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Journal of Medical Engineering & Technology

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https://www.readbyqxmd.com/read/28301285/wireless-power-transfer-for-a-pacemaker-application
#1
Vladimir Vulfin, Shai Sayfan-Altman, Reuven Ianconescu
An artificial pacemaker is a small medical device that uses electrical impulses, delivered by electrodes contracting the heart muscles, to regulate the beating of the heart. The pacemaker is implanted under the skin, and uses for many years regular non-rechargeable batteries. However, the demand for rechargeable batteries in pacemakers increased, and the aim of this work is to design an efficient charging system for pacemakers.
March 16, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28300460/smartphone-based-photoplethysmographic-imaging-for-heart-rate-monitoring
#2
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...
March 16, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28277813/power-optimisation-for-wearable-heart-rate-measurement-device-with-wireless-charging
#3
G Kiruthiga, A Sharmila, P Mahalakshmi, M Muruganandam
Continuous measurement of heart rate is necessary for monitoring the patients with heart ailments. A wearable which continuously measures heart rate of an individual by a method called reflectance-based photoplethysmography (PPG) computes the heart rate of an individual according to the volumetric changes in blood flowing through the body is developed. In order to make the device more compact as well as with IP67 and IP68 standard, wireless charging technique is employed because it helps to get rid of wires while charging...
March 9, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28140699/review-on-different-experimental-techniques-developed-for-recording-force-deformation-behaviour-of-soft-tissues-with-a-view-to-surgery-simulation-applications
#4
Elnaz Afshari, Mostafa Rostami, Farzam Farahmand
Different experimental techniques which have been developed to obtain data related to force-deformation behaviour of soft tissues play an important role in realistically simulating surgery processes as well as medical diagnoses and minimally invasive procedures. Indeed, an adequate quantitative description of soft-tissue-mechanical-behaviour requires high-quality experimental data to be obtained and analysed. In this review article we will first scan the motivations and basic technical issues on surgery simulation...
January 31, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28122478/a-no-moving-parts-sensor-for-the-detection-of-eye-fixation-using-polarised-light-and-retinal-birefringence-information
#5
Boris I Gramatikov, David L Guyton
Polarised near-infra-red light is reflected from the foveal area in a detectable bow-tie pattern of polarisation states, offering the opportunity for eye tracking. A coaxial optical transducer was developed, consisting of a laser diode, a polariser, a filter, and a photodetector. Several such transducers may be used to interrogate different spots on the retina, thus eliminating the requirement for scanning systems with moving parts. To test the signal quality obtainable, using just one transducer, a test subject was asked to fixate successively on twelve targets located on a circle around the transducer, to simulate the retina's being interrogated by twelve sensors placed on a 3(0) diameter circle surrounding the projection of the fovea...
January 26, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28122477/design-and-preliminary-evaluation-of-a-self-steering-pneumatically-driven-colonoscopy-robot
#6
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...
January 26, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28084110/a-novel-method-for-electronic-measurement-and-recording-of-surgical-drain-output
#7
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...
January 13, 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
#8
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...
January 12, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28078906/arduino-based-noise-robust-online-heart-rate-detection
#9
Sangita Das, Saurabh Pal, Madhuchhanda Mitra
This paper introduces a noise robust real time heart rate detection system from electrocardiogram (ECG) data. An online data acquisition system is developed to collect ECG signals from human subjects. Heart rate is detected using window-based autocorrelation peak localisation technique. A low-cost Arduino UNO board is used to implement the complete automated process. The performance of the system is compared with PC-based heart rate detection technique. Accuracy of the system is validated through simulated noisy ECG data with various levels of signal to noise ratio (SNR)...
January 12, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28058862/publications-update
#10
Diane Crawford
No abstract text is available yet for this article.
January 6, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28058857/news-and-product-update
#11
(no author information available yet)
No abstract text is available yet for this article.
January 6, 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
#12
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/27924670/safety-of-iphone-retinal-photography
#13
Sheng Chiong Hong, Giles Wynn-Williams, Graham Wilson
BACKGROUND: With the advancement in mobile technology, smartphone retinal photography is becoming a popular practice. However, there is limited information about the safety of the latest smartphones used for retinal photography. AIMS: This study aims to determine the photobiological risk of iPhone 6 and iPhone 6 plus when used in conjunction with a 20Diopter condensing lens for retinal photography. METHOD: iPhone 6 and iPhone 6 plus (Apple, Cupertino, CA) were used in this study...
