Effects of atelectatic areas on the surrounding lung tissue during mechanical ventilation in an experimental model of acute lung injury induced by lipopolysaccharide / Efeitos das áreas atelectásicas no tecido pulmonar circundante durante a ventilação mecânica em um modelo experimental de lesão pulmonar aguda induzida por lipopolissacarídeo

ABSTRACT Objective: To assess the effect of atelectasis during mechanical ventilation on the periatelectatic and normal lung regions in a model of atelectasis in rats with acute lung injury induced by lipopolysaccharide. Methods: Twenty-four rats were randomized into the following four groups, each with 6 animals: the Saline-Control Group, Lipopolysaccharide Control Group, Saline-Atelectasis Group, and Lipopolysaccharide Atelectasis Group. Acute lung injury was induced by intraperitoneal injection of lipopolysaccharide. After 24 hours, atelectasis was induced by bronchial blocking. The animals underwent mechanical ventilation for two hours with protective parameters, and respiratory mechanics were monitored during this period. Thereafter, histologic analyses of two regions of interest, periatelectatic areas and the normally-aerated lung contralateral to the atelectatic areas, were performed. Results: The lung injury score was significantly higher in the Lipopolysaccharide Control Group (0.41 ± 0.13) than in the Saline Control Group (0.15 ± 0.51), p < 0.05. Periatelectatic regions showed higher lung injury scores than normally-aerated regions in both the Saline-Atelectasis (0.44 ± 0.06 x 0.27 ± 0.74 p < 0.05) and Lipopolysaccharide Atelectasis (0.56 ± 0.09 x 0.35 ± 0.04 p < 0.05) Groups. The lung injury score in the periatelectatic regions was higher in the Lipopolysaccharide Atelectasis Group (0.56 ± 0.09) than in the periatelectatic region of the Saline-Atelectasis Group (0.44 ± 0.06), p < 0.05. Conclusion: Atelectasis may cause injury to the surrounding tissue after a period of mechanical ventilation with protective parameters. Its effect was more significant in previously injured lungs.

RESUMO Objetivo: Avaliar o efeito da atelectasia durante a ventilação mecânica nas regiões periatelectáticas e pulmonares normais em um modelo de atelectasia em ratos com lesão pulmonar aguda induzida por lipopolissacarídeo. Métodos: Foram distribuídos aleatoriamente 24 ratos em quatro grupos, cada um com 6 animais: Grupo Salina-Controle, Grupo Lipopolissacarídeo-Controle, Grupo Salina-Atelectasia e Grupo Lipopolissacarídeo-Atelectasia. A lesão pulmonar aguda foi induzida por injeção intraperitoneal de lipopolissacarídeo. Após 24 horas, a atelectasia foi induzida por bloqueio brônquico. Os animais foram submetidos à ventilação mecânica por 2 horas com parâmetros ventilatórios protetores, e a mecânica respiratória foi monitorada durante esse período. Em seguida, foram realizadas análises histológicas de duas regiões de interesse: as áreas periatelectásicas e o pulmão normalmente aerado contralateral às áreas atelectásicas. Resultados: O escore de lesão pulmonar foi significativamente maior no Grupo Controle-Lipopolissacarídeo (0,41 ± 0,13) do que no Grupo Controle-Solução Salina (0,15 ± 0,51), com p < 0,05. As regiões periatelectásicas apresentaram escores maiores de lesão pulmonar do que as regiões normalmente aeradas nos Grupos Atelectasia-Solução Salina (0,44 ± 0,06 versus 0,27 ± 0,74, p < 0,05) e Atelectasia-Lipopolissacarídeo (0,56 ± 0,09 versus 0,35 ± 0,04, p < 0,05). O escore de lesão pulmonar nas regiões periatelectásicas foi maior no Grupo Atelectasia-Lipopolissacarídeo (0,56 ± 0,09) do que na região periatelectásica do Grupo Atelectasia-Solução Salina (0,44 ± 0,06), p < 0,05. Conclusão: A atelectasia pode causar lesão no tecido circundante após um período de ventilação mecânica com parâmetros ventilatórios protetores. Seu efeito foi mais significativo em pulmões previamente lesionados.

Factors associated with postural balance in patients with end-stage renal disease on hemodialysis.

