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Journal of Medical Engineering & Technology

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https://www.readbyqxmd.com/read/29671367/3d-bio-printing-technology-for-body-tissues-and-organs-regeneration
#1
Esmaeil Biazar, Masoumeh Najafi S, Saeed Heidari K, Meysam Yazdankhah, Ataollah Rafiei, Dariush Biazar
In the last decade, the use of new technologies in the reconstruction of body tissues has greatly developed. Utilising stem cell technology, nanotechnology and scaffolding design has created new opportunities in tissue regeneration. The use of accurate engineering design in the creation of scaffolds, including 3D printers, has been widely considered. Three-dimensional printers, especially high precision bio-printers, have opened up a new way in the design of 3D tissue engineering scaffolds. In this article, a review of the latest applications of this technology in this promising area has been addressed...
April 19, 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29671366/a-new-approach-for-identification-of-heartbeats-in-multimodal-physiological-signals
#2
Omkar Singh, Ramesh Kumar Sunkaria
In this paper, a technique is proposed for detection of heartbeats in multimodal data. Recording of multiple physiological signals from the same subject is common practice nowadays. Multiple physiological signals are generally available but are processed separately without taking into consideration information from other relevant signals. The heartbeats are generally detected from R peaks in electrocardiogram (ECG) signal, however, if ECG is noisy, other signals reflecting the cardiac activity may be used for identifying heartbeats...
April 19, 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29582695/development-of-a-pressure-sensor-system-for-unobtrusive-monitoring-of-abdominal-muscle-activities
#3
Joonnyong Lee, Jonghyun Park, Kyu Jin Lee, Minkyung Cho, Keewon Kim, Hee Chan Kim, Sun Gun Chung
Surface electromyogram (sEMG) is often used by to objectively measure muscular activity during rehabilitation exercises. sEMG is accurate, but it is unsuitable for uses outside the clinic, and patients can benefit from an unobtrusive device which can be readily used to ubiquitously measure abdominal muscle activation. In this study, we present a pressure sensor system which can be latched onto a belt to measure abdominal muscle activation. sEMG and pressure sensor output were measured in 15 healthy young males during isometric trunk flexion exercise (public trials registration number, KCT0002351), and the results were highly correlated (median R > 0...
March 27, 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29575961/effect-of-magnetic-field-on-haemodynamic-perturbations-in-atherosclerotic-coronary-arteries
#4
Ashkan Javadzadegan, Abouzar Moshfegh, Masud Behnia
Haemodynamic perturbations including elevated blood viscosity, low and oscillatory shear stress are understood to be important pathogenic mediators in atherosclerosis. These haemodynamic abnormalities are influenced by the presence of a magnetic field. This study conducted computational fluid dynamics (CFD) analysis in 4 coronary artery models, derived from authentic human coronaries, with mild and moderate and severe stenosis severity. The aim was to investigate the effect of a static magnetic field of varying intensities on blood viscosity, areas of low wall shear stress (ALWSS), maximum wall shear stress (MWSS) and length and volume of flow recirculation zones...
March 26, 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29569983/the-development-of-a-novel-high-precision-major-depressive-disorder-screening-system-using-transient-autonomic-responses-induced-by-dual-mental-tasks
#5
Takemi Matsui, Toshikazu Shinba, Guanghao Sun
12.6% of major depressive disorder (MDD) patients have suicide intent, while it has been reported that 43% of patients did not consult their doctors for MDD, automated MDD screening is eagerly anticipated. Recently, in order to achieve automated screening of MDD, biomarkers such as multiplex DNA methylation profiles or physiological method using near infra-red spectroscopy (NIRS) have been studied, however, they require inspection using 96-well DNA ELIZA kit after blood sampling or significant cost. Using a single-lead electrocardiography (ECG), we developed a high-precision MDD screening system using transient autonomic responses induced by dual mental tasks...
March 23, 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29569970/spinal-dura-mater-biophysical-characteristics-relevant-to-medical-device-development
#6
Sean J Nagel, Chandan G Reddy, Leonardo A Frizon, Matthieu K Chardon, Marshall Holland, Andre G Machado, George T Gillies, Matthew A Howard, Saul Wilson
Understanding the relevant biophysical properties of the spinal dura mater is essential to the design of medical devices that will directly interact with this membrane or influence the contents of the intradural space. We searched the literature and reviewed the pertinent characteristics for the design, construction, testing, and imaging of novel devices intended to perforate, integrate, adhere or reside within or outside of the spinal dura mater. The spinal dura mater is a thin tubular membrane composed of collagen and elastin fibres that varies in circumference along its length...
