Parâmetros de referência espaço-temporais de um sensor inercial para sujeitos brasileiros sadios / Spatial-temporal gait parameters based on a wearable inertial sensor of healthy Brazilian subjects

Gait analysis in a laboratory may be expensive, time-consuming, and restricted to a controlled environment. Validated wearable technology may be an alternative to such analysis. However, wearable technologies should demonstrate reference values of a healthy population. Objective: To establish spatio-temporal gait reference values of an accelerometer (G-Walk) in a healthy Brazilian population. Methods: This is a cross-sectional study with 124 healthy subjects evaluated with G-Walk in the 6-minute and 10-meter walk tests (6MWT and 10MWT). Gait parameters of Velocity, Cadence, Distance, and gait symmetry variables were retrieved for analysis. Clinical and demographical characteristics were also collected and tested with simple linear regression as covariables of the gait characteristics. The bootstrapped 5th percentile of the gait parameter established the reference values. If a covariable influence was found, the reference values were established by subgroup analysis according to the covariable. Results: The study analyzed 114 subjects, mostly women (67.74%), aged 39.36 (SD 12.18). Height was a covariable of cadence for the 10MWT and cadence and stride length for the 6MWT. Age and sex combined were covariables of 6MWT velocity, and sex alone was a covariable of 6MWT. All reference values for symmetry were above 89%, velocity at the 10MWT was above 1.0m/s, and distance at the 6MWT was 354m and 359.5 for females and males, respectively. Conclusions: Our study generated reference values for spatio-temporal gait analysis with G-Walk of a population of a major urban area, considering the covariables of age, height, and sex.

Análises da marcha em laboratório tem custo elevado, demandando tempo e ambiente controlado. Wearables são equipamentos portáteis que podem ser alternativas aos laboratórios. Valores de referência podem determinar parâmetros para análises de marcha de pessoas com patologias. Objetivo: Estabelecer valores de referência espaço-temporais de um acelerômetro (G-Walk) em uma população saudável. Métodos: Trata-se de um estudo transversal com indivíduos saudáveis avaliados com G-Walk nos testes de caminhada de 6 minutos e de 10 metros (TC6 e TC10). Velocidade, cadência, distância e de simetria da marcha foram analisados. Características clínicas e demográficas também foram testadas com regressão linear simples como covariáveis das características da marcha. Os valores de referência foram estabelecidos pelo quinto percentil dos parâmetros por bootstrap e na presença de covariáveis demográficas, os valores foram estabelecidos por análise de subgrupos, de acordo com a covariável. Resultados: O estudo analisou 114 sujeitos, em sua maioria mulheres (67,74%), com idade de 39,36 (DP 12,18). A altura foi uma covariável da cadência do TC10 e da cadência e comprimento da passada do TC6. Idade e sexo combinados foram covariáveis da velocidade do TC6, e o sexo foi uma covariável do TC6. Todos os valores de referência para simetria foram superiores a 89%, a velocidade no TC10 foi superior a 1,0m/s e a distância no TC6 foi de 354m e 359,5m para mulheres e homens, respectivamente. Conclusões: Nosso estudo gerou valores de referência para análise espaço-temporal da marcha com o equipamento G-Walk em uma população de uma grande área urbana, considerando as covariáveis idade, altura e sexo.

Effect of transcutaneous abdominal electrical stimulation in people with constipation due to spinal cord injuries: a pilot study / Efecto de la electroestimulación abdominal transcutánea sobre el estreñimiento en personas con lesión de la médula espinal: estudio piloto / Efeito da eletroestimulação abdominal transcutânea no quadro de constipação em pessoas com lesão medular: estudo piloto