BACKGROUND: Patients with end-stage renal disease on hemodialysis have postural balance impairments due to uremic syndrome and hemodialysis complications. This study evaluated the factors associated with postural balance in patients on hemodialysis. METHODS: This cross-sectional study included patients on hemodialysis [n = 93, 62.0 (16.0) years]. Postural balance was evaluated using a force plate in a static position with eyes opened and eyes closed on a firm surface and with eyes opened on a foam surface to register the center of pressure path length. Physical function was assessed by isometric handgrip force, the 5-repetition sit-to-stand test, and gait speed. The level of physical activity and quality of life were evaluated by accelerometry and the 36-Item Short Form Health Survey, respectively. FINDINGS: After adjustment for potential confounders, the multiple linear regression analysis showed that the presence of diabetes mellitus and neurological disease and gait speed were significantly associated with the center of pressure path length in the eyes opened test (R2 = 0.263; p < 0.001). The center of pressure path length in the eyes closed test was significantly associated with the presence of neurological disease (R2 = 0.177; p = 0.002). The center of pressure path length in the eyes opened on a foam surface test was significantly associated with the presence of diabetes mellitus (R2 = 0.223; p < 0.001). INTERPRETATION: Poor postural balance was associated with the presence of diabetes mellitus and neurological disease and a slower gait speed in patients on hemodialysis.

Association Between Protocols of the Sit-to-Stand Test and Lower Limb Muscle Force Output in Patients on Hemodialysis and Subjects Without Chronic Kidney Disease.

OBJECTIVE: To evaluate the association of three protocols of the sit-to-stand (STS) test with muscle force output of knee extension (KE) and knee flexion (KF) in patients on hemodialysis and subjects without chronic kidney disease. METHODS: This cross-sectional study included a hemodialysis group [n = 60, 59.5 (16.8) years, 55% female] and a control group [n = 60, 43.0 (11.8) years, 50% female]. The assessments were performed in 2 days, and the participants were submitted to three protocols of STS test (5-repetition STS, 10-repetition STS and 30-s STS) or muscle force output of the KE and KF evaluation by handheld dynamometer based on randomization. RESULTS: The hemodialysis group presented reduced muscle force output of the KE and KF, a longer time to perform the 5 STS and 10 STS tests, and a lower number of repetitions in the 30-s STS test. The three STS tests were associated with muscle force output of the KE in the hemodialysis group, in which the 10-repetition STS test showed the best association (R2 = 0.47; adjusted R2 = 0.42). However, the only association between the STS test and muscle force output of the KE in the control group was found in the 10-repetition STS test (R2 = 0.20; adjusted R2 = 0.13). CONCLUSIONS: The three protocols of STS tests were associated with muscle force output of the KE in patients on hemodialysis. However, the 10-repetition STS test was the best protocol to estimate the quadriceps muscle torque in these patients.

Association between fear of falling and a history of falls in patients with end-stage renal disease on hemodialysis.

INTRODUCTION: Hemodialysis patients have complications that increase fear of falling (FOF). This study evaluated the association between FOF and a retrospective history of falls in hemodialysis patients and investigated the ability of the Fall Efficacy Scale-International (FES-I) to discriminate fallers from nonfallers. METHODS: A retrospective study was conducted with 183 patients to investigate the history of falls in the last 12 months and to evaluate FOF by the FES-I. RESULTS: The univariate linear regression model showed that the FES-I score was significantly associated with a history of falls (p = 0.01). After adjustment for potential confounders, this association remained significant (R2  = 0.19, p < 0.001). The FES-I score showed an area under the curve of 0.660 with a cutoff point of 25 (sensitivity-61.8%; specificity-62.2%). CONCLUSION: FOF was associated with a history of falls in the 12-month period in hemodialysis patients, and FOF assessed by the FES-I was able to discriminate fallers from nonfallers.

Effects of atelectatic areas on the surrounding lung tissue during mechanical ventilation in an experimental model of acute lung injury induced by lipopolysaccharide.

OBJECTIVE: To assess the effect of atelectasis during mechanical ventilation on the periatelectatic and normal lung regions in a model of atelectasis in rats with acute lung injury induced by lipopolysaccharide. METHODS: Twenty-four rats were randomized into the following four groups, each with 6 animals: the Saline-Control Group, Lipopolysaccharide Control Group, Saline-Atelectasis Group, and Lipopolysaccharide Atelectasis Group. Acute lung injury was induced by intraperitoneal injection of lipopolysaccharide. After 24 hours, atelectasis was induced by bronchial blocking. The animals underwent mechanical ventilation for two hours with protective parameters, and respiratory mechanics were monitored during this period. Thereafter, histologic analyses of two regions of interest, periatelectatic areas and the normally-aerated lung contralateral to the atelectatic areas, were performed. RESULTS: The lung injury score was significantly higher in the Lipopolysaccharide Control Group (0.41 ± 0.13) than in the Saline Control Group (0.15 ± 0.51), p < 0.05. Periatelectatic regions showed higher lung injury scores than normally-aerated regions in both the Saline-Atelectasis (0.44 ± 0.06 x 0.27 ± 0.74 p < 0.05) and Lipopolysaccharide Atelectasis (0.56 ± 0.09 x 0.35 ± 0.04 p < 0.05) Groups. The lung injury score in the periatelectatic regions was higher in the Lipopolysaccharide Atelectasis Group (0.56 ± 0.09) than in the periatelectatic region of the Saline-Atelectasis Group (0.44 ± 0.06), p < 0.05. CONCLUSION: Atelectasis may cause injury to the surrounding tissue after a period of mechanical ventilation with protective parameters. Its effect was more significant in previously injured lungs.

