a new Electromyography (EMG)-controlled powered hand orthosis was designed to improve hand function by restoring and training hand extension in stroke patients with paretic hand...
October 21, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30340442/an-experimental-study-of-friction-between-volar-forearm-skin-and-nonwoven-fabrics-used-in-disposable-absorbent-products-for-incontinence
#5
Sabrina S Falloon, Vasileios Asimakopoulos, Alan M Cottenden
Incontinence-associated dermatitis is common among wearers of absorbent incontinence products and friction between product materials and skin is thought to be a contributing factor, but the details of its role are unclear. In this study, friction was measured between the dry volar forearm of 19 women (20-95 years) and five nonwovens typical of those in commercial disposable products. Euler's model/Amontons' law held to high precision for all person-fabric pairs for both static and dynamic friction, despite substantial variations in forearm size, soft tissue compliance and skin smoothness between subjects, sometimes substantial lateral contraction in fabric strips, and skin rucking beneath them...
October 19, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30319058/retraction-notice
#6
(no author information available yet)
No abstract text is available yet for this article.
October 15, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30319035/endoworm-a-new-semi-autonomous-enteroscopy-device
#7
Carlos Sánchez-Diaz, Esther Senent-Cardona, Vicente Pons-Beltran, Alberto Santonja-Gimeno, Ana Vidaurre
Using enteroscopes with therapeutic capacity to explore the small intestine entails certain limitations, including long exploration times, patient discomfort, the need for sedation, a high percentage of incomplete explorations and a long learning curve. This article describes the advances and setbacks encountered in designing the new Endoworm enteroscopy system, a semi-autonomous device consisting of a control unit and three cavities that inflate and deflate in such a way that the bowel retracts over the endoscope...
October 15, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30309288/assessment-of-material-loss-of-retrieved-magnetically-controlled-implants-for-limb-lengthening
#8
Bryan Foong, Vasiliki-Christina Panagiotopoulou, Harry S Hothi, Johann Henckel, Peter R Calder, David W Goodier, Alister J Hart
PURPOSE: We aimed to understand wear from the telescopic component of PRECICE nails, which are used for distraction osteogenesis of the femur or tibia. We also aimed to identify any correlation between implant performance and patient factors. METHODS: This retrieval study involved 11 magnetically controlled intramedullary nails from nine patients who had achieved the targeted leg length. All the nails were assessed macroscopically and microscopically for wear. All implants were radiographed to assess the internal mechanism...
October 11, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30309283/density-estimation-based-on-the-hounsfield-unit-value-of-cone-beam-computed-tomography-imaging-of-the-jawbone-system
#9
Maya Genisa, Solehuddin Shuib, Zainul Ahmad Rajion, Erry Mochamad Arief, Maman Hermana
The aim of this study is to investigate the estimation of density from the Hounsfield unit of cone beam computed tomography data in dental imaging, especially for dental implant application. A jaw phantom with various known densities of anatomical parts (e.g. soft tissue, cortical bone, trabecular bone, tooth enamel, tooth dentin, sinus cavity, spinal cord and spinal disc) has been used to test the accuracy of the Hounsfield unit of cone beam computed tomography in estimating the mechanical density (true density)...
October 11, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30284941/in-vitro-investigation-into-the-forces-involved-during-lipofilling
#10
Laura J Leslie, Yezen Sheena, Duncan Et Shepherd, Amir Ismail, Stephen N Kukureka, Vik Vijh
Breast augmentation using implants is the most common aesthetic and reconstructive breast surgical procedure. Complications such as implant rupture maybe related to surgical technique and damage to the implant. Autologous fat transfer (lipofilling) using metallic cannulae has become a standard adjunctive, yet there is little evidence on lipofilling safety in the presence of implants. The aims of this study are to verify the effects of different cannulae and to quantify the forces applied by surgeons during lipofilling...
October 4, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30280643/a-subject-specific-integrative-biomechanical-framework-of-the-pelvis-for-gait-analysis
#11
Emiliano P Ravera, Marcos J Crespo, Paola A Catalfamo Formento
Analysis of the human locomotor system using rigid-body musculoskeletal models has increased in the biomechanical community with the objective of studying muscle activations of different movements. Simultaneously, the finite element method has emerged as a complementary approach for analyzing the mechanical behavior of tissues. This study presents an integrative biomechanical framework for gait analysis by linking a musculoskeletal model and a subject-specific finite element model of the pelvis. To investigate its performance, a convergence study was performed and its sensitivity to the use of non-subject-specific material properties was studied...
October 3, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30269653/a-novel-variable-stiffness-flexible-manipulator-actuated-by-shape-memory-alloy-for-minimally-invasive-surgery
#12
Yanfei Cao, Feng Ju, Lei Zhang, Dongming Bai, Fei Qi, Bai Chen
This article presents a novel variable-stiffness flexible manipulator for minimally invasive surgery. Each module of the proposed manipulator contains a variable-stiffness mechanism actuated by proactive deformation of shape memory alloy. Due to low driving current, apparent mechanical deformation, suitable phase transformation temperature and biocompatibility of shape memory alloy wire actuation, it is well suited for the manipulator applied in minimally invasive surgery, where variable stiffness is urgently required...
