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INTRODUCTION: Helicopter pilots may present chronic low back pain due to vibration exposure and asymmetric posture during flight. OBJECTIVES: To analyze the effects of a Pilates-based exercise program on low back pain of helicopter pilots of the Brazilian Air Force. METHODS: This is a randomized controlled trial with fifteen helicopter pilots of the Brazilian Air Force, who were assessed for pain intensity (Numerical Pain Rating Scale), disability associated with low back pain, and spine muscle endurance in three positions: trunk extension (Ito test) and left and right lateral bridge. Individuals were randomly distributed into the regular exercises group (REG) (n = 7), oriented to maintain their exercise routine, and Pilates group (PG) (n = 8), which performed an exercise program based on Pilates method twice a week for 12 weeks. Reassessments occurred after 6 and 12 weeks. Data were analyzed on SPSS 20.0 software using a significance level of 5%. RESULTS: PG showed a significant reduction in low back pain after 12 weeks of training compared with REG (mean difference of 3.5 points, p < 0.0001). We also observed increased endurance of trunk extensors (p = 0.002) and right (p = 0.001) and left lateral muscles (p = 0.001) in the PG compared with REG. However, the indexes of disability did not change between groups. CONCLUSION: Pain intensity was significantly reduced while spine muscle endurance increased in PG compared with REG after intervention; thus, Pilates-based exercises should be considered in physical conditioning programs for helicopter pilots.

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INTRODUCTION: Fighter pilots must support the effects of many stressors, including physical and psychological exertion, circadian disturbance, jet lag, and environmental stress. Despite the rigorous selection of military pilots, those factors predispose to failures in physiological compensatory mechanisms and metabolic flexibility. OBJECTIVES: We compared through NMR-based metabolomics the metabolic profile of Brazilian F5 fighter pilots with different flight experiences vs. the control group of non-pilots. We hypothesized that combat pilots have metabolic flexibility associated with combat flight time. METHODS: We evaluated for the first time 34 Brazilian fighter pilots from Santa Cruz Air Base (Rio de Janeiro, RJ) allocated into three groups: pilots with lower total accumulated flight experience < 1,100 h (PC1, n = 7); pilots with higher total accumulated flight experience ≥ 1,100 h (PC2, n = 6); military non-pilots (CONT, n = 21). Data collection included anthropometric measurements, total blood count, lipidogram, markers of oxidative stress, and serum NMR-based metabolomics. RESULTS: In comparison with controls (p < 0.05), pilots exhibited decreased levels of white blood cells (-13%), neutrophils (-15%), lymphocytes (-20%), alfa-glucose (-13%), lactate (-26%), glutamine (-11%), histidine (-20%), and tyrosine (-11%), but higher isobutyrate (+ 10%) concentrations. Significant correlations were found between lactate vs. amino acids in CONT (r = 0.55-0.68, p < 0.001), and vs. glutamine in PC2 (r = 0.94, p = 0.01). CONCLUSION: Fighter pilots with lower experience showed a dysregulation in immune-metabolic function in comparison with controls, which seemed to be counteracted by the accumulation of flight hours. Those findings might have implications for the health preservation and operational training of fighter pilots.

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AIMS: To isolate and characterize non-rhizobial nodule-associated bacteria (NAB) from cowpea root-nodules regarding their performance of plant-growth-promoting mechanisms and their ability to enhance cowpea growth and symbiosis when co-inoculated with bradyrhizobia. METHODS AND RESULTS: Sixteen NAB were isolated, identified, and in vitro evaluated for plant growth promotion traits. The ability to promote cowpea growth was analyzed when co-inoculated with Bradyrhizobium pachyrhizi BR 3262 in sterile and non-sterile substrates. The 16S rRNA gene sequences analysis revealed that NAB belonged to the genera Chryseobacterium (4), Bacillus (3), Microbacterium (3), Agrobacterium (1), Escherichia (1), Delftia (1), Pelomonas (1), Sphingomonas (1), and Staphylococcus (1). All strains produced different amounts of auxin siderophores and formed biofilms. Twelve out of the 16 strains carried the nifH, a gene associated with nitrogen fixation. Co-inoculation of NAB (ESA 424 and ESA 29) with Bradyrhizobium pachyrhizi BR 3262 significantly promoted cowpea growth, especially after simultaneous inoculation with the three strains. CONCLUSIONS: NAB are efficient cowpea growth promoters and can improve the efficiency of the symbiosis between cowpea and the N2-fixing microsymbiont B. pachyrhizi BR 3262, mainly under a specific triple microbial association.