March 23, 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29560773/acoustic-emission-technology-can-warn-of-impending-iatrogenic-femur-fracture-during-femoral-canal-preparation-for-uncemented-hip-replacement-a-cadaveric-animal-bone-study
#7
Pierre H M Pechon, Rhys Pullin, Mark J Eaton, Stephan A Jones, Sam Evans
During uncemented hip arthroplasty the femoral prosthesis can be fitted too tightly into the femoral canal, causing a hoop-stress fracture of the proximal femur. The research undertaken evaluated Acoustic Emission (AE) technology as a potential method of detecting a fracture forming in this manner, in an attempt to assess whether this technology may be used as a means of early warning of impending fracture during surgery. Deer femora were prepared in a manner similar to surgery and uncemented hip arthroplasty broaches were inserted until fracture occurred...
March 21, 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29498303/design-of-non-invasive-glucose-meter-using-near-infrared-technique
#8
Gameel Saleh, Fatimah Alkaabi, Noor Al-Hajhouj, Fatimah Al-Towailib, Safa Al-Hamza
Diabetics need to keep track of their blood glucose level and measure it regularly to determine their insulin dose intake and to ensure that glucose level is always within the normal range. In this article, a system that enables the measurement of blood glucose level non-invasively is designed. This article uses a near infra-red (NIR) transmittance spectroscopy, without drawing blood, puncturing the skin, or causing pain. It involves a light source and light detector circuits positioned on a certain region of the body...
February 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29493342/comparison-of-non-contact-infrared-skin-thermometers
#9
Thomas Fletcher, Aaron Whittam, Rob Simpson, Graham Machin
Non-contact infra-red skin thermometers (NCITs) are becoming more prevalent for use in medical diagnostics. Not only are they used as an alternative means of estimating core body temperature but also to assess the diabetic foot for signs of inflammation prior to ulceration. Previous investigations have compared the performance of NCITs in a clinical setting against other gold standard methods. However, there have been no previous investigations comparing the performance of NCITs in assessing temperature measurement capability traceable to the International Temperature Scale of 1990 (ITS-90)...
February 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29473767/computational-modeling-of-blast-induced-whole-body-injury-a-review
#10
Arnab Chanda, Christian Callaway
Blast injuries affect millions of lives across the globe due to its traumatic after effects on the brain and the whole body. To date, military grade armour materials are designed to mitigate ballistic and shrapnel attacks but are less effective in resisting blast impacts. In order to improve blast absorption characteristics of armours, the first key step is thoroughly understands the effects of blasts on the human body itself. In the last decade, a plethora of experimental and computational work has been carried out to investigate the mechanics and pathophysiology of Traumatic Brain Injury (TBI)...
February 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29448864/development-of-a-novel-6-dof-parallel-mechanism-moving-platform-for-investigating-the-effects-of-multimodal-sensory-feedback-information-regarding-postural-stability-in-humans
#11
Shuta Sato, Motoki Takagi, Tasuku Miyoshi
The purpose of this study was to develop a six-degree-of-freedom parallel mechanism moving platform to investigate the effects of multimodal sensory feedback information while standing upright. We constructed a custom-designed disturbance-applying instrument (DAI) consisting of a support surface suspended from eight pneumatic artificial muscles. The posture of the support surface was controlled with a proportional-integral-derivative (PID) feedback system using an infra-red camera-based real-time 3D motion capture system, and was estimated by step and frequency responses...
February 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29448856/study-of-target-and-non-target-interplay-in-spatial-attention-task
#12
Sweeti, Deepak Joshi, B K Panigrahi, Sneh Anand, Jayasree Santhosh
Selective visual attention is the ability to selectively pay attention to the targets while inhibiting the distractors. This paper aims to study the targets and non-targets interplay in spatial attention task while subject attends to the target object present in one visual hemifield and ignores the distractor present in another visual hemifield. This paper performs the averaged evoked response potential (ERP) analysis and time-frequency analysis. ERP analysis agrees to the left hemisphere superiority over late potentials for the targets present in right visual hemifield...
February 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29412054/design-of-a-stabilisation-platform-for-parkinson-s-disease-patient
#13
Luay Fraiwan, Safi Amir, Fahad Ahmed, Junaid Halepota
There are an increased number of patients all over the world suffering from postural tremors and rest tremors, the types of tremors associated with Parkinson's disease and other neurodegenerative diseases such as amyotrophic lateral sclerosis. Currently, there is no cure for such disease and patients have to deal with their condition to continue their life normally with the existing of some helpful instruments. This work presents a self-stabilising Parkinson's disease (PD) Tray (platform) that can help them to carry objects that they hold with their hand...
