Mostrando ítems 27-38 de 38

Large-Range Polymer Optical-Fiber Strain-Gauge Sensor for Elastic Tendons in Wearable Assistive Robots

Cifuentes Garcia, Carlos Andrés; Casas, Jonathan; Leal-Junior, Arnaldo; Díaz, Camilo R.; Frizera, Anselmo; Múnera, Marcela (MDIPSuiza, 2019)

This paper presents the development and validation of a polymer optical-fiber strain-gauge sensor based on the light-coupling principle to measure axial deformation of elastic tendons incorporated in soft actuators for ...
Multimodal Human–Robot Interaction for Walker-Assisted Gait

Cifuentes, Carlos A.; Rodríguez, Camilo; Frizera Neto, Anselmo; Bastos Filho, Teodiano Freire; Carelli, Ricardo (Institute of Electrical and Electronics Engineers Inc.Estados Unidos, 2016)

Human mobility is affected by different types of pathologies and also decreases gradually with age. In this context, Smart Walkers may offer important benefits for human assisted-gait in rehabilitation and functional ...
Segmentation of retinal fluids and hyperreflective foci using deep learning approach in optical coherence tomography scans

Gonzalez Osorio, Fabio; Perdomo Charry, Oscar Julian; Sanchez, Yeison D.; Nieto, Bernardo; Padilla, Fabio D. (SPIEEstados Unidos, 2020)

Retinal diseases are a common cause of blindness around the world, early detection of clinical findings can help to avoid vision loss in patients. Optical coherence tomography images have been widely used to diagnose retinal ...
Sleep apnea: Tracking effects of a first session of CPAP therapy by means of Granger causality

Orjuela Cañón, Alvaro D.; Cerquera, Alexander; Freund, Jan A.; Serdá, Gabriel; Ravelo García, Antonio G. (ElsevierIreland, 2020)

Connectivity between physiological networks is an issue of particular importance for understanding the complex interaction brain-heart. In the present study, this interaction was analyzed in polysomnography recordings of ...
Smart homes and home health monitoring technologies for older adults: A systematic review

Liu, Lili; Stroulia, Eleni; Nikolaidis, Ioanis; Cruz, Antonio Miguel; Rios Rincon, Adriana (Elsevier Ireland LtdBrasil, 2016)

The aim of this paper was to conduct a systematic literature review to determine: (1) the levels of technology readiness among older adults and, (2) evidence for smart homes and home-based health-monitoring technologies ...
SOPHIA: System for Ophthalmic Image Acquisition, Transmission, and Intelligent Analysis

González Osorio, Fabio Augusto; Perdomo Charry, Oscar Julián; Perez Perez, Andrés Daniel; Ríos Calixto, Hernán Andrés; Pava Rodríguez, Melissa de la; Arias-Vanegas;, Víctor Alfonso; Lara Ramírez, Juan Sebastián; Toledo Cortés, Santiago; Camargo Mendoza, Jorge Eliecer; Rodríguez Alvira, Francisco José (Universidad de AntioquiaColombia, Antioquia, 2020)

Ocular diseases are one of the main causes of irreversible disability in people in productive age. In 2020, approximately 18% of the worldwide population was estimated to suffer of diabetic retinopathy and diabetic macular ...
Teaching maintenance of medical devices in simulation centers: a pilot study

Quiroga Torres, Daniel Alejandro; Presiga, Ana Maria; Flórez Luna, Nestor; Cruz, Antonio Miguel (Springer VerlagAlemania, 2016)

This paper aims to measure what the students’ perceived learning outcome achievements are after finishing medical devices courses I and II. This is a pre- post-test with no control group study design. Twenty-four students ...
The state of knowledge on technologies and their use for fall detection: A scoping review

Cruz, Antonio miguel; Rios Rincon, Adriana Maria; Lili, Liu; Lapierre, Nolween; Neubauer, Noelanahh; Rousseau, Jacqueline (ElsevierColombia, 2018)

Globally, populations are aging with increasing life spans. The normal aging process and the resulting disabilities increase fall risks. Falls are an important cause of injury, loss of independence and institutionalization. ...
Transmission of whole body vibration to the lower body in static and dynamic half-squat exercises

Munera Ramirez, Marcela Cristina; Chiementin, Xavier; Bertucci, William; Duc, Sebastien (Taylor and Francis Ltd.Inglaterra, 2016)