April 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/27919170/validation-of-the-fitbit-one-garmin-vivofit-and-jawbone-up-activity-tracker-in-estimation-of-energy-expenditure-during-treadmill-walking-and-running
#14
Kym Price, Stephen R Bird, Noel Lythgo, Isaac S Raj, Jason Y L Wong, Chris Lynch
OBJECTIVES: To determine the validity of energy expenditure estimation made by the Fitbit One, Garmin Vivofit and Jawbone UP activity trackers during treadmill walking and running. Determining validity of such trackers will inform the interpretation of the data they generate. DESIGN: Cross-sectional study. METHOD: Fourteen adults walked at 0.70, 1.25, 1.80 ms(-1) and ran at 2.22, 2.78, 3.33 ms(-1) on a treadmill wearing a Fitbit One, Garmin Vivofit and Jawbone UP...
April 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/27765003/determinants-in-the-number-of-staff-in-hospitals-maintenance-departments-a-multivariate-regression-analysis-approach
#15
Antonio Miguel Cruz, Mayra R Guarín
To date, there are no broadly accepted or accurate models to determine appropriate staffing [levels] for clinical engineering departments (CEDs). The purpose of this study is to determine what the determinants of the staffing levels are (total number of full time equivalents (FTEs)) in CEDs in healthcare organisations. In doing so, we used a cross-sectional exploratory approach by using a multivariate regression model over a secondary source of data information from the AAMI Benchmarking Solutions-Healthcare Technology Management database...
February 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/27715350/a-novel-compartmentalised-stent-graft-to-isolate-the-perfusion-of-the-abdominal-organs
#16
Yanfei Chen, Bryan W Tillman, Sung Kwon Cho, Tara D Richards, Amit D Tevar, Xinzhu Gu, William R Wagner, Youngjae Chun
Donation after cardiac death has been adopted to address the critical shortage of donor organs for transplant. Recovery of these organs is hindered by low blood flow that leads to permanent organ injury. We propose a novel approach to isolate the perfusion of the abdominal organs from the systemic malperfusion of the dying donor. We reasoned that this design could improve blood flow to organs without open surgery, while respecting the ethical principle that cardiac stress not be increased during organ recovery...
February 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/27701917/sensitivity-improvements-of-a-resonance-based-tactile-sensor
#17
Yoshinobu Murayama, Olof A Lindahl
Resonance-based contact-impedance measurement refers to the application of resonance sensors based on the measurement of the changes in the resonance curve of an ultrasonic resonator in contact with a surface. The advantage of the resonance sensor is that it is very sensitive to small changes in the contact impedance. A sensitive micro tactile sensor (MTS) was developed, which measured the elasticity of soft living tissues at the single-cell level. In the present paper, we studied the method of improving the touch and stiffness sensitivity of the MTS...
February 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/27696921/prenatal-identification-of-chd-murmur-using-four-segment-phonocardiographic-signal-analysis
#18
Jitendra Chourasia, Vijay Chourasia, A K Mittra
Congenital heart defects (CHD) are one of the utmost birth defects present in the neonatal after birth and a big challenge for the researchers to identify the structural abnormality during the antepartum period. An algorithm is presented here to identify the presence of CHD through foetal phonocardiographic (fPCG) signals. The recorded fPCG is decomposed using Daubechies4 wavelet with sub-level threshold to remove the noise in the signal. The Shannon energy is used to identify the different peaks of signals and then S1 and S2 according to the intervals between adjacent peaks...
February 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/27696920/stress-distribution-on-short-implants-with-different-designs-a-photoelastic-analysis
#19
Marcelo Coelho Goiato, Rodrigo Antonio de Medeiros, Mariana Vilela Sônego, Taynara Maria Toito de Lima, Aldiéris Alves Pesqueira, Daniela Micheline Dos Santos
Short dental implants have been used as an attempt to avoid bone grafts surgery, however there are few literature reports that evaluate changes to their design. Therefore, the aim of this study was to assess the effect of different short implant design on stress distribution through photoelastic analysis. Six external hexagon (5 × 5 mm) short dental implants with different design were used. Each group was treated with a single crown and a three element fixed partial dental prosthesis, resulting in a total of 12 photoelastic models...
February 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/27689916/a-novel-puborectalis-muscle-artificial-anal-sphincter-system-with-the-module-of-sensory-perception
#20
Hao Wu, Zhiwu Wang, Guozheng Yan, Wentian Jin, Shan Lu, Zerun Zhou
This article presents a novel puborectalis muscle artificial anal sphincter system (PM-AASS) with the module of sensory perception for treating severe faecal incontinence (FI). Due to the implantable feature of PM-AASS, this system applied low-power design and the total energy consumption could drop to 48.8 Ah/d. To reduce the injury of intestine and the pressure exerted on intestine, the actuator, including the structure of tings and the robot mechanism, of PM-AASS was presented and the middle ring was optimised...
February 2017: Journal of Medical Engineering & Technology
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