Profile of professionals working in intradialytic exercise programs in Brazil: a national survey / Perfil dos profissionais que atuam em programas de exercício físico durante as sessões de hemodiálise: um estudo nacional

Abstract Objective: This survey was designed to assess the profile of professionals working in intradialytic exercise programs (IEPs) in Brazil and reveal the motivators and barriers they face. Methods: The survey was sent to physiotherapists and exercise physiologists working in IEPs in Brazil. Phone interviews and electronic forms were used to collect the answers to the survey questionnaire. Results: Forty-one of the 261 included dialysis centers had IEPs; 44 professionals answered the questionnaire over the phone and 26 used the electronic form to do it. A total of 70 professionals (mean age 33.4±7.4 years; 84.3% physiotherapists) answered the questionnaire. Resistance training was the preferred mode of therapy. Most of the IEPs were connected to research and were paid for by private health insurance. The desire to work in a different field (30.0%) and lack of resources (31.4%) were the most prevalent motivator and barrier cited by IEP professionals working in dialysis centers, respectively. Conclusion: The majority of the few professionals that work in IEPs in Brazil are physiotherapists. Lack of resources was the most commonly reported barrier faced by survey respondents.

Resumo Objetivo: Avaliar o perfil dos profissionais que atuam em programas de exercício físico intradialítico (EFI) no Brasil e as motivações e barreiras para a atuação desses profissionais. Métodos: Foram incluídos fisioterapeutas e profissionais de educação física que atuam em programas de EFI no Brasil. Para coletar os dados, foi aplicado um questionário por ligação telefônica ou formulário eletrônico. Resultados: Dos 261 centros de diálise analisados, 41 apresentaram programas de EFI, sendo que 44 profissionais responderam ao questionário por telefone e outros 26, por meio eletrônico. Foram avaliados 70 profissionais (33,4±7,4 anos, 84,3% fisioterapeutas). A modalidade terapêutica mais aplicada foi o treinamento resistido. A maioria dos programas de EFI está associada a atividades de pesquisa e é financiada pela saúde suplementar. A possibilidade de atuação em um novo campo de trabalho (30,0%) e a falta de recursos (31,4%) foram a motivação e a barreira mais prevalentes para atuação dos profissionais nos centros de diálise, respectivamente. Conclusão: Poucos profissionais atuam em programas de EFI no Brasil, sendo a maioria fisioterapeutas. A falta de recursos foi a barreira mais prevalente para a atuação desses profissionais.

Profile of professionals working in intradialytic exercise programs in Brazil: a national survey.

OBJECTIVE: This survey was designed to assess the profile of professionals working in intradialytic exercise programs (IEPs) in Brazil and reveal the motivators and barriers they face. METHODS: The survey was sent to physiotherapists and exercise physiologists working in IEPs in Brazil. Phone interviews and electronic forms were used to collect the answers to the survey questionnaire. RESULTS: Forty-one of the 261 included dialysis centers had IEPs; 44 professionals answered the questionnaire over the phone and 26 used the electronic form to do it. A total of 70 professionals (mean age 33.4±7.4 years; 84.3% physiotherapists) answered the questionnaire. Resistance training was the preferred mode of therapy. Most of the IEPs were connected to research and were paid for by private health insurance. The desire to work in a different field (30.0%) and lack of resources (31.4%) were the most prevalent motivator and barrier cited by IEP professionals working in dialysis centers, respectively. CONCLUSION: The majority of the few professionals that work in IEPs in Brazil are physiotherapists. Lack of resources was the most commonly reported barrier faced by survey respondents.

Relação entre o medo da COVID-19 e a sobrecarga física e mental de profissionais de saúde que realizam atendimento contínuo de pacientes durante a pandemia do novo coronavírus / Relationship between fear of COVID-19 and physical and mental burden of health professionals in the continuous care of patients during new coronavirus pandemic

