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[PMID]: 29506472
[Au] Autor:Yogendranathan N; Herath HMMTB; Jayamali WD; Matthias AT; Pallewatte A; Kulatunga A
[Ad] Address:National hospital, Colombo, Sri Lanka. ynilu6@gmail.com.
[Ti] Title:A case of anterior spinal cord syndrome in a patient with unruptured thoracic aortic aneurysm with a mural thrombus.
[So] Source:BMC Cardiovasc Disord;18(1):48, 2018 Mar 05.
[Is] ISSN:1471-2261
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:BACKGROUND: Spinal cord infarction is an uncommon condition. Anterior cord syndrome present with paraparesis or quadriparesis with sparing of vibration and proprioceptive senses. The common causes of anterior cord syndrome are aortic dissection and aortic surgical interventions. Spontaneous unruptured nondissected aortic aneurysms with intramural thrombus can rarely cause anterior cord infarctions. CASE PRESENTATION: We report a case of anterior spinal cord syndrome due to aneurysm of the thoracic aorta with a mural thrombus. A 64 year old male presented with sudden onset paraparesis with a sensory level at T1 with preserved sense of proprioception and vibration. The MRI panspine revealed increased T2 intensity in the anterior portion of the spinal cord from C5 to T10 level with characteristic 'owl eye' appearance on axial imaging. The CT aortogram detected aneurysmal dilatation of the ascending aortic, arch and descending thoracic aorta with significant intimal irregularities, calcified atherosclerotic plaques and a small mural thrombus. CONCLUSION: The possible mechanisms postulated are occlusion of ostia of radicular arteries by the atherosclerotic plaques and mural thrombus or thromboembolism to the anterior spinal artery. Nondissected atherosclerotic aortic aneurysms should be considered in patients presenting with spinal cord infarctions especially in the presence of vascular risk factors and smoking.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180311
[Lr] Last revision date:180311
[St] Status:In-Data-Review
[do] DOI:10.1186/s12872-018-0786-4

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[PMID]: 29524117
[Au] Autor:Ismail HM; Pretty CG; Signal MK; Haggers M; Chase JG
[Ad] Address:University of Canterbury, 20 Kirkwood Ave, Upper Riccarton, Christchurch, 8041, New Zealand. hina.ismail@pg.canterbury.ac.nz.
[Ti] Title:Finite element modelling and validation for breast cancer detection using digital image elasto-tomography.
[So] Source:Med Biol Eng Comput;, 2018 Mar 10.
[Is] ISSN:1741-0444
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Finite element (FE) models are increasingly used to validate experimental data in breast cancer. This research constructed a biomechanical FE model for breast shaped phantoms used to develop and validate a mechanical vibration based screening system. Such models do not currently exist but would enhance development of this screening technology. Three phantoms were modelled: healthy, with 10 and 20 mm inclusions. The overall goal was to create models with enough accuracy to replace experimental phantoms in providing data to optimize diagnostic algorithms for digital image-based elasto-tomography (DIET) screening technologies. FE model results were validating against experimental DIET phantom data for over 4000 collected points on each model and phantom using cross-correlation coefficients between experimental simulated data and direct comparison. Results showed good to strong correlation ranging from 0.7 to 1.0 in all cases with over 90% having a value over 0.9. Magnitudes for each frame of the dynamic response also matched well, indicating that the material properties and geometry were accurate enough to provide this level of correlation. These results justify the use of FE model generated data for in silico diagnostic algorithm development testing. The overall modelling and validation approach is not overly complex, and thus generalizable to similar problems using mechanical properties of silicone phantoms, and might be extensible to human cases with further work. Graphical abstract Validate that dynamic displacements show that the model can be used in place of phantoms for rapid development of diagnostic algorithms that use surface motion to detect underlying mechanical properties.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180310
[Lr] Last revision date:180310
[St] Status:Publisher
[do] DOI:10.1007/s11517-018-1804-5

