2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE)最新文献_第2页

Effects of Conditioned Media from Cell Cultures Stimulated with LIPUS on the Viability of Retinal Neurons and Müller Glia LIPUS刺激细胞培养条件培养基对视网膜神经元和神经胶质细胞活力的影响

2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE) Pub Date : 2022-03-21 DOI: 10.1109/GMEPE/PAHCE55115.2022.9757778

I. Poblete-Naredo, L. Leija, A. Vera, J. Gutiérrez-Martínez, A. Albores, M. Gutiérrez

{"title":"Effects of Conditioned Media from Cell Cultures Stimulated with LIPUS on the Viability of Retinal Neurons and Müller Glia","authors":"I. Poblete-Naredo, L. Leija, A. Vera, J. Gutiérrez-Martínez, A. Albores, M. Gutiérrez","doi":"10.1109/GMEPE/PAHCE55115.2022.9757778","DOIUrl":"https://doi.org/10.1109/GMEPE/PAHCE55115.2022.9757778","url":null,"abstract":"The use of low intensity pulsed ultrasound (LIPUS) has been increased in recent years because of its potential to produce a variety of significant effects. Results under different conditions have indicated that it can be used either to provoke cells death or to produce tissue regeneration. In accordance with research in other systems, as the brain, LIPUS could be proposed for ophthalmic applications, e.g. to prevent retinal damage, to improve drug delivery, to dissolve blood clots or sonothrombolysis, among others. In this paper, a study of cell viability of retinal neurons and Müller glia treated with LIPUS is presented. This viability is analogized between direct LIPUS treatments and the case when using conditioned media of LIPUS treated cells. LIPUS was applied at 10% and 20% duty factors by using a commercial ultrasound transducer with an adjustable signal generator. Total acoustic intensity at the culture well was measured and compared with the free- field condition. Results indicate an increase in Müller glia viability when using conditioned media from LIPUS pretreated retinal neurons. Using LIPUS to directly treat the cells provokes a small increase in viability without statistical significance.","PeriodicalId":197762,"journal":{"name":"2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE)","volume":"11 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126168321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Papers Index 论文索引

2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE) Pub Date : 2022-03-21 DOI: 10.1109/gmepe/pahce55115.2022.9757799

引用次数: 0

A Mechanical Power Calculation for Different Kicks in Taekwondo Elite Athletes from Mexico City 墨西哥城跆拳道精英运动员不同踢法的机械力量计算

2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE) Pub Date : 2022-03-21 DOI: 10.1109/GMEPE/PAHCE55115.2022.9757769

K. C. Moreno-Mc.-Manus, I. Quiñones-Urióstegui, V. Bueyes-Roiz, L. Anaya-Campos, P. Velasco-Acosta, F. Figueroa-Cavero, D. Mirabent-Amor, G. Vega-Martínez, J. G. Franco Sánchez

{"title":"A Mechanical Power Calculation for Different Kicks in Taekwondo Elite Athletes from Mexico City","authors":"K. C. Moreno-Mc.-Manus, I. Quiñones-Urióstegui, V. Bueyes-Roiz, L. Anaya-Campos, P. Velasco-Acosta, F. Figueroa-Cavero, D. Mirabent-Amor, G. Vega-Martínez, J. G. Franco Sánchez","doi":"10.1109/GMEPE/PAHCE55115.2022.9757769","DOIUrl":"https://doi.org/10.1109/GMEPE/PAHCE55115.2022.9757769","url":null,"abstract":"Taekwondo is a combat sport which mostly uses kicks to score points in combat settings. Athletes need to perform kicks with the optimal velocity and force; hence, mechanical power is a variable that uses both and could give an insight to subjects lower leg power. The objective is to calculate mechanical power from biomechanical parameters obtain in different kicks. We measure five elite subjects with an age range between 17 and 20 years old, we used AMTI force plates and Vicon photogrammetry system to measure the kicks given to a PunchSensor placed in a structure. Data was processed in Nexus, Visual3D and MATLAB in order to obtain mechanical power using P=F*v. Results show that lateral kicks are the ones that generate higher power (11500.11 W), followed by the frontal (4052.39 W) and finally the descendent (3061.56 W), also we notice that the height of the kick influence in the mechanical power generated (i.e., 4594.30 W frontal kick to the torso, 3510.48 W frontal kick to head); finally, to the lateral (1639.02 W lateral kick with right leg, 1506.71 lateral kick with left leg) and descendent kicks the laterality of the leg also influence on the mechanical power generated.","PeriodicalId":197762,"journal":{"name":"2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116999983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Machine Learning-Based Approaches to Predict Adherence to Continuous Positive Airway Pressure (CPAP) in Patients with Obstructive Sleep Apnea (OSA) 基于机器学习的方法预测阻塞性睡眠呼吸暂停(OSA)患者持续气道正压通气(CPAP)的依从性

2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE) Pub Date : 2022-03-21 DOI: 10.1109/GMEPE/PAHCE55115.2022.9757802