Introdução: A pandemia da doença por coronavírus 19 (COVID-19) contribui para a exacerbação do estresse e sofrimento dos profissionais de saúde. Objetivo: Avaliar a relação entre o medo da COVID-19 e a sobrecarga física e mental dos profissionais de saúde em atendimento contínuo de pacientes durante a pandemia de COVID-19 em duas cidades da região do Campo das Vertentes no estado de Minas Gerais. Material e Métodos: Foi realizado um estudo descritivo transversal com 77 profissionais de saúde (32 (14) anos; 67,5% do gênero feminino) que estavam em atendimento contínuo durante a pandemia de COVID-19. Dados sociodemográficos e profissionais foram coletados e o medo foi avaliado pela Escala de Medo da COVID-19 (EMC-19), sintomas depressivos pelo Patient Health Questionnaire-9 (PHQ-9) e síndrome de Burnout pelo Maslach Burnout Inventory ­ Human Services Survey (MBI-HSS). Resultados: O escore total da EMC-19 se correlacionou com a carga horária de trabalho semanal (ρ= 0,395; p<0,001), o PHQ-9 (ρ= 0,332; p= 0,003) e as dimensões exaustão emocional (ρ= 0,253; p= 0,026), despersonalização (ρ= 0,243; p= 0,033) e baixa realização pessoal (ρ= -0,389; p<0,001) do MBI-HSS. No modelo de regressão linear ajustado para potenciais fatores confundidores, a EMC-19 continuou significativamente associada com a baixa realização pessoal apresentando coeficiente de determinação ajustado de 0,372 (p<0,001). Conclusão: O medo da COVID-19 nos profissionais de saúde em atendimento contínuo de pacientes durante a pandemia de COVID-19 nas duas cidades da região do Campo das Vertentes no estado de Minas Gerais se relacionou com sintomas depressivos e as características da síndrome de Burnout de exaustão emocional, despersonalização e baixa realização pessoal.

Introduction: The coronavirus disease 19 (COVID-19) pandemic contributes to the exacerbation of stress and suffering of health professionals. Objective: To evaluate the relationship between fear of COVID-19 and physical and mental burden of health professionals in the continuous care of patients during COVID-19 pandemic in two cities in the Campo das Vertentes region in the state of Minas Gerais. Material and Methods: A descriptive cross-sectional study was carried out with 77 health professionals (32 (14) years; 67.5% female) who were in continuous care during COVID-19 pandemic. Sociodemographic and professional data were collected and the fear of COVID-19 was taken from the Fear of COVID-19 Scale (FCV-19S), depressive symptoms by the Patient Health Questionnaire-9 (PHQ-9) and Burnout syndrome by the Maslach Burnout Inventory ­ Human Services Research (MBI-HSS). Results: The total score of FCV-19S correlated with the weekly workload (ρ= 0.395; p<0.001), the PHQ-9 (ρ= 0.332; p= 0.003) and the emotional exhaustion (ρ= 0.253; p= 0.026), depersonalization (ρ= 0.243; p= 0.033) and low sense of personal accomplishment (ρ= -0.389; p<0.001) dimensions of the MBI-HSS. In the linear regression model adjusted for potential confounders, the FCV-19S continued significantly associated with low sense of personal accomplishment and presented adjusted coefficient of determination of 0.372 (p<0.001). Conclusion: The fear of COVID-19 of health professionals in the continuous care of patients during COVID-19 pandemic in two cities in the Campo das Vertentes region in the state of Minas Gerais was related to depressive symptoms and as characteristics of the Burnout syndrome of emotional exhaustion, depersonalization and with low sense of personal accomplishment.

Avaliação ultrassonográfica de variações anatômicas entre vasos femorais realizada por estudantes de medicina / Ultrasonographic evaluation of anatomical variations in femoral vessels done by medical students

Introdução: A punção venosa central é um procedimento médico tradicionalmente realizado seguindo os marcadores anatômicos como referência para atingir o vaso, às cegas. No entanto, nem sempre o sucesso nessa técnica é alcançado, fato que se deve principalmente às variações anatômicas. A ultrassonografia point of care (US-POC) é utilizada para auxiliar a cateterização central por visualização direta do vaso, aumentando a segurança do procedimento. Objetivo: Avaliar a prevalência das variações anatômicas de vasos femorais através da utilização da US-POC por estudantes de medicina submetidos a curto período de treinamento. Material e Métodos: Cinco estudantes de medicina, sem experiência prévia em US-POC, foram submetidos a oito horas de treinamento teórico-prático. Foram avaliados os vasos femorais de cem voluntários. Resultados: A veia femoral direita foi encontrada mais frequentemente na posição medial (43%) em relação à artéria femoral direita. À esquerda, a posição posteromedial foi a mais observada (45%).Conclusão: A técnica tradicional de punção de acesso central se baseia em marcadores anatômicos e não leva em consideração as variações anatômicas existentes. Um treinamento de curto período para uso da US-POC é capaz de capacitar o profissional para reconhecer o posicionamento real dos vasos e evitar punções inadvertidas.

Introduction: Central vein puncture is a medical procedure traditionally done following anatomical landmarks as a reference to successfully achieving the vessel. However, this traditional technique is commonly unsuccessful due to anatomical variations that may be found. Point of care ultrasonography (POC-US) is used to assist central catheterization by directly visualizing the vessel, increasing procedure security and minimizing risks. Objective: Evaluate anatomical variations prevalence in femoral vessels, utilizing POC-US, done by medical students submitted to a short period of time training in ultrasonography. Material and Methods: Five medical students, without previous experience on the use of ultrasonography, were submitted to an eight-hour theorical practical training in POC-US. The students evaluated one hundred femoral vessels of volunteers. Results: The right limb femoral vein was found more frequently in the medial position (43%) in comparison to the right limb femoral artery. On the left limb, the posteromedial position was the most found (45%). Conclusion: The insertion of a central catheter following the traditional technique is based on anatomical landmarks, and does not take into account existing anatomical variations. With a short period of training, POC-US is capable of qualifying professionals to acknowledge the real location of the vessel and avoid inadvertent punctures and complications.