  3 / 36915 MEDLINE  
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[PMID]: 29522443
[Au] Autor:Caggiano A
[Ad] Address:Fraunhofer Joint Laboratory of Excellence on Advanced Production Technology (Fh-J_LEAPT UniNaples), P.le Tecchio 80, 80125 Naples, Italy. alessandra.caggiano@unina.it.
[Ti] Title:Tool Wear Prediction in Ti-6Al-4V Machining through Multiple Sensor Monitoring and PCA Features Pattern Recognition.
[So] Source:Sensors (Basel);18(3), 2018 Mar 09.
[Is] ISSN:1424-8220
[Cp] Country of publication:Switzerland
[La] Language:eng
[Ab] Abstract:Machining of titanium alloys is characterised by extremely rapid tool wear due to the high cutting temperature and the strong adhesion at the tool-chip and tool-workpiece interface, caused by the low thermal conductivity and high chemical reactivity of Ti alloys. With the aim to monitor the tool conditions during dry turning of Ti-6Al-4V alloy, a machine learning procedure based on the acquisition and processing of cutting force, acoustic emission and vibration sensor signals during turning is implemented. A number of sensorial features are extracted from the acquired sensor signals in order to feed machine learning paradigms based on artificial neural networks. To reduce the large dimensionality of the sensorial features, an advanced feature extraction methodology based on Principal Component Analysis (PCA) is proposed. PCA allowed to identify a smaller number of features ( = 2 features), the principal component scores, obtained through linear projection of the original features into a new space with reduced dimensionality = 2, sufficient to describe the variance of the data. By feeding artificial neural networks with the PCA features, an accurate diagnosis of tool flank wear ( ) was achieved, with predicted values very close to the measured tool wear values.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[St] Status:In-Process

  4 / 36915 MEDLINE  
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[PMID]: 29522409
[Au] Autor:Romano M; Fratini A; Gargiulo GD; Cesarelli M; Iuppariello L; Bifulco P
[Ti] Title:On the Power Spectrum of Motor Unit Action Potential Trains Synchronized With Mechanical Vibration.
[So] Source:IEEE Trans Neural Syst Rehabil Eng;26(3):646-653, 2018 Mar.
[Is] ISSN:1558-0210
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:This study provides a definitive analysis of the spectrum of a motor unit action potential train (MUAPT) elicited by mechanical vibratory stimulation via a detailed and concise mathematical formulation. Experimental studies demonstrated that MUAPs are not exactly synchronized with the vibratory stimulus but show a variable latency jitter, whose effects have not been investigated yet. Synchronized action potential train was represented as a quasi-periodic sequence of a given MU waveform. The latency jitter of action potentials was modeled as a Gaussian stochastic process, in accordance to the previous experimental studies. A mathematical expression for power spectrum of a synchronized MUAPT has been derived. The spectrum comprises a significant continuous component and discrete components at the vibratory frequency and its harmonics. Their relevance is correlated to the level of synchronization: the weaker the synchronization the more relevant is the continuous spectrum. Electromyography (EMG) rectification enhances the discrete components. The derived equations have general validity and well describe the power spectrum of actual EMG recordings during vibratory stimulation. Results are obtained by appropriately setting the level of synchronization and vibration frequency. This paper definitively clarifies the nature of changes in spectrum of raw EMG recordings from muscles undergoing vibratory stimulation. Results confirm the need of motion artifact filtering for raw EMG recordings during stimulation and strongly suggest to avoid EMG rectification that significantly alters the spectrum characteristics.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[St] Status:In-Data-Review
[do] DOI:10.1109/TNSRE.2018.2803019

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[PMID]: 29522402
[Au] Autor:Katzschmann RK; Araki B; Rus D
[Ti] Title:Safe Local Navigation for Visually Impaired Users With a Time-of-Flight and Haptic Feedback Device.
[So] Source:IEEE Trans Neural Syst Rehabil Eng;26(3):583-593, 2018 Mar.
[Is] ISSN:1558-0210
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:This paper presents ALVU (Array of Lidars and Vibrotactile Units), a contactless, intuitive, hands-free, and discreet wearable device that allows visually impaired users to detect low- and high-hanging obstacles, as well as physical boundaries in their immediate environment. The solution allows for safe local navigation in both confined and open spaces by enabling the user to distinguish free space from obstacles. The device presented is composed of two parts: a sensor belt and a haptic strap. The sensor belt is an array of time-of-flight distance sensors worn around the front of a user's waist, and the pulses of infrared light provide reliable and accurate measurements of the distances between the user and surrounding obstacles or surfaces. The haptic strap communicates the measured distances through an array of vibratory motors worn around the user's upper abdomen, providing haptic feedback. The linear vibration motors are combined with a point-loaded pretensioned applicator to transmit isolated vibrations to the user. We validated the device's capability in an extensive user study entailing 162 trials with 12 blind users. Users wearing the device successfully walked through hallways, avoided obstacles, and detected staircases.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[St] Status:In-Data-Review
[do] DOI:10.1109/TNSRE.2018.2800665