ABSTRACT Objective: To evaluate the effect of abdominal electrical stimulation (EE) on bowel movement frequency and feces consistency and expelled amount in people with constipation due to spinal cord injuries (SCI). Method: This is an experimental, crossover, randomized pilot study with two treatment groups: conventional intestinal rehabilitation and conventional rehabilitation associated with EE via 8- and 20-Hz Functional Electrical Stimulation (FES) of the abdominal muscles. Both groups were followed for two weeks with daily 30-minute EE sessions. Participants were hospitalized in a rehabilitation institute in the municipality of São Paulo. Data were analyzed using descriptive and inferential statistics. Results: This study included 10 people with SCI, of which most were male (70%), with a mean age of 39 years (SD = 16.37). EE, associated with conventional treatment, was more effective in increasing defecation frequency (p = 0.029) and amount of feces expelled (p = 0.031). Conclusion: Abdominal EE, associated with conventional treatment, helped to increase defecation frequency and amount of feces expelled in people with constipation due to SCI. This pilot study will serve as the basis for a future clinical trial with greater sampling and statistical evidence.

RESUMEN Objetivo: Evaluar el efecto de la electroestimulación abdominal (EE) sobre la frecuencia de las evacuaciones, la consistencia y la cantidad de heces en personas con estreñimiento debido a una lesión de la médula espinal (LME). Método: Estudio piloto experimental de tipo crossover-aleatorizado en dos grupos de tratamiento: convencional rehabilitación intestinal y convencional asociado a EE con Functional Electrical Stimulation (FES) de 8 y 20 Hz aplicados a los músculos abdominales. Se realizó un seguimiento de ambos grupos durante dos semanas con 30 minutos de sesión diaria de EE. Los participantes estaban hospitalizados en un instituto de rehabilitación de la ciudad de São Paulo. Los datos se analizaron mediante estadística descriptiva e inferencial. Resultados: Diez personas con LME participaron en el estudio, la mayoría hombres (70%) con una edad media de 39 años (DE = 16,37). La EE asociada al tratamiento convencional demostró ser más eficaz en el aumento de la frecuencia de evacuación (p = 0,029) y la cantidad de heces (p = 0,031). Conclusión: La EE abdominal asociada al tratamiento convencional ayudó a aumentar la frecuencia de evacuación y la cantidad de heces en el contexto de estreñimiento en personas con LME. Este estudio piloto servirá de base para futuros ensayos clínicos con mayor muestreo y evidencia estadística.

RESUMO Objetivo: Avaliar o efeito da eletroestimulação (EE) abdominal sobre a frequência de evacuações, a consistência e a quantidade de fezes em pessoas com constipação decorrente da lesão medular (LM). Método: Estudo piloto experimental do tipo crossover-randomizado em dois grupos de tratamento: convencional de reabilitação intestinal e convencional associado à EE com Functional Electrical Stimulation (FES) de 8 e 20 Hz aplicados na musculatura abdominal. Ambos os grupos em seguimento por duas semanas, com 30 minutos de sessão diária de EE. Os participantes estavam internados em um instituto de reabilitação da cidade de São Paulo. Os dados foram analisados por meio de estatística descritiva e inferencial. Resultados: Participaram do estudo 10 pessoas com LM, a maioria do sexo masculino (70%), com média de idade de 39 anos (DP = 16,37). A EE, associada ao tratamento convencional, mostrou-se mais eficaz no aumento da frequência evacuatória (p = 0,029) e na quantidade de fezes (p = 0,031). Conclusão: A EE abdominal associada ao tratamento convencional auxiliou no aumento da frequência evacuatória e na quantidade de fezes no quadro de constipação em pessoas com LM. Este estudo piloto servirá como base para um futuro ensaio clínico com maior amostragem e comprovação estatística.

Appraising the effectiveness of electrical and magnetic brain stimulation techniques in acute major depressive episodes: an umbrella review of meta-analyses of randomized controlled trials