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Fighter pilots (FP) are exposed to flight accelerations and stressful situations that defy cardiovascular control during and after flight. FP presents a smaller adjustment in sympatho-vagal balance during tilt test after flight compared to baseline, suggesting a huge impact of flight on autonomic modulation to the heart. We undertake to test the hypothesis that FP will have a smaller vagal reentrance and lower sympathetic withdrawal during the recovery at the supine position after a prolonged active standing test that mimics flight hemodynamic demands. Twenty-one military personnel (20-34 years old), composed of 9 FP and 12 non-pilots (NP) matched by age, V̉O2max and body mass index were enroled in the experimental protocol. R-R intervals were continuously recorded in the supine position for 15 min (SUPbaseline ), during the prolonged active standing test (45 min) windowed in six 5 min time frames (from ORT1 to ORT6), and a recovery period in the supine position for 15 min (SUPrecovery ). Heart rate variability was performed by spectral analysis to obtain the normalized low (LFn) and high (HFn) frequency components. The variation (Δ) from baseline (Δ = ORT6 - SUPbaseline ) and from recovery (Δ = SUPrecovery -ORT6) periods were calculated. FP had a smaller ΔLFn (sympathetic mediated) and ΔHFn (vagal meditated) during recovery after active standing as compared to NP. Both groups showed similar changes in ΔLFn and ΔHFn during orthostatic stress compared to baseline, with no differences over time. Therefore, FP show a smaller vagal reentrance and a lower sympathetic reduction during recovery at supine following active standing compared to NP.

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Introducción: se ha estudiado ampliamente la importancia de los cambios de presión y sus consecuencias en el cuerpo humano. De esto se desprenden dos conceptos importantes: el barotrauma que se define como el daño producido por cambios en la presión atmosférica; y la barodontalgia que se define como el dolor dentario producido por variaciones de presión barométrica, por ejemplo cuando existen gases atrapados en restauraciones o en la cámara pulpar y/o conducto radicular. Estos conceptos se fundamentan en las leyes de los gases: la Ley de Difusión Gaseosa, la Ley de Dalton, la Ley de Boyle, la Ley de Charles y la Ley de Henry. Discusión: el estudio y prevención de la barodontalgia es de suma importancia, ya que aunque no tiene alta prevalencia entre los aviadores, su aparición es súbita y de alta intensidad, lo que puede provocar en el piloto una incapacidad física y mental, que aumenta el riesgo de accidentes. Conclusiones: en esta revisión, se reúnen las estrategias recomendadas para prevenir su aparición.

Introduction: the importance of pressure changes and their consequences on the human body has been widely studied. Two important concepts arise from this: barotrauma, which is defined as the damage produced by changes in atmospheric pressure; and barodontalgia, which is defined as dental pain produced by variations in barometric pressure, for example when gases are trapped in restorations or in the pulp chamber and/or root canal. These concepts are based on the gas laws: the Law of Gaseous Diffusion, Dalton's Law, Boyle's Law, Charles' Law and Henry's Law. Discusion: the study and prevention of barodontalgia is of utmost importance, since although it is not highly prevalent among aviators, its onset is sudden and of high intensity, which can cause physical and mental incapacity in the pilot, increasing the risk of accidents. Conclusions: this review brings together the recommended strategies to prevent its occurrence.

Introducão: a importância das mudanças de pressão e suas conseqüências sobre o corpo humano têm sido amplamente estudadas. Dois conceitos importantes podem ser derivados disto: barotrauma, que é definido como o dano produzido por mudanças na pressão atmosférica; e barodontalgia, que é definida como a dor dental produzida por variações na pressão barométrica, por exemplo, quando os gases estão presos em restaurações ou na câmara de polpa e/ou canal radicular. Estes conceitos são baseados nas leis do gás: a Lei de Difusão Gasosa, a Lei de Dalton, a Lei de Boyle, a Lei de Charles e a Lei de Henry. Discusion: o estudo e prevenção da barodontia é de suma importância, pois embora não seja muito prevalente entre os aviadores, seu início é repentino e de alta intensidade, o que pode causar incapacidade física e mental no piloto, aumentando o risco de acidentes. Conclusões: esta revisão reúne as estratégias recomendadas para evitar sua ocorrência.

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INTRODUCTION: Low back pain in military pilots is a frequent condition which constantly leads to absences from work, decreased concentration and performance during flight, as well as changes in work functions. METHODS: This is a cross-sectional analytical study including 28 fighter pilots who underwent an evaluation comprising muscle strength and fatigue resistance, trunk mobility and application of questionnaires to identify associated clinical factors. RESULTS: It was observed that 68% of the pilots reported low back pain with an average pain intensity of 3.7 at numerical pain scale in the last week. No significant differences were observed regarding the range of motion and trunk muscle strength when pilots with low back pain were compared with asymptomatic pilots. However, lateral right trunk muscle (mean difference=16, 95% CI 0.6 to 33.0]) and lateral left trunk muscle (mean difference=22, 95% CI 1 to 44) fatigue sooner in pilots with low back pain when the two groups were compared (p=0.04 for both). CONCLUSION: There was a high rate of low back pain complaints among fighter pilots. There was also a significant reduction in fatigue resistance of the lateral trunk muscles in symptomatic pilots when compared with asymptomatic pilots. These factors must be considered in the physical training of this population.