  6 / 36915 MEDLINE  
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[PMID]: 29446583
[Au] Autor:Zaikova ZA; Burdukovskaya AV; Belykh AI
[Ti] Title:[Determination of priority unfavorable environmental factors].
[So] Source:Gig Sanit;95(12):1205-9, 2016.
[Is] ISSN:0016-9900
[Cp] Country of publication:Russia (Federation)
[La] Language:rus
[Ab] Abstract:In the Irkutsk region there are recorded high indices of rates of morbidity, disability, mortality rate of the working-age population and low levels of life expectancy of the population, that is confirmed by ranking position levels among the all subjects of the Russian Federation. According to all mentioned indices of health the region is inside the top ten unfavorable regions of Russia. In relation to the problem in the state of health of the adult population the estimation of the causal relationships between environmental factors and certain health indices is actual. The list of studiedfactors included health indices that characterize the harmful working conditions of the working population and basic socioeconomic indices in the region. Estimation of causal-relationship relationships was performed with the use of methods of multivariate analysis - correlation and multiple linear regression. In the selection offactors for the construction of mathematical models of multiple regression there were used methods of the analysis of variables variability, pair correlation coefficients matrix and sequential switching covariates to eliminate the problems of multicollinearity, pre-standardization of indices for the elevation of the numerical stability of regression analysis algorithm. As a result of the execution of the analysis there were constructed statistical models for the dependence in the system variables "environment - public health", which allowed to identify the most informative regression models for the adult population health according to indices of primary disability of the population, the mortality rate and life expectancy of the working age population. According to results of the analysis there were identified priority factors affecting on the health of the adult population of the Irkutsk region. To these factors there are referred the proportion of workplaces failing to meet sanitary standards for vibration and 8 socio-economic indices of living standards of the population.
[Mh] MeSH terms primary: Environmental Exposure
Occupational Health
Public Health
[Mh] MeSH terms secundary: Environmental Exposure/prevention & control
Environmental Exposure/statistics & numerical data
Humans
Life Expectancy
Mortality
Occupational Health/standards
Occupational Health/statistics & numerical data
Public Health/methods
Public Health/standards
Public Health/statistics & numerical data
Risk Factors
Siberia/epidemiology
Socioeconomic Factors
Statistics as Topic
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[Js] Journal subset:IM
[Da] Date of entry for processing:180216
[St] Status:MEDLINE

  7 / 36915 MEDLINE  
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[PMID]: 29446574
[Au] Autor:Rusanova DV; Kuleshova MV; Katamanova EV; Kartapoltseva NV; Pankov VA; Lakhman OL; Kazakova PV; Kuptsova NG
[Ti] Title:[Vibration disease: hygienic and medical aspects].
[So] Source:Gig Sanit;95(12):1180-3, 2016.
[Is] ISSN:0016-9900
[Cp] Country of publication:Russia (Federation)
[La] Language:rus
[Ab] Abstract:The hygienic assessment of working conditions of employees exposed to local vibration established that working conditions for employees ofvibration dangerous occupations at the aircraft plant according to the degree from a health standpoint and hazard are referred to the fourth (dangerous) class of the degree of danger that stipulates stable high levels of the morbidity rate. The leading factor is a local vibration that results in the consistently high levels of occupational morbidity rate. There was shown the efficiency of the use of the pulsed magnetic stimulation in the treatment ofpatients with vibration disease associated with the exposure to local vibration. For the evaluation of the effectiveness of treatment in patients the condition of the central nervous system was determined with the use of computer electroencephalography with the registration of visual and auditory evoked potentials and somatosensory evoked potentials; there was studied the state of the peripheral nerves in arms and legs relying upom electromyographic data; there was performed psychological study. After the performance of pulse magnetic stimulation in patients diagnosed to have the vibration diseases there were observed the improvement in the interaction of cortical-subcortical structures and associative areas of the frontal and temporal lobes of the brain. After treatment there was noted the shortening of the time of the conduction of the afferent wave of the excitation at the level of the cervical spinal cord, subcortical structures and the central conduction time. There was restored previously reduced the speed of the conduction of the impulse via the distal parts of the tibial and median nerve, through the ulnar nerve in the area of the elbow joint. There was noted the rise in the average temperature on the hands; the decline of thresholds of vibration and pain sensitivity; the improvement of indices characterizing of the state of mnestic- attentional and psycho-emotional scope of activity.
[Mh] MeSH terms primary: Aircraft
Hand-Arm Vibration Syndrome
Transcranial Magnetic Stimulation/methods
Vibration/adverse effects
[Mh] MeSH terms secundary: Adult
Cortical Excitability
Electroencephalography/methods
Hand-Arm Vibration Syndrome/diagnosis
Hand-Arm Vibration Syndrome/etiology
Hand-Arm Vibration Syndrome/therapy
Humans
Industry/methods
Male
Middle Aged
Occupational Exposure/adverse effects
Occupational Exposure/analysis
Occupational Exposure/prevention & control
Treatment Outcome
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[Js] Journal subset:IM
[Da] Date of entry for processing:180216
[St] Status:MEDLINE