Exercise training during hemodialysis in Brazil: A national survey.

To evaluate the availability and characteristics of exercise training during hemodialysis in Brazil and to identify the reported barriers to exercise program implementation and maintenance. All dialysis units were assessed for eligibility using the database of the Brazilian Society of Nephrology. Each dialysis unit was contacted by telephone and the questions were administered. In dialysis units with exercise training, questions related to personnel involved, exercise components, and program delivery were included. Additionally, the barriers to exercise program implementation and maintenance were evaluated. This study included 261 dialysis units that responded to the survey. Forty-one dialysis units reported exercise training during hemodialysis in Brazil (prevalence of 15.7%). We identified 66 physiotherapists and 10 exercise physiologists in dialysis units with exercise training. Resistance training was the most common program component (92.7%). Hypotension (90.5%) and muscle cramps (85.7%) were the most common adverse events reported. In dialysis units with exercise training, poor patients' adherence to exercise was the most commonly reported barrier. The most prevalent barrier in dialysis units that tried or never tried to implement the exercise programs was a lack of resources. The number of dialysis units that have exercise training during hemodialysis in Brazil is low, and the most common program component is resistance training. A lack of resources was the most prevalent barrier in dialysis units that tried or never tried to implement the exercise programs.

Factors associated with fear of falling in hemodialysis patients.

PURPOSE: Fear of falling (FOF) has important clinical and psychological consequences. This study evaluated the factors associated with FOF in hemodialysis patients and compared with the FOF reported by age-gender matched individuals without chronic kidney disease. METHODS: This cross sectional study included hemodialysis group (n = 60, 55.4 ± 7.6 years, 55.0% male) and control group (n = 40, 55.1 ± 7.5 years, 52.5% male). FOF was assessed by the Falls Efficacy Scale International (FES-I). Physical function was evaluated using the Mini-Balance Evaluation Systems Test (Mini-BESTest), Timed Up and Go test, 4-m gait speed, isometric handgrip force and 10-repetition sit-to-stand test. The physical and mental components of quality of life was evaluated by 36-Item Short Form Health Survey. RESULTS: The FES-I score was higher in the hemodialysis group compared to the control group (28.2 ± 9.7 vs. 23.3 ± 5.1, p = 0.020). In addition, the prevalence of individuals with a higher concern about falling was greater in the hemodialysis group (41.7 vs. 17.5%, p = 0.033). Multiple linear regression showed that the FES-I score was associated with the Mini-BESTest score and the physical component summary of quality of life (coefficient of determination of 0.51 and an adjusted coefficient of determination of 0.46). CONCLUSION: FOF was associated with poor postural balance and reduced physical component of quality of life in patients on hemodialysis and these patients showed higher FOF compared to individuals without chronic kidney disease.

Factors Associated with Functional Capacity in CKD Patients.

To evaluate the factors associated with functional capacity in patients with chronic kidney disease (CKD). All patients were submitted to six-minute walk test (6MWT), 10-repetition sit-to-stand test (STS-10) and SF-36 health-related quality of life questionnaire (HRQoL). Patients with functional capacity ≥80% exhibited higher education level, family income, body mass index, estimated glomerular filtration rate, and lower age and STS-10 time. Multiple linear regression showed that gender, age, family income, chronic kidney disease stage, STS-10 time, and physical component summary of HRQoL were significantly associated with the 6MWT distance. Functional capacity was significantly associated with gender, age, family income, CKD stage, STS-10 time, and physical component of HRQoL. The progression of CKD has an impact on the decrease in functional capacity in these patients.

Avaliação do Escore de Wilson e do Teste de Mallampati modificado como preditores de difícil intubação orotraqueal: Estudo transversal / Evaluation of the Wilson risk-sum and the modified Mallampati Test as predictors of difficult orotracheal intubation: Cross-sectional study