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Introdução: Pilotar uma aeronave é uma atividade que requer um conjunto de habilidades especializadas. Existem muitos procedimentos padronizados, porém é necessário também fazer julgamentos na presença de incertezas, considerando os riscos e tomando decisões de maneira rápida e prudente. A atividade de um piloto de linha aérea se desenvolve em um sistema complexo, com múltiplas interações. Para tanto, necessita ter capacidade de reconhecer padrões de interação e saber o que fazer em situações imprevisíveis. Diante das imprevisibilidades é importante compreender quais são os recursos e estratégias utilizados para lidar com os eventos. Objetivo: Esta tese tem como objetivo analisar quais são os fatores determinantes da tomada de decisão bem-sucedida de pilotos de linha aérea em situação não prescritas de trabalho e considerando o modelo de decisão utilizado e os aspectos cognitivos envolvidos. Métodos: Foram estudados pilotos de linha aérea que vivenciaram durante a atividade um evento crítico, onde não havia procedimentos previstos ou regras convencionadas. Para compreender as estratégias foram entrevistados 10 pilotos de linha aérea. As entrevistas semiestruturadas seguiram a metodologia da Análise Cognitiva da Tarefa. Posteriormente as informações de 12 eventos relatados foram analisadas e classificadas segundo a taxonomia Schema World Action Research Method (SWARM). A metodologia adotada para a análise de decisão empregada na pesquisa serve para ampliar a capacidade de organizar estratégias de conhecimento dos pilotos de linha área, fazendo com que possam avaliar e responder às situações não prescritas durante o voo de forma mais rápida e segura. Resultados: Observamos que existe pressão de tempo nas decisões, em situações nas quais as interações são complexas. Nestes casos, as consequências das decisões podem ser graves para o decisor. Essas são tomadas com base na experiência e nos processos de decisão naturalista. Os processos de treinamento convencionais foram reconhecidos como fatores que contribuíram para as decisões em eventos críticos. A compreensão dos processos envolvidos na decisão naturalista pode enriquecer as possibilidades de aprendizagem e melhorar a segurança da operação aérea. Conclusão: o estudo permitiu verificar que a compreensão dos processos de decisão naturalista em situações não prescritas pelas regras, foi um fator preditivo para a segurança de voo.

Introduction: Flying an aircraft is an activity that requires a set of specialized skills. There are many standardized procedures, but it is also necessary to make judgments in the presence of uncertainties, considering the risks and making decisions quickly and prudently. The activity of an airline pilot develops in a complex system, with multiple interactions, therefore, he/she needs to be able to recognize interaction patterns and know what to do in unpredictable situations. Faced with unpredictability, it is important to understand the resources and strategies used to deal with events. Objective: This thesis aims to analyze what are the determining factors of successful decision-making by airline pilots in non-prescribed work situations, considering the decision model used and the cognitive aspects involved. Methods: Airline pilots who experienced a critical event during the activity, where there were no procedures or agreed rules, were studied. To understand the strategies, 10 airline pilots were interviewed, the semistructured interviews followed the Cognitive Task Analysis methodology. Later the information from 12 reported events were analyzed and classified using the Schema World Action Research Method (SWARM) taxonomy. The methodology adopted for the decision analysis used in the research serves to expand the ability to organize knowledge strategies of the airline pilots, making them able to evaluate and respond to non-prescribed situations during the flight in a faster and safer way. Results: We observed that there is time pressure on decisions, in scenarios where interactions are complex. In these cases, the consequences of the decisions can be serious for the decision maker. Those are taken on the basis of experience and naturalistic decision processes. Conventional training processes were recognized as factors that contributed to decisions in critical events. Understanding the processes involved in the naturalistic decision can enrich the learning possibilities and improve the safety of the air operations. Conclusion: The study made it possible to verify that the understanding of naturalistic decision processes in scenarios not formal prescribed by the rules is a predictive factor for flight safety.

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Distúrbios do sono e as alterações do estado de humor, quando não tratados, estão associados à perda de produtividade e acidentes de trabalho, resultando em lesões e fatalidade. Esses distúrbios são subdiagnosticados e subtratados em contextos clínicos, porque podem ser assintomáticos e o exame de polissonografia tem custo elevado. Por isso, questionários são usados para realizar uma triagem e detectar profissionais com alto risco de síndrome da apneia obstrutiva do sono, de sonolência diurna excessiva e fadiga. Este estudo teve como objetivo aplicar questionários validados para triagem dos distúrbios do sono e do humor em pilotos civis e analisar os resultados obtidos com a aplicação desses instrumentos. Foram coletados dados de 44 pilotos civis por meio de quatro instrumentos: um questionário para a caracterização sociodemográfica e ocupacional da amostra, a Escala de Sonolência de Epworth para avaliar a presença de sonolência diurna excessiva, o Questionário de Berlim para avaliar a Síndrome da Apneia Obstrutiva do Sono e a Escala de Humor de Brunel para avaliar o estado de humor. A Escala de Sonolência de Epworth mostrou que 25% dos pilotos apresentaram pontuação para sonolência diurna excessiva. De acordo com o Questionário de Berlim, 29,5% apresentaram alto risco para a Síndrome da Apneia Obstrutiva do Sono e pela Escala de Humor de Brunel, o domínio vigor, teve a média mais alta (5,09 ±4,06). Portanto, a utilização dos questionários nos exames de admissão e nos periódicos, pode auxiliar na identificação precoce e no monitoramento de distúrbios do sono e dos estados de humor ao longo do tempo em pilotos civis, priorizando aqueles que deverão ser encaminhados para realizarem estudos do sono.