  8 / 36915 MEDLINE  
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[PMID]: 29446289
[Au] Autor:Sudeikina NA; Kurenkova GV; Lemeshevskaya EP
[Ti] Title:[The impact of harmful occupational factors on the morbidity rate of workers of the railway-car repair plant].
[So] Source:Gig Sanit;95(12):1150-4, 2016.
[Is] ISSN:0016-9900
[Cp] Country of publication:Russia (Federation)
[La] Language:rus
[Ab] Abstract:The rail transport is the one of the leading sectors of the national economy. More than 50% of the employees of the enterprises of the railway complex work under the unfavourable impact of hazardous and dangerous substances and occupational factors. In the literature issues of working conditions and health of employees of railway carrepairing plant are hardly highlighted. The aim of the study is the evaluation of the morbidity rate shaped under the influence of harmful occupational factors for the elaboration of preventive measures. In the work there were used generally accepted methods of hygienic studies, analysis of morbidity rate with temporary disability (TD), according to records of periodic medical examinations, occupational prevalence. The railway car-repairing plant was established to be characterized by the complex of harmful factors of the working environment and labor process: noise, local vibration, industrial aerosols of complex composition, chemicals, low light, hardness of the labor process. The levels of incidence with temporal disability in the studied groups, depending on the work seniority in the harmful labor conditions, significantly decrease with the experience from 5 to 9 years and increase with the experience more than 10 years. Executed in-depth analysis as of the both morbidity rate and TD, as well results of periodic medical examinations of workers of main shops shows that overall indices of the morbidity rate and TD are significantly higher than in the comparison group; levels of the morbidity rate and TD in the observed groups significantly decline depending on the length of service in hazardous working conditions with a length of the experience offrom 5 to 9 years and increase with the increase in the length of experience of 10 years or more. In the structure of morbidity and TD leading positions are occupied by diseases of the respiratory system, musculoskeletal system and connective tissue, circulatory system and digestive system, diseases of the eye and its appendages. The health damage risk coefficients in the studied groups of workers and the average losses of working time due to the morbidity with TD per 1 employee in all shops are higher than those in the comparison group. The level of the occupational morbidity rate is very low. Harmful working conditions contribute to the development of general and occupationally related diseases.
[Mh] MeSH terms primary: Industry
Occupational Diseases
Railroads
[Mh] MeSH terms secundary: Humans
Incidence
Industry/methods
Industry/standards
Industry/statistics & numerical data
Occupational Diseases/epidemiology
Occupational Diseases/etiology
Occupational Diseases/prevention & control
Occupational Exposure/adverse effects
Occupational Exposure/analysis
Occupational Exposure/prevention & control
Railroads/instrumentation
Railroads/methods
Risk Assessment/methods
Risk Assessment/standards
Risk Factors
Siberia/epidemiology
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[Js] Journal subset:IM
[Da] Date of entry for processing:180216
[St] Status:MEDLINE