Whole body vibration (WBV) is used as a training method but its physical risk is not yet clear. Hence, the aim of this study is to assess the exposure to WBV by a measure of acceleration at the lower limb under dynamic and ...
Users' Attitudes Towards Personal Health Records: A Cross-Sectional Pilot Study

Khaneghah, Peyman Azad; Cruz, Antonio Miguel; Bentley, Pamela; Liu, Lili; Stroulia, Eleni; Ferguson-Pell, Martin (Georg Thieme VerlagBrasil, 2016)

Background: Prevention and management of chronic conditions is a priority for many healthcare systems. Personal health records have been suggested to facilitate implementation of chronic care programs. However, patients’ ...
What does the literature say about using electronic pillboxes for older adults? A systematic literature review

Cruz , Antonio Miguel; Aya Parra, Pedro Antonio; Bóhorquez, Andrés Felipe (Informa HealthcareColombia, 2018)

Clinical studies used commercially well-established electronic pillboxes with a high TRL. New electronic pillboxes in development had a low TRL. The discovered outcome was mainly adherence to medication. The overall mean ...
What does the literature say about using robots on children with disabilities?

Cruz, Antonio Miguel; Rios Rincon, Adriana María; Rodriguez Dueñas, William Ricardo; Quiroga Torres, Daniel Alejandro; Bohórquez Heredia, Andrés Felipe (Taylor and Francis Ltd.Reino Unido, 2017)

The purpose of this study is to examine the extent and type of robots used for the rehabilitation and education of children and young people with CP and ASD and the associated outcomes.

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Large-Range Polymer Optical-Fiber Strain-Gauge Sensor for Elastic Tendons in Wearable Assistive Robots
...
Cifuentes Garcia, Carlos Andrés | 2019

This paper presents the development and validation of a polymer optical-fiber strain-gauge sensor based on the light-coupling principle to measure axial deformation of elastic tendons incorporated in soft actuators for wearable assistive robots. An analytical model was proposed and further validated with experiment tests, showing correlation with a coefficient of R = 0.998 between experiment and theoretical data, and reaching a maximum axial displacement range of 15 mm and no significant hysteresis. Furthermore, experiment tests were carried out attaching the validated sensor to the elastic tendon. Results of three experiment tests show the sensor’s capability to measure the tendon’s response under tensile axial stress, finding 20.45% of hysteresis in the material’s response between the stretching and recovery phase. Based on these results, there is evidence of the potential that the fiber-optical strain sensor presents for future applications in the characterization of such tendons and identification of dynamic models that allow the understanding of the material’s response to the development of more efficient interaction-control strategies.

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Multimodal Human–Robot Interaction for Walker-Assisted Gait
...
Cifuentes, Carlos A. | 2016

Human mobility is affected by different types of pathologies and also decreases gradually with age. In this context, Smart Walkers may offer important benefits for human assisted-gait in rehabilitation and functional compensation scenarios. This paper proposes a new interaction strategy for human-walker cooperation. The presented strategy is based on the acquisition of human gait parameters by means of data fusion from inertial measurement units and a laser range finder. This paper includes the mathematical formulation of the controller, simulations, and practical experimentation of the interaction strategy, in order to show the performance of the control system, including the parameter detection methodology. In the experimental study, despite the continuous oscillation during the walking, the parameter estimation was suitable for assisted ambulation, showing an appropriate adaptive behavior with changes in human linear velocity. Finally, the controller keeps the walker continuously following in front of the human gait, and it is shown how the walker orientation follows the human orientation during the real experiments.

LEER
Segmentation of retinal fluids and hyperreflective foci using deep learning approach in optical coherence tomography scans
...
Gonzalez Osorio, Fabio | 2020

Retinal diseases are a common cause of blindness around the world, early detection of clinical findings can help to avoid vision loss in patients. Optical coherence tomography images have been widely used to diagnose retinal diseases, due to the capacity to show in detail findings as drusen, hyperreflective foci, and intraretinal and subretinal fluids. The location of findings is vital to identify and follow-up the retinal disease. However, the detection and segmentation of these findings is not an easy task due to artifacts noise, and the time consuming even to experts ophthalmologist. This paper proposes a computational method based on deep learning to automatically identify fluids and hyperreflective foci as a tool to identify retinal diseases through the use of OCT images. The method was evaluated on a set of OCT images manually annotated by experts. The experimental results present a Dice coefficient of 0,4437 and 0,6245 in the segmentation task of fluids (intrarretinal fluids and subretinal fluids), and hyperreflective foci respectively.