INTRODUÇÃO: A consulta pré-anestésica é de extrema importância para o médico anestesiologista no planejamento do manejo das vias aéreas de pacientes sob o efeito de anestesia geral com intubação orotraqueal (IOT). OBJETIVO: Avaliar a sensibilidade, especificidade, valor preditivo positivo/negativo (VPP/VPN) de testes de predição de IOT difícil (Escore de Wilson - EW, e Teste de Mallampati modificado - TMM), em pacientes submetidos à anestesia geral, em hospital filantrópico do interior de Minas Gerais. MATERIAIS E MÉTODOS: Estudo descritivo transversal, por meio de fichas pré-anestésicas e transoperatórias, de pacientes submetidos à anestesia geral com IOT, entre os meses de janeiro (2019) e março (2020). RESULTADOS: Dos 440 pacientes, 56,1% necessitaram de IOT: média de idade de 49,9 anos (desvio padrão 18,6). A maioria foi classificada: TMM classe I e II; pontuação 0 a 2 no EW; distância esternomentoniana >12,5 cm, sugerindo IOT fácil. Apenas o TMM apresentou correlação com IOT difícil (p=0,045). Sensibilidade e especificidade dos testes respectivamente: TMM (54,6%;75,9%); EW (36,4% e 79,7%); baixo VPP (TMM: 9,5%; EW: 7,7%) e alto VPN (TMM: 97,3%; EW: 96,4%). Curva ROC: área sob a curva foi de TMM = 0,68; EW = 0,60. CONCLUSÃO: Apesar do TMM apresentar correlação significativa com a IOT difícil, não foi possível definir o melhor teste preditor. Ressaltamos que a sensibilidade e o VPP, de ambas as avaliações, ficaram abaixo daquilo que seria considerado adequado para um teste de rastreio e predição.

Introduction: A pre-anesthetic appointment is extremely important for the anesthesiologist when planning the management of the airways of patients under the effect of general anesthesia with orotracheal intubation (OTI). Objective: To evaluate the sensitivity, specificity, positive/ negative predictive value (PPV/NPV) of difficult OTI prediction tests (Wilson risk-sum ­ WRS, and Modified Mallampati Test - MMT) in patients undergoing general anesthesia in a philanthropic hospital in the countryside of the state of Minas Gerais. Materials and methods: Descriptive cross-sectional study using pre-anesthetic and transoperative records of patients submitted to general anesthesia with OTI between the months of January (2019) and March (2020). Results: Of the 440 patients, 56.1% required OTI: average age of 49.9 years (standard deviation 18.6). Most classified: MMT class I and II; score 0 to 2 on the WRS; sternomental distance greater than 12.5 cm, suggesting easy OTI. Only MMT showed statistical significance with difficult OTI (p=0.045). Sensitivity and specificity of the tests respectively: MMT (54.6%; 75.9%) WRS (36.4% and 79.7%) low PPV (MMT: 9.5%; WRS: 7.7%) and high NPV (MMT: 97.3%; WRS: 96.4%). ROC Curve: area under the curve was MMT = 0,68; WRS = 0,60. Conclusion: Although the MMT has a significant correlation with the difficult OTI, it was not possible to define the best predictor test. We emphasize that the sensitivity and PPV of both evaluations were below what would be considered adequate for a screening and prediction test.

Aplasia pura adquirida crônica da série vermelha secundária à quimioterapia em paciente com adenocarcinoma endometrioide invasivo / Chronic acquired pure aplasia of the red series secondary to chemotherapy in a patient with invasive endometrioid adenocarcinoma

O presente relato de caso descreve a apresentação atípica de uma paciente com adenocarcinoma endometrioide invasivo que evoluiu com aplasia pura adquirida crônica da série vermelha secundária à quimioterapia. Paciente de 71 anos, sexo feminino, procurou atendimento médico por quadro de metrorragia com três meses de evolução. A curetagem uterina evidenciou adenocarcinoma endometrioide invasor moderadamente diferenciado. Iniciou-se uma abordagem com esquema quimioterápico composto por Carboplatina e Paclitaxel interrompido ao quinto ciclo para evitar progressão de aplasia medular constatada por biópsia de medula óssea. A possível hematotoxicidade do protocolo Paclitaxel e Carboplatina foi observada na conduta terapêutica da paciente, por sua progressão para uma apresentação atípica de aplasia pura adquirida crônica da série vermelha após administração desta associação de drogas.

The present case report describes the atypical presentation of a patient with invasive endometrioid adenocarcinoma that evolved with chronic acquired pure aplasia of the red series secondary to chemotherapy. A seventy-one-yearold patient, female, sought medical care for a three-month-old metrorrhagia evolution. The uterine curettage showed moderately differentiated invasive endometrioid adenocarcinoma. It was initiated an approach with chemotherapy regimen consisting of Carboplatin and Paclitaxel interrupted at the fifth cycle to prevent progression of spinal aplasia found by bone marrow biopsy. The possible hematoxicity of the patient, for its progression to an atypical presentation of chronic acquired aplasia of the red series after administration of this combination of drugs.

Effect of low-level laser therapy on the inflammatory response in an experimental model of ventilator-induced lung injury.

