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Journal of Medical Engineering & Technology | Page 2

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https://read.qxmd.com/read/30875263/a-three-dimensional-finite-element-analysis-of-the-human-hip
#21
Mohammad Akrami, Kim Craig, Mahdieh Dibaj, Akbar A Javadi, Abdelmalek Benattayallah
A three-dimensional hip model was created from the MRI scans of one human subject based on constructing the entire pelvis and femur. The ball and socket joint was modelled between the hip's acetabulum and the femoral head to analyse the multiaxial loads applied in the hip joint. The three key ligaments that reinforce the external surface of the hip to help to stabilise the joint were also modelled which are the iliofemoral, the pubofemoral and ischiofemoral ligaments. Each of these ligaments wraps around the joint connection to form a seal over the synovial membrane, a line of attachment around the head of the femur...
March 15, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30875262/evaluation-of-time-domain-features-using-best-feature-subsets-based-on-mutual-information-for-detecting-epilepsy
#22
A Sharmila, P Geethanjali
In this pattern recognition study of detecting epilepsy, the first time the authors have attempted to use time domain (TD) features such as waveform length (WL), number of zero-crossings (ZC) and number of slope sign changes (SSC) which are extracted from the discrete wavelet transform (DWT) for the detecting the epilepsy for University of Bonn datasets and real-time clinical data. The performance of these TD features is studied along with mean absolute value (MAV) which has been attempted by other researchers...
March 15, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30774016/construction-of-lumped-parameter-cardiovascular-models-using-the-cellml-language
#23
Yubing Shi, Patricia Lawford, D Rodney Hose
Lumped-parameter models are widely used by cardiovascular researchers in the analysis of the circulatory dynamics. However, portability and model exchange have always been a problem, with different researchers implement the model differently. To improve the situation, in this study, a group of lumped-parameter cardiovascular system models with different levels of complexity have been implemented using the CellML mark-up language. The models have been curated and made publicly available in the CellML model repository, and the purpose of this paper is to provide further technical details to support the usage of these models by the research community...
February 18, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30773957/phonocardiogram-classification-using-deep-neural-networks-and-weighted-probability-comparisons
#24
Miguel Sotaquirá, Demián Alvear, Misael Mondragón
Cardiac auscultation is one of the most conventional approaches for the initial assessment of heart disease, however the technique is highly user-dependent and with low repeatability. Several computational approaches based on the analysis of the phonocardiograms (PCG) have been proposed to classify heart sounds into normal or abnormal, but most often do not achieve acceptable levels of sensitivity (Se) and specificity (Sp) or require the use of special hardware. We propose a novel approach for classification of PCG...
February 18, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30773952/an-ecg-simulator-with-a-novel-ecg-profile-for-physiological-signals
#25
Jan-Christoph Edelmann, Dominik Mair, Daniel Ziesel, Martin Burtscher, Thomas Ussmueller
This work introduces a low-cost open-source electrocardiography (ECG) simulator comprising both MATLAB software for signal generation and a dedicated circuit board for signal output via a commercial sound card. Synthetic, rate-dependent ECG simulation is based on third-order polynomials that are calculated in sections for the main waves and spikes, respectively. Besides the heart rate, the output profile is fully adjustable with respect to Einthoven lead signals I-III, the amplitudes of the individual ECG waves and spikes, as well as the constitution and intensity of common distortions...
February 18, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30664386/challenges-in-developing-collaborative-interdisciplinary-research-between-gastroenterologists-and-engineers
#26
Gerard Cummins, Ben F Cox, Jack D Walker, Sandy Cochran, Marc P Y Desmulliez
The role of technology in healthcare is rapidly evolving. However, it can be argued that gastroenterology has not kept pace with other medical fields due to the multifaceted needs of this speciality and other issues. Innovation in healthcare technology increasingly requires interdisciplinary collaboration between engineers and clinicians. Nevertheless, working in such an interdisciplinary environment can be challenging due to factors such as working culture, communication and difference in priorities. We surveyed the views of clinicians specialising in gastroenterology and engineers on interdisciplinary health research...
January 21, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30657356/surgical-sponge-blood-salvage-spinning-device-design-and-testing
#27
Peter K Moua, Christopher L Nguyen, David A Piotrowski, Mitchell J Resch, Tasnia Tabassum, Kenneth Noonan, Amit J Nimunkar
One method to clear intraoperative blood from the surgical field is to remove blood with surgical sponges. Currently, absorbed blood cannot be retrieved effectively and is lost. A spinning device was created to salvage red blood cells from the sponges. With this device the sponges are gently washed with saline and the resultant bloody fluid can be delivered to a cell saver to prepare it for autologous blood transfusion. In this article, we demonstrate how a novel sponge extractor can be used to extract blood from sponges...