  9 / 36915 MEDLINE  
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[PMID]: 29446286
[Au] Autor:Kurenkova GV; Lemeshevskaya EP
[Ti] Title:[Formation of working conditions and the problems of hygienic assessment of industrial environmental factors in railway tunnels].
[So] Source:Gig Sanit;95(12):1145-9, 2016.
[Is] ISSN:0016-9900
[Cp] Country of publication:Russia (Federation)
[La] Language:rus
[Ab] Abstract:Tunnels are an integral part of the ways and artificial constructions of the railway. Objective assessment of working conditions is important, because current regulations fail to allow to give a definite hygienic assessment of some factors of the production environment of the tunnels. Objective: to reveal the peculiarities of the formation of working conditions in railway tunnels with the subsequent hygienic assessment for the development of preventive measures. Measurement of the factors of working process and working environment is carried out with the use of the certified equipment for the approved the hygienic and sanitary-chemical methods in workplaces in tunnels of the East-Siberian railway. Specific conditions were shown to be formed due to constructive solutions, climate and geographical location, the length of railway tunnels, the composition of the rocks through which the tunnel, the nature of the maintenance tunnels, ventilation system, repetition rate and type of passing rolling stock. All employees from occupational groups from examined tunnels were established to be exposed to high concentrations of aerosols with predominantly fibrogenic action, noise levels, adverse climate (low positive and negative temperatures, high relative humidity and mobility of air), the lack of natural lighting, low levels of artificial light, hard exertion of labor (dynamic physical load, working position, the slopes of the body, movement in space). Additionally, high levels of the vibration, nonionizing and ionizing radiation were typical for jobs of the Baikal and the North-Muya tunnel. There is proposed the algorithm of hygienic assessment of the microclimate, light environment at the working places depending on the time of the works in the underground conditions and constructional features of tunnels, methods of accounting personnel dose rates from natural sources.
[Mh] MeSH terms primary: Occupational Exposure
Railroads
Risk Assessment
Workplace
[Mh] MeSH terms secundary: Humans
Occupational Exposure/adverse effects
Occupational Exposure/analysis
Occupational Exposure/prevention & control
Occupational Exposure/standards
Public Health/methods
Railroads/methods
Railroads/standards
Risk Assessment/methods
Risk Assessment/standards
Risk Factors
Siberia/epidemiology
Workplace/organization & administration
Workplace/standards
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[Js] Journal subset:IM
[Da] Date of entry for processing:180216
[St] Status:MEDLINE

  10 / 36915 MEDLINE  
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[PMID]: 29446278
[Au] Autor:Alikbayeva LA; Iakubova IS; Ryzhkov AL; Lavrinova AA; Sidorov AA
[Ti] Title:[Hygienic assessment of conditions of the exploitation of facilities of the urban drainage system].
[So] Source:Gig Sanit;95(12):1121-4, 2016.
[Is] ISSN:0016-9900
[Cp] Country of publication:Russia (Federation)
[La] Language:rus
[Ab] Abstract:The aim of the study was the hygienic characteristics of the location of sewage pumping stations (SPSs) in the residential area of the city and the assessment of working conditions for the staff. The features of the technological process at the SPSs resulted in the formation of specific working conditions characterized by the presence of a cooling microclimate, noise production, technological vibration, air pollution by microorganisms. The assessment of working conditions has allowed to refer them to the 3 class (harmful working conditions) of the 2 and 3 degree. Preventive measures for SPSs should include the use of equipment for cleaning the air of working zone, having a combined odourremoving and microbicidal action; the automation of the labor process; the installation of additional equipment for filtering air circulating in workplaces and emitting into the atmosphere; provision of sealing equipment with the use of noise insulating materials.
[Mh] MeSH terms primary: Air Pollutants, Occupational/analysis
Noise/prevention & control
Occupational Exposure
Sewage
Waste Disposal, Fluid
[Mh] MeSH terms secundary: Humans
Occupational Exposure/analysis
Occupational Exposure/prevention & control
Occupational Health/standards
Russia
Sewage/analysis
Sewage/statistics & numerical data
Waste Disposal, Fluid/methods
Waste Disposal, Fluid/standards
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (Air Pollutants, Occupational); 0 (Sewage)
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[Js] Journal subset:IM
[Da] Date of entry for processing:180216
[St] Status:MEDLINE


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