The effect of low-level laser therapy (LLLT) on an experimental model of ventilator-induced lung injury (VILI) was evaluated in this study. 24 adult Wistar rats were randomized into four groups: protective mechanical ventilation (PMV), PMV + laser, VILI and VILI + laser. The animals of the PMV and VILI groups were ventilated with tidal volumes of 6 and 35 ml kg-1, respectively, for 90 minutes. After the first 60 minutes of ventilation, the animals in the laser groups were irradiated (808 nm, 100 mW power density, 20 J cm-2 energy density, continuous emission mode, and exposure time of 5 s) and after 30 minutes of irradiation, the animals were euthanized. Lung samples were removed for morphological analysis, bronchoalveolar lavage (BAL) and real time quantitative polynucleotide chain reaction (RT-qPCR). The VILI group showed a greater acute lung injury (ALI) score with an increase in neutrophil infiltration, higher neutrophil count in the BAL fluid and greater cytokine mRNA expression compared to the PMV groups (p < 0.05). The VILI + laser group when compared to the VILI group showed a lower ALI score (0.35 ± 0.08 vs. 0.54 ± 0.13, p < 0.05), alveolar neutrophil infiltration (7.00 ± 5.73 vs. 21.50 ± 9.52, p < 0.05), total cell count (1.90 ± 0.71 vs. 4.09 ± 0.96 × 105, p < 0.05) and neutrophil count in the BAL fluid (0.60 ± 0.37 vs. 2.28 ± 0.48 × 105, p < 0.05). Moreover, LLLT induced a decrease in pro-inflammatory and an increase of anti-inflammatory mRNA levels compared to the VILI group (p < 0.05). In conclusion, LLLT was found to reduce the inflammatory response in an experimental model of VILI.

Equilíbrio postural de pacientes em hemodiálise compara-dos a indivíduos sem doença renal crônica: estudo transver-sal / Postural balance in hemodialysis patients compared to individuals without chronic kidney disease: a cross-sectional study

Introdução: Pacientes com doença renal crônica (DRC) em hemodiálise (HD) apresentam fatores que contribuem para alterações no equilíbrio postural, aumentando o risco de quedas. Objetivo: Comparar o equilíbrio postural de pacientes em HD com indivíduos sem DRC, bem como verificar os fatores associados a alterações do equilíbrio postural nesses pacientes. Material e métodos: Foi realizado estudo transversal que incluiu um grupo de pacientes com DRC em Hemodiálise (GH) (n= 39, 55,1 ± 7,7 anos, 53,8% do gênero masculino) e um grupo controle (GC) com indivíduos sem DRC (n= 39, 55,3 ± 7,5 anos, 53,8% do gênero masculino). Os participantes foram submetidos a avaliações de equilíbrio postural (Mini Balance Evaluation Systems Test ­ Mini-BESTest), mobilidade funcional (Time Up and Go), velocidade de marcha (Gait Speed Measured over 4m), força muscular (preensão palmar e teste de sentar e levantar de 10 repetições) e qualidade de vida (36-Item Short Form Survey). Resultados: O GH apresentou pior equilíbrio postural avaliado pelo escore do Mini-BESTest [22 (3) vs. 24 (2); p<0,001] quando comparado ao GC. O equilíbrio postural nos pacientes em HD apresentou correlação significante com a velocidade de marcha (ρ= 0,381; p= 0,017) e a força muscular avaliada pelo teste de sentar e levantar (ρ= -0,358; p= 0,027). Na regressão linear múltipla foi observada associação do equilíbrio postural com a velocidade de marcha, sendo o coeficiente de determinação múltiplo de 0,291 e o coeficiente de determinação múltiplo ajustado de 0,231. Conclusão: Pacientes em HD apresentaram pior equilíbrio postural quando comparados a indivíduos sem DRC. O equilíbrio postural foi associado à velocidade de marcha nesses pacientes.

Introduction: Patients with chronic kidney disease (CKD) undergoing hemodialysis (HD) show several factors that contribute to postural balance impairment and higher risk of falls. Objective: To compare postural balance between HD patients and subjects without CKD, and to evaluate the factors associated with impairment of postural balance in these patients. Material and methods: A cross-sectional study was conducted, including a group of Hemodialysis patients (HG) (n= 39, 55.1 ± 7.7 years, 53.8% males) and a control group (CG) (n= 39, 55.3 ± 7.5 years, 53.8% male). Participants were submitted to the following evaluations: postural balance (Mini Balance Evaluation Systems Test - Mini-BESTest), functional mobility (Time Up and Go), gait speed (Gait Speed Measured over 4 m), muscle strength (handgrip and sit-to-stand test), and quality of life (36-Item Short Form Survey questionnaire). Results: The HG showed worse postural balance evaluated by Mini-BESTest score [22 (3) vs. 24 (2), p<0.001) when compared to CG. Postural balance was significantly correlated with gait speed (ρ= 0.381, p= 0.017) and muscle strength evaluated by the sit-to-stand test (ρ= -0.358, p<0.027). The linear regression showed an association between the postural balance and the gait speed. The multiple R-squared was 0.291 and the adjusted R-squared was 0.231. Conclusion: In the present study, HD patients showed worse postural balance when compared to the subjects without CKD. The postural balance was associated with gait speed in these patients.