LEER
Sleep apnea: Tracking effects of a first session of CPAP therapy by means of Granger causality
...
Orjuela Cañón, Alvaro D. | 2020

Connectivity between physiological networks is an issue of particular importance for understanding the complex interaction brain-heart. In the present study, this interaction was analyzed in polysomnography recordings of 28 patients diagnosed with obstructive sleep apnea (OSA) and compared with a group of 10 control subjects. Electroencephalography and electrocardiography signals from these polysomnography time series were characterized employing Granger causality computation to measure the directed connectivity among five brain waves and three spectral subbands of heart rate variability. Polysomnography data from OSA patients were recorded before and during a first session of continuous positive air pressure (CPAP) therapy in a split-night study. Results showed that CPAP therapy allowed the recovery of inner brain connectivities, mainly in subsystems involving the theta wave. In addition, differences between control and OSA patients were established in connections that involve lower frequency ranges of heart rate variability. This information can be potentially useful in the initial diagnosis of OSA, and determine the role of cardiac activity in sleep dynamics based on the use of three subbands of heart rate variability.

LEER
Smart homes and home health monitoring technologies for older adults: A systematic review
...
Liu, Lili | 2016

The aim of this paper was to conduct a systematic literature review to determine: (1) the levels of technology readiness among older adults and, (2) evidence for smart homes and home-based health-monitoring technologies that support aging in place for older adults who have complex needs.

LEER
SOPHIA: System for Ophthalmic Image Acquisition, Transmission, and Intelligent Analysis
...
González Osorio, Fabio Augusto | 2020

Ocular diseases are one of the main causes of irreversible disability in people in productive age. In 2020, approximately 18% of the worldwide population was estimated to suffer of diabetic retinopathy and diabetic macular edema, but, unfortunately, only half of these people were correctly diagnosed. On the other hand, in Colombia, the diabetic population (8% of the country’s total population) presents or has presented some ocular complication that has led to other associated costs and, in some cases, has caused vision limitation or blindness. Eye fundus images are the fastest and most economical source of ocular information that can provide a full clinical assessment of the retinal condition of patients. However, the number of ophthalmologists is insufficient and the clinical settings, as well as the attention of these experts, are limited to urban areas. Also, the analysis of said images by professionals requires extensive training, and even for experienced ones, it is a cumbersome and error-prone process. Deep learning methods have marked important breakthroughs in medical imaging due to outstanding performance in segmentation, detection, and disease classification tasks. This article presents SOPHIA, a deep learning-based system for ophthalmic image acquisition, transmission, intelligent analysis, and clinical decision support for the diagnosis of ocular diseases. The system is under active development in a project that brings together healthcare provider institutions, ophthalmology specialists, and computer scientists. Finally, the preliminary results in the automatic analysis of ocular images using deep learning are presented, as well as future work necessary for the implementation and validation of the system in Colombia. Vol. 9 Núm. 10 (2020): Pedagogía del deseo de saber y conocer.

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Teaching maintenance of medical devices in simulation centers: a pilot study
...
Quiroga Torres, Daniel Alejandro | 2016

This paper aims to measure what the students’ perceived learning outcome achievements are after finishing medical devices courses I and II. This is a pre- post-test with no control group study design. Twenty-four students doing medical devices courses I and II with a test in the simulation center of a Biomedical Engineering Program participated in this pilot study. A paper-based survey composed of a demographic and 5-point Likert (“1” is strongly disagree and “5” is strongly agree) measured the students’ perceived learning outcome achievements after exposing them to medical devices courses. A Wilcoxon signed-rank test and Mann-Whitney U Test statistics were conducted to test the two hypotheses of this study. Our analysis showed statistically significant results between the pre-survey sum mean and SD: 7.50, 1.31; and between the post-survey mean and SD: 8.56, 1.15, p=0.015, indicating the students’ perceived learning outcome achievements after putting them through medical devices courses I and II had significantly improved by the end of the courses. Also, no statistically significant results were found between the post-survey mean and SD: 4.37, 0.57 learning outcome perceptions or between the students’ actual marks mean and SD: 4.58, 0.18, p=0.28), indicating no differences between what the students perceived they had learned compared with what they had really learned.

LEER
The state of knowledge on technologies and their use for fall detection: A scoping review
...
Cruz, Antonio miguel | 2018

Globally, populations are aging with increasing life spans. The normal aging process and the resulting disabilities increase fall risks. Falls are an important cause of injury, loss of independence and institutionalization. Technologies have been developed to detect falls and reduce their consequences but their use and impact on quality of life remain debatable. Reviews on fall detection technologies exist but are not extensive. A comprehensive literature review on the state of knowledge of fall detection technologies can inform research, practice, and user adoption.