Sleep disorders and mood state changes, when untreated, are associated with loss of productivity and accidents at work, resulting in injuries and fatality. These disorders are underdiagnosed and undertreated in clinical contexts due to them being asymptomatic and the prohibitive cost of polysomnography exams. For this reason, questionnaires are used to screen and detect professionals at high risk for obstructive sleep apnea syndrome, excessive daytime sleepiness, and fatigue. This study aimed at applying validated questionnaires for screening sleep and mood disorders in civilian pilots and analyzing the results obtained with the application of these instruments. Data were collected from 44 civilian pilots using four instruments: a questionnaire for sociodemographic and occupational characterization of the sample; the Epworth Sleepiness Scale to assess the presence of excessive daytime sleepiness; the Berlin Questionnaire to assess Obstructive Sleep Apnea Syndrome; and the Brunel Mood Scale to assess the mood state. The Epworth Sleepiness Scale showed that 25% of the pilots presented scores for excessive daytime sleepiness. According to the Berlin Questionnaire, 29.5% were at high risk for Obstructive Sleep Apnea Syndrome, and according to the Brunel Mood Scale, the vigor domain presented the highest mean (5.09 ± 4.06). Therefore, the use of questionnaires in admission and periodic exams can assist in the early identification and monitoring of sleep disorders and mood states over time in civilian pilots, prioritizing those who should be referred to sleep studies.

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ABSTRACT Introduction Hypertension is a common clinical disease, which is not uncommon in the aviation industry. Pilots suffering from high blood pressure need to control high blood pressure to ensure flight safety. Exercise therapy is an effective way to control high blood pressure. Objective To design the clinical effects of exercise intervention in the treatment of hypertension in pilots. Method The article randomly assigned 41 pilot volunteers with hypertension to two groups: the treatment and control groups. Except for the different exercise intervention therapy, the other treatment methods are the same. After the expiration of the experiment, the volunteers were tested for their physiological and biochemical indicators. Results After one year of strict diet and exercise intervention, the two groups of physiological and biochemical indicators were significantly different. Conclusion Intervention of moderate-intensity exercise can reduce the body mass index, waist-to-hip ratio and blood pressure level of hypertensive patients, correct the disorder of blood lipid metabolism, and can help reduce the recurrence rate of hypertension. Level of evidence II; Therapeutic studies - investigation of treatment results.

RESUMO Introdução A hipertensão é uma doença clínica comum, o que não é incomum na indústria de aviação. Os pilotos que sofrem de pressão alta precisam controlar a pressão alta para garantir a segurança do vôo. A terapia com exercícios é uma forma eficaz de controlar a hipertensão. Objetivo Desenhar os efeitos clínicos da intervenção com exercícios no tratamento da hipertensão em pilotos. Método O artigo distribuiu aleatoriamente 41 voluntários pilotos com hipertensão em dois grupos: os grupos de tratamento e controle. Exceto pela terapia de intervenção com exercícios diferentes, os outros métodos de tratamento são os mesmos. Após o término do experimento, os voluntários foram testados quanto aos seus indicadores fisiológicos e bioquímicos. Resultados Após um ano de dieta estrita e intervenção com exercícios, os dois grupos de indicadores fisiológicos e bioquímicos foram significativamente diferentes. Conclusão A intervenção de exercícios de intensidade moderada pode reduzir o índice de massa corporal, a relação cintura-quadril e o nível de pressão arterial de pacientes hipertensos, corrigir o distúrbio do metabolismo dos lipídios do sangue e pode ajudar a reduzir a taxa de recorrência da hipertensão. Nível de evidência II; Estudos terapêuticos - investigação dos resultados do tratamento.

