Journal Papers by Adriano A Pereira
Measurement, 2009
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Papers by Adriano A Pereira
BioMedical Engineering OnLine
Background During the aging process, cognitive functions and performance of the muscular and neur... more Background During the aging process, cognitive functions and performance of the muscular and neural system show signs of decline, thus making the elderly more susceptible to disease and death. These alterations, which occur with advanced age, affect functional performance in both the lower and upper members, and consequently human motor functions. Objective measurements are important tools to help understand and characterize the dysfunctions and limitations that occur due to neuromuscular changes related to advancing age. Therefore, the objective of this study is to attest to the difference between groups of young and old individuals through manual movements and whether the combination of features can produce a linear correlation concerning the different age groups. Methods This study counted on 99 participants, these were divided into 8 groups, which were grouped by age. The data collection was performed using inertial sensors (positioned on the back of the hand and on the back of ...
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Springer eBooks, 2022
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The objective of this work was to use the autocorrelation function to assess the fine motor perfo... more The objective of this work was to use the autocorrelation function to assess the fine motor performance of a healthy control group (CG) and people with Parkinson's disease (PD), whose fluctuations caused by the disease compromise motor skills, performed mainly by the hands and fingers essential for daily activities such as dressing, carrying objects and taking care of personal hygiene. For this, accelerometer signals were collected while the volunteers drew a sinusoidal pattern. The correlogram was estimated and two features were calculated from it: (i) the normalized area under the curve (𝑨𝒖𝑪); (ii) the difference between matching peaks and valleys from the reference and estimated correlograms (𝒗𝒎𝒎). These features allowed for the discrimination between drawing patterns of CG (𝒗𝒎𝒎= 0.154±0.063, 𝑨𝒖𝑪 = 0.204±0.040) and PD (𝒗𝒎𝒎 = 0.239±0.085, 𝑨𝒖𝑪 = 0.179±0.033) groups. Following the verification of normality (Shapiro-Wilk, p > 0.05), the t-test was applied to confirm the significant differences between groups (p < 0.05). The Cohen's d effect size (p < 0.05) was medium (0.730) for 𝑨𝒖𝑪 and large (1.252) for 𝒗𝒎𝒎. This further confirms the differences between the features extracted from the groups. Therefore, the features 𝑨𝒖𝑪 and 𝒗𝒎𝒎 estimated from the autocorrelation function are effective for the assessment of the motor performance of healthy individuals and people with PD.
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A Doença de Parkinson (DP) é uma afecção do Sistema Nervoso Central (SNC) que provoca a perda pro... more A Doença de Parkinson (DP) é uma afecção do Sistema Nervoso Central (SNC) que provoca a perda progressiva de neurônios produtores de dopamina da substância negra, o que reduz a atividade das áreas motoras do córtex cerebral. Os comprometimentos manifestam-se inicialmente de forma motora, como bradicinesia, rigidez muscular, tremor em repouso e instabilidade postural. A evolução da DP também gera complicações secundárias e um dos sintomas secundários mais severos é o congelamento da marcha, do inglês, freezing of the gait (FOG). O FOG é uma desordem única na qual os indivíduos não conseguem continuar ou iniciar o movimento de caminhar. O presente trabalho tem como objetivo reunir informações para descrever e entender o FOG e agrupar as hipóteses acerca desse sintoma. A busca na literatura foi realizada em bases de dados robustas, considerando artigos em inglês e português e após a triagem foram considerados 30 artigos. O trabalho reune definições, estudos, gatilhos e hipóteses sobre o tema e também propõe trabalhos futuros.
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Zenodo (CERN European Organization for Nuclear Research), Dec 27, 2022
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Zenodo (CERN European Organization for Nuclear Research), Dec 27, 2022
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Research Square (Research Square), Oct 6, 2020
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Research on Biomedical Engineering, Mar 18, 2021
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Neurosurgical Review, Oct 19, 2021
Deep brain stimulation (DBS) is an effective treatment of several types of neurological condition... more Deep brain stimulation (DBS) is an effective treatment of several types of neurological conditions, including Parkinson’s disease, essential tremor, dystonia, and epilepsy. Despite technological progress in the past 10 years, the number of studies reporting side effects of DBS has increased, mainly due to hardware failures. This review investigated studies published between 2017 and 2021 to identify the prevalence of distinct types of hardware failures related to DBS. In total, fifteen studies were selected for the estimate of the prevalence of five distinct types of hardware failures: high impedance, fracture or failure of the lead or other parts of the implant, skin erosion and infection, lead malposition or migration, and implantable pulse generator (IPG) malfunction. The quality evaluation of the studies suggests a need to report results including populations from distinct regions of the world so that results can be generalized. The objective analysis of the prevalence of hardware failures showed that skin erosion and infection presented the highest prevalence in relation to other hardware failures. Despite the sophistication of the surgical technique of DBS over time, there is a considerable complication rate, about 7 per 100 individuals (prevalence=6.67%,CI=[2.26%,12.49%]\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathrm{prevalence}=6.67\%, CI = [2.26\%,12.49\%]$$\end{document}, in which CI is the confidence interval). Future research can also include correlation analysis with the aim of understanding the correlation between distinct hardware failures and variables such as gender, type of disorder, and age.
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Research on Biomedical Engineering, Jan 15, 2021
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Zenodo (CERN European Organization for Nuclear Research), Dec 27, 2022
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IFMBE proceedings, 2019
Hospital furniture is the furniture used as support to specific services at the hospital. The qua... more Hospital furniture is the furniture used as support to specific services at the hospital. The quality and the conservation state of this furniture influence on security and performance of the health professionals and the patient’s recover. Thereby, this study carries on an evaluation of the quality and the conservational state of the furniture used at general inpatient rooms from different inpatient units of three hospitals, aiming to detect the factors that can influence on patient care or compromising the attendance. The furniture included in this study are hospital bed, meal table, companion armchair, locker, bedside table, serum support, and two-step stairs. Two methods were used for this evaluation: checklist and questionnaire. This research was approved for the Ethics committee with de CAAE: 65008617.1.0000.5152 and was fullfilled on Inpatient Units of Health Care Facility (HCF) Public, Private and maintained by a Non-governmental Organization (NGO), for comparison. The Private HCF got mostly positive results. Followed by the HCF maintained by a NGO and, for last, the Public HCF. The characteristics of demand, economy and exposure that influence these results were discussed.
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Zenodo (CERN European Organization for Nuclear Research), Dec 27, 2022
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XXVI Brazilian Congress on Biomedical Engineering, 2019
This work consists of a systematic review that aims identify and illustrate the various limitatio... more This work consists of a systematic review that aims identify and illustrate the various limitations that health systems currently face regarding the metrological system reliability of medical equipment. Studies have been made in the search for scientific articles in databases chosen, and after the application of the criteria for inclusion and exclusion for articles, obtained 6 publications, that represented the base of the construction of this work. The metrological reliability of medical equipment is extremely important in health services, as it ensures, among other things, the safety of diagnostics and treatments. It was possible to observe that this is a matter of very little presence in the daily lives of the professionals of the health area, pointing to the need for evaluation of the reliability in most cases presented.
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Research on Biomedical Engineering, 2019
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Journal Papers by Adriano A Pereira
Papers by Adriano A Pereira