LEER
Transmission of whole body vibration to the lower body in static and dynamic half-squat exercises
...
Munera Ramirez, Marcela Cristina | 2016

Whole body vibration (WBV) is used as a training method but its physical risk is not yet clear. Hence, the aim of this study is to assess the exposure to WBV by a measure of acceleration at the lower limb under dynamic and static postural conditions. The hypothesis of this paper is that this assessment is influenced by the frequency, position, and movement of the body. Fifteen healthy males are exposed to vertical sinusoidal vibration at different frequencies (20–60 Hz), while adopting three different static postures (knee extension angle: 180°, 120° and 90°) or performing a dynamic half-squat exercise. Accelerations at input source and at three joints of the lower limb (ankle, knee, and hip) are measured using skin-mounted accelerometers. Acceleration values (g) in static conditions show a decrease in the vibrational dose when it is measured at a more proximal location in the lower extremity. The results of the performed statistical test show statistically significant differences (p < 0.05) in the transmissibility values caused by the frequency, the position, and to the presence of the movement and its direction at the different conditions. The results confirm the initial hypothesis and justify the importance of a vibration assessment in dynamic conditions.

LEER
Users' Attitudes Towards Personal Health Records: A Cross-Sectional Pilot Study
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Khaneghah, Peyman Azad | 2016

Background: Prevention and management of chronic conditions is a priority for many healthcare systems. Personal health records have been suggested to facilitate implementation of chronic care programs. However, patients’ attitude towards personal health records (PHRs) can significantly affect the adoption rates and use of PHRs. Objectives: to evaluate the attitude of patients with Type II diabetes towards using a PHR to manage their condition. Methods: We used a cross-sectional exploratory pilot study. Fifty-four (54) patients used a PHR to monitor and record their blood glucose levels, diet, and activities for 30 days, and to communicate with their clinicians. At the end of the study, patients responded to a survey based on three constructs borrowed from different technology acceptance frameworks: relative advantage, job fit, and perceived usefulness. A multivariate predictive model was formed using partial least squaring technique (PLS) and the effect of each construct on the patients’ attitude towards system use was evaluated. Patients also participated in a semi-structured interview. Results: We found a significant positive correlation between job fit and attitude (JF → ATT = +0.318, p<0.01). There was no statistical evidence of any moderating or mediating effect of other main constructs or any of the confounding factors (i.e., age, gender, time after diagnosed) on attitude. Conclusion: The attitude of patients towards using PHR in management of their diabetes was positive. Their attitude was mainly influenced by the extent to which the system helped them better perform activities and self-manage their condition.

LEER
What does the literature say about using electronic pillboxes for older adults? A systematic literature review
...
Cruz , Antonio Miguel | 2018

Clinical studies used commercially well-established electronic pillboxes with a high TRL. New electronic pillboxes in development had a low TRL. The discovered outcome was mainly adherence to medication. The overall mean adherence to medication regimens for all the studies using an electronic pillbox was higher than the gold standard of a good adherence level cut-off point (mean adherence 88.8%>80%). However, we found a large variation in this variable (SD = 10.7). With regard to an older adult population’s adherence to medication regimens, for the outcome variable of those who had undergone a kidney transplant, the clinical evidence that electronic pillboxes have a positive impact was strong (1b); for those with a chronic hepatitis C medical condition, the clinical evidence was medium (3), and for those with arterial hypertension and multiple chronic (diabetes and hypertension) medical conditions, the clinical evidence was weak (5).

LEER
What does the literature say about using robots on children with disabilities?
...
Cruz, Antonio Miguel | 2017

The purpose of this study is to examine the extent and type of robots used for the rehabilitation and education of children and young people with CP and ASD and the associated outcomes.

LEER

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Repositorio Digital

Listar AA. Gibiome por título

Large-Range Polymer Optical-Fiber Strain-Gauge Sensor for Elastic Tendons in Wearable Assistive Robots

Multimodal Human–Robot Interaction for Walker-Assisted Gait

Segmentation of retinal fluids and hyperreflective foci using deep learning approach in optical coherence tomography scans

Sleep apnea: Tracking effects of a first session of CPAP therapy by means of Granger causality

Smart homes and home health monitoring technologies for older adults: A systematic review

SOPHIA: System for Ophthalmic Image Acquisition, Transmission, and Intelligent Analysis

Teaching maintenance of medical devices in simulation centers: a pilot study

The state of knowledge on technologies and their use for fall detection: A scoping review

Transmission of whole body vibration to the lower body in static and dynamic half-squat exercises

Users' Attitudes Towards Personal Health Records: A Cross-Sectional Pilot Study

What does the literature say about using electronic pillboxes for older adults? A systematic literature review

What does the literature say about using robots on children with disabilities?