September 29, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30223718/prediction-of-in-vivo-lower-cervical-spinal-loading-using-musculoskeletal-multi-body-dynamics-model-during-the-head-flexion-extension-lateral-bending-and-axial-rotation
#13
Hao Diao, Hua Xin, Zhongmin Jin
Cervical spine diseases lead to a heavy economic burden to the individuals and societies. Moreover, frequent post-operative complications mean a higher risk of neck pain and revision. At present, controversy still exists for the etiology of spinal diseases and their associated complications. Knowledge of in vivo cervical spinal loading pattern is proposed to be the key to answer these questions. However, direct acquisition of in vivo cervical spinal loading remains challenging. In this study, a previously developed cervical spine musculoskeletal multi-body dynamics model was utilized for spinal loading prediction...
September 17, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30175939/analysis-of-grip-and-pinch-strength-using-inverse-dynamics-simulation-technique
#14
Krishnakumar Sankar, Shantanu Patil, Sridhar Krishnamurthy
Grip strength is the function of musculotendinous action across the finger joints and varies while dealing objects of varying size and shape. Increasing object size requires greater effort by the fingers to grip. The main objective of this study is to analyse the variation in grip and pinch strength exerted on objects of various sizes and shapes in a short span of time. OpenSim 3.3 is open-source musculoskeletal modelling software used for performing simulations in a dynamic environment. The generic wrist model in OpenSim has movements on index finger and thumb only, for study purpose...
September 3, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30156126/an-investigation-of-laboratory-test-methods-for-predicting-the-in-use-leakage-performance-of-urine-absorbing-aids-in-nursing-homes
#15
Alan Cottenden, Margaret Macaulay
The absorption before leakage method for measuring the absorption capacity of urine-absorbing aids was investigated. Along with the existing international standard (ISO 11948-1:1996, the Rothwell method), it was run on 12 experimental products whose in-use leakage performance was established by 55 incontinent nursing home residents. Methods were evaluated by considering their simplicity, their repeatability within - and their reproducibility between - six laboratories, and their correlation with in-use product performance...
August 29, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30131022/review-of-urinary-continence-care-products-using-sensor-technology-to-improve-effectiveness
#16
Gyeonghui Jeong, Sangsoo Park
There have been many treatment and management modalities for urinary incontinence including absorbent products and urine collecting devices, but these modalities are manual in nature, requiring significant time and effort from caregivers. Recently, the application of sensor technology for urine detection in absorbent products and urine collection devices has helped to create new modalities for urinary incontinence and to automate some of the incontinence care processes. In this article, we review the new products and devices for incontinence care which make use of urine detection sensors...
August 22, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30319022/influence-of-vertical-misfit-in-screw-fatigue-behavior-in-dental-implants-a-three-dimensional-finite-element-approach
#17
Mikel Abasolo, Josu Aguirrebeitia, Javier Vallejo, Joseba Albizuri, Ibai Coria
Misfit is unavoidable in dental implant-supported prostheses due to machining process or inappropriate assembling, and the definition of an admissible misfit is still a controversial issue. This work aims to understand the behavior of the screws in dental implant-supported prostheses to estimate an admissible vertical misfit value in terms of screw fatigue failure. For that purpose, a finite element model of a dental implant-supported prosthesis was created and analyzed. Vertical misfits were introduced in different positions, the lower and upper screws were tightened to the bolting force values recommended by the manufacturer, and two different occlusal loads were analyzed...
November 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30191771/evaluation-of-setting-time-and-compressive-strength-of-a-new-bone-cement-precursor-powder-containing-mg-na-ca
#18
Mohammad Hossein Esnaashary, Hamid Reza Rezaie, Alireza Khavandi, Jafar Javadpour
Taking the advantage of a novel magnesium phosphate precursor containing Na and Ca, the cementation rate of the cement, including only Mg/Mg-Na-Ca, was studied. Besides, two effective parameters, that is, calcination temperature, 650 °C and 800 °C, and powder-to-cement liquid ratio, 1 and 1.5 g/mL, were assessed. X-ray diffraction, scanning electron microscopy, ion chromatography, particle size analyser, Vicat needle and compression test were used to characterize the powders and obtained cements. The sample containing Mg-Na-Ca, calcined at 800 °C with powder-to-cement liquid ratio of 1...
October 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30191754/in-vitro-study-of-antimicrobial-and-cell-viability-on-newly-synthesized-bioglass-based-bone-grafts-effects-of-selenium-and-silver-additions
#19
B Aksakal, M Demirel
Selenium (Se)- and Silver (Ag)-doped Bioglass® -based biografts were synthesized using the sol-gel method. Fourier-transform infrared spectroscopy, inductively coupled plasma mass spectrometry, scanning electron microscopy and energy-dispersive X-ray analyses were carried out in order to examine mechanostructure of synthesized bioglass-based bioceramics. The effects of Se and Ag additions on cell viability were investigated via cytotoxicity and antibacterial activity analysis, respectively. The bacteria of Escherichia coli ( E...
October 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/30191747/patient-specific-mobility-assessment-to-monitor-recovery-after-total-hip-arthroplasty
#20
Paolo Gargiulo, Kyle Joseph Edmunds, Magnús K Gíslason, Chase Latour, Þröstur Hermannsson, Luca Esposito, Paolo Bifulco, Mario Cesarelli, Massimiliano Fraldi, Luca Cristofolini, Halldór Jónsson
Total hip arthroplasty is a ubiquitously successful orthopedic surgical procedure, whose prevalence is rising worldwide. While many investigations focus on characterizing periprosthetic pathophysiology, the objective of our research is to develop and describe multi-metric assemblies as a first step toward creating a patient-specific mobility index that rehabilitators and orthopedic surgeons can utilize for prescribing their respective procedures. In total, 48 total hip arthroplasty patients (both cemented and uncemented) undergoing unilateral, primary surgery went through computed tomographic scans and gait analysis measurements both before and 1 year following their surgery...
October 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
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