January 18, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30648454/design-and-validation-of-a-smart-wearable-device-to-prevent-recurrent-ankle-sprain
#28
Mohammed Attia, Mona F Taher, Aliaa Rehan Youssef
Lateral ankle sprain is one of the most common ankle injuries, especially in sports. When not treated properly, chronic ankle instability (CAI) may develop causing recurrent sprains and permanent damage to ankle ligaments. In this study, the design, implementation and validation of a smart wearable device connected to a smartphone application is described. This device can predict and prevent the occurrence of ankle sprain. Prediction of potentially harmful motion is achieved by continuous monitoring of ankle kinematics using inertial motion sensors...
January 16, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30608192/on-the-cooling-effect-of-flowing-blood-on-hepatic-tumor-ablation-process
#29
Naseer Hameed Hamza
One method of removing malignant tissues from human organs is radiofrequency ablation. Thermal radiofrequency is a common technique of liver tumour therapy, which depends mainly on heating the infected region. This work proposes to investigate the thermal issue, which - in instance of excessive current - leads to extra lesion in liver tissues. However, the thermal lesions and the mistakes occurred in positioning the trocar instrument in the correct and accurate place arise the need to simulate and prediction of the thermal and electrical behaviour of the ablation operation...
January 4, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30608185/design-and-validation-of-a-simple-automated-optical-step-counting-method-for-treadmill-walking
#30
Joseph M Mahoney, Zackery E Scalyer, Matthew B Rhudy
BACKGROUND: Reliable step counting is a critical part of locomotion research. Current counting methods can be inaccurate, time consuming, expensive or encumbering to the subject. Here, we present a camera-based optical method for automatically counting steps. METHODS: Fifteen healthy adults walked, jogged and ran on a treadmill at three different constant speeds (1.21, 2.01, 2.68 m/s) and once at varying speed (1.21-2.68 m/s) for 90 s. Subjects had visual marker affixed to their left foot while walking...
January 4, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30608179/shape-memory-alloy-reinforced-5-mm-ultra-thin-rigid-link-surgical-instrument-with-force-feedback
#31
K B Karthikeyan, V Nithya
We report the development of a rigid link surgical instrument for surgical robotics. The device is only 5 mm in diameter and equipped with a shape memory alloy for better gripping, which avoids the use of mechanical gears. This ultra-thin instrument has a unique force sensor mount at the gripper to capture forces as low as 288 mN from the surgical site. The gripper is controlled by a 0.5 mm cable that drives the 3-Degrees of Freedom movement for the dexterity. This mechanically robust instrument can pave the way for the realisation of compact and low cost surgical instruments for real world applications in medical robotics...
January 4, 2019: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30499728/structure-and-motion-design-of-a-mock-circulatory-test-rig
#32
Yuhui Shi, Theodosios Korakianitis, Zhongjian Li, Yubing Shi
Mock circulatory test rig (MCTR) is the essential and indispensable facility in the cardiovascular in vitro studies. The system configuration and the motion profile of the MCTR design directly influence the validity, precision, and accuracy of the experimental data collected. Previous studies gave the schematic but never describe the structure and motion design details of the MCTRs used, which makes comparison of the experimental data reported by different research groups plausible but not fully convincing...
November 30, 2018: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30465704/a-novel-eog-based-wireless-rapid-communication-device-for-people-with-motor-neuron-diseases
#33
Ali Bulent Usakli, Serkan Gurkan, Guray Gurkan, Alper Kaya
In this study, a new electrooculography (EOG) based system that provides efficient communication for people suffered from motor neuron diseases is presented. The system consists of two distinct devices. The first device operates as a main unit that is activated by the subject's eye movements. This unit is capable of transmitting 10 different command/state messages. These messages enable subject to choose his/her situation such as "I'm fine", "I feel bad", "I'm hungry" and "I'm thirsty"...
November 22, 2018: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30465700/epilepsy-detection-from-eeg-signals-a-review
#34
A Sharmila
Over many decades, research is being attempted for the detection of epileptic seizure to support for automatic diagnosis system to help clinicians from burdensome work. In this respect, an enormous number of research papers is published for identification of epileptic seizure. It is difficult to present a detailed review of all these literature. Therefore, in this paper, an attempt has been made to review the detection of an epileptic seizure. More than 100 research papers have been discussed to discern the techniques for detecting the epileptic seizure...
