journal
MENU ▼
Read by QxMD icon Read
search

Journal of Medical Engineering & Technology

journal
https://www.readbyqxmd.com/read/28447865/a-versatile-stretch-sensor-for-measuring-physiological-movement-using-a-centre-loaded-end-supported-load-cell
#1
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...
April 27, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28447862/high-reliability-microcontroller-nerve-stimulator-for-assistance-in-regional-anaesthesia-procedures
#2
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...
April 27, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28447860/remote-sensing-of-physiological-signs-using-a-machine-vision-system
#3
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...
April 27, 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
#4
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...
April 13, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28394662/validation-of-an-ambient-measurement-system-ams-for-walking-speed
#5
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)...
April 10, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28351231/utilization-of-second-derivative-photoplethysmographic-features-for-myocardial-infarction-classification
#6
Nurhafizah Mahri, Kok Beng Gan, Rusna Meswari, Mohd Hasni Jaafar, Mohd Alauddin Mohd Ali
Myocardial infarction (MI) is a common disease that causes morbidity and mortality. The current tools for diagnosing this disease are improving, but still have some limitations. This study utilised the second derivative of photoplethysmography (SDPPG) features to distinguish MI patients from healthy control subjects. The features include amplitude-derived SDPPG features (pulse height, ratio, jerk) and interval-derived SDPPG features (intervals and relative crest time (RCT)). We evaluated 32 MI patients at Pusat Perubatan Universiti Kebangsaan Malaysia and 32 control subjects (all ages 37-87 years)...
March 29, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28351224/dynamic-finite-element-simulation-of-dental-prostheses-during-chewing-using-muscle-equivalent-force-and-trajectory-approaches
#7
Reza Razaghi, Hasan Biglari, Alireza Karimi
The long-term application of dental prostheses inside the bone has a narrow relation to its biomechanical performance. Chewing is the most complicated function of a dental implant as it implements different forces to the implant at various directions. Therefore, a suitable holistic modelling of the jaw bone, implant, food, muscles, and their forces would be deemed significant to figure out the durability as well as functionality of a dental implant while chewing. So far, two approaches have been proposed to employ the muscle forces into the Finite Element (FE) models, i...
March 29, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28351185/biomechanical-evaluation-of-spring-system-for-implant-supported-prosthesis-analysis-by-photoelasticity-and-extensometry
#8
Marcelo Coelho Goiato, Rodrigo Antonio de Medeiros, Emily Vivianne Freitas da Silva, Mariana Vilela Sônego, Daniela Micheline Dos Santos
New systems are released in the odontological market with the objective of bringing improvements and advancements in the clinical success of implants and implant-supported prostheses. The distribution of tension for the bone/implant system of these new systems is important. The purpose of this work was to evaluate, by photoelastic analysis and strain gauges, the distribution of tension for the bone/implant system, using the Slim system. A photoelastic cast with an external hexagon implant was manufactured and a metal prosthesis was screwed below it, with or without the tested system...
March 29, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28301285/wireless-power-transfer-for-a-pacemaker-application
#9
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
#10
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
#11
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/28398152/multichannel-intra-luminal-impedance-signals-variability-during-gastro-oesophageal-activities
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
journal
journal
26983
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"