Electrical and magnetic brain stimulation techniques present distinct mechanisms and efficacy in the acute treatment of depression. This was an umbrella review of meta-analyses of randomized controlled trials of brain stimulation techniques for managing acute major depressive episodes. A systematic review was performed in the PubMed/MEDLINE databases from inception until March 2020. We included the English language meta-analysis with the most randomized controlled trials on the effects of any brain stimulation technique vs. control in adults with an acute depressive episode. Continuous and dichotomous outcomes were assessed. A Measurement Tool to Assess Systematic Reviews-2 was applied and the credibility of evidence was assessed using the Grading of Recommendations Assessment, Development and Evaluation framework. Seven meta-analyses were included (5,615 patients), providing evidence for different modalities of brain stimulation techniques. Three meta-analyses were evaluated as having high methodological quality, three as moderate, and one as low. The highest quality of evidence was found for high frequency-repetitive transcranial magnetic stimulation (rTMS), transcranial direct current stimulation, and bilateral rTMS. There is strong clinical research evidence to guide future clinical use of some techniques. Our results confirm the heterogeneity of the effects across these techniques, indicating that different mechanisms of action lead to different efficacy profiles.

Medical perception of stroke care conditions in Brazil / Percepção médica sobre as condições para atendimento do AVC no Brasil

ABSTRACT Stroke is currently the second leading cause of death in Brazil. Neurologists' reports on the absence of adequate resources for stroke care are frequent; however, there are no objective data on this perception. Objective To assess the perception of neurologists of stroke care conditions in Brazil. Methods Neurologists from all over Brazil were surveyed by means of an anonymous questionnaire about the main shortcomings in stroke care, focusing particularly on physical structure and infrastructure (diagnostic methods, patient transport, availability of beds, multi-professional team). Results The main shortcomings are indicated: the worst conditions, among all items surveyed, were found in the public sector. In the private sector, conditions were better. Conclusions Care conditions are worse in the public sector with regard to both infrastructure and human resources. Future public health policies for the prevention and treatment of stroke should be formulated, taking into consideration neurologists' perceptions.

RESUMO O acidente vascular cerebral é atualmente a segunda causa de morte no Brasil. São frequentes os relatos de médicos neurologistas sobre a ausência de recursos adequados para o atendimento do AVC, no entanto, não existem dados objetivos sobre essa percepção. Objetivo Analisar a percepção de médicos neurologistas sobre as condições para o atendimento de AVC no Brasil. Métodos Neste estudo foi realizada pesquisa por questionário anônimo com médicos neurologistas de todo o Brasil, perguntando-se as principais deficiências para o atendimento, com foco na estrutura física, infraestrutura (métodos diagnósticos, transporte do doente, disponibilidade de leitos, equipe multiprofissional). Resultados As principais deficiências são apontadas; no setor público notou-se as piores condições, em todos os itens pesquisados. No setor privado, as condições são melhores. Conclusões As condições de atendimento são piores no setor público, tanto de infraestrutura quanto de recursos humanos. Futuras políticas de saúde pública para prevenção e tratamento do AVC deveriam ser elaboradas levando em consideração a percepção do neurologista.

Non-invasive brain stimulation and computational models in post-stroke aphasic patients: single session of transcranial magnetic stimulation and transcranial direct current stimulation. A randomized clinical trial

ABSTRACT CONTEXT AND OBJECTIVE: Patients undergoing the same neuromodulation protocol may present different responses. Computational models may help in understanding such differences. The aims of this study were, firstly, to compare the performance of aphasic patients in naming tasks before and after one session of transcranial direct current stimulation (tDCS), transcranial magnetic stimulation (TMS) and sham, and analyze the results between these neuromodulation techniques; and secondly, through computational model on the cortex and surrounding tissues, to assess current flow distribution and responses among patients who received tDCS and presented different levels of results from naming tasks. DESIGN AND SETTING: Prospective, descriptive, qualitative and quantitative, double blind, randomized and placebo-controlled study conducted at Faculdade de Ciências Médicas da Santa Casa de São Paulo. METHODS: Patients with aphasia received one session of tDCS, TMS or sham stimulation. The time taken to name pictures and the response time were evaluated before and after neuromodulation. Selected patients from the first intervention underwent a computational model stimulation procedure that simulated tDCS. RESULTS: The results did not indicate any statistically significant differences from before to after the stimulation.The computational models showed different current flow distributions. CONCLUSIONS: The present study did not show any statistically significant difference between tDCS, TMS and sham stimulation regarding naming tasks. The patients'responses to the computational model showed different patterns of current distribution.