Envíos recientes

Large-Range Polymer Optical-Fiber Strain-Gauge Sensor for Elastic Tendons in Wearable Assistive Robots

Multimodal Human–Robot Interaction for Walker-Assisted Gait

Segmentation of retinal fluids and hyperreflective foci using deep learning approach in optical coherence tomography scans

Sleep apnea: Tracking effects of a first session of CPAP therapy by means of Granger causality

Smart homes and home health monitoring technologies for older adults: A systematic review

SOPHIA: System for Ophthalmic Image Acquisition, Transmission, and Intelligent Analysis

Teaching maintenance of medical devices in simulation centers: a pilot study

The state of knowledge on technologies and their use for fall detection: A scoping review

Transmission of whole body vibration to the lower body in static and dynamic half-squat exercises

Users' Attitudes Towards Personal Health Records: A Cross-Sectional Pilot Study

What does the literature say about using electronic pillboxes for older adults? A systematic literature review

What does the literature say about using robots on children with disabilities?

Listar AA. Gibiome por título

Large-Range Polymer Optical-Fiber Strain-Gauge Sensor for Elastic Tendons in Wearable Assistive Robots ﻿

Multimodal Human–Robot Interaction for Walker-Assisted Gait ﻿

Segmentation of retinal fluids and hyperreflective foci using deep learning approach in optical coherence tomography scans ﻿

Sleep apnea: Tracking effects of a first session of CPAP therapy by means of Granger causality ﻿

Smart homes and home health monitoring technologies for older adults: A systematic review ﻿

SOPHIA: System for Ophthalmic Image Acquisition, Transmission, and Intelligent Analysis ﻿

Teaching maintenance of medical devices in simulation centers: a pilot study ﻿

The state of knowledge on technologies and their use for fall detection: A scoping review ﻿

Transmission of whole body vibration to the lower body in static and dynamic half-squat exercises ﻿

Users' Attitudes Towards Personal Health Records: A Cross-Sectional Pilot Study ﻿

What does the literature say about using electronic pillboxes for older adults? A systematic literature review ﻿

What does the literature say about using robots on children with disabilities? ﻿

Envíos recientes

Large-Range Polymer Optical-Fiber Strain-Gauge Sensor for Elastic Tendons in Wearable Assistive Robots

Multimodal Human–Robot Interaction for Walker-Assisted Gait

Segmentation of retinal fluids and hyperreflective foci using deep learning approach in optical coherence tomography scans

Sleep apnea: Tracking effects of a first session of CPAP therapy by means of Granger causality

Smart homes and home health monitoring technologies for older adults: A systematic review

SOPHIA: System for Ophthalmic Image Acquisition, Transmission, and Intelligent Analysis

Teaching maintenance of medical devices in simulation centers: a pilot study

The state of knowledge on technologies and their use for fall detection: A scoping review

Transmission of whole body vibration to the lower body in static and dynamic half-squat exercises

Users' Attitudes Towards Personal Health Records: A Cross-Sectional Pilot Study

What does the literature say about using electronic pillboxes for older adults? A systematic literature review

What does the literature say about using robots on children with disabilities?

Large-Range Polymer Optical-Fiber Strain-Gauge Sensor for Elastic Tendons in Wearable Assistive Robots

Multimodal Human–Robot Interaction for Walker-Assisted Gait

Segmentation of retinal fluids and hyperreflective foci using deep learning approach in optical coherence tomography scans

Sleep apnea: Tracking effects of a first session of CPAP therapy by means of Granger causality

Smart homes and home health monitoring technologies for older adults: A systematic review

SOPHIA: System for Ophthalmic Image Acquisition, Transmission, and Intelligent Analysis

Teaching maintenance of medical devices in simulation centers: a pilot study

The state of knowledge on technologies and their use for fall detection: A scoping review

Transmission of whole body vibration to the lower body in static and dynamic half-squat exercises

Users' Attitudes Towards Personal Health Records: A Cross-Sectional Pilot Study

What does the literature say about using electronic pillboxes for older adults? A systematic literature review

What does the literature say about using robots on children with disabilities?