RESUMEN Introducción La hipertensión es una enfermedad clínica común, que no es infrecuente en la industria de la aviación. Los pilotos que sufren de presión arterial alta necesitan controlar la presión arterial alta para garantizar la seguridad del vuelo. La terapia con ejercicios es una forma eficaz de controlar la presión arterial alta. Objetivo Diseñar los efectos clínicos de la intervención con ejercicios en el tratamiento de la hipertensión en pilotos. Método El artículo asignó al azar a 41 voluntarios piloto con hipertensión a dos grupos: el de tratamiento y el de control. Excepto por las diferentes terapias de intervención con ejercicios, los otros métodos de tratamiento son los mismos. Después de la terminación del experimento, se evaluó a los voluntarios en cuanto a sus indicadores fisiológicos y bioquímicos. Resultados Después de un año de estricta intervención de dieta y ejercicio, los dos grupos de indicadores fisiológicos y bioquímicos fueron significativamente diferentes. Conclusión La intervención del ejercicio de intensidad moderada puede reducir el índice de masa corporal, la relación cintura-cadera y el nivel de presión arterial de los pacientes hipertensos, corregir el trastorno del metabolismo de los lípidos en sangre y puede ayudar a reducir la tasa de recurrencia de la hipertensión. Nivel de evidencia II; Estudios terapéuticos: investigación de los resultados del tratamiento.

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Understanding decision-making in complex and dynamic environments is relevant for designing strategies targeting safety improvements and error rate reductions. However, studies evaluating brain dynamics in realistic situations are scarce in the literature. Given the evidence that specific microstates may be associated with perception and attention, in this work we explored for the first time the application of the microstate model in an ecological, dynamic and complex scenario. More specifically, we evaluated elite helicopter pilots during engine-failure missions in the vicinity of the so called "dead man's curve," which establishes the operational limits for a safe landing after the execution of a recovery maneuver (autorotation). Pilots from the Brazilian Air Force flew a AS-350 helicopter in a certified aerodrome and physiological sensor data were synchronized with the aircraft's flight test instrumentation. We assessed these neural correlates during maneuver execution, by comparing their modulations and source reconstructed activity with baseline epochs before and after flights. We show that the topographies of our microstate templates with 4, 5, and 6 classes resemble the literature, and that a distinct modulation characterizes decision-making intervals. Moreover, the source reconstruction result points to a differential activity in the medial prefrontal cortex, which is associated to emotional regulation circuits in the brain. Our results suggest that microstates are promising neural correlates to evaluate realistic situations, even in a challenging and intrinsically noisy environment. Furthermore, it strengthens their usage and expands their application for studying cognition under more realistic conditions.

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OBJECTIVES: The aims of this study were to investigate auditory habits and binaural interaction among pilot and non-pilot military personnel from the Brazilian Air Force. DESIGN: A cross-sectional study using (1) an auditory habits questionnaire to outline the groups auditory profile and (2) the masking level difference test (MLD, Auditec, Saint Louis®) to evaluate and compare the groups. STUDY SAMPLE: Forty military male personnel aged between 30-40 years old, all with normal hearing, comprising 20 pilots in the study group (SG), and 20 non-pilots, not exposed to noise, in the control group (CG). RESULTS: There was no significant difference between groups regarding auditory habits. In the MLD test, a significantly better performance under the homophasic condition (S0N0) was found in the SG. Under the antiphasic condition (SπN0) there were no differences between groups. This combination resulted in a significantly lower MLD in the SG compared to the CG. CONCLUSIONS: Repeated exposure to conditions where active pilots have to learn to recognise speech in noisy backgrounds may lead to a better performance in the MLD's homophasic condition (S0N0).

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O presente estudo objetivou analisar a segurança do paciente no cotidiano de trabalho da equipe multiprofissional do transporte aeromédico inter-hospitalar (TAI). Trata-se de um estudo de caso qualitativo, que utilizou o referencial teórico de Michel de Certeau, realizado em uma empresa de transporte aéreo inter-hospitalar na cidade de Belo Horizonte, Minas Gerais. Foram incluídos na pesquisa os profissionais que atuavam com mais de um ano em TAI, sendo 35 profissionais entrevistados: 12 (34,29%) enfermeiros; 14 (40%) médicos; e 9 (25,71%) pilotos. Sendo excluídos os profissionais que possuíam menos de ano de atuação. A coleta de dados foi realizada em por meio de entrevistas individuais guiadas por meio de um roteiro semiestruturado, no período de agosto a setembro de 2019. O estudo foi aprovado pelo Comitê de Ética e Pesquisa da UFMG (COEP/UFMG), sob Parecer nº: 3.368.996. As entrevistas foram agendadas, realizada em ambiente privativo após esclarecimento da pesquisa mediante o termo de consentimento livre esclarecido (TCLE). Após a gravação na íntegra, foram transcritas e submetidas à Análise de Conteúdo Temática e Análise Documental dos prontuários dos pacientes transportados de 2012 a 2017. Os resultados foram organizados em quatro categorias temáticas: os sujeitos da pesquisa e o perfil de atendimentos no TAI; o ambiente de voo e o fazer da equipe multidisciplinar; o controle e a imprevisibilidade no TAI: estratégias e táticas no cotidiano de trabalho; e os elementos que configuram o contexto do TAI. Os resultados mostraram que os atendimentos são, na sua maioria, de pacientes do sexo masculino e portadores de doenças cardiovasculares, neurológicos e trauma. O trabalho é dinâmico, imprevisível em ambiente restrito. No cotidiano, prevalecem às normas das áreas da saúde e da aviação, enfocando os riscos nas duas áreas e o rigor adotado no TAI. Conclui-se que, os profissionais adotam novas maneiras de fazer para tornar o ambiente seguro e as circunstâncias de risco podem ser mitigadas pela equipe.