November 22, 2018: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30465695/a-low-cost-stereophotogrammetric-system-for-the-evaluation-of-tridimensional-head-translations-during-visual-tasks
#35
Cláudia de Almeida Ferreira Diniz, Marcus Vinícius Faleiro de Andrade, Bruno Philip Alves da Silva, Maria Lúcia Machado Duarte, Lázaro Valentin Donadon, Ricardo Guimarães, Márcia Guimarães
A simple, low cost and easy-to-operate 3D stereophotogrammetry system was developed to measure the kinematic pattern of head stabilisation during visual tasks. The system differs from commercially available ones since it: (a) takes into account the gaze motor coordination characteristics and measures the head translations quantified at the point that best represents the translations caused by the eyes' movement during visual tasks, that is, the midpoint between the eyes; (b) offers minimum restriction to the head movement and minimum interference with it; (c) innovates when using the position coordinates produced by a free-online tracker software...
November 22, 2018: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30422735/fatigue-and-microgap-behaviour-of-a-three-unit-implant-fixed-dental-prosthesis-combining-conventional-and-dynamic-abutments
#36
José Rocha Ferreira, Nannan Song, Margarida Machado, Luís Machado, André Correia, Ana Reis
This is an in vitro study composed by a fatigue test followed by an optical microscopy analysis. Dynamic abutments concept, recently introduced on screw-retained implant dental prosthesis, consists on the screw channel customisation according to the individual needs of each rehabilitation. Geometry and tightening torque differences advise the assessment of their mechanical performance. Clarify whether the combination of dynamic and conventional abutments in a three-unit implant-fixed prosthesis has detrimental effects either on the mechanical performance under cyclic loading or on the implant-abutment microgap dimensions...
November 13, 2018: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30324857/quantification-of-error-between-the-heartbeat-intervals-measured-form-photoplethysmogram-and-electrocardiogram-by-synchronisation
#37
Srinivas Kuntamalla, Ram Gopal Reddy Lekkala
Currently, heartbeat intervals required for the analysis of heart rate variability (HRV) are derived from electrocardiogram (ECG). Many investigators have explored the possibility of using photoplethysmography (PPG), for the analysis of HRV. However, all these studies are based on statistical approach and have used the correlation coefficient for the comparison of HRV data obtained using ECG and PPG, which is inappropriate as the causal relationship between the R-peaks in ECG and the systolic peaks in PPG is well known in physiology...
October 16, 2018: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30324856/a-custom-made-interface-to-integrate-recording-of-pulse-rate-and-blood-pressure-during-urodynamics-investigations
#38
Ian J S Boddy, Simon Fulford, Charlotte R Kemp
Patients with a spinal cord injury above the 6th thoracic vertebrae may be prone to autonomic dysreflexia (AD) in response to bladder stimulus associated with a urodynamics investigation. It is essential that these patients are managed carefully in the urodynamics clinic in order to prevent life-threatening hypertension and bradycardia. Part of this management is the measurement and manual recording of pulse rate (PR) and non-invasive blood pressure (NIBP), alongside the standard urodynamics data set. The purpose of recording these additional data is to identify the characteristic drop in PR and rise in NIBP that indicates the onset of AD...
October 16, 2018: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30324840/a-wearable-comprehensive-data-sampling-system-for-gait-analysis
#39
Zheng Fang, Zheng Yang, Qian Wang, Chao Wang, Siyuan Chen
Gait analysis is important for lower limb movement evaluation and rehabilitation research. More and more laboratories focus on it. Researchers need biomechanical data sampling equipment to obtain original signals for their analysis, sometimes even need kinds of signals for data fusion processing. But, the market supply of relative products is very limited. Moreover, one device acquires only one kind of signal, and needs computer as the control centre. So, there are two problems: moving range limitation, and synchronisation in data fusion processing...
October 16, 2018: Journal of Medical Engineering & Technology
https://read.qxmd.com/read/30251574/a-quality-improvement-study-for-medical-devices-usage-in-an-acute-healthcare-setting
#40
Shona Michael, Tapiwa Marvin Mapunde, Nick Elgar, Joel Brown
The objectives of this study were, for a large NHS Trust, to (1) Implement a medical devices training information system which connects the medical equipment inventory to the electronic staff record. (2) Monitor the changes in safety-related practice in the Trust after implementation (3) Examine the association between training compliance and Trust-wide adverse incident data for high risk medical devices. (4) Identify possible gaps in training course content from adverse incident data. A new system was made available, showing medical devices training records for staff in each location...
September 25, 2018: Journal of Medical Engineering & Technology
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