January 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29412053/design-of-a-new-artificial-breathing-system-for-simulating-the-human-respiratory-activities
#14
Elmaati Essoukaki, Mourad Rattal, Lhoucine Ben Taleb, Mohammed Harmouchi, Abdelhadi Assir, Azeddine Mouhsen, Aissam Lyazidi
The purpose of this work is the conception and implementation of an artificial active respiratory system that allows the simulation of human respiratory activities. The system consists of two modules, mechanical and electronical. The first one represents a cylindrical lung adjustable in resistance and compliance. This lung is located inside a transparent thoracic box, connected to a piston that generates variable respiratory efforts. The parameters of the system, which are pressure, flow and volume, are measured by the second module...
January 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29300116/comparative-analysis-of-classification-based-algorithms-for-diabetes-diagnosis-using-iris-images
#15
Piyush Samant, Ravinder Agarwal
Photo-diagnosis is always an intriguing area for the researchers, with the advancement of image processing and computer machine vision techniques it have become more reliable and popular in recent years. The objective of this paper is to study the change in the features of iris, particularly irregularities in the pigmentation of certain areas of the iris with respect to diabetic health of an individual. Apart from the point that iris recognition concentrates on the overall structure of the iris, diagnostic techniques emphasises the local variations in the particular area of iris...
January 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29256765/design-characterisation-and-evaluation-of-a-soft-robotic-sock-device-on-healthy-subjects-for-assisted-ankle-rehabilitation
#16
Fan-Zhe Low, Jeong Hoon Lim, Chen-Hua Yeow
Motor impairment is one of the common neurological conditions suffered by stroke patients, where this chronic immobility together with the absence of early limb mobilisation can lead to conditions such as joint contracture with spastic limbs. In this study, a soft robotic sock device was developed, which can provide compliant actuation to the ankle joint in the early stage of stroke recovery. The device is fitted with soft extension actuators and when the actuators are inflated, they extend and guide the foot into plantarflexion; upon deflation, the actuators will resume their initial conformations...
January 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29251059/epileptic-seizure-detection-using-dwt-based-approximate-entropy-shannon-entropy-and-support-vector-machine-a-case-study
#17
A Sharmila, Suman Aman Raj, Pandey Shashank, P Mahalakshmi
In this work, we have used a time-frequency domain analysis method called discrete wavelet transform (DWT) technique. This method stand out compared to other proposed methods because of its algorithmic elegance and accuracy. A wavelet is a mathematical function based on time-frequency analysis in signal processing. It is useful particularly because it allows a weak signal to be recovered from a noisy signal without much distortion. A wavelet analysis works by analysing the image and converting it to mathematical function which is decoded by the receiver...
January 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29251031/correlation-between-time-lag-of-arterial-plethysmographic-waveforms-and-systemic-vascular-resistance-a-prospective-study
#18
Radhakrishnan Muthuchellappan, Ramesh V J, Umamaheswara Rao Ganne S, Thennarasu K, Anjana Jacob, Sripathy G, Bhadrinarayan V, Mohanvelu K
Blood pressure (BP), a surrogate of cardiac output (CO), is also dependent on systemic vascular resistance (SVR). But SVR is not routinely monitored in daily clinical practice. We hypothesise that the time difference between the peripheral arterial waveform and the finger plethysmographic waveform (time lag index - TLi) could indicate the systemic vascular resistance. In this study, we correlated TLi with the systemic vascular resistance measured by minimally invasive CO monitor (pulse contour analysis). SVR changes in response to administration of mannitol were studied...
January 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29188743/a-case-study-on-discrete-wavelet-transform-based-hurst-exponent-for-epilepsy-detection
#19
Saiby Madan, Kajri Srivastava, A Sharmila, P Mahalakshmi
Epileptic seizures are manifestations of epilepsy. Careful analysis of EEG records can provide valuable insight and improved understanding of the mechanism causing epileptic disorders. The detection of epileptic form discharges in EEG is an important component in the diagnosis of epilepsy. As EEG signals are non-stationary, the conventional frequency and time domain analysis does not provide better accuracy. So, in this work an attempt has been made to provide an overview of the determination of epilepsy by implementation of Hurst exponent (HE)-based discrete wavelet transform techniques for feature extraction from EEG data sets obtained during ictal and pre ictal stages of affected person and finally classifying EEG signals using SVM and KNN Classifiers...
January 2018: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29117761/full-driving-soft-robotic-colonoscope-in-compliant-colon-tissue
#20
Kundong Wang, Jiayi Ma, Feng Wang, Zhiwu Wang, Guozheng Yan, Yilu Zhou
Robotic colonoscopy is an efficient examination method for finding malignant tumour in its early stage. This research developed a novel robotic endoscope with 13 mm diameter, 105 mm length and 22.3 g weight. A contact biomechanical model is proposed to increase the locomotion safety and efficiency in the soft tissue. The model shows that the friction difference between the robot and the tissue is a key factor to locomotion capability. A soft, full bellow with excellent compatibility was designed to package the robot body...
November 9, 2017: Journal of Medical Engineering & Technology
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