The presente study aimed to analyze patient safety in the daily work of a multidisciplinar team of inter-hospital air medical transport (TAI). This is a qualitative case study, which used the theoretical framework of Michel de Certeau and it was carried out in an inter-hospital air transport company in Belo Horizonte, Minas Gerais. This study enrolled 35 professionals who had worked for more than one year in TAI: 12 nurses (34.29%); 14 physicians (40%); and 9 pilots (25.71%). Professionals who had less than one year of work were excluded. Data collection occurred between August and September 2019, and was obtained through individual interviews guided by a semi-structured script. This study was approved by the Ethics and Research Committee of UFMG (COEP/UFMG - No.: 3.368.996). Interviews were scheduled and held in a private environment after research explanation and signing of the free informed consent term (TCLE). After being recorded in full, the interviews were transcribed and submitted to Thematic Content Analysis and Document Analysis of the medical records of patients transported from 2012 to 2017. Results were organized into four thematic categories: the research subjects and the profile of assistance in TAI; the flight environment and the role of the multidisciplinary team; control and unpredictability in TAI; strategies and tactics in daily work; and the elements that configure the TAI context. Our results showed that the assistances are mostly for male patients and patients with cardiovascular, neurological and trauma diseases. We also observed that working in inter-hospital medical transport is dynamic and unpredictable in a restricted environment. In a daily basis, health and aviation standards prevail, focusing on the risks in both areas and the rigor adopted at work. We concluded that professionals adopt new ways to make the environment safe and that risky circumstances can be mitigated by the team.

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Abstract Objective Compare by mechanical tests the pullout resistance and the insertion torque of rough and smooth pedicle screws. Methods Pedicle screws with rough surface and smooth surface, with diameters of 4.8; 5.5 and 6.5 mm, were inserted in polyurethane blocks with density of 10 PCF (0.16 g/cm3). Insertion torque and pullout strength were assessed. Results The pullout strength of the rough surface and smooth surface screws did not differ, except in the group of 4.8 mm diameter screws. In this group, the rough surface screws showed greater resistance to pullout. Conclusion Pedicle screws with a rough surface did not show increased pullout resistance in the acute phase of their insertion in polyurethane blocks compared to smooth surface screws. The rough surface screws had a higher insertion torque than the smooth surface screws, depending on the diameter of the screw and the preparation of the pilot hole.

Resumo Objetivo Comparar por testes mecânicos a resistência ao arrancamento e o torque de inserção do parafuso pedicularjateado e liso. Métodos Parafusos pediculares de superfície áspera e de superfície lisa com diâmetros de 4,8; 5,5 e 6,5 mm foram inseridos em blocos de poliuretano com densidade de 10 PCF (0,16 g/cm3). O torque de inserção e a força de arrancamento foram avaliados. Resultados A força de arrancamento dos parafusos de superfície áspera e de superfície lisa não diferiu, exceto no grupo de parafusos com 4,8 mm de diâmetro. Nesse grupo, os parafusos de superfície áspera apresentaram maior resistência ao arrancamento. Conclusão Os parafusos pediculares de superfície áspera não apresentaram aumento da resistência ao arrancamento na fase aguda de sua inserção em blocos de poliuretano em relação aos parafusos de superfície lisa. Os parafusos de superfície áspera apresentaram maior torque de inserção que os parafusos de superfície lisa, dependendo do diâmetro do parafuso e da preparação do furo piloto.

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Resumen Introducción: el presente estudio tuvo como fin investigar la efectividad clínica de dos presentaciones de esomeprazol en pacientes con dispepsia de causa no estudiada. Métodos: se realizó un ensayo clínico piloto de dos presentaciones de esomeprazol de 40 mg recibidos diariamente por 28 días. Se eligieron pacientes con diagnóstico de dispepsia no estudiada que asistieron a consulta de gastroenterología en un hospital de referencia. Se evaluaron a los pacientes inicialmente con endoscopia y biopsia, el seguimiento a 2 y 4 semanas con escalas clínicas de síntomas y calidad de vida con cuestionarios validados en español (SODA y QoL-PEI) y eventos adversos. Además, se midieron los niveles de pH gástrico con pH-metrías en 24 horas al día 14 de tratamiento. Se tomaron niveles séricos del medicamento al momento de la evaluación de la pH-metría. Para las escalas clínicas se aplicó un análisis de varianza (ANOVA) de dos factores con medidas repetidas y al encontrar diferencias significativas en los tiempos se realizó una corrección de Bonferroni. Resultados: se aleatorizó un total de 33 pacientes, 16 y 17 pacientes en cada grupo. No hubo diferencias en el porcentaje de inhibición del pH gástrico al día 14 de tratamiento (p = 0,9795). No hubo diferencias en concentraciones de niveles séricos el día 14 (p = 0,2199). No se encontraron diferencias significativas en las escalas de gravedad y calidad de vida en las dos primeras semanas de tratamiento, pero sí en las últimas dos semanas, en las cuales el producto de prueba demostró mayor disminución del dolor (p = 0,0048) y superioridad en conformidad (p = 0,01) en la subescala SODA. No se presentaron eventos adversos serios y no hubo diferencias estadísticas entre la presentación eventos adversos no serios. Conclusiones: los productos de prueba y el de referencia mostraron efectos similares en variables clínicamente relevantes.