J. Villanueva, M. Lemus, Luis García, José Escorcia-Gutierrez, Gisella Borja

{"title":"Machine Learning-Based Approaches to Predict Adherence to Continuous Positive Airway Pressure (CPAP) in Patients with Obstructive Sleep Apnea (OSA)","authors":"J. Villanueva, M. Lemus, Luis García, José Escorcia-Gutierrez, Gisella Borja","doi":"10.1109/GMEPE/PAHCE55115.2022.9757802","DOIUrl":"https://doi.org/10.1109/GMEPE/PAHCE55115.2022.9757802","url":null,"abstract":"Patients who have been diagnosed with OSA are mainly treated with CPAP treatment. Although CPAP is considered an effective therapy for OSA patients, it is poorly tolerated and often not accepted in a large OSA patient group, limiting its overall effectiveness [1]. Unfortunately, there is an evident lack of clinical screening tools to support the early prediction of adherence to treatment in patients with OSA and help medical staff in decision-making concerning the real needs of the patients. Therefore, this study presents a methodology to identify potential features associated with the adherence to CPAP treatment using features selection methods and the development and evaluation of different machine learning models to predict CPAP therapy adherent patients. We identified different patterns of 24-hours diastolic blood pressure, daytime systolic pressure, arousal index, uric acid test and triglycerides as the relevant factors correlated with the adherence to CPAP treatment. We developed and evaluated machine learning-based models to predict CPAP treatment adherence. The best-performing model was a artificial neural network (ANN) with AUC 0.84 (95%CI: 0.72 - 0.87). The identification of potential predictors and validation of machine learning-based approaches may be helpful to identify subjects poorly adherent to therapy.","PeriodicalId":197762,"journal":{"name":"2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE)","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114196493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Binaural sound stimulation at pink noise frequencies to reduce sleep consolidation time and its effects on bispectral index (BIS) 粉红噪声频率双耳刺激缩短睡眠巩固时间及其对双谱指数的影响

2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE) Pub Date : 2022-03-21 DOI: 10.1109/GMEPE/PAHCE55115.2022.9757734

A. E. Medellín-Serafín, F. Moumtadi

{"title":"Binaural sound stimulation at pink noise frequencies to reduce sleep consolidation time and its effects on bispectral index (BIS)","authors":"A. E. Medellín-Serafín, F. Moumtadi","doi":"10.1109/GMEPE/PAHCE55115.2022.9757734","DOIUrl":"https://doi.org/10.1109/GMEPE/PAHCE55115.2022.9757734","url":null,"abstract":"Binaural sound is a type of sound that allows you to experience a spatial and three-dimensional auditory sensation and, in recent research, has been used as an alternative to drugs to induce a state of relaxation, including sleep itself in several experiments with promising results and with no adverse effects. Pink noise, on the other hand, is a special class of white noise in which the power per unit bandwidth is higher in the audio spectrum. Typically generated in the audible spectrum between 20Hz and 20kHz, rain, the sound of a fan, a waterfall, or the sound experienced in a moving car all have pink noise frequencies, so it becomes clear why some people go into a state of relaxation or sleep when listening to these sounds. This work presents the design of an auditory stimulation system that combines binaural technology and sound at pink noise frequencies to induce a state of sleep and its effects on the bispectral index (BIS) that is used to determine the level of sedation in patients at the time of undergoing a surgical procedure and that allows, in the same way, to know the level of sleep in which the person is. For this research, an algorithm was developed that combines binaural sound and pink noise and the experiment was carried out on 12 volunteer nurses with night shifts who were subjected to different auditory stimulations (without sound, with pink noise, with binaural sound, and with binaural sound at pink noise frequencies) finding that the combination has greater relaxing effects than each stimulus separately, this under controlled conditions and with volunteers without disturbing any sleep.","PeriodicalId":197762,"journal":{"name":"2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124292946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computer System for the Analysis of Cardiac Contraction Synchrony 心脏收缩同步化分析的计算机系统

2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE) Pub Date : 2022-03-21 DOI: 10.1109/GMEPE/PAHCE55115.2022.9757763

M. P. León Herrera, L. Jiménez-Ángeles, E. Vallejo, R. Valdés-Cristerna, E. Bojorges Valdez

{"title":"Computer System for the Analysis of Cardiac Contraction Synchrony","authors":"M. P. León Herrera, L. Jiménez-Ángeles, E. Vallejo, R. Valdés-Cristerna, E. Bojorges Valdez","doi":"10.1109/GMEPE/PAHCE55115.2022.9757763","DOIUrl":"https://doi.org/10.1109/GMEPE/PAHCE55115.2022.9757763","url":null,"abstract":"The aim of this project is to develop a computerized system, called VentriQuant, for the quantitative assessment of cardiac dyssynchrony (CDS). Impaired CDS is one of the main clinical indicators of the evolution of heart failure (HF) syndrome, considered the leading cause of death worldwide. The VentriQuant system incorporates quantification methods that have already been validated and used in the clinic, but also aims to incorporate new algorithms and indices in order to expand its use and evaluate its clinical utility. The VentriQuant system is expected to provide support by expanding access to cardiovascular imaging specialists to new tools and methods of analysis, and to generate the possibility of remote diagnosis and increased reproducibility in quantitative and objective assessment, with a direct impact on better diagnosis and follow-up of HF patients. The VentriQuant system is easy to use, its operation is simple and intuitive, and it displays important information for the evaluation of the contraction synchrony of both ventricles.","PeriodicalId":197762,"journal":{"name":"2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125269978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a Multifunctional Low-Cost Hand Prosthesis 一种多功能低成本假肢的设计