Acute Lung Injury in Response to Intratracheal Instillation of Lipopolysaccharide in an Animal Model of Emphysema Induced by Elastase.

The response of lungs with emphysema to an acute lung injury (ALI) remains unclear. This study compared the lung response to intratracheal instillation of lipopolysaccharide (LPS) in rats with and without emphysema. Twenty-four Wistar rats were randomized to four groups: control group (C-G), ALI group (ALI-G), emphysema group (E-G), emphysema and ALI group (E-ALI-G). Euthanasia and the following analysis were performed 24 h after ALI induction: lung histology, bronchoalveolar lavage (BAL), mRNA expression of inflammatory mediators, and blood gas measures. The histological analysis showed that animals of ALI-G (0.55 ± 0.15) and E-ALI-G (0.69 ± 0.08) had a higher ALI score compared to C-G (0.12 ± 0.04) and E-G (0.16 ± 0.04) (p < 0.05). The analysis of each component of the score demonstrated that ALI-G and E-ALI-G had greater alveolar and interstitial neutrophil infiltration, as well as greater amount of alveolar proteinaceous debris. Comparing the two groups that received LPS, there was a trend of higher ALI in the E-ALI-G, specially due to a higher neutrophil infiltration in the alveolar spaces and a higher septal thickening. Total cell count (E-G = 3.09 ± 0.83; ALI-G = 4.45 ± 1.9; E-ALI-G = 5.9 ± 2.1; C-G = 0.73 ± 0.37 × 105) and neutrophil count (E-G = 0.69 ± 0.35; ALI-G = 2.53 ± 1.09; E-ALI-G = 3.86 ± 1.4; C-G = 0.09 ± 0.07 × 105) in the BAL were higher in the groups E-G, ALI-G, and E-ALI-G when compared to C-G (p < 0.05). The IL-6, TNF-α, and CXCL2 mRNA expressions were higher in the animals that received LPS (ALI-G and E-ALI-G) compared to the C-G and E-G (p < 0.05). No statistically significant difference was observed in the BAL cellularity and in the expression of inflammatory mediators between the ALI-G and the E-ALI-G. The severity of ALI in response to intratracheal instillation of LPS did not show difference in rats with and without intratracheal-induced emphysema.

Atraso vacinal no município de Barbacena (MG): contextualizando o problema / Vaccine delay in the municipality of Barbacena (MG): contextualizing the problem

Introdução: O Programa Nacional de Imunizações (PNI) visa controlar ou erradicar doenças infectocontagiosas através de coberturas vacinais. Entretanto, há fatores que dificultam a vacinação. Este estudo procurou avaliar quais vacinas apresentaram maior atraso entre crianças de 0-5 anos incompletos e os principais motivos desses atrasos, bem como os dados socioeconômicos das respectivas mães nos três principais postos de saúde de Barbacena nos dias "D" das campanhas nacionais. Materiais e métodos: Estudo de corte transversal referente às crianças com atraso vacinal durante os dias "D" das campanhas nacionais contra poliomielite realizadas em 2014 e 2015. Os critérios de exclusão foram a não aceitação em participar da pesquisa, crianças com idade fora da faixa etária do estudo e aquelas que não apresentaram cartão. Resultados: Foram encontradas 112 crianças com atraso. Quando avaliadas as vacinas, notou-se que a prevalência de atraso foi da DTP-48 meses e da triviral-15 meses. Quanto aos motivos, destacaram-se presença de sintomas, desconhecimento e esquecimento. Orientação profissional e falta de vacina no posto também tiveram relevância. Conclusão: Foram encontrados atrasos na maioria das vacinas. Motivos que merecem destaque são a orientação profissional e falta de vacina. Provavelmente, o problema foi a falta de informação adequada. Entretanto, é necessário expandir o estudo.

Introduction: The National Immunization Program (NIP) aims to control or eradicate infectious diseases through vaccination coverage. However, there are factors that influence vaccination. Objectives: To assess which vaccines presented higher delay among children between 0-5 years of age and the main reasons for these delays, as well as to evaluate the socioeconomic data of their mothers at the three main health posts of the city of Barbacena on the "D" days of the national immunization campaigns. Materials and methods: Cross-sectional study of children with delayed immunization on the "D" days of the national immunization campaigns against polio conducted in 2014 and 2015. The exclusion criteria were: refusal in taking part in the research, children whose age was not in the age range of the study, and those who did not have their vaccination cards. Results: 112 children had at least one vaccination delay. Regarding the vaccines, it was noted that the prevalence delay was in the DTP at 48 months and in the MMR at 15 months. The reasons given for this delay were the presence of symptoms, unawareness, and oblivion. Professional guidance and shortage of vaccine at the post also had relevance. Conclusion: Delays were found in most vaccines. The reasons worth mentioning are professional guidance and shortage of vaccine. The problem was likely due to the lack of adequate information. However, it is necessary to expand the study.