Abstract Introduction: This pilot studied the clinical effectiveness of two presentations of esomeprazole in patients with dyspepsia with undiagnosed causes. Methods: We conducted a pilot clinical trial of two 40 mg Esomeprazole presentations. Patients with dyspepsia of unknown cause at a gastroenterology clinic in a referral hospital were included. They received one or the other presentation daily for 28 days. Patients were initially evaluated with endoscopy and biopsy and received follow-up examinations at two and four weeks. Adverse events were recorded, and clinical symptom scales and quality of life questionnaires validated in Spanish (SODA and QoL-PEI) were used. In addition, gastric pH levels were measured continuously for 24 hours on day 14 of treatment. Serum levels of the medication administered were also measured on day 14 of treatment. A two-way repeated measures ANOVA was used to compare mean differences between the two groups. When significant differences in times were found, a Bonferroni correction was made. Results: A total of 33 patients were randomized into two groups: 16 patients in one group and 17 in the other. There were no differences in the percentages of gastric pH inhibition at day 14 of treatment (p = 0.9795). There were no differences in serum level concentrations on day 14 (p = 0.2199). No significant differences were found in severity and quality of life scales in the first two weeks of treatment. However, in the last two weeks of treatment the test product showed a larger decrease in pain (p = 0.0048) and superiority in compliance (p = 0.01) on the SODA subscale. There were no serious adverse events, and there were no statistical differences between the presentations of non-serious adverse events. Conclusions: The Test product and the Reference product showed similar effects on clinically relevant variables.

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Although digital photos have the potential to improve the precision of reported portions in dietary assessment, there are few studies investigating its accuracy in comparison to printed photos. The aim of this study was to evaluate the perception of adults in quantifying food portion sizes using printed and digital photos, displayed on computer-screens and tablets. In total, 1165 evaluations were performed for 60 photos of portion sizes in Brazil. Each participant (n = 58) attended two sessions in the study center, with an interval of at least one week. In each session, twelve food portions were prepared and randomly evaluated by each participant in its printed and digital forms. The mean error (difference between the estimated and true portions) was not significantly different between the printed photos (2.1 g ± 47.2) and the digital ones (-6.4 g ± 53.7). The agreement on using the printed and digital photos was 91% and 90%, respectively. Furthermore, the use of the tablet was more prone to underestimation when compared to printed and computer-screen photos (p < 0.001). Overall, participants did not present major difficulties in perceiving the portion sizes using the printed and digital photos, but the use of tablets led to less accurate results, indicating that this needs to be further evaluated.

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OBJECTIVE: Analyze the association of work organization and sleep aspects with work ability in regular aviation pilots. METHODS: This is a cross-sectional epidemiological study with 1,234 regular aviation pilots who worked domestic and international flights, affiliated with the Brazilian Association of Civil Aviation Pilots. Data collection employed online questionnaire. We compared proportions using Pearson's Chi-squared or Fisher's exact hypothesis tests. Then, we conducted Poisson analysis, with robust variance, to test factors associated with moderate or low work ability. RESULTS: The prevalence of moderate or low work ability was 43.3%. We found that self-perception of insufficient sleep (PR = 1.29; 95%CI 1.06-1.57), increased perception for fatigue (PR = 1.51; 95%CI 1.24-1.84), more than 65 flight hours per month (PR = 1.22; 95%CI 1.01-1.46), less than 10 days of time off per month (PR = 1.27; 95%CI 1.04-1.55), and frequent operational delays (PR = 1.23; 95%CI 1.02-1.48) were factors associated with moderate or low work ability. CONCLUSIONS: Work organization was a determining factor for decreased work ability, especially concerning aspects related to rest and its influence on the sleep of pilots.