2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE) Pub Date : 2022-03-21 DOI: 10.1109/GMEPE/PAHCE55115.2022.9757757

G. Borja, E. De Los Ríos, M. Dominguez, J. Fábregas, J. Ledesma, D. Barrios

{"title":"Design of a Multifunctional Low-Cost Hand Prosthesis","authors":"G. Borja, E. De Los Ríos, M. Dominguez, J. Fábregas, J. Ledesma, D. Barrios","doi":"10.1109/GMEPE/PAHCE55115.2022.9757757","DOIUrl":"https://doi.org/10.1109/GMEPE/PAHCE55115.2022.9757757","url":null,"abstract":"The following project leads us to study and materialize the creation of an electromyograph implemented in a prosthesis for low-income people and their limitations with the need to improve their quality of life, for which a hand prosthesis was implemented, which allows to the upper extremity it performs several movements and that clearly constitute a limitation in the absence of it. The prosthesis consists of a mechanical part that is identified by the construction of the hand, motors and pulley system; an electronic part characterized by the EMG signal acquisition and conditioning system that includes the amplification and filtering stage; and the control system which consists of H-bridges so that the motors rotate in both directions, resistive sensors to generate the proper pressure of the hand, angular position sensors that are the ones that check the angle at which the fingers are located and an Arduino UNO that receives the signal, processes it, controls the position of the fingers and the pressure they exert on objects, controls the speed of the motors, the ignition time and which activate in their different movements. EMG signals were displayed in a user interface, developed in a high-level language such as LabVIEW, allowing digital processing of the action potentials of forearm muscles for analysis. A reliable EMG signal was obtained from the conditioning stage, which allowed threshold levels for finger activation to be established.","PeriodicalId":197762,"journal":{"name":"2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127997266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling and Cross-Correlation Analysis of Two Sets of Ideal Ultrasonic Signals for Non-invasive Temperature Estimation in Ablation Temperatures 两组理想超声信号的无创消融温度估计建模及相互关系分析

2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE) Pub Date : 2022-03-21 DOI: 10.1109/GMEPE/PAHCE55115.2022.9757733

F. Cortes, A. Vera, L. Leija, R. Ortega-Palacios, A. Ramos, I. Bazán

{"title":"Modelling and Cross-Correlation Analysis of Two Sets of Ideal Ultrasonic Signals for Non-invasive Temperature Estimation in Ablation Temperatures","authors":"F. Cortes, A. Vera, L. Leija, R. Ortega-Palacios, A. Ramos, I. Bazán","doi":"10.1109/GMEPE/PAHCE55115.2022.9757733","DOIUrl":"https://doi.org/10.1109/GMEPE/PAHCE55115.2022.9757733","url":null,"abstract":"Hyperthermia (40-45 °C) and ablation (≥60°C) have become a common treatment procedure for cancerous tumors. At the present time, there is no easily affordable and robust instrument for noninvasive estimation of temperature changes. Ultrasound is one of the most feasible alternatives for non-invasive temperature change estimation during thermotherapy due to its simplicity of processing, tissue penetration capability, relative low cost, and its non-invasive and non-ionizing nature, suggesting a promising prospective of this technique to be used in clinical therapy. A temporal analysis is presented comparing the time delays suffered by two sets of ideal signals generated using a theoretical mathematical description. The cross- correlation method was used to calculate the time lags of the signals as they pass through a medium containing scatterers with temperature increments. The linear regressions conducted for all the four data windows in which the two sets of signals were divided show a linear and growing behavior, which implies that the higher the temperature, the greater the time delay between the signals of the same window.","PeriodicalId":197762,"journal":{"name":"2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114941993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Model Predictive Control and Moving Horizon Estimation for the Development of Closed-Loop Inhaled Anesthetics Administration 模型预测控制和运动水平估计在闭环吸入麻醉剂给药系统开发中的应用

2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE) Pub Date : 2022-03-21 DOI: 10.1109/GMEPE/PAHCE55115.2022.9757783

F. Sánchez, A. M. Hernández

引用次数: 1

[GMEPE/PAHCE 2022 Front cover]

2022 Global Medical Engineering Physics Exchanges/ Pan American Health Care Exchanges (GMEPE/PAHCE) Pub Date : 2022-03-21 DOI: 10.1109/gmepe/pahce55115.2022.9757787

引用次数: 0