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ABSTRACT OBJECTIVE: Analyze the association of work organization and sleep aspects with work ability in regular aviation pilots. METHODS: This is a cross-sectional epidemiological study with 1,234 regular aviation pilots who worked domestic and international flights, affiliated with the Brazilian Association of Civil Aviation Pilots. Data collection employed online questionnaire. We compared proportions using Pearson's Chi-squared or Fisher's exact hypothesis tests. Then, we conducted Poisson analysis, with robust variance, to test factors associated with moderate or low work ability. RESULTS: The prevalence of moderate or low work ability was 43.3%. We found that self-perception of insufficient sleep (PR = 1.29; 95%CI 1.06-1.57), increased perception for fatigue (PR = 1.51; 95%CI 1.24-1.84), more than 65 flight hours per month (PR = 1.22; 95%CI 1.01-1.46), less than 10 days of time off per month (PR = 1.27; 95%CI 1.04-1.55), and frequent operational delays (PR = 1.23; 95%CI 1.02-1.48) were factors associated with moderate or low work ability. CONCLUSIONS: Work organization was a determining factor for decreased work ability, especially concerning aspects related to rest and its influence on the sleep of pilots.

RESUMO OBJETIVO: Analisar a associação da organização do trabalho e dos aspectos do sono com a capacidade para o trabalho entre pilotos da aviação regular. MÉTODOS: Foi realizada uma pesquisa epidemiológica transversal, com 1.234 pilotos da aviação regular, que realizavam voos de rotas nacionais e internacionais, afiliados à Associação Brasileira de Pilotos da Aviação Civil. A coleta de dados foi feita através de questionário on-line. Para comparação entre as proporções foram realizados os testes de hipóteses qui-quadrado de Pearson ou Exato de Fisher. Posteriormente, foi efetuada a análise de Poisson, com variância robusta, para testar os fatores associados à capacidade moderada ou baixa para o trabalho. RESULTADOS: A prevalência de capacidade para o trabalho moderada ou baixa foi de 43,3%. Verificou-se que autopercepção de sono insuficiente (RP = 1,29; IC95% 1,06-1,57), maior percepção para fadiga (RP = 1,51; IC95% 1,24-1,84), jornada de voo maior que 65 horas por mês (RP = 1,22; IC95% 1,01-1,46), menos de 10 dias de folga por mês (RP = 1,27; IC95% 1,04-1,55) e atrasos operacionais frequentes (RP = 1,23; IC95% 1,02-1,48) foram fatores associados à capacidade moderada ou baixa para o trabalho. CONCLUSÕES: A organização do trabalho foi um fator determinante para a diminuição da capacidade para o trabalho, em especial quanto aos aspectos relacionados ao descanso e suas repercussões no sono de pilotos.

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O principal objetivo deste estudo foi verificar a relação entre lócus de controle (LOC), fatores de personalidade, autoeficácia, sintomas de depressão, ansiedade e estresse em estudantes de graduação em Ciências Aeronáuticas. 109 participantes foram avaliados utilizando: Inventário dos Cinco Grandes Fatores da Personalidade (IGFP-5); Depression, Anxiety and Stress Scale - DASS-21; Escala de Autoeficácia Geral Percebida (EAGP), e Escala de Lócus de Controle para Segurança em Aviação. Os resultados indicaram que: Conscienciosidade correlacionou-se com autoeficácia e aspectos emocionais; Abertura e Extroversão obtiveram correlação com autoeficácia; Neuroticismo obteve correlação com autoeficácia e aspectos emocionais. Compreende-se a relevância da autoeficácia em estudantes e profissionais da aeronáutica, uma vez que tal construto relaciona-se com a saúde mental e com os comportamentos de risco.

This study was conducted to verify the relationship between locus of control (LOC), personality characteristics, self-efficacy, and depression, anxiety, and stress symptoms in adults enrolled in an Aeronautical Science graduation course. One hundred and nine participants were assessed using the following: Big Five Inventory (IGFP-5); Depression, Anxiety and Stress Scale - DASS-21; General Perceived Self-Efficacy Scale (GPSS); and Aviation Safety Locus of Control Scale. Results indicated that: Conscientiousness is correlated to self-efficacy and emotional aspects; Openness and Extraversion are correlated to self-efficacy; and Neuroticism is correlated to self-efficacy and emotional aspects. These results suggest the relevance of self-efficacy in aeronautical students and professionals, since such construct is related to both mental health and rick behavior.

El principal objetivo de este estudio fue comprobar la relación entre locus de control (LOC), factores de personalidad, autoeficacia, síntomas de depresión, ansiedad y estrés en estudiantes de graduación en Ciencias Aeronáuticas. Fueron evaluados 109 participantes, utilizando: Inventario de los Cinco Grandes Factores de la Personalidad (IGFP); Depression, Anxiety and Stress Scale - DASS-21; Escala de Autoeficacia General Percibida (EAGP), y Escala de Locus de control para seguridad en aviación. Los resultados indicaron que: Responsabilidad se correlacionó con autoeficacia y aspectos emocionales; Apertura y Extraversión obtuvieron correlación con autoeficacia; Neuroticismo obtuvo correlación con autoeficacia y aspectos emocionales. Se comprende la relevancia de la autoeficacia en estudiantes y profesionales de la aeronáutica, ya que tal constructo se relaciona con la salud mental y con los comportamientos de riesgo.

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